sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 30 | #if defined(V8_TARGET_ARCH_IA32) |
| 31 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 32 | #include "bootstrapper.h" |
| 33 | #include "codegen-inl.h" |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 34 | #include "compiler.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | #include "debug.h" |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 36 | #include "ic-inl.h" |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 37 | #include "jsregexp.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 38 | #include "parser.h" |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 39 | #include "regexp-macro-assembler.h" |
| 40 | #include "regexp-stack.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 41 | #include "register-allocator-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 42 | #include "runtime.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 43 | #include "scopes.h" |
sgjesse@chromium.org | 833cdd7 | 2010-02-26 10:06:16 +0000 | [diff] [blame] | 44 | #include "virtual-frame-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 45 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 46 | namespace v8 { |
| 47 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 48 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 49 | #define __ ACCESS_MASM(masm) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 50 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 51 | // ------------------------------------------------------------------------- |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 52 | // Platform-specific FrameRegisterState functions. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 53 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 54 | void FrameRegisterState::Save(MacroAssembler* masm) const { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 55 | for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) { |
| 56 | int action = registers_[i]; |
| 57 | if (action == kPush) { |
| 58 | __ push(RegisterAllocator::ToRegister(i)); |
| 59 | } else if (action != kIgnore && (action & kSyncedFlag) == 0) { |
| 60 | __ mov(Operand(ebp, action), RegisterAllocator::ToRegister(i)); |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 66 | void FrameRegisterState::Restore(MacroAssembler* masm) const { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 67 | // Restore registers in reverse order due to the stack. |
| 68 | for (int i = RegisterAllocator::kNumRegisters - 1; i >= 0; i--) { |
| 69 | int action = registers_[i]; |
| 70 | if (action == kPush) { |
| 71 | __ pop(RegisterAllocator::ToRegister(i)); |
| 72 | } else if (action != kIgnore) { |
| 73 | action &= ~kSyncedFlag; |
| 74 | __ mov(RegisterAllocator::ToRegister(i), Operand(ebp, action)); |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 80 | #undef __ |
| 81 | #define __ ACCESS_MASM(masm_) |
| 82 | |
| 83 | // ------------------------------------------------------------------------- |
| 84 | // Platform-specific DeferredCode functions. |
| 85 | |
| 86 | void DeferredCode::SaveRegisters() { |
| 87 | frame_state_.Save(masm_); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | void DeferredCode::RestoreRegisters() { |
| 92 | frame_state_.Restore(masm_); |
| 93 | } |
| 94 | |
| 95 | |
| 96 | // ------------------------------------------------------------------------- |
| 97 | // Platform-specific RuntimeCallHelper functions. |
| 98 | |
| 99 | void VirtualFrameRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const { |
| 100 | frame_state_->Save(masm); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | void VirtualFrameRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { |
| 105 | frame_state_->Restore(masm); |
| 106 | } |
| 107 | |
| 108 | |
| 109 | void ICRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const { |
| 110 | masm->EnterInternalFrame(); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | void ICRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { |
| 115 | masm->LeaveInternalFrame(); |
| 116 | } |
| 117 | |
| 118 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 119 | // ------------------------------------------------------------------------- |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 120 | // CodeGenState implementation. |
| 121 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 122 | CodeGenState::CodeGenState(CodeGenerator* owner) |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 123 | : owner_(owner), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 124 | destination_(NULL), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 125 | previous_(NULL) { |
| 126 | owner_->set_state(this); |
| 127 | } |
| 128 | |
| 129 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 130 | CodeGenState::CodeGenState(CodeGenerator* owner, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 131 | ControlDestination* destination) |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 132 | : owner_(owner), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 133 | destination_(destination), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 134 | previous_(owner->state()) { |
| 135 | owner_->set_state(this); |
| 136 | } |
| 137 | |
| 138 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 139 | CodeGenState::~CodeGenState() { |
| 140 | ASSERT(owner_->state() == this); |
| 141 | owner_->set_state(previous_); |
| 142 | } |
| 143 | |
| 144 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 145 | // ------------------------------------------------------------------------- |
| 146 | // CodeGenerator implementation |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 147 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 148 | CodeGenerator::CodeGenerator(MacroAssembler* masm) |
| 149 | : deferred_(8), |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 150 | masm_(masm), |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 151 | info_(NULL), |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 152 | frame_(NULL), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 153 | allocator_(NULL), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 154 | state_(NULL), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 155 | loop_nesting_(0), |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 156 | in_safe_int32_mode_(false), |
| 157 | safe_int32_mode_enabled_(true), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 158 | function_return_is_shadowed_(false), |
| 159 | in_spilled_code_(false) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | |
| 163 | // Calling conventions: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 164 | // ebp: caller's frame pointer |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 165 | // esp: stack pointer |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 166 | // edi: called JS function |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 167 | // esi: callee's context |
| 168 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 169 | void CodeGenerator::Generate(CompilationInfo* info) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 170 | // Record the position for debugging purposes. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 171 | CodeForFunctionPosition(info->function()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 172 | Comment cmnt(masm_, "[ function compiled by virtual frame code generator"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 173 | |
| 174 | // Initialize state. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 175 | info_ = info; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 176 | ASSERT(allocator_ == NULL); |
| 177 | RegisterAllocator register_allocator(this); |
| 178 | allocator_ = ®ister_allocator; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 179 | ASSERT(frame_ == NULL); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 180 | frame_ = new VirtualFrame(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 181 | set_in_spilled_code(false); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 182 | |
| 183 | // Adjust for function-level loop nesting. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 184 | ASSERT_EQ(0, loop_nesting_); |
| 185 | loop_nesting_ = info->loop_nesting(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 186 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 187 | JumpTarget::set_compiling_deferred_code(false); |
| 188 | |
iposva@chromium.org | da86e9b | 2009-05-15 23:13:59 +0000 | [diff] [blame] | 189 | #ifdef DEBUG |
| 190 | if (strlen(FLAG_stop_at) > 0 && |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 191 | info->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
iposva@chromium.org | da86e9b | 2009-05-15 23:13:59 +0000 | [diff] [blame] | 192 | frame_->SpillAll(); |
| 193 | __ int3(); |
| 194 | } |
| 195 | #endif |
| 196 | |
| 197 | // New scope to get automatic timing calculation. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 198 | { HistogramTimerScope codegen_timer(&Counters::code_generation); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 199 | CodeGenState state(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 200 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 201 | // Entry: |
| 202 | // Stack: receiver, arguments, return address. |
| 203 | // ebp: caller's frame pointer |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 204 | // esp: stack pointer |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 205 | // edi: called JS function |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 206 | // esi: callee's context |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 207 | allocator_->Initialize(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 208 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 209 | if (info->mode() == CompilationInfo::PRIMARY) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 210 | frame_->Enter(); |
| 211 | |
| 212 | // Allocate space for locals and initialize them. |
| 213 | frame_->AllocateStackSlots(); |
| 214 | |
| 215 | // Allocate the local context if needed. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 216 | int heap_slots = scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 217 | if (heap_slots > 0) { |
| 218 | Comment cmnt(masm_, "[ allocate local context"); |
| 219 | // Allocate local context. |
| 220 | // Get outer context and create a new context based on it. |
| 221 | frame_->PushFunction(); |
| 222 | Result context; |
| 223 | if (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| 224 | FastNewContextStub stub(heap_slots); |
| 225 | context = frame_->CallStub(&stub, 1); |
| 226 | } else { |
| 227 | context = frame_->CallRuntime(Runtime::kNewContext, 1); |
| 228 | } |
| 229 | |
| 230 | // Update context local. |
| 231 | frame_->SaveContextRegister(); |
| 232 | |
| 233 | // Verify that the runtime call result and esi agree. |
| 234 | if (FLAG_debug_code) { |
| 235 | __ cmp(context.reg(), Operand(esi)); |
| 236 | __ Assert(equal, "Runtime::NewContext should end up in esi"); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | // TODO(1241774): Improve this code: |
| 241 | // 1) only needed if we have a context |
| 242 | // 2) no need to recompute context ptr every single time |
| 243 | // 3) don't copy parameter operand code from SlotOperand! |
| 244 | { |
| 245 | Comment cmnt2(masm_, "[ copy context parameters into .context"); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 246 | // Note that iteration order is relevant here! If we have the same |
| 247 | // parameter twice (e.g., function (x, y, x)), and that parameter |
| 248 | // needs to be copied into the context, it must be the last argument |
| 249 | // passed to the parameter that needs to be copied. This is a rare |
| 250 | // case so we don't check for it, instead we rely on the copying |
| 251 | // order: such a parameter is copied repeatedly into the same |
| 252 | // context location and thus the last value is what is seen inside |
| 253 | // the function. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 254 | for (int i = 0; i < scope()->num_parameters(); i++) { |
| 255 | Variable* par = scope()->parameter(i); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 256 | Slot* slot = par->slot(); |
| 257 | if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| 258 | // The use of SlotOperand below is safe in unspilled code |
| 259 | // because the slot is guaranteed to be a context slot. |
| 260 | // |
| 261 | // There are no parameters in the global scope. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 262 | ASSERT(!scope()->is_global_scope()); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 263 | frame_->PushParameterAt(i); |
| 264 | Result value = frame_->Pop(); |
| 265 | value.ToRegister(); |
| 266 | |
| 267 | // SlotOperand loads context.reg() with the context object |
| 268 | // stored to, used below in RecordWrite. |
| 269 | Result context = allocator_->Allocate(); |
| 270 | ASSERT(context.is_valid()); |
| 271 | __ mov(SlotOperand(slot, context.reg()), value.reg()); |
| 272 | int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 273 | Result scratch = allocator_->Allocate(); |
| 274 | ASSERT(scratch.is_valid()); |
| 275 | frame_->Spill(context.reg()); |
| 276 | frame_->Spill(value.reg()); |
| 277 | __ RecordWrite(context.reg(), offset, value.reg(), scratch.reg()); |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | // Store the arguments object. This must happen after context |
| 283 | // initialization because the arguments object may be stored in |
| 284 | // the context. |
| 285 | if (ArgumentsMode() != NO_ARGUMENTS_ALLOCATION) { |
| 286 | StoreArgumentsObject(true); |
| 287 | } |
| 288 | |
| 289 | // Initialize ThisFunction reference if present. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 290 | if (scope()->is_function_scope() && scope()->function() != NULL) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 291 | frame_->Push(Factory::the_hole_value()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 292 | StoreToSlot(scope()->function()->slot(), NOT_CONST_INIT); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 293 | } |
| 294 | } else { |
| 295 | // When used as the secondary compiler for splitting, ebp, esi, |
| 296 | // and edi have been pushed on the stack. Adjust the virtual |
| 297 | // frame to match this state. |
| 298 | frame_->Adjust(3); |
| 299 | allocator_->Unuse(edi); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 300 | |
| 301 | // Bind all the bailout labels to the beginning of the function. |
| 302 | List<CompilationInfo::Bailout*>* bailouts = info->bailouts(); |
| 303 | for (int i = 0; i < bailouts->length(); i++) { |
| 304 | __ bind(bailouts->at(i)->label()); |
| 305 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 306 | } |
| 307 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 308 | // Initialize the function return target after the locals are set |
| 309 | // up, because it needs the expected frame height from the frame. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 310 | function_return_.set_direction(JumpTarget::BIDIRECTIONAL); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 311 | function_return_is_shadowed_ = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 312 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 313 | // Generate code to 'execute' declarations and initialize functions |
| 314 | // (source elements). In case of an illegal redeclaration we need to |
| 315 | // handle that instead of processing the declarations. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 316 | if (scope()->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 317 | Comment cmnt(masm_, "[ illegal redeclarations"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 318 | scope()->VisitIllegalRedeclaration(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 319 | } else { |
| 320 | Comment cmnt(masm_, "[ declarations"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 321 | ProcessDeclarations(scope()->declarations()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 322 | // Bail out if a stack-overflow exception occurred when processing |
| 323 | // declarations. |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 324 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | if (FLAG_trace) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 328 | frame_->CallRuntime(Runtime::kTraceEnter, 0); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 329 | // Ignore the return value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 330 | } |
| 331 | CheckStack(); |
| 332 | |
| 333 | // Compile the body of the function in a vanilla state. Don't |
| 334 | // bother compiling all the code if the scope has an illegal |
| 335 | // redeclaration. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 336 | if (!scope()->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 337 | Comment cmnt(masm_, "[ function body"); |
| 338 | #ifdef DEBUG |
| 339 | bool is_builtin = Bootstrapper::IsActive(); |
| 340 | bool should_trace = |
| 341 | is_builtin ? FLAG_trace_builtin_calls : FLAG_trace_calls; |
| 342 | if (should_trace) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 343 | frame_->CallRuntime(Runtime::kDebugTrace, 0); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 344 | // Ignore the return value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 345 | } |
| 346 | #endif |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 347 | VisitStatements(info->function()->body()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 348 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 349 | // Handle the return from the function. |
| 350 | if (has_valid_frame()) { |
| 351 | // If there is a valid frame, control flow can fall off the end of |
| 352 | // the body. In that case there is an implicit return statement. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 353 | ASSERT(!function_return_is_shadowed_); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 354 | CodeForReturnPosition(info->function()); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 355 | frame_->PrepareForReturn(); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 356 | Result undefined(Factory::undefined_value()); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 357 | if (function_return_.is_bound()) { |
| 358 | function_return_.Jump(&undefined); |
| 359 | } else { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 360 | function_return_.Bind(&undefined); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 361 | GenerateReturnSequence(&undefined); |
| 362 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 363 | } else if (function_return_.is_linked()) { |
| 364 | // If the return target has dangling jumps to it, then we have not |
| 365 | // yet generated the return sequence. This can happen when (a) |
| 366 | // control does not flow off the end of the body so we did not |
| 367 | // compile an artificial return statement just above, and (b) there |
| 368 | // are return statements in the body but (c) they are all shadowed. |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 369 | Result return_value; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 370 | function_return_.Bind(&return_value); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 371 | GenerateReturnSequence(&return_value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 372 | } |
| 373 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 374 | } |
| 375 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 376 | // Adjust for function-level loop nesting. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 377 | ASSERT_EQ(info->loop_nesting(), loop_nesting_); |
| 378 | loop_nesting_ = 0; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 379 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 380 | // Code generation state must be reset. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 381 | ASSERT(state_ == NULL); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 382 | ASSERT(loop_nesting() == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 383 | ASSERT(!function_return_is_shadowed_); |
| 384 | function_return_.Unuse(); |
| 385 | DeleteFrame(); |
| 386 | |
| 387 | // Process any deferred code using the register allocator. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 388 | if (!HasStackOverflow()) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 389 | HistogramTimerScope deferred_timer(&Counters::deferred_code_generation); |
| 390 | JumpTarget::set_compiling_deferred_code(true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 391 | ProcessDeferred(); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 392 | JumpTarget::set_compiling_deferred_code(false); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | // There is no need to delete the register allocator, it is a |
| 396 | // stack-allocated local. |
| 397 | allocator_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 401 | Operand CodeGenerator::SlotOperand(Slot* slot, Register tmp) { |
| 402 | // Currently, this assertion will fail if we try to assign to |
| 403 | // a constant variable that is constant because it is read-only |
| 404 | // (such as the variable referring to a named function expression). |
| 405 | // We need to implement assignments to read-only variables. |
| 406 | // Ideally, we should do this during AST generation (by converting |
| 407 | // such assignments into expression statements); however, in general |
| 408 | // we may not be able to make the decision until past AST generation, |
| 409 | // that is when the entire program is known. |
| 410 | ASSERT(slot != NULL); |
| 411 | int index = slot->index(); |
| 412 | switch (slot->type()) { |
| 413 | case Slot::PARAMETER: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 414 | return frame_->ParameterAt(index); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 415 | |
| 416 | case Slot::LOCAL: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 417 | return frame_->LocalAt(index); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 418 | |
| 419 | case Slot::CONTEXT: { |
| 420 | // Follow the context chain if necessary. |
| 421 | ASSERT(!tmp.is(esi)); // do not overwrite context register |
| 422 | Register context = esi; |
| 423 | int chain_length = scope()->ContextChainLength(slot->var()->scope()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 424 | for (int i = 0; i < chain_length; i++) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 425 | // Load the closure. |
| 426 | // (All contexts, even 'with' contexts, have a closure, |
| 427 | // and it is the same for all contexts inside a function. |
| 428 | // There is no need to go to the function context first.) |
| 429 | __ mov(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 430 | // Load the function context (which is the incoming, outer context). |
| 431 | __ mov(tmp, FieldOperand(tmp, JSFunction::kContextOffset)); |
| 432 | context = tmp; |
| 433 | } |
| 434 | // We may have a 'with' context now. Get the function context. |
| 435 | // (In fact this mov may never be the needed, since the scope analysis |
| 436 | // may not permit a direct context access in this case and thus we are |
| 437 | // always at a function context. However it is safe to dereference be- |
| 438 | // cause the function context of a function context is itself. Before |
| 439 | // deleting this mov we should try to create a counter-example first, |
| 440 | // though...) |
| 441 | __ mov(tmp, ContextOperand(context, Context::FCONTEXT_INDEX)); |
| 442 | return ContextOperand(tmp, index); |
| 443 | } |
| 444 | |
| 445 | default: |
| 446 | UNREACHABLE(); |
| 447 | return Operand(eax); |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 452 | Operand CodeGenerator::ContextSlotOperandCheckExtensions(Slot* slot, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 453 | Result tmp, |
| 454 | JumpTarget* slow) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 455 | ASSERT(slot->type() == Slot::CONTEXT); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 456 | ASSERT(tmp.is_register()); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 457 | Register context = esi; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 458 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 459 | for (Scope* s = scope(); s != slot->var()->scope(); s = s->outer_scope()) { |
| 460 | if (s->num_heap_slots() > 0) { |
| 461 | if (s->calls_eval()) { |
| 462 | // Check that extension is NULL. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 463 | __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 464 | Immediate(0)); |
| 465 | slow->Branch(not_equal, not_taken); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 466 | } |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 467 | __ mov(tmp.reg(), ContextOperand(context, Context::CLOSURE_INDEX)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 468 | __ mov(tmp.reg(), FieldOperand(tmp.reg(), JSFunction::kContextOffset)); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 469 | context = tmp.reg(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 470 | } |
| 471 | } |
| 472 | // Check that last extension is NULL. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 473 | __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), Immediate(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 474 | slow->Branch(not_equal, not_taken); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 475 | __ mov(tmp.reg(), ContextOperand(context, Context::FCONTEXT_INDEX)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 476 | return ContextOperand(tmp.reg(), slot->index()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 480 | // Emit code to load the value of an expression to the top of the |
| 481 | // frame. If the expression is boolean-valued it may be compiled (or |
| 482 | // partially compiled) into control flow to the control destination. |
| 483 | // If force_control is true, control flow is forced. |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 484 | void CodeGenerator::LoadCondition(Expression* expr, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 485 | ControlDestination* dest, |
| 486 | bool force_control) { |
| 487 | ASSERT(!in_spilled_code()); |
| 488 | int original_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 489 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 490 | { CodeGenState new_state(this, dest); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 491 | Visit(expr); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 492 | |
| 493 | // If we hit a stack overflow, we may not have actually visited |
| 494 | // the expression. In that case, we ensure that we have a |
| 495 | // valid-looking frame state because we will continue to generate |
| 496 | // code as we unwind the C++ stack. |
| 497 | // |
| 498 | // It's possible to have both a stack overflow and a valid frame |
| 499 | // state (eg, a subexpression overflowed, visiting it returned |
| 500 | // with a dummied frame state, and visiting this expression |
| 501 | // returned with a normal-looking state). |
| 502 | if (HasStackOverflow() && |
| 503 | !dest->is_used() && |
| 504 | frame_->height() == original_height) { |
| 505 | dest->Goto(true); |
| 506 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 507 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 508 | |
| 509 | if (force_control && !dest->is_used()) { |
| 510 | // Convert the TOS value into flow to the control destination. |
| 511 | ToBoolean(dest); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 512 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 513 | |
| 514 | ASSERT(!(force_control && !dest->is_used())); |
| 515 | ASSERT(dest->is_used() || frame_->height() == original_height + 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 519 | void CodeGenerator::LoadAndSpill(Expression* expression) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 520 | ASSERT(in_spilled_code()); |
| 521 | set_in_spilled_code(false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 522 | Load(expression); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 523 | frame_->SpillAll(); |
| 524 | set_in_spilled_code(true); |
| 525 | } |
| 526 | |
| 527 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 528 | void CodeGenerator::LoadInSafeInt32Mode(Expression* expr, |
| 529 | BreakTarget* unsafe_bailout) { |
| 530 | set_unsafe_bailout(unsafe_bailout); |
| 531 | set_in_safe_int32_mode(true); |
| 532 | Load(expr); |
| 533 | Result value = frame_->Pop(); |
| 534 | ASSERT(frame_->HasNoUntaggedInt32Elements()); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 535 | if (expr->GuaranteedSmiResult()) { |
| 536 | ConvertInt32ResultToSmi(&value); |
| 537 | } else { |
| 538 | ConvertInt32ResultToNumber(&value); |
| 539 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 540 | set_in_safe_int32_mode(false); |
| 541 | set_unsafe_bailout(NULL); |
| 542 | frame_->Push(&value); |
| 543 | } |
| 544 | |
| 545 | |
| 546 | void CodeGenerator::LoadWithSafeInt32ModeDisabled(Expression* expr) { |
| 547 | set_safe_int32_mode_enabled(false); |
| 548 | Load(expr); |
| 549 | set_safe_int32_mode_enabled(true); |
| 550 | } |
| 551 | |
| 552 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 553 | void CodeGenerator::ConvertInt32ResultToSmi(Result* value) { |
| 554 | ASSERT(value->is_untagged_int32()); |
| 555 | if (value->is_register()) { |
| 556 | __ add(value->reg(), Operand(value->reg())); |
| 557 | } else { |
| 558 | ASSERT(value->is_constant()); |
| 559 | ASSERT(value->handle()->IsSmi()); |
| 560 | } |
| 561 | value->set_untagged_int32(false); |
| 562 | value->set_type_info(TypeInfo::Smi()); |
| 563 | } |
| 564 | |
| 565 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 566 | void CodeGenerator::ConvertInt32ResultToNumber(Result* value) { |
| 567 | ASSERT(value->is_untagged_int32()); |
| 568 | if (value->is_register()) { |
| 569 | Register val = value->reg(); |
| 570 | JumpTarget done; |
| 571 | __ add(val, Operand(val)); |
| 572 | done.Branch(no_overflow, value); |
| 573 | __ sar(val, 1); |
| 574 | // If there was an overflow, bits 30 and 31 of the original number disagree. |
| 575 | __ xor_(val, 0x80000000u); |
| 576 | if (CpuFeatures::IsSupported(SSE2)) { |
| 577 | CpuFeatures::Scope fscope(SSE2); |
| 578 | __ cvtsi2sd(xmm0, Operand(val)); |
| 579 | } else { |
| 580 | // Move val to ST[0] in the FPU |
| 581 | // Push and pop are safe with respect to the virtual frame because |
| 582 | // all synced elements are below the actual stack pointer. |
| 583 | __ push(val); |
| 584 | __ fild_s(Operand(esp, 0)); |
| 585 | __ pop(val); |
| 586 | } |
| 587 | Result scratch = allocator_->Allocate(); |
| 588 | ASSERT(scratch.is_register()); |
| 589 | Label allocation_failed; |
| 590 | __ AllocateHeapNumber(val, scratch.reg(), |
| 591 | no_reg, &allocation_failed); |
| 592 | VirtualFrame* clone = new VirtualFrame(frame_); |
| 593 | scratch.Unuse(); |
| 594 | if (CpuFeatures::IsSupported(SSE2)) { |
| 595 | CpuFeatures::Scope fscope(SSE2); |
| 596 | __ movdbl(FieldOperand(val, HeapNumber::kValueOffset), xmm0); |
| 597 | } else { |
| 598 | __ fstp_d(FieldOperand(val, HeapNumber::kValueOffset)); |
| 599 | } |
| 600 | done.Jump(value); |
| 601 | |
| 602 | // Establish the virtual frame, cloned from where AllocateHeapNumber |
| 603 | // jumped to allocation_failed. |
| 604 | RegisterFile empty_regs; |
| 605 | SetFrame(clone, &empty_regs); |
| 606 | __ bind(&allocation_failed); |
| 607 | unsafe_bailout_->Jump(); |
| 608 | |
| 609 | done.Bind(value); |
| 610 | } else { |
| 611 | ASSERT(value->is_constant()); |
| 612 | } |
| 613 | value->set_untagged_int32(false); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 614 | value->set_type_info(TypeInfo::Integer32()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 618 | void CodeGenerator::Load(Expression* expr) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 619 | #ifdef DEBUG |
| 620 | int original_height = frame_->height(); |
| 621 | #endif |
| 622 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 623 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 624 | // If the expression should be a side-effect-free 32-bit int computation, |
| 625 | // compile that SafeInt32 path, and a bailout path. |
| 626 | if (!in_safe_int32_mode() && |
| 627 | safe_int32_mode_enabled() && |
| 628 | expr->side_effect_free() && |
| 629 | expr->num_bit_ops() > 2 && |
| 630 | CpuFeatures::IsSupported(SSE2)) { |
| 631 | BreakTarget unsafe_bailout; |
| 632 | JumpTarget done; |
| 633 | unsafe_bailout.set_expected_height(frame_->height()); |
| 634 | LoadInSafeInt32Mode(expr, &unsafe_bailout); |
| 635 | done.Jump(); |
| 636 | |
| 637 | if (unsafe_bailout.is_linked()) { |
| 638 | unsafe_bailout.Bind(); |
| 639 | LoadWithSafeInt32ModeDisabled(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 640 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 641 | done.Bind(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 642 | } else { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 643 | JumpTarget true_target; |
| 644 | JumpTarget false_target; |
| 645 | |
| 646 | ControlDestination dest(&true_target, &false_target, true); |
| 647 | LoadCondition(expr, &dest, false); |
| 648 | |
| 649 | if (dest.false_was_fall_through()) { |
| 650 | // The false target was just bound. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 651 | JumpTarget loaded; |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 652 | frame_->Push(Factory::false_value()); |
| 653 | // There may be dangling jumps to the true target. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 654 | if (true_target.is_linked()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 655 | loaded.Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 656 | true_target.Bind(); |
| 657 | frame_->Push(Factory::true_value()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 658 | loaded.Bind(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 659 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 660 | |
| 661 | } else if (dest.is_used()) { |
| 662 | // There is true, and possibly false, control flow (with true as |
| 663 | // the fall through). |
| 664 | JumpTarget loaded; |
| 665 | frame_->Push(Factory::true_value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 666 | if (false_target.is_linked()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 667 | loaded.Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 668 | false_target.Bind(); |
| 669 | frame_->Push(Factory::false_value()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 670 | loaded.Bind(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 671 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 672 | |
| 673 | } else { |
| 674 | // We have a valid value on top of the frame, but we still may |
| 675 | // have dangling jumps to the true and false targets from nested |
| 676 | // subexpressions (eg, the left subexpressions of the |
| 677 | // short-circuited boolean operators). |
| 678 | ASSERT(has_valid_frame()); |
| 679 | if (true_target.is_linked() || false_target.is_linked()) { |
| 680 | JumpTarget loaded; |
| 681 | loaded.Jump(); // Don't lose the current TOS. |
| 682 | if (true_target.is_linked()) { |
| 683 | true_target.Bind(); |
| 684 | frame_->Push(Factory::true_value()); |
| 685 | if (false_target.is_linked()) { |
| 686 | loaded.Jump(); |
| 687 | } |
| 688 | } |
| 689 | if (false_target.is_linked()) { |
| 690 | false_target.Bind(); |
| 691 | frame_->Push(Factory::false_value()); |
| 692 | } |
| 693 | loaded.Bind(); |
| 694 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 695 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 696 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 697 | ASSERT(has_valid_frame()); |
| 698 | ASSERT(frame_->height() == original_height + 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 702 | void CodeGenerator::LoadGlobal() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 703 | if (in_spilled_code()) { |
| 704 | frame_->EmitPush(GlobalObject()); |
| 705 | } else { |
| 706 | Result temp = allocator_->Allocate(); |
| 707 | __ mov(temp.reg(), GlobalObject()); |
| 708 | frame_->Push(&temp); |
| 709 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 710 | } |
| 711 | |
| 712 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 713 | void CodeGenerator::LoadGlobalReceiver() { |
| 714 | Result temp = allocator_->Allocate(); |
| 715 | Register reg = temp.reg(); |
| 716 | __ mov(reg, GlobalObject()); |
| 717 | __ mov(reg, FieldOperand(reg, GlobalObject::kGlobalReceiverOffset)); |
| 718 | frame_->Push(&temp); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 722 | void CodeGenerator::LoadTypeofExpression(Expression* expr) { |
| 723 | // Special handling of identifiers as subexpressions of typeof. |
| 724 | Variable* variable = expr->AsVariableProxy()->AsVariable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 725 | if (variable != NULL && !variable->is_this() && variable->is_global()) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 726 | // For a global variable we build the property reference |
| 727 | // <global>.<variable> and perform a (regular non-contextual) property |
| 728 | // load to make sure we do not get reference errors. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 729 | Slot global(variable, Slot::CONTEXT, Context::GLOBAL_INDEX); |
| 730 | Literal key(variable->name()); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 731 | Property property(&global, &key, RelocInfo::kNoPosition); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 732 | Reference ref(this, &property); |
| 733 | ref.GetValue(); |
| 734 | } else if (variable != NULL && variable->slot() != NULL) { |
| 735 | // For a variable that rewrites to a slot, we signal it is the immediate |
| 736 | // subexpression of a typeof. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 737 | LoadFromSlotCheckForArguments(variable->slot(), INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 738 | } else { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 739 | // Anything else can be handled normally. |
| 740 | Load(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 741 | } |
| 742 | } |
| 743 | |
| 744 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 745 | ArgumentsAllocationMode CodeGenerator::ArgumentsMode() { |
| 746 | if (scope()->arguments() == NULL) return NO_ARGUMENTS_ALLOCATION; |
| 747 | ASSERT(scope()->arguments_shadow() != NULL); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 748 | // We don't want to do lazy arguments allocation for functions that |
| 749 | // have heap-allocated contexts, because it interfers with the |
| 750 | // uninitialized const tracking in the context objects. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 751 | return (scope()->num_heap_slots() > 0) |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 752 | ? EAGER_ARGUMENTS_ALLOCATION |
| 753 | : LAZY_ARGUMENTS_ALLOCATION; |
| 754 | } |
| 755 | |
| 756 | |
| 757 | Result CodeGenerator::StoreArgumentsObject(bool initial) { |
| 758 | ArgumentsAllocationMode mode = ArgumentsMode(); |
| 759 | ASSERT(mode != NO_ARGUMENTS_ALLOCATION); |
| 760 | |
| 761 | Comment cmnt(masm_, "[ store arguments object"); |
| 762 | if (mode == LAZY_ARGUMENTS_ALLOCATION && initial) { |
| 763 | // When using lazy arguments allocation, we store the hole value |
| 764 | // as a sentinel indicating that the arguments object hasn't been |
| 765 | // allocated yet. |
| 766 | frame_->Push(Factory::the_hole_value()); |
| 767 | } else { |
| 768 | ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT); |
| 769 | frame_->PushFunction(); |
| 770 | frame_->PushReceiverSlotAddress(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 771 | frame_->Push(Smi::FromInt(scope()->num_parameters())); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 772 | Result result = frame_->CallStub(&stub, 3); |
| 773 | frame_->Push(&result); |
| 774 | } |
| 775 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 776 | Variable* arguments = scope()->arguments()->var(); |
| 777 | Variable* shadow = scope()->arguments_shadow()->var(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 778 | ASSERT(arguments != NULL && arguments->slot() != NULL); |
| 779 | ASSERT(shadow != NULL && shadow->slot() != NULL); |
| 780 | JumpTarget done; |
| 781 | bool skip_arguments = false; |
| 782 | if (mode == LAZY_ARGUMENTS_ALLOCATION && !initial) { |
| 783 | // We have to skip storing into the arguments slot if it has already |
| 784 | // been written to. This can happen if the a function has a local |
| 785 | // variable named 'arguments'. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 786 | LoadFromSlot(arguments->slot(), NOT_INSIDE_TYPEOF); |
| 787 | Result probe = frame_->Pop(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 788 | if (probe.is_constant()) { |
| 789 | // We have to skip updating the arguments object if it has |
| 790 | // been assigned a proper value. |
| 791 | skip_arguments = !probe.handle()->IsTheHole(); |
| 792 | } else { |
| 793 | __ cmp(Operand(probe.reg()), Immediate(Factory::the_hole_value())); |
| 794 | probe.Unuse(); |
| 795 | done.Branch(not_equal); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 796 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 797 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 798 | if (!skip_arguments) { |
| 799 | StoreToSlot(arguments->slot(), NOT_CONST_INIT); |
| 800 | if (mode == LAZY_ARGUMENTS_ALLOCATION) done.Bind(); |
| 801 | } |
| 802 | StoreToSlot(shadow->slot(), NOT_CONST_INIT); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 803 | return frame_->Pop(); |
| 804 | } |
| 805 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 806 | //------------------------------------------------------------------------------ |
| 807 | // CodeGenerator implementation of variables, lookups, and stores. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 808 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 809 | Reference::Reference(CodeGenerator* cgen, |
| 810 | Expression* expression, |
| 811 | bool persist_after_get) |
| 812 | : cgen_(cgen), |
| 813 | expression_(expression), |
| 814 | type_(ILLEGAL), |
| 815 | persist_after_get_(persist_after_get) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 816 | cgen->LoadReference(this); |
| 817 | } |
| 818 | |
| 819 | |
| 820 | Reference::~Reference() { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 821 | ASSERT(is_unloaded() || is_illegal()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 825 | void CodeGenerator::LoadReference(Reference* ref) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 826 | // References are loaded from both spilled and unspilled code. Set the |
| 827 | // state to unspilled to allow that (and explicitly spill after |
| 828 | // construction at the construction sites). |
| 829 | bool was_in_spilled_code = in_spilled_code_; |
| 830 | in_spilled_code_ = false; |
| 831 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 832 | Comment cmnt(masm_, "[ LoadReference"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 833 | Expression* e = ref->expression(); |
| 834 | Property* property = e->AsProperty(); |
| 835 | Variable* var = e->AsVariableProxy()->AsVariable(); |
| 836 | |
| 837 | if (property != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 838 | // The expression is either a property or a variable proxy that rewrites |
| 839 | // to a property. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 840 | Load(property->obj()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 841 | if (property->key()->IsPropertyName()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 842 | ref->set_type(Reference::NAMED); |
| 843 | } else { |
| 844 | Load(property->key()); |
| 845 | ref->set_type(Reference::KEYED); |
| 846 | } |
| 847 | } else if (var != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 848 | // The expression is a variable proxy that does not rewrite to a |
| 849 | // property. Global variables are treated as named property references. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 850 | if (var->is_global()) { |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 851 | // If eax is free, the register allocator prefers it. Thus the code |
| 852 | // generator will load the global object into eax, which is where |
| 853 | // LoadIC wants it. Most uses of Reference call LoadIC directly |
| 854 | // after the reference is created. |
| 855 | frame_->Spill(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 856 | LoadGlobal(); |
| 857 | ref->set_type(Reference::NAMED); |
| 858 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 859 | ASSERT(var->slot() != NULL); |
| 860 | ref->set_type(Reference::SLOT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 861 | } |
| 862 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 863 | // Anything else is a runtime error. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 864 | Load(e); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 865 | frame_->CallRuntime(Runtime::kThrowReferenceError, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 866 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 867 | |
| 868 | in_spilled_code_ = was_in_spilled_code; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 872 | // ECMA-262, section 9.2, page 30: ToBoolean(). Pop the top of stack and |
| 873 | // convert it to a boolean in the condition code register or jump to |
| 874 | // 'false_target'/'true_target' as appropriate. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 875 | void CodeGenerator::ToBoolean(ControlDestination* dest) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 876 | Comment cmnt(masm_, "[ ToBoolean"); |
| 877 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 878 | // The value to convert should be popped from the frame. |
| 879 | Result value = frame_->Pop(); |
| 880 | value.ToRegister(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 881 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 882 | if (value.is_integer32()) { // Also takes Smi case. |
| 883 | Comment cmnt(masm_, "ONLY_INTEGER_32"); |
| 884 | if (FLAG_debug_code) { |
| 885 | Label ok; |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 886 | __ AbortIfNotNumber(value.reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 887 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 888 | __ j(zero, &ok); |
| 889 | __ fldz(); |
| 890 | __ fld_d(FieldOperand(value.reg(), HeapNumber::kValueOffset)); |
| 891 | __ FCmp(); |
| 892 | __ j(not_zero, &ok); |
| 893 | __ Abort("Smi was wrapped in HeapNumber in output from bitop"); |
| 894 | __ bind(&ok); |
| 895 | } |
| 896 | // In the integer32 case there are no Smis hidden in heap numbers, so we |
| 897 | // need only test for Smi zero. |
| 898 | __ test(value.reg(), Operand(value.reg())); |
| 899 | dest->false_target()->Branch(zero); |
| 900 | value.Unuse(); |
| 901 | dest->Split(not_zero); |
| 902 | } else if (value.is_number()) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 903 | Comment cmnt(masm_, "ONLY_NUMBER"); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 904 | // Fast case if TypeInfo indicates only numbers. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 905 | if (FLAG_debug_code) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 906 | __ AbortIfNotNumber(value.reg()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 907 | } |
| 908 | // Smi => false iff zero. |
| 909 | ASSERT(kSmiTag == 0); |
| 910 | __ test(value.reg(), Operand(value.reg())); |
| 911 | dest->false_target()->Branch(zero); |
| 912 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 913 | dest->true_target()->Branch(zero); |
| 914 | __ fldz(); |
| 915 | __ fld_d(FieldOperand(value.reg(), HeapNumber::kValueOffset)); |
| 916 | __ FCmp(); |
| 917 | value.Unuse(); |
| 918 | dest->Split(not_zero); |
| 919 | } else { |
| 920 | // Fast case checks. |
| 921 | // 'false' => false. |
| 922 | __ cmp(value.reg(), Factory::false_value()); |
| 923 | dest->false_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 924 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 925 | // 'true' => true. |
| 926 | __ cmp(value.reg(), Factory::true_value()); |
| 927 | dest->true_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 928 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 929 | // 'undefined' => false. |
| 930 | __ cmp(value.reg(), Factory::undefined_value()); |
| 931 | dest->false_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 932 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 933 | // Smi => false iff zero. |
| 934 | ASSERT(kSmiTag == 0); |
| 935 | __ test(value.reg(), Operand(value.reg())); |
| 936 | dest->false_target()->Branch(zero); |
| 937 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 938 | dest->true_target()->Branch(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 939 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 940 | // Call the stub for all other cases. |
| 941 | frame_->Push(&value); // Undo the Pop() from above. |
| 942 | ToBooleanStub stub; |
| 943 | Result temp = frame_->CallStub(&stub, 1); |
| 944 | // Convert the result to a condition code. |
| 945 | __ test(temp.reg(), Operand(temp.reg())); |
| 946 | temp.Unuse(); |
| 947 | dest->Split(not_equal); |
| 948 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 952 | class FloatingPointHelper : public AllStatic { |
| 953 | public: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 954 | |
| 955 | enum ArgLocation { |
| 956 | ARGS_ON_STACK, |
| 957 | ARGS_IN_REGISTERS |
| 958 | }; |
| 959 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 960 | // Code pattern for loading a floating point value. Input value must |
| 961 | // be either a smi or a heap number object (fp value). Requirements: |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 962 | // operand in register number. Returns operand as floating point number |
| 963 | // on FPU stack. |
| 964 | static void LoadFloatOperand(MacroAssembler* masm, Register number); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 965 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 966 | // Code pattern for loading floating point values. Input values must |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 967 | // be either smi or heap number objects (fp values). Requirements: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 968 | // operand_1 on TOS+1 or in edx, operand_2 on TOS+2 or in eax. |
| 969 | // Returns operands as floating point numbers on FPU stack. |
| 970 | static void LoadFloatOperands(MacroAssembler* masm, |
| 971 | Register scratch, |
| 972 | ArgLocation arg_location = ARGS_ON_STACK); |
| 973 | |
| 974 | // Similar to LoadFloatOperand but assumes that both operands are smis. |
| 975 | // Expects operands in edx, eax. |
| 976 | static void LoadFloatSmis(MacroAssembler* masm, Register scratch); |
| 977 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 978 | // Test if operands are smi or number objects (fp). Requirements: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 979 | // operand_1 in eax, operand_2 in edx; falls through on float |
| 980 | // operands, jumps to the non_float label otherwise. |
| 981 | static void CheckFloatOperands(MacroAssembler* masm, |
| 982 | Label* non_float, |
| 983 | Register scratch); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 984 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 985 | // Takes the operands in edx and eax and loads them as integers in eax |
| 986 | // and ecx. |
| 987 | static void LoadAsIntegers(MacroAssembler* masm, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 988 | TypeInfo type_info, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 989 | bool use_sse3, |
| 990 | Label* operand_conversion_failure); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 991 | static void LoadNumbersAsIntegers(MacroAssembler* masm, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 992 | TypeInfo type_info, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 993 | bool use_sse3, |
| 994 | Label* operand_conversion_failure); |
| 995 | static void LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 996 | bool use_sse3, |
| 997 | Label* operand_conversion_failure); |
| 998 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 999 | // Test if operands are smis or heap numbers and load them |
| 1000 | // into xmm0 and xmm1 if they are. Operands are in edx and eax. |
| 1001 | // Leaves operands unchanged. |
| 1002 | static void LoadSSE2Operands(MacroAssembler* masm); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1003 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1004 | // Test if operands are numbers (smi or HeapNumber objects), and load |
| 1005 | // them into xmm0 and xmm1 if they are. Jump to label not_numbers if |
| 1006 | // either operand is not a number. Operands are in edx and eax. |
| 1007 | // Leaves operands unchanged. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1008 | static void LoadSSE2Operands(MacroAssembler* masm, Label* not_numbers); |
| 1009 | |
| 1010 | // Similar to LoadSSE2Operands but assumes that both operands are smis. |
| 1011 | // Expects operands in edx, eax. |
| 1012 | static void LoadSSE2Smis(MacroAssembler* masm, Register scratch); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1013 | }; |
| 1014 | |
| 1015 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1016 | const char* GenericBinaryOpStub::GetName() { |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1017 | if (name_ != NULL) return name_; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1018 | const int kMaxNameLength = 100; |
| 1019 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1020 | if (name_ == NULL) return "OOM"; |
| 1021 | const char* op_name = Token::Name(op_); |
| 1022 | const char* overwrite_name; |
| 1023 | switch (mode_) { |
| 1024 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 1025 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 1026 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 1027 | default: overwrite_name = "UnknownOverwrite"; break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1028 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1029 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1030 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1031 | "GenericBinaryOpStub_%s_%s%s_%s%s_%s_%s", |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1032 | op_name, |
| 1033 | overwrite_name, |
| 1034 | (flags_ & NO_SMI_CODE_IN_STUB) ? "_NoSmiInStub" : "", |
| 1035 | args_in_registers_ ? "RegArgs" : "StackArgs", |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1036 | args_reversed_ ? "_R" : "", |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1037 | static_operands_type_.ToString(), |
| 1038 | BinaryOpIC::GetName(runtime_operands_type_)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1039 | return name_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1040 | } |
| 1041 | |
| 1042 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1043 | // Call the specialized stub for a binary operation. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1044 | class DeferredInlineBinaryOperation: public DeferredCode { |
| 1045 | public: |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1046 | DeferredInlineBinaryOperation(Token::Value op, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1047 | Register dst, |
| 1048 | Register left, |
| 1049 | Register right, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1050 | TypeInfo left_info, |
| 1051 | TypeInfo right_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1052 | OverwriteMode mode) |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1053 | : op_(op), dst_(dst), left_(left), right_(right), |
| 1054 | left_info_(left_info), right_info_(right_info), mode_(mode) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1055 | set_comment("[ DeferredInlineBinaryOperation"); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1056 | } |
| 1057 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1058 | virtual void Generate(); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1059 | |
| 1060 | private: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1061 | Token::Value op_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1062 | Register dst_; |
| 1063 | Register left_; |
| 1064 | Register right_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1065 | TypeInfo left_info_; |
| 1066 | TypeInfo right_info_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1067 | OverwriteMode mode_; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1068 | }; |
| 1069 | |
| 1070 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1071 | void DeferredInlineBinaryOperation::Generate() { |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1072 | Label done; |
| 1073 | if (CpuFeatures::IsSupported(SSE2) && ((op_ == Token::ADD) || |
| 1074 | (op_ ==Token::SUB) || |
| 1075 | (op_ == Token::MUL) || |
| 1076 | (op_ == Token::DIV))) { |
| 1077 | CpuFeatures::Scope use_sse2(SSE2); |
| 1078 | Label call_runtime, after_alloc_failure; |
| 1079 | Label left_smi, right_smi, load_right, do_op; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1080 | if (!left_info_.IsSmi()) { |
| 1081 | __ test(left_, Immediate(kSmiTagMask)); |
| 1082 | __ j(zero, &left_smi); |
| 1083 | if (!left_info_.IsNumber()) { |
| 1084 | __ cmp(FieldOperand(left_, HeapObject::kMapOffset), |
| 1085 | Factory::heap_number_map()); |
| 1086 | __ j(not_equal, &call_runtime); |
| 1087 | } |
| 1088 | __ movdbl(xmm0, FieldOperand(left_, HeapNumber::kValueOffset)); |
| 1089 | if (mode_ == OVERWRITE_LEFT) { |
| 1090 | __ mov(dst_, left_); |
| 1091 | } |
| 1092 | __ jmp(&load_right); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1093 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1094 | __ bind(&left_smi); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1095 | } else { |
| 1096 | if (FLAG_debug_code) __ AbortIfNotSmi(left_); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1097 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1098 | __ SmiUntag(left_); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1099 | __ cvtsi2sd(xmm0, Operand(left_)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1100 | __ SmiTag(left_); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1101 | if (mode_ == OVERWRITE_LEFT) { |
| 1102 | Label alloc_failure; |
| 1103 | __ push(left_); |
| 1104 | __ AllocateHeapNumber(dst_, left_, no_reg, &after_alloc_failure); |
| 1105 | __ pop(left_); |
| 1106 | } |
| 1107 | |
| 1108 | __ bind(&load_right); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1109 | if (!right_info_.IsSmi()) { |
| 1110 | __ test(right_, Immediate(kSmiTagMask)); |
| 1111 | __ j(zero, &right_smi); |
| 1112 | if (!right_info_.IsNumber()) { |
| 1113 | __ cmp(FieldOperand(right_, HeapObject::kMapOffset), |
| 1114 | Factory::heap_number_map()); |
| 1115 | __ j(not_equal, &call_runtime); |
| 1116 | } |
| 1117 | __ movdbl(xmm1, FieldOperand(right_, HeapNumber::kValueOffset)); |
| 1118 | if (mode_ == OVERWRITE_RIGHT) { |
| 1119 | __ mov(dst_, right_); |
| 1120 | } else if (mode_ == NO_OVERWRITE) { |
| 1121 | Label alloc_failure; |
| 1122 | __ push(left_); |
| 1123 | __ AllocateHeapNumber(dst_, left_, no_reg, &after_alloc_failure); |
| 1124 | __ pop(left_); |
| 1125 | } |
| 1126 | __ jmp(&do_op); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1127 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1128 | __ bind(&right_smi); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1129 | } else { |
| 1130 | if (FLAG_debug_code) __ AbortIfNotSmi(right_); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1131 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1132 | __ SmiUntag(right_); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1133 | __ cvtsi2sd(xmm1, Operand(right_)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1134 | __ SmiTag(right_); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1135 | if (mode_ == OVERWRITE_RIGHT || mode_ == NO_OVERWRITE) { |
| 1136 | Label alloc_failure; |
| 1137 | __ push(left_); |
| 1138 | __ AllocateHeapNumber(dst_, left_, no_reg, &after_alloc_failure); |
| 1139 | __ pop(left_); |
| 1140 | } |
| 1141 | |
| 1142 | __ bind(&do_op); |
| 1143 | switch (op_) { |
| 1144 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 1145 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 1146 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 1147 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 1148 | default: UNREACHABLE(); |
| 1149 | } |
| 1150 | __ movdbl(FieldOperand(dst_, HeapNumber::kValueOffset), xmm0); |
| 1151 | __ jmp(&done); |
| 1152 | |
| 1153 | __ bind(&after_alloc_failure); |
| 1154 | __ pop(left_); |
| 1155 | __ bind(&call_runtime); |
| 1156 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1157 | GenericBinaryOpStub stub(op_, |
| 1158 | mode_, |
| 1159 | NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1160 | TypeInfo::Combine(left_info_, right_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1161 | stub.GenerateCall(masm_, left_, right_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1162 | if (!dst_.is(eax)) __ mov(dst_, eax); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 1163 | __ bind(&done); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1167 | static TypeInfo CalculateTypeInfo(TypeInfo operands_type, |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1168 | Token::Value op, |
| 1169 | const Result& right, |
| 1170 | const Result& left) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1171 | // Set TypeInfo of result according to the operation performed. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1172 | // Rely on the fact that smis have a 31 bit payload on ia32. |
| 1173 | ASSERT(kSmiValueSize == 31); |
| 1174 | switch (op) { |
| 1175 | case Token::COMMA: |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1176 | return right.type_info(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1177 | case Token::OR: |
| 1178 | case Token::AND: |
| 1179 | // Result type can be either of the two input types. |
| 1180 | return operands_type; |
| 1181 | case Token::BIT_AND: { |
| 1182 | // Anding with positive Smis will give you a Smi. |
| 1183 | if (right.is_constant() && right.handle()->IsSmi() && |
| 1184 | Smi::cast(*right.handle())->value() >= 0) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1185 | return TypeInfo::Smi(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1186 | } else if (left.is_constant() && left.handle()->IsSmi() && |
| 1187 | Smi::cast(*left.handle())->value() >= 0) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1188 | return TypeInfo::Smi(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1189 | } |
| 1190 | return (operands_type.IsSmi()) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1191 | ? TypeInfo::Smi() |
| 1192 | : TypeInfo::Integer32(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1193 | } |
| 1194 | case Token::BIT_OR: { |
| 1195 | // Oring with negative Smis will give you a Smi. |
| 1196 | if (right.is_constant() && right.handle()->IsSmi() && |
| 1197 | Smi::cast(*right.handle())->value() < 0) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1198 | return TypeInfo::Smi(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1199 | } else if (left.is_constant() && left.handle()->IsSmi() && |
| 1200 | Smi::cast(*left.handle())->value() < 0) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1201 | return TypeInfo::Smi(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1202 | } |
| 1203 | return (operands_type.IsSmi()) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1204 | ? TypeInfo::Smi() |
| 1205 | : TypeInfo::Integer32(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1206 | } |
| 1207 | case Token::BIT_XOR: |
| 1208 | // Result is always a 32 bit integer. Smi property of inputs is preserved. |
| 1209 | return (operands_type.IsSmi()) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1210 | ? TypeInfo::Smi() |
| 1211 | : TypeInfo::Integer32(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1212 | case Token::SAR: |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1213 | if (left.is_smi()) return TypeInfo::Smi(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1214 | // Result is a smi if we shift by a constant >= 1, otherwise an integer32. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1215 | // Shift amount is masked with 0x1F (ECMA standard 11.7.2). |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1216 | return (right.is_constant() && right.handle()->IsSmi() |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1217 | && (Smi::cast(*right.handle())->value() & 0x1F) >= 1) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1218 | ? TypeInfo::Smi() |
| 1219 | : TypeInfo::Integer32(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1220 | case Token::SHR: |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1221 | // Result is a smi if we shift by a constant >= 2, an integer32 if |
| 1222 | // we shift by 1, and an unsigned 32-bit integer if we shift by 0. |
| 1223 | if (right.is_constant() && right.handle()->IsSmi()) { |
| 1224 | int shift_amount = Smi::cast(*right.handle())->value() & 0x1F; |
| 1225 | if (shift_amount > 1) { |
| 1226 | return TypeInfo::Smi(); |
| 1227 | } else if (shift_amount > 0) { |
| 1228 | return TypeInfo::Integer32(); |
| 1229 | } |
| 1230 | } |
| 1231 | return TypeInfo::Number(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1232 | case Token::ADD: |
| 1233 | if (operands_type.IsSmi()) { |
| 1234 | // The Integer32 range is big enough to take the sum of any two Smis. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1235 | return TypeInfo::Integer32(); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1236 | } else if (operands_type.IsNumber()) { |
| 1237 | return TypeInfo::Number(); |
| 1238 | } else if (left.type_info().IsString() || right.type_info().IsString()) { |
| 1239 | return TypeInfo::String(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1240 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1241 | return TypeInfo::Unknown(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1242 | } |
| 1243 | case Token::SHL: |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1244 | return TypeInfo::Integer32(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1245 | case Token::SUB: |
| 1246 | // The Integer32 range is big enough to take the difference of any two |
| 1247 | // Smis. |
| 1248 | return (operands_type.IsSmi()) ? |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1249 | TypeInfo::Integer32() : |
| 1250 | TypeInfo::Number(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1251 | case Token::MUL: |
| 1252 | case Token::DIV: |
| 1253 | case Token::MOD: |
| 1254 | // Result is always a number. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1255 | return TypeInfo::Number(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1256 | default: |
| 1257 | UNREACHABLE(); |
| 1258 | } |
| 1259 | UNREACHABLE(); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1260 | return TypeInfo::Unknown(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1261 | } |
| 1262 | |
| 1263 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1264 | void CodeGenerator::GenericBinaryOperation(BinaryOperation* expr, |
| 1265 | OverwriteMode overwrite_mode) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1266 | Comment cmnt(masm_, "[ BinaryOperation"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1267 | Token::Value op = expr->op(); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1268 | Comment cmnt_token(masm_, Token::String(op)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1269 | |
| 1270 | if (op == Token::COMMA) { |
| 1271 | // Simply discard left value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1272 | frame_->Nip(1); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1273 | return; |
| 1274 | } |
| 1275 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1276 | Result right = frame_->Pop(); |
| 1277 | Result left = frame_->Pop(); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 1278 | |
| 1279 | if (op == Token::ADD) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1280 | const bool left_is_string = left.type_info().IsString(); |
| 1281 | const bool right_is_string = right.type_info().IsString(); |
| 1282 | // Make sure constant strings have string type info. |
| 1283 | ASSERT(!(left.is_constant() && left.handle()->IsString()) || |
| 1284 | left_is_string); |
| 1285 | ASSERT(!(right.is_constant() && right.handle()->IsString()) || |
| 1286 | right_is_string); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 1287 | if (left_is_string || right_is_string) { |
| 1288 | frame_->Push(&left); |
| 1289 | frame_->Push(&right); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 1290 | Result answer; |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 1291 | if (left_is_string) { |
| 1292 | if (right_is_string) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1293 | StringAddStub stub(NO_STRING_CHECK_IN_STUB); |
| 1294 | answer = frame_->CallStub(&stub, 2); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 1295 | } else { |
| 1296 | answer = |
| 1297 | frame_->InvokeBuiltin(Builtins::STRING_ADD_LEFT, CALL_FUNCTION, 2); |
| 1298 | } |
| 1299 | } else if (right_is_string) { |
| 1300 | answer = |
| 1301 | frame_->InvokeBuiltin(Builtins::STRING_ADD_RIGHT, CALL_FUNCTION, 2); |
| 1302 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1303 | answer.set_type_info(TypeInfo::String()); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 1304 | frame_->Push(&answer); |
| 1305 | return; |
| 1306 | } |
| 1307 | // Neither operand is known to be a string. |
| 1308 | } |
| 1309 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1310 | bool left_is_smi_constant = left.is_constant() && left.handle()->IsSmi(); |
| 1311 | bool left_is_non_smi_constant = left.is_constant() && !left.handle()->IsSmi(); |
| 1312 | bool right_is_smi_constant = right.is_constant() && right.handle()->IsSmi(); |
| 1313 | bool right_is_non_smi_constant = |
| 1314 | right.is_constant() && !right.handle()->IsSmi(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1315 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1316 | if (left_is_smi_constant && right_is_smi_constant) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1317 | // Compute the constant result at compile time, and leave it on the frame. |
| 1318 | int left_int = Smi::cast(*left.handle())->value(); |
| 1319 | int right_int = Smi::cast(*right.handle())->value(); |
| 1320 | if (FoldConstantSmis(op, left_int, right_int)) return; |
| 1321 | } |
| 1322 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1323 | // Get number type of left and right sub-expressions. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1324 | TypeInfo operands_type = |
| 1325 | TypeInfo::Combine(left.type_info(), right.type_info()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1326 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1327 | TypeInfo result_type = CalculateTypeInfo(operands_type, op, right, left); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1328 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1329 | Result answer; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1330 | if (left_is_non_smi_constant || right_is_non_smi_constant) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1331 | // Go straight to the slow case, with no smi code. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1332 | GenericBinaryOpStub stub(op, |
| 1333 | overwrite_mode, |
| 1334 | NO_SMI_CODE_IN_STUB, |
| 1335 | operands_type); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1336 | answer = stub.GenerateCall(masm_, frame_, &left, &right); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1337 | } else if (right_is_smi_constant) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1338 | answer = ConstantSmiBinaryOperation(expr, &left, right.handle(), |
| 1339 | false, overwrite_mode); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1340 | } else if (left_is_smi_constant) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1341 | answer = ConstantSmiBinaryOperation(expr, &right, left.handle(), |
| 1342 | true, overwrite_mode); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1343 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1344 | // Set the flags based on the operation, type and loop nesting level. |
| 1345 | // Bit operations always assume they likely operate on Smis. Still only |
| 1346 | // generate the inline Smi check code if this operation is part of a loop. |
| 1347 | // For all other operations only inline the Smi check code for likely smis |
| 1348 | // if the operation is part of a loop. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1349 | if (loop_nesting() > 0 && |
| 1350 | (Token::IsBitOp(op) || |
| 1351 | operands_type.IsInteger32() || |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1352 | expr->type()->IsLikelySmi())) { |
| 1353 | answer = LikelySmiBinaryOperation(expr, &left, &right, overwrite_mode); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1354 | } else { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1355 | GenericBinaryOpStub stub(op, |
| 1356 | overwrite_mode, |
| 1357 | NO_GENERIC_BINARY_FLAGS, |
| 1358 | operands_type); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1359 | answer = stub.GenerateCall(masm_, frame_, &left, &right); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1360 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1361 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1362 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1363 | answer.set_type_info(result_type); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1364 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1368 | bool CodeGenerator::FoldConstantSmis(Token::Value op, int left, int right) { |
| 1369 | Object* answer_object = Heap::undefined_value(); |
| 1370 | switch (op) { |
| 1371 | case Token::ADD: |
| 1372 | if (Smi::IsValid(left + right)) { |
| 1373 | answer_object = Smi::FromInt(left + right); |
| 1374 | } |
| 1375 | break; |
| 1376 | case Token::SUB: |
| 1377 | if (Smi::IsValid(left - right)) { |
| 1378 | answer_object = Smi::FromInt(left - right); |
| 1379 | } |
| 1380 | break; |
| 1381 | case Token::MUL: { |
| 1382 | double answer = static_cast<double>(left) * right; |
| 1383 | if (answer >= Smi::kMinValue && answer <= Smi::kMaxValue) { |
| 1384 | // If the product is zero and the non-zero factor is negative, |
| 1385 | // the spec requires us to return floating point negative zero. |
| 1386 | if (answer != 0 || (left >= 0 && right >= 0)) { |
| 1387 | answer_object = Smi::FromInt(static_cast<int>(answer)); |
| 1388 | } |
| 1389 | } |
| 1390 | } |
| 1391 | break; |
| 1392 | case Token::DIV: |
| 1393 | case Token::MOD: |
| 1394 | break; |
| 1395 | case Token::BIT_OR: |
| 1396 | answer_object = Smi::FromInt(left | right); |
| 1397 | break; |
| 1398 | case Token::BIT_AND: |
| 1399 | answer_object = Smi::FromInt(left & right); |
| 1400 | break; |
| 1401 | case Token::BIT_XOR: |
| 1402 | answer_object = Smi::FromInt(left ^ right); |
| 1403 | break; |
| 1404 | |
| 1405 | case Token::SHL: { |
| 1406 | int shift_amount = right & 0x1F; |
| 1407 | if (Smi::IsValid(left << shift_amount)) { |
| 1408 | answer_object = Smi::FromInt(left << shift_amount); |
| 1409 | } |
| 1410 | break; |
| 1411 | } |
| 1412 | case Token::SHR: { |
| 1413 | int shift_amount = right & 0x1F; |
| 1414 | unsigned int unsigned_left = left; |
| 1415 | unsigned_left >>= shift_amount; |
| 1416 | if (unsigned_left <= static_cast<unsigned int>(Smi::kMaxValue)) { |
| 1417 | answer_object = Smi::FromInt(unsigned_left); |
| 1418 | } |
| 1419 | break; |
| 1420 | } |
| 1421 | case Token::SAR: { |
| 1422 | int shift_amount = right & 0x1F; |
| 1423 | unsigned int unsigned_left = left; |
| 1424 | if (left < 0) { |
| 1425 | // Perform arithmetic shift of a negative number by |
| 1426 | // complementing number, logical shifting, complementing again. |
| 1427 | unsigned_left = ~unsigned_left; |
| 1428 | unsigned_left >>= shift_amount; |
| 1429 | unsigned_left = ~unsigned_left; |
| 1430 | } else { |
| 1431 | unsigned_left >>= shift_amount; |
| 1432 | } |
| 1433 | ASSERT(Smi::IsValid(unsigned_left)); // Converted to signed. |
| 1434 | answer_object = Smi::FromInt(unsigned_left); // Converted to signed. |
| 1435 | break; |
| 1436 | } |
| 1437 | default: |
| 1438 | UNREACHABLE(); |
| 1439 | break; |
| 1440 | } |
| 1441 | if (answer_object == Heap::undefined_value()) { |
| 1442 | return false; |
| 1443 | } |
| 1444 | frame_->Push(Handle<Object>(answer_object)); |
| 1445 | return true; |
| 1446 | } |
| 1447 | |
| 1448 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1449 | static void CheckTwoForSminess(MacroAssembler* masm, |
| 1450 | Register left, Register right, Register scratch, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1451 | TypeInfo left_info, TypeInfo right_info, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1452 | DeferredInlineBinaryOperation* deferred); |
| 1453 | |
| 1454 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1455 | // Implements a binary operation using a deferred code object and some |
| 1456 | // inline code to operate on smis quickly. |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1457 | Result CodeGenerator::LikelySmiBinaryOperation(BinaryOperation* expr, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1458 | Result* left, |
| 1459 | Result* right, |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1460 | OverwriteMode overwrite_mode) { |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1461 | // Copy the type info because left and right may be overwritten. |
| 1462 | TypeInfo left_type_info = left->type_info(); |
| 1463 | TypeInfo right_type_info = right->type_info(); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1464 | Token::Value op = expr->op(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1465 | Result answer; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1466 | // Special handling of div and mod because they use fixed registers. |
| 1467 | if (op == Token::DIV || op == Token::MOD) { |
| 1468 | // We need eax as the quotient register, edx as the remainder |
| 1469 | // register, neither left nor right in eax or edx, and left copied |
| 1470 | // to eax. |
| 1471 | Result quotient; |
| 1472 | Result remainder; |
| 1473 | bool left_is_in_eax = false; |
| 1474 | // Step 1: get eax for quotient. |
| 1475 | if ((left->is_register() && left->reg().is(eax)) || |
| 1476 | (right->is_register() && right->reg().is(eax))) { |
| 1477 | // One or both is in eax. Use a fresh non-edx register for |
| 1478 | // them. |
| 1479 | Result fresh = allocator_->Allocate(); |
| 1480 | ASSERT(fresh.is_valid()); |
| 1481 | if (fresh.reg().is(edx)) { |
| 1482 | remainder = fresh; |
| 1483 | fresh = allocator_->Allocate(); |
| 1484 | ASSERT(fresh.is_valid()); |
| 1485 | } |
| 1486 | if (left->is_register() && left->reg().is(eax)) { |
| 1487 | quotient = *left; |
| 1488 | *left = fresh; |
| 1489 | left_is_in_eax = true; |
| 1490 | } |
| 1491 | if (right->is_register() && right->reg().is(eax)) { |
| 1492 | quotient = *right; |
| 1493 | *right = fresh; |
| 1494 | } |
| 1495 | __ mov(fresh.reg(), eax); |
| 1496 | } else { |
| 1497 | // Neither left nor right is in eax. |
| 1498 | quotient = allocator_->Allocate(eax); |
| 1499 | } |
| 1500 | ASSERT(quotient.is_register() && quotient.reg().is(eax)); |
| 1501 | ASSERT(!(left->is_register() && left->reg().is(eax))); |
| 1502 | ASSERT(!(right->is_register() && right->reg().is(eax))); |
| 1503 | |
| 1504 | // Step 2: get edx for remainder if necessary. |
| 1505 | if (!remainder.is_valid()) { |
| 1506 | if ((left->is_register() && left->reg().is(edx)) || |
| 1507 | (right->is_register() && right->reg().is(edx))) { |
| 1508 | Result fresh = allocator_->Allocate(); |
| 1509 | ASSERT(fresh.is_valid()); |
| 1510 | if (left->is_register() && left->reg().is(edx)) { |
| 1511 | remainder = *left; |
| 1512 | *left = fresh; |
| 1513 | } |
| 1514 | if (right->is_register() && right->reg().is(edx)) { |
| 1515 | remainder = *right; |
| 1516 | *right = fresh; |
| 1517 | } |
| 1518 | __ mov(fresh.reg(), edx); |
| 1519 | } else { |
| 1520 | // Neither left nor right is in edx. |
| 1521 | remainder = allocator_->Allocate(edx); |
| 1522 | } |
| 1523 | } |
| 1524 | ASSERT(remainder.is_register() && remainder.reg().is(edx)); |
| 1525 | ASSERT(!(left->is_register() && left->reg().is(edx))); |
| 1526 | ASSERT(!(right->is_register() && right->reg().is(edx))); |
| 1527 | |
| 1528 | left->ToRegister(); |
| 1529 | right->ToRegister(); |
| 1530 | frame_->Spill(eax); |
| 1531 | frame_->Spill(edx); |
| 1532 | |
| 1533 | // Check that left and right are smi tagged. |
| 1534 | DeferredInlineBinaryOperation* deferred = |
| 1535 | new DeferredInlineBinaryOperation(op, |
| 1536 | (op == Token::DIV) ? eax : edx, |
| 1537 | left->reg(), |
| 1538 | right->reg(), |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1539 | left_type_info, |
| 1540 | right_type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1541 | overwrite_mode); |
| 1542 | if (left->reg().is(right->reg())) { |
| 1543 | __ test(left->reg(), Immediate(kSmiTagMask)); |
| 1544 | } else { |
| 1545 | // Use the quotient register as a scratch for the tag check. |
| 1546 | if (!left_is_in_eax) __ mov(eax, left->reg()); |
| 1547 | left_is_in_eax = false; // About to destroy the value in eax. |
| 1548 | __ or_(eax, Operand(right->reg())); |
| 1549 | ASSERT(kSmiTag == 0); // Adjust test if not the case. |
| 1550 | __ test(eax, Immediate(kSmiTagMask)); |
| 1551 | } |
| 1552 | deferred->Branch(not_zero); |
| 1553 | |
| 1554 | if (!left_is_in_eax) __ mov(eax, left->reg()); |
| 1555 | // Sign extend eax into edx:eax. |
| 1556 | __ cdq(); |
| 1557 | // Check for 0 divisor. |
| 1558 | __ test(right->reg(), Operand(right->reg())); |
| 1559 | deferred->Branch(zero); |
| 1560 | // Divide edx:eax by the right operand. |
| 1561 | __ idiv(right->reg()); |
| 1562 | |
| 1563 | // Complete the operation. |
| 1564 | if (op == Token::DIV) { |
| 1565 | // Check for negative zero result. If result is zero, and divisor |
| 1566 | // is negative, return a floating point negative zero. The |
| 1567 | // virtual frame is unchanged in this block, so local control flow |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1568 | // can use a Label rather than a JumpTarget. If the context of this |
| 1569 | // expression will treat -0 like 0, do not do this test. |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1570 | if (!expr->no_negative_zero()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1571 | Label non_zero_result; |
| 1572 | __ test(left->reg(), Operand(left->reg())); |
| 1573 | __ j(not_zero, &non_zero_result); |
| 1574 | __ test(right->reg(), Operand(right->reg())); |
| 1575 | deferred->Branch(negative); |
| 1576 | __ bind(&non_zero_result); |
| 1577 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1578 | // Check for the corner case of dividing the most negative smi by |
| 1579 | // -1. We cannot use the overflow flag, since it is not set by |
| 1580 | // idiv instruction. |
| 1581 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 1582 | __ cmp(eax, 0x40000000); |
| 1583 | deferred->Branch(equal); |
| 1584 | // Check that the remainder is zero. |
| 1585 | __ test(edx, Operand(edx)); |
| 1586 | deferred->Branch(not_zero); |
| 1587 | // Tag the result and store it in the quotient register. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1588 | __ SmiTag(eax); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1589 | deferred->BindExit(); |
| 1590 | left->Unuse(); |
| 1591 | right->Unuse(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1592 | answer = quotient; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1593 | } else { |
| 1594 | ASSERT(op == Token::MOD); |
| 1595 | // Check for a negative zero result. If the result is zero, and |
| 1596 | // the dividend is negative, return a floating point negative |
| 1597 | // zero. The frame is unchanged in this block, so local control |
| 1598 | // flow can use a Label rather than a JumpTarget. |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1599 | if (!expr->no_negative_zero()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1600 | Label non_zero_result; |
| 1601 | __ test(edx, Operand(edx)); |
| 1602 | __ j(not_zero, &non_zero_result, taken); |
| 1603 | __ test(left->reg(), Operand(left->reg())); |
| 1604 | deferred->Branch(negative); |
| 1605 | __ bind(&non_zero_result); |
| 1606 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1607 | deferred->BindExit(); |
| 1608 | left->Unuse(); |
| 1609 | right->Unuse(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1610 | answer = remainder; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1611 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1612 | ASSERT(answer.is_valid()); |
| 1613 | return answer; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | // Special handling of shift operations because they use fixed |
| 1617 | // registers. |
| 1618 | if (op == Token::SHL || op == Token::SHR || op == Token::SAR) { |
| 1619 | // Move left out of ecx if necessary. |
| 1620 | if (left->is_register() && left->reg().is(ecx)) { |
| 1621 | *left = allocator_->Allocate(); |
| 1622 | ASSERT(left->is_valid()); |
| 1623 | __ mov(left->reg(), ecx); |
| 1624 | } |
| 1625 | right->ToRegister(ecx); |
| 1626 | left->ToRegister(); |
| 1627 | ASSERT(left->is_register() && !left->reg().is(ecx)); |
| 1628 | ASSERT(right->is_register() && right->reg().is(ecx)); |
| 1629 | |
| 1630 | // We will modify right, it must be spilled. |
| 1631 | frame_->Spill(ecx); |
| 1632 | |
| 1633 | // Use a fresh answer register to avoid spilling the left operand. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1634 | answer = allocator_->Allocate(); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1635 | ASSERT(answer.is_valid()); |
| 1636 | // Check that both operands are smis using the answer register as a |
| 1637 | // temporary. |
| 1638 | DeferredInlineBinaryOperation* deferred = |
| 1639 | new DeferredInlineBinaryOperation(op, |
| 1640 | answer.reg(), |
| 1641 | left->reg(), |
| 1642 | ecx, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1643 | left_type_info, |
| 1644 | right_type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1645 | overwrite_mode); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1646 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1647 | Label do_op, left_nonsmi; |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1648 | // If right is a smi we make a fast case if left is either a smi |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1649 | // or a heapnumber. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1650 | if (CpuFeatures::IsSupported(SSE2) && right_type_info.IsSmi()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1651 | CpuFeatures::Scope use_sse2(SSE2); |
| 1652 | __ mov(answer.reg(), left->reg()); |
| 1653 | // Fast case - both are actually smis. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1654 | if (!left_type_info.IsSmi()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1655 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 1656 | __ j(not_zero, &left_nonsmi); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1657 | } else { |
| 1658 | if (FLAG_debug_code) __ AbortIfNotSmi(left->reg()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1659 | } |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 1660 | if (FLAG_debug_code) __ AbortIfNotSmi(right->reg()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1661 | __ SmiUntag(answer.reg()); |
| 1662 | __ jmp(&do_op); |
| 1663 | |
| 1664 | __ bind(&left_nonsmi); |
| 1665 | // Branch if not a heapnumber. |
| 1666 | __ cmp(FieldOperand(answer.reg(), HeapObject::kMapOffset), |
| 1667 | Factory::heap_number_map()); |
| 1668 | deferred->Branch(not_equal); |
| 1669 | |
| 1670 | // Load integer value into answer register using truncation. |
| 1671 | __ cvttsd2si(answer.reg(), |
| 1672 | FieldOperand(answer.reg(), HeapNumber::kValueOffset)); |
| 1673 | // Branch if we do not fit in a smi. |
| 1674 | __ cmp(answer.reg(), 0xc0000000); |
| 1675 | deferred->Branch(negative); |
| 1676 | } else { |
| 1677 | CheckTwoForSminess(masm_, left->reg(), right->reg(), answer.reg(), |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1678 | left_type_info, right_type_info, deferred); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1679 | |
| 1680 | // Untag both operands. |
| 1681 | __ mov(answer.reg(), left->reg()); |
| 1682 | __ SmiUntag(answer.reg()); |
| 1683 | } |
| 1684 | |
| 1685 | __ bind(&do_op); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1686 | __ SmiUntag(ecx); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1687 | // Perform the operation. |
| 1688 | switch (op) { |
| 1689 | case Token::SAR: |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1690 | __ sar_cl(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1691 | // No checks of result necessary |
| 1692 | break; |
| 1693 | case Token::SHR: { |
| 1694 | Label result_ok; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1695 | __ shr_cl(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1696 | // Check that the *unsigned* result fits in a smi. Neither of |
| 1697 | // the two high-order bits can be set: |
| 1698 | // * 0x80000000: high bit would be lost when smi tagging. |
| 1699 | // * 0x40000000: this number would convert to negative when smi |
| 1700 | // tagging. |
| 1701 | // These two cases can only happen with shifts by 0 or 1 when |
| 1702 | // handed a valid smi. If the answer cannot be represented by a |
| 1703 | // smi, restore the left and right arguments, and jump to slow |
| 1704 | // case. The low bit of the left argument may be lost, but only |
| 1705 | // in a case where it is dropped anyway. |
| 1706 | __ test(answer.reg(), Immediate(0xc0000000)); |
| 1707 | __ j(zero, &result_ok); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1708 | __ SmiTag(ecx); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1709 | deferred->Jump(); |
| 1710 | __ bind(&result_ok); |
| 1711 | break; |
| 1712 | } |
| 1713 | case Token::SHL: { |
| 1714 | Label result_ok; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1715 | __ shl_cl(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1716 | // Check that the *signed* result fits in a smi. |
| 1717 | __ cmp(answer.reg(), 0xc0000000); |
| 1718 | __ j(positive, &result_ok); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1719 | __ SmiTag(ecx); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1720 | deferred->Jump(); |
| 1721 | __ bind(&result_ok); |
| 1722 | break; |
| 1723 | } |
| 1724 | default: |
| 1725 | UNREACHABLE(); |
| 1726 | } |
| 1727 | // Smi-tag the result in answer. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1728 | __ SmiTag(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1729 | deferred->BindExit(); |
| 1730 | left->Unuse(); |
| 1731 | right->Unuse(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1732 | ASSERT(answer.is_valid()); |
| 1733 | return answer; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1734 | } |
| 1735 | |
| 1736 | // Handle the other binary operations. |
| 1737 | left->ToRegister(); |
| 1738 | right->ToRegister(); |
| 1739 | // A newly allocated register answer is used to hold the answer. The |
| 1740 | // registers containing left and right are not modified so they don't |
| 1741 | // need to be spilled in the fast case. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1742 | answer = allocator_->Allocate(); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1743 | ASSERT(answer.is_valid()); |
| 1744 | |
| 1745 | // Perform the smi tag check. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1746 | DeferredInlineBinaryOperation* deferred = |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1747 | new DeferredInlineBinaryOperation(op, |
| 1748 | answer.reg(), |
| 1749 | left->reg(), |
| 1750 | right->reg(), |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1751 | left_type_info, |
| 1752 | right_type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1753 | overwrite_mode); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1754 | CheckTwoForSminess(masm_, left->reg(), right->reg(), answer.reg(), |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1755 | left_type_info, right_type_info, deferred); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1756 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1757 | __ mov(answer.reg(), left->reg()); |
| 1758 | switch (op) { |
| 1759 | case Token::ADD: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1760 | __ add(answer.reg(), Operand(right->reg())); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1761 | deferred->Branch(overflow); |
| 1762 | break; |
| 1763 | |
| 1764 | case Token::SUB: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1765 | __ sub(answer.reg(), Operand(right->reg())); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1766 | deferred->Branch(overflow); |
| 1767 | break; |
| 1768 | |
| 1769 | case Token::MUL: { |
| 1770 | // If the smi tag is 0 we can just leave the tag on one operand. |
| 1771 | ASSERT(kSmiTag == 0); // Adjust code below if not the case. |
| 1772 | // Remove smi tag from the left operand (but keep sign). |
| 1773 | // Left-hand operand has been copied into answer. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 1774 | __ SmiUntag(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1775 | // Do multiplication of smis, leaving result in answer. |
| 1776 | __ imul(answer.reg(), Operand(right->reg())); |
| 1777 | // Go slow on overflows. |
| 1778 | deferred->Branch(overflow); |
| 1779 | // Check for negative zero result. If product is zero, and one |
| 1780 | // argument is negative, go to slow case. The frame is unchanged |
| 1781 | // in this block, so local control flow can use a Label rather |
| 1782 | // than a JumpTarget. |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1783 | if (!expr->no_negative_zero()) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 1784 | Label non_zero_result; |
| 1785 | __ test(answer.reg(), Operand(answer.reg())); |
| 1786 | __ j(not_zero, &non_zero_result, taken); |
| 1787 | __ mov(answer.reg(), left->reg()); |
| 1788 | __ or_(answer.reg(), Operand(right->reg())); |
| 1789 | deferred->Branch(negative); |
| 1790 | __ xor_(answer.reg(), Operand(answer.reg())); // Positive 0 is correct. |
| 1791 | __ bind(&non_zero_result); |
| 1792 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1793 | break; |
| 1794 | } |
| 1795 | |
| 1796 | case Token::BIT_OR: |
| 1797 | __ or_(answer.reg(), Operand(right->reg())); |
| 1798 | break; |
| 1799 | |
| 1800 | case Token::BIT_AND: |
| 1801 | __ and_(answer.reg(), Operand(right->reg())); |
| 1802 | break; |
| 1803 | |
| 1804 | case Token::BIT_XOR: |
| 1805 | __ xor_(answer.reg(), Operand(right->reg())); |
| 1806 | break; |
| 1807 | |
| 1808 | default: |
| 1809 | UNREACHABLE(); |
| 1810 | break; |
| 1811 | } |
| 1812 | deferred->BindExit(); |
| 1813 | left->Unuse(); |
| 1814 | right->Unuse(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1815 | ASSERT(answer.is_valid()); |
| 1816 | return answer; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 1817 | } |
| 1818 | |
| 1819 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1820 | // Call the appropriate binary operation stub to compute src op value |
| 1821 | // and leave the result in dst. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1822 | class DeferredInlineSmiOperation: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1823 | public: |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1824 | DeferredInlineSmiOperation(Token::Value op, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1825 | Register dst, |
| 1826 | Register src, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1827 | TypeInfo type_info, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1828 | Smi* value, |
| 1829 | OverwriteMode overwrite_mode) |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1830 | : op_(op), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1831 | dst_(dst), |
| 1832 | src_(src), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1833 | type_info_(type_info), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1834 | value_(value), |
| 1835 | overwrite_mode_(overwrite_mode) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1836 | if (type_info.IsSmi()) overwrite_mode_ = NO_OVERWRITE; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1837 | set_comment("[ DeferredInlineSmiOperation"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1838 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1839 | |
| 1840 | virtual void Generate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1841 | |
| 1842 | private: |
| 1843 | Token::Value op_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1844 | Register dst_; |
| 1845 | Register src_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1846 | TypeInfo type_info_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1847 | Smi* value_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1848 | OverwriteMode overwrite_mode_; |
| 1849 | }; |
| 1850 | |
| 1851 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1852 | void DeferredInlineSmiOperation::Generate() { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1853 | // For mod we don't generate all the Smi code inline. |
| 1854 | GenericBinaryOpStub stub( |
| 1855 | op_, |
| 1856 | overwrite_mode_, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1857 | (op_ == Token::MOD) ? NO_GENERIC_BINARY_FLAGS : NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1858 | TypeInfo::Combine(TypeInfo::Smi(), type_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1859 | stub.GenerateCall(masm_, src_, value_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1860 | if (!dst_.is(eax)) __ mov(dst_, eax); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1861 | } |
| 1862 | |
| 1863 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1864 | // Call the appropriate binary operation stub to compute value op src |
| 1865 | // and leave the result in dst. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1866 | class DeferredInlineSmiOperationReversed: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1867 | public: |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1868 | DeferredInlineSmiOperationReversed(Token::Value op, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1869 | Register dst, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1870 | Smi* value, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1871 | Register src, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1872 | TypeInfo type_info, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1873 | OverwriteMode overwrite_mode) |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 1874 | : op_(op), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1875 | dst_(dst), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1876 | type_info_(type_info), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1877 | value_(value), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1878 | src_(src), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1879 | overwrite_mode_(overwrite_mode) { |
| 1880 | set_comment("[ DeferredInlineSmiOperationReversed"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1881 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1882 | |
| 1883 | virtual void Generate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1884 | |
| 1885 | private: |
| 1886 | Token::Value op_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1887 | Register dst_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1888 | TypeInfo type_info_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1889 | Smi* value_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1890 | Register src_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1891 | OverwriteMode overwrite_mode_; |
| 1892 | }; |
| 1893 | |
| 1894 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1895 | void DeferredInlineSmiOperationReversed::Generate() { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1896 | GenericBinaryOpStub igostub( |
| 1897 | op_, |
| 1898 | overwrite_mode_, |
| 1899 | NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1900 | TypeInfo::Combine(TypeInfo::Smi(), type_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1901 | igostub.GenerateCall(masm_, value_, src_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1902 | if (!dst_.is(eax)) __ mov(dst_, eax); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1903 | } |
| 1904 | |
| 1905 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1906 | // The result of src + value is in dst. It either overflowed or was not |
| 1907 | // smi tagged. Undo the speculative addition and call the appropriate |
| 1908 | // specialized stub for add. The result is left in dst. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1909 | class DeferredInlineSmiAdd: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1910 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1911 | DeferredInlineSmiAdd(Register dst, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1912 | TypeInfo type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1913 | Smi* value, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1914 | OverwriteMode overwrite_mode) |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1915 | : dst_(dst), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1916 | type_info_(type_info), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1917 | value_(value), |
| 1918 | overwrite_mode_(overwrite_mode) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1919 | if (type_info_.IsSmi()) overwrite_mode_ = NO_OVERWRITE; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1920 | set_comment("[ DeferredInlineSmiAdd"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1921 | } |
| 1922 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1923 | virtual void Generate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1924 | |
| 1925 | private: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1926 | Register dst_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1927 | TypeInfo type_info_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1928 | Smi* value_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1929 | OverwriteMode overwrite_mode_; |
| 1930 | }; |
| 1931 | |
| 1932 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1933 | void DeferredInlineSmiAdd::Generate() { |
| 1934 | // Undo the optimistic add operation and call the shared stub. |
| 1935 | __ sub(Operand(dst_), Immediate(value_)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1936 | GenericBinaryOpStub igostub( |
| 1937 | Token::ADD, |
| 1938 | overwrite_mode_, |
| 1939 | NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1940 | TypeInfo::Combine(TypeInfo::Smi(), type_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1941 | igostub.GenerateCall(masm_, dst_, value_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1942 | if (!dst_.is(eax)) __ mov(dst_, eax); |
| 1943 | } |
| 1944 | |
| 1945 | |
| 1946 | // The result of value + src is in dst. It either overflowed or was not |
| 1947 | // smi tagged. Undo the speculative addition and call the appropriate |
| 1948 | // specialized stub for add. The result is left in dst. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1949 | class DeferredInlineSmiAddReversed: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1950 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1951 | DeferredInlineSmiAddReversed(Register dst, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1952 | TypeInfo type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1953 | Smi* value, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1954 | OverwriteMode overwrite_mode) |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1955 | : dst_(dst), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1956 | type_info_(type_info), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1957 | value_(value), |
| 1958 | overwrite_mode_(overwrite_mode) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1959 | set_comment("[ DeferredInlineSmiAddReversed"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1960 | } |
| 1961 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1962 | virtual void Generate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1963 | |
| 1964 | private: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1965 | Register dst_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1966 | TypeInfo type_info_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1967 | Smi* value_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1968 | OverwriteMode overwrite_mode_; |
| 1969 | }; |
| 1970 | |
| 1971 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1972 | void DeferredInlineSmiAddReversed::Generate() { |
| 1973 | // Undo the optimistic add operation and call the shared stub. |
| 1974 | __ sub(Operand(dst_), Immediate(value_)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1975 | GenericBinaryOpStub igostub( |
| 1976 | Token::ADD, |
| 1977 | overwrite_mode_, |
| 1978 | NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1979 | TypeInfo::Combine(TypeInfo::Smi(), type_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1980 | igostub.GenerateCall(masm_, value_, dst_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1981 | if (!dst_.is(eax)) __ mov(dst_, eax); |
| 1982 | } |
| 1983 | |
| 1984 | |
| 1985 | // The result of src - value is in dst. It either overflowed or was not |
| 1986 | // smi tagged. Undo the speculative subtraction and call the |
| 1987 | // appropriate specialized stub for subtract. The result is left in |
| 1988 | // dst. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1989 | class DeferredInlineSmiSub: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1990 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1991 | DeferredInlineSmiSub(Register dst, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1992 | TypeInfo type_info, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1993 | Smi* value, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1994 | OverwriteMode overwrite_mode) |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1995 | : dst_(dst), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1996 | type_info_(type_info), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1997 | value_(value), |
| 1998 | overwrite_mode_(overwrite_mode) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 1999 | if (type_info.IsSmi()) overwrite_mode_ = NO_OVERWRITE; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2000 | set_comment("[ DeferredInlineSmiSub"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2001 | } |
| 2002 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2003 | virtual void Generate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2004 | |
| 2005 | private: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2006 | Register dst_; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2007 | TypeInfo type_info_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2008 | Smi* value_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2009 | OverwriteMode overwrite_mode_; |
| 2010 | }; |
| 2011 | |
| 2012 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2013 | void DeferredInlineSmiSub::Generate() { |
| 2014 | // Undo the optimistic sub operation and call the shared stub. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2015 | __ add(Operand(dst_), Immediate(value_)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2016 | GenericBinaryOpStub igostub( |
| 2017 | Token::SUB, |
| 2018 | overwrite_mode_, |
| 2019 | NO_SMI_CODE_IN_STUB, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2020 | TypeInfo::Combine(TypeInfo::Smi(), type_info_)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2021 | igostub.GenerateCall(masm_, dst_, value_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2022 | if (!dst_.is(eax)) __ mov(dst_, eax); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2023 | } |
| 2024 | |
| 2025 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2026 | Result CodeGenerator::ConstantSmiBinaryOperation(BinaryOperation* expr, |
| 2027 | Result* operand, |
| 2028 | Handle<Object> value, |
| 2029 | bool reversed, |
| 2030 | OverwriteMode overwrite_mode) { |
| 2031 | // Generate inline code for a binary operation when one of the |
| 2032 | // operands is a constant smi. Consumes the argument "operand". |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2033 | if (IsUnsafeSmi(value)) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2034 | Result unsafe_operand(value); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2035 | if (reversed) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2036 | return LikelySmiBinaryOperation(expr, &unsafe_operand, operand, |
| 2037 | overwrite_mode); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2038 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2039 | return LikelySmiBinaryOperation(expr, operand, &unsafe_operand, |
| 2040 | overwrite_mode); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2041 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2042 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2043 | |
| 2044 | // Get the literal value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2045 | Smi* smi_value = Smi::cast(*value); |
| 2046 | int int_value = smi_value->value(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2047 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2048 | Token::Value op = expr->op(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2049 | Result answer; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2050 | switch (op) { |
| 2051 | case Token::ADD: { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2052 | operand->ToRegister(); |
| 2053 | frame_->Spill(operand->reg()); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2054 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2055 | // Optimistically add. Call the specialized add stub if the |
| 2056 | // result is not a smi or overflows. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2057 | DeferredCode* deferred = NULL; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2058 | if (reversed) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2059 | deferred = new DeferredInlineSmiAddReversed(operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2060 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2061 | smi_value, |
| 2062 | overwrite_mode); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2063 | } else { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2064 | deferred = new DeferredInlineSmiAdd(operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2065 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2066 | smi_value, |
| 2067 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2068 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2069 | __ add(Operand(operand->reg()), Immediate(value)); |
| 2070 | deferred->Branch(overflow); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2071 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2072 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2073 | deferred->Branch(not_zero); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2074 | } else if (FLAG_debug_code) { |
| 2075 | __ AbortIfNotSmi(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2076 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2077 | deferred->BindExit(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2078 | answer = *operand; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2079 | break; |
| 2080 | } |
| 2081 | |
| 2082 | case Token::SUB: { |
| 2083 | DeferredCode* deferred = NULL; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2084 | if (reversed) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2085 | // The reversed case is only hit when the right operand is not a |
| 2086 | // constant. |
| 2087 | ASSERT(operand->is_register()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2088 | answer = allocator()->Allocate(); |
| 2089 | ASSERT(answer.is_valid()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2090 | __ Set(answer.reg(), Immediate(value)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2091 | deferred = |
| 2092 | new DeferredInlineSmiOperationReversed(op, |
| 2093 | answer.reg(), |
| 2094 | smi_value, |
| 2095 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2096 | operand->type_info(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2097 | overwrite_mode); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2098 | __ sub(answer.reg(), Operand(operand->reg())); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2099 | } else { |
| 2100 | operand->ToRegister(); |
| 2101 | frame_->Spill(operand->reg()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2102 | answer = *operand; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2103 | deferred = new DeferredInlineSmiSub(operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2104 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2105 | smi_value, |
| 2106 | overwrite_mode); |
| 2107 | __ sub(Operand(operand->reg()), Immediate(value)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2108 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2109 | deferred->Branch(overflow); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2110 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2111 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 2112 | deferred->Branch(not_zero); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2113 | } else if (FLAG_debug_code) { |
| 2114 | __ AbortIfNotSmi(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2115 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2116 | deferred->BindExit(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2117 | operand->Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2118 | break; |
| 2119 | } |
| 2120 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2121 | case Token::SAR: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2122 | if (reversed) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2123 | Result constant_operand(value); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2124 | answer = LikelySmiBinaryOperation(expr, &constant_operand, operand, |
| 2125 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2126 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2127 | // Only the least significant 5 bits of the shift value are used. |
| 2128 | // In the slow case, this masking is done inside the runtime call. |
| 2129 | int shift_value = int_value & 0x1f; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2130 | operand->ToRegister(); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2131 | frame_->Spill(operand->reg()); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2132 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2133 | DeferredInlineSmiOperation* deferred = |
| 2134 | new DeferredInlineSmiOperation(op, |
| 2135 | operand->reg(), |
| 2136 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2137 | operand->type_info(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2138 | smi_value, |
| 2139 | overwrite_mode); |
| 2140 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2141 | deferred->Branch(not_zero); |
| 2142 | if (shift_value > 0) { |
| 2143 | __ sar(operand->reg(), shift_value); |
| 2144 | __ and_(operand->reg(), ~kSmiTagMask); |
| 2145 | } |
| 2146 | deferred->BindExit(); |
| 2147 | } else { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2148 | if (FLAG_debug_code) { |
| 2149 | __ AbortIfNotSmi(operand->reg()); |
| 2150 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2151 | if (shift_value > 0) { |
| 2152 | __ sar(operand->reg(), shift_value); |
| 2153 | __ and_(operand->reg(), ~kSmiTagMask); |
| 2154 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2155 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2156 | answer = *operand; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2157 | } |
| 2158 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2159 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2160 | case Token::SHR: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2161 | if (reversed) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2162 | Result constant_operand(value); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2163 | answer = LikelySmiBinaryOperation(expr, &constant_operand, operand, |
| 2164 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2165 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2166 | // Only the least significant 5 bits of the shift value are used. |
| 2167 | // In the slow case, this masking is done inside the runtime call. |
| 2168 | int shift_value = int_value & 0x1f; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2169 | operand->ToRegister(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2170 | answer = allocator()->Allocate(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2171 | ASSERT(answer.is_valid()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2172 | DeferredInlineSmiOperation* deferred = |
| 2173 | new DeferredInlineSmiOperation(op, |
| 2174 | answer.reg(), |
| 2175 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2176 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2177 | smi_value, |
| 2178 | overwrite_mode); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2179 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2180 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2181 | deferred->Branch(not_zero); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2182 | } else if (FLAG_debug_code) { |
| 2183 | __ AbortIfNotSmi(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2184 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2185 | __ mov(answer.reg(), operand->reg()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2186 | __ SmiUntag(answer.reg()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2187 | __ shr(answer.reg(), shift_value); |
| 2188 | // A negative Smi shifted right two is in the positive Smi range. |
| 2189 | if (shift_value < 2) { |
| 2190 | __ test(answer.reg(), Immediate(0xc0000000)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2191 | deferred->Branch(not_zero); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2192 | } |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2193 | operand->Unuse(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2194 | __ SmiTag(answer.reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2195 | deferred->BindExit(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2196 | } |
| 2197 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2198 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2199 | case Token::SHL: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2200 | if (reversed) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2201 | // Move operand into ecx and also into a second register. |
| 2202 | // If operand is already in a register, take advantage of that. |
| 2203 | // This lets us modify ecx, but still bail out to deferred code. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2204 | Result right; |
| 2205 | Result right_copy_in_ecx; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2206 | TypeInfo right_type_info = operand->type_info(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2207 | operand->ToRegister(); |
| 2208 | if (operand->reg().is(ecx)) { |
| 2209 | right = allocator()->Allocate(); |
| 2210 | __ mov(right.reg(), ecx); |
| 2211 | frame_->Spill(ecx); |
| 2212 | right_copy_in_ecx = *operand; |
| 2213 | } else { |
| 2214 | right_copy_in_ecx = allocator()->Allocate(ecx); |
| 2215 | __ mov(ecx, operand->reg()); |
| 2216 | right = *operand; |
| 2217 | } |
| 2218 | operand->Unuse(); |
| 2219 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2220 | answer = allocator()->Allocate(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2221 | DeferredInlineSmiOperationReversed* deferred = |
| 2222 | new DeferredInlineSmiOperationReversed(op, |
| 2223 | answer.reg(), |
| 2224 | smi_value, |
| 2225 | right.reg(), |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2226 | right_type_info, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2227 | overwrite_mode); |
| 2228 | __ mov(answer.reg(), Immediate(int_value)); |
| 2229 | __ sar(ecx, kSmiTagSize); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2230 | if (!right_type_info.IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2231 | deferred->Branch(carry); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2232 | } else if (FLAG_debug_code) { |
| 2233 | __ AbortIfNotSmi(right.reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2234 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2235 | __ shl_cl(answer.reg()); |
| 2236 | __ cmp(answer.reg(), 0xc0000000); |
| 2237 | deferred->Branch(sign); |
| 2238 | __ SmiTag(answer.reg()); |
| 2239 | |
| 2240 | deferred->BindExit(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2241 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2242 | // Only the least significant 5 bits of the shift value are used. |
| 2243 | // In the slow case, this masking is done inside the runtime call. |
| 2244 | int shift_value = int_value & 0x1f; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2245 | operand->ToRegister(); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2246 | if (shift_value == 0) { |
kasperl@chromium.org | a1db2ce | 2009-06-10 12:48:11 +0000 | [diff] [blame] | 2247 | // Spill operand so it can be overwritten in the slow case. |
| 2248 | frame_->Spill(operand->reg()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2249 | DeferredInlineSmiOperation* deferred = |
| 2250 | new DeferredInlineSmiOperation(op, |
| 2251 | operand->reg(), |
| 2252 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2253 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2254 | smi_value, |
| 2255 | overwrite_mode); |
| 2256 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2257 | deferred->Branch(not_zero); |
| 2258 | deferred->BindExit(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2259 | answer = *operand; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2260 | } else { |
| 2261 | // Use a fresh temporary for nonzero shift values. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2262 | answer = allocator()->Allocate(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2263 | ASSERT(answer.is_valid()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2264 | DeferredInlineSmiOperation* deferred = |
| 2265 | new DeferredInlineSmiOperation(op, |
| 2266 | answer.reg(), |
| 2267 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2268 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2269 | smi_value, |
| 2270 | overwrite_mode); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2271 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2272 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2273 | deferred->Branch(not_zero); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2274 | } else if (FLAG_debug_code) { |
| 2275 | __ AbortIfNotSmi(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2276 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2277 | __ mov(answer.reg(), operand->reg()); |
| 2278 | ASSERT(kSmiTag == 0); // adjust code if not the case |
| 2279 | // We do no shifts, only the Smi conversion, if shift_value is 1. |
| 2280 | if (shift_value > 1) { |
| 2281 | __ shl(answer.reg(), shift_value - 1); |
| 2282 | } |
| 2283 | // Convert int result to Smi, checking that it is in int range. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2284 | ASSERT(kSmiTagSize == 1); // adjust code if not the case |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2285 | __ add(answer.reg(), Operand(answer.reg())); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2286 | deferred->Branch(overflow); |
| 2287 | deferred->BindExit(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2288 | operand->Unuse(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2289 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2290 | } |
| 2291 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2292 | |
| 2293 | case Token::BIT_OR: |
| 2294 | case Token::BIT_XOR: |
| 2295 | case Token::BIT_AND: { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2296 | operand->ToRegister(); |
| 2297 | frame_->Spill(operand->reg()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2298 | DeferredCode* deferred = NULL; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2299 | if (reversed) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2300 | deferred = |
| 2301 | new DeferredInlineSmiOperationReversed(op, |
| 2302 | operand->reg(), |
| 2303 | smi_value, |
| 2304 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2305 | operand->type_info(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2306 | overwrite_mode); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2307 | } else { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2308 | deferred = new DeferredInlineSmiOperation(op, |
| 2309 | operand->reg(), |
| 2310 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2311 | operand->type_info(), |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2312 | smi_value, |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2313 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2314 | } |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2315 | if (!operand->type_info().IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2316 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2317 | deferred->Branch(not_zero); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2318 | } else if (FLAG_debug_code) { |
| 2319 | __ AbortIfNotSmi(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2320 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2321 | if (op == Token::BIT_AND) { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2322 | __ and_(Operand(operand->reg()), Immediate(value)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2323 | } else if (op == Token::BIT_XOR) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2324 | if (int_value != 0) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2325 | __ xor_(Operand(operand->reg()), Immediate(value)); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2326 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2327 | } else { |
| 2328 | ASSERT(op == Token::BIT_OR); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2329 | if (int_value != 0) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2330 | __ or_(Operand(operand->reg()), Immediate(value)); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2331 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2332 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2333 | deferred->BindExit(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2334 | answer = *operand; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2335 | break; |
| 2336 | } |
| 2337 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2338 | case Token::DIV: |
| 2339 | if (!reversed && int_value == 2) { |
| 2340 | operand->ToRegister(); |
| 2341 | frame_->Spill(operand->reg()); |
| 2342 | |
| 2343 | DeferredInlineSmiOperation* deferred = |
| 2344 | new DeferredInlineSmiOperation(op, |
| 2345 | operand->reg(), |
| 2346 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2347 | operand->type_info(), |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2348 | smi_value, |
| 2349 | overwrite_mode); |
| 2350 | // Check that lowest log2(value) bits of operand are zero, and test |
| 2351 | // smi tag at the same time. |
| 2352 | ASSERT_EQ(0, kSmiTag); |
| 2353 | ASSERT_EQ(1, kSmiTagSize); |
| 2354 | __ test(operand->reg(), Immediate(3)); |
| 2355 | deferred->Branch(not_zero); // Branch if non-smi or odd smi. |
| 2356 | __ sar(operand->reg(), 1); |
| 2357 | deferred->BindExit(); |
| 2358 | answer = *operand; |
| 2359 | } else { |
| 2360 | // Cannot fall through MOD to default case, so we duplicate the |
| 2361 | // default case here. |
| 2362 | Result constant_operand(value); |
| 2363 | if (reversed) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2364 | answer = LikelySmiBinaryOperation(expr, &constant_operand, operand, |
| 2365 | overwrite_mode); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2366 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2367 | answer = LikelySmiBinaryOperation(expr, operand, &constant_operand, |
| 2368 | overwrite_mode); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2369 | } |
| 2370 | } |
| 2371 | break; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2372 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2373 | // Generate inline code for mod of powers of 2 and negative powers of 2. |
| 2374 | case Token::MOD: |
| 2375 | if (!reversed && |
| 2376 | int_value != 0 && |
| 2377 | (IsPowerOf2(int_value) || IsPowerOf2(-int_value))) { |
| 2378 | operand->ToRegister(); |
| 2379 | frame_->Spill(operand->reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2380 | DeferredCode* deferred = |
| 2381 | new DeferredInlineSmiOperation(op, |
| 2382 | operand->reg(), |
| 2383 | operand->reg(), |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2384 | operand->type_info(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2385 | smi_value, |
| 2386 | overwrite_mode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2387 | // Check for negative or non-Smi left hand side. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2388 | __ test(operand->reg(), Immediate(kSmiTagMask | kSmiSignMask)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2389 | deferred->Branch(not_zero); |
| 2390 | if (int_value < 0) int_value = -int_value; |
| 2391 | if (int_value == 1) { |
| 2392 | __ mov(operand->reg(), Immediate(Smi::FromInt(0))); |
| 2393 | } else { |
| 2394 | __ and_(operand->reg(), (int_value << kSmiTagSize) - 1); |
| 2395 | } |
| 2396 | deferred->BindExit(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2397 | answer = *operand; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2398 | break; |
| 2399 | } |
| 2400 | // Fall through if we did not find a power of 2 on the right hand side! |
| 2401 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2402 | default: { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2403 | Result constant_operand(value); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 2404 | if (reversed) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2405 | answer = LikelySmiBinaryOperation(expr, &constant_operand, operand, |
| 2406 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2407 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2408 | answer = LikelySmiBinaryOperation(expr, operand, &constant_operand, |
| 2409 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2410 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2411 | break; |
| 2412 | } |
| 2413 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2414 | ASSERT(answer.is_valid()); |
| 2415 | return answer; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2416 | } |
| 2417 | |
| 2418 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2419 | static bool CouldBeNaN(const Result& result) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2420 | if (result.type_info().IsSmi()) return false; |
| 2421 | if (result.type_info().IsInteger32()) return false; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2422 | if (!result.is_constant()) return true; |
| 2423 | if (!result.handle()->IsHeapNumber()) return false; |
| 2424 | return isnan(HeapNumber::cast(*result.handle())->value()); |
| 2425 | } |
| 2426 | |
| 2427 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2428 | // Convert from signed to unsigned comparison to match the way EFLAGS are set |
| 2429 | // by FPU and XMM compare instructions. |
| 2430 | static Condition DoubleCondition(Condition cc) { |
| 2431 | switch (cc) { |
| 2432 | case less: return below; |
| 2433 | case equal: return equal; |
| 2434 | case less_equal: return below_equal; |
| 2435 | case greater: return above; |
| 2436 | case greater_equal: return above_equal; |
| 2437 | default: UNREACHABLE(); |
| 2438 | } |
| 2439 | UNREACHABLE(); |
| 2440 | return equal; |
| 2441 | } |
| 2442 | |
| 2443 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2444 | void CodeGenerator::Comparison(AstNode* node, |
| 2445 | Condition cc, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2446 | bool strict, |
| 2447 | ControlDestination* dest) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2448 | // Strict only makes sense for equality comparisons. |
| 2449 | ASSERT(!strict || cc == equal); |
| 2450 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 2451 | Result left_side; |
| 2452 | Result right_side; |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2453 | // Implement '>' and '<=' by reversal to obtain ECMA-262 conversion order. |
| 2454 | if (cc == greater || cc == less_equal) { |
| 2455 | cc = ReverseCondition(cc); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2456 | left_side = frame_->Pop(); |
| 2457 | right_side = frame_->Pop(); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2458 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2459 | right_side = frame_->Pop(); |
| 2460 | left_side = frame_->Pop(); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 2461 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2462 | ASSERT(cc == less || cc == equal || cc == greater_equal); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2463 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2464 | // If either side is a constant of some sort, we can probably optimize the |
| 2465 | // comparison. |
| 2466 | bool left_side_constant_smi = false; |
| 2467 | bool left_side_constant_null = false; |
| 2468 | bool left_side_constant_1_char_string = false; |
| 2469 | if (left_side.is_constant()) { |
| 2470 | left_side_constant_smi = left_side.handle()->IsSmi(); |
| 2471 | left_side_constant_null = left_side.handle()->IsNull(); |
| 2472 | left_side_constant_1_char_string = |
| 2473 | (left_side.handle()->IsString() && |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2474 | String::cast(*left_side.handle())->length() == 1 && |
| 2475 | String::cast(*left_side.handle())->IsAsciiRepresentation()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2476 | } |
| 2477 | bool right_side_constant_smi = false; |
| 2478 | bool right_side_constant_null = false; |
| 2479 | bool right_side_constant_1_char_string = false; |
| 2480 | if (right_side.is_constant()) { |
| 2481 | right_side_constant_smi = right_side.handle()->IsSmi(); |
| 2482 | right_side_constant_null = right_side.handle()->IsNull(); |
| 2483 | right_side_constant_1_char_string = |
| 2484 | (right_side.handle()->IsString() && |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2485 | String::cast(*right_side.handle())->length() == 1 && |
| 2486 | String::cast(*right_side.handle())->IsAsciiRepresentation()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2487 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2488 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2489 | if (left_side_constant_smi || right_side_constant_smi) { |
| 2490 | if (left_side_constant_smi && right_side_constant_smi) { |
| 2491 | // Trivial case, comparing two constants. |
| 2492 | int left_value = Smi::cast(*left_side.handle())->value(); |
| 2493 | int right_value = Smi::cast(*right_side.handle())->value(); |
| 2494 | switch (cc) { |
| 2495 | case less: |
| 2496 | dest->Goto(left_value < right_value); |
| 2497 | break; |
| 2498 | case equal: |
| 2499 | dest->Goto(left_value == right_value); |
| 2500 | break; |
| 2501 | case greater_equal: |
| 2502 | dest->Goto(left_value >= right_value); |
| 2503 | break; |
| 2504 | default: |
| 2505 | UNREACHABLE(); |
| 2506 | } |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2507 | } else { |
| 2508 | // Only one side is a constant Smi. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2509 | // If left side is a constant Smi, reverse the operands. |
| 2510 | // Since one side is a constant Smi, conversion order does not matter. |
| 2511 | if (left_side_constant_smi) { |
| 2512 | Result temp = left_side; |
| 2513 | left_side = right_side; |
| 2514 | right_side = temp; |
| 2515 | cc = ReverseCondition(cc); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2516 | // This may re-introduce greater or less_equal as the value of cc. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2517 | // CompareStub and the inline code both support all values of cc. |
| 2518 | } |
| 2519 | // Implement comparison against a constant Smi, inlining the case |
| 2520 | // where both sides are Smis. |
| 2521 | left_side.ToRegister(); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2522 | Register left_reg = left_side.reg(); |
| 2523 | Handle<Object> right_val = right_side.handle(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2524 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2525 | // Here we split control flow to the stub call and inlined cases |
| 2526 | // before finally splitting it to the control destination. We use |
| 2527 | // a jump target and branching to duplicate the virtual frame at |
| 2528 | // the first split. We manually handle the off-frame references |
| 2529 | // by reconstituting them on the non-fall-through path. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2530 | |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2531 | if (left_side.is_smi()) { |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2532 | if (FLAG_debug_code) { |
| 2533 | __ AbortIfNotSmi(left_side.reg()); |
| 2534 | } |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2535 | } else { |
| 2536 | JumpTarget is_smi; |
| 2537 | __ test(left_side.reg(), Immediate(kSmiTagMask)); |
| 2538 | is_smi.Branch(zero, taken); |
| 2539 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2540 | bool is_loop_condition = (node->AsExpression() != NULL) && |
| 2541 | node->AsExpression()->is_loop_condition(); |
| 2542 | if (!is_loop_condition && |
| 2543 | CpuFeatures::IsSupported(SSE2) && |
| 2544 | right_val->IsSmi()) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2545 | // Right side is a constant smi and left side has been checked |
| 2546 | // not to be a smi. |
| 2547 | CpuFeatures::Scope use_sse2(SSE2); |
| 2548 | JumpTarget not_number; |
| 2549 | __ cmp(FieldOperand(left_reg, HeapObject::kMapOffset), |
| 2550 | Immediate(Factory::heap_number_map())); |
| 2551 | not_number.Branch(not_equal, &left_side); |
| 2552 | __ movdbl(xmm1, |
| 2553 | FieldOperand(left_reg, HeapNumber::kValueOffset)); |
| 2554 | int value = Smi::cast(*right_val)->value(); |
| 2555 | if (value == 0) { |
| 2556 | __ xorpd(xmm0, xmm0); |
| 2557 | } else { |
| 2558 | Result temp = allocator()->Allocate(); |
| 2559 | __ mov(temp.reg(), Immediate(value)); |
| 2560 | __ cvtsi2sd(xmm0, Operand(temp.reg())); |
| 2561 | temp.Unuse(); |
| 2562 | } |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2563 | __ ucomisd(xmm1, xmm0); |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2564 | // Jump to builtin for NaN. |
| 2565 | not_number.Branch(parity_even, &left_side); |
| 2566 | left_side.Unuse(); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2567 | dest->true_target()->Branch(DoubleCondition(cc)); |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2568 | dest->false_target()->Jump(); |
| 2569 | not_number.Bind(&left_side); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2570 | } |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2571 | |
| 2572 | // Setup and call the compare stub. |
| 2573 | CompareStub stub(cc, strict, kCantBothBeNaN); |
| 2574 | Result result = frame_->CallStub(&stub, &left_side, &right_side); |
| 2575 | result.ToRegister(); |
| 2576 | __ cmp(result.reg(), 0); |
| 2577 | result.Unuse(); |
| 2578 | dest->true_target()->Branch(cc); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2579 | dest->false_target()->Jump(); |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 2580 | |
| 2581 | is_smi.Bind(); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2582 | } |
| 2583 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2584 | left_side = Result(left_reg); |
| 2585 | right_side = Result(right_val); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2586 | // Test smi equality and comparison by signed int comparison. |
| 2587 | if (IsUnsafeSmi(right_side.handle())) { |
| 2588 | right_side.ToRegister(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2589 | __ cmp(left_side.reg(), Operand(right_side.reg())); |
| 2590 | } else { |
| 2591 | __ cmp(Operand(left_side.reg()), Immediate(right_side.handle())); |
| 2592 | } |
| 2593 | left_side.Unuse(); |
| 2594 | right_side.Unuse(); |
| 2595 | dest->Split(cc); |
| 2596 | } |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2597 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2598 | } else if (cc == equal && |
| 2599 | (left_side_constant_null || right_side_constant_null)) { |
| 2600 | // To make null checks efficient, we check if either the left side or |
| 2601 | // the right side is the constant 'null'. |
| 2602 | // If so, we optimize the code by inlining a null check instead of |
| 2603 | // calling the (very) general runtime routine for checking equality. |
| 2604 | Result operand = left_side_constant_null ? right_side : left_side; |
| 2605 | right_side.Unuse(); |
| 2606 | left_side.Unuse(); |
| 2607 | operand.ToRegister(); |
| 2608 | __ cmp(operand.reg(), Factory::null_value()); |
| 2609 | if (strict) { |
| 2610 | operand.Unuse(); |
| 2611 | dest->Split(equal); |
| 2612 | } else { |
| 2613 | // The 'null' value is only equal to 'undefined' if using non-strict |
| 2614 | // comparisons. |
| 2615 | dest->true_target()->Branch(equal); |
| 2616 | __ cmp(operand.reg(), Factory::undefined_value()); |
| 2617 | dest->true_target()->Branch(equal); |
| 2618 | __ test(operand.reg(), Immediate(kSmiTagMask)); |
| 2619 | dest->false_target()->Branch(equal); |
| 2620 | |
| 2621 | // It can be an undetectable object. |
| 2622 | // Use a scratch register in preference to spilling operand.reg(). |
| 2623 | Result temp = allocator()->Allocate(); |
| 2624 | ASSERT(temp.is_valid()); |
| 2625 | __ mov(temp.reg(), |
| 2626 | FieldOperand(operand.reg(), HeapObject::kMapOffset)); |
| 2627 | __ movzx_b(temp.reg(), |
| 2628 | FieldOperand(temp.reg(), Map::kBitFieldOffset)); |
| 2629 | __ test(temp.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 2630 | temp.Unuse(); |
| 2631 | operand.Unuse(); |
| 2632 | dest->Split(not_zero); |
| 2633 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2634 | } else if (left_side_constant_1_char_string || |
| 2635 | right_side_constant_1_char_string) { |
| 2636 | if (left_side_constant_1_char_string && right_side_constant_1_char_string) { |
| 2637 | // Trivial case, comparing two constants. |
| 2638 | int left_value = String::cast(*left_side.handle())->Get(0); |
| 2639 | int right_value = String::cast(*right_side.handle())->Get(0); |
| 2640 | switch (cc) { |
| 2641 | case less: |
| 2642 | dest->Goto(left_value < right_value); |
| 2643 | break; |
| 2644 | case equal: |
| 2645 | dest->Goto(left_value == right_value); |
| 2646 | break; |
| 2647 | case greater_equal: |
| 2648 | dest->Goto(left_value >= right_value); |
| 2649 | break; |
| 2650 | default: |
| 2651 | UNREACHABLE(); |
| 2652 | } |
| 2653 | } else { |
| 2654 | // Only one side is a constant 1 character string. |
| 2655 | // If left side is a constant 1-character string, reverse the operands. |
| 2656 | // Since one side is a constant string, conversion order does not matter. |
| 2657 | if (left_side_constant_1_char_string) { |
| 2658 | Result temp = left_side; |
| 2659 | left_side = right_side; |
| 2660 | right_side = temp; |
| 2661 | cc = ReverseCondition(cc); |
| 2662 | // This may reintroduce greater or less_equal as the value of cc. |
| 2663 | // CompareStub and the inline code both support all values of cc. |
| 2664 | } |
| 2665 | // Implement comparison against a constant string, inlining the case |
| 2666 | // where both sides are strings. |
| 2667 | left_side.ToRegister(); |
| 2668 | |
| 2669 | // Here we split control flow to the stub call and inlined cases |
| 2670 | // before finally splitting it to the control destination. We use |
| 2671 | // a jump target and branching to duplicate the virtual frame at |
| 2672 | // the first split. We manually handle the off-frame references |
| 2673 | // by reconstituting them on the non-fall-through path. |
| 2674 | JumpTarget is_not_string, is_string; |
| 2675 | Register left_reg = left_side.reg(); |
| 2676 | Handle<Object> right_val = right_side.handle(); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2677 | ASSERT(StringShape(String::cast(*right_val)).IsSymbol()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2678 | __ test(left_side.reg(), Immediate(kSmiTagMask)); |
| 2679 | is_not_string.Branch(zero, &left_side); |
| 2680 | Result temp = allocator_->Allocate(); |
| 2681 | ASSERT(temp.is_valid()); |
| 2682 | __ mov(temp.reg(), |
| 2683 | FieldOperand(left_side.reg(), HeapObject::kMapOffset)); |
| 2684 | __ movzx_b(temp.reg(), |
| 2685 | FieldOperand(temp.reg(), Map::kInstanceTypeOffset)); |
| 2686 | // If we are testing for equality then make use of the symbol shortcut. |
| 2687 | // Check if the right left hand side has the same type as the left hand |
| 2688 | // side (which is always a symbol). |
| 2689 | if (cc == equal) { |
| 2690 | Label not_a_symbol; |
| 2691 | ASSERT(kSymbolTag != 0); |
| 2692 | // Ensure that no non-strings have the symbol bit set. |
| 2693 | ASSERT(kNotStringTag + kIsSymbolMask > LAST_TYPE); |
| 2694 | __ test(temp.reg(), Immediate(kIsSymbolMask)); // Test the symbol bit. |
| 2695 | __ j(zero, ¬_a_symbol); |
| 2696 | // They are symbols, so do identity compare. |
| 2697 | __ cmp(left_side.reg(), right_side.handle()); |
| 2698 | dest->true_target()->Branch(equal); |
| 2699 | dest->false_target()->Branch(not_equal); |
| 2700 | __ bind(¬_a_symbol); |
| 2701 | } |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2702 | // Call the compare stub if the left side is not a flat ascii string. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2703 | __ and_(temp.reg(), |
| 2704 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask); |
| 2705 | __ cmp(temp.reg(), kStringTag | kSeqStringTag | kAsciiStringTag); |
| 2706 | temp.Unuse(); |
| 2707 | is_string.Branch(equal, &left_side); |
| 2708 | |
| 2709 | // Setup and call the compare stub. |
| 2710 | is_not_string.Bind(&left_side); |
| 2711 | CompareStub stub(cc, strict, kCantBothBeNaN); |
| 2712 | Result result = frame_->CallStub(&stub, &left_side, &right_side); |
| 2713 | result.ToRegister(); |
| 2714 | __ cmp(result.reg(), 0); |
| 2715 | result.Unuse(); |
| 2716 | dest->true_target()->Branch(cc); |
| 2717 | dest->false_target()->Jump(); |
| 2718 | |
| 2719 | is_string.Bind(&left_side); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2720 | // left_side is a sequential ASCII string. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2721 | left_side = Result(left_reg); |
| 2722 | right_side = Result(right_val); |
| 2723 | Result temp2 = allocator_->Allocate(); |
| 2724 | ASSERT(temp2.is_valid()); |
| 2725 | // Test string equality and comparison. |
| 2726 | if (cc == equal) { |
| 2727 | Label comparison_done; |
| 2728 | __ cmp(FieldOperand(left_side.reg(), String::kLengthOffset), |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2729 | Immediate(Smi::FromInt(1))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2730 | __ j(not_equal, &comparison_done); |
| 2731 | uint8_t char_value = |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2732 | static_cast<uint8_t>(String::cast(*right_val)->Get(0)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2733 | __ cmpb(FieldOperand(left_side.reg(), SeqAsciiString::kHeaderSize), |
| 2734 | char_value); |
| 2735 | __ bind(&comparison_done); |
| 2736 | } else { |
| 2737 | __ mov(temp2.reg(), |
| 2738 | FieldOperand(left_side.reg(), String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2739 | __ SmiUntag(temp2.reg()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2740 | __ sub(Operand(temp2.reg()), Immediate(1)); |
| 2741 | Label comparison; |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2742 | // If the length is 0 then the subtraction gave -1 which compares less |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2743 | // than any character. |
| 2744 | __ j(negative, &comparison); |
| 2745 | // Otherwise load the first character. |
| 2746 | __ movzx_b(temp2.reg(), |
| 2747 | FieldOperand(left_side.reg(), SeqAsciiString::kHeaderSize)); |
| 2748 | __ bind(&comparison); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2749 | // Compare the first character of the string with the |
| 2750 | // constant 1-character string. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2751 | uint8_t char_value = |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 2752 | static_cast<uint8_t>(String::cast(*right_val)->Get(0)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2753 | __ cmp(Operand(temp2.reg()), Immediate(char_value)); |
| 2754 | Label characters_were_different; |
| 2755 | __ j(not_equal, &characters_were_different); |
| 2756 | // If the first character is the same then the long string sorts after |
| 2757 | // the short one. |
| 2758 | __ cmp(FieldOperand(left_side.reg(), String::kLengthOffset), |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2759 | Immediate(Smi::FromInt(1))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2760 | __ bind(&characters_were_different); |
| 2761 | } |
| 2762 | temp2.Unuse(); |
| 2763 | left_side.Unuse(); |
| 2764 | right_side.Unuse(); |
| 2765 | dest->Split(cc); |
| 2766 | } |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 2767 | } else { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2768 | // Neither side is a constant Smi, constant 1-char string or constant null. |
| 2769 | // If either side is a non-smi constant, or known to be a heap number skip |
| 2770 | // the smi check. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2771 | bool known_non_smi = |
| 2772 | (left_side.is_constant() && !left_side.handle()->IsSmi()) || |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2773 | (right_side.is_constant() && !right_side.handle()->IsSmi()) || |
| 2774 | left_side.type_info().IsDouble() || |
| 2775 | right_side.type_info().IsDouble(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2776 | NaNInformation nan_info = |
| 2777 | (CouldBeNaN(left_side) && CouldBeNaN(right_side)) ? |
| 2778 | kBothCouldBeNaN : |
| 2779 | kCantBothBeNaN; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2780 | |
| 2781 | // Inline number comparison handling any combination of smi's and heap |
| 2782 | // numbers if: |
| 2783 | // code is in a loop |
| 2784 | // the compare operation is different from equal |
| 2785 | // compare is not a for-loop comparison |
| 2786 | // The reason for excluding equal is that it will most likely be done |
| 2787 | // with smi's (not heap numbers) and the code to comparing smi's is inlined |
| 2788 | // separately. The same reason applies for for-loop comparison which will |
| 2789 | // also most likely be smi comparisons. |
| 2790 | bool is_loop_condition = (node->AsExpression() != NULL) |
| 2791 | && node->AsExpression()->is_loop_condition(); |
| 2792 | bool inline_number_compare = |
| 2793 | loop_nesting() > 0 && cc != equal && !is_loop_condition; |
| 2794 | |
| 2795 | // Left and right needed in registers for the following code. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2796 | left_side.ToRegister(); |
| 2797 | right_side.ToRegister(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2798 | |
| 2799 | if (known_non_smi) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2800 | // Inline the equality check if both operands can't be a NaN. If both |
| 2801 | // objects are the same they are equal. |
| 2802 | if (nan_info == kCantBothBeNaN && cc == equal) { |
| 2803 | __ cmp(left_side.reg(), Operand(right_side.reg())); |
| 2804 | dest->true_target()->Branch(equal); |
| 2805 | } |
| 2806 | |
| 2807 | // Inline number comparison. |
| 2808 | if (inline_number_compare) { |
| 2809 | GenerateInlineNumberComparison(&left_side, &right_side, cc, dest); |
| 2810 | } |
| 2811 | |
| 2812 | // End of in-line compare, call out to the compare stub. Don't include |
| 2813 | // number comparison in the stub if it was inlined. |
| 2814 | CompareStub stub(cc, strict, nan_info, !inline_number_compare); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2815 | Result answer = frame_->CallStub(&stub, &left_side, &right_side); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 2816 | __ test(answer.reg(), Operand(answer.reg())); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2817 | answer.Unuse(); |
| 2818 | dest->Split(cc); |
| 2819 | } else { |
| 2820 | // Here we split control flow to the stub call and inlined cases |
| 2821 | // before finally splitting it to the control destination. We use |
| 2822 | // a jump target and branching to duplicate the virtual frame at |
| 2823 | // the first split. We manually handle the off-frame references |
| 2824 | // by reconstituting them on the non-fall-through path. |
| 2825 | JumpTarget is_smi; |
| 2826 | Register left_reg = left_side.reg(); |
| 2827 | Register right_reg = right_side.reg(); |
| 2828 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2829 | // In-line check for comparing two smis. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2830 | Result temp = allocator_->Allocate(); |
| 2831 | ASSERT(temp.is_valid()); |
| 2832 | __ mov(temp.reg(), left_side.reg()); |
| 2833 | __ or_(temp.reg(), Operand(right_side.reg())); |
| 2834 | __ test(temp.reg(), Immediate(kSmiTagMask)); |
| 2835 | temp.Unuse(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2836 | is_smi.Branch(zero, taken); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2837 | |
| 2838 | // Inline the equality check if both operands can't be a NaN. If both |
| 2839 | // objects are the same they are equal. |
| 2840 | if (nan_info == kCantBothBeNaN && cc == equal) { |
| 2841 | __ cmp(left_side.reg(), Operand(right_side.reg())); |
| 2842 | dest->true_target()->Branch(equal); |
| 2843 | } |
| 2844 | |
| 2845 | // Inline number comparison. |
| 2846 | if (inline_number_compare) { |
| 2847 | GenerateInlineNumberComparison(&left_side, &right_side, cc, dest); |
| 2848 | } |
| 2849 | |
| 2850 | // End of in-line compare, call out to the compare stub. Don't include |
| 2851 | // number comparison in the stub if it was inlined. |
| 2852 | CompareStub stub(cc, strict, nan_info, !inline_number_compare); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2853 | Result answer = frame_->CallStub(&stub, &left_side, &right_side); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2854 | __ test(answer.reg(), Operand(answer.reg())); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2855 | answer.Unuse(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2856 | dest->true_target()->Branch(cc); |
| 2857 | dest->false_target()->Jump(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2858 | |
| 2859 | is_smi.Bind(); |
| 2860 | left_side = Result(left_reg); |
| 2861 | right_side = Result(right_reg); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2862 | __ cmp(left_side.reg(), Operand(right_side.reg())); |
| 2863 | right_side.Unuse(); |
| 2864 | left_side.Unuse(); |
| 2865 | dest->Split(cc); |
| 2866 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2867 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2868 | } |
| 2869 | |
| 2870 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 2871 | // Check that the comparison operand is a number. Jump to not_numbers jump |
| 2872 | // target passing the left and right result if the operand is not a number. |
| 2873 | static void CheckComparisonOperand(MacroAssembler* masm_, |
| 2874 | Result* operand, |
| 2875 | Result* left_side, |
| 2876 | Result* right_side, |
| 2877 | JumpTarget* not_numbers) { |
| 2878 | // Perform check if operand is not known to be a number. |
| 2879 | if (!operand->type_info().IsNumber()) { |
| 2880 | Label done; |
| 2881 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2882 | __ j(zero, &done); |
| 2883 | __ cmp(FieldOperand(operand->reg(), HeapObject::kMapOffset), |
| 2884 | Immediate(Factory::heap_number_map())); |
| 2885 | not_numbers->Branch(not_equal, left_side, right_side, not_taken); |
| 2886 | __ bind(&done); |
| 2887 | } |
| 2888 | } |
| 2889 | |
| 2890 | |
| 2891 | // Load a comparison operand to the FPU stack. This assumes that the operand has |
| 2892 | // already been checked and is a number. |
| 2893 | static void LoadComparisonOperand(MacroAssembler* masm_, |
| 2894 | Result* operand) { |
| 2895 | Label done; |
| 2896 | if (operand->type_info().IsDouble()) { |
| 2897 | // Operand is known to be a heap number, just load it. |
| 2898 | __ fld_d(FieldOperand(operand->reg(), HeapNumber::kValueOffset)); |
| 2899 | } else if (operand->type_info().IsSmi()) { |
| 2900 | // Operand is known to be a smi. Convert it to double and keep the original |
| 2901 | // smi. |
| 2902 | __ SmiUntag(operand->reg()); |
| 2903 | __ push(operand->reg()); |
| 2904 | __ fild_s(Operand(esp, 0)); |
| 2905 | __ pop(operand->reg()); |
| 2906 | __ SmiTag(operand->reg()); |
| 2907 | } else { |
| 2908 | // Operand type not known, check for smi otherwise assume heap number. |
| 2909 | Label smi; |
| 2910 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2911 | __ j(zero, &smi); |
| 2912 | __ fld_d(FieldOperand(operand->reg(), HeapNumber::kValueOffset)); |
| 2913 | __ jmp(&done); |
| 2914 | __ bind(&smi); |
| 2915 | __ SmiUntag(operand->reg()); |
| 2916 | __ push(operand->reg()); |
| 2917 | __ fild_s(Operand(esp, 0)); |
| 2918 | __ pop(operand->reg()); |
| 2919 | __ SmiTag(operand->reg()); |
| 2920 | __ jmp(&done); |
| 2921 | } |
| 2922 | __ bind(&done); |
| 2923 | } |
| 2924 | |
| 2925 | |
| 2926 | // Load a comparison operand into into a XMM register. Jump to not_numbers jump |
| 2927 | // target passing the left and right result if the operand is not a number. |
| 2928 | static void LoadComparisonOperandSSE2(MacroAssembler* masm_, |
| 2929 | Result* operand, |
| 2930 | XMMRegister reg, |
| 2931 | Result* left_side, |
| 2932 | Result* right_side, |
| 2933 | JumpTarget* not_numbers) { |
| 2934 | Label done; |
| 2935 | if (operand->type_info().IsDouble()) { |
| 2936 | // Operand is known to be a heap number, just load it. |
| 2937 | __ movdbl(reg, FieldOperand(operand->reg(), HeapNumber::kValueOffset)); |
| 2938 | } else if (operand->type_info().IsSmi()) { |
| 2939 | // Operand is known to be a smi. Convert it to double and keep the original |
| 2940 | // smi. |
| 2941 | __ SmiUntag(operand->reg()); |
| 2942 | __ cvtsi2sd(reg, Operand(operand->reg())); |
| 2943 | __ SmiTag(operand->reg()); |
| 2944 | } else { |
| 2945 | // Operand type not known, check for smi or heap number. |
| 2946 | Label smi; |
| 2947 | __ test(operand->reg(), Immediate(kSmiTagMask)); |
| 2948 | __ j(zero, &smi); |
| 2949 | if (!operand->type_info().IsNumber()) { |
| 2950 | __ cmp(FieldOperand(operand->reg(), HeapObject::kMapOffset), |
| 2951 | Immediate(Factory::heap_number_map())); |
| 2952 | not_numbers->Branch(not_equal, left_side, right_side, taken); |
| 2953 | } |
| 2954 | __ movdbl(reg, FieldOperand(operand->reg(), HeapNumber::kValueOffset)); |
| 2955 | __ jmp(&done); |
| 2956 | |
| 2957 | __ bind(&smi); |
| 2958 | // Comvert smi to float and keep the original smi. |
| 2959 | __ SmiUntag(operand->reg()); |
| 2960 | __ cvtsi2sd(reg, Operand(operand->reg())); |
| 2961 | __ SmiTag(operand->reg()); |
| 2962 | __ jmp(&done); |
| 2963 | } |
| 2964 | __ bind(&done); |
| 2965 | } |
| 2966 | |
| 2967 | |
| 2968 | void CodeGenerator::GenerateInlineNumberComparison(Result* left_side, |
| 2969 | Result* right_side, |
| 2970 | Condition cc, |
| 2971 | ControlDestination* dest) { |
| 2972 | ASSERT(left_side->is_register()); |
| 2973 | ASSERT(right_side->is_register()); |
| 2974 | |
| 2975 | JumpTarget not_numbers; |
| 2976 | if (CpuFeatures::IsSupported(SSE2)) { |
| 2977 | CpuFeatures::Scope use_sse2(SSE2); |
| 2978 | |
| 2979 | // Load left and right operand into registers xmm0 and xmm1 and compare. |
| 2980 | LoadComparisonOperandSSE2(masm_, left_side, xmm0, left_side, right_side, |
| 2981 | ¬_numbers); |
| 2982 | LoadComparisonOperandSSE2(masm_, right_side, xmm1, left_side, right_side, |
| 2983 | ¬_numbers); |
| 2984 | __ comisd(xmm0, xmm1); |
| 2985 | } else { |
| 2986 | Label check_right, compare; |
| 2987 | |
| 2988 | // Make sure that both comparison operands are numbers. |
| 2989 | CheckComparisonOperand(masm_, left_side, left_side, right_side, |
| 2990 | ¬_numbers); |
| 2991 | CheckComparisonOperand(masm_, right_side, left_side, right_side, |
| 2992 | ¬_numbers); |
| 2993 | |
| 2994 | // Load right and left operand to FPU stack and compare. |
| 2995 | LoadComparisonOperand(masm_, right_side); |
| 2996 | LoadComparisonOperand(masm_, left_side); |
| 2997 | __ FCmp(); |
| 2998 | } |
| 2999 | |
| 3000 | // Bail out if a NaN is involved. |
| 3001 | not_numbers.Branch(parity_even, left_side, right_side, not_taken); |
| 3002 | |
| 3003 | // Split to destination targets based on comparison. |
| 3004 | left_side->Unuse(); |
| 3005 | right_side->Unuse(); |
| 3006 | dest->true_target()->Branch(DoubleCondition(cc)); |
| 3007 | dest->false_target()->Jump(); |
| 3008 | |
| 3009 | not_numbers.Bind(left_side, right_side); |
| 3010 | } |
| 3011 | |
| 3012 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3013 | // Call the function just below TOS on the stack with the given |
| 3014 | // arguments. The receiver is the TOS. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3015 | void CodeGenerator::CallWithArguments(ZoneList<Expression*>* args, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3016 | CallFunctionFlags flags, |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3017 | int position) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3018 | // Push the arguments ("left-to-right") on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3019 | int arg_count = args->length(); |
| 3020 | for (int i = 0; i < arg_count; i++) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3021 | Load(args->at(i)); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 3022 | frame_->SpillTop(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3023 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3024 | |
| 3025 | // Record the position for debugging purposes. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3026 | CodeForSourcePosition(position); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3027 | |
| 3028 | // Use the shared code stub to call the function. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3029 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3030 | CallFunctionStub call_function(arg_count, in_loop, flags); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3031 | Result answer = frame_->CallStub(&call_function, arg_count + 1); |
| 3032 | // Restore context and replace function on the stack with the |
| 3033 | // result of the stub invocation. |
| 3034 | frame_->RestoreContextRegister(); |
| 3035 | frame_->SetElementAt(0, &answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3036 | } |
| 3037 | |
| 3038 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3039 | void CodeGenerator::CallApplyLazy(Expression* applicand, |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3040 | Expression* receiver, |
| 3041 | VariableProxy* arguments, |
| 3042 | int position) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3043 | // An optimized implementation of expressions of the form |
| 3044 | // x.apply(y, arguments). |
| 3045 | // If the arguments object of the scope has not been allocated, |
| 3046 | // and x.apply is Function.prototype.apply, this optimization |
| 3047 | // just copies y and the arguments of the current function on the |
| 3048 | // stack, as receiver and arguments, and calls x. |
| 3049 | // In the implementation comments, we call x the applicand |
| 3050 | // and y the receiver. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3051 | ASSERT(ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION); |
| 3052 | ASSERT(arguments->IsArguments()); |
| 3053 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3054 | // Load applicand.apply onto the stack. This will usually |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3055 | // give us a megamorphic load site. Not super, but it works. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3056 | Load(applicand); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3057 | frame()->Dup(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3058 | Handle<String> name = Factory::LookupAsciiSymbol("apply"); |
| 3059 | frame()->Push(name); |
| 3060 | Result answer = frame()->CallLoadIC(RelocInfo::CODE_TARGET); |
| 3061 | __ nop(); |
| 3062 | frame()->Push(&answer); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3063 | |
| 3064 | // Load the receiver and the existing arguments object onto the |
| 3065 | // expression stack. Avoid allocating the arguments object here. |
| 3066 | Load(receiver); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 3067 | LoadFromSlot(scope()->arguments()->var()->slot(), NOT_INSIDE_TYPEOF); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3068 | |
| 3069 | // Emit the source position information after having loaded the |
| 3070 | // receiver and the arguments. |
| 3071 | CodeForSourcePosition(position); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3072 | // Contents of frame at this point: |
| 3073 | // Frame[0]: arguments object of the current function or the hole. |
| 3074 | // Frame[1]: receiver |
| 3075 | // Frame[2]: applicand.apply |
| 3076 | // Frame[3]: applicand. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3077 | |
| 3078 | // Check if the arguments object has been lazily allocated |
| 3079 | // already. If so, just use that instead of copying the arguments |
| 3080 | // from the stack. This also deals with cases where a local variable |
| 3081 | // named 'arguments' has been introduced. |
| 3082 | frame_->Dup(); |
| 3083 | Result probe = frame_->Pop(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3084 | { VirtualFrame::SpilledScope spilled_scope; |
| 3085 | Label slow, done; |
| 3086 | bool try_lazy = true; |
| 3087 | if (probe.is_constant()) { |
| 3088 | try_lazy = probe.handle()->IsTheHole(); |
| 3089 | } else { |
| 3090 | __ cmp(Operand(probe.reg()), Immediate(Factory::the_hole_value())); |
| 3091 | probe.Unuse(); |
| 3092 | __ j(not_equal, &slow); |
| 3093 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3094 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3095 | if (try_lazy) { |
| 3096 | Label build_args; |
| 3097 | // Get rid of the arguments object probe. |
| 3098 | frame_->Drop(); // Can be called on a spilled frame. |
| 3099 | // Stack now has 3 elements on it. |
| 3100 | // Contents of stack at this point: |
| 3101 | // esp[0]: receiver |
| 3102 | // esp[1]: applicand.apply |
| 3103 | // esp[2]: applicand. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3104 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3105 | // Check that the receiver really is a JavaScript object. |
| 3106 | __ mov(eax, Operand(esp, 0)); |
| 3107 | __ test(eax, Immediate(kSmiTagMask)); |
| 3108 | __ j(zero, &build_args); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3109 | // We allow all JSObjects including JSFunctions. As long as |
| 3110 | // JS_FUNCTION_TYPE is the last instance type and it is right |
| 3111 | // after LAST_JS_OBJECT_TYPE, we do not have to check the upper |
| 3112 | // bound. |
| 3113 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 3114 | ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3115 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, ecx); |
| 3116 | __ j(below, &build_args); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3117 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3118 | // Check that applicand.apply is Function.prototype.apply. |
| 3119 | __ mov(eax, Operand(esp, kPointerSize)); |
| 3120 | __ test(eax, Immediate(kSmiTagMask)); |
| 3121 | __ j(zero, &build_args); |
| 3122 | __ CmpObjectType(eax, JS_FUNCTION_TYPE, ecx); |
| 3123 | __ j(not_equal, &build_args); |
| 3124 | __ mov(ecx, FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3125 | Handle<Code> apply_code(Builtins::builtin(Builtins::FunctionApply)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3126 | __ cmp(FieldOperand(ecx, SharedFunctionInfo::kCodeOffset), |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3127 | Immediate(apply_code)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3128 | __ j(not_equal, &build_args); |
| 3129 | |
| 3130 | // Check that applicand is a function. |
| 3131 | __ mov(edi, Operand(esp, 2 * kPointerSize)); |
| 3132 | __ test(edi, Immediate(kSmiTagMask)); |
| 3133 | __ j(zero, &build_args); |
| 3134 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| 3135 | __ j(not_equal, &build_args); |
| 3136 | |
| 3137 | // Copy the arguments to this function possibly from the |
| 3138 | // adaptor frame below it. |
| 3139 | Label invoke, adapted; |
| 3140 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3141 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 3142 | __ cmp(Operand(ecx), |
| 3143 | Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 3144 | __ j(equal, &adapted); |
| 3145 | |
| 3146 | // No arguments adaptor frame. Copy fixed number of arguments. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3147 | __ mov(eax, Immediate(scope()->num_parameters())); |
| 3148 | for (int i = 0; i < scope()->num_parameters(); i++) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3149 | __ push(frame_->ParameterAt(i)); |
| 3150 | } |
| 3151 | __ jmp(&invoke); |
| 3152 | |
| 3153 | // Arguments adaptor frame present. Copy arguments from there, but |
| 3154 | // avoid copying too many arguments to avoid stack overflows. |
| 3155 | __ bind(&adapted); |
| 3156 | static const uint32_t kArgumentsLimit = 1 * KB; |
| 3157 | __ mov(eax, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 3158 | __ SmiUntag(eax); |
| 3159 | __ mov(ecx, Operand(eax)); |
| 3160 | __ cmp(eax, kArgumentsLimit); |
| 3161 | __ j(above, &build_args); |
| 3162 | |
| 3163 | // Loop through the arguments pushing them onto the execution |
| 3164 | // stack. We don't inform the virtual frame of the push, so we don't |
| 3165 | // have to worry about getting rid of the elements from the virtual |
| 3166 | // frame. |
| 3167 | Label loop; |
| 3168 | // ecx is a small non-negative integer, due to the test above. |
| 3169 | __ test(ecx, Operand(ecx)); |
| 3170 | __ j(zero, &invoke); |
| 3171 | __ bind(&loop); |
| 3172 | __ push(Operand(edx, ecx, times_pointer_size, 1 * kPointerSize)); |
| 3173 | __ dec(ecx); |
| 3174 | __ j(not_zero, &loop); |
| 3175 | |
| 3176 | // Invoke the function. |
| 3177 | __ bind(&invoke); |
| 3178 | ParameterCount actual(eax); |
| 3179 | __ InvokeFunction(edi, actual, CALL_FUNCTION); |
| 3180 | // Drop applicand.apply and applicand from the stack, and push |
| 3181 | // the result of the function call, but leave the spilled frame |
| 3182 | // unchanged, with 3 elements, so it is correct when we compile the |
| 3183 | // slow-case code. |
| 3184 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 3185 | __ push(eax); |
| 3186 | // Stack now has 1 element: |
| 3187 | // esp[0]: result |
| 3188 | __ jmp(&done); |
| 3189 | |
| 3190 | // Slow-case: Allocate the arguments object since we know it isn't |
| 3191 | // there, and fall-through to the slow-case where we call |
| 3192 | // applicand.apply. |
| 3193 | __ bind(&build_args); |
| 3194 | // Stack now has 3 elements, because we have jumped from where: |
| 3195 | // esp[0]: receiver |
| 3196 | // esp[1]: applicand.apply |
| 3197 | // esp[2]: applicand. |
| 3198 | |
| 3199 | // StoreArgumentsObject requires a correct frame, and may modify it. |
| 3200 | Result arguments_object = StoreArgumentsObject(false); |
| 3201 | frame_->SpillAll(); |
| 3202 | arguments_object.ToRegister(); |
| 3203 | frame_->EmitPush(arguments_object.reg()); |
| 3204 | arguments_object.Unuse(); |
| 3205 | // Stack and frame now have 4 elements. |
| 3206 | __ bind(&slow); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3207 | } |
| 3208 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3209 | // Generic computation of x.apply(y, args) with no special optimization. |
| 3210 | // Flip applicand.apply and applicand on the stack, so |
| 3211 | // applicand looks like the receiver of the applicand.apply call. |
| 3212 | // Then process it as a normal function call. |
| 3213 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 3214 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); |
| 3215 | __ mov(Operand(esp, 2 * kPointerSize), eax); |
| 3216 | __ mov(Operand(esp, 3 * kPointerSize), ebx); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3217 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3218 | CallFunctionStub call_function(2, NOT_IN_LOOP, NO_CALL_FUNCTION_FLAGS); |
| 3219 | Result res = frame_->CallStub(&call_function, 3); |
| 3220 | // The function and its two arguments have been dropped. |
| 3221 | frame_->Drop(1); // Drop the receiver as well. |
| 3222 | res.ToRegister(); |
| 3223 | frame_->EmitPush(res.reg()); |
| 3224 | // Stack now has 1 element: |
| 3225 | // esp[0]: result |
| 3226 | if (try_lazy) __ bind(&done); |
| 3227 | } // End of spilled scope. |
| 3228 | // Restore the context register after a call. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3229 | frame_->RestoreContextRegister(); |
| 3230 | } |
| 3231 | |
| 3232 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3233 | class DeferredStackCheck: public DeferredCode { |
| 3234 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 3235 | DeferredStackCheck() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3236 | set_comment("[ DeferredStackCheck"); |
| 3237 | } |
| 3238 | |
| 3239 | virtual void Generate(); |
| 3240 | }; |
| 3241 | |
| 3242 | |
| 3243 | void DeferredStackCheck::Generate() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3244 | StackCheckStub stub; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 3245 | __ CallStub(&stub); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3246 | } |
| 3247 | |
| 3248 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3249 | void CodeGenerator::CheckStack() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3250 | DeferredStackCheck* deferred = new DeferredStackCheck; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3251 | ExternalReference stack_limit = |
| 3252 | ExternalReference::address_of_stack_limit(); |
| 3253 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3254 | deferred->Branch(below); |
| 3255 | deferred->BindExit(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3256 | } |
| 3257 | |
| 3258 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3259 | void CodeGenerator::VisitAndSpill(Statement* statement) { |
| 3260 | ASSERT(in_spilled_code()); |
| 3261 | set_in_spilled_code(false); |
| 3262 | Visit(statement); |
| 3263 | if (frame_ != NULL) { |
| 3264 | frame_->SpillAll(); |
| 3265 | } |
| 3266 | set_in_spilled_code(true); |
| 3267 | } |
| 3268 | |
| 3269 | |
| 3270 | void CodeGenerator::VisitStatementsAndSpill(ZoneList<Statement*>* statements) { |
| 3271 | ASSERT(in_spilled_code()); |
| 3272 | set_in_spilled_code(false); |
| 3273 | VisitStatements(statements); |
| 3274 | if (frame_ != NULL) { |
| 3275 | frame_->SpillAll(); |
| 3276 | } |
| 3277 | set_in_spilled_code(true); |
| 3278 | } |
| 3279 | |
| 3280 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3281 | void CodeGenerator::VisitStatements(ZoneList<Statement*>* statements) { |
| 3282 | ASSERT(!in_spilled_code()); |
| 3283 | for (int i = 0; has_valid_frame() && i < statements->length(); i++) { |
| 3284 | Visit(statements->at(i)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3285 | } |
| 3286 | } |
| 3287 | |
| 3288 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3289 | void CodeGenerator::VisitBlock(Block* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3290 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3291 | Comment cmnt(masm_, "[ Block"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3292 | CodeForStatementPosition(node); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3293 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3294 | VisitStatements(node->statements()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3295 | if (node->break_target()->is_linked()) { |
| 3296 | node->break_target()->Bind(); |
| 3297 | } |
| 3298 | node->break_target()->Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3299 | } |
| 3300 | |
| 3301 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3302 | void CodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3303 | // Call the runtime to declare the globals. The inevitable call |
| 3304 | // will sync frame elements to memory anyway, so we do it eagerly to |
| 3305 | // allow us to push the arguments directly into place. |
| 3306 | frame_->SyncRange(0, frame_->element_count() - 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3307 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3308 | frame_->EmitPush(esi); // The context is the first argument. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3309 | frame_->EmitPush(Immediate(pairs)); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3310 | frame_->EmitPush(Immediate(Smi::FromInt(is_eval() ? 1 : 0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3311 | Result ignored = frame_->CallRuntime(Runtime::kDeclareGlobals, 3); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3312 | // Return value is ignored. |
| 3313 | } |
| 3314 | |
| 3315 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3316 | void CodeGenerator::VisitDeclaration(Declaration* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3317 | Comment cmnt(masm_, "[ Declaration"); |
| 3318 | Variable* var = node->proxy()->var(); |
| 3319 | ASSERT(var != NULL); // must have been resolved |
| 3320 | Slot* slot = var->slot(); |
| 3321 | |
| 3322 | // If it was not possible to allocate the variable at compile time, |
| 3323 | // we need to "declare" it at runtime to make sure it actually |
| 3324 | // exists in the local context. |
| 3325 | if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 3326 | // Variables with a "LOOKUP" slot were introduced as non-locals |
| 3327 | // during variable resolution and must have mode DYNAMIC. |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 3328 | ASSERT(var->is_dynamic()); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3329 | // For now, just do a runtime call. Sync the virtual frame eagerly |
| 3330 | // so we can simply push the arguments into place. |
| 3331 | frame_->SyncRange(0, frame_->element_count() - 1); |
| 3332 | frame_->EmitPush(esi); |
| 3333 | frame_->EmitPush(Immediate(var->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3334 | // Declaration nodes are always introduced in one of two modes. |
| 3335 | ASSERT(node->mode() == Variable::VAR || node->mode() == Variable::CONST); |
| 3336 | PropertyAttributes attr = node->mode() == Variable::VAR ? NONE : READ_ONLY; |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3337 | frame_->EmitPush(Immediate(Smi::FromInt(attr))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3338 | // Push initial value, if any. |
| 3339 | // Note: For variables we must not push an initial value (such as |
| 3340 | // 'undefined') because we may have a (legal) redeclaration and we |
| 3341 | // must not destroy the current value. |
| 3342 | if (node->mode() == Variable::CONST) { |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3343 | frame_->EmitPush(Immediate(Factory::the_hole_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3344 | } else if (node->fun() != NULL) { |
| 3345 | Load(node->fun()); |
| 3346 | } else { |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 3347 | frame_->EmitPush(Immediate(Smi::FromInt(0))); // no initial value! |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3348 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3349 | Result ignored = frame_->CallRuntime(Runtime::kDeclareContextSlot, 4); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3350 | // Ignore the return value (declarations are statements). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3351 | return; |
| 3352 | } |
| 3353 | |
| 3354 | ASSERT(!var->is_global()); |
| 3355 | |
| 3356 | // If we have a function or a constant, we need to initialize the variable. |
| 3357 | Expression* val = NULL; |
| 3358 | if (node->mode() == Variable::CONST) { |
| 3359 | val = new Literal(Factory::the_hole_value()); |
| 3360 | } else { |
| 3361 | val = node->fun(); // NULL if we don't have a function |
| 3362 | } |
| 3363 | |
| 3364 | if (val != NULL) { |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 3365 | { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3366 | // Set the initial value. |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 3367 | Reference target(this, node->proxy()); |
| 3368 | Load(val); |
| 3369 | target.SetValue(NOT_CONST_INIT); |
| 3370 | // The reference is removed from the stack (preserving TOS) when |
| 3371 | // it goes out of scope. |
| 3372 | } |
| 3373 | // Get rid of the assigned value (declarations are statements). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3374 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3375 | } |
| 3376 | } |
| 3377 | |
| 3378 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3379 | void CodeGenerator::VisitExpressionStatement(ExpressionStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3380 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3381 | Comment cmnt(masm_, "[ ExpressionStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3382 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3383 | Expression* expression = node->expression(); |
| 3384 | expression->MarkAsStatement(); |
| 3385 | Load(expression); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3386 | // Remove the lingering expression result from the top of stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3387 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3388 | } |
| 3389 | |
| 3390 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3391 | void CodeGenerator::VisitEmptyStatement(EmptyStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3392 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3393 | Comment cmnt(masm_, "// EmptyStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3394 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3395 | // nothing to do |
| 3396 | } |
| 3397 | |
| 3398 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3399 | void CodeGenerator::VisitIfStatement(IfStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3400 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3401 | Comment cmnt(masm_, "[ IfStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3402 | // Generate different code depending on which parts of the if statement |
| 3403 | // are present or not. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3404 | bool has_then_stm = node->HasThenStatement(); |
| 3405 | bool has_else_stm = node->HasElseStatement(); |
| 3406 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3407 | CodeForStatementPosition(node); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3408 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3409 | if (has_then_stm && has_else_stm) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3410 | JumpTarget then; |
| 3411 | JumpTarget else_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3412 | ControlDestination dest(&then, &else_, true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3413 | LoadCondition(node->condition(), &dest, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3414 | |
| 3415 | if (dest.false_was_fall_through()) { |
| 3416 | // The else target was bound, so we compile the else part first. |
| 3417 | Visit(node->else_statement()); |
| 3418 | |
| 3419 | // We may have dangling jumps to the then part. |
| 3420 | if (then.is_linked()) { |
| 3421 | if (has_valid_frame()) exit.Jump(); |
| 3422 | then.Bind(); |
| 3423 | Visit(node->then_statement()); |
| 3424 | } |
| 3425 | } else { |
| 3426 | // The then target was bound, so we compile the then part first. |
| 3427 | Visit(node->then_statement()); |
| 3428 | |
| 3429 | if (else_.is_linked()) { |
| 3430 | if (has_valid_frame()) exit.Jump(); |
| 3431 | else_.Bind(); |
| 3432 | Visit(node->else_statement()); |
| 3433 | } |
| 3434 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3435 | |
| 3436 | } else if (has_then_stm) { |
| 3437 | ASSERT(!has_else_stm); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3438 | JumpTarget then; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3439 | ControlDestination dest(&then, &exit, true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3440 | LoadCondition(node->condition(), &dest, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3441 | |
| 3442 | if (dest.false_was_fall_through()) { |
| 3443 | // The exit label was bound. We may have dangling jumps to the |
| 3444 | // then part. |
| 3445 | if (then.is_linked()) { |
| 3446 | exit.Unuse(); |
| 3447 | exit.Jump(); |
| 3448 | then.Bind(); |
| 3449 | Visit(node->then_statement()); |
| 3450 | } |
| 3451 | } else { |
| 3452 | // The then label was bound. |
| 3453 | Visit(node->then_statement()); |
| 3454 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3455 | |
| 3456 | } else if (has_else_stm) { |
| 3457 | ASSERT(!has_then_stm); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3458 | JumpTarget else_; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3459 | ControlDestination dest(&exit, &else_, false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3460 | LoadCondition(node->condition(), &dest, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3461 | |
| 3462 | if (dest.true_was_fall_through()) { |
| 3463 | // The exit label was bound. We may have dangling jumps to the |
| 3464 | // else part. |
| 3465 | if (else_.is_linked()) { |
| 3466 | exit.Unuse(); |
| 3467 | exit.Jump(); |
| 3468 | else_.Bind(); |
| 3469 | Visit(node->else_statement()); |
| 3470 | } |
| 3471 | } else { |
| 3472 | // The else label was bound. |
| 3473 | Visit(node->else_statement()); |
| 3474 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3475 | |
| 3476 | } else { |
| 3477 | ASSERT(!has_then_stm && !has_else_stm); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3478 | // We only care about the condition's side effects (not its value |
| 3479 | // or control flow effect). LoadCondition is called without |
| 3480 | // forcing control flow. |
| 3481 | ControlDestination dest(&exit, &exit, true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3482 | LoadCondition(node->condition(), &dest, false); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3483 | if (!dest.is_used()) { |
| 3484 | // We got a value on the frame rather than (or in addition to) |
| 3485 | // control flow. |
| 3486 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3487 | } |
| 3488 | } |
| 3489 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3490 | if (exit.is_linked()) { |
| 3491 | exit.Bind(); |
| 3492 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3493 | } |
| 3494 | |
| 3495 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3496 | void CodeGenerator::VisitContinueStatement(ContinueStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3497 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3498 | Comment cmnt(masm_, "[ ContinueStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3499 | CodeForStatementPosition(node); |
| 3500 | node->target()->continue_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3501 | } |
| 3502 | |
| 3503 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3504 | void CodeGenerator::VisitBreakStatement(BreakStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3505 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3506 | Comment cmnt(masm_, "[ BreakStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3507 | CodeForStatementPosition(node); |
| 3508 | node->target()->break_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3509 | } |
| 3510 | |
| 3511 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3512 | void CodeGenerator::VisitReturnStatement(ReturnStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3513 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3514 | Comment cmnt(masm_, "[ ReturnStatement"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3515 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3516 | CodeForStatementPosition(node); |
| 3517 | Load(node->expression()); |
| 3518 | Result return_value = frame_->Pop(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3519 | masm()->WriteRecordedPositions(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3520 | if (function_return_is_shadowed_) { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3521 | function_return_.Jump(&return_value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3522 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3523 | frame_->PrepareForReturn(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3524 | if (function_return_.is_bound()) { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3525 | // If the function return label is already bound we reuse the |
| 3526 | // code by jumping to the return site. |
| 3527 | function_return_.Jump(&return_value); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3528 | } else { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3529 | function_return_.Bind(&return_value); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3530 | GenerateReturnSequence(&return_value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3531 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3532 | } |
| 3533 | } |
| 3534 | |
| 3535 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3536 | void CodeGenerator::GenerateReturnSequence(Result* return_value) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3537 | // The return value is a live (but not currently reference counted) |
| 3538 | // reference to eax. This is safe because the current frame does not |
| 3539 | // contain a reference to eax (it is prepared for the return by spilling |
| 3540 | // all registers). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3541 | if (FLAG_trace) { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3542 | frame_->Push(return_value); |
| 3543 | *return_value = frame_->CallRuntime(Runtime::kTraceExit, 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3544 | } |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 3545 | return_value->ToRegister(eax); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3546 | |
| 3547 | // Add a label for checking the size of the code used for returning. |
| 3548 | Label check_exit_codesize; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 3549 | masm_->bind(&check_exit_codesize); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3550 | |
| 3551 | // Leave the frame and return popping the arguments and the |
| 3552 | // receiver. |
| 3553 | frame_->Exit(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3554 | masm_->ret((scope()->num_parameters() + 1) * kPointerSize); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3555 | DeleteFrame(); |
| 3556 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3557 | #ifdef ENABLE_DEBUGGER_SUPPORT |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3558 | // Check that the size of the code used for returning matches what is |
| 3559 | // expected by the debugger. |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3560 | ASSERT_EQ(Assembler::kJSReturnSequenceLength, |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 3561 | masm_->SizeOfCodeGeneratedSince(&check_exit_codesize)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3562 | #endif |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3563 | } |
| 3564 | |
| 3565 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3566 | void CodeGenerator::VisitWithEnterStatement(WithEnterStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3567 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3568 | Comment cmnt(masm_, "[ WithEnterStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3569 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3570 | Load(node->expression()); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 3571 | Result context; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3572 | if (node->is_catch_block()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3573 | context = frame_->CallRuntime(Runtime::kPushCatchContext, 1); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3574 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3575 | context = frame_->CallRuntime(Runtime::kPushContext, 1); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3576 | } |
| 3577 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3578 | // Update context local. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3579 | frame_->SaveContextRegister(); |
| 3580 | |
| 3581 | // Verify that the runtime call result and esi agree. |
| 3582 | if (FLAG_debug_code) { |
| 3583 | __ cmp(context.reg(), Operand(esi)); |
| 3584 | __ Assert(equal, "Runtime::NewContext should end up in esi"); |
| 3585 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3586 | } |
| 3587 | |
| 3588 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3589 | void CodeGenerator::VisitWithExitStatement(WithExitStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3590 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3591 | Comment cmnt(masm_, "[ WithExitStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3592 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3593 | // Pop context. |
| 3594 | __ mov(esi, ContextOperand(esi, Context::PREVIOUS_INDEX)); |
| 3595 | // Update context local. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3596 | frame_->SaveContextRegister(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3597 | } |
| 3598 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3599 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3600 | void CodeGenerator::VisitSwitchStatement(SwitchStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3601 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3602 | Comment cmnt(masm_, "[ SwitchStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3603 | CodeForStatementPosition(node); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3604 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3605 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3606 | // Compile the switch value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3607 | Load(node->tag()); |
| 3608 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3609 | ZoneList<CaseClause*>* cases = node->cases(); |
| 3610 | int length = cases->length(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3611 | CaseClause* default_clause = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3612 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3613 | JumpTarget next_test; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3614 | // Compile the case label expressions and comparisons. Exit early |
| 3615 | // if a comparison is unconditionally true. The target next_test is |
| 3616 | // bound before the loop in order to indicate control flow to the |
| 3617 | // first comparison. |
| 3618 | next_test.Bind(); |
| 3619 | for (int i = 0; i < length && !next_test.is_unused(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3620 | CaseClause* clause = cases->at(i); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3621 | // The default is not a test, but remember it for later. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3622 | if (clause->is_default()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3623 | default_clause = clause; |
| 3624 | continue; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3625 | } |
| 3626 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3627 | Comment cmnt(masm_, "[ Case comparison"); |
| 3628 | // We recycle the same target next_test for each test. Bind it if |
| 3629 | // the previous test has not done so and then unuse it for the |
| 3630 | // loop. |
| 3631 | if (next_test.is_linked()) { |
| 3632 | next_test.Bind(); |
| 3633 | } |
| 3634 | next_test.Unuse(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3635 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3636 | // Duplicate the switch value. |
| 3637 | frame_->Dup(); |
| 3638 | |
| 3639 | // Compile the label expression. |
| 3640 | Load(clause->label()); |
| 3641 | |
| 3642 | // Compare and branch to the body if true or the next test if |
| 3643 | // false. Prefer the next test as a fall through. |
| 3644 | ControlDestination dest(clause->body_target(), &next_test, false); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 3645 | Comparison(node, equal, true, &dest); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3646 | |
| 3647 | // If the comparison fell through to the true target, jump to the |
| 3648 | // actual body. |
| 3649 | if (dest.true_was_fall_through()) { |
| 3650 | clause->body_target()->Unuse(); |
| 3651 | clause->body_target()->Jump(); |
| 3652 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3653 | } |
| 3654 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3655 | // If there was control flow to a next test from the last one |
| 3656 | // compiled, compile a jump to the default or break target. |
| 3657 | if (!next_test.is_unused()) { |
| 3658 | if (next_test.is_linked()) { |
| 3659 | next_test.Bind(); |
| 3660 | } |
| 3661 | // Drop the switch value. |
| 3662 | frame_->Drop(); |
| 3663 | if (default_clause != NULL) { |
| 3664 | default_clause->body_target()->Jump(); |
| 3665 | } else { |
| 3666 | node->break_target()->Jump(); |
| 3667 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3668 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3669 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3670 | |
| 3671 | // The last instruction emitted was a jump, either to the default |
| 3672 | // clause or the break target, or else to a case body from the loop |
| 3673 | // that compiles the tests. |
| 3674 | ASSERT(!has_valid_frame()); |
| 3675 | // Compile case bodies as needed. |
| 3676 | for (int i = 0; i < length; i++) { |
| 3677 | CaseClause* clause = cases->at(i); |
| 3678 | |
| 3679 | // There are two ways to reach the body: from the corresponding |
| 3680 | // test or as the fall through of the previous body. |
| 3681 | if (clause->body_target()->is_linked() || has_valid_frame()) { |
| 3682 | if (clause->body_target()->is_linked()) { |
| 3683 | if (has_valid_frame()) { |
| 3684 | // If we have both a jump to the test and a fall through, put |
| 3685 | // a jump on the fall through path to avoid the dropping of |
| 3686 | // the switch value on the test path. The exception is the |
| 3687 | // default which has already had the switch value dropped. |
| 3688 | if (clause->is_default()) { |
| 3689 | clause->body_target()->Bind(); |
| 3690 | } else { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3691 | JumpTarget body; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3692 | body.Jump(); |
| 3693 | clause->body_target()->Bind(); |
| 3694 | frame_->Drop(); |
| 3695 | body.Bind(); |
| 3696 | } |
| 3697 | } else { |
| 3698 | // No fall through to worry about. |
| 3699 | clause->body_target()->Bind(); |
| 3700 | if (!clause->is_default()) { |
| 3701 | frame_->Drop(); |
| 3702 | } |
| 3703 | } |
| 3704 | } else { |
| 3705 | // Otherwise, we have only fall through. |
| 3706 | ASSERT(has_valid_frame()); |
| 3707 | } |
| 3708 | |
| 3709 | // We are now prepared to compile the body. |
| 3710 | Comment cmnt(masm_, "[ Case body"); |
| 3711 | VisitStatements(clause->statements()); |
| 3712 | } |
| 3713 | clause->body_target()->Unuse(); |
| 3714 | } |
| 3715 | |
| 3716 | // We may not have a valid frame here so bind the break target only |
| 3717 | // if needed. |
| 3718 | if (node->break_target()->is_linked()) { |
| 3719 | node->break_target()->Bind(); |
| 3720 | } |
| 3721 | node->break_target()->Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3722 | } |
| 3723 | |
| 3724 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3725 | void CodeGenerator::VisitDoWhileStatement(DoWhileStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3726 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3727 | Comment cmnt(masm_, "[ DoWhileStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3728 | CodeForStatementPosition(node); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3729 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3730 | JumpTarget body(JumpTarget::BIDIRECTIONAL); |
| 3731 | IncrementLoopNesting(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3732 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3733 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 3734 | // Label the top of the loop for the backward jump if necessary. |
| 3735 | switch (info) { |
| 3736 | case ALWAYS_TRUE: |
| 3737 | // Use the continue target. |
| 3738 | node->continue_target()->set_direction(JumpTarget::BIDIRECTIONAL); |
| 3739 | node->continue_target()->Bind(); |
| 3740 | break; |
| 3741 | case ALWAYS_FALSE: |
| 3742 | // No need to label it. |
| 3743 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3744 | break; |
| 3745 | case DONT_KNOW: |
| 3746 | // Continue is the test, so use the backward body target. |
| 3747 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3748 | body.Bind(); |
| 3749 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3750 | } |
| 3751 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3752 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 3753 | Visit(node->body()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3754 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3755 | // Compile the test. |
| 3756 | switch (info) { |
| 3757 | case ALWAYS_TRUE: |
| 3758 | // If control flow can fall off the end of the body, jump back to |
| 3759 | // the top and bind the break target at the exit. |
| 3760 | if (has_valid_frame()) { |
| 3761 | node->continue_target()->Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3762 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3763 | if (node->break_target()->is_linked()) { |
| 3764 | node->break_target()->Bind(); |
| 3765 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3766 | break; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3767 | case ALWAYS_FALSE: |
| 3768 | // We may have had continues or breaks in the body. |
| 3769 | if (node->continue_target()->is_linked()) { |
| 3770 | node->continue_target()->Bind(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3771 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3772 | if (node->break_target()->is_linked()) { |
| 3773 | node->break_target()->Bind(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3774 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3775 | break; |
| 3776 | case DONT_KNOW: |
| 3777 | // We have to compile the test expression if it can be reached by |
| 3778 | // control flow falling out of the body or via continue. |
| 3779 | if (node->continue_target()->is_linked()) { |
| 3780 | node->continue_target()->Bind(); |
| 3781 | } |
| 3782 | if (has_valid_frame()) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3783 | Comment cmnt(masm_, "[ DoWhileCondition"); |
| 3784 | CodeForDoWhileConditionPosition(node); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3785 | ControlDestination dest(&body, node->break_target(), false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3786 | LoadCondition(node->cond(), &dest, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3787 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3788 | if (node->break_target()->is_linked()) { |
| 3789 | node->break_target()->Bind(); |
| 3790 | } |
| 3791 | break; |
| 3792 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3793 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3794 | DecrementLoopNesting(); |
| 3795 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3796 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3797 | |
| 3798 | void CodeGenerator::VisitWhileStatement(WhileStatement* node) { |
| 3799 | ASSERT(!in_spilled_code()); |
| 3800 | Comment cmnt(masm_, "[ WhileStatement"); |
| 3801 | CodeForStatementPosition(node); |
| 3802 | |
| 3803 | // If the condition is always false and has no side effects, we do not |
| 3804 | // need to compile anything. |
| 3805 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 3806 | if (info == ALWAYS_FALSE) return; |
| 3807 | |
| 3808 | // Do not duplicate conditions that may have function literal |
| 3809 | // subexpressions. This can cause us to compile the function literal |
| 3810 | // twice. |
| 3811 | bool test_at_bottom = !node->may_have_function_literal(); |
| 3812 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3813 | IncrementLoopNesting(); |
| 3814 | JumpTarget body; |
| 3815 | if (test_at_bottom) { |
| 3816 | body.set_direction(JumpTarget::BIDIRECTIONAL); |
| 3817 | } |
| 3818 | |
| 3819 | // Based on the condition analysis, compile the test as necessary. |
| 3820 | switch (info) { |
| 3821 | case ALWAYS_TRUE: |
| 3822 | // We will not compile the test expression. Label the top of the |
| 3823 | // loop with the continue target. |
| 3824 | node->continue_target()->set_direction(JumpTarget::BIDIRECTIONAL); |
| 3825 | node->continue_target()->Bind(); |
| 3826 | break; |
| 3827 | case DONT_KNOW: { |
| 3828 | if (test_at_bottom) { |
| 3829 | // Continue is the test at the bottom, no need to label the test |
| 3830 | // at the top. The body is a backward target. |
| 3831 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3832 | } else { |
| 3833 | // Label the test at the top as the continue target. The body |
| 3834 | // is a forward-only target. |
| 3835 | node->continue_target()->set_direction(JumpTarget::BIDIRECTIONAL); |
| 3836 | node->continue_target()->Bind(); |
| 3837 | } |
| 3838 | // Compile the test with the body as the true target and preferred |
| 3839 | // fall-through and with the break target as the false target. |
| 3840 | ControlDestination dest(&body, node->break_target(), true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3841 | LoadCondition(node->cond(), &dest, true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3842 | |
| 3843 | if (dest.false_was_fall_through()) { |
| 3844 | // If we got the break target as fall-through, the test may have |
| 3845 | // been unconditionally false (if there are no jumps to the |
| 3846 | // body). |
| 3847 | if (!body.is_linked()) { |
| 3848 | DecrementLoopNesting(); |
| 3849 | return; |
| 3850 | } |
| 3851 | |
| 3852 | // Otherwise, jump around the body on the fall through and then |
| 3853 | // bind the body target. |
| 3854 | node->break_target()->Unuse(); |
| 3855 | node->break_target()->Jump(); |
| 3856 | body.Bind(); |
| 3857 | } |
| 3858 | break; |
| 3859 | } |
| 3860 | case ALWAYS_FALSE: |
| 3861 | UNREACHABLE(); |
| 3862 | break; |
| 3863 | } |
| 3864 | |
| 3865 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 3866 | Visit(node->body()); |
| 3867 | |
| 3868 | // Based on the condition analysis, compile the backward jump as |
| 3869 | // necessary. |
| 3870 | switch (info) { |
| 3871 | case ALWAYS_TRUE: |
| 3872 | // The loop body has been labeled with the continue target. |
| 3873 | if (has_valid_frame()) { |
| 3874 | node->continue_target()->Jump(); |
| 3875 | } |
| 3876 | break; |
| 3877 | case DONT_KNOW: |
| 3878 | if (test_at_bottom) { |
| 3879 | // If we have chosen to recompile the test at the bottom, then |
| 3880 | // it is the continue target. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3881 | if (node->continue_target()->is_linked()) { |
| 3882 | node->continue_target()->Bind(); |
| 3883 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3884 | if (has_valid_frame()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3885 | // The break target is the fall-through (body is a backward |
| 3886 | // jump from here and thus an invalid fall-through). |
| 3887 | ControlDestination dest(&body, node->break_target(), false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3888 | LoadCondition(node->cond(), &dest, true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3889 | } |
| 3890 | } else { |
| 3891 | // If we have chosen not to recompile the test at the bottom, |
| 3892 | // jump back to the one at the top. |
| 3893 | if (has_valid_frame()) { |
| 3894 | node->continue_target()->Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3895 | } |
| 3896 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3897 | break; |
| 3898 | case ALWAYS_FALSE: |
| 3899 | UNREACHABLE(); |
| 3900 | break; |
| 3901 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3902 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3903 | // The break target may be already bound (by the condition), or there |
| 3904 | // may not be a valid frame. Bind it only if needed. |
| 3905 | if (node->break_target()->is_linked()) { |
| 3906 | node->break_target()->Bind(); |
| 3907 | } |
| 3908 | DecrementLoopNesting(); |
| 3909 | } |
| 3910 | |
| 3911 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 3912 | void CodeGenerator::SetTypeForStackSlot(Slot* slot, TypeInfo info) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 3913 | ASSERT(slot->type() == Slot::LOCAL || slot->type() == Slot::PARAMETER); |
| 3914 | if (slot->type() == Slot::LOCAL) { |
| 3915 | frame_->SetTypeForLocalAt(slot->index(), info); |
| 3916 | } else { |
| 3917 | frame_->SetTypeForParamAt(slot->index(), info); |
| 3918 | } |
| 3919 | if (FLAG_debug_code && info.IsSmi()) { |
| 3920 | if (slot->type() == Slot::LOCAL) { |
| 3921 | frame_->PushLocalAt(slot->index()); |
| 3922 | } else { |
| 3923 | frame_->PushParameterAt(slot->index()); |
| 3924 | } |
| 3925 | Result var = frame_->Pop(); |
| 3926 | var.ToRegister(); |
| 3927 | __ AbortIfNotSmi(var.reg()); |
| 3928 | } |
| 3929 | } |
| 3930 | |
| 3931 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3932 | void CodeGenerator::VisitForStatement(ForStatement* node) { |
| 3933 | ASSERT(!in_spilled_code()); |
| 3934 | Comment cmnt(masm_, "[ ForStatement"); |
| 3935 | CodeForStatementPosition(node); |
| 3936 | |
| 3937 | // Compile the init expression if present. |
| 3938 | if (node->init() != NULL) { |
| 3939 | Visit(node->init()); |
| 3940 | } |
| 3941 | |
| 3942 | // If the condition is always false and has no side effects, we do not |
| 3943 | // need to compile anything else. |
| 3944 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 3945 | if (info == ALWAYS_FALSE) return; |
| 3946 | |
| 3947 | // Do not duplicate conditions that may have function literal |
| 3948 | // subexpressions. This can cause us to compile the function literal |
| 3949 | // twice. |
| 3950 | bool test_at_bottom = !node->may_have_function_literal(); |
| 3951 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3952 | IncrementLoopNesting(); |
| 3953 | |
| 3954 | // Target for backward edge if no test at the bottom, otherwise |
| 3955 | // unused. |
| 3956 | JumpTarget loop(JumpTarget::BIDIRECTIONAL); |
| 3957 | |
| 3958 | // Target for backward edge if there is a test at the bottom, |
| 3959 | // otherwise used as target for test at the top. |
| 3960 | JumpTarget body; |
| 3961 | if (test_at_bottom) { |
| 3962 | body.set_direction(JumpTarget::BIDIRECTIONAL); |
| 3963 | } |
| 3964 | |
| 3965 | // Based on the condition analysis, compile the test as necessary. |
| 3966 | switch (info) { |
| 3967 | case ALWAYS_TRUE: |
| 3968 | // We will not compile the test expression. Label the top of the |
| 3969 | // loop. |
| 3970 | if (node->next() == NULL) { |
| 3971 | // Use the continue target if there is no update expression. |
| 3972 | node->continue_target()->set_direction(JumpTarget::BIDIRECTIONAL); |
| 3973 | node->continue_target()->Bind(); |
| 3974 | } else { |
| 3975 | // Otherwise use the backward loop target. |
| 3976 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3977 | loop.Bind(); |
| 3978 | } |
| 3979 | break; |
| 3980 | case DONT_KNOW: { |
| 3981 | if (test_at_bottom) { |
| 3982 | // Continue is either the update expression or the test at the |
| 3983 | // bottom, no need to label the test at the top. |
| 3984 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3985 | } else if (node->next() == NULL) { |
| 3986 | // We are not recompiling the test at the bottom and there is no |
| 3987 | // update expression. |
| 3988 | node->continue_target()->set_direction(JumpTarget::BIDIRECTIONAL); |
| 3989 | node->continue_target()->Bind(); |
| 3990 | } else { |
| 3991 | // We are not recompiling the test at the bottom and there is an |
| 3992 | // update expression. |
| 3993 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 3994 | loop.Bind(); |
| 3995 | } |
| 3996 | // Compile the test with the body as the true target and preferred |
| 3997 | // fall-through and with the break target as the false target. |
| 3998 | ControlDestination dest(&body, node->break_target(), true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 3999 | LoadCondition(node->cond(), &dest, true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4000 | |
| 4001 | if (dest.false_was_fall_through()) { |
| 4002 | // If we got the break target as fall-through, the test may have |
| 4003 | // been unconditionally false (if there are no jumps to the |
| 4004 | // body). |
| 4005 | if (!body.is_linked()) { |
| 4006 | DecrementLoopNesting(); |
| 4007 | return; |
| 4008 | } |
| 4009 | |
| 4010 | // Otherwise, jump around the body on the fall through and then |
| 4011 | // bind the body target. |
| 4012 | node->break_target()->Unuse(); |
| 4013 | node->break_target()->Jump(); |
| 4014 | body.Bind(); |
| 4015 | } |
| 4016 | break; |
| 4017 | } |
| 4018 | case ALWAYS_FALSE: |
| 4019 | UNREACHABLE(); |
| 4020 | break; |
| 4021 | } |
| 4022 | |
| 4023 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 4024 | |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 4025 | // We know that the loop index is a smi if it is not modified in the |
| 4026 | // loop body and it is checked against a constant limit in the loop |
| 4027 | // condition. In this case, we reset the static type information of the |
| 4028 | // loop index to smi before compiling the body, the update expression, and |
| 4029 | // the bottom check of the loop condition. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 4030 | if (node->is_fast_smi_loop()) { |
| 4031 | // Set number type of the loop variable to smi. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 4032 | SetTypeForStackSlot(node->loop_variable()->slot(), TypeInfo::Smi()); |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 4033 | } |
| 4034 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4035 | Visit(node->body()); |
| 4036 | |
| 4037 | // If there is an update expression, compile it if necessary. |
| 4038 | if (node->next() != NULL) { |
| 4039 | if (node->continue_target()->is_linked()) { |
| 4040 | node->continue_target()->Bind(); |
| 4041 | } |
| 4042 | |
| 4043 | // Control can reach the update by falling out of the body or by a |
| 4044 | // continue. |
| 4045 | if (has_valid_frame()) { |
| 4046 | // Record the source position of the statement as this code which |
| 4047 | // is after the code for the body actually belongs to the loop |
| 4048 | // statement and not the body. |
| 4049 | CodeForStatementPosition(node); |
| 4050 | Visit(node->next()); |
| 4051 | } |
| 4052 | } |
| 4053 | |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 4054 | // Set the type of the loop variable to smi before compiling the test |
| 4055 | // expression if we are in a fast smi loop condition. |
fschneider@chromium.org | aae9ef2 | 2010-03-18 14:38:11 +0000 | [diff] [blame] | 4056 | if (node->is_fast_smi_loop() && has_valid_frame()) { |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 4057 | // Set number type of the loop variable to smi. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 4058 | SetTypeForStackSlot(node->loop_variable()->slot(), TypeInfo::Smi()); |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 4059 | } |
| 4060 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4061 | // Based on the condition analysis, compile the backward jump as |
| 4062 | // necessary. |
| 4063 | switch (info) { |
| 4064 | case ALWAYS_TRUE: |
| 4065 | if (has_valid_frame()) { |
| 4066 | if (node->next() == NULL) { |
| 4067 | node->continue_target()->Jump(); |
| 4068 | } else { |
| 4069 | loop.Jump(); |
| 4070 | } |
| 4071 | } |
| 4072 | break; |
| 4073 | case DONT_KNOW: |
| 4074 | if (test_at_bottom) { |
| 4075 | if (node->continue_target()->is_linked()) { |
| 4076 | // We can have dangling jumps to the continue target if there |
| 4077 | // was no update expression. |
| 4078 | node->continue_target()->Bind(); |
| 4079 | } |
| 4080 | // Control can reach the test at the bottom by falling out of |
| 4081 | // the body, by a continue in the body, or from the update |
| 4082 | // expression. |
| 4083 | if (has_valid_frame()) { |
| 4084 | // The break target is the fall-through (body is a backward |
| 4085 | // jump from here). |
| 4086 | ControlDestination dest(&body, node->break_target(), false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4087 | LoadCondition(node->cond(), &dest, true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4088 | } |
| 4089 | } else { |
| 4090 | // Otherwise, jump back to the test at the top. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4091 | if (has_valid_frame()) { |
| 4092 | if (node->next() == NULL) { |
| 4093 | node->continue_target()->Jump(); |
| 4094 | } else { |
| 4095 | loop.Jump(); |
| 4096 | } |
| 4097 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4098 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4099 | break; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4100 | case ALWAYS_FALSE: |
| 4101 | UNREACHABLE(); |
| 4102 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4103 | } |
| 4104 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4105 | // The break target may be already bound (by the condition), or |
| 4106 | // there may not be a valid frame. Bind it only if needed. |
| 4107 | if (node->break_target()->is_linked()) { |
| 4108 | node->break_target()->Bind(); |
| 4109 | } |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4110 | DecrementLoopNesting(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4111 | } |
| 4112 | |
| 4113 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4114 | void CodeGenerator::VisitForInStatement(ForInStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4115 | ASSERT(!in_spilled_code()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4116 | VirtualFrame::SpilledScope spilled_scope; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4117 | Comment cmnt(masm_, "[ ForInStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4118 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4119 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4120 | JumpTarget primitive; |
| 4121 | JumpTarget jsobject; |
| 4122 | JumpTarget fixed_array; |
| 4123 | JumpTarget entry(JumpTarget::BIDIRECTIONAL); |
| 4124 | JumpTarget end_del_check; |
| 4125 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4126 | |
| 4127 | // Get the object to enumerate over (converted to JSObject). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4128 | LoadAndSpill(node->enumerable()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4129 | |
| 4130 | // Both SpiderMonkey and kjs ignore null and undefined in contrast |
| 4131 | // to the specification. 12.6.4 mandates a call to ToObject. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4132 | frame_->EmitPop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4133 | |
| 4134 | // eax: value to be iterated over |
| 4135 | __ cmp(eax, Factory::undefined_value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4136 | exit.Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4137 | __ cmp(eax, Factory::null_value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4138 | exit.Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4139 | |
| 4140 | // Stack layout in body: |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4141 | // [iteration counter (smi)] <- slot 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4142 | // [length of array] <- slot 1 |
| 4143 | // [FixedArray] <- slot 2 |
| 4144 | // [Map or 0] <- slot 3 |
| 4145 | // [Object] <- slot 4 |
| 4146 | |
| 4147 | // Check if enumerable is already a JSObject |
| 4148 | // eax: value to be iterated over |
| 4149 | __ test(eax, Immediate(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4150 | primitive.Branch(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4151 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4152 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 4153 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4154 | jsobject.Branch(above_equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4155 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4156 | primitive.Bind(); |
| 4157 | frame_->EmitPush(eax); |
| 4158 | frame_->InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4159 | // function call returns the value in eax, which is where we want it below |
| 4160 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4161 | jsobject.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4162 | // Get the set of properties (as a FixedArray or Map). |
| 4163 | // eax: value to be iterated over |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4164 | frame_->EmitPush(eax); // Push the object being iterated over. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4165 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4166 | // Check cache validity in generated code. This is a fast case for |
| 4167 | // the JSObject::IsSimpleEnum cache validity checks. If we cannot |
| 4168 | // guarantee cache validity, call the runtime system to check cache |
| 4169 | // validity or get the property names in a fixed array. |
| 4170 | JumpTarget call_runtime; |
| 4171 | JumpTarget loop(JumpTarget::BIDIRECTIONAL); |
| 4172 | JumpTarget check_prototype; |
| 4173 | JumpTarget use_cache; |
| 4174 | __ mov(ecx, eax); |
| 4175 | loop.Bind(); |
| 4176 | // Check that there are no elements. |
| 4177 | __ mov(edx, FieldOperand(ecx, JSObject::kElementsOffset)); |
| 4178 | __ cmp(Operand(edx), Immediate(Factory::empty_fixed_array())); |
| 4179 | call_runtime.Branch(not_equal); |
| 4180 | // Check that instance descriptors are not empty so that we can |
| 4181 | // check for an enum cache. Leave the map in ebx for the subsequent |
| 4182 | // prototype load. |
| 4183 | __ mov(ebx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 4184 | __ mov(edx, FieldOperand(ebx, Map::kInstanceDescriptorsOffset)); |
| 4185 | __ cmp(Operand(edx), Immediate(Factory::empty_descriptor_array())); |
| 4186 | call_runtime.Branch(equal); |
| 4187 | // Check that there in an enum cache in the non-empty instance |
| 4188 | // descriptors. This is the case if the next enumeration index |
| 4189 | // field does not contain a smi. |
| 4190 | __ mov(edx, FieldOperand(edx, DescriptorArray::kEnumerationIndexOffset)); |
| 4191 | __ test(edx, Immediate(kSmiTagMask)); |
| 4192 | call_runtime.Branch(zero); |
| 4193 | // For all objects but the receiver, check that the cache is empty. |
| 4194 | __ cmp(ecx, Operand(eax)); |
| 4195 | check_prototype.Branch(equal); |
| 4196 | __ mov(edx, FieldOperand(edx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 4197 | __ cmp(Operand(edx), Immediate(Factory::empty_fixed_array())); |
| 4198 | call_runtime.Branch(not_equal); |
| 4199 | check_prototype.Bind(); |
| 4200 | // Load the prototype from the map and loop if non-null. |
| 4201 | __ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset)); |
| 4202 | __ cmp(Operand(ecx), Immediate(Factory::null_value())); |
| 4203 | loop.Branch(not_equal); |
| 4204 | // The enum cache is valid. Load the map of the object being |
| 4205 | // iterated over and use the cache for the iteration. |
| 4206 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4207 | use_cache.Jump(); |
| 4208 | |
| 4209 | call_runtime.Bind(); |
| 4210 | // Call the runtime to get the property names for the object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4211 | frame_->EmitPush(eax); // push the Object (slot 4) for the runtime call |
| 4212 | frame_->CallRuntime(Runtime::kGetPropertyNamesFast, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4213 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4214 | // If we got a map from the runtime call, we can do a fast |
| 4215 | // modification check. Otherwise, we got a fixed array, and we have |
| 4216 | // to do a slow check. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4217 | // eax: map or fixed array (result from call to |
| 4218 | // Runtime::kGetPropertyNamesFast) |
| 4219 | __ mov(edx, Operand(eax)); |
| 4220 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 4221 | __ cmp(ecx, Factory::meta_map()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4222 | fixed_array.Branch(not_equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4223 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4224 | use_cache.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4225 | // Get enum cache |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4226 | // eax: map (either the result from a call to |
| 4227 | // Runtime::kGetPropertyNamesFast or has been fetched directly from |
| 4228 | // the object) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4229 | __ mov(ecx, Operand(eax)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4230 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4231 | __ mov(ecx, FieldOperand(ecx, Map::kInstanceDescriptorsOffset)); |
| 4232 | // Get the bridge array held in the enumeration index field. |
| 4233 | __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumerationIndexOffset)); |
| 4234 | // Get the cache from the bridge array. |
| 4235 | __ mov(edx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 4236 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4237 | frame_->EmitPush(eax); // <- slot 3 |
| 4238 | frame_->EmitPush(edx); // <- slot 2 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4239 | __ mov(eax, FieldOperand(edx, FixedArray::kLengthOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4240 | frame_->EmitPush(eax); // <- slot 1 |
| 4241 | frame_->EmitPush(Immediate(Smi::FromInt(0))); // <- slot 0 |
| 4242 | entry.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4243 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4244 | fixed_array.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4245 | // eax: fixed array (result from call to Runtime::kGetPropertyNamesFast) |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4246 | frame_->EmitPush(Immediate(Smi::FromInt(0))); // <- slot 3 |
| 4247 | frame_->EmitPush(eax); // <- slot 2 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4248 | |
| 4249 | // Push the length of the array and the initial index onto the stack. |
| 4250 | __ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4251 | frame_->EmitPush(eax); // <- slot 1 |
| 4252 | frame_->EmitPush(Immediate(Smi::FromInt(0))); // <- slot 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4253 | |
| 4254 | // Condition. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4255 | entry.Bind(); |
| 4256 | // Grab the current frame's height for the break and continue |
| 4257 | // targets only after all the state is pushed on the frame. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4258 | node->break_target()->set_direction(JumpTarget::FORWARD_ONLY); |
| 4259 | node->continue_target()->set_direction(JumpTarget::FORWARD_ONLY); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4260 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4261 | __ mov(eax, frame_->ElementAt(0)); // load the current count |
| 4262 | __ cmp(eax, frame_->ElementAt(1)); // compare to the array length |
| 4263 | node->break_target()->Branch(above_equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4264 | |
| 4265 | // Get the i'th entry of the array. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4266 | __ mov(edx, frame_->ElementAt(2)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 4267 | __ mov(ebx, FixedArrayElementOperand(edx, eax)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4268 | |
| 4269 | // Get the expected map from the stack or a zero map in the |
| 4270 | // permanent slow case eax: current iteration count ebx: i'th entry |
| 4271 | // of the enum cache |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4272 | __ mov(edx, frame_->ElementAt(3)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4273 | // Check if the expected map still matches that of the enumerable. |
| 4274 | // If not, we have to filter the key. |
| 4275 | // eax: current iteration count |
| 4276 | // ebx: i'th entry of the enum cache |
| 4277 | // edx: expected map value |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4278 | __ mov(ecx, frame_->ElementAt(4)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4279 | __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 4280 | __ cmp(ecx, Operand(edx)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4281 | end_del_check.Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4282 | |
| 4283 | // Convert the entry to a string (or null if it isn't a property anymore). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4284 | frame_->EmitPush(frame_->ElementAt(4)); // push enumerable |
| 4285 | frame_->EmitPush(ebx); // push entry |
| 4286 | frame_->InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4287 | __ mov(ebx, Operand(eax)); |
| 4288 | |
| 4289 | // If the property has been removed while iterating, we just skip it. |
| 4290 | __ cmp(ebx, Factory::null_value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4291 | node->continue_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4292 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4293 | end_del_check.Bind(); |
| 4294 | // Store the entry in the 'each' expression and take another spin in the |
| 4295 | // loop. edx: i'th entry of the enum cache (or string there of) |
| 4296 | frame_->EmitPush(ebx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4297 | { Reference each(this, node->each()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4298 | // Loading a reference may leave the frame in an unspilled state. |
| 4299 | frame_->SpillAll(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4300 | if (!each.is_illegal()) { |
| 4301 | if (each.size() > 0) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4302 | frame_->EmitPush(frame_->ElementAt(each.size())); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4303 | each.SetValue(NOT_CONST_INIT); |
| 4304 | frame_->Drop(2); |
| 4305 | } else { |
| 4306 | // If the reference was to a slot we rely on the convenient property |
| 4307 | // that it doesn't matter whether a value (eg, ebx pushed above) is |
| 4308 | // right on top of or right underneath a zero-sized reference. |
| 4309 | each.SetValue(NOT_CONST_INIT); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4310 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4311 | } |
| 4312 | } |
| 4313 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4314 | // Unloading a reference may leave the frame in an unspilled state. |
| 4315 | frame_->SpillAll(); |
| 4316 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4317 | // Body. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4318 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4319 | VisitAndSpill(node->body()); |
| 4320 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 4321 | // Next. Reestablish a spilled frame in case we are coming here via |
| 4322 | // a continue in the body. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4323 | node->continue_target()->Bind(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 4324 | frame_->SpillAll(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4325 | frame_->EmitPop(eax); |
| 4326 | __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| 4327 | frame_->EmitPush(eax); |
| 4328 | entry.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4329 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 4330 | // Cleanup. No need to spill because VirtualFrame::Drop is safe for |
| 4331 | // any frame. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4332 | node->break_target()->Bind(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4333 | frame_->Drop(5); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4334 | |
| 4335 | // Exit. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4336 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4337 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4338 | node->continue_target()->Unuse(); |
| 4339 | node->break_target()->Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4340 | } |
| 4341 | |
| 4342 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4343 | void CodeGenerator::VisitTryCatchStatement(TryCatchStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4344 | ASSERT(!in_spilled_code()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4345 | VirtualFrame::SpilledScope spilled_scope; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4346 | Comment cmnt(masm_, "[ TryCatchStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4347 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4348 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4349 | JumpTarget try_block; |
| 4350 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4351 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4352 | try_block.Call(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4353 | // --- Catch block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4354 | frame_->EmitPush(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4355 | |
| 4356 | // Store the caught exception in the catch variable. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4357 | Variable* catch_var = node->catch_var()->var(); |
| 4358 | ASSERT(catch_var != NULL && catch_var->slot() != NULL); |
| 4359 | StoreToSlot(catch_var->slot(), NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4360 | |
| 4361 | // Remove the exception from the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4362 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4363 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4364 | VisitStatementsAndSpill(node->catch_block()->statements()); |
| 4365 | if (has_valid_frame()) { |
| 4366 | exit.Jump(); |
| 4367 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4368 | |
| 4369 | |
| 4370 | // --- Try block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4371 | try_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4372 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4373 | frame_->PushTryHandler(TRY_CATCH_HANDLER); |
| 4374 | int handler_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4375 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4376 | // Shadow the jump targets for all escapes from the try block, including |
| 4377 | // returns. During shadowing, the original target is hidden as the |
| 4378 | // ShadowTarget and operations on the original actually affect the |
| 4379 | // shadowing target. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4380 | // |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4381 | // We should probably try to unify the escaping targets and the return |
| 4382 | // target. |
| 4383 | int nof_escapes = node->escaping_targets()->length(); |
| 4384 | List<ShadowTarget*> shadows(1 + nof_escapes); |
| 4385 | |
| 4386 | // Add the shadow target for the function return. |
| 4387 | static const int kReturnShadowIndex = 0; |
| 4388 | shadows.Add(new ShadowTarget(&function_return_)); |
| 4389 | bool function_return_was_shadowed = function_return_is_shadowed_; |
| 4390 | function_return_is_shadowed_ = true; |
| 4391 | ASSERT(shadows[kReturnShadowIndex]->other_target() == &function_return_); |
| 4392 | |
| 4393 | // Add the remaining shadow targets. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4394 | for (int i = 0; i < nof_escapes; i++) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4395 | shadows.Add(new ShadowTarget(node->escaping_targets()->at(i))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4396 | } |
| 4397 | |
| 4398 | // Generate code for the statements in the try block. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4399 | VisitStatementsAndSpill(node->try_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4400 | |
| 4401 | // Stop the introduced shadowing and count the number of required unlinks. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4402 | // After shadowing stops, the original targets are unshadowed and the |
| 4403 | // ShadowTargets represent the formerly shadowing targets. |
| 4404 | bool has_unlinks = false; |
| 4405 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4406 | shadows[i]->StopShadowing(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4407 | has_unlinks = has_unlinks || shadows[i]->is_linked(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4408 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4409 | function_return_is_shadowed_ = function_return_was_shadowed; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4410 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4411 | // Get an external reference to the handler address. |
| 4412 | ExternalReference handler_address(Top::k_handler_address); |
| 4413 | |
| 4414 | // Make sure that there's nothing left on the stack above the |
| 4415 | // handler structure. |
| 4416 | if (FLAG_debug_code) { |
| 4417 | __ mov(eax, Operand::StaticVariable(handler_address)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4418 | __ cmp(esp, Operand(eax)); |
| 4419 | __ Assert(equal, "stack pointer should point to top handler"); |
| 4420 | } |
| 4421 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4422 | // If we can fall off the end of the try block, unlink from try chain. |
| 4423 | if (has_valid_frame()) { |
| 4424 | // The next handler address is on top of the frame. Unlink from |
| 4425 | // the handler list and drop the rest of this handler from the |
| 4426 | // frame. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4427 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4428 | frame_->EmitPop(Operand::StaticVariable(handler_address)); |
| 4429 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
| 4430 | if (has_unlinks) { |
| 4431 | exit.Jump(); |
| 4432 | } |
| 4433 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4434 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4435 | // Generate unlink code for the (formerly) shadowing targets that |
| 4436 | // have been jumped to. Deallocate each shadow target. |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 4437 | Result return_value; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4438 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4439 | if (shadows[i]->is_linked()) { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4440 | // Unlink from try chain; be careful not to destroy the TOS if |
| 4441 | // there is one. |
| 4442 | if (i == kReturnShadowIndex) { |
| 4443 | shadows[i]->Bind(&return_value); |
| 4444 | return_value.ToRegister(eax); |
| 4445 | } else { |
| 4446 | shadows[i]->Bind(); |
| 4447 | } |
| 4448 | // Because we can be jumping here (to spilled code) from |
| 4449 | // unspilled code, we need to reestablish a spilled frame at |
| 4450 | // this block. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4451 | frame_->SpillAll(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4452 | |
| 4453 | // Reload sp from the top handler, because some statements that we |
| 4454 | // break from (eg, for...in) may have left stuff on the stack. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4455 | __ mov(esp, Operand::StaticVariable(handler_address)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4456 | frame_->Forget(frame_->height() - handler_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4457 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4458 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4459 | frame_->EmitPop(Operand::StaticVariable(handler_address)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4460 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4461 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4462 | if (i == kReturnShadowIndex) { |
| 4463 | if (!function_return_is_shadowed_) frame_->PrepareForReturn(); |
| 4464 | shadows[i]->other_target()->Jump(&return_value); |
| 4465 | } else { |
| 4466 | shadows[i]->other_target()->Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4467 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4468 | } |
| 4469 | } |
| 4470 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4471 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4472 | } |
| 4473 | |
| 4474 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4475 | void CodeGenerator::VisitTryFinallyStatement(TryFinallyStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4476 | ASSERT(!in_spilled_code()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4477 | VirtualFrame::SpilledScope spilled_scope; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 4478 | Comment cmnt(masm_, "[ TryFinallyStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4479 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4480 | |
| 4481 | // State: Used to keep track of reason for entering the finally |
| 4482 | // block. Should probably be extended to hold information for |
| 4483 | // break/continue from within the try block. |
| 4484 | enum { FALLING, THROWING, JUMPING }; |
| 4485 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4486 | JumpTarget try_block; |
| 4487 | JumpTarget finally_block; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4488 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4489 | try_block.Call(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4490 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4491 | frame_->EmitPush(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4492 | // In case of thrown exceptions, this is where we continue. |
| 4493 | __ Set(ecx, Immediate(Smi::FromInt(THROWING))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4494 | finally_block.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4495 | |
| 4496 | // --- Try block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4497 | try_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4498 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4499 | frame_->PushTryHandler(TRY_FINALLY_HANDLER); |
| 4500 | int handler_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4501 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4502 | // Shadow the jump targets for all escapes from the try block, including |
| 4503 | // returns. During shadowing, the original target is hidden as the |
| 4504 | // ShadowTarget and operations on the original actually affect the |
| 4505 | // shadowing target. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4506 | // |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4507 | // We should probably try to unify the escaping targets and the return |
| 4508 | // target. |
| 4509 | int nof_escapes = node->escaping_targets()->length(); |
| 4510 | List<ShadowTarget*> shadows(1 + nof_escapes); |
| 4511 | |
| 4512 | // Add the shadow target for the function return. |
| 4513 | static const int kReturnShadowIndex = 0; |
| 4514 | shadows.Add(new ShadowTarget(&function_return_)); |
| 4515 | bool function_return_was_shadowed = function_return_is_shadowed_; |
| 4516 | function_return_is_shadowed_ = true; |
| 4517 | ASSERT(shadows[kReturnShadowIndex]->other_target() == &function_return_); |
| 4518 | |
| 4519 | // Add the remaining shadow targets. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4520 | for (int i = 0; i < nof_escapes; i++) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4521 | shadows.Add(new ShadowTarget(node->escaping_targets()->at(i))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4522 | } |
| 4523 | |
| 4524 | // Generate code for the statements in the try block. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4525 | VisitStatementsAndSpill(node->try_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4526 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4527 | // Stop the introduced shadowing and count the number of required unlinks. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4528 | // After shadowing stops, the original targets are unshadowed and the |
| 4529 | // ShadowTargets represent the formerly shadowing targets. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4530 | int nof_unlinks = 0; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4531 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4532 | shadows[i]->StopShadowing(); |
| 4533 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 4534 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4535 | function_return_is_shadowed_ = function_return_was_shadowed; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4536 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4537 | // Get an external reference to the handler address. |
| 4538 | ExternalReference handler_address(Top::k_handler_address); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4539 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4540 | // If we can fall off the end of the try block, unlink from the try |
| 4541 | // chain and set the state on the frame to FALLING. |
| 4542 | if (has_valid_frame()) { |
| 4543 | // The next handler address is on top of the frame. |
| 4544 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4545 | frame_->EmitPop(Operand::StaticVariable(handler_address)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4546 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
| 4547 | |
| 4548 | // Fake a top of stack value (unneeded when FALLING) and set the |
| 4549 | // state in ecx, then jump around the unlink blocks if any. |
| 4550 | frame_->EmitPush(Immediate(Factory::undefined_value())); |
| 4551 | __ Set(ecx, Immediate(Smi::FromInt(FALLING))); |
| 4552 | if (nof_unlinks > 0) { |
| 4553 | finally_block.Jump(); |
| 4554 | } |
| 4555 | } |
| 4556 | |
| 4557 | // Generate code to unlink and set the state for the (formerly) |
| 4558 | // shadowing targets that have been jumped to. |
| 4559 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4560 | if (shadows[i]->is_linked()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4561 | // If we have come from the shadowed return, the return value is |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4562 | // on the virtual frame. We must preserve it until it is |
| 4563 | // pushed. |
| 4564 | if (i == kReturnShadowIndex) { |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 4565 | Result return_value; |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4566 | shadows[i]->Bind(&return_value); |
| 4567 | return_value.ToRegister(eax); |
| 4568 | } else { |
| 4569 | shadows[i]->Bind(); |
| 4570 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4571 | // Because we can be jumping here (to spilled code) from |
| 4572 | // unspilled code, we need to reestablish a spilled frame at |
| 4573 | // this block. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4574 | frame_->SpillAll(); |
| 4575 | |
| 4576 | // Reload sp from the top handler, because some statements that |
| 4577 | // we break from (eg, for...in) may have left stuff on the |
| 4578 | // stack. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4579 | __ mov(esp, Operand::StaticVariable(handler_address)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4580 | frame_->Forget(frame_->height() - handler_height); |
| 4581 | |
| 4582 | // Unlink this handler and drop it from the frame. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4583 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4584 | frame_->EmitPop(Operand::StaticVariable(handler_address)); |
| 4585 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
| 4586 | |
| 4587 | if (i == kReturnShadowIndex) { |
| 4588 | // If this target shadowed the function return, materialize |
| 4589 | // the return value on the stack. |
| 4590 | frame_->EmitPush(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4591 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4592 | // Fake TOS for targets that shadowed breaks and continues. |
| 4593 | frame_->EmitPush(Immediate(Factory::undefined_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4594 | } |
| 4595 | __ Set(ecx, Immediate(Smi::FromInt(JUMPING + i))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4596 | if (--nof_unlinks > 0) { |
| 4597 | // If this is not the last unlink block, jump around the next. |
| 4598 | finally_block.Jump(); |
| 4599 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4600 | } |
| 4601 | } |
| 4602 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4603 | // --- Finally block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4604 | finally_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4605 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4606 | // Push the state on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4607 | frame_->EmitPush(ecx); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4608 | |
| 4609 | // We keep two elements on the stack - the (possibly faked) result |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4610 | // and the state - while evaluating the finally block. |
| 4611 | // |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4612 | // Generate code for the statements in the finally block. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4613 | VisitStatementsAndSpill(node->finally_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4614 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4615 | if (has_valid_frame()) { |
| 4616 | // Restore state and return value or faked TOS. |
| 4617 | frame_->EmitPop(ecx); |
| 4618 | frame_->EmitPop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4619 | } |
| 4620 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4621 | // Generate code to jump to the right destination for all used |
| 4622 | // formerly shadowing targets. Deallocate each shadow target. |
| 4623 | for (int i = 0; i < shadows.length(); i++) { |
| 4624 | if (has_valid_frame() && shadows[i]->is_bound()) { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4625 | BreakTarget* original = shadows[i]->other_target(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4626 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(JUMPING + i))); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4627 | if (i == kReturnShadowIndex) { |
| 4628 | // The return value is (already) in eax. |
| 4629 | Result return_value = allocator_->Allocate(eax); |
| 4630 | ASSERT(return_value.is_valid()); |
| 4631 | if (function_return_is_shadowed_) { |
| 4632 | original->Branch(equal, &return_value); |
| 4633 | } else { |
| 4634 | // Branch around the preparation for return which may emit |
| 4635 | // code. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4636 | JumpTarget skip; |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 4637 | skip.Branch(not_equal); |
| 4638 | frame_->PrepareForReturn(); |
| 4639 | original->Jump(&return_value); |
| 4640 | skip.Bind(); |
| 4641 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4642 | } else { |
| 4643 | original->Branch(equal); |
| 4644 | } |
| 4645 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4646 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4647 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4648 | if (has_valid_frame()) { |
| 4649 | // Check if we need to rethrow the exception. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4650 | JumpTarget exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4651 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(THROWING))); |
| 4652 | exit.Branch(not_equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4653 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4654 | // Rethrow exception. |
| 4655 | frame_->EmitPush(eax); // undo pop from above |
| 4656 | frame_->CallRuntime(Runtime::kReThrow, 1); |
| 4657 | |
| 4658 | // Done. |
| 4659 | exit.Bind(); |
| 4660 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4661 | } |
| 4662 | |
| 4663 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4664 | void CodeGenerator::VisitDebuggerStatement(DebuggerStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4665 | ASSERT(!in_spilled_code()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4666 | Comment cmnt(masm_, "[ DebuggerStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4667 | CodeForStatementPosition(node); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 4668 | #ifdef ENABLE_DEBUGGER_SUPPORT |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4669 | // Spill everything, even constants, to the frame. |
| 4670 | frame_->SpillAll(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4671 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4672 | frame_->DebugBreak(); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 4673 | // Ignore the return value. |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 4674 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4675 | } |
| 4676 | |
| 4677 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4678 | Result CodeGenerator::InstantiateFunction( |
| 4679 | Handle<SharedFunctionInfo> function_info) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4680 | // The inevitable call will sync frame elements to memory anyway, so |
| 4681 | // we do it eagerly to allow us to push the arguments directly into |
| 4682 | // place. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4683 | frame()->SyncRange(0, frame()->element_count() - 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4684 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4685 | // Use the fast case closure allocation code that allocates in new |
| 4686 | // space for nested functions that don't need literals cloning. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4687 | if (scope()->is_function_scope() && function_info->num_literals() == 0) { |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4688 | FastNewClosureStub stub; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4689 | frame()->EmitPush(Immediate(function_info)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4690 | return frame()->CallStub(&stub, 1); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4691 | } else { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4692 | // Call the runtime to instantiate the function based on the |
| 4693 | // shared function info. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4694 | frame()->EmitPush(esi); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4695 | frame()->EmitPush(Immediate(function_info)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4696 | return frame()->CallRuntime(Runtime::kNewClosure, 2); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 4697 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4698 | } |
| 4699 | |
| 4700 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4701 | void CodeGenerator::VisitFunctionLiteral(FunctionLiteral* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4702 | Comment cmnt(masm_, "[ FunctionLiteral"); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4703 | ASSERT(!in_safe_int32_mode()); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4704 | // Build the function info and instantiate it. |
| 4705 | Handle<SharedFunctionInfo> function_info = |
| 4706 | Compiler::BuildFunctionInfo(node, script(), this); |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 4707 | // Check for stack-overflow exception. |
| 4708 | if (HasStackOverflow()) return; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4709 | Result result = InstantiateFunction(function_info); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4710 | frame()->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4711 | } |
| 4712 | |
| 4713 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4714 | void CodeGenerator::VisitSharedFunctionInfoLiteral( |
| 4715 | SharedFunctionInfoLiteral* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4716 | ASSERT(!in_safe_int32_mode()); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4717 | Comment cmnt(masm_, "[ SharedFunctionInfoLiteral"); |
| 4718 | Result result = InstantiateFunction(node->shared_function_info()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4719 | frame()->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4720 | } |
| 4721 | |
| 4722 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4723 | void CodeGenerator::VisitConditional(Conditional* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4724 | Comment cmnt(masm_, "[ Conditional"); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4725 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4726 | JumpTarget then; |
| 4727 | JumpTarget else_; |
| 4728 | JumpTarget exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4729 | ControlDestination dest(&then, &else_, true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4730 | LoadCondition(node->condition(), &dest, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4731 | |
| 4732 | if (dest.false_was_fall_through()) { |
| 4733 | // The else target was bound, so we compile the else part first. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4734 | Load(node->else_expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4735 | |
| 4736 | if (then.is_linked()) { |
| 4737 | exit.Jump(); |
| 4738 | then.Bind(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4739 | Load(node->then_expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4740 | } |
| 4741 | } else { |
| 4742 | // The then target was bound, so we compile the then part first. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4743 | Load(node->then_expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4744 | |
| 4745 | if (else_.is_linked()) { |
| 4746 | exit.Jump(); |
| 4747 | else_.Bind(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4748 | Load(node->else_expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4749 | } |
| 4750 | } |
| 4751 | |
| 4752 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4753 | } |
| 4754 | |
| 4755 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4756 | void CodeGenerator::LoadFromSlot(Slot* slot, TypeofState typeof_state) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4757 | if (slot->type() == Slot::LOOKUP) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4758 | ASSERT(slot->var()->is_dynamic()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4759 | JumpTarget slow; |
| 4760 | JumpTarget done; |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4761 | Result value; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4762 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 4763 | // Generate fast case for loading from slots that correspond to |
| 4764 | // local/global variables or arguments unless they are shadowed by |
| 4765 | // eval-introduced bindings. |
| 4766 | EmitDynamicLoadFromSlotFastCase(slot, |
| 4767 | typeof_state, |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4768 | &value, |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 4769 | &slow, |
| 4770 | &done); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4771 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4772 | slow.Bind(); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4773 | // A runtime call is inevitable. We eagerly sync frame elements |
| 4774 | // to memory so that we can push the arguments directly into place |
| 4775 | // on top of the frame. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4776 | frame()->SyncRange(0, frame()->element_count() - 1); |
| 4777 | frame()->EmitPush(esi); |
| 4778 | frame()->EmitPush(Immediate(slot->var()->name())); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4779 | if (typeof_state == INSIDE_TYPEOF) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4780 | value = |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4781 | frame()->CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4782 | } else { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4783 | value = frame()->CallRuntime(Runtime::kLoadContextSlot, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4784 | } |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4785 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4786 | done.Bind(&value); |
| 4787 | frame_->Push(&value); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4788 | |
| 4789 | } else if (slot->var()->mode() == Variable::CONST) { |
| 4790 | // Const slots may contain 'the hole' value (the constant hasn't been |
| 4791 | // initialized yet) which needs to be converted into the 'undefined' |
| 4792 | // value. |
| 4793 | // |
| 4794 | // We currently spill the virtual frame because constants use the |
| 4795 | // potentially unsafe direct-frame access of SlotOperand. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4796 | VirtualFrame::SpilledScope spilled_scope; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4797 | Comment cmnt(masm_, "[ Load const"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4798 | Label exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4799 | __ mov(ecx, SlotOperand(slot, ecx)); |
| 4800 | __ cmp(ecx, Factory::the_hole_value()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4801 | __ j(not_equal, &exit); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4802 | __ mov(ecx, Factory::undefined_value()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4803 | __ bind(&exit); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4804 | frame()->EmitPush(ecx); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4805 | |
| 4806 | } else if (slot->type() == Slot::PARAMETER) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4807 | frame()->PushParameterAt(slot->index()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4808 | |
| 4809 | } else if (slot->type() == Slot::LOCAL) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4810 | frame()->PushLocalAt(slot->index()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4811 | |
| 4812 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4813 | // The other remaining slot types (LOOKUP and GLOBAL) cannot reach |
| 4814 | // here. |
| 4815 | // |
| 4816 | // The use of SlotOperand below is safe for an unspilled frame |
| 4817 | // because it will always be a context slot. |
| 4818 | ASSERT(slot->type() == Slot::CONTEXT); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4819 | Result temp = allocator()->Allocate(); |
| 4820 | ASSERT(temp.is_valid()); |
| 4821 | __ mov(temp.reg(), SlotOperand(slot, temp.reg())); |
| 4822 | frame()->Push(&temp); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4823 | } |
| 4824 | } |
| 4825 | |
| 4826 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4827 | void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4828 | TypeofState state) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4829 | LoadFromSlot(slot, state); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4830 | |
| 4831 | // Bail out quickly if we're not using lazy arguments allocation. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4832 | if (ArgumentsMode() != LAZY_ARGUMENTS_ALLOCATION) return; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4833 | |
| 4834 | // ... or if the slot isn't a non-parameter arguments slot. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4835 | if (slot->type() == Slot::PARAMETER || !slot->is_arguments()) return; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4836 | |
| 4837 | // If the loaded value is a constant, we know if the arguments |
| 4838 | // object has been lazily loaded yet. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4839 | Result result = frame()->Pop(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4840 | if (result.is_constant()) { |
| 4841 | if (result.handle()->IsTheHole()) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4842 | result = StoreArgumentsObject(false); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4843 | } |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4844 | frame()->Push(&result); |
| 4845 | return; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4846 | } |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4847 | ASSERT(result.is_register()); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4848 | // The loaded value is in a register. If it is the sentinel that |
| 4849 | // indicates that we haven't loaded the arguments object yet, we |
| 4850 | // need to do it now. |
| 4851 | JumpTarget exit; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4852 | __ cmp(Operand(result.reg()), Immediate(Factory::the_hole_value())); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4853 | frame()->Push(&result); |
| 4854 | exit.Branch(not_equal); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4855 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4856 | result = StoreArgumentsObject(false); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4857 | frame()->SetElementAt(0, &result); |
| 4858 | result.Unuse(); |
| 4859 | exit.Bind(); |
| 4860 | return; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 4861 | } |
| 4862 | |
| 4863 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4864 | Result CodeGenerator::LoadFromGlobalSlotCheckExtensions( |
| 4865 | Slot* slot, |
| 4866 | TypeofState typeof_state, |
| 4867 | JumpTarget* slow) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4868 | ASSERT(!in_safe_int32_mode()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4869 | // Check that no extension objects have been created by calls to |
| 4870 | // eval from the current scope to the global scope. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4871 | Register context = esi; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4872 | Result tmp = allocator_->Allocate(); |
| 4873 | ASSERT(tmp.is_valid()); // All non-reserved registers were available. |
| 4874 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4875 | Scope* s = scope(); |
| 4876 | while (s != NULL) { |
| 4877 | if (s->num_heap_slots() > 0) { |
| 4878 | if (s->calls_eval()) { |
| 4879 | // Check that extension is NULL. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4880 | __ cmp(ContextOperand(context, Context::EXTENSION_INDEX), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4881 | Immediate(0)); |
| 4882 | slow->Branch(not_equal, not_taken); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4883 | } |
| 4884 | // Load next context in chain. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4885 | __ mov(tmp.reg(), ContextOperand(context, Context::CLOSURE_INDEX)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4886 | __ mov(tmp.reg(), FieldOperand(tmp.reg(), JSFunction::kContextOffset)); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4887 | context = tmp.reg(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4888 | } |
| 4889 | // If no outer scope calls eval, we do not need to check more |
| 4890 | // context extensions. If we have reached an eval scope, we check |
| 4891 | // all extensions from this point. |
| 4892 | if (!s->outer_scope_calls_eval() || s->is_eval_scope()) break; |
| 4893 | s = s->outer_scope(); |
| 4894 | } |
| 4895 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 4896 | if (s != NULL && s->is_eval_scope()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4897 | // Loop up the context chain. There is no frame effect so it is |
| 4898 | // safe to use raw labels here. |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4899 | Label next, fast; |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 4900 | if (!context.is(tmp.reg())) { |
| 4901 | __ mov(tmp.reg(), context); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 4902 | } |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4903 | __ bind(&next); |
| 4904 | // Terminate at global context. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4905 | __ cmp(FieldOperand(tmp.reg(), HeapObject::kMapOffset), |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4906 | Immediate(Factory::global_context_map())); |
| 4907 | __ j(equal, &fast); |
| 4908 | // Check that extension is NULL. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4909 | __ cmp(ContextOperand(tmp.reg(), Context::EXTENSION_INDEX), Immediate(0)); |
| 4910 | slow->Branch(not_equal, not_taken); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4911 | // Load next context in chain. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4912 | __ mov(tmp.reg(), ContextOperand(tmp.reg(), Context::CLOSURE_INDEX)); |
| 4913 | __ mov(tmp.reg(), FieldOperand(tmp.reg(), JSFunction::kContextOffset)); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4914 | __ jmp(&next); |
| 4915 | __ bind(&fast); |
| 4916 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4917 | tmp.Unuse(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4918 | |
| 4919 | // All extension objects were empty and it is safe to use a global |
| 4920 | // load IC call. |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4921 | // The register allocator prefers eax if it is free, so the code generator |
| 4922 | // will load the global object directly into eax, which is where the LoadIC |
| 4923 | // expects it. |
| 4924 | frame_->Spill(eax); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 4925 | LoadGlobal(); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4926 | frame_->Push(slot->var()->name()); |
| 4927 | RelocInfo::Mode mode = (typeof_state == INSIDE_TYPEOF) |
| 4928 | ? RelocInfo::CODE_TARGET |
| 4929 | : RelocInfo::CODE_TARGET_CONTEXT; |
| 4930 | Result answer = frame_->CallLoadIC(mode); |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 4931 | // A test eax instruction following the call signals that the inobject |
| 4932 | // property case was inlined. Ensure that there is not a test eax |
| 4933 | // instruction here. |
| 4934 | __ nop(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4935 | return answer; |
| 4936 | } |
| 4937 | |
| 4938 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 4939 | void CodeGenerator::EmitDynamicLoadFromSlotFastCase(Slot* slot, |
| 4940 | TypeofState typeof_state, |
| 4941 | Result* result, |
| 4942 | JumpTarget* slow, |
| 4943 | JumpTarget* done) { |
| 4944 | // Generate fast-case code for variables that might be shadowed by |
| 4945 | // eval-introduced variables. Eval is used a lot without |
| 4946 | // introducing variables. In those cases, we do not want to |
| 4947 | // perform a runtime call for all variables in the scope |
| 4948 | // containing the eval. |
| 4949 | if (slot->var()->mode() == Variable::DYNAMIC_GLOBAL) { |
| 4950 | *result = LoadFromGlobalSlotCheckExtensions(slot, typeof_state, slow); |
| 4951 | done->Jump(result); |
| 4952 | |
| 4953 | } else if (slot->var()->mode() == Variable::DYNAMIC_LOCAL) { |
| 4954 | Slot* potential_slot = slot->var()->local_if_not_shadowed()->slot(); |
| 4955 | Expression* rewrite = slot->var()->local_if_not_shadowed()->rewrite(); |
| 4956 | if (potential_slot != NULL) { |
| 4957 | // Generate fast case for locals that rewrite to slots. |
| 4958 | // Allocate a fresh register to use as a temp in |
| 4959 | // ContextSlotOperandCheckExtensions and to hold the result |
| 4960 | // value. |
| 4961 | *result = allocator()->Allocate(); |
| 4962 | ASSERT(result->is_valid()); |
| 4963 | __ mov(result->reg(), |
| 4964 | ContextSlotOperandCheckExtensions(potential_slot, *result, slow)); |
| 4965 | if (potential_slot->var()->mode() == Variable::CONST) { |
| 4966 | __ cmp(result->reg(), Factory::the_hole_value()); |
| 4967 | done->Branch(not_equal, result); |
| 4968 | __ mov(result->reg(), Factory::undefined_value()); |
| 4969 | } |
| 4970 | done->Jump(result); |
| 4971 | } else if (rewrite != NULL) { |
| 4972 | // Generate fast case for calls of an argument function. |
| 4973 | Property* property = rewrite->AsProperty(); |
| 4974 | if (property != NULL) { |
| 4975 | VariableProxy* obj_proxy = property->obj()->AsVariableProxy(); |
| 4976 | Literal* key_literal = property->key()->AsLiteral(); |
| 4977 | if (obj_proxy != NULL && |
| 4978 | key_literal != NULL && |
| 4979 | obj_proxy->IsArguments() && |
| 4980 | key_literal->handle()->IsSmi()) { |
| 4981 | // Load arguments object if there are no eval-introduced |
| 4982 | // variables. Then load the argument from the arguments |
| 4983 | // object using keyed load. |
| 4984 | Result arguments = allocator()->Allocate(); |
| 4985 | ASSERT(arguments.is_valid()); |
| 4986 | __ mov(arguments.reg(), |
| 4987 | ContextSlotOperandCheckExtensions(obj_proxy->var()->slot(), |
| 4988 | arguments, |
| 4989 | slow)); |
| 4990 | frame_->Push(&arguments); |
| 4991 | frame_->Push(key_literal->handle()); |
| 4992 | *result = EmitKeyedLoad(); |
| 4993 | done->Jump(result); |
| 4994 | } |
| 4995 | } |
| 4996 | } |
| 4997 | } |
| 4998 | } |
| 4999 | |
| 5000 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5001 | void CodeGenerator::StoreToSlot(Slot* slot, InitState init_state) { |
| 5002 | if (slot->type() == Slot::LOOKUP) { |
| 5003 | ASSERT(slot->var()->is_dynamic()); |
| 5004 | |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 5005 | // For now, just do a runtime call. Since the call is inevitable, |
| 5006 | // we eagerly sync the virtual frame so we can directly push the |
| 5007 | // arguments into place. |
| 5008 | frame_->SyncRange(0, frame_->element_count() - 1); |
| 5009 | |
| 5010 | frame_->EmitPush(esi); |
| 5011 | frame_->EmitPush(Immediate(slot->var()->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5012 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 5013 | Result value; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5014 | if (init_state == CONST_INIT) { |
| 5015 | // Same as the case for a normal store, but ignores attribute |
| 5016 | // (e.g. READ_ONLY) of context slot so that we can initialize const |
| 5017 | // properties (introduced via eval("const foo = (some expr);")). Also, |
| 5018 | // uses the current function context instead of the top context. |
| 5019 | // |
| 5020 | // Note that we must declare the foo upon entry of eval(), via a |
| 5021 | // context slot declaration, but we cannot initialize it at the same |
| 5022 | // time, because the const declaration may be at the end of the eval |
| 5023 | // code (sigh...) and the const variable may have been used before |
| 5024 | // (where its value is 'undefined'). Thus, we can only do the |
| 5025 | // initialization when we actually encounter the expression and when |
| 5026 | // the expression operands are defined and valid, and thus we need the |
| 5027 | // split into 2 operations: declaration of the context slot followed |
| 5028 | // by initialization. |
| 5029 | value = frame_->CallRuntime(Runtime::kInitializeConstContextSlot, 3); |
| 5030 | } else { |
| 5031 | value = frame_->CallRuntime(Runtime::kStoreContextSlot, 3); |
| 5032 | } |
| 5033 | // Storing a variable must keep the (new) value on the expression |
| 5034 | // stack. This is necessary for compiling chained assignment |
| 5035 | // expressions. |
| 5036 | frame_->Push(&value); |
| 5037 | |
| 5038 | } else { |
| 5039 | ASSERT(!slot->var()->is_dynamic()); |
| 5040 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5041 | JumpTarget exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5042 | if (init_state == CONST_INIT) { |
| 5043 | ASSERT(slot->var()->mode() == Variable::CONST); |
| 5044 | // Only the first const initialization must be executed (the slot |
| 5045 | // still contains 'the hole' value). When the assignment is executed, |
| 5046 | // the code is identical to a normal store (see below). |
| 5047 | // |
| 5048 | // We spill the frame in the code below because the direct-frame |
| 5049 | // access of SlotOperand is potentially unsafe with an unspilled |
| 5050 | // frame. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5051 | VirtualFrame::SpilledScope spilled_scope; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5052 | Comment cmnt(masm_, "[ Init const"); |
| 5053 | __ mov(ecx, SlotOperand(slot, ecx)); |
| 5054 | __ cmp(ecx, Factory::the_hole_value()); |
| 5055 | exit.Branch(not_equal); |
| 5056 | } |
| 5057 | |
| 5058 | // We must execute the store. Storing a variable must keep the (new) |
| 5059 | // value on the stack. This is necessary for compiling assignment |
| 5060 | // expressions. |
| 5061 | // |
| 5062 | // Note: We will reach here even with slot->var()->mode() == |
| 5063 | // Variable::CONST because of const declarations which will initialize |
| 5064 | // consts to 'the hole' value and by doing so, end up calling this code. |
| 5065 | if (slot->type() == Slot::PARAMETER) { |
| 5066 | frame_->StoreToParameterAt(slot->index()); |
| 5067 | } else if (slot->type() == Slot::LOCAL) { |
| 5068 | frame_->StoreToLocalAt(slot->index()); |
| 5069 | } else { |
| 5070 | // The other slot types (LOOKUP and GLOBAL) cannot reach here. |
| 5071 | // |
| 5072 | // The use of SlotOperand below is safe for an unspilled frame |
| 5073 | // because the slot is a context slot. |
| 5074 | ASSERT(slot->type() == Slot::CONTEXT); |
| 5075 | frame_->Dup(); |
| 5076 | Result value = frame_->Pop(); |
| 5077 | value.ToRegister(); |
| 5078 | Result start = allocator_->Allocate(); |
| 5079 | ASSERT(start.is_valid()); |
| 5080 | __ mov(SlotOperand(slot, start.reg()), value.reg()); |
| 5081 | // RecordWrite may destroy the value registers. |
| 5082 | // |
| 5083 | // TODO(204): Avoid actually spilling when the value is not |
| 5084 | // needed (probably the common case). |
| 5085 | frame_->Spill(value.reg()); |
| 5086 | int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 5087 | Result temp = allocator_->Allocate(); |
| 5088 | ASSERT(temp.is_valid()); |
| 5089 | __ RecordWrite(start.reg(), offset, value.reg(), temp.reg()); |
| 5090 | // The results start, value, and temp are unused by going out of |
| 5091 | // scope. |
| 5092 | } |
| 5093 | |
| 5094 | exit.Bind(); |
| 5095 | } |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 5096 | } |
| 5097 | |
| 5098 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5099 | void CodeGenerator::VisitSlot(Slot* slot) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5100 | Comment cmnt(masm_, "[ Slot"); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5101 | if (in_safe_int32_mode()) { |
| 5102 | if ((slot->type() == Slot::LOCAL && !slot->is_arguments())) { |
| 5103 | frame()->UntaggedPushLocalAt(slot->index()); |
| 5104 | } else if (slot->type() == Slot::PARAMETER) { |
| 5105 | frame()->UntaggedPushParameterAt(slot->index()); |
| 5106 | } else { |
| 5107 | UNREACHABLE(); |
| 5108 | } |
| 5109 | } else { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5110 | LoadFromSlotCheckForArguments(slot, NOT_INSIDE_TYPEOF); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5111 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5112 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5113 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5114 | |
| 5115 | void CodeGenerator::VisitVariableProxy(VariableProxy* node) { |
| 5116 | Comment cmnt(masm_, "[ VariableProxy"); |
| 5117 | Variable* var = node->var(); |
| 5118 | Expression* expr = var->rewrite(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 5119 | if (expr != NULL) { |
| 5120 | Visit(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5121 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5122 | ASSERT(var->is_global()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5123 | ASSERT(!in_safe_int32_mode()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5124 | Reference ref(this, node); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5125 | ref.GetValue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5126 | } |
| 5127 | } |
| 5128 | |
| 5129 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5130 | void CodeGenerator::VisitLiteral(Literal* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5131 | Comment cmnt(masm_, "[ Literal"); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5132 | if (in_safe_int32_mode()) { |
| 5133 | frame_->PushUntaggedElement(node->handle()); |
| 5134 | } else { |
| 5135 | frame_->Push(node->handle()); |
| 5136 | } |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 5137 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5138 | |
| 5139 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5140 | void CodeGenerator::PushUnsafeSmi(Handle<Object> value) { |
| 5141 | ASSERT(value->IsSmi()); |
| 5142 | int bits = reinterpret_cast<int>(*value); |
| 5143 | __ push(Immediate(bits & 0x0000FFFF)); |
| 5144 | __ or_(Operand(esp, 0), Immediate(bits & 0xFFFF0000)); |
| 5145 | } |
| 5146 | |
| 5147 | |
| 5148 | void CodeGenerator::StoreUnsafeSmiToLocal(int offset, Handle<Object> value) { |
| 5149 | ASSERT(value->IsSmi()); |
| 5150 | int bits = reinterpret_cast<int>(*value); |
| 5151 | __ mov(Operand(ebp, offset), Immediate(bits & 0x0000FFFF)); |
| 5152 | __ or_(Operand(ebp, offset), Immediate(bits & 0xFFFF0000)); |
| 5153 | } |
| 5154 | |
| 5155 | |
| 5156 | void CodeGenerator::MoveUnsafeSmi(Register target, Handle<Object> value) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5157 | ASSERT(target.is_valid()); |
| 5158 | ASSERT(value->IsSmi()); |
| 5159 | int bits = reinterpret_cast<int>(*value); |
| 5160 | __ Set(target, Immediate(bits & 0x0000FFFF)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5161 | __ or_(target, bits & 0xFFFF0000); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5162 | } |
| 5163 | |
| 5164 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5165 | bool CodeGenerator::IsUnsafeSmi(Handle<Object> value) { |
| 5166 | if (!value->IsSmi()) return false; |
| 5167 | int int_value = Smi::cast(*value)->value(); |
| 5168 | return !is_intn(int_value, kMaxSmiInlinedBits); |
| 5169 | } |
| 5170 | |
| 5171 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5172 | // Materialize the regexp literal 'node' in the literals array |
| 5173 | // 'literals' of the function. Leave the regexp boilerplate in |
| 5174 | // 'boilerplate'. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5175 | class DeferredRegExpLiteral: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5176 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5177 | DeferredRegExpLiteral(Register boilerplate, |
| 5178 | Register literals, |
| 5179 | RegExpLiteral* node) |
| 5180 | : boilerplate_(boilerplate), literals_(literals), node_(node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5181 | set_comment("[ DeferredRegExpLiteral"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5182 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5183 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5184 | void Generate(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5185 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5186 | private: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5187 | Register boilerplate_; |
| 5188 | Register literals_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5189 | RegExpLiteral* node_; |
| 5190 | }; |
| 5191 | |
| 5192 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5193 | void DeferredRegExpLiteral::Generate() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5194 | // Since the entry is undefined we call the runtime system to |
| 5195 | // compute the literal. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5196 | // Literal array (0). |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5197 | __ push(literals_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5198 | // Literal index (1). |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5199 | __ push(Immediate(Smi::FromInt(node_->literal_index()))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5200 | // RegExp pattern (2). |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5201 | __ push(Immediate(node_->pattern())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5202 | // RegExp flags (3). |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5203 | __ push(Immediate(node_->flags())); |
| 5204 | __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
| 5205 | if (!boilerplate_.is(eax)) __ mov(boilerplate_, eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5206 | } |
| 5207 | |
| 5208 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5209 | void CodeGenerator::VisitRegExpLiteral(RegExpLiteral* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5210 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5211 | Comment cmnt(masm_, "[ RegExp Literal"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5212 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5213 | // Retrieve the literals array and check the allocated entry. Begin |
| 5214 | // with a writable copy of the function of this activation in a |
| 5215 | // register. |
| 5216 | frame_->PushFunction(); |
| 5217 | Result literals = frame_->Pop(); |
| 5218 | literals.ToRegister(); |
| 5219 | frame_->Spill(literals.reg()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5220 | |
| 5221 | // Load the literals array of the function. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5222 | __ mov(literals.reg(), |
| 5223 | FieldOperand(literals.reg(), JSFunction::kLiteralsOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5224 | |
| 5225 | // Load the literal at the ast saved index. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5226 | Result boilerplate = allocator_->Allocate(); |
| 5227 | ASSERT(boilerplate.is_valid()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5228 | int literal_offset = |
| 5229 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5230 | __ mov(boilerplate.reg(), FieldOperand(literals.reg(), literal_offset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5231 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5232 | // Check whether we need to materialize the RegExp object. If so, |
| 5233 | // jump to the deferred code passing the literals array. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5234 | DeferredRegExpLiteral* deferred = |
| 5235 | new DeferredRegExpLiteral(boilerplate.reg(), literals.reg(), node); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5236 | __ cmp(boilerplate.reg(), Factory::undefined_value()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 5237 | deferred->Branch(equal); |
| 5238 | deferred->BindExit(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5239 | literals.Unuse(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5240 | |
| 5241 | // Push the boilerplate object. |
| 5242 | frame_->Push(&boilerplate); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5243 | } |
| 5244 | |
| 5245 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5246 | void CodeGenerator::VisitObjectLiteral(ObjectLiteral* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5247 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5248 | Comment cmnt(masm_, "[ ObjectLiteral"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5249 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5250 | // Load a writable copy of the function of this activation in a |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5251 | // register. |
| 5252 | frame_->PushFunction(); |
| 5253 | Result literals = frame_->Pop(); |
| 5254 | literals.ToRegister(); |
| 5255 | frame_->Spill(literals.reg()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5256 | |
| 5257 | // Load the literals array of the function. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5258 | __ mov(literals.reg(), |
| 5259 | FieldOperand(literals.reg(), JSFunction::kLiteralsOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5260 | // Literal array. |
| 5261 | frame_->Push(&literals); |
| 5262 | // Literal index. |
| 5263 | frame_->Push(Smi::FromInt(node->literal_index())); |
| 5264 | // Constant properties. |
| 5265 | frame_->Push(node->constant_properties()); |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 5266 | // Should the object literal have fast elements? |
| 5267 | frame_->Push(Smi::FromInt(node->fast_elements() ? 1 : 0)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5268 | Result clone; |
| 5269 | if (node->depth() > 1) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 5270 | clone = frame_->CallRuntime(Runtime::kCreateObjectLiteral, 4); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5271 | } else { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 5272 | clone = frame_->CallRuntime(Runtime::kCreateObjectLiteralShallow, 4); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5273 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5274 | frame_->Push(&clone); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5275 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5276 | for (int i = 0; i < node->properties()->length(); i++) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 5277 | ObjectLiteral::Property* property = node->properties()->at(i); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5278 | switch (property->kind()) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5279 | case ObjectLiteral::Property::CONSTANT: |
| 5280 | break; |
| 5281 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 5282 | if (CompileTimeValue::IsCompileTimeValue(property->value())) break; |
| 5283 | // else fall through. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5284 | case ObjectLiteral::Property::COMPUTED: { |
| 5285 | Handle<Object> key(property->key()->handle()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5286 | if (key->IsSymbol()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5287 | // Duplicate the object as the IC receiver. |
| 5288 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5289 | Load(property->value()); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5290 | Result dummy = frame_->CallStoreIC(Handle<String>::cast(key), false); |
| 5291 | dummy.Unuse(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5292 | break; |
| 5293 | } |
| 5294 | // Fall through |
| 5295 | } |
| 5296 | case ObjectLiteral::Property::PROTOTYPE: { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5297 | // Duplicate the object as an argument to the runtime call. |
| 5298 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5299 | Load(property->key()); |
| 5300 | Load(property->value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5301 | Result ignored = frame_->CallRuntime(Runtime::kSetProperty, 3); |
| 5302 | // Ignore the result. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5303 | break; |
| 5304 | } |
| 5305 | case ObjectLiteral::Property::SETTER: { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5306 | // Duplicate the object as an argument to the runtime call. |
| 5307 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5308 | Load(property->key()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5309 | frame_->Push(Smi::FromInt(1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5310 | Load(property->value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5311 | Result ignored = frame_->CallRuntime(Runtime::kDefineAccessor, 4); |
| 5312 | // Ignore the result. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5313 | break; |
| 5314 | } |
| 5315 | case ObjectLiteral::Property::GETTER: { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5316 | // Duplicate the object as an argument to the runtime call. |
| 5317 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5318 | Load(property->key()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5319 | frame_->Push(Smi::FromInt(0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5320 | Load(property->value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5321 | Result ignored = frame_->CallRuntime(Runtime::kDefineAccessor, 4); |
| 5322 | // Ignore the result. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5323 | break; |
| 5324 | } |
| 5325 | default: UNREACHABLE(); |
| 5326 | } |
| 5327 | } |
| 5328 | } |
| 5329 | |
| 5330 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5331 | void CodeGenerator::VisitArrayLiteral(ArrayLiteral* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5332 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5333 | Comment cmnt(masm_, "[ ArrayLiteral"); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5334 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5335 | // Load a writable copy of the function of this activation in a |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5336 | // register. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5337 | frame_->PushFunction(); |
| 5338 | Result literals = frame_->Pop(); |
| 5339 | literals.ToRegister(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5340 | frame_->Spill(literals.reg()); |
| 5341 | |
| 5342 | // Load the literals array of the function. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5343 | __ mov(literals.reg(), |
| 5344 | FieldOperand(literals.reg(), JSFunction::kLiteralsOffset)); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5345 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5346 | frame_->Push(&literals); |
| 5347 | frame_->Push(Smi::FromInt(node->literal_index())); |
| 5348 | frame_->Push(node->constant_elements()); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5349 | int length = node->values()->length(); |
| 5350 | Result clone; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5351 | if (node->depth() > 1) { |
| 5352 | clone = frame_->CallRuntime(Runtime::kCreateArrayLiteral, 3); |
| 5353 | } else if (length > FastCloneShallowArrayStub::kMaximumLength) { |
| 5354 | clone = frame_->CallRuntime(Runtime::kCreateArrayLiteralShallow, 3); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5355 | } else { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5356 | FastCloneShallowArrayStub stub(length); |
| 5357 | clone = frame_->CallStub(&stub, 3); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5358 | } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5359 | frame_->Push(&clone); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5360 | |
| 5361 | // Generate code to set the elements in the array that are not |
| 5362 | // literals. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5363 | for (int i = 0; i < length; i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5364 | Expression* value = node->values()->at(i); |
| 5365 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5366 | // If value is a literal the property value is already set in the |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5367 | // boilerplate object. |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5368 | if (value->AsLiteral() != NULL) continue; |
| 5369 | // If value is a materialized literal the property value is already set |
| 5370 | // in the boilerplate object if it is simple. |
| 5371 | if (CompileTimeValue::IsCompileTimeValue(value)) continue; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5372 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5373 | // The property must be set by generated code. |
| 5374 | Load(value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5375 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5376 | // Get the property value off the stack. |
| 5377 | Result prop_value = frame_->Pop(); |
| 5378 | prop_value.ToRegister(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5379 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5380 | // Fetch the array literal while leaving a copy on the stack and |
| 5381 | // use it to get the elements array. |
| 5382 | frame_->Dup(); |
| 5383 | Result elements = frame_->Pop(); |
| 5384 | elements.ToRegister(); |
| 5385 | frame_->Spill(elements.reg()); |
| 5386 | // Get the elements array. |
| 5387 | __ mov(elements.reg(), |
| 5388 | FieldOperand(elements.reg(), JSObject::kElementsOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5389 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5390 | // Write to the indexed properties array. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5391 | int offset = i * kPointerSize + FixedArray::kHeaderSize; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 5392 | __ mov(FieldOperand(elements.reg(), offset), prop_value.reg()); |
| 5393 | |
| 5394 | // Update the write barrier for the array address. |
| 5395 | frame_->Spill(prop_value.reg()); // Overwritten by the write barrier. |
| 5396 | Result scratch = allocator_->Allocate(); |
| 5397 | ASSERT(scratch.is_valid()); |
| 5398 | __ RecordWrite(elements.reg(), offset, prop_value.reg(), scratch.reg()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5399 | } |
| 5400 | } |
| 5401 | |
| 5402 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 5403 | void CodeGenerator::VisitCatchExtensionObject(CatchExtensionObject* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5404 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5405 | ASSERT(!in_spilled_code()); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 5406 | // Call runtime routine to allocate the catch extension object and |
| 5407 | // assign the exception value to the catch variable. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5408 | Comment cmnt(masm_, "[ CatchExtensionObject"); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 5409 | Load(node->key()); |
| 5410 | Load(node->value()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5411 | Result result = |
| 5412 | frame_->CallRuntime(Runtime::kCreateCatchExtensionObject, 2); |
| 5413 | frame_->Push(&result); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 5414 | } |
| 5415 | |
| 5416 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5417 | void CodeGenerator::EmitSlotAssignment(Assignment* node) { |
| 5418 | #ifdef DEBUG |
| 5419 | int original_height = frame()->height(); |
| 5420 | #endif |
| 5421 | Comment cmnt(masm(), "[ Variable Assignment"); |
| 5422 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 5423 | ASSERT(var != NULL); |
| 5424 | Slot* slot = var->slot(); |
| 5425 | ASSERT(slot != NULL); |
| 5426 | |
| 5427 | // Evaluate the right-hand side. |
| 5428 | if (node->is_compound()) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5429 | // For a compound assignment the right-hand side is a binary operation |
| 5430 | // between the current property value and the actual right-hand side. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5431 | LoadFromSlotCheckForArguments(slot, NOT_INSIDE_TYPEOF); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5432 | Load(node->value()); |
| 5433 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5434 | // Perform the binary operation. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5435 | bool overwrite_value = |
| 5436 | (node->value()->AsBinaryOperation() != NULL && |
| 5437 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 5438 | // Construct the implicit binary operation. |
| 5439 | BinaryOperation expr(node, node->binary_op(), node->target(), |
| 5440 | node->value()); |
| 5441 | GenericBinaryOperation(&expr, |
| 5442 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5443 | } else { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5444 | // For non-compound assignment just load the right-hand side. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5445 | Load(node->value()); |
| 5446 | } |
| 5447 | |
| 5448 | // Perform the assignment. |
| 5449 | if (var->mode() != Variable::CONST || node->op() == Token::INIT_CONST) { |
| 5450 | CodeForSourcePosition(node->position()); |
| 5451 | StoreToSlot(slot, |
| 5452 | node->op() == Token::INIT_CONST ? CONST_INIT : NOT_CONST_INIT); |
| 5453 | } |
| 5454 | ASSERT(frame()->height() == original_height + 1); |
| 5455 | } |
| 5456 | |
| 5457 | |
| 5458 | void CodeGenerator::EmitNamedPropertyAssignment(Assignment* node) { |
| 5459 | #ifdef DEBUG |
| 5460 | int original_height = frame()->height(); |
| 5461 | #endif |
| 5462 | Comment cmnt(masm(), "[ Named Property Assignment"); |
| 5463 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 5464 | Property* prop = node->target()->AsProperty(); |
| 5465 | ASSERT(var == NULL || (prop == NULL && var->is_global())); |
| 5466 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5467 | // Initialize name and evaluate the receiver sub-expression if necessary. If |
| 5468 | // the receiver is trivial it is not placed on the stack at this point, but |
| 5469 | // loaded whenever actually needed. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5470 | Handle<String> name; |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5471 | bool is_trivial_receiver = false; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5472 | if (var != NULL) { |
| 5473 | name = var->name(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5474 | } else { |
| 5475 | Literal* lit = prop->key()->AsLiteral(); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5476 | ASSERT_NOT_NULL(lit); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5477 | name = Handle<String>::cast(lit->handle()); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5478 | // Do not materialize the receiver on the frame if it is trivial. |
| 5479 | is_trivial_receiver = prop->obj()->IsTrivial(); |
| 5480 | if (!is_trivial_receiver) Load(prop->obj()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5481 | } |
| 5482 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5483 | // Change to slow case in the beginning of an initialization block to |
| 5484 | // avoid the quadratic behavior of repeatedly adding fast properties. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5485 | if (node->starts_initialization_block()) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5486 | // Initialization block consists of assignments of the form expr.x = ..., so |
| 5487 | // this will never be an assignment to a variable, so there must be a |
| 5488 | // receiver object. |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5489 | ASSERT_EQ(NULL, var); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5490 | if (is_trivial_receiver) { |
| 5491 | frame()->Push(prop->obj()); |
| 5492 | } else { |
| 5493 | frame()->Dup(); |
| 5494 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5495 | Result ignored = frame()->CallRuntime(Runtime::kToSlowProperties, 1); |
| 5496 | } |
| 5497 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5498 | // Change to fast case at the end of an initialization block. To prepare for |
| 5499 | // that add an extra copy of the receiver to the frame, so that it can be |
| 5500 | // converted back to fast case after the assignment. |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5501 | if (node->ends_initialization_block() && !is_trivial_receiver) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5502 | frame()->Dup(); |
| 5503 | } |
| 5504 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5505 | // Stack layout: |
| 5506 | // [tos] : receiver (only materialized if non-trivial) |
| 5507 | // [tos+1] : receiver if at the end of an initialization block |
| 5508 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5509 | // Evaluate the right-hand side. |
| 5510 | if (node->is_compound()) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5511 | // For a compound assignment the right-hand side is a binary operation |
| 5512 | // between the current property value and the actual right-hand side. |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5513 | if (is_trivial_receiver) { |
| 5514 | frame()->Push(prop->obj()); |
| 5515 | } else if (var != NULL) { |
| 5516 | // The LoadIC stub expects the object in eax. |
| 5517 | // Freeing eax causes the code generator to load the global into it. |
| 5518 | frame_->Spill(eax); |
| 5519 | LoadGlobal(); |
| 5520 | } else { |
| 5521 | frame()->Dup(); |
| 5522 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5523 | Result value = EmitNamedLoad(name, var != NULL); |
| 5524 | frame()->Push(&value); |
| 5525 | Load(node->value()); |
| 5526 | |
| 5527 | bool overwrite_value = |
| 5528 | (node->value()->AsBinaryOperation() != NULL && |
| 5529 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 5530 | // Construct the implicit binary operation. |
| 5531 | BinaryOperation expr(node, node->binary_op(), node->target(), |
| 5532 | node->value()); |
| 5533 | GenericBinaryOperation(&expr, |
| 5534 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5535 | } else { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5536 | // For non-compound assignment just load the right-hand side. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5537 | Load(node->value()); |
| 5538 | } |
| 5539 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5540 | // Stack layout: |
| 5541 | // [tos] : value |
| 5542 | // [tos+1] : receiver (only materialized if non-trivial) |
| 5543 | // [tos+2] : receiver if at the end of an initialization block |
| 5544 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5545 | // Perform the assignment. It is safe to ignore constants here. |
| 5546 | ASSERT(var == NULL || var->mode() != Variable::CONST); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5547 | ASSERT_NE(Token::INIT_CONST, node->op()); |
| 5548 | if (is_trivial_receiver) { |
| 5549 | Result value = frame()->Pop(); |
| 5550 | frame()->Push(prop->obj()); |
| 5551 | frame()->Push(&value); |
| 5552 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5553 | CodeForSourcePosition(node->position()); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5554 | bool is_contextual = (var != NULL); |
| 5555 | Result answer = EmitNamedStore(name, is_contextual); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5556 | frame()->Push(&answer); |
| 5557 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5558 | // Stack layout: |
| 5559 | // [tos] : result |
| 5560 | // [tos+1] : receiver if at the end of an initialization block |
| 5561 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5562 | if (node->ends_initialization_block()) { |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5563 | ASSERT_EQ(NULL, var); |
| 5564 | // The argument to the runtime call is the receiver. |
| 5565 | if (is_trivial_receiver) { |
| 5566 | frame()->Push(prop->obj()); |
| 5567 | } else { |
| 5568 | // A copy of the receiver is below the value of the assignment. Swap |
| 5569 | // the receiver and the value of the assignment expression. |
| 5570 | Result result = frame()->Pop(); |
| 5571 | Result receiver = frame()->Pop(); |
| 5572 | frame()->Push(&result); |
| 5573 | frame()->Push(&receiver); |
| 5574 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5575 | Result ignored = frame_->CallRuntime(Runtime::kToFastProperties, 1); |
| 5576 | } |
| 5577 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5578 | // Stack layout: |
| 5579 | // [tos] : result |
| 5580 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5581 | ASSERT_EQ(frame()->height(), original_height + 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5582 | } |
| 5583 | |
| 5584 | |
| 5585 | void CodeGenerator::EmitKeyedPropertyAssignment(Assignment* node) { |
| 5586 | #ifdef DEBUG |
| 5587 | int original_height = frame()->height(); |
| 5588 | #endif |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5589 | Comment cmnt(masm_, "[ Keyed Property Assignment"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5590 | Property* prop = node->target()->AsProperty(); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 5591 | ASSERT_NOT_NULL(prop); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5592 | |
| 5593 | // Evaluate the receiver subexpression. |
| 5594 | Load(prop->obj()); |
| 5595 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5596 | // Change to slow case in the beginning of an initialization block to |
| 5597 | // avoid the quadratic behavior of repeatedly adding fast properties. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5598 | if (node->starts_initialization_block()) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5599 | frame_->Dup(); |
| 5600 | Result ignored = frame_->CallRuntime(Runtime::kToSlowProperties, 1); |
| 5601 | } |
| 5602 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5603 | // Change to fast case at the end of an initialization block. To prepare for |
| 5604 | // that add an extra copy of the receiver to the frame, so that it can be |
| 5605 | // converted back to fast case after the assignment. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5606 | if (node->ends_initialization_block()) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5607 | frame_->Dup(); |
| 5608 | } |
| 5609 | |
| 5610 | // Evaluate the key subexpression. |
| 5611 | Load(prop->key()); |
| 5612 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5613 | // Stack layout: |
| 5614 | // [tos] : key |
| 5615 | // [tos+1] : receiver |
| 5616 | // [tos+2] : receiver if at the end of an initialization block |
| 5617 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5618 | // Evaluate the right-hand side. |
| 5619 | if (node->is_compound()) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5620 | // For a compound assignment the right-hand side is a binary operation |
| 5621 | // between the current property value and the actual right-hand side. |
| 5622 | // Duplicate receiver and key for loading the current property value. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5623 | frame()->PushElementAt(1); |
| 5624 | frame()->PushElementAt(1); |
| 5625 | Result value = EmitKeyedLoad(); |
| 5626 | frame()->Push(&value); |
| 5627 | Load(node->value()); |
| 5628 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5629 | // Perform the binary operation. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5630 | bool overwrite_value = |
| 5631 | (node->value()->AsBinaryOperation() != NULL && |
| 5632 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 5633 | BinaryOperation expr(node, node->binary_op(), node->target(), |
| 5634 | node->value()); |
| 5635 | GenericBinaryOperation(&expr, |
| 5636 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5637 | } else { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5638 | // For non-compound assignment just load the right-hand side. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5639 | Load(node->value()); |
| 5640 | } |
| 5641 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5642 | // Stack layout: |
| 5643 | // [tos] : value |
| 5644 | // [tos+1] : key |
| 5645 | // [tos+2] : receiver |
| 5646 | // [tos+3] : receiver if at the end of an initialization block |
| 5647 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5648 | // Perform the assignment. It is safe to ignore constants here. |
| 5649 | ASSERT(node->op() != Token::INIT_CONST); |
| 5650 | CodeForSourcePosition(node->position()); |
| 5651 | Result answer = EmitKeyedStore(prop->key()->type()); |
| 5652 | frame()->Push(&answer); |
| 5653 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5654 | // Stack layout: |
| 5655 | // [tos] : result |
| 5656 | // [tos+1] : receiver if at the end of an initialization block |
| 5657 | |
| 5658 | // Change to fast case at the end of an initialization block. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5659 | if (node->ends_initialization_block()) { |
| 5660 | // The argument to the runtime call is the extra copy of the receiver, |
| 5661 | // which is below the value of the assignment. Swap the receiver and |
| 5662 | // the value of the assignment expression. |
| 5663 | Result result = frame()->Pop(); |
| 5664 | Result receiver = frame()->Pop(); |
| 5665 | frame()->Push(&result); |
| 5666 | frame()->Push(&receiver); |
| 5667 | Result ignored = frame_->CallRuntime(Runtime::kToFastProperties, 1); |
| 5668 | } |
| 5669 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5670 | // Stack layout: |
| 5671 | // [tos] : result |
| 5672 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5673 | ASSERT(frame()->height() == original_height + 1); |
| 5674 | } |
| 5675 | |
| 5676 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5677 | void CodeGenerator::VisitAssignment(Assignment* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5678 | ASSERT(!in_safe_int32_mode()); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5679 | #ifdef DEBUG |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5680 | int original_height = frame()->height(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5681 | #endif |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5682 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 5683 | Property* prop = node->target()->AsProperty(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5684 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5685 | if (var != NULL && !var->is_global()) { |
| 5686 | EmitSlotAssignment(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5687 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5688 | } else if ((prop != NULL && prop->key()->IsPropertyName()) || |
| 5689 | (var != NULL && var->is_global())) { |
| 5690 | // Properties whose keys are property names and global variables are |
| 5691 | // treated as named property references. We do not need to consider |
| 5692 | // global 'this' because it is not a valid left-hand side. |
| 5693 | EmitNamedPropertyAssignment(node); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5694 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5695 | } else if (prop != NULL) { |
| 5696 | // Other properties (including rewritten parameters for a function that |
| 5697 | // uses arguments) are keyed property assignments. |
| 5698 | EmitKeyedPropertyAssignment(node); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5699 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5700 | } else { |
| 5701 | // Invalid left-hand side. |
| 5702 | Load(node->target()); |
| 5703 | Result result = frame()->CallRuntime(Runtime::kThrowReferenceError, 1); |
| 5704 | // The runtime call doesn't actually return but the code generator will |
| 5705 | // still generate code and expects a certain frame height. |
| 5706 | frame()->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5707 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5708 | |
| 5709 | ASSERT(frame()->height() == original_height + 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5710 | } |
| 5711 | |
| 5712 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5713 | void CodeGenerator::VisitThrow(Throw* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5714 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5715 | Comment cmnt(masm_, "[ Throw"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5716 | Load(node->exception()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5717 | Result result = frame_->CallRuntime(Runtime::kThrow, 1); |
| 5718 | frame_->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5719 | } |
| 5720 | |
| 5721 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5722 | void CodeGenerator::VisitProperty(Property* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5723 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5724 | Comment cmnt(masm_, "[ Property"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5725 | Reference property(this, node); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5726 | property.GetValue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5727 | } |
| 5728 | |
| 5729 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5730 | void CodeGenerator::VisitCall(Call* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5731 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5732 | Comment cmnt(masm_, "[ Call"); |
| 5733 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5734 | Expression* function = node->expression(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5735 | ZoneList<Expression*>* args = node->arguments(); |
| 5736 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5737 | // Check if the function is a variable or a property. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5738 | Variable* var = function->AsVariableProxy()->AsVariable(); |
| 5739 | Property* property = function->AsProperty(); |
| 5740 | |
| 5741 | // ------------------------------------------------------------------------ |
| 5742 | // Fast-case: Use inline caching. |
| 5743 | // --- |
| 5744 | // According to ECMA-262, section 11.2.3, page 44, the function to call |
| 5745 | // must be resolved after the arguments have been evaluated. The IC code |
| 5746 | // automatically handles this by loading the arguments before the function |
| 5747 | // is resolved in cache misses (this also holds for megamorphic calls). |
| 5748 | // ------------------------------------------------------------------------ |
| 5749 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5750 | if (var != NULL && var->is_possibly_eval()) { |
| 5751 | // ---------------------------------- |
| 5752 | // JavaScript example: 'eval(arg)' // eval is not known to be shadowed |
| 5753 | // ---------------------------------- |
| 5754 | |
| 5755 | // In a call to eval, we first call %ResolvePossiblyDirectEval to |
| 5756 | // resolve the function we need to call and the receiver of the |
| 5757 | // call. Then we call the resolved function using the given |
| 5758 | // arguments. |
| 5759 | |
| 5760 | // Prepare the stack for the call to the resolved function. |
| 5761 | Load(function); |
| 5762 | |
| 5763 | // Allocate a frame slot for the receiver. |
| 5764 | frame_->Push(Factory::undefined_value()); |
| 5765 | int arg_count = args->length(); |
| 5766 | for (int i = 0; i < arg_count; i++) { |
| 5767 | Load(args->at(i)); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5768 | frame_->SpillTop(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5769 | } |
| 5770 | |
| 5771 | // Prepare the stack for the call to ResolvePossiblyDirectEval. |
| 5772 | frame_->PushElementAt(arg_count + 1); |
| 5773 | if (arg_count > 0) { |
| 5774 | frame_->PushElementAt(arg_count); |
| 5775 | } else { |
| 5776 | frame_->Push(Factory::undefined_value()); |
| 5777 | } |
| 5778 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5779 | // Push the receiver. |
| 5780 | frame_->PushParameterAt(-1); |
| 5781 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5782 | // Resolve the call. |
| 5783 | Result result = |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5784 | frame_->CallRuntime(Runtime::kResolvePossiblyDirectEval, 3); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5785 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5786 | // The runtime call returns a pair of values in eax (function) and |
| 5787 | // edx (receiver). Touch up the stack with the right values. |
| 5788 | Result receiver = allocator_->Allocate(edx); |
| 5789 | frame_->SetElementAt(arg_count + 1, &result); |
| 5790 | frame_->SetElementAt(arg_count, &receiver); |
| 5791 | receiver.Unuse(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5792 | |
| 5793 | // Call the function. |
| 5794 | CodeForSourcePosition(node->position()); |
| 5795 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5796 | CallFunctionStub call_function(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 5797 | result = frame_->CallStub(&call_function, arg_count + 1); |
| 5798 | |
| 5799 | // Restore the context and overwrite the function on the stack with |
| 5800 | // the result. |
| 5801 | frame_->RestoreContextRegister(); |
| 5802 | frame_->SetElementAt(0, &result); |
| 5803 | |
| 5804 | } else if (var != NULL && !var->is_this() && var->is_global()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5805 | // ---------------------------------- |
| 5806 | // JavaScript example: 'foo(1, 2, 3)' // foo is global |
| 5807 | // ---------------------------------- |
| 5808 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 5809 | // Pass the global object as the receiver and let the IC stub |
| 5810 | // patch the stack to use the global proxy as 'this' in the |
| 5811 | // invoked function. |
| 5812 | LoadGlobal(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5813 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5814 | // Load the arguments. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5815 | int arg_count = args->length(); |
| 5816 | for (int i = 0; i < arg_count; i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5817 | Load(args->at(i)); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5818 | frame_->SpillTop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5819 | } |
| 5820 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5821 | // Push the name of the function onto the frame. |
| 5822 | frame_->Push(var->name()); |
| 5823 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 5824 | // Call the IC initialization code. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 5825 | CodeForSourcePosition(node->position()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 5826 | Result result = frame_->CallCallIC(RelocInfo::CODE_TARGET_CONTEXT, |
| 5827 | arg_count, |
| 5828 | loop_nesting()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5829 | frame_->RestoreContextRegister(); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5830 | frame_->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5831 | |
| 5832 | } else if (var != NULL && var->slot() != NULL && |
| 5833 | var->slot()->type() == Slot::LOOKUP) { |
| 5834 | // ---------------------------------- |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5835 | // JavaScript examples: |
| 5836 | // |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5837 | // with (obj) foo(1, 2, 3) // foo may be in obj. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5838 | // |
| 5839 | // function f() {}; |
| 5840 | // function g() { |
| 5841 | // eval(...); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5842 | // f(); // f could be in extension object. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5843 | // } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5844 | // ---------------------------------- |
| 5845 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5846 | JumpTarget slow, done; |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5847 | Result function; |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5848 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5849 | // Generate fast case for loading functions from slots that |
| 5850 | // correspond to local/global variables or arguments unless they |
| 5851 | // are shadowed by eval-introduced bindings. |
| 5852 | EmitDynamicLoadFromSlotFastCase(var->slot(), |
| 5853 | NOT_INSIDE_TYPEOF, |
| 5854 | &function, |
| 5855 | &slow, |
| 5856 | &done); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5857 | |
| 5858 | slow.Bind(); |
| 5859 | // Enter the runtime system to load the function from the context. |
| 5860 | // Sync the frame so we can push the arguments directly into |
| 5861 | // place. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 5862 | frame_->SyncRange(0, frame_->element_count() - 1); |
| 5863 | frame_->EmitPush(esi); |
| 5864 | frame_->EmitPush(Immediate(var->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5865 | frame_->CallRuntime(Runtime::kLoadContextSlot, 2); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 5866 | // The runtime call returns a pair of values in eax and edx. The |
| 5867 | // looked-up function is in eax and the receiver is in edx. These |
| 5868 | // register references are not ref counted here. We spill them |
| 5869 | // eagerly since they are arguments to an inevitable call (and are |
| 5870 | // not sharable by the arguments). |
| 5871 | ASSERT(!allocator()->is_used(eax)); |
| 5872 | frame_->EmitPush(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5873 | |
| 5874 | // Load the receiver. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 5875 | ASSERT(!allocator()->is_used(edx)); |
| 5876 | frame_->EmitPush(edx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5877 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5878 | // If fast case code has been generated, emit code to push the |
| 5879 | // function and receiver and have the slow path jump around this |
| 5880 | // code. |
| 5881 | if (done.is_linked()) { |
| 5882 | JumpTarget call; |
| 5883 | call.Jump(); |
| 5884 | done.Bind(&function); |
| 5885 | frame_->Push(&function); |
| 5886 | LoadGlobalReceiver(); |
| 5887 | call.Bind(); |
| 5888 | } |
| 5889 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5890 | // Call the function. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5891 | CallWithArguments(args, NO_CALL_FUNCTION_FLAGS, node->position()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5892 | |
| 5893 | } else if (property != NULL) { |
| 5894 | // Check if the key is a literal string. |
| 5895 | Literal* literal = property->key()->AsLiteral(); |
| 5896 | |
| 5897 | if (literal != NULL && literal->handle()->IsSymbol()) { |
| 5898 | // ------------------------------------------------------------------ |
| 5899 | // JavaScript example: 'object.foo(1, 2, 3)' or 'map["key"](1, 2, 3)' |
| 5900 | // ------------------------------------------------------------------ |
| 5901 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5902 | Handle<String> name = Handle<String>::cast(literal->handle()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5903 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5904 | if (ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION && |
| 5905 | name->IsEqualTo(CStrVector("apply")) && |
| 5906 | args->length() == 2 && |
| 5907 | args->at(1)->AsVariableProxy() != NULL && |
| 5908 | args->at(1)->AsVariableProxy()->IsArguments()) { |
| 5909 | // Use the optimized Function.prototype.apply that avoids |
| 5910 | // allocating lazily allocated arguments objects. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5911 | CallApplyLazy(property->obj(), |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5912 | args->at(0), |
| 5913 | args->at(1)->AsVariableProxy(), |
| 5914 | node->position()); |
| 5915 | |
| 5916 | } else { |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5917 | // Push the receiver onto the frame. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5918 | Load(property->obj()); |
| 5919 | |
| 5920 | // Load the arguments. |
| 5921 | int arg_count = args->length(); |
| 5922 | for (int i = 0; i < arg_count; i++) { |
| 5923 | Load(args->at(i)); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5924 | frame_->SpillTop(); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5925 | } |
| 5926 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5927 | // Push the name of the function onto the frame. |
| 5928 | frame_->Push(name); |
| 5929 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 5930 | // Call the IC initialization code. |
| 5931 | CodeForSourcePosition(node->position()); |
| 5932 | Result result = |
| 5933 | frame_->CallCallIC(RelocInfo::CODE_TARGET, arg_count, |
| 5934 | loop_nesting()); |
| 5935 | frame_->RestoreContextRegister(); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 5936 | frame_->Push(&result); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5937 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5938 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5939 | } else { |
| 5940 | // ------------------------------------------- |
| 5941 | // JavaScript example: 'array[index](1, 2, 3)' |
| 5942 | // ------------------------------------------- |
| 5943 | |
| 5944 | // Load the function to call from the property through a reference. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5945 | |
| 5946 | // Pass receiver to called function. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5947 | if (property->is_synthetic()) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5948 | Reference ref(this, property); |
| 5949 | ref.GetValue(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5950 | // Use global object as receiver. |
| 5951 | LoadGlobalReceiver(); |
| 5952 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5953 | Load(property->obj()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5954 | frame()->Dup(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5955 | Load(property->key()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5956 | Result function = EmitKeyedLoad(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5957 | Result receiver = frame_->Pop(); |
| 5958 | frame_->Push(&function); |
| 5959 | frame_->Push(&receiver); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5960 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5961 | |
| 5962 | // Call the function. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5963 | CallWithArguments(args, RECEIVER_MIGHT_BE_VALUE, node->position()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5964 | } |
| 5965 | |
| 5966 | } else { |
| 5967 | // ---------------------------------- |
| 5968 | // JavaScript example: 'foo(1, 2, 3)' // foo is not global |
| 5969 | // ---------------------------------- |
| 5970 | |
| 5971 | // Load the function. |
| 5972 | Load(function); |
| 5973 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 5974 | // Pass the global proxy as the receiver. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5975 | LoadGlobalReceiver(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5976 | |
| 5977 | // Call the function. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5978 | CallWithArguments(args, NO_CALL_FUNCTION_FLAGS, node->position()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5979 | } |
| 5980 | } |
| 5981 | |
| 5982 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5983 | void CodeGenerator::VisitCallNew(CallNew* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 5984 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5985 | Comment cmnt(masm_, "[ CallNew"); |
| 5986 | |
| 5987 | // According to ECMA-262, section 11.2.2, page 44, the function |
| 5988 | // expression in new calls must be evaluated before the |
| 5989 | // arguments. This is different from ordinary calls, where the |
| 5990 | // actual function to call is resolved after the arguments have been |
| 5991 | // evaluated. |
| 5992 | |
| 5993 | // Compute function to call and use the global object as the |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 5994 | // receiver. There is no need to use the global proxy here because |
| 5995 | // it will always be replaced with a newly allocated object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5996 | Load(node->expression()); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 5997 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5998 | |
| 5999 | // Push the arguments ("left-to-right") on the stack. |
| 6000 | ZoneList<Expression*>* args = node->arguments(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6001 | int arg_count = args->length(); |
| 6002 | for (int i = 0; i < arg_count; i++) { |
| 6003 | Load(args->at(i)); |
| 6004 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6005 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6006 | // Call the construct call builtin that handles allocation and |
| 6007 | // constructor invocation. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6008 | CodeForSourcePosition(node->position()); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 6009 | Result result = frame_->CallConstructor(arg_count); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6010 | // Replace the function on the stack with the result. |
| 6011 | frame_->SetElementAt(0, &result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6012 | } |
| 6013 | |
| 6014 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6015 | void CodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6016 | ASSERT(args->length() == 1); |
| 6017 | Load(args->at(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6018 | Result value = frame_->Pop(); |
| 6019 | value.ToRegister(); |
| 6020 | ASSERT(value.is_valid()); |
| 6021 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 6022 | value.Unuse(); |
| 6023 | destination()->Split(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6024 | } |
| 6025 | |
| 6026 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6027 | void CodeGenerator::GenerateLog(ZoneList<Expression*>* args) { |
| 6028 | // Conditionally generate a log call. |
| 6029 | // Args: |
| 6030 | // 0 (literal string): The type of logging (corresponds to the flags). |
| 6031 | // This is used to determine whether or not to generate the log call. |
| 6032 | // 1 (string): Format string. Access the string at argument index 2 |
| 6033 | // with '%2s' (see Logger::LogRuntime for all the formats). |
| 6034 | // 2 (array): Arguments to the format string. |
| 6035 | ASSERT_EQ(args->length(), 3); |
christian.plesner.hansen@gmail.com | aca4968 | 2009-01-07 14:29:04 +0000 | [diff] [blame] | 6036 | #ifdef ENABLE_LOGGING_AND_PROFILING |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6037 | if (ShouldGenerateLog(args->at(0))) { |
| 6038 | Load(args->at(1)); |
| 6039 | Load(args->at(2)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6040 | frame_->CallRuntime(Runtime::kLog, 2); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6041 | } |
christian.plesner.hansen@gmail.com | aca4968 | 2009-01-07 14:29:04 +0000 | [diff] [blame] | 6042 | #endif |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6043 | // Finally, we're expected to leave a value on the top of the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6044 | frame_->Push(Factory::undefined_value()); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6045 | } |
| 6046 | |
| 6047 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6048 | void CodeGenerator::GenerateIsNonNegativeSmi(ZoneList<Expression*>* args) { |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 6049 | ASSERT(args->length() == 1); |
| 6050 | Load(args->at(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6051 | Result value = frame_->Pop(); |
| 6052 | value.ToRegister(); |
| 6053 | ASSERT(value.is_valid()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6054 | __ test(value.reg(), Immediate(kSmiTagMask | kSmiSignMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6055 | value.Unuse(); |
| 6056 | destination()->Split(zero); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 6057 | } |
| 6058 | |
| 6059 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6060 | class DeferredStringCharCodeAt : public DeferredCode { |
| 6061 | public: |
| 6062 | DeferredStringCharCodeAt(Register object, |
| 6063 | Register index, |
| 6064 | Register scratch, |
| 6065 | Register result) |
| 6066 | : result_(result), |
| 6067 | char_code_at_generator_(object, |
| 6068 | index, |
| 6069 | scratch, |
| 6070 | result, |
| 6071 | &need_conversion_, |
| 6072 | &need_conversion_, |
| 6073 | &index_out_of_range_, |
| 6074 | STRING_INDEX_IS_NUMBER) {} |
| 6075 | |
| 6076 | StringCharCodeAtGenerator* fast_case_generator() { |
| 6077 | return &char_code_at_generator_; |
| 6078 | } |
| 6079 | |
| 6080 | virtual void Generate() { |
| 6081 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 6082 | char_code_at_generator_.GenerateSlow(masm(), call_helper); |
| 6083 | |
| 6084 | __ bind(&need_conversion_); |
| 6085 | // Move the undefined value into the result register, which will |
| 6086 | // trigger conversion. |
| 6087 | __ Set(result_, Immediate(Factory::undefined_value())); |
| 6088 | __ jmp(exit_label()); |
| 6089 | |
| 6090 | __ bind(&index_out_of_range_); |
| 6091 | // When the index is out of range, the spec requires us to return |
| 6092 | // NaN. |
| 6093 | __ Set(result_, Immediate(Factory::nan_value())); |
| 6094 | __ jmp(exit_label()); |
| 6095 | } |
| 6096 | |
| 6097 | private: |
| 6098 | Register result_; |
| 6099 | |
| 6100 | Label need_conversion_; |
| 6101 | Label index_out_of_range_; |
| 6102 | |
| 6103 | StringCharCodeAtGenerator char_code_at_generator_; |
| 6104 | }; |
| 6105 | |
| 6106 | |
| 6107 | // This generates code that performs a String.prototype.charCodeAt() call |
| 6108 | // or returns a smi in order to trigger conversion. |
| 6109 | void CodeGenerator::GenerateStringCharCodeAt(ZoneList<Expression*>* args) { |
| 6110 | Comment(masm_, "[ GenerateStringCharCodeAt"); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6111 | ASSERT(args->length() == 2); |
| 6112 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6113 | Load(args->at(0)); |
ager@chromium.org | 8bb6058 | 2008-12-11 12:02:20 +0000 | [diff] [blame] | 6114 | Load(args->at(1)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6115 | Result index = frame_->Pop(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6116 | Result object = frame_->Pop(); |
| 6117 | object.ToRegister(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6118 | index.ToRegister(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6119 | // We might mutate the object register. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6120 | frame_->Spill(object.reg()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6121 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6122 | // We need two extra registers. |
| 6123 | Result result = allocator()->Allocate(); |
| 6124 | ASSERT(result.is_valid()); |
| 6125 | Result scratch = allocator()->Allocate(); |
| 6126 | ASSERT(scratch.is_valid()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6127 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6128 | DeferredStringCharCodeAt* deferred = |
| 6129 | new DeferredStringCharCodeAt(object.reg(), |
| 6130 | index.reg(), |
| 6131 | scratch.reg(), |
| 6132 | result.reg()); |
| 6133 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 6134 | deferred->BindExit(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6135 | frame_->Push(&result); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 6136 | } |
| 6137 | |
| 6138 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6139 | class DeferredStringCharFromCode : public DeferredCode { |
| 6140 | public: |
| 6141 | DeferredStringCharFromCode(Register code, |
| 6142 | Register result) |
| 6143 | : char_from_code_generator_(code, result) {} |
| 6144 | |
| 6145 | StringCharFromCodeGenerator* fast_case_generator() { |
| 6146 | return &char_from_code_generator_; |
| 6147 | } |
| 6148 | |
| 6149 | virtual void Generate() { |
| 6150 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 6151 | char_from_code_generator_.GenerateSlow(masm(), call_helper); |
| 6152 | } |
| 6153 | |
| 6154 | private: |
| 6155 | StringCharFromCodeGenerator char_from_code_generator_; |
| 6156 | }; |
| 6157 | |
| 6158 | |
| 6159 | // Generates code for creating a one-char string from a char code. |
| 6160 | void CodeGenerator::GenerateStringCharFromCode(ZoneList<Expression*>* args) { |
| 6161 | Comment(masm_, "[ GenerateStringCharFromCode"); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6162 | ASSERT(args->length() == 1); |
| 6163 | |
| 6164 | Load(args->at(0)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6165 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6166 | Result code = frame_->Pop(); |
| 6167 | code.ToRegister(); |
| 6168 | ASSERT(code.is_valid()); |
| 6169 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6170 | Result result = allocator()->Allocate(); |
| 6171 | ASSERT(result.is_valid()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6172 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6173 | DeferredStringCharFromCode* deferred = new DeferredStringCharFromCode( |
| 6174 | code.reg(), result.reg()); |
| 6175 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 6176 | deferred->BindExit(); |
| 6177 | frame_->Push(&result); |
| 6178 | } |
| 6179 | |
| 6180 | |
| 6181 | class DeferredStringCharAt : public DeferredCode { |
| 6182 | public: |
| 6183 | DeferredStringCharAt(Register object, |
| 6184 | Register index, |
| 6185 | Register scratch1, |
| 6186 | Register scratch2, |
| 6187 | Register result) |
| 6188 | : result_(result), |
| 6189 | char_at_generator_(object, |
| 6190 | index, |
| 6191 | scratch1, |
| 6192 | scratch2, |
| 6193 | result, |
| 6194 | &need_conversion_, |
| 6195 | &need_conversion_, |
| 6196 | &index_out_of_range_, |
| 6197 | STRING_INDEX_IS_NUMBER) {} |
| 6198 | |
| 6199 | StringCharAtGenerator* fast_case_generator() { |
| 6200 | return &char_at_generator_; |
| 6201 | } |
| 6202 | |
| 6203 | virtual void Generate() { |
| 6204 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 6205 | char_at_generator_.GenerateSlow(masm(), call_helper); |
| 6206 | |
| 6207 | __ bind(&need_conversion_); |
| 6208 | // Move smi zero into the result register, which will trigger |
| 6209 | // conversion. |
| 6210 | __ Set(result_, Immediate(Smi::FromInt(0))); |
| 6211 | __ jmp(exit_label()); |
| 6212 | |
| 6213 | __ bind(&index_out_of_range_); |
| 6214 | // When the index is out of range, the spec requires us to return |
| 6215 | // the empty string. |
| 6216 | __ Set(result_, Immediate(Factory::empty_string())); |
| 6217 | __ jmp(exit_label()); |
| 6218 | } |
| 6219 | |
| 6220 | private: |
| 6221 | Register result_; |
| 6222 | |
| 6223 | Label need_conversion_; |
| 6224 | Label index_out_of_range_; |
| 6225 | |
| 6226 | StringCharAtGenerator char_at_generator_; |
| 6227 | }; |
| 6228 | |
| 6229 | |
| 6230 | // This generates code that performs a String.prototype.charAt() call |
| 6231 | // or returns a smi in order to trigger conversion. |
| 6232 | void CodeGenerator::GenerateStringCharAt(ZoneList<Expression*>* args) { |
| 6233 | Comment(masm_, "[ GenerateStringCharAt"); |
| 6234 | ASSERT(args->length() == 2); |
| 6235 | |
| 6236 | Load(args->at(0)); |
| 6237 | Load(args->at(1)); |
| 6238 | Result index = frame_->Pop(); |
| 6239 | Result object = frame_->Pop(); |
| 6240 | object.ToRegister(); |
| 6241 | index.ToRegister(); |
| 6242 | // We might mutate the object register. |
| 6243 | frame_->Spill(object.reg()); |
| 6244 | |
| 6245 | // We need three extra registers. |
| 6246 | Result result = allocator()->Allocate(); |
| 6247 | ASSERT(result.is_valid()); |
| 6248 | Result scratch1 = allocator()->Allocate(); |
| 6249 | ASSERT(scratch1.is_valid()); |
| 6250 | Result scratch2 = allocator()->Allocate(); |
| 6251 | ASSERT(scratch2.is_valid()); |
| 6252 | |
| 6253 | DeferredStringCharAt* deferred = |
| 6254 | new DeferredStringCharAt(object.reg(), |
| 6255 | index.reg(), |
| 6256 | scratch1.reg(), |
| 6257 | scratch2.reg(), |
| 6258 | result.reg()); |
| 6259 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 6260 | deferred->BindExit(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6261 | frame_->Push(&result); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6262 | } |
| 6263 | |
| 6264 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6265 | void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6266 | ASSERT(args->length() == 1); |
| 6267 | Load(args->at(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6268 | Result value = frame_->Pop(); |
| 6269 | value.ToRegister(); |
| 6270 | ASSERT(value.is_valid()); |
| 6271 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 6272 | destination()->false_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6273 | // It is a heap object - get map. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6274 | Result temp = allocator()->Allocate(); |
| 6275 | ASSERT(temp.is_valid()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6276 | // Check if the object is a JS array or not. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6277 | __ CmpObjectType(value.reg(), JS_ARRAY_TYPE, temp.reg()); |
| 6278 | value.Unuse(); |
| 6279 | temp.Unuse(); |
| 6280 | destination()->Split(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6281 | } |
| 6282 | |
| 6283 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 6284 | void CodeGenerator::GenerateIsRegExp(ZoneList<Expression*>* args) { |
| 6285 | ASSERT(args->length() == 1); |
| 6286 | Load(args->at(0)); |
| 6287 | Result value = frame_->Pop(); |
| 6288 | value.ToRegister(); |
| 6289 | ASSERT(value.is_valid()); |
| 6290 | __ test(value.reg(), Immediate(kSmiTagMask)); |
| 6291 | destination()->false_target()->Branch(equal); |
| 6292 | // It is a heap object - get map. |
| 6293 | Result temp = allocator()->Allocate(); |
| 6294 | ASSERT(temp.is_valid()); |
| 6295 | // Check if the object is a regexp. |
| 6296 | __ CmpObjectType(value.reg(), JS_REGEXP_TYPE, temp.reg()); |
| 6297 | value.Unuse(); |
| 6298 | temp.Unuse(); |
| 6299 | destination()->Split(equal); |
| 6300 | } |
| 6301 | |
| 6302 | |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 6303 | void CodeGenerator::GenerateIsObject(ZoneList<Expression*>* args) { |
| 6304 | // This generates a fast version of: |
| 6305 | // (typeof(arg) === 'object' || %_ClassOf(arg) == 'RegExp') |
| 6306 | ASSERT(args->length() == 1); |
| 6307 | Load(args->at(0)); |
| 6308 | Result obj = frame_->Pop(); |
| 6309 | obj.ToRegister(); |
| 6310 | |
| 6311 | __ test(obj.reg(), Immediate(kSmiTagMask)); |
| 6312 | destination()->false_target()->Branch(zero); |
| 6313 | __ cmp(obj.reg(), Factory::null_value()); |
| 6314 | destination()->true_target()->Branch(equal); |
| 6315 | |
| 6316 | Result map = allocator()->Allocate(); |
| 6317 | ASSERT(map.is_valid()); |
| 6318 | __ mov(map.reg(), FieldOperand(obj.reg(), HeapObject::kMapOffset)); |
| 6319 | // Undetectable objects behave like undefined when tested with typeof. |
| 6320 | __ movzx_b(map.reg(), FieldOperand(map.reg(), Map::kBitFieldOffset)); |
| 6321 | __ test(map.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 6322 | destination()->false_target()->Branch(not_zero); |
| 6323 | __ mov(map.reg(), FieldOperand(obj.reg(), HeapObject::kMapOffset)); |
| 6324 | __ movzx_b(map.reg(), FieldOperand(map.reg(), Map::kInstanceTypeOffset)); |
| 6325 | __ cmp(map.reg(), FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6326 | destination()->false_target()->Branch(below); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 6327 | __ cmp(map.reg(), LAST_JS_OBJECT_TYPE); |
| 6328 | obj.Unuse(); |
| 6329 | map.Unuse(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6330 | destination()->Split(below_equal); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 6331 | } |
| 6332 | |
| 6333 | |
| 6334 | void CodeGenerator::GenerateIsFunction(ZoneList<Expression*>* args) { |
| 6335 | // This generates a fast version of: |
| 6336 | // (%_ClassOf(arg) === 'Function') |
| 6337 | ASSERT(args->length() == 1); |
| 6338 | Load(args->at(0)); |
| 6339 | Result obj = frame_->Pop(); |
| 6340 | obj.ToRegister(); |
| 6341 | __ test(obj.reg(), Immediate(kSmiTagMask)); |
| 6342 | destination()->false_target()->Branch(zero); |
| 6343 | Result temp = allocator()->Allocate(); |
| 6344 | ASSERT(temp.is_valid()); |
| 6345 | __ CmpObjectType(obj.reg(), JS_FUNCTION_TYPE, temp.reg()); |
| 6346 | obj.Unuse(); |
| 6347 | temp.Unuse(); |
| 6348 | destination()->Split(equal); |
| 6349 | } |
| 6350 | |
| 6351 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6352 | void CodeGenerator::GenerateIsUndetectableObject(ZoneList<Expression*>* args) { |
| 6353 | ASSERT(args->length() == 1); |
| 6354 | Load(args->at(0)); |
| 6355 | Result obj = frame_->Pop(); |
| 6356 | obj.ToRegister(); |
| 6357 | __ test(obj.reg(), Immediate(kSmiTagMask)); |
| 6358 | destination()->false_target()->Branch(zero); |
| 6359 | Result temp = allocator()->Allocate(); |
| 6360 | ASSERT(temp.is_valid()); |
| 6361 | __ mov(temp.reg(), |
| 6362 | FieldOperand(obj.reg(), HeapObject::kMapOffset)); |
| 6363 | __ movzx_b(temp.reg(), |
| 6364 | FieldOperand(temp.reg(), Map::kBitFieldOffset)); |
| 6365 | __ test(temp.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 6366 | obj.Unuse(); |
| 6367 | temp.Unuse(); |
| 6368 | destination()->Split(not_zero); |
| 6369 | } |
| 6370 | |
| 6371 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6372 | void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) { |
| 6373 | ASSERT(args->length() == 0); |
| 6374 | |
| 6375 | // Get the frame pointer for the calling frame. |
| 6376 | Result fp = allocator()->Allocate(); |
| 6377 | __ mov(fp.reg(), Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 6378 | |
| 6379 | // Skip the arguments adaptor frame if it exists. |
| 6380 | Label check_frame_marker; |
| 6381 | __ cmp(Operand(fp.reg(), StandardFrameConstants::kContextOffset), |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 6382 | Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6383 | __ j(not_equal, &check_frame_marker); |
| 6384 | __ mov(fp.reg(), Operand(fp.reg(), StandardFrameConstants::kCallerFPOffset)); |
| 6385 | |
| 6386 | // Check the marker in the calling frame. |
| 6387 | __ bind(&check_frame_marker); |
| 6388 | __ cmp(Operand(fp.reg(), StandardFrameConstants::kMarkerOffset), |
| 6389 | Immediate(Smi::FromInt(StackFrame::CONSTRUCT))); |
| 6390 | fp.Unuse(); |
| 6391 | destination()->Split(equal); |
| 6392 | } |
| 6393 | |
| 6394 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6395 | void CodeGenerator::GenerateArgumentsLength(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6396 | ASSERT(args->length() == 0); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 6397 | |
| 6398 | Result fp = allocator_->Allocate(); |
| 6399 | Result result = allocator_->Allocate(); |
| 6400 | ASSERT(fp.is_valid() && result.is_valid()); |
| 6401 | |
| 6402 | Label exit; |
| 6403 | |
| 6404 | // Get the number of formal parameters. |
| 6405 | __ Set(result.reg(), Immediate(Smi::FromInt(scope()->num_parameters()))); |
| 6406 | |
| 6407 | // Check if the calling frame is an arguments adaptor frame. |
| 6408 | __ mov(fp.reg(), Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 6409 | __ cmp(Operand(fp.reg(), StandardFrameConstants::kContextOffset), |
| 6410 | Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 6411 | __ j(not_equal, &exit); |
| 6412 | |
| 6413 | // Arguments adaptor case: Read the arguments length from the |
| 6414 | // adaptor frame. |
| 6415 | __ mov(result.reg(), |
| 6416 | Operand(fp.reg(), ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 6417 | |
| 6418 | __ bind(&exit); |
| 6419 | result.set_type_info(TypeInfo::Smi()); |
| 6420 | if (FLAG_debug_code) __ AbortIfNotSmi(result.reg()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6421 | frame_->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6422 | } |
| 6423 | |
| 6424 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6425 | void CodeGenerator::GenerateClassOf(ZoneList<Expression*>* args) { |
| 6426 | ASSERT(args->length() == 1); |
| 6427 | JumpTarget leave, null, function, non_function_constructor; |
| 6428 | Load(args->at(0)); // Load the object. |
| 6429 | Result obj = frame_->Pop(); |
| 6430 | obj.ToRegister(); |
| 6431 | frame_->Spill(obj.reg()); |
| 6432 | |
| 6433 | // If the object is a smi, we return null. |
| 6434 | __ test(obj.reg(), Immediate(kSmiTagMask)); |
| 6435 | null.Branch(zero); |
| 6436 | |
| 6437 | // Check that the object is a JS object but take special care of JS |
| 6438 | // functions to make sure they have 'Function' as their class. |
| 6439 | { Result tmp = allocator()->Allocate(); |
| 6440 | __ mov(obj.reg(), FieldOperand(obj.reg(), HeapObject::kMapOffset)); |
| 6441 | __ movzx_b(tmp.reg(), FieldOperand(obj.reg(), Map::kInstanceTypeOffset)); |
| 6442 | __ cmp(tmp.reg(), FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6443 | null.Branch(below); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6444 | |
| 6445 | // As long as JS_FUNCTION_TYPE is the last instance type and it is |
| 6446 | // right after LAST_JS_OBJECT_TYPE, we can avoid checking for |
| 6447 | // LAST_JS_OBJECT_TYPE. |
| 6448 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 6449 | ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
| 6450 | __ cmp(tmp.reg(), JS_FUNCTION_TYPE); |
| 6451 | function.Branch(equal); |
| 6452 | } |
| 6453 | |
| 6454 | // Check if the constructor in the map is a function. |
| 6455 | { Result tmp = allocator()->Allocate(); |
| 6456 | __ mov(obj.reg(), FieldOperand(obj.reg(), Map::kConstructorOffset)); |
| 6457 | __ CmpObjectType(obj.reg(), JS_FUNCTION_TYPE, tmp.reg()); |
| 6458 | non_function_constructor.Branch(not_equal); |
| 6459 | } |
| 6460 | |
| 6461 | // The map register now contains the constructor function. Grab the |
| 6462 | // instance class name from there. |
| 6463 | __ mov(obj.reg(), |
| 6464 | FieldOperand(obj.reg(), JSFunction::kSharedFunctionInfoOffset)); |
| 6465 | __ mov(obj.reg(), |
| 6466 | FieldOperand(obj.reg(), SharedFunctionInfo::kInstanceClassNameOffset)); |
| 6467 | frame_->Push(&obj); |
| 6468 | leave.Jump(); |
| 6469 | |
| 6470 | // Functions have class 'Function'. |
| 6471 | function.Bind(); |
| 6472 | frame_->Push(Factory::function_class_symbol()); |
| 6473 | leave.Jump(); |
| 6474 | |
| 6475 | // Objects with a non-function constructor have class 'Object'. |
| 6476 | non_function_constructor.Bind(); |
| 6477 | frame_->Push(Factory::Object_symbol()); |
| 6478 | leave.Jump(); |
| 6479 | |
| 6480 | // Non-JS objects have class null. |
| 6481 | null.Bind(); |
| 6482 | frame_->Push(Factory::null_value()); |
| 6483 | |
| 6484 | // All done. |
| 6485 | leave.Bind(); |
| 6486 | } |
| 6487 | |
| 6488 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6489 | void CodeGenerator::GenerateValueOf(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6490 | ASSERT(args->length() == 1); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 6491 | JumpTarget leave; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6492 | Load(args->at(0)); // Load the object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6493 | frame_->Dup(); |
| 6494 | Result object = frame_->Pop(); |
| 6495 | object.ToRegister(); |
| 6496 | ASSERT(object.is_valid()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6497 | // if (object->IsSmi()) return object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6498 | __ test(object.reg(), Immediate(kSmiTagMask)); |
| 6499 | leave.Branch(zero, taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6500 | // It is a heap object - get map. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6501 | Result temp = allocator()->Allocate(); |
| 6502 | ASSERT(temp.is_valid()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6503 | // if (!object->IsJSValue()) return object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6504 | __ CmpObjectType(object.reg(), JS_VALUE_TYPE, temp.reg()); |
| 6505 | leave.Branch(not_equal, not_taken); |
| 6506 | __ mov(temp.reg(), FieldOperand(object.reg(), JSValue::kValueOffset)); |
| 6507 | object.Unuse(); |
| 6508 | frame_->SetElementAt(0, &temp); |
| 6509 | leave.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6510 | } |
| 6511 | |
| 6512 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6513 | void CodeGenerator::GenerateSetValueOf(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6514 | ASSERT(args->length() == 2); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 6515 | JumpTarget leave; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6516 | Load(args->at(0)); // Load the object. |
| 6517 | Load(args->at(1)); // Load the value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6518 | Result value = frame_->Pop(); |
| 6519 | Result object = frame_->Pop(); |
| 6520 | value.ToRegister(); |
| 6521 | object.ToRegister(); |
| 6522 | |
| 6523 | // if (object->IsSmi()) return value. |
| 6524 | __ test(object.reg(), Immediate(kSmiTagMask)); |
| 6525 | leave.Branch(zero, &value, taken); |
| 6526 | |
| 6527 | // It is a heap object - get its map. |
| 6528 | Result scratch = allocator_->Allocate(); |
| 6529 | ASSERT(scratch.is_valid()); |
| 6530 | // if (!object->IsJSValue()) return value. |
| 6531 | __ CmpObjectType(object.reg(), JS_VALUE_TYPE, scratch.reg()); |
| 6532 | leave.Branch(not_equal, &value, not_taken); |
| 6533 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6534 | // Store the value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6535 | __ mov(FieldOperand(object.reg(), JSValue::kValueOffset), value.reg()); |
| 6536 | // Update the write barrier. Save the value as it will be |
| 6537 | // overwritten by the write barrier code and is needed afterward. |
| 6538 | Result duplicate_value = allocator_->Allocate(); |
| 6539 | ASSERT(duplicate_value.is_valid()); |
| 6540 | __ mov(duplicate_value.reg(), value.reg()); |
| 6541 | // The object register is also overwritten by the write barrier and |
| 6542 | // possibly aliased in the frame. |
| 6543 | frame_->Spill(object.reg()); |
| 6544 | __ RecordWrite(object.reg(), JSValue::kValueOffset, duplicate_value.reg(), |
| 6545 | scratch.reg()); |
| 6546 | object.Unuse(); |
| 6547 | scratch.Unuse(); |
| 6548 | duplicate_value.Unuse(); |
| 6549 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6550 | // Leave. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6551 | leave.Bind(&value); |
| 6552 | frame_->Push(&value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6553 | } |
| 6554 | |
| 6555 | |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 6556 | void CodeGenerator::GenerateArguments(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6557 | ASSERT(args->length() == 1); |
| 6558 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 6559 | // ArgumentsAccessStub expects the key in edx and the formal |
| 6560 | // parameter count in eax. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6561 | Load(args->at(0)); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 6562 | Result key = frame_->Pop(); |
| 6563 | // Explicitly create a constant result. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6564 | Result count(Handle<Smi>(Smi::FromInt(scope()->num_parameters()))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6565 | // Call the shared stub to get to arguments[key]. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6566 | ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 6567 | Result result = frame_->CallStub(&stub, &key, &count); |
| 6568 | frame_->Push(&result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6569 | } |
| 6570 | |
| 6571 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6572 | void CodeGenerator::GenerateObjectEquals(ZoneList<Expression*>* args) { |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6573 | ASSERT(args->length() == 2); |
| 6574 | |
| 6575 | // Load the two objects into registers and perform the comparison. |
| 6576 | Load(args->at(0)); |
| 6577 | Load(args->at(1)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6578 | Result right = frame_->Pop(); |
| 6579 | Result left = frame_->Pop(); |
| 6580 | right.ToRegister(); |
| 6581 | left.ToRegister(); |
| 6582 | __ cmp(right.reg(), Operand(left.reg())); |
| 6583 | right.Unuse(); |
| 6584 | left.Unuse(); |
| 6585 | destination()->Split(equal); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 6586 | } |
| 6587 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 6588 | |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 6589 | void CodeGenerator::GenerateGetFramePointer(ZoneList<Expression*>* args) { |
| 6590 | ASSERT(args->length() == 0); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 6591 | ASSERT(kSmiTag == 0); // EBP value is aligned, so it should look like Smi. |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 6592 | Result ebp_as_smi = allocator_->Allocate(); |
| 6593 | ASSERT(ebp_as_smi.is_valid()); |
| 6594 | __ mov(ebp_as_smi.reg(), Operand(ebp)); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 6595 | frame_->Push(&ebp_as_smi); |
| 6596 | } |
| 6597 | |
| 6598 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 6599 | void CodeGenerator::GenerateRandomHeapNumber( |
| 6600 | ZoneList<Expression*>* args) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6601 | ASSERT(args->length() == 0); |
| 6602 | frame_->SpillAll(); |
| 6603 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 6604 | Label slow_allocate_heapnumber; |
| 6605 | Label heapnumber_allocated; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6606 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 6607 | __ AllocateHeapNumber(edi, ebx, ecx, &slow_allocate_heapnumber); |
| 6608 | __ jmp(&heapnumber_allocated); |
| 6609 | |
| 6610 | __ bind(&slow_allocate_heapnumber); |
| 6611 | // To allocate a heap number, and ensure that it is not a smi, we |
| 6612 | // call the runtime function FUnaryMinus on 0, returning the double |
| 6613 | // -0.0. A new, distinct heap number is returned each time. |
| 6614 | __ push(Immediate(Smi::FromInt(0))); |
| 6615 | __ CallRuntime(Runtime::kNumberUnaryMinus, 1); |
| 6616 | __ mov(edi, eax); |
| 6617 | |
| 6618 | __ bind(&heapnumber_allocated); |
| 6619 | |
| 6620 | __ PrepareCallCFunction(0, ebx); |
| 6621 | __ CallCFunction(ExternalReference::random_uint32_function(), 0); |
| 6622 | |
| 6623 | // Convert 32 random bits in eax to 0.(32 random bits) in a double |
| 6624 | // by computing: |
| 6625 | // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). |
| 6626 | // This is implemented on both SSE2 and FPU. |
| 6627 | if (CpuFeatures::IsSupported(SSE2)) { |
| 6628 | CpuFeatures::Scope fscope(SSE2); |
| 6629 | __ mov(ebx, Immediate(0x49800000)); // 1.0 x 2^20 as single. |
| 6630 | __ movd(xmm1, Operand(ebx)); |
| 6631 | __ movd(xmm0, Operand(eax)); |
| 6632 | __ cvtss2sd(xmm1, xmm1); |
| 6633 | __ pxor(xmm0, xmm1); |
| 6634 | __ subsd(xmm0, xmm1); |
| 6635 | __ movdbl(FieldOperand(edi, HeapNumber::kValueOffset), xmm0); |
| 6636 | } else { |
| 6637 | // 0x4130000000000000 is 1.0 x 2^20 as a double. |
| 6638 | __ mov(FieldOperand(edi, HeapNumber::kExponentOffset), |
| 6639 | Immediate(0x41300000)); |
| 6640 | __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), eax); |
| 6641 | __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| 6642 | __ mov(FieldOperand(edi, HeapNumber::kMantissaOffset), Immediate(0)); |
| 6643 | __ fld_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| 6644 | __ fsubp(1); |
| 6645 | __ fstp_d(FieldOperand(edi, HeapNumber::kValueOffset)); |
| 6646 | } |
| 6647 | __ mov(eax, edi); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6648 | |
| 6649 | Result result = allocator_->Allocate(eax); |
| 6650 | frame_->Push(&result); |
| 6651 | } |
| 6652 | |
| 6653 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 6654 | void CodeGenerator::GenerateStringAdd(ZoneList<Expression*>* args) { |
| 6655 | ASSERT_EQ(2, args->length()); |
| 6656 | |
| 6657 | Load(args->at(0)); |
| 6658 | Load(args->at(1)); |
| 6659 | |
| 6660 | StringAddStub stub(NO_STRING_ADD_FLAGS); |
| 6661 | Result answer = frame_->CallStub(&stub, 2); |
| 6662 | frame_->Push(&answer); |
| 6663 | } |
| 6664 | |
| 6665 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6666 | void CodeGenerator::GenerateSubString(ZoneList<Expression*>* args) { |
| 6667 | ASSERT_EQ(3, args->length()); |
| 6668 | |
| 6669 | Load(args->at(0)); |
| 6670 | Load(args->at(1)); |
| 6671 | Load(args->at(2)); |
| 6672 | |
| 6673 | SubStringStub stub; |
| 6674 | Result answer = frame_->CallStub(&stub, 3); |
| 6675 | frame_->Push(&answer); |
| 6676 | } |
| 6677 | |
| 6678 | |
| 6679 | void CodeGenerator::GenerateStringCompare(ZoneList<Expression*>* args) { |
| 6680 | ASSERT_EQ(2, args->length()); |
| 6681 | |
| 6682 | Load(args->at(0)); |
| 6683 | Load(args->at(1)); |
| 6684 | |
| 6685 | StringCompareStub stub; |
| 6686 | Result answer = frame_->CallStub(&stub, 2); |
| 6687 | frame_->Push(&answer); |
| 6688 | } |
| 6689 | |
| 6690 | |
| 6691 | void CodeGenerator::GenerateRegExpExec(ZoneList<Expression*>* args) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 6692 | ASSERT_EQ(4, args->length()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6693 | |
| 6694 | // Load the arguments on the stack and call the stub. |
| 6695 | Load(args->at(0)); |
| 6696 | Load(args->at(1)); |
| 6697 | Load(args->at(2)); |
| 6698 | Load(args->at(3)); |
| 6699 | RegExpExecStub stub; |
| 6700 | Result result = frame_->CallStub(&stub, 4); |
| 6701 | frame_->Push(&result); |
| 6702 | } |
| 6703 | |
| 6704 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 6705 | void CodeGenerator::GenerateRegExpConstructResult(ZoneList<Expression*>* args) { |
| 6706 | // No stub. This code only occurs a few times in regexp.js. |
| 6707 | const int kMaxInlineLength = 100; |
| 6708 | ASSERT_EQ(3, args->length()); |
| 6709 | Load(args->at(0)); // Size of array, smi. |
| 6710 | Load(args->at(1)); // "index" property value. |
| 6711 | Load(args->at(2)); // "input" property value. |
| 6712 | { |
| 6713 | VirtualFrame::SpilledScope spilled_scope; |
| 6714 | |
| 6715 | Label slowcase; |
| 6716 | Label done; |
| 6717 | __ mov(ebx, Operand(esp, kPointerSize * 2)); |
| 6718 | __ test(ebx, Immediate(kSmiTagMask)); |
| 6719 | __ j(not_zero, &slowcase); |
| 6720 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(kMaxInlineLength))); |
| 6721 | __ j(above, &slowcase); |
| 6722 | // Smi-tagging is equivalent to multiplying by 2. |
| 6723 | STATIC_ASSERT(kSmiTag == 0); |
| 6724 | STATIC_ASSERT(kSmiTagSize == 1); |
| 6725 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 6726 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 6727 | // Elements: [Map][Length][..elements..] |
| 6728 | __ AllocateInNewSpace(JSRegExpResult::kSize + FixedArray::kHeaderSize, |
| 6729 | times_half_pointer_size, |
| 6730 | ebx, // In: Number of elements (times 2, being a smi) |
| 6731 | eax, // Out: Start of allocation (tagged). |
| 6732 | ecx, // Out: End of allocation. |
| 6733 | edx, // Scratch register |
| 6734 | &slowcase, |
| 6735 | TAG_OBJECT); |
| 6736 | // eax: Start of allocated area, object-tagged. |
| 6737 | |
| 6738 | // Set JSArray map to global.regexp_result_map(). |
| 6739 | // Set empty properties FixedArray. |
| 6740 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 6741 | // Interleave operations for better latency. |
| 6742 | __ mov(edx, ContextOperand(esi, Context::GLOBAL_INDEX)); |
| 6743 | __ mov(ecx, Immediate(Factory::empty_fixed_array())); |
| 6744 | __ lea(ebx, Operand(eax, JSRegExpResult::kSize)); |
| 6745 | __ mov(edx, FieldOperand(edx, GlobalObject::kGlobalContextOffset)); |
| 6746 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 6747 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx); |
| 6748 | __ mov(edx, ContextOperand(edx, Context::REGEXP_RESULT_MAP_INDEX)); |
| 6749 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), edx); |
| 6750 | |
| 6751 | // Set input, index and length fields from arguments. |
| 6752 | __ pop(FieldOperand(eax, JSRegExpResult::kInputOffset)); |
| 6753 | __ pop(FieldOperand(eax, JSRegExpResult::kIndexOffset)); |
| 6754 | __ pop(ecx); |
| 6755 | __ mov(FieldOperand(eax, JSArray::kLengthOffset), ecx); |
| 6756 | |
| 6757 | // Fill out the elements FixedArray. |
| 6758 | // eax: JSArray. |
| 6759 | // ebx: FixedArray. |
| 6760 | // ecx: Number of elements in array, as smi. |
| 6761 | |
| 6762 | // Set map. |
| 6763 | __ mov(FieldOperand(ebx, HeapObject::kMapOffset), |
| 6764 | Immediate(Factory::fixed_array_map())); |
| 6765 | // Set length. |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 6766 | __ mov(FieldOperand(ebx, FixedArray::kLengthOffset), ecx); |
| 6767 | // Fill contents of fixed-array with the-hole. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6768 | __ SmiUntag(ecx); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 6769 | __ mov(edx, Immediate(Factory::the_hole_value())); |
| 6770 | __ lea(ebx, FieldOperand(ebx, FixedArray::kHeaderSize)); |
| 6771 | // Fill fixed array elements with hole. |
| 6772 | // eax: JSArray. |
| 6773 | // ecx: Number of elements to fill. |
| 6774 | // ebx: Start of elements in FixedArray. |
| 6775 | // edx: the hole. |
| 6776 | Label loop; |
| 6777 | __ test(ecx, Operand(ecx)); |
| 6778 | __ bind(&loop); |
| 6779 | __ j(less_equal, &done); // Jump if ecx is negative or zero. |
| 6780 | __ sub(Operand(ecx), Immediate(1)); |
| 6781 | __ mov(Operand(ebx, ecx, times_pointer_size, 0), edx); |
| 6782 | __ jmp(&loop); |
| 6783 | |
| 6784 | __ bind(&slowcase); |
| 6785 | __ CallRuntime(Runtime::kRegExpConstructResult, 3); |
| 6786 | |
| 6787 | __ bind(&done); |
| 6788 | } |
| 6789 | frame_->Forget(3); |
| 6790 | frame_->Push(eax); |
| 6791 | } |
| 6792 | |
| 6793 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6794 | class DeferredSearchCache: public DeferredCode { |
| 6795 | public: |
| 6796 | DeferredSearchCache(Register dst, Register cache, Register key) |
| 6797 | : dst_(dst), cache_(cache), key_(key) { |
| 6798 | set_comment("[ DeferredSearchCache"); |
| 6799 | } |
| 6800 | |
| 6801 | virtual void Generate(); |
| 6802 | |
| 6803 | private: |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6804 | Register dst_; // on invocation Smi index of finger, on exit |
| 6805 | // holds value being looked up. |
| 6806 | Register cache_; // instance of JSFunctionResultCache. |
| 6807 | Register key_; // key being looked up. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6808 | }; |
| 6809 | |
| 6810 | |
| 6811 | void DeferredSearchCache::Generate() { |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6812 | Label first_loop, search_further, second_loop, cache_miss; |
| 6813 | |
| 6814 | // Smi-tagging is equivalent to multiplying by 2. |
| 6815 | STATIC_ASSERT(kSmiTag == 0); |
| 6816 | STATIC_ASSERT(kSmiTagSize == 1); |
| 6817 | |
| 6818 | Smi* kEntrySizeSmi = Smi::FromInt(JSFunctionResultCache::kEntrySize); |
| 6819 | Smi* kEntriesIndexSmi = Smi::FromInt(JSFunctionResultCache::kEntriesIndex); |
| 6820 | |
| 6821 | // Check the cache from finger to start of the cache. |
| 6822 | __ bind(&first_loop); |
| 6823 | __ sub(Operand(dst_), Immediate(kEntrySizeSmi)); |
| 6824 | __ cmp(Operand(dst_), Immediate(kEntriesIndexSmi)); |
| 6825 | __ j(less, &search_further); |
| 6826 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6827 | __ cmp(key_, CodeGenerator::FixedArrayElementOperand(cache_, dst_)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6828 | __ j(not_equal, &first_loop); |
| 6829 | |
| 6830 | __ mov(FieldOperand(cache_, JSFunctionResultCache::kFingerOffset), dst_); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6831 | __ mov(dst_, CodeGenerator::FixedArrayElementOperand(cache_, dst_, 1)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6832 | __ jmp(exit_label()); |
| 6833 | |
| 6834 | __ bind(&search_further); |
| 6835 | |
| 6836 | // Check the cache from end of cache up to finger. |
| 6837 | __ mov(dst_, FieldOperand(cache_, JSFunctionResultCache::kCacheSizeOffset)); |
| 6838 | |
| 6839 | __ bind(&second_loop); |
| 6840 | __ sub(Operand(dst_), Immediate(kEntrySizeSmi)); |
| 6841 | // Consider prefetching into some reg. |
| 6842 | __ cmp(dst_, FieldOperand(cache_, JSFunctionResultCache::kFingerOffset)); |
| 6843 | __ j(less_equal, &cache_miss); |
| 6844 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6845 | __ cmp(key_, CodeGenerator::FixedArrayElementOperand(cache_, dst_)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6846 | __ j(not_equal, &second_loop); |
| 6847 | |
| 6848 | __ mov(FieldOperand(cache_, JSFunctionResultCache::kFingerOffset), dst_); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6849 | __ mov(dst_, CodeGenerator::FixedArrayElementOperand(cache_, dst_, 1)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6850 | __ jmp(exit_label()); |
| 6851 | |
| 6852 | __ bind(&cache_miss); |
| 6853 | __ push(cache_); // store a reference to cache |
| 6854 | __ push(key_); // store a key |
| 6855 | Handle<Object> receiver(Top::global_context()->global()); |
| 6856 | __ push(Immediate(receiver)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6857 | __ push(key_); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6858 | // On ia32 function must be in edi. |
| 6859 | __ mov(edi, FieldOperand(cache_, JSFunctionResultCache::kFactoryOffset)); |
| 6860 | ParameterCount expected(1); |
| 6861 | __ InvokeFunction(edi, expected, CALL_FUNCTION); |
| 6862 | |
| 6863 | // Find a place to put new cached value into. |
| 6864 | Label add_new_entry, update_cache; |
| 6865 | __ mov(ecx, Operand(esp, kPointerSize)); // restore the cache |
| 6866 | // Possible optimization: cache size is constant for the given cache |
| 6867 | // so technically we could use a constant here. However, if we have |
| 6868 | // cache miss this optimization would hardly matter much. |
| 6869 | |
| 6870 | // Check if we could add new entry to cache. |
| 6871 | __ mov(ebx, FieldOperand(ecx, FixedArray::kLengthOffset)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6872 | __ cmp(ebx, FieldOperand(ecx, JSFunctionResultCache::kCacheSizeOffset)); |
| 6873 | __ j(greater, &add_new_entry); |
| 6874 | |
| 6875 | // Check if we could evict entry after finger. |
| 6876 | __ mov(edx, FieldOperand(ecx, JSFunctionResultCache::kFingerOffset)); |
| 6877 | __ add(Operand(edx), Immediate(kEntrySizeSmi)); |
| 6878 | __ cmp(ebx, Operand(edx)); |
| 6879 | __ j(greater, &update_cache); |
| 6880 | |
| 6881 | // Need to wrap over the cache. |
| 6882 | __ mov(edx, Immediate(kEntriesIndexSmi)); |
| 6883 | __ jmp(&update_cache); |
| 6884 | |
| 6885 | __ bind(&add_new_entry); |
| 6886 | __ mov(edx, FieldOperand(ecx, JSFunctionResultCache::kCacheSizeOffset)); |
| 6887 | __ lea(ebx, Operand(edx, JSFunctionResultCache::kEntrySize << 1)); |
| 6888 | __ mov(FieldOperand(ecx, JSFunctionResultCache::kCacheSizeOffset), ebx); |
| 6889 | |
| 6890 | // Update the cache itself. |
| 6891 | // edx holds the index. |
| 6892 | __ bind(&update_cache); |
| 6893 | __ pop(ebx); // restore the key |
| 6894 | __ mov(FieldOperand(ecx, JSFunctionResultCache::kFingerOffset), edx); |
| 6895 | // Store key. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6896 | __ mov(CodeGenerator::FixedArrayElementOperand(ecx, edx), ebx); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6897 | __ RecordWrite(ecx, 0, ebx, edx); |
| 6898 | |
| 6899 | // Store value. |
| 6900 | __ pop(ecx); // restore the cache. |
| 6901 | __ mov(edx, FieldOperand(ecx, JSFunctionResultCache::kFingerOffset)); |
| 6902 | __ add(Operand(edx), Immediate(Smi::FromInt(1))); |
| 6903 | __ mov(ebx, eax); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6904 | __ mov(CodeGenerator::FixedArrayElementOperand(ecx, edx), ebx); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6905 | __ RecordWrite(ecx, 0, ebx, edx); |
| 6906 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6907 | if (!dst_.is(eax)) { |
| 6908 | __ mov(dst_, eax); |
| 6909 | } |
| 6910 | } |
| 6911 | |
| 6912 | |
| 6913 | void CodeGenerator::GenerateGetFromCache(ZoneList<Expression*>* args) { |
| 6914 | ASSERT_EQ(2, args->length()); |
| 6915 | |
| 6916 | ASSERT_NE(NULL, args->at(0)->AsLiteral()); |
| 6917 | int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value(); |
| 6918 | |
| 6919 | Handle<FixedArray> jsfunction_result_caches( |
| 6920 | Top::global_context()->jsfunction_result_caches()); |
| 6921 | if (jsfunction_result_caches->length() <= cache_id) { |
| 6922 | __ Abort("Attempt to use undefined cache."); |
| 6923 | frame_->Push(Factory::undefined_value()); |
| 6924 | return; |
| 6925 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6926 | |
| 6927 | Load(args->at(1)); |
| 6928 | Result key = frame_->Pop(); |
| 6929 | key.ToRegister(); |
| 6930 | |
| 6931 | Result cache = allocator()->Allocate(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6932 | ASSERT(cache.is_valid()); |
| 6933 | __ mov(cache.reg(), ContextOperand(esi, Context::GLOBAL_INDEX)); |
| 6934 | __ mov(cache.reg(), |
| 6935 | FieldOperand(cache.reg(), GlobalObject::kGlobalContextOffset)); |
| 6936 | __ mov(cache.reg(), |
| 6937 | ContextOperand(cache.reg(), Context::JSFUNCTION_RESULT_CACHES_INDEX)); |
| 6938 | __ mov(cache.reg(), |
| 6939 | FieldOperand(cache.reg(), FixedArray::OffsetOfElementAt(cache_id))); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6940 | |
| 6941 | Result tmp = allocator()->Allocate(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6942 | ASSERT(tmp.is_valid()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6943 | |
| 6944 | DeferredSearchCache* deferred = new DeferredSearchCache(tmp.reg(), |
| 6945 | cache.reg(), |
| 6946 | key.reg()); |
| 6947 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6948 | // tmp.reg() now holds finger offset as a smi. |
| 6949 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6950 | __ mov(tmp.reg(), FieldOperand(cache.reg(), |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6951 | JSFunctionResultCache::kFingerOffset)); |
| 6952 | __ cmp(key.reg(), FixedArrayElementOperand(cache.reg(), tmp.reg())); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6953 | deferred->Branch(not_equal); |
| 6954 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 6955 | __ mov(tmp.reg(), FixedArrayElementOperand(cache.reg(), tmp.reg(), 1)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6956 | |
| 6957 | deferred->BindExit(); |
| 6958 | frame_->Push(&tmp); |
| 6959 | } |
| 6960 | |
| 6961 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6962 | void CodeGenerator::GenerateNumberToString(ZoneList<Expression*>* args) { |
| 6963 | ASSERT_EQ(args->length(), 1); |
| 6964 | |
| 6965 | // Load the argument on the stack and call the stub. |
| 6966 | Load(args->at(0)); |
| 6967 | NumberToStringStub stub; |
| 6968 | Result result = frame_->CallStub(&stub, 1); |
| 6969 | frame_->Push(&result); |
| 6970 | } |
| 6971 | |
| 6972 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 6973 | class DeferredSwapElements: public DeferredCode { |
| 6974 | public: |
| 6975 | DeferredSwapElements(Register object, Register index1, Register index2) |
| 6976 | : object_(object), index1_(index1), index2_(index2) { |
| 6977 | set_comment("[ DeferredSwapElements"); |
| 6978 | } |
| 6979 | |
| 6980 | virtual void Generate(); |
| 6981 | |
| 6982 | private: |
| 6983 | Register object_, index1_, index2_; |
| 6984 | }; |
| 6985 | |
| 6986 | |
| 6987 | void DeferredSwapElements::Generate() { |
| 6988 | __ push(object_); |
| 6989 | __ push(index1_); |
| 6990 | __ push(index2_); |
| 6991 | __ CallRuntime(Runtime::kSwapElements, 3); |
| 6992 | } |
| 6993 | |
| 6994 | |
| 6995 | void CodeGenerator::GenerateSwapElements(ZoneList<Expression*>* args) { |
| 6996 | // Note: this code assumes that indices are passed are within |
| 6997 | // elements' bounds and refer to valid (not holes) values. |
| 6998 | Comment cmnt(masm_, "[ GenerateSwapElements"); |
| 6999 | |
| 7000 | ASSERT_EQ(3, args->length()); |
| 7001 | |
| 7002 | Load(args->at(0)); |
| 7003 | Load(args->at(1)); |
| 7004 | Load(args->at(2)); |
| 7005 | |
| 7006 | Result index2 = frame_->Pop(); |
| 7007 | index2.ToRegister(); |
| 7008 | |
| 7009 | Result index1 = frame_->Pop(); |
| 7010 | index1.ToRegister(); |
| 7011 | |
| 7012 | Result object = frame_->Pop(); |
| 7013 | object.ToRegister(); |
| 7014 | |
| 7015 | Result tmp1 = allocator()->Allocate(); |
| 7016 | tmp1.ToRegister(); |
| 7017 | Result tmp2 = allocator()->Allocate(); |
| 7018 | tmp2.ToRegister(); |
| 7019 | |
| 7020 | frame_->Spill(object.reg()); |
| 7021 | frame_->Spill(index1.reg()); |
| 7022 | frame_->Spill(index2.reg()); |
| 7023 | |
| 7024 | DeferredSwapElements* deferred = new DeferredSwapElements(object.reg(), |
| 7025 | index1.reg(), |
| 7026 | index2.reg()); |
| 7027 | |
| 7028 | // Fetch the map and check if array is in fast case. |
| 7029 | // Check that object doesn't require security checks and |
| 7030 | // has no indexed interceptor. |
| 7031 | __ CmpObjectType(object.reg(), FIRST_JS_OBJECT_TYPE, tmp1.reg()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 7032 | deferred->Branch(below); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 7033 | __ movzx_b(tmp1.reg(), FieldOperand(tmp1.reg(), Map::kBitFieldOffset)); |
| 7034 | __ test(tmp1.reg(), Immediate(KeyedLoadIC::kSlowCaseBitFieldMask)); |
| 7035 | deferred->Branch(not_zero); |
| 7036 | |
| 7037 | // Check the object's elements are in fast case. |
| 7038 | __ mov(tmp1.reg(), FieldOperand(object.reg(), JSObject::kElementsOffset)); |
| 7039 | __ cmp(FieldOperand(tmp1.reg(), HeapObject::kMapOffset), |
| 7040 | Immediate(Factory::fixed_array_map())); |
| 7041 | deferred->Branch(not_equal); |
| 7042 | |
| 7043 | // Smi-tagging is equivalent to multiplying by 2. |
| 7044 | STATIC_ASSERT(kSmiTag == 0); |
| 7045 | STATIC_ASSERT(kSmiTagSize == 1); |
| 7046 | |
| 7047 | // Check that both indices are smis. |
| 7048 | __ mov(tmp2.reg(), index1.reg()); |
| 7049 | __ or_(tmp2.reg(), Operand(index2.reg())); |
| 7050 | __ test(tmp2.reg(), Immediate(kSmiTagMask)); |
| 7051 | deferred->Branch(not_zero); |
| 7052 | |
| 7053 | // Bring addresses into index1 and index2. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 7054 | __ lea(index1.reg(), FixedArrayElementOperand(tmp1.reg(), index1.reg())); |
| 7055 | __ lea(index2.reg(), FixedArrayElementOperand(tmp1.reg(), index2.reg())); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 7056 | |
| 7057 | // Swap elements. |
| 7058 | __ mov(object.reg(), Operand(index1.reg(), 0)); |
| 7059 | __ mov(tmp2.reg(), Operand(index2.reg(), 0)); |
| 7060 | __ mov(Operand(index2.reg(), 0), object.reg()); |
| 7061 | __ mov(Operand(index1.reg(), 0), tmp2.reg()); |
| 7062 | |
| 7063 | Label done; |
| 7064 | __ InNewSpace(tmp1.reg(), tmp2.reg(), equal, &done); |
| 7065 | // Possible optimization: do a check that both values are Smis |
| 7066 | // (or them and test against Smi mask.) |
| 7067 | |
| 7068 | __ mov(tmp2.reg(), tmp1.reg()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 7069 | __ RecordWriteHelper(tmp2.reg(), index1.reg(), object.reg()); |
| 7070 | __ RecordWriteHelper(tmp1.reg(), index2.reg(), object.reg()); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 7071 | __ bind(&done); |
| 7072 | |
| 7073 | deferred->BindExit(); |
| 7074 | frame_->Push(Factory::undefined_value()); |
| 7075 | } |
| 7076 | |
| 7077 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7078 | void CodeGenerator::GenerateCallFunction(ZoneList<Expression*>* args) { |
| 7079 | Comment cmnt(masm_, "[ GenerateCallFunction"); |
| 7080 | |
| 7081 | ASSERT(args->length() >= 2); |
| 7082 | |
| 7083 | int n_args = args->length() - 2; // for receiver and function. |
| 7084 | Load(args->at(0)); // receiver |
| 7085 | for (int i = 0; i < n_args; i++) { |
| 7086 | Load(args->at(i + 1)); |
| 7087 | } |
| 7088 | Load(args->at(n_args + 1)); // function |
| 7089 | Result result = frame_->CallJSFunction(n_args); |
| 7090 | frame_->Push(&result); |
| 7091 | } |
| 7092 | |
| 7093 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 7094 | // Generates the Math.pow method. Only handles special cases and |
| 7095 | // branches to the runtime system for everything else. Please note |
| 7096 | // that this function assumes that the callsite has executed ToNumber |
| 7097 | // on both arguments. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7098 | void CodeGenerator::GenerateMathPow(ZoneList<Expression*>* args) { |
| 7099 | ASSERT(args->length() == 2); |
| 7100 | Load(args->at(0)); |
| 7101 | Load(args->at(1)); |
| 7102 | if (!CpuFeatures::IsSupported(SSE2)) { |
| 7103 | Result res = frame_->CallRuntime(Runtime::kMath_pow, 2); |
| 7104 | frame_->Push(&res); |
| 7105 | } else { |
| 7106 | CpuFeatures::Scope use_sse2(SSE2); |
| 7107 | Label allocate_return; |
| 7108 | // Load the two operands while leaving the values on the frame. |
| 7109 | frame()->Dup(); |
| 7110 | Result exponent = frame()->Pop(); |
| 7111 | exponent.ToRegister(); |
| 7112 | frame()->Spill(exponent.reg()); |
| 7113 | frame()->PushElementAt(1); |
| 7114 | Result base = frame()->Pop(); |
| 7115 | base.ToRegister(); |
| 7116 | frame()->Spill(base.reg()); |
| 7117 | |
| 7118 | Result answer = allocator()->Allocate(); |
| 7119 | ASSERT(answer.is_valid()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7120 | ASSERT(!exponent.reg().is(base.reg())); |
| 7121 | JumpTarget call_runtime; |
| 7122 | |
| 7123 | // Save 1 in xmm3 - we need this several times later on. |
| 7124 | __ mov(answer.reg(), Immediate(1)); |
| 7125 | __ cvtsi2sd(xmm3, Operand(answer.reg())); |
| 7126 | |
| 7127 | Label exponent_nonsmi; |
| 7128 | Label base_nonsmi; |
| 7129 | // If the exponent is a heap number go to that specific case. |
| 7130 | __ test(exponent.reg(), Immediate(kSmiTagMask)); |
| 7131 | __ j(not_zero, &exponent_nonsmi); |
| 7132 | __ test(base.reg(), Immediate(kSmiTagMask)); |
| 7133 | __ j(not_zero, &base_nonsmi); |
| 7134 | |
| 7135 | // Optimized version when y is an integer. |
| 7136 | Label powi; |
| 7137 | __ SmiUntag(base.reg()); |
| 7138 | __ cvtsi2sd(xmm0, Operand(base.reg())); |
| 7139 | __ jmp(&powi); |
| 7140 | // exponent is smi and base is a heapnumber. |
| 7141 | __ bind(&base_nonsmi); |
| 7142 | __ cmp(FieldOperand(base.reg(), HeapObject::kMapOffset), |
| 7143 | Factory::heap_number_map()); |
| 7144 | call_runtime.Branch(not_equal); |
| 7145 | |
| 7146 | __ movdbl(xmm0, FieldOperand(base.reg(), HeapNumber::kValueOffset)); |
| 7147 | |
| 7148 | // Optimized version of pow if y is an integer. |
| 7149 | __ bind(&powi); |
| 7150 | __ SmiUntag(exponent.reg()); |
| 7151 | |
| 7152 | // Save exponent in base as we need to check if exponent is negative later. |
| 7153 | // We know that base and exponent are in different registers. |
| 7154 | __ mov(base.reg(), exponent.reg()); |
| 7155 | |
| 7156 | // Get absolute value of exponent. |
| 7157 | Label no_neg; |
| 7158 | __ cmp(exponent.reg(), 0); |
| 7159 | __ j(greater_equal, &no_neg); |
| 7160 | __ neg(exponent.reg()); |
| 7161 | __ bind(&no_neg); |
| 7162 | |
| 7163 | // Load xmm1 with 1. |
| 7164 | __ movsd(xmm1, xmm3); |
| 7165 | Label while_true; |
| 7166 | Label no_multiply; |
| 7167 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7168 | __ bind(&while_true); |
| 7169 | __ shr(exponent.reg(), 1); |
| 7170 | __ j(not_carry, &no_multiply); |
| 7171 | __ mulsd(xmm1, xmm0); |
| 7172 | __ bind(&no_multiply); |
| 7173 | __ test(exponent.reg(), Operand(exponent.reg())); |
| 7174 | __ mulsd(xmm0, xmm0); |
| 7175 | __ j(not_zero, &while_true); |
| 7176 | |
| 7177 | // x has the original value of y - if y is negative return 1/result. |
| 7178 | __ test(base.reg(), Operand(base.reg())); |
| 7179 | __ j(positive, &allocate_return); |
| 7180 | // Special case if xmm1 has reached infinity. |
| 7181 | __ mov(answer.reg(), Immediate(0x7FB00000)); |
| 7182 | __ movd(xmm0, Operand(answer.reg())); |
| 7183 | __ cvtss2sd(xmm0, xmm0); |
| 7184 | __ ucomisd(xmm0, xmm1); |
| 7185 | call_runtime.Branch(equal); |
| 7186 | __ divsd(xmm3, xmm1); |
| 7187 | __ movsd(xmm1, xmm3); |
| 7188 | __ jmp(&allocate_return); |
| 7189 | |
| 7190 | // exponent (or both) is a heapnumber - no matter what we should now work |
| 7191 | // on doubles. |
| 7192 | __ bind(&exponent_nonsmi); |
| 7193 | __ cmp(FieldOperand(exponent.reg(), HeapObject::kMapOffset), |
| 7194 | Factory::heap_number_map()); |
| 7195 | call_runtime.Branch(not_equal); |
| 7196 | __ movdbl(xmm1, FieldOperand(exponent.reg(), HeapNumber::kValueOffset)); |
| 7197 | // Test if exponent is nan. |
| 7198 | __ ucomisd(xmm1, xmm1); |
| 7199 | call_runtime.Branch(parity_even); |
| 7200 | |
| 7201 | Label base_not_smi; |
| 7202 | Label handle_special_cases; |
| 7203 | __ test(base.reg(), Immediate(kSmiTagMask)); |
| 7204 | __ j(not_zero, &base_not_smi); |
| 7205 | __ SmiUntag(base.reg()); |
| 7206 | __ cvtsi2sd(xmm0, Operand(base.reg())); |
| 7207 | __ jmp(&handle_special_cases); |
| 7208 | __ bind(&base_not_smi); |
| 7209 | __ cmp(FieldOperand(base.reg(), HeapObject::kMapOffset), |
| 7210 | Factory::heap_number_map()); |
| 7211 | call_runtime.Branch(not_equal); |
| 7212 | __ mov(answer.reg(), FieldOperand(base.reg(), HeapNumber::kExponentOffset)); |
| 7213 | __ and_(answer.reg(), HeapNumber::kExponentMask); |
| 7214 | __ cmp(Operand(answer.reg()), Immediate(HeapNumber::kExponentMask)); |
| 7215 | // base is NaN or +/-Infinity |
| 7216 | call_runtime.Branch(greater_equal); |
| 7217 | __ movdbl(xmm0, FieldOperand(base.reg(), HeapNumber::kValueOffset)); |
| 7218 | |
| 7219 | // base is in xmm0 and exponent is in xmm1. |
| 7220 | __ bind(&handle_special_cases); |
| 7221 | Label not_minus_half; |
| 7222 | // Test for -0.5. |
| 7223 | // Load xmm2 with -0.5. |
| 7224 | __ mov(answer.reg(), Immediate(0xBF000000)); |
| 7225 | __ movd(xmm2, Operand(answer.reg())); |
| 7226 | __ cvtss2sd(xmm2, xmm2); |
| 7227 | // xmm2 now has -0.5. |
| 7228 | __ ucomisd(xmm2, xmm1); |
| 7229 | __ j(not_equal, ¬_minus_half); |
| 7230 | |
| 7231 | // Calculates reciprocal of square root. |
| 7232 | // Note that 1/sqrt(x) = sqrt(1/x)) |
| 7233 | __ divsd(xmm3, xmm0); |
| 7234 | __ movsd(xmm1, xmm3); |
| 7235 | __ sqrtsd(xmm1, xmm1); |
| 7236 | __ jmp(&allocate_return); |
| 7237 | |
| 7238 | // Test for 0.5. |
| 7239 | __ bind(¬_minus_half); |
| 7240 | // Load xmm2 with 0.5. |
| 7241 | // Since xmm3 is 1 and xmm2 is -0.5 this is simply xmm2 + xmm3. |
| 7242 | __ addsd(xmm2, xmm3); |
| 7243 | // xmm2 now has 0.5. |
| 7244 | __ comisd(xmm2, xmm1); |
| 7245 | call_runtime.Branch(not_equal); |
| 7246 | // Calculates square root. |
| 7247 | __ movsd(xmm1, xmm0); |
| 7248 | __ sqrtsd(xmm1, xmm1); |
| 7249 | |
| 7250 | JumpTarget done; |
| 7251 | Label failure, success; |
| 7252 | __ bind(&allocate_return); |
| 7253 | // Make a copy of the frame to enable us to handle allocation |
| 7254 | // failure after the JumpTarget jump. |
| 7255 | VirtualFrame* clone = new VirtualFrame(frame()); |
| 7256 | __ AllocateHeapNumber(answer.reg(), exponent.reg(), |
| 7257 | base.reg(), &failure); |
| 7258 | __ movdbl(FieldOperand(answer.reg(), HeapNumber::kValueOffset), xmm1); |
| 7259 | // Remove the two original values from the frame - we only need those |
| 7260 | // in the case where we branch to runtime. |
| 7261 | frame()->Drop(2); |
| 7262 | exponent.Unuse(); |
| 7263 | base.Unuse(); |
| 7264 | done.Jump(&answer); |
| 7265 | // Use the copy of the original frame as our current frame. |
| 7266 | RegisterFile empty_regs; |
| 7267 | SetFrame(clone, &empty_regs); |
| 7268 | // If we experience an allocation failure we branch to runtime. |
| 7269 | __ bind(&failure); |
| 7270 | call_runtime.Bind(); |
| 7271 | answer = frame()->CallRuntime(Runtime::kMath_pow_cfunction, 2); |
| 7272 | |
| 7273 | done.Bind(&answer); |
| 7274 | frame()->Push(&answer); |
| 7275 | } |
| 7276 | } |
| 7277 | |
| 7278 | |
| 7279 | void CodeGenerator::GenerateMathSin(ZoneList<Expression*>* args) { |
| 7280 | ASSERT_EQ(args->length(), 1); |
| 7281 | Load(args->at(0)); |
| 7282 | TranscendentalCacheStub stub(TranscendentalCache::SIN); |
| 7283 | Result result = frame_->CallStub(&stub, 1); |
| 7284 | frame_->Push(&result); |
| 7285 | } |
| 7286 | |
| 7287 | |
| 7288 | void CodeGenerator::GenerateMathCos(ZoneList<Expression*>* args) { |
| 7289 | ASSERT_EQ(args->length(), 1); |
| 7290 | Load(args->at(0)); |
| 7291 | TranscendentalCacheStub stub(TranscendentalCache::COS); |
| 7292 | Result result = frame_->CallStub(&stub, 1); |
| 7293 | frame_->Push(&result); |
| 7294 | } |
| 7295 | |
| 7296 | |
| 7297 | // Generates the Math.sqrt method. Please note - this function assumes that |
| 7298 | // the callsite has executed ToNumber on the argument. |
| 7299 | void CodeGenerator::GenerateMathSqrt(ZoneList<Expression*>* args) { |
| 7300 | ASSERT_EQ(args->length(), 1); |
| 7301 | Load(args->at(0)); |
| 7302 | |
| 7303 | if (!CpuFeatures::IsSupported(SSE2)) { |
| 7304 | Result result = frame()->CallRuntime(Runtime::kMath_sqrt, 1); |
| 7305 | frame()->Push(&result); |
| 7306 | } else { |
| 7307 | CpuFeatures::Scope use_sse2(SSE2); |
| 7308 | // Leave original value on the frame if we need to call runtime. |
| 7309 | frame()->Dup(); |
| 7310 | Result result = frame()->Pop(); |
| 7311 | result.ToRegister(); |
| 7312 | frame()->Spill(result.reg()); |
| 7313 | Label runtime; |
| 7314 | Label non_smi; |
| 7315 | Label load_done; |
| 7316 | JumpTarget end; |
| 7317 | |
| 7318 | __ test(result.reg(), Immediate(kSmiTagMask)); |
| 7319 | __ j(not_zero, &non_smi); |
| 7320 | __ SmiUntag(result.reg()); |
| 7321 | __ cvtsi2sd(xmm0, Operand(result.reg())); |
| 7322 | __ jmp(&load_done); |
| 7323 | __ bind(&non_smi); |
| 7324 | __ cmp(FieldOperand(result.reg(), HeapObject::kMapOffset), |
| 7325 | Factory::heap_number_map()); |
| 7326 | __ j(not_equal, &runtime); |
| 7327 | __ movdbl(xmm0, FieldOperand(result.reg(), HeapNumber::kValueOffset)); |
| 7328 | |
| 7329 | __ bind(&load_done); |
| 7330 | __ sqrtsd(xmm0, xmm0); |
| 7331 | // A copy of the virtual frame to allow us to go to runtime after the |
| 7332 | // JumpTarget jump. |
| 7333 | Result scratch = allocator()->Allocate(); |
| 7334 | VirtualFrame* clone = new VirtualFrame(frame()); |
| 7335 | __ AllocateHeapNumber(result.reg(), scratch.reg(), no_reg, &runtime); |
| 7336 | |
| 7337 | __ movdbl(FieldOperand(result.reg(), HeapNumber::kValueOffset), xmm0); |
| 7338 | frame()->Drop(1); |
| 7339 | scratch.Unuse(); |
| 7340 | end.Jump(&result); |
| 7341 | // We only branch to runtime if we have an allocation error. |
| 7342 | // Use the copy of the original frame as our current frame. |
| 7343 | RegisterFile empty_regs; |
| 7344 | SetFrame(clone, &empty_regs); |
| 7345 | __ bind(&runtime); |
| 7346 | result = frame()->CallRuntime(Runtime::kMath_sqrt, 1); |
| 7347 | |
| 7348 | end.Bind(&result); |
| 7349 | frame()->Push(&result); |
| 7350 | } |
| 7351 | } |
| 7352 | |
| 7353 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 7354 | void CodeGenerator::VisitCallRuntime(CallRuntime* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7355 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7356 | if (CheckForInlineRuntimeCall(node)) { |
| 7357 | return; |
| 7358 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7359 | |
| 7360 | ZoneList<Expression*>* args = node->arguments(); |
| 7361 | Comment cmnt(masm_, "[ CallRuntime"); |
| 7362 | Runtime::Function* function = node->function(); |
| 7363 | |
| 7364 | if (function == NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7365 | // Push the builtins object found in the current global object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7366 | Result temp = allocator()->Allocate(); |
| 7367 | ASSERT(temp.is_valid()); |
| 7368 | __ mov(temp.reg(), GlobalObject()); |
| 7369 | __ mov(temp.reg(), FieldOperand(temp.reg(), GlobalObject::kBuiltinsOffset)); |
| 7370 | frame_->Push(&temp); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7371 | } |
| 7372 | |
| 7373 | // Push the arguments ("left-to-right"). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7374 | int arg_count = args->length(); |
| 7375 | for (int i = 0; i < arg_count; i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7376 | Load(args->at(i)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7377 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7378 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7379 | if (function == NULL) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 7380 | // Call the JS runtime function. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 7381 | frame_->Push(node->name()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 7382 | Result answer = frame_->CallCallIC(RelocInfo::CODE_TARGET, |
| 7383 | arg_count, |
| 7384 | loop_nesting_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7385 | frame_->RestoreContextRegister(); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 7386 | frame_->Push(&answer); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7387 | } else { |
| 7388 | // Call the C runtime function. |
| 7389 | Result answer = frame_->CallRuntime(function, arg_count); |
| 7390 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7391 | } |
| 7392 | } |
| 7393 | |
| 7394 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 7395 | void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7396 | Comment cmnt(masm_, "[ UnaryOperation"); |
| 7397 | |
| 7398 | Token::Value op = node->op(); |
| 7399 | |
| 7400 | if (op == Token::NOT) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7401 | // Swap the true and false targets but keep the same actual label |
| 7402 | // as the fall through. |
| 7403 | destination()->Invert(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7404 | LoadCondition(node->expression(), destination(), true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7405 | // Swap the labels back. |
| 7406 | destination()->Invert(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7407 | |
| 7408 | } else if (op == Token::DELETE) { |
| 7409 | Property* property = node->expression()->AsProperty(); |
| 7410 | if (property != NULL) { |
| 7411 | Load(property->obj()); |
| 7412 | Load(property->key()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7413 | Result answer = frame_->InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION, 2); |
| 7414 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7415 | return; |
| 7416 | } |
| 7417 | |
| 7418 | Variable* variable = node->expression()->AsVariableProxy()->AsVariable(); |
| 7419 | if (variable != NULL) { |
| 7420 | Slot* slot = variable->slot(); |
| 7421 | if (variable->is_global()) { |
| 7422 | LoadGlobal(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7423 | frame_->Push(variable->name()); |
| 7424 | Result answer = frame_->InvokeBuiltin(Builtins::DELETE, |
| 7425 | CALL_FUNCTION, 2); |
| 7426 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7427 | return; |
| 7428 | |
| 7429 | } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 7430 | // Call the runtime to look up the context holding the named |
| 7431 | // variable. Sync the virtual frame eagerly so we can push the |
| 7432 | // arguments directly into place. |
| 7433 | frame_->SyncRange(0, frame_->element_count() - 1); |
| 7434 | frame_->EmitPush(esi); |
| 7435 | frame_->EmitPush(Immediate(variable->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7436 | Result context = frame_->CallRuntime(Runtime::kLookupContext, 2); |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 7437 | ASSERT(context.is_register()); |
| 7438 | frame_->EmitPush(context.reg()); |
| 7439 | context.Unuse(); |
| 7440 | frame_->EmitPush(Immediate(variable->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7441 | Result answer = frame_->InvokeBuiltin(Builtins::DELETE, |
| 7442 | CALL_FUNCTION, 2); |
| 7443 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7444 | return; |
| 7445 | } |
| 7446 | |
| 7447 | // Default: Result of deleting non-global, not dynamically |
| 7448 | // introduced variables is false. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7449 | frame_->Push(Factory::false_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7450 | |
| 7451 | } else { |
| 7452 | // Default: Result of deleting expressions is true. |
| 7453 | Load(node->expression()); // may have side-effects |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7454 | frame_->SetElementAt(0, Factory::true_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7455 | } |
| 7456 | |
| 7457 | } else if (op == Token::TYPEOF) { |
| 7458 | // Special case for loading the typeof expression; see comment on |
| 7459 | // LoadTypeofExpression(). |
| 7460 | LoadTypeofExpression(node->expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7461 | Result answer = frame_->CallRuntime(Runtime::kTypeof, 1); |
| 7462 | frame_->Push(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7463 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 7464 | } else if (op == Token::VOID) { |
| 7465 | Expression* expression = node->expression(); |
| 7466 | if (expression && expression->AsLiteral() && ( |
| 7467 | expression->AsLiteral()->IsTrue() || |
| 7468 | expression->AsLiteral()->IsFalse() || |
| 7469 | expression->AsLiteral()->handle()->IsNumber() || |
| 7470 | expression->AsLiteral()->handle()->IsString() || |
| 7471 | expression->AsLiteral()->handle()->IsJSRegExp() || |
| 7472 | expression->AsLiteral()->IsNull())) { |
| 7473 | // Omit evaluating the value of the primitive literal. |
| 7474 | // It will be discarded anyway, and can have no side effect. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7475 | frame_->Push(Factory::undefined_value()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 7476 | } else { |
| 7477 | Load(node->expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7478 | frame_->SetElementAt(0, Factory::undefined_value()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 7479 | } |
| 7480 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7481 | } else { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7482 | if (in_safe_int32_mode()) { |
| 7483 | Visit(node->expression()); |
| 7484 | Result value = frame_->Pop(); |
| 7485 | ASSERT(value.is_untagged_int32()); |
| 7486 | // Registers containing an int32 value are not multiply used. |
| 7487 | ASSERT(!value.is_register() || !frame_->is_used(value.reg())); |
| 7488 | value.ToRegister(); |
| 7489 | switch (op) { |
| 7490 | case Token::SUB: { |
| 7491 | __ neg(value.reg()); |
| 7492 | if (node->no_negative_zero()) { |
| 7493 | // -MIN_INT is MIN_INT with the overflow flag set. |
| 7494 | unsafe_bailout_->Branch(overflow); |
| 7495 | } else { |
| 7496 | // MIN_INT and 0 both have bad negations. They both have 31 zeros. |
| 7497 | __ test(value.reg(), Immediate(0x7FFFFFFF)); |
| 7498 | unsafe_bailout_->Branch(zero); |
| 7499 | } |
| 7500 | break; |
| 7501 | } |
| 7502 | case Token::BIT_NOT: { |
| 7503 | __ not_(value.reg()); |
| 7504 | break; |
| 7505 | } |
| 7506 | case Token::ADD: { |
| 7507 | // Unary plus has no effect on int32 values. |
| 7508 | break; |
| 7509 | } |
| 7510 | default: |
| 7511 | UNREACHABLE(); |
| 7512 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7513 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7514 | frame_->Push(&value); |
| 7515 | } else { |
| 7516 | Load(node->expression()); |
| 7517 | bool overwrite = |
| 7518 | (node->expression()->AsBinaryOperation() != NULL && |
| 7519 | node->expression()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| 7520 | switch (op) { |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7521 | case Token::NOT: |
| 7522 | case Token::DELETE: |
| 7523 | case Token::TYPEOF: |
| 7524 | UNREACHABLE(); // handled above |
| 7525 | break; |
| 7526 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7527 | case Token::SUB: { |
| 7528 | GenericUnaryOpStub stub(Token::SUB, overwrite); |
| 7529 | Result operand = frame_->Pop(); |
| 7530 | Result answer = frame_->CallStub(&stub, &operand); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7531 | answer.set_type_info(TypeInfo::Number()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7532 | frame_->Push(&answer); |
| 7533 | break; |
| 7534 | } |
| 7535 | case Token::BIT_NOT: { |
| 7536 | // Smi check. |
| 7537 | JumpTarget smi_label; |
| 7538 | JumpTarget continue_label; |
| 7539 | Result operand = frame_->Pop(); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7540 | TypeInfo operand_info = operand.type_info(); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7541 | operand.ToRegister(); |
| 7542 | if (operand_info.IsSmi()) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 7543 | if (FLAG_debug_code) __ AbortIfNotSmi(operand.reg()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7544 | frame_->Spill(operand.reg()); |
| 7545 | // Set smi tag bit. It will be reset by the not operation. |
| 7546 | __ lea(operand.reg(), Operand(operand.reg(), kSmiTagMask)); |
| 7547 | __ not_(operand.reg()); |
| 7548 | Result answer = operand; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7549 | answer.set_type_info(TypeInfo::Smi()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7550 | frame_->Push(&answer); |
| 7551 | } else { |
| 7552 | __ test(operand.reg(), Immediate(kSmiTagMask)); |
| 7553 | smi_label.Branch(zero, &operand, taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7554 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7555 | GenericUnaryOpStub stub(Token::BIT_NOT, overwrite); |
| 7556 | Result answer = frame_->CallStub(&stub, &operand); |
| 7557 | continue_label.Jump(&answer); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7558 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7559 | smi_label.Bind(&answer); |
| 7560 | answer.ToRegister(); |
| 7561 | frame_->Spill(answer.reg()); |
| 7562 | // Set smi tag bit. It will be reset by the not operation. |
| 7563 | __ lea(answer.reg(), Operand(answer.reg(), kSmiTagMask)); |
| 7564 | __ not_(answer.reg()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 7565 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7566 | continue_label.Bind(&answer); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7567 | answer.set_type_info(TypeInfo::Integer32()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7568 | frame_->Push(&answer); |
| 7569 | } |
| 7570 | break; |
| 7571 | } |
| 7572 | case Token::ADD: { |
| 7573 | // Smi check. |
| 7574 | JumpTarget continue_label; |
| 7575 | Result operand = frame_->Pop(); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7576 | TypeInfo operand_info = operand.type_info(); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7577 | operand.ToRegister(); |
| 7578 | __ test(operand.reg(), Immediate(kSmiTagMask)); |
| 7579 | continue_label.Branch(zero, &operand, taken); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 7580 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7581 | frame_->Push(&operand); |
| 7582 | Result answer = frame_->InvokeBuiltin(Builtins::TO_NUMBER, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7583 | CALL_FUNCTION, 1); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 7584 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7585 | continue_label.Bind(&answer); |
| 7586 | if (operand_info.IsSmi()) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7587 | answer.set_type_info(TypeInfo::Smi()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7588 | } else if (operand_info.IsInteger32()) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7589 | answer.set_type_info(TypeInfo::Integer32()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7590 | } else { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7591 | answer.set_type_info(TypeInfo::Number()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7592 | } |
| 7593 | frame_->Push(&answer); |
| 7594 | break; |
| 7595 | } |
| 7596 | default: |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7597 | UNREACHABLE(); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 7598 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7599 | } |
| 7600 | } |
| 7601 | } |
| 7602 | |
| 7603 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7604 | // The value in dst was optimistically incremented or decremented. The |
| 7605 | // result overflowed or was not smi tagged. Undo the operation, call |
| 7606 | // into the runtime to convert the argument to a number, and call the |
| 7607 | // specialized add or subtract stub. The result is left in dst. |
| 7608 | class DeferredPrefixCountOperation: public DeferredCode { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7609 | public: |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7610 | DeferredPrefixCountOperation(Register dst, |
| 7611 | bool is_increment, |
| 7612 | TypeInfo input_type) |
| 7613 | : dst_(dst), is_increment_(is_increment), input_type_(input_type) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7614 | set_comment("[ DeferredCountOperation"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7615 | } |
| 7616 | |
| 7617 | virtual void Generate(); |
| 7618 | |
| 7619 | private: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7620 | Register dst_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7621 | bool is_increment_; |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7622 | TypeInfo input_type_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7623 | }; |
| 7624 | |
| 7625 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7626 | void DeferredPrefixCountOperation::Generate() { |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7627 | // Undo the optimistic smi operation. |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7628 | if (is_increment_) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7629 | __ sub(Operand(dst_), Immediate(Smi::FromInt(1))); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7630 | } else { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7631 | __ add(Operand(dst_), Immediate(Smi::FromInt(1))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7632 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7633 | Register left; |
| 7634 | if (input_type_.IsNumber()) { |
| 7635 | left = dst_; |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7636 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7637 | __ push(dst_); |
| 7638 | __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_FUNCTION); |
| 7639 | left = eax; |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7640 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7641 | |
| 7642 | GenericBinaryOpStub stub(is_increment_ ? Token::ADD : Token::SUB, |
| 7643 | NO_OVERWRITE, |
| 7644 | NO_GENERIC_BINARY_FLAGS, |
| 7645 | TypeInfo::Number()); |
| 7646 | stub.GenerateCall(masm_, left, Smi::FromInt(1)); |
| 7647 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7648 | if (!dst_.is(eax)) __ mov(dst_, eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7649 | } |
| 7650 | |
| 7651 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7652 | // The value in dst was optimistically incremented or decremented. The |
| 7653 | // result overflowed or was not smi tagged. Undo the operation and call |
| 7654 | // into the runtime to convert the argument to a number. Update the |
| 7655 | // original value in old. Call the specialized add or subtract stub. |
| 7656 | // The result is left in dst. |
| 7657 | class DeferredPostfixCountOperation: public DeferredCode { |
| 7658 | public: |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7659 | DeferredPostfixCountOperation(Register dst, |
| 7660 | Register old, |
| 7661 | bool is_increment, |
| 7662 | TypeInfo input_type) |
| 7663 | : dst_(dst), |
| 7664 | old_(old), |
| 7665 | is_increment_(is_increment), |
| 7666 | input_type_(input_type) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7667 | set_comment("[ DeferredCountOperation"); |
| 7668 | } |
| 7669 | |
| 7670 | virtual void Generate(); |
| 7671 | |
| 7672 | private: |
| 7673 | Register dst_; |
| 7674 | Register old_; |
| 7675 | bool is_increment_; |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7676 | TypeInfo input_type_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7677 | }; |
| 7678 | |
| 7679 | |
| 7680 | void DeferredPostfixCountOperation::Generate() { |
| 7681 | // Undo the optimistic smi operation. |
| 7682 | if (is_increment_) { |
| 7683 | __ sub(Operand(dst_), Immediate(Smi::FromInt(1))); |
| 7684 | } else { |
| 7685 | __ add(Operand(dst_), Immediate(Smi::FromInt(1))); |
| 7686 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7687 | Register left; |
| 7688 | if (input_type_.IsNumber()) { |
| 7689 | __ push(dst_); // Save the input to use as the old value. |
| 7690 | left = dst_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7691 | } else { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7692 | __ push(dst_); |
| 7693 | __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_FUNCTION); |
| 7694 | __ push(eax); // Save the result of ToNumber to use as the old value. |
| 7695 | left = eax; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7696 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7697 | |
| 7698 | GenericBinaryOpStub stub(is_increment_ ? Token::ADD : Token::SUB, |
| 7699 | NO_OVERWRITE, |
| 7700 | NO_GENERIC_BINARY_FLAGS, |
| 7701 | TypeInfo::Number()); |
| 7702 | stub.GenerateCall(masm_, left, Smi::FromInt(1)); |
| 7703 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7704 | if (!dst_.is(eax)) __ mov(dst_, eax); |
| 7705 | __ pop(old_); |
| 7706 | } |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 7707 | |
| 7708 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 7709 | void CodeGenerator::VisitCountOperation(CountOperation* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7710 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7711 | Comment cmnt(masm_, "[ CountOperation"); |
| 7712 | |
| 7713 | bool is_postfix = node->is_postfix(); |
| 7714 | bool is_increment = node->op() == Token::INC; |
| 7715 | |
| 7716 | Variable* var = node->expression()->AsVariableProxy()->AsVariable(); |
| 7717 | bool is_const = (var != NULL && var->mode() == Variable::CONST); |
| 7718 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7719 | // Postfix operations need a stack slot under the reference to hold |
| 7720 | // the old value while the new value is being stored. This is so that |
| 7721 | // in the case that storing the new value requires a call, the old |
| 7722 | // value will be in the frame to be spilled. |
| 7723 | if (is_postfix) frame_->Push(Smi::FromInt(0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7724 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7725 | // A constant reference is not saved to, so a constant reference is not a |
| 7726 | // compound assignment reference. |
| 7727 | { Reference target(this, node->expression(), !is_const); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7728 | if (target.is_illegal()) { |
| 7729 | // Spoof the virtual frame to have the expected height (one higher |
| 7730 | // than on entry). |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7731 | if (!is_postfix) frame_->Push(Smi::FromInt(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7732 | return; |
| 7733 | } |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7734 | target.TakeValue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7735 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7736 | Result new_value = frame_->Pop(); |
| 7737 | new_value.ToRegister(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7738 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7739 | Result old_value; // Only allocated in the postfix case. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 7740 | if (is_postfix) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7741 | // Allocate a temporary to preserve the old value. |
| 7742 | old_value = allocator_->Allocate(); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 7743 | ASSERT(old_value.is_valid()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7744 | __ mov(old_value.reg(), new_value.reg()); |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 7745 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7746 | // The return value for postfix operations is ToNumber(input). |
| 7747 | // Keep more precise type info if the input is some kind of |
| 7748 | // number already. If the input is not a number we have to wait |
| 7749 | // for the deferred code to convert it. |
| 7750 | if (new_value.type_info().IsNumber()) { |
| 7751 | old_value.set_type_info(new_value.type_info()); |
| 7752 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 7753 | } |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 7754 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7755 | // Ensure the new value is writable. |
| 7756 | frame_->Spill(new_value.reg()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7757 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7758 | Result tmp; |
| 7759 | if (new_value.is_smi()) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 7760 | if (FLAG_debug_code) __ AbortIfNotSmi(new_value.reg()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7761 | } else { |
| 7762 | // We don't know statically if the input is a smi. |
| 7763 | // In order to combine the overflow and the smi tag check, we need |
| 7764 | // to be able to allocate a byte register. We attempt to do so |
| 7765 | // without spilling. If we fail, we will generate separate overflow |
| 7766 | // and smi tag checks. |
| 7767 | // We allocate and clear a temporary byte register before performing |
| 7768 | // the count operation since clearing the register using xor will clear |
| 7769 | // the overflow flag. |
| 7770 | tmp = allocator_->AllocateByteRegisterWithoutSpilling(); |
| 7771 | if (tmp.is_valid()) { |
| 7772 | __ Set(tmp.reg(), Immediate(0)); |
| 7773 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7774 | } |
| 7775 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7776 | if (is_increment) { |
| 7777 | __ add(Operand(new_value.reg()), Immediate(Smi::FromInt(1))); |
| 7778 | } else { |
| 7779 | __ sub(Operand(new_value.reg()), Immediate(Smi::FromInt(1))); |
| 7780 | } |
| 7781 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7782 | DeferredCode* deferred = NULL; |
| 7783 | if (is_postfix) { |
| 7784 | deferred = new DeferredPostfixCountOperation(new_value.reg(), |
| 7785 | old_value.reg(), |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7786 | is_increment, |
| 7787 | new_value.type_info()); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7788 | } else { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7789 | deferred = new DeferredPrefixCountOperation(new_value.reg(), |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7790 | is_increment, |
| 7791 | new_value.type_info()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7792 | } |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 7793 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7794 | if (new_value.is_smi()) { |
| 7795 | // In case we have a smi as input just check for overflow. |
| 7796 | deferred->Branch(overflow); |
| 7797 | } else { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 7798 | // If the count operation didn't overflow and the result is a valid |
| 7799 | // smi, we're done. Otherwise, we jump to the deferred slow-case |
| 7800 | // code. |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7801 | // We combine the overflow and the smi tag check if we could |
| 7802 | // successfully allocate a temporary byte register. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 7803 | if (tmp.is_valid()) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 7804 | __ setcc(overflow, tmp.reg()); |
| 7805 | __ or_(Operand(tmp.reg()), new_value.reg()); |
| 7806 | __ test(tmp.reg(), Immediate(kSmiTagMask)); |
| 7807 | tmp.Unuse(); |
| 7808 | deferred->Branch(not_zero); |
| 7809 | } else { |
| 7810 | // Otherwise we test separately for overflow and smi tag. |
| 7811 | deferred->Branch(overflow); |
| 7812 | __ test(new_value.reg(), Immediate(kSmiTagMask)); |
| 7813 | deferred->Branch(not_zero); |
| 7814 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 7815 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7816 | deferred->BindExit(); |
| 7817 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 7818 | // Postfix count operations return their input converted to |
| 7819 | // number. The case when the input is already a number is covered |
| 7820 | // above in the allocation code for old_value. |
| 7821 | if (is_postfix && !new_value.type_info().IsNumber()) { |
| 7822 | old_value.set_type_info(TypeInfo::Number()); |
| 7823 | } |
| 7824 | |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 7825 | // The result of ++ or -- is an Integer32 if the |
| 7826 | // input is a smi. Otherwise it is a number. |
| 7827 | if (new_value.is_smi()) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7828 | new_value.set_type_info(TypeInfo::Integer32()); |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 7829 | } else { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 7830 | new_value.set_type_info(TypeInfo::Number()); |
fschneider@chromium.org | 5a49b7a | 2010-03-18 10:06:01 +0000 | [diff] [blame] | 7831 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7832 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7833 | // Postfix: store the old value in the allocated slot under the |
| 7834 | // reference. |
| 7835 | if (is_postfix) frame_->SetElementAt(target.size(), &old_value); |
| 7836 | |
| 7837 | frame_->Push(&new_value); |
| 7838 | // Non-constant: update the reference. |
| 7839 | if (!is_const) target.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7840 | } |
| 7841 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 7842 | // Postfix: drop the new value and use the old. |
| 7843 | if (is_postfix) frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 7844 | } |
| 7845 | |
| 7846 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7847 | void CodeGenerator::Int32BinaryOperation(BinaryOperation* node) { |
| 7848 | Token::Value op = node->op(); |
| 7849 | Comment cmnt(masm_, "[ Int32BinaryOperation"); |
| 7850 | ASSERT(in_safe_int32_mode()); |
| 7851 | ASSERT(safe_int32_mode_enabled()); |
| 7852 | ASSERT(FLAG_safe_int32_compiler); |
| 7853 | |
| 7854 | if (op == Token::COMMA) { |
| 7855 | // Discard left value. |
| 7856 | frame_->Nip(1); |
| 7857 | return; |
| 7858 | } |
| 7859 | |
| 7860 | Result right = frame_->Pop(); |
| 7861 | Result left = frame_->Pop(); |
| 7862 | |
| 7863 | ASSERT(right.is_untagged_int32()); |
| 7864 | ASSERT(left.is_untagged_int32()); |
| 7865 | // Registers containing an int32 value are not multiply used. |
| 7866 | ASSERT(!left.is_register() || !frame_->is_used(left.reg())); |
| 7867 | ASSERT(!right.is_register() || !frame_->is_used(right.reg())); |
| 7868 | |
| 7869 | switch (op) { |
| 7870 | case Token::COMMA: |
| 7871 | case Token::OR: |
| 7872 | case Token::AND: |
| 7873 | UNREACHABLE(); |
| 7874 | break; |
| 7875 | case Token::BIT_OR: |
| 7876 | case Token::BIT_XOR: |
| 7877 | case Token::BIT_AND: |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7878 | if (left.is_constant() || right.is_constant()) { |
| 7879 | int32_t value; // Put constant in value, non-constant in left. |
| 7880 | // Constants are known to be int32 values, from static analysis, |
| 7881 | // or else will be converted to int32 by implicit ECMA [[ToInt32]]. |
| 7882 | if (left.is_constant()) { |
| 7883 | ASSERT(left.handle()->IsSmi() || left.handle()->IsHeapNumber()); |
| 7884 | value = NumberToInt32(*left.handle()); |
| 7885 | left = right; |
| 7886 | } else { |
| 7887 | ASSERT(right.handle()->IsSmi() || right.handle()->IsHeapNumber()); |
| 7888 | value = NumberToInt32(*right.handle()); |
| 7889 | } |
| 7890 | |
| 7891 | left.ToRegister(); |
| 7892 | if (op == Token::BIT_OR) { |
| 7893 | __ or_(Operand(left.reg()), Immediate(value)); |
| 7894 | } else if (op == Token::BIT_XOR) { |
| 7895 | __ xor_(Operand(left.reg()), Immediate(value)); |
| 7896 | } else { |
| 7897 | ASSERT(op == Token::BIT_AND); |
| 7898 | __ and_(Operand(left.reg()), Immediate(value)); |
| 7899 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7900 | } else { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7901 | ASSERT(left.is_register()); |
| 7902 | ASSERT(right.is_register()); |
| 7903 | if (op == Token::BIT_OR) { |
| 7904 | __ or_(left.reg(), Operand(right.reg())); |
| 7905 | } else if (op == Token::BIT_XOR) { |
| 7906 | __ xor_(left.reg(), Operand(right.reg())); |
| 7907 | } else { |
| 7908 | ASSERT(op == Token::BIT_AND); |
| 7909 | __ and_(left.reg(), Operand(right.reg())); |
| 7910 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7911 | } |
| 7912 | frame_->Push(&left); |
| 7913 | right.Unuse(); |
| 7914 | break; |
| 7915 | case Token::SAR: |
| 7916 | case Token::SHL: |
| 7917 | case Token::SHR: { |
| 7918 | bool test_shr_overflow = false; |
| 7919 | left.ToRegister(); |
| 7920 | if (right.is_constant()) { |
| 7921 | ASSERT(right.handle()->IsSmi() || right.handle()->IsHeapNumber()); |
| 7922 | int shift_amount = NumberToInt32(*right.handle()) & 0x1F; |
| 7923 | if (op == Token::SAR) { |
| 7924 | __ sar(left.reg(), shift_amount); |
| 7925 | } else if (op == Token::SHL) { |
| 7926 | __ shl(left.reg(), shift_amount); |
| 7927 | } else { |
| 7928 | ASSERT(op == Token::SHR); |
| 7929 | __ shr(left.reg(), shift_amount); |
| 7930 | if (shift_amount == 0) test_shr_overflow = true; |
| 7931 | } |
| 7932 | } else { |
| 7933 | // Move right to ecx |
| 7934 | if (left.is_register() && left.reg().is(ecx)) { |
| 7935 | right.ToRegister(); |
| 7936 | __ xchg(left.reg(), right.reg()); |
| 7937 | left = right; // Left is unused here, copy of right unused by Push. |
| 7938 | } else { |
| 7939 | right.ToRegister(ecx); |
| 7940 | left.ToRegister(); |
| 7941 | } |
| 7942 | if (op == Token::SAR) { |
| 7943 | __ sar_cl(left.reg()); |
| 7944 | } else if (op == Token::SHL) { |
| 7945 | __ shl_cl(left.reg()); |
| 7946 | } else { |
| 7947 | ASSERT(op == Token::SHR); |
| 7948 | __ shr_cl(left.reg()); |
| 7949 | test_shr_overflow = true; |
| 7950 | } |
| 7951 | } |
| 7952 | { |
| 7953 | Register left_reg = left.reg(); |
| 7954 | frame_->Push(&left); |
| 7955 | right.Unuse(); |
| 7956 | if (test_shr_overflow && !node->to_int32()) { |
| 7957 | // Uint32 results with top bit set are not Int32 values. |
| 7958 | // If they will be forced to Int32, skip the test. |
| 7959 | // Test is needed because shr with shift amount 0 does not set flags. |
| 7960 | __ test(left_reg, Operand(left_reg)); |
| 7961 | unsafe_bailout_->Branch(sign); |
| 7962 | } |
| 7963 | } |
| 7964 | break; |
| 7965 | } |
| 7966 | case Token::ADD: |
| 7967 | case Token::SUB: |
| 7968 | case Token::MUL: |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7969 | if ((left.is_constant() && op != Token::SUB) || right.is_constant()) { |
| 7970 | int32_t value; // Put constant in value, non-constant in left. |
| 7971 | if (right.is_constant()) { |
| 7972 | ASSERT(right.handle()->IsSmi() || right.handle()->IsHeapNumber()); |
| 7973 | value = NumberToInt32(*right.handle()); |
| 7974 | } else { |
| 7975 | ASSERT(left.handle()->IsSmi() || left.handle()->IsHeapNumber()); |
| 7976 | value = NumberToInt32(*left.handle()); |
| 7977 | left = right; |
| 7978 | } |
| 7979 | |
| 7980 | left.ToRegister(); |
| 7981 | if (op == Token::ADD) { |
| 7982 | __ add(Operand(left.reg()), Immediate(value)); |
| 7983 | } else if (op == Token::SUB) { |
| 7984 | __ sub(Operand(left.reg()), Immediate(value)); |
| 7985 | } else { |
| 7986 | ASSERT(op == Token::MUL); |
| 7987 | __ imul(left.reg(), left.reg(), value); |
| 7988 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7989 | } else { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7990 | left.ToRegister(); |
| 7991 | ASSERT(left.is_register()); |
| 7992 | ASSERT(right.is_register()); |
| 7993 | if (op == Token::ADD) { |
| 7994 | __ add(left.reg(), Operand(right.reg())); |
| 7995 | } else if (op == Token::SUB) { |
| 7996 | __ sub(left.reg(), Operand(right.reg())); |
| 7997 | } else { |
| 7998 | ASSERT(op == Token::MUL); |
| 7999 | // We have statically verified that a negative zero can be ignored. |
| 8000 | __ imul(left.reg(), Operand(right.reg())); |
| 8001 | } |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8002 | } |
| 8003 | right.Unuse(); |
| 8004 | frame_->Push(&left); |
| 8005 | if (!node->to_int32()) { |
| 8006 | // If ToInt32 is called on the result of ADD, SUB, or MUL, we don't |
| 8007 | // care about overflows. |
| 8008 | unsafe_bailout_->Branch(overflow); |
| 8009 | } |
| 8010 | break; |
| 8011 | case Token::DIV: |
| 8012 | case Token::MOD: { |
| 8013 | if (right.is_register() && (right.reg().is(eax) || right.reg().is(edx))) { |
| 8014 | if (left.is_register() && left.reg().is(edi)) { |
| 8015 | right.ToRegister(ebx); |
| 8016 | } else { |
| 8017 | right.ToRegister(edi); |
| 8018 | } |
| 8019 | } |
| 8020 | left.ToRegister(eax); |
| 8021 | Result edx_reg = allocator_->Allocate(edx); |
| 8022 | right.ToRegister(); |
| 8023 | // The results are unused here because BreakTarget::Branch cannot handle |
| 8024 | // live results. |
| 8025 | Register right_reg = right.reg(); |
| 8026 | left.Unuse(); |
| 8027 | right.Unuse(); |
| 8028 | edx_reg.Unuse(); |
| 8029 | __ cmp(right_reg, 0); |
| 8030 | // Ensure divisor is positive: no chance of non-int32 or -0 result. |
| 8031 | unsafe_bailout_->Branch(less_equal); |
| 8032 | __ cdq(); // Sign-extend eax into edx:eax |
| 8033 | __ idiv(right_reg); |
| 8034 | if (op == Token::MOD) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 8035 | // Negative zero can arise as a negative divident with a zero result. |
| 8036 | if (!node->no_negative_zero()) { |
| 8037 | Label not_negative_zero; |
| 8038 | __ test(edx, Operand(edx)); |
| 8039 | __ j(not_zero, ¬_negative_zero); |
| 8040 | __ test(eax, Operand(eax)); |
| 8041 | unsafe_bailout_->Branch(negative); |
| 8042 | __ bind(¬_negative_zero); |
| 8043 | } |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 8044 | Result edx_result(edx, TypeInfo::Integer32()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8045 | edx_result.set_untagged_int32(true); |
| 8046 | frame_->Push(&edx_result); |
| 8047 | } else { |
| 8048 | ASSERT(op == Token::DIV); |
| 8049 | __ test(edx, Operand(edx)); |
| 8050 | unsafe_bailout_->Branch(not_equal); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 8051 | Result eax_result(eax, TypeInfo::Integer32()); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8052 | eax_result.set_untagged_int32(true); |
| 8053 | frame_->Push(&eax_result); |
| 8054 | } |
| 8055 | break; |
| 8056 | } |
| 8057 | default: |
| 8058 | UNREACHABLE(); |
| 8059 | break; |
| 8060 | } |
| 8061 | } |
| 8062 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8063 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 8064 | void CodeGenerator::GenerateLogicalBooleanOperation(BinaryOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8065 | // According to ECMA-262 section 11.11, page 58, the binary logical |
| 8066 | // operators must yield the result of one of the two expressions |
| 8067 | // before any ToBoolean() conversions. This means that the value |
| 8068 | // produced by a && or || operator is not necessarily a boolean. |
| 8069 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8070 | // NOTE: If the left hand side produces a materialized value (not |
| 8071 | // control flow), we force the right hand side to do the same. This |
| 8072 | // is necessary because we assume that if we get control flow on the |
| 8073 | // last path out of an expression we got it on all paths. |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 8074 | if (node->op() == Token::AND) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8075 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 8076 | JumpTarget is_true; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8077 | ControlDestination dest(&is_true, destination()->false_target(), true); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8078 | LoadCondition(node->left(), &dest, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8079 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8080 | if (dest.false_was_fall_through()) { |
| 8081 | // The current false target was used as the fall-through. If |
| 8082 | // there are no dangling jumps to is_true then the left |
| 8083 | // subexpression was unconditionally false. Otherwise we have |
| 8084 | // paths where we do have to evaluate the right subexpression. |
| 8085 | if (is_true.is_linked()) { |
| 8086 | // We need to compile the right subexpression. If the jump to |
| 8087 | // the current false target was a forward jump then we have a |
| 8088 | // valid frame, we have just bound the false target, and we |
| 8089 | // have to jump around the code for the right subexpression. |
| 8090 | if (has_valid_frame()) { |
| 8091 | destination()->false_target()->Unuse(); |
| 8092 | destination()->false_target()->Jump(); |
| 8093 | } |
| 8094 | is_true.Bind(); |
| 8095 | // The left subexpression compiled to control flow, so the |
| 8096 | // right one is free to do so as well. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8097 | LoadCondition(node->right(), destination(), false); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8098 | } else { |
| 8099 | // We have actually just jumped to or bound the current false |
| 8100 | // target but the current control destination is not marked as |
| 8101 | // used. |
| 8102 | destination()->Use(false); |
| 8103 | } |
| 8104 | |
| 8105 | } else if (dest.is_used()) { |
| 8106 | // The left subexpression compiled to control flow (and is_true |
| 8107 | // was just bound), so the right is free to do so as well. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8108 | LoadCondition(node->right(), destination(), false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8109 | |
| 8110 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8111 | // We have a materialized value on the frame, so we exit with |
| 8112 | // one on all paths. There are possibly also jumps to is_true |
| 8113 | // from nested subexpressions. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 8114 | JumpTarget pop_and_continue; |
| 8115 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8116 | |
| 8117 | // Avoid popping the result if it converts to 'false' using the |
| 8118 | // standard ToBoolean() conversion as described in ECMA-262, |
| 8119 | // section 9.2, page 30. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8120 | // |
| 8121 | // Duplicate the TOS value. The duplicate will be popped by |
| 8122 | // ToBoolean. |
| 8123 | frame_->Dup(); |
| 8124 | ControlDestination dest(&pop_and_continue, &exit, true); |
| 8125 | ToBoolean(&dest); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8126 | |
| 8127 | // Pop the result of evaluating the first part. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8128 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8129 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8130 | // Compile right side expression. |
| 8131 | is_true.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8132 | Load(node->right()); |
| 8133 | |
| 8134 | // Exit (always with a materialized value). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8135 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8136 | } |
| 8137 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 8138 | } else { |
| 8139 | ASSERT(node->op() == Token::OR); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8140 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 8141 | JumpTarget is_false; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8142 | ControlDestination dest(destination()->true_target(), &is_false, false); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8143 | LoadCondition(node->left(), &dest, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8144 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8145 | if (dest.true_was_fall_through()) { |
| 8146 | // The current true target was used as the fall-through. If |
| 8147 | // there are no dangling jumps to is_false then the left |
| 8148 | // subexpression was unconditionally true. Otherwise we have |
| 8149 | // paths where we do have to evaluate the right subexpression. |
| 8150 | if (is_false.is_linked()) { |
| 8151 | // We need to compile the right subexpression. If the jump to |
| 8152 | // the current true target was a forward jump then we have a |
| 8153 | // valid frame, we have just bound the true target, and we |
| 8154 | // have to jump around the code for the right subexpression. |
| 8155 | if (has_valid_frame()) { |
| 8156 | destination()->true_target()->Unuse(); |
| 8157 | destination()->true_target()->Jump(); |
| 8158 | } |
| 8159 | is_false.Bind(); |
| 8160 | // The left subexpression compiled to control flow, so the |
| 8161 | // right one is free to do so as well. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8162 | LoadCondition(node->right(), destination(), false); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8163 | } else { |
| 8164 | // We have just jumped to or bound the current true target but |
| 8165 | // the current control destination is not marked as used. |
| 8166 | destination()->Use(true); |
| 8167 | } |
| 8168 | |
| 8169 | } else if (dest.is_used()) { |
| 8170 | // The left subexpression compiled to control flow (and is_false |
| 8171 | // was just bound), so the right is free to do so as well. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8172 | LoadCondition(node->right(), destination(), false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8173 | |
| 8174 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8175 | // We have a materialized value on the frame, so we exit with |
| 8176 | // one on all paths. There are possibly also jumps to is_false |
| 8177 | // from nested subexpressions. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 8178 | JumpTarget pop_and_continue; |
| 8179 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8180 | |
| 8181 | // Avoid popping the result if it converts to 'true' using the |
| 8182 | // standard ToBoolean() conversion as described in ECMA-262, |
| 8183 | // section 9.2, page 30. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8184 | // |
| 8185 | // Duplicate the TOS value. The duplicate will be popped by |
| 8186 | // ToBoolean. |
| 8187 | frame_->Dup(); |
| 8188 | ControlDestination dest(&exit, &pop_and_continue, false); |
| 8189 | ToBoolean(&dest); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8190 | |
| 8191 | // Pop the result of evaluating the first part. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8192 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8193 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8194 | // Compile right side expression. |
| 8195 | is_false.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8196 | Load(node->right()); |
| 8197 | |
| 8198 | // Exit (always with a materialized value). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8199 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8200 | } |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 8201 | } |
| 8202 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8203 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 8204 | |
| 8205 | void CodeGenerator::VisitBinaryOperation(BinaryOperation* node) { |
| 8206 | Comment cmnt(masm_, "[ BinaryOperation"); |
| 8207 | |
| 8208 | if (node->op() == Token::AND || node->op() == Token::OR) { |
| 8209 | GenerateLogicalBooleanOperation(node); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8210 | } else if (in_safe_int32_mode()) { |
| 8211 | Visit(node->left()); |
| 8212 | Visit(node->right()); |
| 8213 | Int32BinaryOperation(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8214 | } else { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 8215 | // NOTE: The code below assumes that the slow cases (calls to runtime) |
| 8216 | // never return a constant/immutable object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8217 | OverwriteMode overwrite_mode = NO_OVERWRITE; |
| 8218 | if (node->left()->AsBinaryOperation() != NULL && |
| 8219 | node->left()->AsBinaryOperation()->ResultOverwriteAllowed()) { |
| 8220 | overwrite_mode = OVERWRITE_LEFT; |
| 8221 | } else if (node->right()->AsBinaryOperation() != NULL && |
| 8222 | node->right()->AsBinaryOperation()->ResultOverwriteAllowed()) { |
| 8223 | overwrite_mode = OVERWRITE_RIGHT; |
| 8224 | } |
| 8225 | |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 8226 | if (node->left()->IsTrivial()) { |
| 8227 | Load(node->right()); |
| 8228 | Result right = frame_->Pop(); |
| 8229 | frame_->Push(node->left()); |
| 8230 | frame_->Push(&right); |
| 8231 | } else { |
| 8232 | Load(node->left()); |
| 8233 | Load(node->right()); |
| 8234 | } |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 8235 | GenericBinaryOperation(node, overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8236 | } |
| 8237 | } |
| 8238 | |
| 8239 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8240 | void CodeGenerator::VisitThisFunction(ThisFunction* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8241 | ASSERT(!in_safe_int32_mode()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8242 | frame_->PushFunction(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8243 | } |
| 8244 | |
| 8245 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8246 | void CodeGenerator::VisitCompareOperation(CompareOperation* node) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 8247 | ASSERT(!in_safe_int32_mode()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8248 | Comment cmnt(masm_, "[ CompareOperation"); |
| 8249 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 8250 | bool left_already_loaded = false; |
| 8251 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8252 | // Get the expressions from the node. |
| 8253 | Expression* left = node->left(); |
| 8254 | Expression* right = node->right(); |
| 8255 | Token::Value op = node->op(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 8256 | // To make typeof testing for natives implemented in JavaScript really |
| 8257 | // efficient, we generate special code for expressions of the form: |
| 8258 | // 'typeof <expression> == <string>'. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8259 | UnaryOperation* operation = left->AsUnaryOperation(); |
| 8260 | if ((op == Token::EQ || op == Token::EQ_STRICT) && |
| 8261 | (operation != NULL && operation->op() == Token::TYPEOF) && |
| 8262 | (right->AsLiteral() != NULL && |
| 8263 | right->AsLiteral()->handle()->IsString())) { |
| 8264 | Handle<String> check(String::cast(*right->AsLiteral()->handle())); |
| 8265 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8266 | // Load the operand and move it to a register. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8267 | LoadTypeofExpression(operation->expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8268 | Result answer = frame_->Pop(); |
| 8269 | answer.ToRegister(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8270 | |
| 8271 | if (check->Equals(Heap::number_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8272 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 8273 | destination()->true_target()->Branch(zero); |
| 8274 | frame_->Spill(answer.reg()); |
| 8275 | __ mov(answer.reg(), FieldOperand(answer.reg(), HeapObject::kMapOffset)); |
| 8276 | __ cmp(answer.reg(), Factory::heap_number_map()); |
| 8277 | answer.Unuse(); |
| 8278 | destination()->Split(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8279 | |
| 8280 | } else if (check->Equals(Heap::string_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8281 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 8282 | destination()->false_target()->Branch(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8283 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 8284 | // It can be an undetectable string object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8285 | Result temp = allocator()->Allocate(); |
| 8286 | ASSERT(temp.is_valid()); |
| 8287 | __ mov(temp.reg(), FieldOperand(answer.reg(), HeapObject::kMapOffset)); |
| 8288 | __ movzx_b(temp.reg(), FieldOperand(temp.reg(), Map::kBitFieldOffset)); |
| 8289 | __ test(temp.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 8290 | destination()->false_target()->Branch(not_zero); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8291 | __ CmpObjectType(answer.reg(), FIRST_NONSTRING_TYPE, temp.reg()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8292 | temp.Unuse(); |
| 8293 | answer.Unuse(); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8294 | destination()->Split(below); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8295 | |
| 8296 | } else if (check->Equals(Heap::boolean_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8297 | __ cmp(answer.reg(), Factory::true_value()); |
| 8298 | destination()->true_target()->Branch(equal); |
| 8299 | __ cmp(answer.reg(), Factory::false_value()); |
| 8300 | answer.Unuse(); |
| 8301 | destination()->Split(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8302 | |
| 8303 | } else if (check->Equals(Heap::undefined_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8304 | __ cmp(answer.reg(), Factory::undefined_value()); |
| 8305 | destination()->true_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8306 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8307 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 8308 | destination()->false_target()->Branch(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8309 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 8310 | // It can be an undetectable object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8311 | frame_->Spill(answer.reg()); |
| 8312 | __ mov(answer.reg(), FieldOperand(answer.reg(), HeapObject::kMapOffset)); |
| 8313 | __ movzx_b(answer.reg(), |
| 8314 | FieldOperand(answer.reg(), Map::kBitFieldOffset)); |
| 8315 | __ test(answer.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 8316 | answer.Unuse(); |
| 8317 | destination()->Split(not_zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8318 | |
| 8319 | } else if (check->Equals(Heap::function_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8320 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 8321 | destination()->false_target()->Branch(zero); |
| 8322 | frame_->Spill(answer.reg()); |
| 8323 | __ CmpObjectType(answer.reg(), JS_FUNCTION_TYPE, answer.reg()); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8324 | destination()->true_target()->Branch(equal); |
| 8325 | // Regular expressions are callable so typeof == 'function'. |
| 8326 | __ CmpInstanceType(answer.reg(), JS_REGEXP_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8327 | answer.Unuse(); |
| 8328 | destination()->Split(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8329 | } else if (check->Equals(Heap::object_symbol())) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8330 | __ test(answer.reg(), Immediate(kSmiTagMask)); |
| 8331 | destination()->false_target()->Branch(zero); |
| 8332 | __ cmp(answer.reg(), Factory::null_value()); |
| 8333 | destination()->true_target()->Branch(equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8334 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8335 | Result map = allocator()->Allocate(); |
| 8336 | ASSERT(map.is_valid()); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8337 | // Regular expressions are typeof == 'function', not 'object'. |
| 8338 | __ CmpObjectType(answer.reg(), JS_REGEXP_TYPE, map.reg()); |
| 8339 | destination()->false_target()->Branch(equal); |
| 8340 | |
| 8341 | // It can be an undetectable object. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8342 | __ movzx_b(map.reg(), FieldOperand(map.reg(), Map::kBitFieldOffset)); |
| 8343 | __ test(map.reg(), Immediate(1 << Map::kIsUndetectable)); |
| 8344 | destination()->false_target()->Branch(not_zero); |
| 8345 | __ mov(map.reg(), FieldOperand(answer.reg(), HeapObject::kMapOffset)); |
| 8346 | __ movzx_b(map.reg(), FieldOperand(map.reg(), Map::kInstanceTypeOffset)); |
| 8347 | __ cmp(map.reg(), FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 8348 | destination()->false_target()->Branch(below); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8349 | __ cmp(map.reg(), LAST_JS_OBJECT_TYPE); |
| 8350 | answer.Unuse(); |
| 8351 | map.Unuse(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 8352 | destination()->Split(below_equal); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8353 | } else { |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 8354 | // Uncommon case: typeof testing against a string literal that is |
| 8355 | // never returned from the typeof operator. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8356 | answer.Unuse(); |
| 8357 | destination()->Goto(false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8358 | } |
| 8359 | return; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 8360 | } else if (op == Token::LT && |
| 8361 | right->AsLiteral() != NULL && |
| 8362 | right->AsLiteral()->handle()->IsHeapNumber()) { |
| 8363 | Handle<HeapNumber> check(HeapNumber::cast(*right->AsLiteral()->handle())); |
| 8364 | if (check->value() == 2147483648.0) { // 0x80000000. |
| 8365 | Load(left); |
| 8366 | left_already_loaded = true; |
| 8367 | Result lhs = frame_->Pop(); |
| 8368 | lhs.ToRegister(); |
| 8369 | __ test(lhs.reg(), Immediate(kSmiTagMask)); |
| 8370 | destination()->true_target()->Branch(zero); // All Smis are less. |
| 8371 | Result scratch = allocator()->Allocate(); |
| 8372 | ASSERT(scratch.is_valid()); |
| 8373 | __ mov(scratch.reg(), FieldOperand(lhs.reg(), HeapObject::kMapOffset)); |
| 8374 | __ cmp(scratch.reg(), Factory::heap_number_map()); |
| 8375 | JumpTarget not_a_number; |
| 8376 | not_a_number.Branch(not_equal, &lhs); |
| 8377 | __ mov(scratch.reg(), |
| 8378 | FieldOperand(lhs.reg(), HeapNumber::kExponentOffset)); |
| 8379 | __ cmp(Operand(scratch.reg()), Immediate(0xfff00000)); |
| 8380 | not_a_number.Branch(above_equal, &lhs); // It's a negative NaN or -Inf. |
| 8381 | const uint32_t borderline_exponent = |
| 8382 | (HeapNumber::kExponentBias + 31) << HeapNumber::kExponentShift; |
| 8383 | __ cmp(Operand(scratch.reg()), Immediate(borderline_exponent)); |
| 8384 | scratch.Unuse(); |
| 8385 | lhs.Unuse(); |
| 8386 | destination()->true_target()->Branch(less); |
| 8387 | destination()->false_target()->Jump(); |
| 8388 | |
| 8389 | not_a_number.Bind(&lhs); |
| 8390 | frame_->Push(&lhs); |
| 8391 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8392 | } |
| 8393 | |
| 8394 | Condition cc = no_condition; |
| 8395 | bool strict = false; |
| 8396 | switch (op) { |
| 8397 | case Token::EQ_STRICT: |
| 8398 | strict = true; |
| 8399 | // Fall through |
| 8400 | case Token::EQ: |
| 8401 | cc = equal; |
| 8402 | break; |
| 8403 | case Token::LT: |
| 8404 | cc = less; |
| 8405 | break; |
| 8406 | case Token::GT: |
| 8407 | cc = greater; |
| 8408 | break; |
| 8409 | case Token::LTE: |
| 8410 | cc = less_equal; |
| 8411 | break; |
| 8412 | case Token::GTE: |
| 8413 | cc = greater_equal; |
| 8414 | break; |
| 8415 | case Token::IN: { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 8416 | if (!left_already_loaded) Load(left); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8417 | Load(right); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8418 | Result answer = frame_->InvokeBuiltin(Builtins::IN, CALL_FUNCTION, 2); |
| 8419 | frame_->Push(&answer); // push the result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8420 | return; |
| 8421 | } |
| 8422 | case Token::INSTANCEOF: { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 8423 | if (!left_already_loaded) Load(left); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8424 | Load(right); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8425 | InstanceofStub stub; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8426 | Result answer = frame_->CallStub(&stub, 2); |
| 8427 | answer.ToRegister(); |
| 8428 | __ test(answer.reg(), Operand(answer.reg())); |
| 8429 | answer.Unuse(); |
| 8430 | destination()->Split(zero); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8431 | return; |
| 8432 | } |
| 8433 | default: |
| 8434 | UNREACHABLE(); |
| 8435 | } |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 8436 | |
| 8437 | if (left->IsTrivial()) { |
| 8438 | if (!left_already_loaded) { |
| 8439 | Load(right); |
| 8440 | Result right_result = frame_->Pop(); |
| 8441 | frame_->Push(left); |
| 8442 | frame_->Push(&right_result); |
| 8443 | } else { |
| 8444 | Load(right); |
| 8445 | } |
| 8446 | } else { |
| 8447 | if (!left_already_loaded) Load(left); |
| 8448 | Load(right); |
| 8449 | } |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 8450 | Comparison(node, cc, strict, destination()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8451 | } |
| 8452 | |
| 8453 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8454 | #ifdef DEBUG |
| 8455 | bool CodeGenerator::HasValidEntryRegisters() { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 8456 | return (allocator()->count(eax) == (frame()->is_used(eax) ? 1 : 0)) |
| 8457 | && (allocator()->count(ebx) == (frame()->is_used(ebx) ? 1 : 0)) |
| 8458 | && (allocator()->count(ecx) == (frame()->is_used(ecx) ? 1 : 0)) |
| 8459 | && (allocator()->count(edx) == (frame()->is_used(edx) ? 1 : 0)) |
| 8460 | && (allocator()->count(edi) == (frame()->is_used(edi) ? 1 : 0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8461 | } |
| 8462 | #endif |
| 8463 | |
| 8464 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8465 | // Emit a LoadIC call to get the value from receiver and leave it in |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8466 | // dst. |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 8467 | class DeferredReferenceGetNamedValue: public DeferredCode { |
| 8468 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8469 | DeferredReferenceGetNamedValue(Register dst, |
| 8470 | Register receiver, |
| 8471 | Handle<String> name) |
| 8472 | : dst_(dst), receiver_(receiver), name_(name) { |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 8473 | set_comment("[ DeferredReferenceGetNamedValue"); |
| 8474 | } |
| 8475 | |
| 8476 | virtual void Generate(); |
| 8477 | |
| 8478 | Label* patch_site() { return &patch_site_; } |
| 8479 | |
| 8480 | private: |
| 8481 | Label patch_site_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8482 | Register dst_; |
| 8483 | Register receiver_; |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 8484 | Handle<String> name_; |
| 8485 | }; |
| 8486 | |
| 8487 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8488 | void DeferredReferenceGetNamedValue::Generate() { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8489 | if (!receiver_.is(eax)) { |
| 8490 | __ mov(eax, receiver_); |
| 8491 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8492 | __ Set(ecx, Immediate(name_)); |
| 8493 | Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| 8494 | __ call(ic, RelocInfo::CODE_TARGET); |
| 8495 | // The call must be followed by a test eax instruction to indicate |
| 8496 | // that the inobject property case was inlined. |
| 8497 | // |
| 8498 | // Store the delta to the map check instruction here in the test |
| 8499 | // instruction. Use masm_-> instead of the __ macro since the |
| 8500 | // latter can't return a value. |
| 8501 | int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(patch_site()); |
| 8502 | // Here we use masm_-> instead of the __ macro because this is the |
| 8503 | // instruction that gets patched and coverage code gets in the way. |
| 8504 | masm_->test(eax, Immediate(-delta_to_patch_site)); |
| 8505 | __ IncrementCounter(&Counters::named_load_inline_miss, 1); |
| 8506 | |
| 8507 | if (!dst_.is(eax)) __ mov(dst_, eax); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8508 | } |
| 8509 | |
| 8510 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 8511 | class DeferredReferenceGetKeyedValue: public DeferredCode { |
| 8512 | public: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8513 | explicit DeferredReferenceGetKeyedValue(Register dst, |
| 8514 | Register receiver, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8515 | Register key) |
| 8516 | : dst_(dst), receiver_(receiver), key_(key) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 8517 | set_comment("[ DeferredReferenceGetKeyedValue"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8518 | } |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 8519 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8520 | virtual void Generate(); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 8521 | |
| 8522 | Label* patch_site() { return &patch_site_; } |
| 8523 | |
| 8524 | private: |
| 8525 | Label patch_site_; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8526 | Register dst_; |
| 8527 | Register receiver_; |
| 8528 | Register key_; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 8529 | }; |
| 8530 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8531 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8532 | void DeferredReferenceGetKeyedValue::Generate() { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8533 | if (!receiver_.is(eax)) { |
| 8534 | // Register eax is available for key. |
| 8535 | if (!key_.is(eax)) { |
| 8536 | __ mov(eax, key_); |
| 8537 | } |
| 8538 | if (!receiver_.is(edx)) { |
| 8539 | __ mov(edx, receiver_); |
| 8540 | } |
| 8541 | } else if (!key_.is(edx)) { |
| 8542 | // Register edx is available for receiver. |
| 8543 | if (!receiver_.is(edx)) { |
| 8544 | __ mov(edx, receiver_); |
| 8545 | } |
| 8546 | if (!key_.is(eax)) { |
| 8547 | __ mov(eax, key_); |
| 8548 | } |
| 8549 | } else { |
| 8550 | __ xchg(edx, eax); |
| 8551 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8552 | // Calculate the delta from the IC call instruction to the map check |
| 8553 | // cmp instruction in the inlined version. This delta is stored in |
| 8554 | // a test(eax, delta) instruction after the call so that we can find |
| 8555 | // it in the IC initialization code and patch the cmp instruction. |
| 8556 | // This means that we cannot allow test instructions after calls to |
| 8557 | // KeyedLoadIC stubs in other places. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8558 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8559 | __ call(ic, RelocInfo::CODE_TARGET); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8560 | // The delta from the start of the map-compare instruction to the |
| 8561 | // test instruction. We use masm_-> directly here instead of the __ |
| 8562 | // macro because the macro sometimes uses macro expansion to turn |
| 8563 | // into something that can't return a value. This is encountered |
| 8564 | // when doing generated code coverage tests. |
| 8565 | int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(patch_site()); |
| 8566 | // Here we use masm_-> instead of the __ macro because this is the |
| 8567 | // instruction that gets patched and coverage code gets in the way. |
| 8568 | masm_->test(eax, Immediate(-delta_to_patch_site)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8569 | __ IncrementCounter(&Counters::keyed_load_inline_miss, 1); |
| 8570 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 8571 | if (!dst_.is(eax)) __ mov(dst_, eax); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8572 | } |
| 8573 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8574 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8575 | class DeferredReferenceSetKeyedValue: public DeferredCode { |
| 8576 | public: |
| 8577 | DeferredReferenceSetKeyedValue(Register value, |
| 8578 | Register key, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8579 | Register receiver, |
| 8580 | Register scratch) |
| 8581 | : value_(value), |
| 8582 | key_(key), |
| 8583 | receiver_(receiver), |
| 8584 | scratch_(scratch) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8585 | set_comment("[ DeferredReferenceSetKeyedValue"); |
| 8586 | } |
| 8587 | |
| 8588 | virtual void Generate(); |
| 8589 | |
| 8590 | Label* patch_site() { return &patch_site_; } |
| 8591 | |
| 8592 | private: |
| 8593 | Register value_; |
| 8594 | Register key_; |
| 8595 | Register receiver_; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8596 | Register scratch_; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8597 | Label patch_site_; |
| 8598 | }; |
| 8599 | |
| 8600 | |
| 8601 | void DeferredReferenceSetKeyedValue::Generate() { |
| 8602 | __ IncrementCounter(&Counters::keyed_store_inline_miss, 1); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8603 | // Move value_ to eax, key_ to ecx, and receiver_ to edx. |
| 8604 | Register old_value = value_; |
| 8605 | |
| 8606 | // First, move value to eax. |
| 8607 | if (!value_.is(eax)) { |
| 8608 | if (key_.is(eax)) { |
| 8609 | // Move key_ out of eax, preferably to ecx. |
| 8610 | if (!value_.is(ecx) && !receiver_.is(ecx)) { |
| 8611 | __ mov(ecx, key_); |
| 8612 | key_ = ecx; |
| 8613 | } else { |
| 8614 | __ mov(scratch_, key_); |
| 8615 | key_ = scratch_; |
| 8616 | } |
| 8617 | } |
| 8618 | if (receiver_.is(eax)) { |
| 8619 | // Move receiver_ out of eax, preferably to edx. |
| 8620 | if (!value_.is(edx) && !key_.is(edx)) { |
| 8621 | __ mov(edx, receiver_); |
| 8622 | receiver_ = edx; |
| 8623 | } else { |
| 8624 | // Both moves to scratch are from eax, also, no valid path hits both. |
| 8625 | __ mov(scratch_, receiver_); |
| 8626 | receiver_ = scratch_; |
| 8627 | } |
| 8628 | } |
| 8629 | __ mov(eax, value_); |
| 8630 | value_ = eax; |
| 8631 | } |
| 8632 | |
| 8633 | // Now value_ is in eax. Move the other two to the right positions. |
| 8634 | // We do not update the variables key_ and receiver_ to ecx and edx. |
| 8635 | if (key_.is(ecx)) { |
| 8636 | if (!receiver_.is(edx)) { |
| 8637 | __ mov(edx, receiver_); |
| 8638 | } |
| 8639 | } else if (key_.is(edx)) { |
| 8640 | if (receiver_.is(ecx)) { |
| 8641 | __ xchg(edx, ecx); |
| 8642 | } else { |
| 8643 | __ mov(ecx, key_); |
| 8644 | if (!receiver_.is(edx)) { |
| 8645 | __ mov(edx, receiver_); |
| 8646 | } |
| 8647 | } |
| 8648 | } else { // Key is not in edx or ecx. |
| 8649 | if (!receiver_.is(edx)) { |
| 8650 | __ mov(edx, receiver_); |
| 8651 | } |
| 8652 | __ mov(ecx, key_); |
| 8653 | } |
| 8654 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8655 | // Call the IC stub. |
| 8656 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| 8657 | __ call(ic, RelocInfo::CODE_TARGET); |
| 8658 | // The delta from the start of the map-compare instruction to the |
| 8659 | // test instruction. We use masm_-> directly here instead of the |
| 8660 | // __ macro because the macro sometimes uses macro expansion to turn |
| 8661 | // into something that can't return a value. This is encountered |
| 8662 | // when doing generated code coverage tests. |
| 8663 | int delta_to_patch_site = masm_->SizeOfCodeGeneratedSince(patch_site()); |
| 8664 | // Here we use masm_-> instead of the __ macro because this is the |
| 8665 | // instruction that gets patched and coverage code gets in the way. |
| 8666 | masm_->test(eax, Immediate(-delta_to_patch_site)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8667 | // Restore value (returned from store IC) register. |
| 8668 | if (!old_value.is(eax)) __ mov(old_value, eax); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8669 | } |
| 8670 | |
| 8671 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8672 | Result CodeGenerator::EmitNamedLoad(Handle<String> name, bool is_contextual) { |
| 8673 | #ifdef DEBUG |
| 8674 | int original_height = frame()->height(); |
| 8675 | #endif |
| 8676 | Result result; |
| 8677 | // Do not inline the inobject property case for loads from the global |
| 8678 | // object. Also do not inline for unoptimized code. This saves time in |
| 8679 | // the code generator. Unoptimized code is toplevel code or code that is |
| 8680 | // not in a loop. |
| 8681 | if (is_contextual || scope()->is_global_scope() || loop_nesting() == 0) { |
| 8682 | Comment cmnt(masm(), "[ Load from named Property"); |
| 8683 | frame()->Push(name); |
| 8684 | |
| 8685 | RelocInfo::Mode mode = is_contextual |
| 8686 | ? RelocInfo::CODE_TARGET_CONTEXT |
| 8687 | : RelocInfo::CODE_TARGET; |
| 8688 | result = frame()->CallLoadIC(mode); |
| 8689 | // A test eax instruction following the call signals that the inobject |
| 8690 | // property case was inlined. Ensure that there is not a test eax |
| 8691 | // instruction here. |
| 8692 | __ nop(); |
| 8693 | } else { |
| 8694 | // Inline the inobject property case. |
| 8695 | Comment cmnt(masm(), "[ Inlined named property load"); |
| 8696 | Result receiver = frame()->Pop(); |
| 8697 | receiver.ToRegister(); |
| 8698 | |
| 8699 | result = allocator()->Allocate(); |
| 8700 | ASSERT(result.is_valid()); |
| 8701 | DeferredReferenceGetNamedValue* deferred = |
| 8702 | new DeferredReferenceGetNamedValue(result.reg(), receiver.reg(), name); |
| 8703 | |
| 8704 | // Check that the receiver is a heap object. |
| 8705 | __ test(receiver.reg(), Immediate(kSmiTagMask)); |
| 8706 | deferred->Branch(zero); |
| 8707 | |
| 8708 | __ bind(deferred->patch_site()); |
| 8709 | // This is the map check instruction that will be patched (so we can't |
| 8710 | // use the double underscore macro that may insert instructions). |
| 8711 | // Initially use an invalid map to force a failure. |
| 8712 | masm()->cmp(FieldOperand(receiver.reg(), HeapObject::kMapOffset), |
| 8713 | Immediate(Factory::null_value())); |
| 8714 | // This branch is always a forwards branch so it's always a fixed size |
| 8715 | // which allows the assert below to succeed and patching to work. |
| 8716 | deferred->Branch(not_equal); |
| 8717 | |
| 8718 | // The delta from the patch label to the load offset must be statically |
| 8719 | // known. |
| 8720 | ASSERT(masm()->SizeOfCodeGeneratedSince(deferred->patch_site()) == |
| 8721 | LoadIC::kOffsetToLoadInstruction); |
| 8722 | // The initial (invalid) offset has to be large enough to force a 32-bit |
| 8723 | // instruction encoding to allow patching with an arbitrary offset. Use |
| 8724 | // kMaxInt (minus kHeapObjectTag). |
| 8725 | int offset = kMaxInt; |
| 8726 | masm()->mov(result.reg(), FieldOperand(receiver.reg(), offset)); |
| 8727 | |
| 8728 | __ IncrementCounter(&Counters::named_load_inline, 1); |
| 8729 | deferred->BindExit(); |
| 8730 | } |
| 8731 | ASSERT(frame()->height() == original_height - 1); |
| 8732 | return result; |
| 8733 | } |
| 8734 | |
| 8735 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8736 | Result CodeGenerator::EmitNamedStore(Handle<String> name, bool is_contextual) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8737 | #ifdef DEBUG |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8738 | int expected_height = frame()->height() - (is_contextual ? 1 : 2); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8739 | #endif |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8740 | Result result = frame()->CallStoreIC(name, is_contextual); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8741 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 8742 | ASSERT_EQ(expected_height, frame()->height()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8743 | return result; |
| 8744 | } |
| 8745 | |
| 8746 | |
| 8747 | Result CodeGenerator::EmitKeyedLoad() { |
| 8748 | #ifdef DEBUG |
| 8749 | int original_height = frame()->height(); |
| 8750 | #endif |
| 8751 | Result result; |
| 8752 | // Inline array load code if inside of a loop. We do not know the |
| 8753 | // receiver map yet, so we initially generate the code with a check |
| 8754 | // against an invalid map. In the inline cache code, we patch the map |
| 8755 | // check if appropriate. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8756 | if (loop_nesting() > 0) { |
| 8757 | Comment cmnt(masm_, "[ Inlined load from keyed Property"); |
| 8758 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8759 | // Use a fresh temporary to load the elements without destroying |
| 8760 | // the receiver which is needed for the deferred slow case. |
| 8761 | Result elements = allocator()->Allocate(); |
| 8762 | ASSERT(elements.is_valid()); |
| 8763 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 8764 | Result key = frame_->Pop(); |
| 8765 | Result receiver = frame_->Pop(); |
| 8766 | key.ToRegister(); |
| 8767 | receiver.ToRegister(); |
| 8768 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8769 | DeferredReferenceGetKeyedValue* deferred = |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8770 | new DeferredReferenceGetKeyedValue(elements.reg(), |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8771 | receiver.reg(), |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8772 | key.reg()); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8773 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8774 | __ test(receiver.reg(), Immediate(kSmiTagMask)); |
| 8775 | deferred->Branch(zero); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8776 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 8777 | // Check that the receiver has the expected map. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8778 | // Initially, use an invalid map. The map is patched in the IC |
| 8779 | // initialization code. |
| 8780 | __ bind(deferred->patch_site()); |
| 8781 | // Use masm-> here instead of the double underscore macro since extra |
| 8782 | // coverage code can interfere with the patching. |
| 8783 | masm_->cmp(FieldOperand(receiver.reg(), HeapObject::kMapOffset), |
| 8784 | Immediate(Factory::null_value())); |
| 8785 | deferred->Branch(not_equal); |
| 8786 | |
| 8787 | // Check that the key is a smi. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8788 | if (!key.is_smi()) { |
| 8789 | __ test(key.reg(), Immediate(kSmiTagMask)); |
| 8790 | deferred->Branch(not_zero); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 8791 | } else { |
| 8792 | if (FLAG_debug_code) __ AbortIfNotSmi(key.reg()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8793 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8794 | |
| 8795 | // Get the elements array from the receiver and check that it |
| 8796 | // is not a dictionary. |
| 8797 | __ mov(elements.reg(), |
| 8798 | FieldOperand(receiver.reg(), JSObject::kElementsOffset)); |
| 8799 | __ cmp(FieldOperand(elements.reg(), HeapObject::kMapOffset), |
| 8800 | Immediate(Factory::fixed_array_map())); |
| 8801 | deferred->Branch(not_equal); |
| 8802 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8803 | // Check that the key is within bounds. |
| 8804 | __ cmp(key.reg(), |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8805 | FieldOperand(elements.reg(), FixedArray::kLengthOffset)); |
| 8806 | deferred->Branch(above_equal); |
| 8807 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8808 | // Load and check that the result is not the hole. |
| 8809 | // Key holds a smi. |
| 8810 | ASSERT((kSmiTag == 0) && (kSmiTagSize == 1)); |
| 8811 | __ mov(elements.reg(), |
| 8812 | FieldOperand(elements.reg(), |
| 8813 | key.reg(), |
| 8814 | times_2, |
| 8815 | FixedArray::kHeaderSize)); |
| 8816 | result = elements; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8817 | __ cmp(Operand(result.reg()), Immediate(Factory::the_hole_value())); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8818 | deferred->Branch(equal); |
| 8819 | __ IncrementCounter(&Counters::keyed_load_inline, 1); |
| 8820 | |
| 8821 | deferred->BindExit(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8822 | } else { |
| 8823 | Comment cmnt(masm_, "[ Load from keyed Property"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8824 | result = frame_->CallKeyedLoadIC(RelocInfo::CODE_TARGET); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8825 | // Make sure that we do not have a test instruction after the |
| 8826 | // call. A test instruction after the call is used to |
| 8827 | // indicate that we have generated an inline version of the |
| 8828 | // keyed load. The explicit nop instruction is here because |
| 8829 | // the push that follows might be peep-hole optimized away. |
| 8830 | __ nop(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8831 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8832 | ASSERT(frame()->height() == original_height - 2); |
| 8833 | return result; |
| 8834 | } |
| 8835 | |
| 8836 | |
| 8837 | Result CodeGenerator::EmitKeyedStore(StaticType* key_type) { |
| 8838 | #ifdef DEBUG |
| 8839 | int original_height = frame()->height(); |
| 8840 | #endif |
| 8841 | Result result; |
| 8842 | // Generate inlined version of the keyed store if the code is in a loop |
| 8843 | // and the key is likely to be a smi. |
| 8844 | if (loop_nesting() > 0 && key_type->IsLikelySmi()) { |
| 8845 | Comment cmnt(masm(), "[ Inlined store to keyed Property"); |
| 8846 | |
| 8847 | // Get the receiver, key and value into registers. |
| 8848 | result = frame()->Pop(); |
| 8849 | Result key = frame()->Pop(); |
| 8850 | Result receiver = frame()->Pop(); |
| 8851 | |
| 8852 | Result tmp = allocator_->Allocate(); |
| 8853 | ASSERT(tmp.is_valid()); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 8854 | Result tmp2 = allocator_->Allocate(); |
| 8855 | ASSERT(tmp2.is_valid()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8856 | |
| 8857 | // Determine whether the value is a constant before putting it in a |
| 8858 | // register. |
| 8859 | bool value_is_constant = result.is_constant(); |
| 8860 | |
| 8861 | // Make sure that value, key and receiver are in registers. |
| 8862 | result.ToRegister(); |
| 8863 | key.ToRegister(); |
| 8864 | receiver.ToRegister(); |
| 8865 | |
| 8866 | DeferredReferenceSetKeyedValue* deferred = |
| 8867 | new DeferredReferenceSetKeyedValue(result.reg(), |
| 8868 | key.reg(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8869 | receiver.reg(), |
| 8870 | tmp.reg()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8871 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 8872 | // Check that the receiver is not a smi. |
| 8873 | __ test(receiver.reg(), Immediate(kSmiTagMask)); |
| 8874 | deferred->Branch(zero); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8875 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 8876 | // Check that the key is a smi. |
| 8877 | if (!key.is_smi()) { |
| 8878 | __ test(key.reg(), Immediate(kSmiTagMask)); |
| 8879 | deferred->Branch(not_zero); |
| 8880 | } else { |
| 8881 | if (FLAG_debug_code) __ AbortIfNotSmi(key.reg()); |
| 8882 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8883 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8884 | // Check that the receiver is a JSArray. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 8885 | __ CmpObjectType(receiver.reg(), JS_ARRAY_TYPE, tmp.reg()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8886 | deferred->Branch(not_equal); |
| 8887 | |
| 8888 | // Check that the key is within bounds. Both the key and the length of |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 8889 | // the JSArray are smis. Use unsigned comparison to handle negative keys. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8890 | __ cmp(key.reg(), |
| 8891 | FieldOperand(receiver.reg(), JSArray::kLengthOffset)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 8892 | deferred->Branch(above_equal); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8893 | |
| 8894 | // Get the elements array from the receiver and check that it is not a |
| 8895 | // dictionary. |
| 8896 | __ mov(tmp.reg(), |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 8897 | FieldOperand(receiver.reg(), JSArray::kElementsOffset)); |
| 8898 | |
| 8899 | // Check whether it is possible to omit the write barrier. If the elements |
| 8900 | // array is in new space or the value written is a smi we can safely update |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8901 | // the elements array without write barrier. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 8902 | Label in_new_space; |
| 8903 | __ InNewSpace(tmp.reg(), tmp2.reg(), equal, &in_new_space); |
| 8904 | if (!value_is_constant) { |
| 8905 | __ test(result.reg(), Immediate(kSmiTagMask)); |
| 8906 | deferred->Branch(not_zero); |
| 8907 | } |
| 8908 | |
| 8909 | __ bind(&in_new_space); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8910 | // Bind the deferred code patch site to be able to locate the fixed |
| 8911 | // array map comparison. When debugging, we patch this comparison to |
| 8912 | // always fail so that we will hit the IC call in the deferred code |
| 8913 | // which will allow the debugger to break for fast case stores. |
| 8914 | __ bind(deferred->patch_site()); |
| 8915 | __ cmp(FieldOperand(tmp.reg(), HeapObject::kMapOffset), |
| 8916 | Immediate(Factory::fixed_array_map())); |
| 8917 | deferred->Branch(not_equal); |
| 8918 | |
| 8919 | // Store the value. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 8920 | __ mov(FixedArrayElementOperand(tmp.reg(), key.reg()), result.reg()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8921 | __ IncrementCounter(&Counters::keyed_store_inline, 1); |
| 8922 | |
| 8923 | deferred->BindExit(); |
| 8924 | } else { |
| 8925 | result = frame()->CallKeyedStoreIC(); |
| 8926 | // Make sure that we do not have a test instruction after the |
| 8927 | // call. A test instruction after the call is used to |
| 8928 | // indicate that we have generated an inline version of the |
| 8929 | // keyed store. |
| 8930 | __ nop(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8931 | } |
| 8932 | ASSERT(frame()->height() == original_height - 3); |
| 8933 | return result; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8934 | } |
| 8935 | |
| 8936 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8937 | #undef __ |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8938 | #define __ ACCESS_MASM(masm) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8939 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8940 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8941 | static void CheckTwoForSminess(MacroAssembler* masm, |
| 8942 | Register left, Register right, Register scratch, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 8943 | TypeInfo left_info, TypeInfo right_info, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8944 | DeferredInlineBinaryOperation* deferred) { |
| 8945 | if (left.is(right)) { |
| 8946 | if (!left_info.IsSmi()) { |
| 8947 | __ test(left, Immediate(kSmiTagMask)); |
| 8948 | deferred->Branch(not_zero); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 8949 | } else { |
| 8950 | if (FLAG_debug_code) __ AbortIfNotSmi(left); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8951 | } |
| 8952 | } else if (!left_info.IsSmi()) { |
| 8953 | if (!right_info.IsSmi()) { |
| 8954 | __ mov(scratch, left); |
| 8955 | __ or_(scratch, Operand(right)); |
| 8956 | __ test(scratch, Immediate(kSmiTagMask)); |
| 8957 | deferred->Branch(not_zero); |
| 8958 | } else { |
| 8959 | __ test(left, Immediate(kSmiTagMask)); |
| 8960 | deferred->Branch(not_zero); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 8961 | if (FLAG_debug_code) __ AbortIfNotSmi(right); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8962 | } |
| 8963 | } else { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 8964 | if (FLAG_debug_code) __ AbortIfNotSmi(left); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8965 | if (!right_info.IsSmi()) { |
| 8966 | __ test(right, Immediate(kSmiTagMask)); |
| 8967 | deferred->Branch(not_zero); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 8968 | } else { |
| 8969 | if (FLAG_debug_code) __ AbortIfNotSmi(right); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8970 | } |
| 8971 | } |
| 8972 | } |
| 8973 | |
| 8974 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8975 | Handle<String> Reference::GetName() { |
| 8976 | ASSERT(type_ == NAMED); |
| 8977 | Property* property = expression_->AsProperty(); |
| 8978 | if (property == NULL) { |
| 8979 | // Global variable reference treated as a named property reference. |
| 8980 | VariableProxy* proxy = expression_->AsVariableProxy(); |
| 8981 | ASSERT(proxy->AsVariable() != NULL); |
| 8982 | ASSERT(proxy->AsVariable()->is_global()); |
| 8983 | return proxy->name(); |
| 8984 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8985 | Literal* raw_name = property->key()->AsLiteral(); |
| 8986 | ASSERT(raw_name != NULL); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8987 | return Handle<String>::cast(raw_name->handle()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 8988 | } |
| 8989 | } |
| 8990 | |
| 8991 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 8992 | void Reference::GetValue() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 8993 | ASSERT(!cgen_->in_spilled_code()); |
| 8994 | ASSERT(cgen_->HasValidEntryRegisters()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8995 | ASSERT(!is_illegal()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8996 | MacroAssembler* masm = cgen_->masm(); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 8997 | |
| 8998 | // Record the source position for the property load. |
| 8999 | Property* property = expression_->AsProperty(); |
| 9000 | if (property != NULL) { |
| 9001 | cgen_->CodeForSourcePosition(property->position()); |
| 9002 | } |
| 9003 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9004 | switch (type_) { |
| 9005 | case SLOT: { |
| 9006 | Comment cmnt(masm, "[ Load from Slot"); |
| 9007 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 9008 | ASSERT(slot != NULL); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 9009 | cgen_->LoadFromSlotCheckForArguments(slot, NOT_INSIDE_TYPEOF); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9010 | if (!persist_after_get_) set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9011 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9012 | } |
| 9013 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9014 | case NAMED: { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 9015 | Variable* var = expression_->AsVariableProxy()->AsVariable(); |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 9016 | bool is_global = var != NULL; |
| 9017 | ASSERT(!is_global || var->is_global()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9018 | if (persist_after_get_) cgen_->frame()->Dup(); |
| 9019 | Result result = cgen_->EmitNamedLoad(GetName(), is_global); |
| 9020 | if (!persist_after_get_) set_unloaded(); |
| 9021 | cgen_->frame()->Push(&result); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9022 | break; |
| 9023 | } |
| 9024 | |
| 9025 | case KEYED: { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9026 | if (persist_after_get_) { |
| 9027 | cgen_->frame()->PushElementAt(1); |
| 9028 | cgen_->frame()->PushElementAt(1); |
| 9029 | } |
| 9030 | Result value = cgen_->EmitKeyedLoad(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9031 | cgen_->frame()->Push(&value); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9032 | if (!persist_after_get_) set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9033 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9034 | } |
| 9035 | |
| 9036 | default: |
| 9037 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9038 | } |
| 9039 | } |
| 9040 | |
| 9041 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 9042 | void Reference::TakeValue() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9043 | // For non-constant frame-allocated slots, we invalidate the value in the |
| 9044 | // slot. For all others, we fall back on GetValue. |
| 9045 | ASSERT(!cgen_->in_spilled_code()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9046 | ASSERT(!is_illegal()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9047 | if (type_ != SLOT) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 9048 | GetValue(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9049 | return; |
| 9050 | } |
| 9051 | |
| 9052 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 9053 | ASSERT(slot != NULL); |
| 9054 | if (slot->type() == Slot::LOOKUP || |
| 9055 | slot->type() == Slot::CONTEXT || |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 9056 | slot->var()->mode() == Variable::CONST || |
| 9057 | slot->is_arguments()) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 9058 | GetValue(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9059 | return; |
| 9060 | } |
| 9061 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 9062 | // Only non-constant, frame-allocated parameters and locals can |
| 9063 | // reach here. Be careful not to use the optimizations for arguments |
| 9064 | // object access since it may not have been initialized yet. |
| 9065 | ASSERT(!slot->is_arguments()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9066 | if (slot->type() == Slot::PARAMETER) { |
| 9067 | cgen_->frame()->TakeParameterAt(slot->index()); |
| 9068 | } else { |
| 9069 | ASSERT(slot->type() == Slot::LOCAL); |
| 9070 | cgen_->frame()->TakeLocalAt(slot->index()); |
| 9071 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9072 | |
| 9073 | ASSERT(persist_after_get_); |
| 9074 | // Do not unload the reference, because it is used in SetValue. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9075 | } |
| 9076 | |
| 9077 | |
| 9078 | void Reference::SetValue(InitState init_state) { |
| 9079 | ASSERT(cgen_->HasValidEntryRegisters()); |
| 9080 | ASSERT(!is_illegal()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9081 | MacroAssembler* masm = cgen_->masm(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9082 | switch (type_) { |
| 9083 | case SLOT: { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9084 | Comment cmnt(masm, "[ Store to Slot"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9085 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 9086 | ASSERT(slot != NULL); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 9087 | cgen_->StoreToSlot(slot, init_state); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9088 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9089 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9090 | } |
| 9091 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9092 | case NAMED: { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9093 | Comment cmnt(masm, "[ Store to named Property"); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 9094 | Result answer = cgen_->EmitNamedStore(GetName(), false); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 9095 | cgen_->frame()->Push(&answer); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9096 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9097 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9098 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9099 | |
| 9100 | case KEYED: { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9101 | Comment cmnt(masm, "[ Store to keyed Property"); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9102 | Property* property = expression()->AsProperty(); |
| 9103 | ASSERT(property != NULL); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9104 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9105 | Result answer = cgen_->EmitKeyedStore(property->key()->type()); |
| 9106 | cgen_->frame()->Push(&answer); |
| 9107 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9108 | break; |
| 9109 | } |
| 9110 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9111 | case UNLOADED: |
| 9112 | case ILLEGAL: |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 9113 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9114 | } |
| 9115 | } |
| 9116 | |
| 9117 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9118 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 9119 | // Create a new closure from the given function info in new |
| 9120 | // space. Set the context to the current context in esi. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9121 | Label gc; |
| 9122 | __ AllocateInNewSpace(JSFunction::kSize, eax, ebx, ecx, &gc, TAG_OBJECT); |
| 9123 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 9124 | // Get the function info from the stack. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9125 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 9126 | |
| 9127 | // Compute the function map in the current global context and set that |
| 9128 | // as the map of the allocated object. |
| 9129 | __ mov(ecx, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 9130 | __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalContextOffset)); |
| 9131 | __ mov(ecx, Operand(ecx, Context::SlotOffset(Context::FUNCTION_MAP_INDEX))); |
| 9132 | __ mov(FieldOperand(eax, JSObject::kMapOffset), ecx); |
| 9133 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 9134 | // Initialize the rest of the function. We don't have to update the |
| 9135 | // write barrier because the allocated object is in new space. |
| 9136 | __ mov(ebx, Immediate(Factory::empty_fixed_array())); |
| 9137 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ebx); |
| 9138 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ebx); |
| 9139 | __ mov(FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset), |
| 9140 | Immediate(Factory::the_hole_value())); |
| 9141 | __ mov(FieldOperand(eax, JSFunction::kSharedFunctionInfoOffset), edx); |
| 9142 | __ mov(FieldOperand(eax, JSFunction::kContextOffset), esi); |
| 9143 | __ mov(FieldOperand(eax, JSFunction::kLiteralsOffset), ebx); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9144 | |
| 9145 | // Return and remove the on-stack parameter. |
| 9146 | __ ret(1 * kPointerSize); |
| 9147 | |
| 9148 | // Create a new closure through the slower runtime call. |
| 9149 | __ bind(&gc); |
| 9150 | __ pop(ecx); // Temporarily remove return address. |
| 9151 | __ pop(edx); |
| 9152 | __ push(esi); |
| 9153 | __ push(edx); |
| 9154 | __ push(ecx); // Restore return address. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9155 | __ TailCallRuntime(Runtime::kNewClosure, 2, 1); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9156 | } |
| 9157 | |
| 9158 | |
| 9159 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 9160 | // Try to allocate the context in new space. |
| 9161 | Label gc; |
| 9162 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 9163 | __ AllocateInNewSpace((length * kPointerSize) + FixedArray::kHeaderSize, |
| 9164 | eax, ebx, ecx, &gc, TAG_OBJECT); |
| 9165 | |
| 9166 | // Get the function from the stack. |
| 9167 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 9168 | |
| 9169 | // Setup the object header. |
| 9170 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), Factory::context_map()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9171 | __ mov(FieldOperand(eax, Context::kLengthOffset), |
| 9172 | Immediate(Smi::FromInt(length))); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9173 | |
| 9174 | // Setup the fixed slots. |
| 9175 | __ xor_(ebx, Operand(ebx)); // Set to NULL. |
| 9176 | __ mov(Operand(eax, Context::SlotOffset(Context::CLOSURE_INDEX)), ecx); |
| 9177 | __ mov(Operand(eax, Context::SlotOffset(Context::FCONTEXT_INDEX)), eax); |
| 9178 | __ mov(Operand(eax, Context::SlotOffset(Context::PREVIOUS_INDEX)), ebx); |
| 9179 | __ mov(Operand(eax, Context::SlotOffset(Context::EXTENSION_INDEX)), ebx); |
| 9180 | |
kasperl@chromium.org | 7b9eafd | 2009-12-21 15:20:30 +0000 | [diff] [blame] | 9181 | // Copy the global object from the surrounding context. We go through the |
| 9182 | // context in the function (ecx) to match the allocation behavior we have |
| 9183 | // in the runtime system (see Heap::AllocateFunctionContext). |
| 9184 | __ mov(ebx, FieldOperand(ecx, JSFunction::kContextOffset)); |
| 9185 | __ mov(ebx, Operand(ebx, Context::SlotOffset(Context::GLOBAL_INDEX))); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9186 | __ mov(Operand(eax, Context::SlotOffset(Context::GLOBAL_INDEX)), ebx); |
| 9187 | |
| 9188 | // Initialize the rest of the slots to undefined. |
| 9189 | __ mov(ebx, Factory::undefined_value()); |
| 9190 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 9191 | __ mov(Operand(eax, Context::SlotOffset(i)), ebx); |
| 9192 | } |
| 9193 | |
| 9194 | // Return and remove the on-stack parameter. |
| 9195 | __ mov(esi, Operand(eax)); |
| 9196 | __ ret(1 * kPointerSize); |
| 9197 | |
| 9198 | // Need to collect. Call into runtime system. |
| 9199 | __ bind(&gc); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9200 | __ TailCallRuntime(Runtime::kNewContext, 1, 1); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9201 | } |
| 9202 | |
| 9203 | |
| 9204 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9205 | // Stack layout on entry: |
| 9206 | // |
| 9207 | // [esp + kPointerSize]: constant elements. |
| 9208 | // [esp + (2 * kPointerSize)]: literal index. |
| 9209 | // [esp + (3 * kPointerSize)]: literals array. |
| 9210 | |
| 9211 | // All sizes here are multiples of kPointerSize. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9212 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 9213 | int size = JSArray::kSize + elements_size; |
| 9214 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9215 | // Load boilerplate object into ecx and check if we need to create a |
| 9216 | // boilerplate. |
| 9217 | Label slow_case; |
| 9218 | __ mov(ecx, Operand(esp, 3 * kPointerSize)); |
| 9219 | __ mov(eax, Operand(esp, 2 * kPointerSize)); |
| 9220 | ASSERT((kPointerSize == 4) && (kSmiTagSize == 1) && (kSmiTag == 0)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 9221 | __ mov(ecx, CodeGenerator::FixedArrayElementOperand(ecx, eax)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9222 | __ cmp(ecx, Factory::undefined_value()); |
| 9223 | __ j(equal, &slow_case); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9224 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9225 | // Allocate both the JS array and the elements array in one big |
| 9226 | // allocation. This avoids multiple limit checks. |
| 9227 | __ AllocateInNewSpace(size, eax, ebx, edx, &slow_case, TAG_OBJECT); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9228 | |
| 9229 | // Copy the JS array part. |
| 9230 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 9231 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 9232 | __ mov(ebx, FieldOperand(ecx, i)); |
| 9233 | __ mov(FieldOperand(eax, i), ebx); |
| 9234 | } |
| 9235 | } |
| 9236 | |
| 9237 | if (length_ > 0) { |
| 9238 | // Get hold of the elements array of the boilerplate and setup the |
| 9239 | // elements pointer in the resulting object. |
| 9240 | __ mov(ecx, FieldOperand(ecx, JSArray::kElementsOffset)); |
| 9241 | __ lea(edx, Operand(eax, JSArray::kSize)); |
| 9242 | __ mov(FieldOperand(eax, JSArray::kElementsOffset), edx); |
| 9243 | |
| 9244 | // Copy the elements array. |
| 9245 | for (int i = 0; i < elements_size; i += kPointerSize) { |
| 9246 | __ mov(ebx, FieldOperand(ecx, i)); |
| 9247 | __ mov(FieldOperand(edx, i), ebx); |
| 9248 | } |
| 9249 | } |
| 9250 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9251 | // Return and remove the on-stack parameters. |
| 9252 | __ ret(3 * kPointerSize); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9253 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9254 | __ bind(&slow_case); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9255 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 9256 | } |
| 9257 | |
| 9258 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9259 | // NOTE: The stub does not handle the inlined cases (Smis, Booleans, undefined). |
| 9260 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
| 9261 | Label false_result, true_result, not_string; |
| 9262 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 9263 | |
| 9264 | // 'null' => false. |
| 9265 | __ cmp(eax, Factory::null_value()); |
| 9266 | __ j(equal, &false_result); |
| 9267 | |
| 9268 | // Get the map and type of the heap object. |
| 9269 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 9270 | __ movzx_b(ecx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 9271 | |
| 9272 | // Undetectable => false. |
| 9273 | __ movzx_b(ebx, FieldOperand(edx, Map::kBitFieldOffset)); |
| 9274 | __ and_(ebx, 1 << Map::kIsUndetectable); |
| 9275 | __ j(not_zero, &false_result); |
| 9276 | |
| 9277 | // JavaScript object => true. |
| 9278 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 9279 | __ j(above_equal, &true_result); |
| 9280 | |
| 9281 | // String value => false iff empty. |
| 9282 | __ cmp(ecx, FIRST_NONSTRING_TYPE); |
| 9283 | __ j(above_equal, ¬_string); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9284 | __ mov(edx, FieldOperand(eax, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9285 | ASSERT(kSmiTag == 0); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 9286 | __ test(edx, Operand(edx)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9287 | __ j(zero, &false_result); |
| 9288 | __ jmp(&true_result); |
| 9289 | |
| 9290 | __ bind(¬_string); |
| 9291 | // HeapNumber => false iff +0, -0, or NaN. |
| 9292 | __ cmp(edx, Factory::heap_number_map()); |
| 9293 | __ j(not_equal, &true_result); |
| 9294 | __ fldz(); |
| 9295 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9296 | __ FCmp(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9297 | __ j(zero, &false_result); |
| 9298 | // Fall through to |true_result|. |
| 9299 | |
| 9300 | // Return 1/0 for true/false in eax. |
| 9301 | __ bind(&true_result); |
| 9302 | __ mov(eax, 1); |
| 9303 | __ ret(1 * kPointerSize); |
| 9304 | __ bind(&false_result); |
| 9305 | __ mov(eax, 0); |
| 9306 | __ ret(1 * kPointerSize); |
| 9307 | } |
| 9308 | |
| 9309 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9310 | void GenericBinaryOpStub::GenerateCall( |
| 9311 | MacroAssembler* masm, |
| 9312 | Register left, |
| 9313 | Register right) { |
| 9314 | if (!ArgsInRegistersSupported()) { |
sgjesse@chromium.org | 97c2831 | 2009-10-20 12:45:56 +0000 | [diff] [blame] | 9315 | // Pass arguments on the stack. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9316 | __ push(left); |
| 9317 | __ push(right); |
| 9318 | } else { |
| 9319 | // The calling convention with registers is left in edx and right in eax. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9320 | Register left_arg = edx; |
| 9321 | Register right_arg = eax; |
| 9322 | if (!(left.is(left_arg) && right.is(right_arg))) { |
| 9323 | if (left.is(right_arg) && right.is(left_arg)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9324 | if (IsOperationCommutative()) { |
| 9325 | SetArgsReversed(); |
| 9326 | } else { |
| 9327 | __ xchg(left, right); |
| 9328 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9329 | } else if (left.is(left_arg)) { |
| 9330 | __ mov(right_arg, right); |
ager@chromium.org | 951093b | 2010-02-11 12:59:04 +0000 | [diff] [blame] | 9331 | } else if (right.is(right_arg)) { |
| 9332 | __ mov(left_arg, left); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9333 | } else if (left.is(right_arg)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9334 | if (IsOperationCommutative()) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9335 | __ mov(left_arg, right); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9336 | SetArgsReversed(); |
| 9337 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9338 | // Order of moves important to avoid destroying left argument. |
| 9339 | __ mov(left_arg, left); |
| 9340 | __ mov(right_arg, right); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9341 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9342 | } else if (right.is(left_arg)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9343 | if (IsOperationCommutative()) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9344 | __ mov(right_arg, left); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9345 | SetArgsReversed(); |
| 9346 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9347 | // Order of moves important to avoid destroying right argument. |
| 9348 | __ mov(right_arg, right); |
| 9349 | __ mov(left_arg, left); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9350 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9351 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9352 | // Order of moves is not important. |
| 9353 | __ mov(left_arg, left); |
| 9354 | __ mov(right_arg, right); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9355 | } |
| 9356 | } |
| 9357 | |
| 9358 | // Update flags to indicate that arguments are in registers. |
| 9359 | SetArgsInRegisters(); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9360 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9361 | } |
| 9362 | |
| 9363 | // Call the stub. |
| 9364 | __ CallStub(this); |
| 9365 | } |
| 9366 | |
| 9367 | |
| 9368 | void GenericBinaryOpStub::GenerateCall( |
| 9369 | MacroAssembler* masm, |
| 9370 | Register left, |
| 9371 | Smi* right) { |
| 9372 | if (!ArgsInRegistersSupported()) { |
sgjesse@chromium.org | 97c2831 | 2009-10-20 12:45:56 +0000 | [diff] [blame] | 9373 | // Pass arguments on the stack. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9374 | __ push(left); |
| 9375 | __ push(Immediate(right)); |
| 9376 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9377 | // The calling convention with registers is left in edx and right in eax. |
| 9378 | Register left_arg = edx; |
| 9379 | Register right_arg = eax; |
| 9380 | if (left.is(left_arg)) { |
| 9381 | __ mov(right_arg, Immediate(right)); |
| 9382 | } else if (left.is(right_arg) && IsOperationCommutative()) { |
| 9383 | __ mov(left_arg, Immediate(right)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9384 | SetArgsReversed(); |
| 9385 | } else { |
ager@chromium.org | 951093b | 2010-02-11 12:59:04 +0000 | [diff] [blame] | 9386 | // For non-commutative operations, left and right_arg might be |
| 9387 | // the same register. Therefore, the order of the moves is |
| 9388 | // important here in order to not overwrite left before moving |
| 9389 | // it to left_arg. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9390 | __ mov(left_arg, left); |
| 9391 | __ mov(right_arg, Immediate(right)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9392 | } |
| 9393 | |
| 9394 | // Update flags to indicate that arguments are in registers. |
| 9395 | SetArgsInRegisters(); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9396 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9397 | } |
| 9398 | |
| 9399 | // Call the stub. |
| 9400 | __ CallStub(this); |
| 9401 | } |
| 9402 | |
| 9403 | |
| 9404 | void GenericBinaryOpStub::GenerateCall( |
| 9405 | MacroAssembler* masm, |
| 9406 | Smi* left, |
| 9407 | Register right) { |
sgjesse@chromium.org | 97c2831 | 2009-10-20 12:45:56 +0000 | [diff] [blame] | 9408 | if (!ArgsInRegistersSupported()) { |
| 9409 | // Pass arguments on the stack. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9410 | __ push(Immediate(left)); |
| 9411 | __ push(right); |
| 9412 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9413 | // The calling convention with registers is left in edx and right in eax. |
| 9414 | Register left_arg = edx; |
| 9415 | Register right_arg = eax; |
| 9416 | if (right.is(right_arg)) { |
| 9417 | __ mov(left_arg, Immediate(left)); |
| 9418 | } else if (right.is(left_arg) && IsOperationCommutative()) { |
| 9419 | __ mov(right_arg, Immediate(left)); |
| 9420 | SetArgsReversed(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9421 | } else { |
ager@chromium.org | 951093b | 2010-02-11 12:59:04 +0000 | [diff] [blame] | 9422 | // For non-commutative operations, right and left_arg might be |
| 9423 | // the same register. Therefore, the order of the moves is |
| 9424 | // important here in order to not overwrite right before moving |
| 9425 | // it to right_arg. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9426 | __ mov(right_arg, right); |
ager@chromium.org | 951093b | 2010-02-11 12:59:04 +0000 | [diff] [blame] | 9427 | __ mov(left_arg, Immediate(left)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9428 | } |
| 9429 | // Update flags to indicate that arguments are in registers. |
| 9430 | SetArgsInRegisters(); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9431 | __ IncrementCounter(&Counters::generic_binary_stub_calls_regs, 1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9432 | } |
| 9433 | |
| 9434 | // Call the stub. |
| 9435 | __ CallStub(this); |
| 9436 | } |
| 9437 | |
| 9438 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9439 | Result GenericBinaryOpStub::GenerateCall(MacroAssembler* masm, |
| 9440 | VirtualFrame* frame, |
| 9441 | Result* left, |
| 9442 | Result* right) { |
| 9443 | if (ArgsInRegistersSupported()) { |
| 9444 | SetArgsInRegisters(); |
| 9445 | return frame->CallStub(this, left, right); |
| 9446 | } else { |
| 9447 | frame->Push(left); |
| 9448 | frame->Push(right); |
| 9449 | return frame->CallStub(this, 2); |
| 9450 | } |
| 9451 | } |
| 9452 | |
| 9453 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9454 | void GenericBinaryOpStub::GenerateSmiCode(MacroAssembler* masm, Label* slow) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9455 | // 1. Move arguments into edx, eax except for DIV and MOD, which need the |
| 9456 | // dividend in eax and edx free for the division. Use eax, ebx for those. |
| 9457 | Comment load_comment(masm, "-- Load arguments"); |
| 9458 | Register left = edx; |
| 9459 | Register right = eax; |
| 9460 | if (op_ == Token::DIV || op_ == Token::MOD) { |
| 9461 | left = eax; |
| 9462 | right = ebx; |
| 9463 | if (HasArgsInRegisters()) { |
| 9464 | __ mov(ebx, eax); |
| 9465 | __ mov(eax, edx); |
| 9466 | } |
| 9467 | } |
| 9468 | if (!HasArgsInRegisters()) { |
| 9469 | __ mov(right, Operand(esp, 1 * kPointerSize)); |
| 9470 | __ mov(left, Operand(esp, 2 * kPointerSize)); |
| 9471 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9472 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9473 | if (static_operands_type_.IsSmi()) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 9474 | if (FLAG_debug_code) { |
| 9475 | __ AbortIfNotSmi(left); |
| 9476 | __ AbortIfNotSmi(right); |
| 9477 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9478 | if (op_ == Token::BIT_OR) { |
| 9479 | __ or_(right, Operand(left)); |
| 9480 | GenerateReturn(masm); |
| 9481 | return; |
| 9482 | } else if (op_ == Token::BIT_AND) { |
| 9483 | __ and_(right, Operand(left)); |
| 9484 | GenerateReturn(masm); |
| 9485 | return; |
| 9486 | } else if (op_ == Token::BIT_XOR) { |
| 9487 | __ xor_(right, Operand(left)); |
| 9488 | GenerateReturn(masm); |
| 9489 | return; |
| 9490 | } |
| 9491 | } |
| 9492 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9493 | // 2. Prepare the smi check of both operands by oring them together. |
| 9494 | Comment smi_check_comment(masm, "-- Smi check arguments"); |
| 9495 | Label not_smis; |
| 9496 | Register combined = ecx; |
| 9497 | ASSERT(!left.is(combined) && !right.is(combined)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9498 | switch (op_) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9499 | case Token::BIT_OR: |
| 9500 | // Perform the operation into eax and smi check the result. Preserve |
| 9501 | // eax in case the result is not a smi. |
| 9502 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 9503 | __ mov(ecx, right); |
| 9504 | __ or_(right, Operand(left)); // Bitwise or is commutative. |
| 9505 | combined = right; |
| 9506 | break; |
| 9507 | |
| 9508 | case Token::BIT_XOR: |
| 9509 | case Token::BIT_AND: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9510 | case Token::ADD: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9511 | case Token::SUB: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9512 | case Token::MUL: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9513 | case Token::DIV: |
| 9514 | case Token::MOD: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9515 | __ mov(combined, right); |
| 9516 | __ or_(combined, Operand(left)); |
| 9517 | break; |
| 9518 | |
| 9519 | case Token::SHL: |
| 9520 | case Token::SAR: |
| 9521 | case Token::SHR: |
| 9522 | // Move the right operand into ecx for the shift operation, use eax |
| 9523 | // for the smi check register. |
| 9524 | ASSERT(!left.is(ecx) && !right.is(ecx)); |
| 9525 | __ mov(ecx, right); |
| 9526 | __ or_(right, Operand(left)); |
| 9527 | combined = right; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9528 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9529 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9530 | default: |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9531 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9532 | } |
| 9533 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9534 | // 3. Perform the smi check of the operands. |
| 9535 | ASSERT(kSmiTag == 0); // Adjust zero check if not the case. |
| 9536 | __ test(combined, Immediate(kSmiTagMask)); |
| 9537 | __ j(not_zero, ¬_smis, not_taken); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9538 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9539 | // 4. Operands are both smis, perform the operation leaving the result in |
| 9540 | // eax and check the result if necessary. |
| 9541 | Comment perform_smi(masm, "-- Perform smi operation"); |
| 9542 | Label use_fp_on_smis; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9543 | switch (op_) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9544 | case Token::BIT_OR: |
| 9545 | // Nothing to do. |
| 9546 | break; |
| 9547 | |
| 9548 | case Token::BIT_XOR: |
| 9549 | ASSERT(right.is(eax)); |
| 9550 | __ xor_(right, Operand(left)); // Bitwise xor is commutative. |
| 9551 | break; |
| 9552 | |
| 9553 | case Token::BIT_AND: |
| 9554 | ASSERT(right.is(eax)); |
| 9555 | __ and_(right, Operand(left)); // Bitwise and is commutative. |
| 9556 | break; |
| 9557 | |
| 9558 | case Token::SHL: |
| 9559 | // Remove tags from operands (but keep sign). |
| 9560 | __ SmiUntag(left); |
| 9561 | __ SmiUntag(ecx); |
| 9562 | // Perform the operation. |
| 9563 | __ shl_cl(left); |
| 9564 | // Check that the *signed* result fits in a smi. |
| 9565 | __ cmp(left, 0xc0000000); |
| 9566 | __ j(sign, &use_fp_on_smis, not_taken); |
| 9567 | // Tag the result and store it in register eax. |
| 9568 | __ SmiTag(left); |
| 9569 | __ mov(eax, left); |
| 9570 | break; |
| 9571 | |
| 9572 | case Token::SAR: |
| 9573 | // Remove tags from operands (but keep sign). |
| 9574 | __ SmiUntag(left); |
| 9575 | __ SmiUntag(ecx); |
| 9576 | // Perform the operation. |
| 9577 | __ sar_cl(left); |
| 9578 | // Tag the result and store it in register eax. |
| 9579 | __ SmiTag(left); |
| 9580 | __ mov(eax, left); |
| 9581 | break; |
| 9582 | |
| 9583 | case Token::SHR: |
| 9584 | // Remove tags from operands (but keep sign). |
| 9585 | __ SmiUntag(left); |
| 9586 | __ SmiUntag(ecx); |
| 9587 | // Perform the operation. |
| 9588 | __ shr_cl(left); |
| 9589 | // Check that the *unsigned* result fits in a smi. |
| 9590 | // Neither of the two high-order bits can be set: |
| 9591 | // - 0x80000000: high bit would be lost when smi tagging. |
| 9592 | // - 0x40000000: this number would convert to negative when |
| 9593 | // Smi tagging these two cases can only happen with shifts |
| 9594 | // by 0 or 1 when handed a valid smi. |
| 9595 | __ test(left, Immediate(0xc0000000)); |
| 9596 | __ j(not_zero, slow, not_taken); |
| 9597 | // Tag the result and store it in register eax. |
| 9598 | __ SmiTag(left); |
| 9599 | __ mov(eax, left); |
| 9600 | break; |
| 9601 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9602 | case Token::ADD: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9603 | ASSERT(right.is(eax)); |
| 9604 | __ add(right, Operand(left)); // Addition is commutative. |
| 9605 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 9606 | break; |
| 9607 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9608 | case Token::SUB: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9609 | __ sub(left, Operand(right)); |
| 9610 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 9611 | __ mov(eax, left); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9612 | break; |
| 9613 | |
| 9614 | case Token::MUL: |
| 9615 | // If the smi tag is 0 we can just leave the tag on one operand. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9616 | ASSERT(kSmiTag == 0); // Adjust code below if not the case. |
| 9617 | // We can't revert the multiplication if the result is not a smi |
| 9618 | // so save the right operand. |
| 9619 | __ mov(ebx, right); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9620 | // Remove tag from one of the operands (but keep sign). |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9621 | __ SmiUntag(right); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9622 | // Do multiplication. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9623 | __ imul(right, Operand(left)); // Multiplication is commutative. |
| 9624 | __ j(overflow, &use_fp_on_smis, not_taken); |
| 9625 | // Check for negative zero result. Use combined = left | right. |
| 9626 | __ NegativeZeroTest(right, combined, &use_fp_on_smis); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9627 | break; |
| 9628 | |
| 9629 | case Token::DIV: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9630 | // We can't revert the division if the result is not a smi so |
| 9631 | // save the left operand. |
| 9632 | __ mov(edi, left); |
| 9633 | // Check for 0 divisor. |
| 9634 | __ test(right, Operand(right)); |
| 9635 | __ j(zero, &use_fp_on_smis, not_taken); |
| 9636 | // Sign extend left into edx:eax. |
| 9637 | ASSERT(left.is(eax)); |
| 9638 | __ cdq(); |
| 9639 | // Divide edx:eax by right. |
| 9640 | __ idiv(right); |
| 9641 | // Check for the corner case of dividing the most negative smi by |
| 9642 | // -1. We cannot use the overflow flag, since it is not set by idiv |
| 9643 | // instruction. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9644 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 9645 | __ cmp(eax, 0x40000000); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9646 | __ j(equal, &use_fp_on_smis); |
| 9647 | // Check for negative zero result. Use combined = left | right. |
| 9648 | __ NegativeZeroTest(eax, combined, &use_fp_on_smis); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9649 | // Check that the remainder is zero. |
| 9650 | __ test(edx, Operand(edx)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9651 | __ j(not_zero, &use_fp_on_smis); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9652 | // Tag the result and store it in register eax. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9653 | __ SmiTag(eax); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9654 | break; |
| 9655 | |
| 9656 | case Token::MOD: |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9657 | // Check for 0 divisor. |
| 9658 | __ test(right, Operand(right)); |
| 9659 | __ j(zero, ¬_smis, not_taken); |
| 9660 | |
| 9661 | // Sign extend left into edx:eax. |
| 9662 | ASSERT(left.is(eax)); |
| 9663 | __ cdq(); |
| 9664 | // Divide edx:eax by right. |
| 9665 | __ idiv(right); |
| 9666 | // Check for negative zero result. Use combined = left | right. |
| 9667 | __ NegativeZeroTest(edx, combined, slow); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9668 | // Move remainder to register eax. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9669 | __ mov(eax, edx); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9670 | break; |
| 9671 | |
| 9672 | default: |
| 9673 | UNREACHABLE(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9674 | } |
| 9675 | |
| 9676 | // 5. Emit return of result in eax. |
| 9677 | GenerateReturn(masm); |
| 9678 | |
| 9679 | // 6. For some operations emit inline code to perform floating point |
| 9680 | // operations on known smis (e.g., if the result of the operation |
| 9681 | // overflowed the smi range). |
| 9682 | switch (op_) { |
| 9683 | case Token::SHL: { |
| 9684 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 9685 | __ bind(&use_fp_on_smis); |
| 9686 | // Result we want is in left == edx, so we can put the allocated heap |
| 9687 | // number in eax. |
| 9688 | __ AllocateHeapNumber(eax, ecx, ebx, slow); |
| 9689 | // Store the result in the HeapNumber and return. |
| 9690 | if (CpuFeatures::IsSupported(SSE2)) { |
| 9691 | CpuFeatures::Scope use_sse2(SSE2); |
| 9692 | __ cvtsi2sd(xmm0, Operand(left)); |
| 9693 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 9694 | } else { |
| 9695 | // It's OK to overwrite the right argument on the stack because we |
| 9696 | // are about to return. |
| 9697 | __ mov(Operand(esp, 1 * kPointerSize), left); |
| 9698 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 9699 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 9700 | } |
| 9701 | GenerateReturn(masm); |
| 9702 | break; |
| 9703 | } |
| 9704 | |
| 9705 | case Token::ADD: |
| 9706 | case Token::SUB: |
| 9707 | case Token::MUL: |
| 9708 | case Token::DIV: { |
| 9709 | Comment perform_float(masm, "-- Perform float operation on smis"); |
| 9710 | __ bind(&use_fp_on_smis); |
| 9711 | // Restore arguments to edx, eax. |
| 9712 | switch (op_) { |
| 9713 | case Token::ADD: |
| 9714 | // Revert right = right + left. |
| 9715 | __ sub(right, Operand(left)); |
| 9716 | break; |
| 9717 | case Token::SUB: |
| 9718 | // Revert left = left - right. |
| 9719 | __ add(left, Operand(right)); |
| 9720 | break; |
| 9721 | case Token::MUL: |
| 9722 | // Right was clobbered but a copy is in ebx. |
| 9723 | __ mov(right, ebx); |
| 9724 | break; |
| 9725 | case Token::DIV: |
| 9726 | // Left was clobbered but a copy is in edi. Right is in ebx for |
| 9727 | // division. |
| 9728 | __ mov(edx, edi); |
| 9729 | __ mov(eax, right); |
| 9730 | break; |
| 9731 | default: UNREACHABLE(); |
| 9732 | break; |
| 9733 | } |
| 9734 | __ AllocateHeapNumber(ecx, ebx, no_reg, slow); |
| 9735 | if (CpuFeatures::IsSupported(SSE2)) { |
| 9736 | CpuFeatures::Scope use_sse2(SSE2); |
| 9737 | FloatingPointHelper::LoadSSE2Smis(masm, ebx); |
| 9738 | switch (op_) { |
| 9739 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 9740 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 9741 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 9742 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 9743 | default: UNREACHABLE(); |
| 9744 | } |
| 9745 | __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm0); |
| 9746 | } else { // SSE2 not available, use FPU. |
| 9747 | FloatingPointHelper::LoadFloatSmis(masm, ebx); |
| 9748 | switch (op_) { |
| 9749 | case Token::ADD: __ faddp(1); break; |
| 9750 | case Token::SUB: __ fsubp(1); break; |
| 9751 | case Token::MUL: __ fmulp(1); break; |
| 9752 | case Token::DIV: __ fdivp(1); break; |
| 9753 | default: UNREACHABLE(); |
| 9754 | } |
| 9755 | __ fstp_d(FieldOperand(ecx, HeapNumber::kValueOffset)); |
| 9756 | } |
| 9757 | __ mov(eax, ecx); |
| 9758 | GenerateReturn(masm); |
| 9759 | break; |
| 9760 | } |
| 9761 | |
| 9762 | default: |
| 9763 | break; |
| 9764 | } |
| 9765 | |
| 9766 | // 7. Non-smi operands, fall out to the non-smi code with the operands in |
| 9767 | // edx and eax. |
| 9768 | Comment done_comment(masm, "-- Enter non-smi code"); |
| 9769 | __ bind(¬_smis); |
| 9770 | switch (op_) { |
| 9771 | case Token::BIT_OR: |
| 9772 | case Token::SHL: |
| 9773 | case Token::SAR: |
| 9774 | case Token::SHR: |
| 9775 | // Right operand is saved in ecx and eax was destroyed by the smi |
| 9776 | // check. |
| 9777 | __ mov(eax, ecx); |
| 9778 | break; |
| 9779 | |
| 9780 | case Token::DIV: |
| 9781 | case Token::MOD: |
| 9782 | // Operands are in eax, ebx at this point. |
| 9783 | __ mov(edx, eax); |
| 9784 | __ mov(eax, ebx); |
| 9785 | break; |
| 9786 | |
| 9787 | default: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9788 | break; |
| 9789 | } |
| 9790 | } |
| 9791 | |
| 9792 | |
| 9793 | void GenericBinaryOpStub::Generate(MacroAssembler* masm) { |
| 9794 | Label call_runtime; |
| 9795 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9796 | __ IncrementCounter(&Counters::generic_binary_stub_calls, 1); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9797 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9798 | // Generate fast case smi code if requested. This flag is set when the fast |
| 9799 | // case smi code is not generated by the caller. Generating it here will speed |
| 9800 | // up common operations. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9801 | if (ShouldGenerateSmiCode()) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9802 | GenerateSmiCode(masm, &call_runtime); |
| 9803 | } else if (op_ != Token::MOD) { // MOD goes straight to runtime. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9804 | if (!HasArgsInRegisters()) { |
| 9805 | GenerateLoadArguments(masm); |
| 9806 | } |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9807 | } |
| 9808 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9809 | // Floating point case. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9810 | if (ShouldGenerateFPCode()) { |
| 9811 | switch (op_) { |
| 9812 | case Token::ADD: |
| 9813 | case Token::SUB: |
| 9814 | case Token::MUL: |
| 9815 | case Token::DIV: { |
| 9816 | if (runtime_operands_type_ == BinaryOpIC::DEFAULT && |
| 9817 | HasSmiCodeInStub()) { |
| 9818 | // Execution reaches this point when the first non-smi argument occurs |
| 9819 | // (and only if smi code is generated). This is the right moment to |
| 9820 | // patch to HEAP_NUMBERS state. The transition is attempted only for |
| 9821 | // the four basic operations. The stub stays in the DEFAULT state |
| 9822 | // forever for all other operations (also if smi code is skipped). |
| 9823 | GenerateTypeTransition(masm); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9824 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 9825 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9826 | Label not_floats; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9827 | if (CpuFeatures::IsSupported(SSE2)) { |
| 9828 | CpuFeatures::Scope use_sse2(SSE2); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9829 | if (static_operands_type_.IsNumber()) { |
| 9830 | if (FLAG_debug_code) { |
| 9831 | // Assert at runtime that inputs are only numbers. |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 9832 | __ AbortIfNotNumber(edx); |
| 9833 | __ AbortIfNotNumber(eax); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9834 | } |
| 9835 | if (static_operands_type_.IsSmi()) { |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 9836 | if (FLAG_debug_code) { |
| 9837 | __ AbortIfNotSmi(edx); |
| 9838 | __ AbortIfNotSmi(eax); |
| 9839 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9840 | FloatingPointHelper::LoadSSE2Smis(masm, ecx); |
| 9841 | } else { |
| 9842 | FloatingPointHelper::LoadSSE2Operands(masm); |
| 9843 | } |
| 9844 | } else { |
| 9845 | FloatingPointHelper::LoadSSE2Operands(masm, &call_runtime); |
| 9846 | } |
| 9847 | |
| 9848 | switch (op_) { |
| 9849 | case Token::ADD: __ addsd(xmm0, xmm1); break; |
| 9850 | case Token::SUB: __ subsd(xmm0, xmm1); break; |
| 9851 | case Token::MUL: __ mulsd(xmm0, xmm1); break; |
| 9852 | case Token::DIV: __ divsd(xmm0, xmm1); break; |
| 9853 | default: UNREACHABLE(); |
| 9854 | } |
| 9855 | GenerateHeapResultAllocation(masm, &call_runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9856 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9857 | GenerateReturn(masm); |
| 9858 | } else { // SSE2 not available, use FPU. |
| 9859 | if (static_operands_type_.IsNumber()) { |
| 9860 | if (FLAG_debug_code) { |
| 9861 | // Assert at runtime that inputs are only numbers. |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 9862 | __ AbortIfNotNumber(edx); |
| 9863 | __ AbortIfNotNumber(eax); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9864 | } |
| 9865 | } else { |
| 9866 | FloatingPointHelper::CheckFloatOperands(masm, &call_runtime, ebx); |
| 9867 | } |
| 9868 | FloatingPointHelper::LoadFloatOperands( |
| 9869 | masm, |
| 9870 | ecx, |
| 9871 | FloatingPointHelper::ARGS_IN_REGISTERS); |
| 9872 | switch (op_) { |
| 9873 | case Token::ADD: __ faddp(1); break; |
| 9874 | case Token::SUB: __ fsubp(1); break; |
| 9875 | case Token::MUL: __ fmulp(1); break; |
| 9876 | case Token::DIV: __ fdivp(1); break; |
| 9877 | default: UNREACHABLE(); |
| 9878 | } |
| 9879 | Label after_alloc_failure; |
| 9880 | GenerateHeapResultAllocation(masm, &after_alloc_failure); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9881 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9882 | GenerateReturn(masm); |
| 9883 | __ bind(&after_alloc_failure); |
| 9884 | __ ffree(); |
| 9885 | __ jmp(&call_runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9886 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9887 | __ bind(¬_floats); |
| 9888 | if (runtime_operands_type_ == BinaryOpIC::DEFAULT && |
| 9889 | !HasSmiCodeInStub()) { |
| 9890 | // Execution reaches this point when the first non-number argument |
| 9891 | // occurs (and only if smi code is skipped from the stub, otherwise |
| 9892 | // the patching has already been done earlier in this case branch). |
| 9893 | // Try patching to STRINGS for ADD operation. |
| 9894 | if (op_ == Token::ADD) { |
| 9895 | GenerateTypeTransition(masm); |
| 9896 | } |
| 9897 | } |
| 9898 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9899 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9900 | case Token::MOD: { |
| 9901 | // For MOD we go directly to runtime in the non-smi case. |
| 9902 | break; |
| 9903 | } |
| 9904 | case Token::BIT_OR: |
| 9905 | case Token::BIT_AND: |
| 9906 | case Token::BIT_XOR: |
| 9907 | case Token::SAR: |
| 9908 | case Token::SHL: |
| 9909 | case Token::SHR: { |
| 9910 | Label non_smi_result; |
| 9911 | FloatingPointHelper::LoadAsIntegers(masm, |
| 9912 | static_operands_type_, |
| 9913 | use_sse3_, |
| 9914 | &call_runtime); |
| 9915 | switch (op_) { |
| 9916 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 9917 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 9918 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 9919 | case Token::SAR: __ sar_cl(eax); break; |
| 9920 | case Token::SHL: __ shl_cl(eax); break; |
| 9921 | case Token::SHR: __ shr_cl(eax); break; |
| 9922 | default: UNREACHABLE(); |
| 9923 | } |
| 9924 | if (op_ == Token::SHR) { |
| 9925 | // Check if result is non-negative and fits in a smi. |
| 9926 | __ test(eax, Immediate(0xc0000000)); |
| 9927 | __ j(not_zero, &call_runtime); |
| 9928 | } else { |
| 9929 | // Check if result fits in a smi. |
| 9930 | __ cmp(eax, 0xc0000000); |
| 9931 | __ j(negative, &non_smi_result); |
| 9932 | } |
| 9933 | // Tag smi result and return. |
| 9934 | __ SmiTag(eax); |
| 9935 | GenerateReturn(masm); |
| 9936 | |
| 9937 | // All ops except SHR return a signed int32 that we load in |
| 9938 | // a HeapNumber. |
| 9939 | if (op_ != Token::SHR) { |
| 9940 | __ bind(&non_smi_result); |
| 9941 | // Allocate a heap number if needed. |
| 9942 | __ mov(ebx, Operand(eax)); // ebx: result |
| 9943 | Label skip_allocation; |
| 9944 | switch (mode_) { |
| 9945 | case OVERWRITE_LEFT: |
| 9946 | case OVERWRITE_RIGHT: |
| 9947 | // If the operand was an object, we skip the |
| 9948 | // allocation of a heap number. |
| 9949 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 9950 | 1 * kPointerSize : 2 * kPointerSize)); |
| 9951 | __ test(eax, Immediate(kSmiTagMask)); |
| 9952 | __ j(not_zero, &skip_allocation, not_taken); |
| 9953 | // Fall through! |
| 9954 | case NO_OVERWRITE: |
| 9955 | __ AllocateHeapNumber(eax, ecx, edx, &call_runtime); |
| 9956 | __ bind(&skip_allocation); |
| 9957 | break; |
| 9958 | default: UNREACHABLE(); |
| 9959 | } |
| 9960 | // Store the result in the HeapNumber and return. |
| 9961 | if (CpuFeatures::IsSupported(SSE2)) { |
| 9962 | CpuFeatures::Scope use_sse2(SSE2); |
| 9963 | __ cvtsi2sd(xmm0, Operand(ebx)); |
| 9964 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 9965 | } else { |
| 9966 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 9967 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 9968 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 9969 | } |
| 9970 | GenerateReturn(masm); |
| 9971 | } |
| 9972 | break; |
| 9973 | } |
| 9974 | default: UNREACHABLE(); break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9975 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9976 | } |
| 9977 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 9978 | // If all else fails, use the runtime system to get the correct |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9979 | // result. If arguments was passed in registers now place them on the |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 9980 | // stack in the correct order below the return address. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9981 | __ bind(&call_runtime); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9982 | if (HasArgsInRegisters()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9983 | GenerateRegisterArgsPush(masm); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 9984 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9985 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9986 | switch (op_) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 9987 | case Token::ADD: { |
| 9988 | // Test for string arguments before calling runtime. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9989 | Label not_strings, not_string1, string1, string1_smi2; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9990 | |
| 9991 | // If this stub has already generated FP-specific code then the arguments |
| 9992 | // are already in edx, eax |
| 9993 | if (!ShouldGenerateFPCode() && !HasArgsInRegisters()) { |
| 9994 | GenerateLoadArguments(masm); |
| 9995 | } |
| 9996 | |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 9997 | // Registers containing left and right operands respectively. |
| 9998 | Register lhs, rhs; |
| 9999 | if (HasArgsReversed()) { |
| 10000 | lhs = eax; |
| 10001 | rhs = edx; |
| 10002 | } else { |
| 10003 | lhs = edx; |
| 10004 | rhs = eax; |
| 10005 | } |
| 10006 | |
| 10007 | // Test if first argument is a string. |
| 10008 | __ test(lhs, Immediate(kSmiTagMask)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10009 | __ j(zero, ¬_string1); |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10010 | __ CmpObjectType(lhs, FIRST_NONSTRING_TYPE, ecx); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10011 | __ j(above_equal, ¬_string1); |
| 10012 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10013 | // First argument is a string, test second. |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10014 | __ test(rhs, Immediate(kSmiTagMask)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10015 | __ j(zero, &string1_smi2); |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10016 | __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10017 | __ j(above_equal, &string1); |
| 10018 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 10019 | // First and second argument are strings. Jump to the string add stub. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10020 | StringAddStub string_add_stub(NO_STRING_CHECK_IN_STUB); |
| 10021 | __ TailCallStub(&string_add_stub); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10022 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10023 | __ bind(&string1_smi2); |
| 10024 | // First argument is a string, second is a smi. Try to lookup the number |
| 10025 | // string for the smi in the number string cache. |
| 10026 | NumberToStringStub::GenerateLookupNumberStringCache( |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10027 | masm, rhs, edi, ebx, ecx, true, &string1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10028 | |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10029 | // Replace second argument on stack and tailcall string add stub to make |
| 10030 | // the result. |
| 10031 | __ mov(Operand(esp, 1 * kPointerSize), edi); |
| 10032 | __ TailCallStub(&string_add_stub); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10033 | |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10034 | // Only first argument is a string. |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10035 | __ bind(&string1); |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10036 | __ InvokeBuiltin(Builtins::STRING_ADD_LEFT, JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10037 | |
| 10038 | // First argument was not a string, test second. |
| 10039 | __ bind(¬_string1); |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10040 | __ test(rhs, Immediate(kSmiTagMask)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10041 | __ j(zero, ¬_strings); |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10042 | __ CmpObjectType(rhs, FIRST_NONSTRING_TYPE, ecx); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10043 | __ j(above_equal, ¬_strings); |
| 10044 | |
| 10045 | // Only second argument is a string. |
sgjesse@chromium.org | a24fdd5 | 2010-03-10 08:33:57 +0000 | [diff] [blame] | 10046 | __ InvokeBuiltin(Builtins::STRING_ADD_RIGHT, JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10047 | |
| 10048 | __ bind(¬_strings); |
| 10049 | // Neither argument is a string. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10050 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 10051 | break; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 10052 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10053 | case Token::SUB: |
| 10054 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 10055 | break; |
| 10056 | case Token::MUL: |
| 10057 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10058 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10059 | case Token::DIV: |
| 10060 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 10061 | break; |
| 10062 | case Token::MOD: |
| 10063 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 10064 | break; |
| 10065 | case Token::BIT_OR: |
| 10066 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 10067 | break; |
| 10068 | case Token::BIT_AND: |
| 10069 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 10070 | break; |
| 10071 | case Token::BIT_XOR: |
| 10072 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 10073 | break; |
| 10074 | case Token::SAR: |
| 10075 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 10076 | break; |
| 10077 | case Token::SHL: |
| 10078 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 10079 | break; |
| 10080 | case Token::SHR: |
| 10081 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 10082 | break; |
| 10083 | default: |
| 10084 | UNREACHABLE(); |
| 10085 | } |
| 10086 | } |
| 10087 | |
| 10088 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10089 | void GenericBinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm, |
| 10090 | Label* alloc_failure) { |
| 10091 | Label skip_allocation; |
| 10092 | OverwriteMode mode = mode_; |
| 10093 | if (HasArgsReversed()) { |
| 10094 | if (mode == OVERWRITE_RIGHT) { |
| 10095 | mode = OVERWRITE_LEFT; |
| 10096 | } else if (mode == OVERWRITE_LEFT) { |
| 10097 | mode = OVERWRITE_RIGHT; |
| 10098 | } |
| 10099 | } |
| 10100 | switch (mode) { |
| 10101 | case OVERWRITE_LEFT: { |
| 10102 | // If the argument in edx is already an object, we skip the |
| 10103 | // allocation of a heap number. |
| 10104 | __ test(edx, Immediate(kSmiTagMask)); |
| 10105 | __ j(not_zero, &skip_allocation, not_taken); |
| 10106 | // Allocate a heap number for the result. Keep eax and edx intact |
| 10107 | // for the possible runtime call. |
| 10108 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 10109 | // Now edx can be overwritten losing one of the arguments as we are |
| 10110 | // now done and will not need it any more. |
| 10111 | __ mov(edx, Operand(ebx)); |
| 10112 | __ bind(&skip_allocation); |
| 10113 | // Use object in edx as a result holder |
| 10114 | __ mov(eax, Operand(edx)); |
| 10115 | break; |
| 10116 | } |
| 10117 | case OVERWRITE_RIGHT: |
| 10118 | // If the argument in eax is already an object, we skip the |
| 10119 | // allocation of a heap number. |
| 10120 | __ test(eax, Immediate(kSmiTagMask)); |
| 10121 | __ j(not_zero, &skip_allocation, not_taken); |
| 10122 | // Fall through! |
| 10123 | case NO_OVERWRITE: |
| 10124 | // Allocate a heap number for the result. Keep eax and edx intact |
| 10125 | // for the possible runtime call. |
| 10126 | __ AllocateHeapNumber(ebx, ecx, no_reg, alloc_failure); |
| 10127 | // Now eax can be overwritten losing one of the arguments as we are |
| 10128 | // now done and will not need it any more. |
| 10129 | __ mov(eax, ebx); |
| 10130 | __ bind(&skip_allocation); |
| 10131 | break; |
| 10132 | default: UNREACHABLE(); |
| 10133 | } |
| 10134 | } |
| 10135 | |
| 10136 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 10137 | void GenericBinaryOpStub::GenerateLoadArguments(MacroAssembler* masm) { |
| 10138 | // If arguments are not passed in registers read them from the stack. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10139 | ASSERT(!HasArgsInRegisters()); |
| 10140 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 10141 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 10142 | } |
| 10143 | |
| 10144 | |
| 10145 | void GenericBinaryOpStub::GenerateReturn(MacroAssembler* masm) { |
| 10146 | // If arguments are not passed in registers remove them from the stack before |
| 10147 | // returning. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10148 | if (!HasArgsInRegisters()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 10149 | __ ret(2 * kPointerSize); // Remove both operands |
| 10150 | } else { |
| 10151 | __ ret(0); |
| 10152 | } |
| 10153 | } |
| 10154 | |
| 10155 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10156 | void GenericBinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
| 10157 | ASSERT(HasArgsInRegisters()); |
| 10158 | __ pop(ecx); |
| 10159 | if (HasArgsReversed()) { |
| 10160 | __ push(eax); |
| 10161 | __ push(edx); |
| 10162 | } else { |
| 10163 | __ push(edx); |
| 10164 | __ push(eax); |
| 10165 | } |
| 10166 | __ push(ecx); |
| 10167 | } |
| 10168 | |
| 10169 | |
| 10170 | void GenericBinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 10171 | Label get_result; |
| 10172 | |
| 10173 | // Keep a copy of operands on the stack and make sure they are also in |
| 10174 | // edx, eax. |
| 10175 | if (HasArgsInRegisters()) { |
| 10176 | GenerateRegisterArgsPush(masm); |
| 10177 | } else { |
| 10178 | GenerateLoadArguments(masm); |
| 10179 | } |
| 10180 | |
| 10181 | // Internal frame is necessary to handle exceptions properly. |
| 10182 | __ EnterInternalFrame(); |
| 10183 | |
| 10184 | // Push arguments on stack if the stub expects them there. |
| 10185 | if (!HasArgsInRegisters()) { |
| 10186 | __ push(edx); |
| 10187 | __ push(eax); |
| 10188 | } |
| 10189 | // Call the stub proper to get the result in eax. |
| 10190 | __ call(&get_result); |
| 10191 | __ LeaveInternalFrame(); |
| 10192 | |
| 10193 | __ pop(ecx); // Return address. |
| 10194 | // Left and right arguments are now on top. |
| 10195 | // Push the operation result. The tail call to BinaryOp_Patch will |
| 10196 | // return it to the original caller. |
| 10197 | __ push(eax); |
| 10198 | // Push this stub's key. Although the operation and the type info are |
| 10199 | // encoded into the key, the encoding is opaque, so push them too. |
| 10200 | __ push(Immediate(Smi::FromInt(MinorKey()))); |
| 10201 | __ push(Immediate(Smi::FromInt(op_))); |
| 10202 | __ push(Immediate(Smi::FromInt(runtime_operands_type_))); |
| 10203 | |
| 10204 | __ push(ecx); // Return address. |
| 10205 | |
| 10206 | // Patch the caller to an appropriate specialized stub |
| 10207 | // and return the operation result. |
| 10208 | __ TailCallExternalReference( |
| 10209 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch)), |
| 10210 | 6, |
| 10211 | 1); |
| 10212 | |
| 10213 | // The entry point for the result calculation is assumed to be immediately |
| 10214 | // after this sequence. |
| 10215 | __ bind(&get_result); |
| 10216 | } |
| 10217 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 10218 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10219 | Handle<Code> GetBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info) { |
| 10220 | GenericBinaryOpStub stub(key, type_info); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10221 | return stub.GetCode(); |
| 10222 | } |
| 10223 | |
| 10224 | |
| 10225 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
| 10226 | // Input on stack: |
| 10227 | // esp[4]: argument (should be number). |
| 10228 | // esp[0]: return address. |
| 10229 | // Test that eax is a number. |
| 10230 | Label runtime_call; |
| 10231 | Label runtime_call_clear_stack; |
| 10232 | Label input_not_smi; |
| 10233 | Label loaded; |
| 10234 | __ mov(eax, Operand(esp, kPointerSize)); |
| 10235 | __ test(eax, Immediate(kSmiTagMask)); |
| 10236 | __ j(not_zero, &input_not_smi); |
| 10237 | // Input is a smi. Untag and load it onto the FPU stack. |
| 10238 | // Then load the low and high words of the double into ebx, edx. |
| 10239 | ASSERT_EQ(1, kSmiTagSize); |
| 10240 | __ sar(eax, 1); |
| 10241 | __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| 10242 | __ mov(Operand(esp, 0), eax); |
| 10243 | __ fild_s(Operand(esp, 0)); |
| 10244 | __ fst_d(Operand(esp, 0)); |
| 10245 | __ pop(edx); |
| 10246 | __ pop(ebx); |
| 10247 | __ jmp(&loaded); |
| 10248 | __ bind(&input_not_smi); |
| 10249 | // Check if input is a HeapNumber. |
| 10250 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 10251 | __ cmp(Operand(ebx), Immediate(Factory::heap_number_map())); |
| 10252 | __ j(not_equal, &runtime_call); |
| 10253 | // Input is a HeapNumber. Push it on the FPU stack and load its |
| 10254 | // low and high words into ebx, edx. |
| 10255 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 10256 | __ mov(edx, FieldOperand(eax, HeapNumber::kExponentOffset)); |
| 10257 | __ mov(ebx, FieldOperand(eax, HeapNumber::kMantissaOffset)); |
| 10258 | |
| 10259 | __ bind(&loaded); |
| 10260 | // ST[0] == double value |
| 10261 | // ebx = low 32 bits of double value |
| 10262 | // edx = high 32 bits of double value |
| 10263 | // Compute hash: |
| 10264 | // h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1); |
| 10265 | __ mov(ecx, ebx); |
| 10266 | __ xor_(ecx, Operand(edx)); |
| 10267 | __ mov(eax, ecx); |
| 10268 | __ sar(eax, 16); |
| 10269 | __ xor_(ecx, Operand(eax)); |
| 10270 | __ mov(eax, ecx); |
| 10271 | __ sar(eax, 8); |
| 10272 | __ xor_(ecx, Operand(eax)); |
| 10273 | ASSERT(IsPowerOf2(TranscendentalCache::kCacheSize)); |
| 10274 | __ and_(Operand(ecx), Immediate(TranscendentalCache::kCacheSize - 1)); |
| 10275 | // ST[0] == double value. |
| 10276 | // ebx = low 32 bits of double value. |
| 10277 | // edx = high 32 bits of double value. |
| 10278 | // ecx = TranscendentalCache::hash(double value). |
| 10279 | __ mov(eax, |
| 10280 | Immediate(ExternalReference::transcendental_cache_array_address())); |
| 10281 | // Eax points to cache array. |
| 10282 | __ mov(eax, Operand(eax, type_ * sizeof(TranscendentalCache::caches_[0]))); |
| 10283 | // Eax points to the cache for the type type_. |
| 10284 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 10285 | __ test(eax, Operand(eax)); |
| 10286 | __ j(zero, &runtime_call_clear_stack); |
| 10287 | #ifdef DEBUG |
| 10288 | // Check that the layout of cache elements match expectations. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 10289 | { TranscendentalCache::Element test_elem[2]; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10290 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 10291 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 10292 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 10293 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 10294 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 10295 | CHECK_EQ(12, elem2_start - elem_start); // Two uint_32's and a pointer. |
| 10296 | CHECK_EQ(0, elem_in0 - elem_start); |
| 10297 | CHECK_EQ(kIntSize, elem_in1 - elem_start); |
| 10298 | CHECK_EQ(2 * kIntSize, elem_out - elem_start); |
| 10299 | } |
| 10300 | #endif |
| 10301 | // Find the address of the ecx'th entry in the cache, i.e., &eax[ecx*12]. |
| 10302 | __ lea(ecx, Operand(ecx, ecx, times_2, 0)); |
| 10303 | __ lea(ecx, Operand(eax, ecx, times_4, 0)); |
| 10304 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
| 10305 | Label cache_miss; |
| 10306 | __ cmp(ebx, Operand(ecx, 0)); |
| 10307 | __ j(not_equal, &cache_miss); |
| 10308 | __ cmp(edx, Operand(ecx, kIntSize)); |
| 10309 | __ j(not_equal, &cache_miss); |
| 10310 | // Cache hit! |
| 10311 | __ mov(eax, Operand(ecx, 2 * kIntSize)); |
| 10312 | __ fstp(0); |
| 10313 | __ ret(kPointerSize); |
| 10314 | |
| 10315 | __ bind(&cache_miss); |
| 10316 | // Update cache with new value. |
| 10317 | // We are short on registers, so use no_reg as scratch. |
| 10318 | // This gives slightly larger code. |
| 10319 | __ AllocateHeapNumber(eax, edi, no_reg, &runtime_call_clear_stack); |
| 10320 | GenerateOperation(masm); |
| 10321 | __ mov(Operand(ecx, 0), ebx); |
| 10322 | __ mov(Operand(ecx, kIntSize), edx); |
| 10323 | __ mov(Operand(ecx, 2 * kIntSize), eax); |
| 10324 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 10325 | __ ret(kPointerSize); |
| 10326 | |
| 10327 | __ bind(&runtime_call_clear_stack); |
| 10328 | __ fstp(0); |
| 10329 | __ bind(&runtime_call); |
| 10330 | __ TailCallExternalReference(ExternalReference(RuntimeFunction()), 1, 1); |
| 10331 | } |
| 10332 | |
| 10333 | |
| 10334 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
| 10335 | switch (type_) { |
| 10336 | // Add more cases when necessary. |
| 10337 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 10338 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
| 10339 | default: |
| 10340 | UNIMPLEMENTED(); |
| 10341 | return Runtime::kAbort; |
| 10342 | } |
| 10343 | } |
| 10344 | |
| 10345 | |
| 10346 | void TranscendentalCacheStub::GenerateOperation(MacroAssembler* masm) { |
| 10347 | // Only free register is edi. |
| 10348 | Label done; |
| 10349 | ASSERT(type_ == TranscendentalCache::SIN || |
| 10350 | type_ == TranscendentalCache::COS); |
| 10351 | // More transcendental types can be added later. |
| 10352 | |
| 10353 | // Both fsin and fcos require arguments in the range +/-2^63 and |
| 10354 | // return NaN for infinities and NaN. They can share all code except |
| 10355 | // the actual fsin/fcos operation. |
| 10356 | Label in_range; |
| 10357 | // If argument is outside the range -2^63..2^63, fsin/cos doesn't |
| 10358 | // work. We must reduce it to the appropriate range. |
| 10359 | __ mov(edi, edx); |
| 10360 | __ and_(Operand(edi), Immediate(0x7ff00000)); // Exponent only. |
| 10361 | int supported_exponent_limit = |
| 10362 | (63 + HeapNumber::kExponentBias) << HeapNumber::kExponentShift; |
| 10363 | __ cmp(Operand(edi), Immediate(supported_exponent_limit)); |
| 10364 | __ j(below, &in_range, taken); |
| 10365 | // Check for infinity and NaN. Both return NaN for sin. |
| 10366 | __ cmp(Operand(edi), Immediate(0x7ff00000)); |
| 10367 | Label non_nan_result; |
| 10368 | __ j(not_equal, &non_nan_result, taken); |
| 10369 | // Input is +/-Infinity or NaN. Result is NaN. |
| 10370 | __ fstp(0); |
| 10371 | // NaN is represented by 0x7ff8000000000000. |
| 10372 | __ push(Immediate(0x7ff80000)); |
| 10373 | __ push(Immediate(0)); |
| 10374 | __ fld_d(Operand(esp, 0)); |
| 10375 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 10376 | __ jmp(&done); |
| 10377 | |
| 10378 | __ bind(&non_nan_result); |
| 10379 | |
| 10380 | // Use fpmod to restrict argument to the range +/-2*PI. |
| 10381 | __ mov(edi, eax); // Save eax before using fnstsw_ax. |
| 10382 | __ fldpi(); |
| 10383 | __ fadd(0); |
| 10384 | __ fld(1); |
| 10385 | // FPU Stack: input, 2*pi, input. |
| 10386 | { |
| 10387 | Label no_exceptions; |
| 10388 | __ fwait(); |
| 10389 | __ fnstsw_ax(); |
| 10390 | // Clear if Illegal Operand or Zero Division exceptions are set. |
| 10391 | __ test(Operand(eax), Immediate(5)); |
| 10392 | __ j(zero, &no_exceptions); |
| 10393 | __ fnclex(); |
| 10394 | __ bind(&no_exceptions); |
| 10395 | } |
| 10396 | |
| 10397 | // Compute st(0) % st(1) |
| 10398 | { |
| 10399 | Label partial_remainder_loop; |
| 10400 | __ bind(&partial_remainder_loop); |
| 10401 | __ fprem1(); |
| 10402 | __ fwait(); |
| 10403 | __ fnstsw_ax(); |
| 10404 | __ test(Operand(eax), Immediate(0x400 /* C2 */)); |
| 10405 | // If C2 is set, computation only has partial result. Loop to |
| 10406 | // continue computation. |
| 10407 | __ j(not_zero, &partial_remainder_loop); |
| 10408 | } |
| 10409 | // FPU Stack: input, 2*pi, input % 2*pi |
| 10410 | __ fstp(2); |
| 10411 | __ fstp(0); |
| 10412 | __ mov(eax, edi); // Restore eax (allocated HeapNumber pointer). |
| 10413 | |
| 10414 | // FPU Stack: input % 2*pi |
| 10415 | __ bind(&in_range); |
| 10416 | switch (type_) { |
| 10417 | case TranscendentalCache::SIN: |
| 10418 | __ fsin(); |
| 10419 | break; |
| 10420 | case TranscendentalCache::COS: |
| 10421 | __ fcos(); |
| 10422 | break; |
| 10423 | default: |
| 10424 | UNREACHABLE(); |
| 10425 | } |
| 10426 | __ bind(&done); |
| 10427 | } |
| 10428 | |
| 10429 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10430 | // Get the integer part of a heap number. Surprisingly, all this bit twiddling |
| 10431 | // is faster than using the built-in instructions on floating point registers. |
| 10432 | // Trashes edi and ebx. Dest is ecx. Source cannot be ecx or one of the |
| 10433 | // trashed registers. |
| 10434 | void IntegerConvert(MacroAssembler* masm, |
| 10435 | Register source, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10436 | TypeInfo type_info, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10437 | bool use_sse3, |
| 10438 | Label* conversion_failure) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10439 | ASSERT(!source.is(ecx) && !source.is(edi) && !source.is(ebx)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10440 | Label done, right_exponent, normal_exponent; |
| 10441 | Register scratch = ebx; |
| 10442 | Register scratch2 = edi; |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 10443 | if (type_info.IsInteger32() && CpuFeatures::IsEnabled(SSE2)) { |
| 10444 | CpuFeatures::Scope scope(SSE2); |
| 10445 | __ cvttsd2si(ecx, FieldOperand(source, HeapNumber::kValueOffset)); |
| 10446 | return; |
| 10447 | } |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10448 | if (!type_info.IsInteger32() || !use_sse3) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10449 | // Get exponent word. |
| 10450 | __ mov(scratch, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 10451 | // Get exponent alone in scratch2. |
| 10452 | __ mov(scratch2, scratch); |
| 10453 | __ and_(scratch2, HeapNumber::kExponentMask); |
| 10454 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10455 | if (use_sse3) { |
| 10456 | CpuFeatures::Scope scope(SSE3); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10457 | if (!type_info.IsInteger32()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10458 | // Check whether the exponent is too big for a 64 bit signed integer. |
| 10459 | static const uint32_t kTooBigExponent = |
| 10460 | (HeapNumber::kExponentBias + 63) << HeapNumber::kExponentShift; |
| 10461 | __ cmp(Operand(scratch2), Immediate(kTooBigExponent)); |
| 10462 | __ j(greater_equal, conversion_failure); |
| 10463 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10464 | // Load x87 register with heap number. |
| 10465 | __ fld_d(FieldOperand(source, HeapNumber::kValueOffset)); |
| 10466 | // Reserve space for 64 bit answer. |
| 10467 | __ sub(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 10468 | // Do conversion, which cannot fail because we checked the exponent. |
| 10469 | __ fisttp_d(Operand(esp, 0)); |
| 10470 | __ mov(ecx, Operand(esp, 0)); // Load low word of answer into ecx. |
| 10471 | __ add(Operand(esp), Immediate(sizeof(uint64_t))); // Nolint. |
| 10472 | } else { |
| 10473 | // Load ecx with zero. We use this either for the final shift or |
| 10474 | // for the answer. |
| 10475 | __ xor_(ecx, Operand(ecx)); |
| 10476 | // Check whether the exponent matches a 32 bit signed int that cannot be |
| 10477 | // represented by a Smi. A non-smi 32 bit integer is 1.xxx * 2^30 so the |
| 10478 | // exponent is 30 (biased). This is the exponent that we are fastest at and |
| 10479 | // also the highest exponent we can handle here. |
| 10480 | const uint32_t non_smi_exponent = |
| 10481 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 10482 | __ cmp(Operand(scratch2), Immediate(non_smi_exponent)); |
| 10483 | // If we have a match of the int32-but-not-Smi exponent then skip some |
| 10484 | // logic. |
| 10485 | __ j(equal, &right_exponent); |
| 10486 | // If the exponent is higher than that then go to slow case. This catches |
| 10487 | // numbers that don't fit in a signed int32, infinities and NaNs. |
| 10488 | __ j(less, &normal_exponent); |
| 10489 | |
| 10490 | { |
| 10491 | // Handle a big exponent. The only reason we have this code is that the |
| 10492 | // >>> operator has a tendency to generate numbers with an exponent of 31. |
| 10493 | const uint32_t big_non_smi_exponent = |
| 10494 | (HeapNumber::kExponentBias + 31) << HeapNumber::kExponentShift; |
| 10495 | __ cmp(Operand(scratch2), Immediate(big_non_smi_exponent)); |
| 10496 | __ j(not_equal, conversion_failure); |
| 10497 | // We have the big exponent, typically from >>>. This means the number is |
| 10498 | // in the range 2^31 to 2^32 - 1. Get the top bits of the mantissa. |
| 10499 | __ mov(scratch2, scratch); |
| 10500 | __ and_(scratch2, HeapNumber::kMantissaMask); |
| 10501 | // Put back the implicit 1. |
| 10502 | __ or_(scratch2, 1 << HeapNumber::kExponentShift); |
| 10503 | // Shift up the mantissa bits to take up the space the exponent used to |
| 10504 | // take. We just orred in the implicit bit so that took care of one and |
| 10505 | // we want to use the full unsigned range so we subtract 1 bit from the |
| 10506 | // shift distance. |
| 10507 | const int big_shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 1; |
| 10508 | __ shl(scratch2, big_shift_distance); |
| 10509 | // Get the second half of the double. |
| 10510 | __ mov(ecx, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 10511 | // Shift down 21 bits to get the most significant 11 bits or the low |
| 10512 | // mantissa word. |
| 10513 | __ shr(ecx, 32 - big_shift_distance); |
| 10514 | __ or_(ecx, Operand(scratch2)); |
| 10515 | // We have the answer in ecx, but we may need to negate it. |
| 10516 | __ test(scratch, Operand(scratch)); |
| 10517 | __ j(positive, &done); |
| 10518 | __ neg(ecx); |
| 10519 | __ jmp(&done); |
| 10520 | } |
| 10521 | |
| 10522 | __ bind(&normal_exponent); |
| 10523 | // Exponent word in scratch, exponent part of exponent word in scratch2. |
| 10524 | // Zero in ecx. |
| 10525 | // We know the exponent is smaller than 30 (biased). If it is less than |
| 10526 | // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, ie |
| 10527 | // it rounds to zero. |
| 10528 | const uint32_t zero_exponent = |
| 10529 | (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift; |
| 10530 | __ sub(Operand(scratch2), Immediate(zero_exponent)); |
| 10531 | // ecx already has a Smi zero. |
| 10532 | __ j(less, &done); |
| 10533 | |
| 10534 | // We have a shifted exponent between 0 and 30 in scratch2. |
| 10535 | __ shr(scratch2, HeapNumber::kExponentShift); |
| 10536 | __ mov(ecx, Immediate(30)); |
| 10537 | __ sub(ecx, Operand(scratch2)); |
| 10538 | |
| 10539 | __ bind(&right_exponent); |
| 10540 | // Here ecx is the shift, scratch is the exponent word. |
| 10541 | // Get the top bits of the mantissa. |
| 10542 | __ and_(scratch, HeapNumber::kMantissaMask); |
| 10543 | // Put back the implicit 1. |
| 10544 | __ or_(scratch, 1 << HeapNumber::kExponentShift); |
| 10545 | // Shift up the mantissa bits to take up the space the exponent used to |
| 10546 | // take. We have kExponentShift + 1 significant bits int he low end of the |
| 10547 | // word. Shift them to the top bits. |
| 10548 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 10549 | __ shl(scratch, shift_distance); |
| 10550 | // Get the second half of the double. For some exponents we don't |
| 10551 | // actually need this because the bits get shifted out again, but |
| 10552 | // it's probably slower to test than just to do it. |
| 10553 | __ mov(scratch2, FieldOperand(source, HeapNumber::kMantissaOffset)); |
| 10554 | // Shift down 22 bits to get the most significant 10 bits or the low |
| 10555 | // mantissa word. |
| 10556 | __ shr(scratch2, 32 - shift_distance); |
| 10557 | __ or_(scratch2, Operand(scratch)); |
| 10558 | // Move down according to the exponent. |
| 10559 | __ shr_cl(scratch2); |
| 10560 | // Now the unsigned answer is in scratch2. We need to move it to ecx and |
| 10561 | // we may need to fix the sign. |
| 10562 | Label negative; |
| 10563 | __ xor_(ecx, Operand(ecx)); |
| 10564 | __ cmp(ecx, FieldOperand(source, HeapNumber::kExponentOffset)); |
| 10565 | __ j(greater, &negative); |
| 10566 | __ mov(ecx, scratch2); |
| 10567 | __ jmp(&done); |
| 10568 | __ bind(&negative); |
| 10569 | __ sub(ecx, Operand(scratch2)); |
| 10570 | __ bind(&done); |
| 10571 | } |
| 10572 | } |
| 10573 | |
| 10574 | |
| 10575 | // Input: edx, eax are the left and right objects of a bit op. |
| 10576 | // Output: eax, ecx are left and right integers for a bit op. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10577 | void FloatingPointHelper::LoadNumbersAsIntegers(MacroAssembler* masm, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10578 | TypeInfo type_info, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10579 | bool use_sse3, |
| 10580 | Label* conversion_failure) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10581 | // Check float operands. |
| 10582 | Label arg1_is_object, check_undefined_arg1; |
| 10583 | Label arg2_is_object, check_undefined_arg2; |
| 10584 | Label load_arg2, done; |
| 10585 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10586 | if (!type_info.IsDouble()) { |
| 10587 | if (!type_info.IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10588 | __ test(edx, Immediate(kSmiTagMask)); |
| 10589 | __ j(not_zero, &arg1_is_object); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 10590 | } else { |
| 10591 | if (FLAG_debug_code) __ AbortIfNotSmi(edx); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10592 | } |
| 10593 | __ SmiUntag(edx); |
| 10594 | __ jmp(&load_arg2); |
| 10595 | } |
| 10596 | |
| 10597 | __ bind(&arg1_is_object); |
| 10598 | |
| 10599 | // Get the untagged integer version of the edx heap number in ecx. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10600 | IntegerConvert(masm, edx, type_info, use_sse3, conversion_failure); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10601 | __ mov(edx, ecx); |
| 10602 | |
| 10603 | // Here edx has the untagged integer, eax has a Smi or a heap number. |
| 10604 | __ bind(&load_arg2); |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10605 | if (!type_info.IsDouble()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10606 | // Test if arg2 is a Smi. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10607 | if (!type_info.IsSmi()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10608 | __ test(eax, Immediate(kSmiTagMask)); |
| 10609 | __ j(not_zero, &arg2_is_object); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 10610 | } else { |
| 10611 | if (FLAG_debug_code) __ AbortIfNotSmi(eax); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10612 | } |
| 10613 | __ SmiUntag(eax); |
| 10614 | __ mov(ecx, eax); |
| 10615 | __ jmp(&done); |
| 10616 | } |
| 10617 | |
| 10618 | __ bind(&arg2_is_object); |
| 10619 | |
| 10620 | // Get the untagged integer version of the eax heap number in ecx. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10621 | IntegerConvert(masm, eax, type_info, use_sse3, conversion_failure); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10622 | __ bind(&done); |
| 10623 | __ mov(eax, edx); |
| 10624 | } |
| 10625 | |
| 10626 | |
| 10627 | // Input: edx, eax are the left and right objects of a bit op. |
| 10628 | // Output: eax, ecx are left and right integers for a bit op. |
| 10629 | void FloatingPointHelper::LoadUnknownsAsIntegers(MacroAssembler* masm, |
| 10630 | bool use_sse3, |
| 10631 | Label* conversion_failure) { |
| 10632 | // Check float operands. |
| 10633 | Label arg1_is_object, check_undefined_arg1; |
| 10634 | Label arg2_is_object, check_undefined_arg2; |
| 10635 | Label load_arg2, done; |
| 10636 | |
| 10637 | // Test if arg1 is a Smi. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10638 | __ test(edx, Immediate(kSmiTagMask)); |
| 10639 | __ j(not_zero, &arg1_is_object); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10640 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10641 | __ SmiUntag(edx); |
| 10642 | __ jmp(&load_arg2); |
| 10643 | |
| 10644 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 10645 | __ bind(&check_undefined_arg1); |
| 10646 | __ cmp(edx, Factory::undefined_value()); |
| 10647 | __ j(not_equal, conversion_failure); |
| 10648 | __ mov(edx, Immediate(0)); |
| 10649 | __ jmp(&load_arg2); |
| 10650 | |
| 10651 | __ bind(&arg1_is_object); |
| 10652 | __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 10653 | __ cmp(ebx, Factory::heap_number_map()); |
| 10654 | __ j(not_equal, &check_undefined_arg1); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10655 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10656 | // Get the untagged integer version of the edx heap number in ecx. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10657 | IntegerConvert(masm, |
| 10658 | edx, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10659 | TypeInfo::Unknown(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10660 | use_sse3, |
| 10661 | conversion_failure); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10662 | __ mov(edx, ecx); |
| 10663 | |
| 10664 | // Here edx has the untagged integer, eax has a Smi or a heap number. |
| 10665 | __ bind(&load_arg2); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10666 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10667 | // Test if arg2 is a Smi. |
| 10668 | __ test(eax, Immediate(kSmiTagMask)); |
| 10669 | __ j(not_zero, &arg2_is_object); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10670 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10671 | __ SmiUntag(eax); |
| 10672 | __ mov(ecx, eax); |
| 10673 | __ jmp(&done); |
| 10674 | |
| 10675 | // If the argument is undefined it converts to zero (ECMA-262, section 9.5). |
| 10676 | __ bind(&check_undefined_arg2); |
| 10677 | __ cmp(eax, Factory::undefined_value()); |
| 10678 | __ j(not_equal, conversion_failure); |
| 10679 | __ mov(ecx, Immediate(0)); |
| 10680 | __ jmp(&done); |
| 10681 | |
| 10682 | __ bind(&arg2_is_object); |
| 10683 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 10684 | __ cmp(ebx, Factory::heap_number_map()); |
| 10685 | __ j(not_equal, &check_undefined_arg2); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10686 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10687 | // Get the untagged integer version of the eax heap number in ecx. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10688 | IntegerConvert(masm, |
| 10689 | eax, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10690 | TypeInfo::Unknown(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10691 | use_sse3, |
| 10692 | conversion_failure); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10693 | __ bind(&done); |
| 10694 | __ mov(eax, edx); |
| 10695 | } |
| 10696 | |
| 10697 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10698 | void FloatingPointHelper::LoadAsIntegers(MacroAssembler* masm, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10699 | TypeInfo type_info, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10700 | bool use_sse3, |
| 10701 | Label* conversion_failure) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10702 | if (type_info.IsNumber()) { |
| 10703 | LoadNumbersAsIntegers(masm, type_info, use_sse3, conversion_failure); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10704 | } else { |
| 10705 | LoadUnknownsAsIntegers(masm, use_sse3, conversion_failure); |
| 10706 | } |
| 10707 | } |
| 10708 | |
| 10709 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10710 | void FloatingPointHelper::LoadFloatOperand(MacroAssembler* masm, |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 10711 | Register number) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10712 | Label load_smi, done; |
| 10713 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 10714 | __ test(number, Immediate(kSmiTagMask)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10715 | __ j(zero, &load_smi, not_taken); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 10716 | __ fld_d(FieldOperand(number, HeapNumber::kValueOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10717 | __ jmp(&done); |
| 10718 | |
| 10719 | __ bind(&load_smi); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10720 | __ SmiUntag(number); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 10721 | __ push(number); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10722 | __ fild_s(Operand(esp, 0)); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 10723 | __ pop(number); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10724 | |
| 10725 | __ bind(&done); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10726 | } |
| 10727 | |
| 10728 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10729 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm) { |
| 10730 | Label load_smi_edx, load_eax, load_smi_eax, done; |
| 10731 | // Load operand in edx into xmm0. |
| 10732 | __ test(edx, Immediate(kSmiTagMask)); |
| 10733 | __ j(zero, &load_smi_edx, not_taken); // Argument in edx is a smi. |
| 10734 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 10735 | |
| 10736 | __ bind(&load_eax); |
| 10737 | // Load operand in eax into xmm1. |
| 10738 | __ test(eax, Immediate(kSmiTagMask)); |
| 10739 | __ j(zero, &load_smi_eax, not_taken); // Argument in eax is a smi. |
| 10740 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 10741 | __ jmp(&done); |
| 10742 | |
| 10743 | __ bind(&load_smi_edx); |
| 10744 | __ SmiUntag(edx); // Untag smi before converting to float. |
| 10745 | __ cvtsi2sd(xmm0, Operand(edx)); |
| 10746 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
| 10747 | __ jmp(&load_eax); |
| 10748 | |
| 10749 | __ bind(&load_smi_eax); |
| 10750 | __ SmiUntag(eax); // Untag smi before converting to float. |
| 10751 | __ cvtsi2sd(xmm1, Operand(eax)); |
| 10752 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
| 10753 | |
| 10754 | __ bind(&done); |
| 10755 | } |
| 10756 | |
| 10757 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10758 | void FloatingPointHelper::LoadSSE2Operands(MacroAssembler* masm, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 10759 | Label* not_numbers) { |
| 10760 | Label load_smi_edx, load_eax, load_smi_eax, load_float_eax, done; |
| 10761 | // Load operand in edx into xmm0, or branch to not_numbers. |
| 10762 | __ test(edx, Immediate(kSmiTagMask)); |
| 10763 | __ j(zero, &load_smi_edx, not_taken); // Argument in edx is a smi. |
| 10764 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), Factory::heap_number_map()); |
| 10765 | __ j(not_equal, not_numbers); // Argument in edx is not a number. |
| 10766 | __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset)); |
| 10767 | __ bind(&load_eax); |
| 10768 | // Load operand in eax into xmm1, or branch to not_numbers. |
| 10769 | __ test(eax, Immediate(kSmiTagMask)); |
| 10770 | __ j(zero, &load_smi_eax, not_taken); // Argument in eax is a smi. |
| 10771 | __ cmp(FieldOperand(eax, HeapObject::kMapOffset), Factory::heap_number_map()); |
| 10772 | __ j(equal, &load_float_eax); |
| 10773 | __ jmp(not_numbers); // Argument in eax is not a number. |
| 10774 | __ bind(&load_smi_edx); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10775 | __ SmiUntag(edx); // Untag smi before converting to float. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 10776 | __ cvtsi2sd(xmm0, Operand(edx)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10777 | __ SmiTag(edx); // Retag smi for heap number overwriting test. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 10778 | __ jmp(&load_eax); |
| 10779 | __ bind(&load_smi_eax); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10780 | __ SmiUntag(eax); // Untag smi before converting to float. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 10781 | __ cvtsi2sd(xmm1, Operand(eax)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10782 | __ SmiTag(eax); // Retag smi for heap number overwriting test. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 10783 | __ jmp(&done); |
| 10784 | __ bind(&load_float_eax); |
| 10785 | __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset)); |
| 10786 | __ bind(&done); |
| 10787 | } |
| 10788 | |
| 10789 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10790 | void FloatingPointHelper::LoadSSE2Smis(MacroAssembler* masm, |
| 10791 | Register scratch) { |
| 10792 | const Register left = edx; |
| 10793 | const Register right = eax; |
| 10794 | __ mov(scratch, left); |
| 10795 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 10796 | __ SmiUntag(scratch); |
| 10797 | __ cvtsi2sd(xmm0, Operand(scratch)); |
| 10798 | |
| 10799 | __ mov(scratch, right); |
| 10800 | __ SmiUntag(scratch); |
| 10801 | __ cvtsi2sd(xmm1, Operand(scratch)); |
| 10802 | } |
| 10803 | |
| 10804 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10805 | void FloatingPointHelper::LoadFloatOperands(MacroAssembler* masm, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10806 | Register scratch, |
| 10807 | ArgLocation arg_location) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10808 | Label load_smi_1, load_smi_2, done_load_1, done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10809 | if (arg_location == ARGS_IN_REGISTERS) { |
| 10810 | __ mov(scratch, edx); |
| 10811 | } else { |
| 10812 | __ mov(scratch, Operand(esp, 2 * kPointerSize)); |
| 10813 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10814 | __ test(scratch, Immediate(kSmiTagMask)); |
| 10815 | __ j(zero, &load_smi_1, not_taken); |
| 10816 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 10817 | __ bind(&done_load_1); |
| 10818 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10819 | if (arg_location == ARGS_IN_REGISTERS) { |
| 10820 | __ mov(scratch, eax); |
| 10821 | } else { |
| 10822 | __ mov(scratch, Operand(esp, 1 * kPointerSize)); |
| 10823 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10824 | __ test(scratch, Immediate(kSmiTagMask)); |
| 10825 | __ j(zero, &load_smi_2, not_taken); |
| 10826 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 10827 | __ jmp(&done); |
| 10828 | |
| 10829 | __ bind(&load_smi_1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10830 | __ SmiUntag(scratch); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10831 | __ push(scratch); |
| 10832 | __ fild_s(Operand(esp, 0)); |
| 10833 | __ pop(scratch); |
| 10834 | __ jmp(&done_load_1); |
| 10835 | |
| 10836 | __ bind(&load_smi_2); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10837 | __ SmiUntag(scratch); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10838 | __ push(scratch); |
| 10839 | __ fild_s(Operand(esp, 0)); |
| 10840 | __ pop(scratch); |
| 10841 | |
| 10842 | __ bind(&done); |
| 10843 | } |
| 10844 | |
| 10845 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10846 | void FloatingPointHelper::LoadFloatSmis(MacroAssembler* masm, |
| 10847 | Register scratch) { |
| 10848 | const Register left = edx; |
| 10849 | const Register right = eax; |
| 10850 | __ mov(scratch, left); |
| 10851 | ASSERT(!scratch.is(right)); // We're about to clobber scratch. |
| 10852 | __ SmiUntag(scratch); |
| 10853 | __ push(scratch); |
| 10854 | __ fild_s(Operand(esp, 0)); |
| 10855 | |
| 10856 | __ mov(scratch, right); |
| 10857 | __ SmiUntag(scratch); |
| 10858 | __ mov(Operand(esp, 0), scratch); |
| 10859 | __ fild_s(Operand(esp, 0)); |
| 10860 | __ pop(scratch); |
| 10861 | } |
| 10862 | |
| 10863 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10864 | void FloatingPointHelper::CheckFloatOperands(MacroAssembler* masm, |
| 10865 | Label* non_float, |
| 10866 | Register scratch) { |
| 10867 | Label test_other, done; |
| 10868 | // Test if both operands are floats or smi -> scratch=k_is_float; |
| 10869 | // Otherwise scratch = k_not_float. |
| 10870 | __ test(edx, Immediate(kSmiTagMask)); |
| 10871 | __ j(zero, &test_other, not_taken); // argument in edx is OK |
| 10872 | __ mov(scratch, FieldOperand(edx, HeapObject::kMapOffset)); |
| 10873 | __ cmp(scratch, Factory::heap_number_map()); |
| 10874 | __ j(not_equal, non_float); // argument in edx is not a number -> NaN |
| 10875 | |
| 10876 | __ bind(&test_other); |
| 10877 | __ test(eax, Immediate(kSmiTagMask)); |
| 10878 | __ j(zero, &done); // argument in eax is OK |
| 10879 | __ mov(scratch, FieldOperand(eax, HeapObject::kMapOffset)); |
| 10880 | __ cmp(scratch, Factory::heap_number_map()); |
| 10881 | __ j(not_equal, non_float); // argument in eax is not a number -> NaN |
| 10882 | |
| 10883 | // Fall-through: Both operands are numbers. |
| 10884 | __ bind(&done); |
| 10885 | } |
| 10886 | |
| 10887 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10888 | void GenericUnaryOpStub::Generate(MacroAssembler* masm) { |
| 10889 | Label slow, done; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10890 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10891 | if (op_ == Token::SUB) { |
| 10892 | // Check whether the value is a smi. |
| 10893 | Label try_float; |
| 10894 | __ test(eax, Immediate(kSmiTagMask)); |
| 10895 | __ j(not_zero, &try_float, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10896 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10897 | // Go slow case if the value of the expression is zero |
| 10898 | // to make sure that we switch between 0 and -0. |
| 10899 | __ test(eax, Operand(eax)); |
| 10900 | __ j(zero, &slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10901 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10902 | // The value of the expression is a smi that is not zero. Try |
| 10903 | // optimistic subtraction '0 - value'. |
| 10904 | Label undo; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10905 | __ mov(edx, Operand(eax)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10906 | __ Set(eax, Immediate(0)); |
| 10907 | __ sub(eax, Operand(edx)); |
| 10908 | __ j(overflow, &undo, not_taken); |
| 10909 | |
| 10910 | // If result is a smi we are done. |
| 10911 | __ test(eax, Immediate(kSmiTagMask)); |
| 10912 | __ j(zero, &done, taken); |
| 10913 | |
| 10914 | // Restore eax and go slow case. |
| 10915 | __ bind(&undo); |
| 10916 | __ mov(eax, Operand(edx)); |
| 10917 | __ jmp(&slow); |
| 10918 | |
| 10919 | // Try floating point case. |
| 10920 | __ bind(&try_float); |
| 10921 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 10922 | __ cmp(edx, Factory::heap_number_map()); |
| 10923 | __ j(not_equal, &slow); |
| 10924 | if (overwrite_) { |
| 10925 | __ mov(edx, FieldOperand(eax, HeapNumber::kExponentOffset)); |
| 10926 | __ xor_(edx, HeapNumber::kSignMask); // Flip sign. |
| 10927 | __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), edx); |
| 10928 | } else { |
| 10929 | __ mov(edx, Operand(eax)); |
| 10930 | // edx: operand |
| 10931 | __ AllocateHeapNumber(eax, ebx, ecx, &undo); |
| 10932 | // eax: allocated 'empty' number |
| 10933 | __ mov(ecx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 10934 | __ xor_(ecx, HeapNumber::kSignMask); // Flip sign. |
| 10935 | __ mov(FieldOperand(eax, HeapNumber::kExponentOffset), ecx); |
| 10936 | __ mov(ecx, FieldOperand(edx, HeapNumber::kMantissaOffset)); |
| 10937 | __ mov(FieldOperand(eax, HeapNumber::kMantissaOffset), ecx); |
| 10938 | } |
| 10939 | } else if (op_ == Token::BIT_NOT) { |
| 10940 | // Check if the operand is a heap number. |
| 10941 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 10942 | __ cmp(edx, Factory::heap_number_map()); |
| 10943 | __ j(not_equal, &slow, not_taken); |
| 10944 | |
| 10945 | // Convert the heap number in eax to an untagged integer in ecx. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10946 | IntegerConvert(masm, |
| 10947 | eax, |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 10948 | TypeInfo::Unknown(), |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10949 | CpuFeatures::IsSupported(SSE3), |
| 10950 | &slow); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10951 | |
| 10952 | // Do the bitwise operation and check if the result fits in a smi. |
| 10953 | Label try_float; |
| 10954 | __ not_(ecx); |
| 10955 | __ cmp(ecx, 0xc0000000); |
| 10956 | __ j(sign, &try_float, not_taken); |
| 10957 | |
| 10958 | // Tag the result as a smi and we're done. |
| 10959 | ASSERT(kSmiTagSize == 1); |
| 10960 | __ lea(eax, Operand(ecx, times_2, kSmiTag)); |
| 10961 | __ jmp(&done); |
| 10962 | |
| 10963 | // Try to store the result in a heap number. |
| 10964 | __ bind(&try_float); |
| 10965 | if (!overwrite_) { |
| 10966 | // Allocate a fresh heap number, but don't overwrite eax until |
| 10967 | // we're sure we can do it without going through the slow case |
| 10968 | // that needs the value in eax. |
| 10969 | __ AllocateHeapNumber(ebx, edx, edi, &slow); |
| 10970 | __ mov(eax, Operand(ebx)); |
| 10971 | } |
| 10972 | if (CpuFeatures::IsSupported(SSE2)) { |
| 10973 | CpuFeatures::Scope use_sse2(SSE2); |
| 10974 | __ cvtsi2sd(xmm0, Operand(ecx)); |
| 10975 | __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0); |
| 10976 | } else { |
| 10977 | __ push(ecx); |
| 10978 | __ fild_s(Operand(esp, 0)); |
| 10979 | __ pop(ecx); |
| 10980 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 10981 | } |
| 10982 | } else { |
| 10983 | UNIMPLEMENTED(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 10984 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10985 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10986 | // Return from the stub. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10987 | __ bind(&done); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10988 | __ StubReturn(1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 10989 | |
| 10990 | // Handle the slow case by jumping to the JavaScript builtin. |
| 10991 | __ bind(&slow); |
| 10992 | __ pop(ecx); // pop return address. |
| 10993 | __ push(eax); |
| 10994 | __ push(ecx); // push return address |
| 10995 | switch (op_) { |
| 10996 | case Token::SUB: |
| 10997 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 10998 | break; |
| 10999 | case Token::BIT_NOT: |
| 11000 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| 11001 | break; |
| 11002 | default: |
| 11003 | UNREACHABLE(); |
| 11004 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11005 | } |
| 11006 | |
| 11007 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11008 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11009 | // The key is in edx and the parameter count is in eax. |
| 11010 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11011 | // The displacement is used for skipping the frame pointer on the |
| 11012 | // stack. It is the offset of the last parameter (if any) relative |
| 11013 | // to the frame pointer. |
| 11014 | static const int kDisplacement = 1 * kPointerSize; |
| 11015 | |
| 11016 | // Check that the key is a smi. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11017 | Label slow; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11018 | __ test(edx, Immediate(kSmiTagMask)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11019 | __ j(not_zero, &slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11020 | |
| 11021 | // Check if the calling frame is an arguments adaptor frame. |
| 11022 | Label adaptor; |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11023 | __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 11024 | __ mov(ecx, Operand(ebx, StandardFrameConstants::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 11025 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11026 | __ j(equal, &adaptor); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11027 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11028 | // Check index against formal parameters count limit passed in |
| 11029 | // through register eax. Use unsigned comparison to get negative |
| 11030 | // check for free. |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11031 | __ cmp(edx, Operand(eax)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11032 | __ j(above_equal, &slow, not_taken); |
| 11033 | |
| 11034 | // Read the argument from the stack and return it. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11035 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); // shifting code depends on this |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11036 | __ lea(ebx, Operand(ebp, eax, times_2, 0)); |
| 11037 | __ neg(edx); |
| 11038 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11039 | __ ret(0); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11040 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11041 | // Arguments adaptor case: Check index against actual arguments |
| 11042 | // limit found in the arguments adaptor frame. Use unsigned |
| 11043 | // comparison to get negative check for free. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11044 | __ bind(&adaptor); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11045 | __ mov(ecx, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 11046 | __ cmp(edx, Operand(ecx)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11047 | __ j(above_equal, &slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11048 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11049 | // Read the argument from the stack and return it. |
| 11050 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); // shifting code depends on this |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11051 | __ lea(ebx, Operand(ebx, ecx, times_2, 0)); |
| 11052 | __ neg(edx); |
| 11053 | __ mov(eax, Operand(ebx, edx, times_2, kDisplacement)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11054 | __ ret(0); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11055 | |
| 11056 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 11057 | // by calling the runtime system. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11058 | __ bind(&slow); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 11059 | __ pop(ebx); // Return address. |
| 11060 | __ push(edx); |
| 11061 | __ push(ebx); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11062 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11063 | } |
| 11064 | |
| 11065 | |
| 11066 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11067 | // esp[0] : return address |
| 11068 | // esp[4] : number of parameters |
| 11069 | // esp[8] : receiver displacement |
| 11070 | // esp[16] : function |
| 11071 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11072 | // The displacement is used for skipping the return address and the |
| 11073 | // frame pointer on the stack. It is the offset of the last |
| 11074 | // parameter (if any) relative to the frame pointer. |
| 11075 | static const int kDisplacement = 2 * kPointerSize; |
| 11076 | |
| 11077 | // Check if the calling frame is an arguments adaptor frame. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11078 | Label adaptor_frame, try_allocate, runtime; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11079 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 11080 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 11081 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11082 | __ j(equal, &adaptor_frame); |
| 11083 | |
| 11084 | // Get the length from the frame. |
| 11085 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 11086 | __ jmp(&try_allocate); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11087 | |
| 11088 | // Patch the arguments.length and the parameters pointer. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11089 | __ bind(&adaptor_frame); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11090 | __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 11091 | __ mov(Operand(esp, 1 * kPointerSize), ecx); |
| 11092 | __ lea(edx, Operand(edx, ecx, times_2, kDisplacement)); |
| 11093 | __ mov(Operand(esp, 2 * kPointerSize), edx); |
| 11094 | |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11095 | // Try the new space allocation. Start out with computing the size of |
| 11096 | // the arguments object and the elements array. |
| 11097 | Label add_arguments_object; |
| 11098 | __ bind(&try_allocate); |
| 11099 | __ test(ecx, Operand(ecx)); |
| 11100 | __ j(zero, &add_arguments_object); |
| 11101 | __ lea(ecx, Operand(ecx, times_2, FixedArray::kHeaderSize)); |
| 11102 | __ bind(&add_arguments_object); |
| 11103 | __ add(Operand(ecx), Immediate(Heap::kArgumentsObjectSize)); |
| 11104 | |
| 11105 | // Do the allocation of both objects in one go. |
| 11106 | __ AllocateInNewSpace(ecx, eax, edx, ebx, &runtime, TAG_OBJECT); |
| 11107 | |
| 11108 | // Get the arguments boilerplate from the current (global) context. |
| 11109 | int offset = Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX); |
| 11110 | __ mov(edi, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 11111 | __ mov(edi, FieldOperand(edi, GlobalObject::kGlobalContextOffset)); |
| 11112 | __ mov(edi, Operand(edi, offset)); |
| 11113 | |
| 11114 | // Copy the JS object part. |
| 11115 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 11116 | __ mov(ebx, FieldOperand(edi, i)); |
| 11117 | __ mov(FieldOperand(eax, i), ebx); |
| 11118 | } |
| 11119 | |
| 11120 | // Setup the callee in-object property. |
| 11121 | ASSERT(Heap::arguments_callee_index == 0); |
| 11122 | __ mov(ebx, Operand(esp, 3 * kPointerSize)); |
| 11123 | __ mov(FieldOperand(eax, JSObject::kHeaderSize), ebx); |
| 11124 | |
| 11125 | // Get the length (smi tagged) and set that as an in-object property too. |
| 11126 | ASSERT(Heap::arguments_length_index == 1); |
| 11127 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 11128 | __ mov(FieldOperand(eax, JSObject::kHeaderSize + kPointerSize), ecx); |
| 11129 | |
| 11130 | // If there are no actual arguments, we're done. |
| 11131 | Label done; |
| 11132 | __ test(ecx, Operand(ecx)); |
| 11133 | __ j(zero, &done); |
| 11134 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 11135 | // Get the parameters pointer from the stack. |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11136 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11137 | |
| 11138 | // Setup the elements pointer in the allocated arguments object and |
| 11139 | // initialize the header in the elements fixed array. |
| 11140 | __ lea(edi, Operand(eax, Heap::kArgumentsObjectSize)); |
| 11141 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), edi); |
| 11142 | __ mov(FieldOperand(edi, FixedArray::kMapOffset), |
| 11143 | Immediate(Factory::fixed_array_map())); |
| 11144 | __ mov(FieldOperand(edi, FixedArray::kLengthOffset), ecx); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 11145 | // Untag the length for the loop below. |
| 11146 | __ SmiUntag(ecx); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11147 | |
| 11148 | // Copy the fixed array slots. |
| 11149 | Label loop; |
| 11150 | __ bind(&loop); |
| 11151 | __ mov(ebx, Operand(edx, -1 * kPointerSize)); // Skip receiver. |
| 11152 | __ mov(FieldOperand(edi, FixedArray::kHeaderSize), ebx); |
| 11153 | __ add(Operand(edi), Immediate(kPointerSize)); |
| 11154 | __ sub(Operand(edx), Immediate(kPointerSize)); |
| 11155 | __ dec(ecx); |
sgjesse@chromium.org | 846fb74 | 2009-12-18 08:56:33 +0000 | [diff] [blame] | 11156 | __ j(not_zero, &loop); |
| 11157 | |
| 11158 | // Return and remove the on-stack parameters. |
| 11159 | __ bind(&done); |
| 11160 | __ ret(3 * kPointerSize); |
| 11161 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11162 | // Do the runtime call to allocate the arguments object. |
| 11163 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11164 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11165 | } |
| 11166 | |
| 11167 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11168 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11169 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 11170 | // time or if regexp entry in generated code is turned off runtime switch or |
| 11171 | // at compilation. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11172 | #ifdef V8_INTERPRETED_REGEXP |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11173 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11174 | #else // V8_INTERPRETED_REGEXP |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11175 | if (!FLAG_regexp_entry_native) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11176 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11177 | return; |
| 11178 | } |
| 11179 | |
| 11180 | // Stack frame on entry. |
| 11181 | // esp[0]: return address |
| 11182 | // esp[4]: last_match_info (expected JSArray) |
| 11183 | // esp[8]: previous index |
| 11184 | // esp[12]: subject string |
| 11185 | // esp[16]: JSRegExp object |
| 11186 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11187 | static const int kLastMatchInfoOffset = 1 * kPointerSize; |
| 11188 | static const int kPreviousIndexOffset = 2 * kPointerSize; |
| 11189 | static const int kSubjectOffset = 3 * kPointerSize; |
| 11190 | static const int kJSRegExpOffset = 4 * kPointerSize; |
| 11191 | |
| 11192 | Label runtime, invoke_regexp; |
| 11193 | |
| 11194 | // Ensure that a RegExp stack is allocated. |
| 11195 | ExternalReference address_of_regexp_stack_memory_address = |
| 11196 | ExternalReference::address_of_regexp_stack_memory_address(); |
| 11197 | ExternalReference address_of_regexp_stack_memory_size = |
| 11198 | ExternalReference::address_of_regexp_stack_memory_size(); |
| 11199 | __ mov(ebx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
| 11200 | __ test(ebx, Operand(ebx)); |
| 11201 | __ j(zero, &runtime, not_taken); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11202 | |
| 11203 | // Check that the first argument is a JSRegExp object. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11204 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11205 | ASSERT_EQ(0, kSmiTag); |
| 11206 | __ test(eax, Immediate(kSmiTagMask)); |
| 11207 | __ j(zero, &runtime); |
| 11208 | __ CmpObjectType(eax, JS_REGEXP_TYPE, ecx); |
| 11209 | __ j(not_equal, &runtime); |
| 11210 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 11211 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11212 | if (FLAG_debug_code) { |
| 11213 | __ test(ecx, Immediate(kSmiTagMask)); |
| 11214 | __ Check(not_zero, "Unexpected type for RegExp data, FixedArray expected"); |
| 11215 | __ CmpObjectType(ecx, FIXED_ARRAY_TYPE, ebx); |
| 11216 | __ Check(equal, "Unexpected type for RegExp data, FixedArray expected"); |
| 11217 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11218 | |
| 11219 | // ecx: RegExp data (FixedArray) |
| 11220 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 11221 | __ mov(ebx, FieldOperand(ecx, JSRegExp::kDataTagOffset)); |
| 11222 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 11223 | __ j(not_equal, &runtime); |
| 11224 | |
| 11225 | // ecx: RegExp data (FixedArray) |
| 11226 | // Check that the number of captures fit in the static offsets vector buffer. |
| 11227 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 11228 | // Calculate number of capture registers (number_of_captures + 1) * 2. This |
| 11229 | // uses the asumption that smis are 2 * their untagged value. |
| 11230 | ASSERT_EQ(0, kSmiTag); |
| 11231 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| 11232 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 11233 | // Check that the static offsets vector buffer is large enough. |
| 11234 | __ cmp(edx, OffsetsVector::kStaticOffsetsVectorSize); |
| 11235 | __ j(above, &runtime); |
| 11236 | |
| 11237 | // ecx: RegExp data (FixedArray) |
| 11238 | // edx: Number of capture registers |
| 11239 | // Check that the second argument is a string. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11240 | __ mov(eax, Operand(esp, kSubjectOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11241 | __ test(eax, Immediate(kSmiTagMask)); |
| 11242 | __ j(zero, &runtime); |
| 11243 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 11244 | __ j(NegateCondition(is_string), &runtime); |
| 11245 | // Get the length of the string to ebx. |
| 11246 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
| 11247 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 11248 | // ebx: Length of subject string as a smi |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11249 | // ecx: RegExp data (FixedArray) |
| 11250 | // edx: Number of capture registers |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11251 | // Check that the third argument is a positive smi less than the subject |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11252 | // string length. A negative value will be greater (unsigned comparison). |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11253 | __ mov(eax, Operand(esp, kPreviousIndexOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 11254 | __ test(eax, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 11255 | __ j(not_zero, &runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11256 | __ cmp(eax, Operand(ebx)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 11257 | __ j(above_equal, &runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11258 | |
| 11259 | // ecx: RegExp data (FixedArray) |
| 11260 | // edx: Number of capture registers |
| 11261 | // Check that the fourth object is a JSArray object. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11262 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11263 | __ test(eax, Immediate(kSmiTagMask)); |
| 11264 | __ j(zero, &runtime); |
| 11265 | __ CmpObjectType(eax, JS_ARRAY_TYPE, ebx); |
| 11266 | __ j(not_equal, &runtime); |
| 11267 | // Check that the JSArray is in fast case. |
| 11268 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 11269 | __ mov(eax, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 11270 | __ cmp(eax, Factory::fixed_array_map()); |
| 11271 | __ j(not_equal, &runtime); |
| 11272 | // Check that the last match info has space for the capture registers and the |
| 11273 | // additional information. |
| 11274 | __ mov(eax, FieldOperand(ebx, FixedArray::kLengthOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 11275 | __ SmiUntag(eax); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11276 | __ add(Operand(edx), Immediate(RegExpImpl::kLastMatchOverhead)); |
| 11277 | __ cmp(edx, Operand(eax)); |
| 11278 | __ j(greater, &runtime); |
| 11279 | |
| 11280 | // ecx: RegExp data (FixedArray) |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11281 | // Check the representation and encoding of the subject string. |
| 11282 | Label seq_string, seq_two_byte_string, check_code; |
| 11283 | const int kStringRepresentationEncodingMask = |
| 11284 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 11285 | __ mov(eax, Operand(esp, kSubjectOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11286 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 11287 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11288 | __ and_(ebx, kStringRepresentationEncodingMask); |
| 11289 | // First check for sequential string. |
| 11290 | ASSERT_EQ(0, kStringTag); |
| 11291 | ASSERT_EQ(0, kSeqStringTag); |
| 11292 | __ test(Operand(ebx), |
| 11293 | Immediate(kIsNotStringMask | kStringRepresentationMask)); |
| 11294 | __ j(zero, &seq_string); |
| 11295 | |
| 11296 | // Check for flat cons string. |
| 11297 | // A flat cons string is a cons string where the second part is the empty |
| 11298 | // string. In that case the subject string is just the first part of the cons |
| 11299 | // string. Also in this case the first part of the cons string is known to be |
| 11300 | // a sequential string or an external string. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11301 | __ and_(ebx, kStringRepresentationMask); |
| 11302 | __ cmp(ebx, kConsStringTag); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11303 | __ j(not_equal, &runtime); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11304 | __ mov(edx, FieldOperand(eax, ConsString::kSecondOffset)); |
| 11305 | __ cmp(Operand(edx), Factory::empty_string()); |
| 11306 | __ j(not_equal, &runtime); |
| 11307 | __ mov(eax, FieldOperand(eax, ConsString::kFirstOffset)); |
| 11308 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 11309 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 11310 | ASSERT_EQ(0, kSeqStringTag); |
| 11311 | __ test(ebx, Immediate(kStringRepresentationMask)); |
| 11312 | __ j(not_zero, &runtime); |
| 11313 | __ and_(ebx, kStringRepresentationEncodingMask); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11314 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11315 | __ bind(&seq_string); |
| 11316 | // eax: subject string (sequential either ascii to two byte) |
| 11317 | // ebx: suject string type & kStringRepresentationEncodingMask |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11318 | // ecx: RegExp data (FixedArray) |
| 11319 | // Check that the irregexp code has been generated for an ascii string. If |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11320 | // it has, the field contains a code object otherwise it contains the hole. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11321 | const int kSeqTwoByteString = kStringTag | kSeqStringTag | kTwoByteStringTag; |
| 11322 | __ cmp(ebx, kSeqTwoByteString); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11323 | __ j(equal, &seq_two_byte_string); |
| 11324 | if (FLAG_debug_code) { |
| 11325 | __ cmp(ebx, kStringTag | kSeqStringTag | kAsciiStringTag); |
| 11326 | __ Check(equal, "Expected sequential ascii string"); |
| 11327 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11328 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataAsciiCodeOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11329 | __ Set(edi, Immediate(1)); // Type is ascii. |
| 11330 | __ jmp(&check_code); |
| 11331 | |
| 11332 | __ bind(&seq_two_byte_string); |
| 11333 | // eax: subject string |
| 11334 | // ecx: RegExp data (FixedArray) |
| 11335 | __ mov(edx, FieldOperand(ecx, JSRegExp::kDataUC16CodeOffset)); |
| 11336 | __ Set(edi, Immediate(0)); // Type is two byte. |
| 11337 | |
| 11338 | __ bind(&check_code); |
| 11339 | // Check that the irregexp code has been generated for the actual string |
| 11340 | // encoding. If it has, the field contains a code object otherwise it contains |
| 11341 | // the hole. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11342 | __ CmpObjectType(edx, CODE_TYPE, ebx); |
| 11343 | __ j(not_equal, &runtime); |
| 11344 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11345 | // eax: subject string |
| 11346 | // edx: code |
| 11347 | // edi: encoding of subject string (1 if ascii, 0 if two_byte); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11348 | // Load used arguments before starting to push arguments for call to native |
| 11349 | // RegExp code to avoid handling changing stack height. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11350 | __ mov(ebx, Operand(esp, kPreviousIndexOffset)); |
| 11351 | __ SmiUntag(ebx); // Previous index from smi. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11352 | |
| 11353 | // eax: subject string |
| 11354 | // ebx: previous index |
| 11355 | // edx: code |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11356 | // edi: encoding of subject string (1 if ascii 0 if two_byte); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11357 | // All checks done. Now push arguments for native regexp code. |
| 11358 | __ IncrementCounter(&Counters::regexp_entry_native, 1); |
| 11359 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11360 | static const int kRegExpExecuteArguments = 7; |
| 11361 | __ PrepareCallCFunction(kRegExpExecuteArguments, ecx); |
| 11362 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11363 | // Argument 7: Indicate that this is a direct call from JavaScript. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11364 | __ mov(Operand(esp, 6 * kPointerSize), Immediate(1)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11365 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11366 | // Argument 6: Start (high end) of backtracking stack memory area. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11367 | __ mov(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_address)); |
| 11368 | __ add(ecx, Operand::StaticVariable(address_of_regexp_stack_memory_size)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11369 | __ mov(Operand(esp, 5 * kPointerSize), ecx); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11370 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11371 | // Argument 5: static offsets vector buffer. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11372 | __ mov(Operand(esp, 4 * kPointerSize), |
| 11373 | Immediate(ExternalReference::address_of_static_offsets_vector())); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11374 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11375 | // Argument 4: End of string data |
| 11376 | // Argument 3: Start of string data |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11377 | Label setup_two_byte, setup_rest; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11378 | __ test(edi, Operand(edi)); |
| 11379 | __ mov(edi, FieldOperand(eax, String::kLengthOffset)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11380 | __ j(zero, &setup_two_byte); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 11381 | __ SmiUntag(edi); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11382 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqAsciiString::kHeaderSize)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11383 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11384 | __ lea(ecx, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11385 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
| 11386 | __ jmp(&setup_rest); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11387 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11388 | __ bind(&setup_two_byte); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 11389 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); // edi is smi (powered by 2). |
| 11390 | __ lea(ecx, FieldOperand(eax, edi, times_1, SeqTwoByteString::kHeaderSize)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11391 | __ mov(Operand(esp, 3 * kPointerSize), ecx); // Argument 4. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11392 | __ lea(ecx, FieldOperand(eax, ebx, times_2, SeqTwoByteString::kHeaderSize)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11393 | __ mov(Operand(esp, 2 * kPointerSize), ecx); // Argument 3. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11394 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11395 | __ bind(&setup_rest); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11396 | |
| 11397 | // Argument 2: Previous index. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11398 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11399 | |
| 11400 | // Argument 1: Subject string. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11401 | __ mov(Operand(esp, 0 * kPointerSize), eax); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11402 | |
| 11403 | // Locate the code entry and call it. |
| 11404 | __ add(Operand(edx), Immediate(Code::kHeaderSize - kHeapObjectTag)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11405 | __ CallCFunction(edx, kRegExpExecuteArguments); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11406 | |
| 11407 | // Check the result. |
| 11408 | Label success; |
| 11409 | __ cmp(eax, NativeRegExpMacroAssembler::SUCCESS); |
| 11410 | __ j(equal, &success, taken); |
| 11411 | Label failure; |
| 11412 | __ cmp(eax, NativeRegExpMacroAssembler::FAILURE); |
| 11413 | __ j(equal, &failure, taken); |
| 11414 | __ cmp(eax, NativeRegExpMacroAssembler::EXCEPTION); |
| 11415 | // If not exception it can only be retry. Handle that in the runtime system. |
| 11416 | __ j(not_equal, &runtime); |
| 11417 | // Result must now be exception. If there is no pending exception already a |
| 11418 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 11419 | // haven't created the exception yet. Handle that in the runtime system. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11420 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11421 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 11422 | __ mov(eax, |
| 11423 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 11424 | __ cmp(eax, Operand::StaticVariable(pending_exception)); |
| 11425 | __ j(equal, &runtime); |
| 11426 | __ bind(&failure); |
| 11427 | // For failure and exception return null. |
| 11428 | __ mov(Operand(eax), Factory::null_value()); |
| 11429 | __ ret(4 * kPointerSize); |
| 11430 | |
| 11431 | // Load RegExp data. |
| 11432 | __ bind(&success); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11433 | __ mov(eax, Operand(esp, kJSRegExpOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11434 | __ mov(ecx, FieldOperand(eax, JSRegExp::kDataOffset)); |
| 11435 | __ mov(edx, FieldOperand(ecx, JSRegExp::kIrregexpCaptureCountOffset)); |
| 11436 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11437 | ASSERT_EQ(0, kSmiTag); |
| 11438 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11439 | __ add(Operand(edx), Immediate(2)); // edx was a smi. |
| 11440 | |
| 11441 | // edx: Number of capture registers |
| 11442 | // Load last_match_info which is still known to be a fast case JSArray. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11443 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11444 | __ mov(ebx, FieldOperand(eax, JSArray::kElementsOffset)); |
| 11445 | |
| 11446 | // ebx: last_match_info backing store (FixedArray) |
| 11447 | // edx: number of capture registers |
| 11448 | // Store the capture count. |
| 11449 | __ SmiTag(edx); // Number of capture registers to smi. |
| 11450 | __ mov(FieldOperand(ebx, RegExpImpl::kLastCaptureCountOffset), edx); |
| 11451 | __ SmiUntag(edx); // Number of capture registers back from smi. |
| 11452 | // Store last subject and last input. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11453 | __ mov(eax, Operand(esp, kSubjectOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11454 | __ mov(FieldOperand(ebx, RegExpImpl::kLastSubjectOffset), eax); |
| 11455 | __ mov(ecx, ebx); |
| 11456 | __ RecordWrite(ecx, RegExpImpl::kLastSubjectOffset, eax, edi); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11457 | __ mov(eax, Operand(esp, kSubjectOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11458 | __ mov(FieldOperand(ebx, RegExpImpl::kLastInputOffset), eax); |
| 11459 | __ mov(ecx, ebx); |
| 11460 | __ RecordWrite(ecx, RegExpImpl::kLastInputOffset, eax, edi); |
| 11461 | |
| 11462 | // Get the static offsets vector filled by the native regexp code. |
| 11463 | ExternalReference address_of_static_offsets_vector = |
| 11464 | ExternalReference::address_of_static_offsets_vector(); |
| 11465 | __ mov(ecx, Immediate(address_of_static_offsets_vector)); |
| 11466 | |
| 11467 | // ebx: last_match_info backing store (FixedArray) |
| 11468 | // ecx: offsets vector |
| 11469 | // edx: number of capture registers |
| 11470 | Label next_capture, done; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11471 | // Capture register counter starts from number of capture registers and |
| 11472 | // counts down until wraping after zero. |
| 11473 | __ bind(&next_capture); |
| 11474 | __ sub(Operand(edx), Immediate(1)); |
| 11475 | __ j(negative, &done); |
| 11476 | // Read the value from the static offsets vector buffer. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11477 | __ mov(edi, Operand(ecx, edx, times_int_size, 0)); |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 11478 | __ SmiTag(edi); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11479 | // Store the smi value in the last match info. |
| 11480 | __ mov(FieldOperand(ebx, |
| 11481 | edx, |
| 11482 | times_pointer_size, |
| 11483 | RegExpImpl::kFirstCaptureOffset), |
| 11484 | edi); |
| 11485 | __ jmp(&next_capture); |
| 11486 | __ bind(&done); |
| 11487 | |
| 11488 | // Return last match info. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11489 | __ mov(eax, Operand(esp, kLastMatchInfoOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11490 | __ ret(4 * kPointerSize); |
| 11491 | |
| 11492 | // Do the runtime call to execute the regexp. |
| 11493 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11494 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 11495 | #endif // V8_INTERPRETED_REGEXP |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11496 | } |
| 11497 | |
| 11498 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11499 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 11500 | Register object, |
| 11501 | Register result, |
| 11502 | Register scratch1, |
| 11503 | Register scratch2, |
| 11504 | bool object_is_smi, |
| 11505 | Label* not_found) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11506 | // Use of registers. Register result is used as a temporary. |
| 11507 | Register number_string_cache = result; |
| 11508 | Register mask = scratch1; |
| 11509 | Register scratch = scratch2; |
| 11510 | |
| 11511 | // Load the number string cache. |
| 11512 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 11513 | __ mov(scratch, Immediate(Heap::kNumberStringCacheRootIndex)); |
| 11514 | __ mov(number_string_cache, |
| 11515 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 11516 | // Make the hash mask from the length of the number string cache. It |
| 11517 | // contains two elements (number and string) for each cache entry. |
| 11518 | __ mov(mask, FieldOperand(number_string_cache, FixedArray::kLengthOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 11519 | __ shr(mask, kSmiTagSize + 1); // Untag length and divide it by two. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11520 | __ sub(Operand(mask), Immediate(1)); // Make mask. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11521 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11522 | // Calculate the entry in the number string cache. The hash value in the |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11523 | // number string cache for smis is just the smi value, and the hash for |
| 11524 | // doubles is the xor of the upper and lower words. See |
| 11525 | // Heap::GetNumberStringCache. |
| 11526 | Label smi_hash_calculated; |
| 11527 | Label load_result_from_cache; |
| 11528 | if (object_is_smi) { |
| 11529 | __ mov(scratch, object); |
| 11530 | __ SmiUntag(scratch); |
| 11531 | } else { |
| 11532 | Label not_smi, hash_calculated; |
| 11533 | ASSERT(kSmiTag == 0); |
| 11534 | __ test(object, Immediate(kSmiTagMask)); |
| 11535 | __ j(not_zero, ¬_smi); |
| 11536 | __ mov(scratch, object); |
| 11537 | __ SmiUntag(scratch); |
| 11538 | __ jmp(&smi_hash_calculated); |
| 11539 | __ bind(¬_smi); |
| 11540 | __ cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 11541 | Factory::heap_number_map()); |
| 11542 | __ j(not_equal, not_found); |
| 11543 | ASSERT_EQ(8, kDoubleSize); |
| 11544 | __ mov(scratch, FieldOperand(object, HeapNumber::kValueOffset)); |
| 11545 | __ xor_(scratch, FieldOperand(object, HeapNumber::kValueOffset + 4)); |
| 11546 | // Object is heap number and hash is now in scratch. Calculate cache index. |
| 11547 | __ and_(scratch, Operand(mask)); |
| 11548 | Register index = scratch; |
| 11549 | Register probe = mask; |
| 11550 | __ mov(probe, |
| 11551 | FieldOperand(number_string_cache, |
| 11552 | index, |
| 11553 | times_twice_pointer_size, |
| 11554 | FixedArray::kHeaderSize)); |
| 11555 | __ test(probe, Immediate(kSmiTagMask)); |
| 11556 | __ j(zero, not_found); |
| 11557 | if (CpuFeatures::IsSupported(SSE2)) { |
| 11558 | CpuFeatures::Scope fscope(SSE2); |
| 11559 | __ movdbl(xmm0, FieldOperand(object, HeapNumber::kValueOffset)); |
| 11560 | __ movdbl(xmm1, FieldOperand(probe, HeapNumber::kValueOffset)); |
| 11561 | __ comisd(xmm0, xmm1); |
| 11562 | } else { |
| 11563 | __ fld_d(FieldOperand(object, HeapNumber::kValueOffset)); |
| 11564 | __ fld_d(FieldOperand(probe, HeapNumber::kValueOffset)); |
| 11565 | __ FCmp(); |
| 11566 | } |
| 11567 | __ j(parity_even, not_found); // Bail out if NaN is involved. |
| 11568 | __ j(not_equal, not_found); // The cache did not contain this value. |
| 11569 | __ jmp(&load_result_from_cache); |
| 11570 | } |
| 11571 | |
| 11572 | __ bind(&smi_hash_calculated); |
| 11573 | // Object is smi and hash is now in scratch. Calculate cache index. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11574 | __ and_(scratch, Operand(mask)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11575 | Register index = scratch; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11576 | // Check if the entry is the smi we are looking for. |
| 11577 | __ cmp(object, |
| 11578 | FieldOperand(number_string_cache, |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11579 | index, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11580 | times_twice_pointer_size, |
| 11581 | FixedArray::kHeaderSize)); |
| 11582 | __ j(not_equal, not_found); |
| 11583 | |
| 11584 | // Get the result from the cache. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11585 | __ bind(&load_result_from_cache); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11586 | __ mov(result, |
| 11587 | FieldOperand(number_string_cache, |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11588 | index, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11589 | times_twice_pointer_size, |
| 11590 | FixedArray::kHeaderSize + kPointerSize)); |
| 11591 | __ IncrementCounter(&Counters::number_to_string_native, 1); |
| 11592 | } |
| 11593 | |
| 11594 | |
| 11595 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
| 11596 | Label runtime; |
| 11597 | |
| 11598 | __ mov(ebx, Operand(esp, kPointerSize)); |
| 11599 | |
| 11600 | // Generate code to lookup number in the number string cache. |
| 11601 | GenerateLookupNumberStringCache(masm, ebx, eax, ecx, edx, false, &runtime); |
| 11602 | __ ret(1 * kPointerSize); |
| 11603 | |
| 11604 | __ bind(&runtime); |
| 11605 | // Handle number to string in the runtime system if not found in the cache. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 11606 | __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11607 | } |
| 11608 | |
| 11609 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11610 | static int NegativeComparisonResult(Condition cc) { |
| 11611 | ASSERT(cc != equal); |
| 11612 | ASSERT((cc == less) || (cc == less_equal) |
| 11613 | || (cc == greater) || (cc == greater_equal)); |
| 11614 | return (cc == greater || cc == greater_equal) ? LESS : GREATER; |
| 11615 | } |
| 11616 | |
| 11617 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11618 | void CompareStub::Generate(MacroAssembler* masm) { |
| 11619 | Label call_builtin, done; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11620 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11621 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 11622 | // it is certain that at least one operand isn't a smi. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11623 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11624 | // Identical objects can be compared fast, but there are some tricky cases |
| 11625 | // for NaN and undefined. |
| 11626 | { |
| 11627 | Label not_identical; |
| 11628 | __ cmp(eax, Operand(edx)); |
| 11629 | __ j(not_equal, ¬_identical); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11630 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11631 | if (cc_ != equal) { |
| 11632 | // Check for undefined. undefined OP undefined is false even though |
| 11633 | // undefined == undefined. |
| 11634 | Label check_for_nan; |
| 11635 | __ cmp(edx, Factory::undefined_value()); |
| 11636 | __ j(not_equal, &check_for_nan); |
| 11637 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 11638 | __ ret(0); |
| 11639 | __ bind(&check_for_nan); |
| 11640 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11641 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11642 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| 11643 | // so we do the second best thing - test it ourselves. |
| 11644 | // Note: if cc_ != equal, never_nan_nan_ is not used. |
| 11645 | if (never_nan_nan_ && (cc_ == equal)) { |
| 11646 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 11647 | __ ret(0); |
| 11648 | } else { |
| 11649 | Label return_equal; |
| 11650 | Label heap_number; |
| 11651 | // If it's not a heap number, then return equal. |
| 11652 | __ cmp(FieldOperand(edx, HeapObject::kMapOffset), |
| 11653 | Immediate(Factory::heap_number_map())); |
| 11654 | __ j(equal, &heap_number); |
| 11655 | __ bind(&return_equal); |
| 11656 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 11657 | __ ret(0); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11658 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11659 | __ bind(&heap_number); |
| 11660 | // It is a heap number, so return non-equal if it's NaN and equal if |
| 11661 | // it's not NaN. |
| 11662 | // The representation of NaN values has all exponent bits (52..62) set, |
| 11663 | // and not all mantissa bits (0..51) clear. |
| 11664 | // We only accept QNaNs, which have bit 51 set. |
| 11665 | // Read top bits of double representation (second word of value). |
| 11666 | |
| 11667 | // Value is a QNaN if value & kQuietNaNMask == kQuietNaNMask, i.e., |
| 11668 | // all bits in the mask are set. We only need to check the word |
| 11669 | // that contains the exponent and high bit of the mantissa. |
| 11670 | ASSERT_NE(0, (kQuietNaNHighBitsMask << 1) & 0x80000000u); |
| 11671 | __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset)); |
| 11672 | __ xor_(eax, Operand(eax)); |
| 11673 | // Shift value and mask so kQuietNaNHighBitsMask applies to topmost |
| 11674 | // bits. |
| 11675 | __ add(edx, Operand(edx)); |
| 11676 | __ cmp(edx, kQuietNaNHighBitsMask << 1); |
| 11677 | if (cc_ == equal) { |
| 11678 | ASSERT_NE(1, EQUAL); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11679 | __ setcc(above_equal, eax); |
| 11680 | __ ret(0); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11681 | } else { |
| 11682 | Label nan; |
| 11683 | __ j(above_equal, &nan); |
| 11684 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
| 11685 | __ ret(0); |
| 11686 | __ bind(&nan); |
| 11687 | __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
| 11688 | __ ret(0); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11689 | } |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11690 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11691 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11692 | __ bind(¬_identical); |
| 11693 | } |
| 11694 | |
| 11695 | if (cc_ == equal) { // Both strict and non-strict. |
| 11696 | Label slow; // Fallthrough label. |
| 11697 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11698 | // If we're doing a strict equality comparison, we don't have to do |
| 11699 | // type conversion, so we generate code to do fast comparison for objects |
| 11700 | // and oddballs. Non-smi numbers and strings still go through the usual |
| 11701 | // slow-case code. |
| 11702 | if (strict_) { |
| 11703 | // If either is a Smi (we know that not both are), then they can only |
| 11704 | // be equal if the other is a HeapNumber. If so, use the slow case. |
| 11705 | { |
| 11706 | Label not_smis; |
| 11707 | ASSERT_EQ(0, kSmiTag); |
| 11708 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 11709 | __ mov(ecx, Immediate(kSmiTagMask)); |
| 11710 | __ and_(ecx, Operand(eax)); |
| 11711 | __ test(ecx, Operand(edx)); |
| 11712 | __ j(not_zero, ¬_smis); |
| 11713 | // One operand is a smi. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11714 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11715 | // Check whether the non-smi is a heap number. |
| 11716 | ASSERT_EQ(1, kSmiTagMask); |
| 11717 | // ecx still holds eax & kSmiTag, which is either zero or one. |
| 11718 | __ sub(Operand(ecx), Immediate(0x01)); |
| 11719 | __ mov(ebx, edx); |
| 11720 | __ xor_(ebx, Operand(eax)); |
| 11721 | __ and_(ebx, Operand(ecx)); // ebx holds either 0 or eax ^ edx. |
| 11722 | __ xor_(ebx, Operand(eax)); |
| 11723 | // if eax was smi, ebx is now edx, else eax. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11724 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11725 | // Check if the non-smi operand is a heap number. |
| 11726 | __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
| 11727 | Immediate(Factory::heap_number_map())); |
| 11728 | // If heap number, handle it in the slow case. |
| 11729 | __ j(equal, &slow); |
| 11730 | // Return non-equal (ebx is not zero) |
| 11731 | __ mov(eax, ebx); |
| 11732 | __ ret(0); |
| 11733 | |
| 11734 | __ bind(¬_smis); |
| 11735 | } |
| 11736 | |
| 11737 | // If either operand is a JSObject or an oddball value, then they are not |
| 11738 | // equal since their pointers are different |
| 11739 | // There is no test for undetectability in strict equality. |
| 11740 | |
| 11741 | // Get the type of the first operand. |
| 11742 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 11743 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 11744 | |
| 11745 | // If the first object is a JS object, we have done pointer comparison. |
| 11746 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 11747 | Label first_non_object; |
| 11748 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 11749 | __ j(below, &first_non_object); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11750 | |
| 11751 | // Return non-zero (eax is not zero) |
| 11752 | Label return_not_equal; |
| 11753 | ASSERT(kHeapObjectTag != 0); |
| 11754 | __ bind(&return_not_equal); |
| 11755 | __ ret(0); |
| 11756 | |
| 11757 | __ bind(&first_non_object); |
| 11758 | // Check for oddballs: true, false, null, undefined. |
| 11759 | __ cmp(ecx, ODDBALL_TYPE); |
| 11760 | __ j(equal, &return_not_equal); |
| 11761 | |
| 11762 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 11763 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 11764 | |
| 11765 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 11766 | __ j(above_equal, &return_not_equal); |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 11767 | |
| 11768 | // Check for oddballs: true, false, null, undefined. |
| 11769 | __ cmp(ecx, ODDBALL_TYPE); |
| 11770 | __ j(equal, &return_not_equal); |
| 11771 | |
| 11772 | // Fall through to the general case. |
| 11773 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 11774 | __ bind(&slow); |
| 11775 | } |
| 11776 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 11777 | // Push arguments below the return address. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11778 | __ pop(ecx); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11779 | __ push(eax); |
| 11780 | __ push(edx); |
| 11781 | __ push(ecx); |
| 11782 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11783 | // Generate the number comparison code. |
| 11784 | if (include_number_compare_) { |
| 11785 | Label non_number_comparison; |
| 11786 | Label unordered; |
| 11787 | if (CpuFeatures::IsSupported(SSE2)) { |
| 11788 | CpuFeatures::Scope use_sse2(SSE2); |
| 11789 | CpuFeatures::Scope use_cmov(CMOV); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11790 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11791 | FloatingPointHelper::LoadSSE2Operands(masm, &non_number_comparison); |
| 11792 | __ comisd(xmm0, xmm1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11793 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11794 | // Don't base result on EFLAGS when a NaN is involved. |
| 11795 | __ j(parity_even, &unordered, not_taken); |
| 11796 | // Return a result of -1, 0, or 1, based on EFLAGS. |
| 11797 | __ mov(eax, 0); // equal |
| 11798 | __ mov(ecx, Immediate(Smi::FromInt(1))); |
| 11799 | __ cmov(above, eax, Operand(ecx)); |
| 11800 | __ mov(ecx, Immediate(Smi::FromInt(-1))); |
| 11801 | __ cmov(below, eax, Operand(ecx)); |
| 11802 | __ ret(2 * kPointerSize); |
| 11803 | } else { |
| 11804 | FloatingPointHelper::CheckFloatOperands( |
| 11805 | masm, &non_number_comparison, ebx); |
| 11806 | FloatingPointHelper::LoadFloatOperands(masm, ecx); |
| 11807 | __ FCmp(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11808 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11809 | // Don't base result on EFLAGS when a NaN is involved. |
| 11810 | __ j(parity_even, &unordered, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11811 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11812 | Label below_label, above_label; |
| 11813 | // Return a result of -1, 0, or 1, based on EFLAGS. In all cases remove |
| 11814 | // two arguments from the stack as they have been pushed in preparation |
| 11815 | // of a possible runtime call. |
| 11816 | __ j(below, &below_label, not_taken); |
| 11817 | __ j(above, &above_label, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11818 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11819 | __ xor_(eax, Operand(eax)); |
| 11820 | __ ret(2 * kPointerSize); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 11821 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11822 | __ bind(&below_label); |
| 11823 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 11824 | __ ret(2 * kPointerSize); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 11825 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11826 | __ bind(&above_label); |
| 11827 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 11828 | __ ret(2 * kPointerSize); |
| 11829 | } |
| 11830 | |
| 11831 | // If one of the numbers was NaN, then the result is always false. |
| 11832 | // The cc is never not-equal. |
| 11833 | __ bind(&unordered); |
| 11834 | ASSERT(cc_ != not_equal); |
| 11835 | if (cc_ == less || cc_ == less_equal) { |
| 11836 | __ mov(eax, Immediate(Smi::FromInt(1))); |
| 11837 | } else { |
| 11838 | __ mov(eax, Immediate(Smi::FromInt(-1))); |
| 11839 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 11840 | __ ret(2 * kPointerSize); // eax, edx were pushed |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 11841 | |
| 11842 | // The number comparison code did not provide a valid result. |
| 11843 | __ bind(&non_number_comparison); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 11844 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11845 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 11846 | // Fast negative check for symbol-to-symbol equality. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11847 | Label check_for_strings; |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 11848 | if (cc_ == equal) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11849 | BranchIfNonSymbol(masm, &check_for_strings, eax, ecx); |
| 11850 | BranchIfNonSymbol(masm, &check_for_strings, edx, ecx); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 11851 | |
| 11852 | // We've already checked for object identity, so if both operands |
| 11853 | // are symbols they aren't equal. Register eax already holds a |
| 11854 | // non-zero value, which indicates not equal, so just return. |
| 11855 | __ ret(2 * kPointerSize); |
| 11856 | } |
| 11857 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11858 | __ bind(&check_for_strings); |
| 11859 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11860 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, &call_builtin); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 11861 | |
| 11862 | // Inline comparison of ascii strings. |
| 11863 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 11864 | edx, |
| 11865 | eax, |
| 11866 | ecx, |
| 11867 | ebx, |
| 11868 | edi); |
| 11869 | #ifdef DEBUG |
| 11870 | __ Abort("Unexpected fall-through from string comparison"); |
| 11871 | #endif |
| 11872 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11873 | __ bind(&call_builtin); |
| 11874 | // must swap argument order |
| 11875 | __ pop(ecx); |
| 11876 | __ pop(edx); |
| 11877 | __ pop(eax); |
| 11878 | __ push(edx); |
| 11879 | __ push(eax); |
| 11880 | |
| 11881 | // Figure out which native to call and setup the arguments. |
| 11882 | Builtins::JavaScript builtin; |
| 11883 | if (cc_ == equal) { |
| 11884 | builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 11885 | } else { |
| 11886 | builtin = Builtins::COMPARE; |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 11887 | __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc_)))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11888 | } |
| 11889 | |
| 11890 | // Restore return address on the stack. |
| 11891 | __ push(ecx); |
| 11892 | |
| 11893 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 11894 | // tagged as a small integer. |
| 11895 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 11896 | } |
| 11897 | |
| 11898 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 11899 | void CompareStub::BranchIfNonSymbol(MacroAssembler* masm, |
| 11900 | Label* label, |
| 11901 | Register object, |
| 11902 | Register scratch) { |
| 11903 | __ test(object, Immediate(kSmiTagMask)); |
| 11904 | __ j(zero, label); |
| 11905 | __ mov(scratch, FieldOperand(object, HeapObject::kMapOffset)); |
| 11906 | __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset)); |
| 11907 | __ and_(scratch, kIsSymbolMask | kIsNotStringMask); |
| 11908 | __ cmp(scratch, kSymbolTag | kStringTag); |
| 11909 | __ j(not_equal, label); |
| 11910 | } |
| 11911 | |
| 11912 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11913 | void StackCheckStub::Generate(MacroAssembler* masm) { |
| 11914 | // Because builtins always remove the receiver from the stack, we |
| 11915 | // have to fake one to avoid underflowing the stack. The receiver |
| 11916 | // must be inserted below the return address on the stack so we |
| 11917 | // temporarily store that in a register. |
| 11918 | __ pop(eax); |
| 11919 | __ push(Immediate(Smi::FromInt(0))); |
| 11920 | __ push(eax); |
| 11921 | |
| 11922 | // Do tail-call to runtime routine. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 11923 | __ TailCallRuntime(Runtime::kStackGuard, 1, 1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11924 | } |
| 11925 | |
| 11926 | |
| 11927 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 11928 | Label slow; |
| 11929 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 11930 | // If the receiver might be a value (string, number or boolean) check for this |
| 11931 | // and box it if it is. |
| 11932 | if (ReceiverMightBeValue()) { |
| 11933 | // Get the receiver from the stack. |
| 11934 | // +1 ~ return address |
| 11935 | Label receiver_is_value, receiver_is_js_object; |
| 11936 | __ mov(eax, Operand(esp, (argc_ + 1) * kPointerSize)); |
| 11937 | |
| 11938 | // Check if receiver is a smi (which is a number value). |
| 11939 | __ test(eax, Immediate(kSmiTagMask)); |
| 11940 | __ j(zero, &receiver_is_value, not_taken); |
| 11941 | |
| 11942 | // Check if the receiver is a valid JS object. |
| 11943 | __ CmpObjectType(eax, FIRST_JS_OBJECT_TYPE, edi); |
| 11944 | __ j(above_equal, &receiver_is_js_object); |
| 11945 | |
| 11946 | // Call the runtime to box the value. |
| 11947 | __ bind(&receiver_is_value); |
| 11948 | __ EnterInternalFrame(); |
| 11949 | __ push(eax); |
| 11950 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 11951 | __ LeaveInternalFrame(); |
| 11952 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), eax); |
| 11953 | |
| 11954 | __ bind(&receiver_is_js_object); |
| 11955 | } |
| 11956 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11957 | // Get the function to call from the stack. |
| 11958 | // +2 ~ receiver, return address |
| 11959 | __ mov(edi, Operand(esp, (argc_ + 2) * kPointerSize)); |
| 11960 | |
| 11961 | // Check that the function really is a JavaScript function. |
| 11962 | __ test(edi, Immediate(kSmiTagMask)); |
| 11963 | __ j(zero, &slow, not_taken); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 11964 | // Goto slow case if we do not have a function. |
| 11965 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11966 | __ j(not_equal, &slow, not_taken); |
| 11967 | |
| 11968 | // Fast-case: Just invoke the function. |
| 11969 | ParameterCount actual(argc_); |
| 11970 | __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| 11971 | |
| 11972 | // Slow-case: Non-function called. |
| 11973 | __ bind(&slow); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 11974 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 11975 | // of the original receiver from the call site). |
| 11976 | __ mov(Operand(esp, (argc_ + 1) * kPointerSize), edi); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 11977 | __ Set(eax, Immediate(argc_)); |
| 11978 | __ Set(ebx, Immediate(0)); |
| 11979 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
| 11980 | Handle<Code> adaptor(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 11981 | __ jmp(adaptor, RelocInfo::CODE_TARGET); |
| 11982 | } |
| 11983 | |
| 11984 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 11985 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 11986 | // eax holds the exception. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 11987 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 11988 | // Adjust this code if not the case. |
| 11989 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 11990 | |
| 11991 | // Drop the sp to the top of the handler. |
| 11992 | ExternalReference handler_address(Top::k_handler_address); |
| 11993 | __ mov(esp, Operand::StaticVariable(handler_address)); |
| 11994 | |
| 11995 | // Restore next handler and frame pointer, discard handler state. |
| 11996 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 11997 | __ pop(Operand::StaticVariable(handler_address)); |
| 11998 | ASSERT(StackHandlerConstants::kFPOffset == 1 * kPointerSize); |
| 11999 | __ pop(ebp); |
| 12000 | __ pop(edx); // Remove state. |
| 12001 | |
| 12002 | // Before returning we restore the context from the frame pointer if |
| 12003 | // not NULL. The frame pointer is NULL in the exception handler of |
| 12004 | // a JS entry frame. |
| 12005 | __ xor_(esi, Operand(esi)); // Tentatively set context pointer to NULL. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12006 | Label skip; |
| 12007 | __ cmp(ebp, 0); |
| 12008 | __ j(equal, &skip, not_taken); |
| 12009 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 12010 | __ bind(&skip); |
| 12011 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12012 | ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12013 | __ ret(0); |
| 12014 | } |
| 12015 | |
| 12016 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 12017 | // If true, a Handle<T> passed by value is passed and returned by |
| 12018 | // using the location_ field directly. If false, it is passed and |
| 12019 | // returned as a pointer to a handle. |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 12020 | #ifdef USING_BSD_ABI |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 12021 | static const bool kPassHandlesDirectly = true; |
| 12022 | #else |
| 12023 | static const bool kPassHandlesDirectly = false; |
| 12024 | #endif |
| 12025 | |
| 12026 | |
| 12027 | void ApiGetterEntryStub::Generate(MacroAssembler* masm) { |
| 12028 | Label get_result; |
| 12029 | Label prologue; |
| 12030 | Label promote_scheduled_exception; |
| 12031 | __ EnterApiExitFrame(ExitFrame::MODE_NORMAL, kStackSpace, kArgc); |
| 12032 | ASSERT_EQ(kArgc, 4); |
| 12033 | if (kPassHandlesDirectly) { |
| 12034 | // When handles as passed directly we don't have to allocate extra |
| 12035 | // space for and pass an out parameter. |
| 12036 | __ mov(Operand(esp, 0 * kPointerSize), ebx); // name. |
| 12037 | __ mov(Operand(esp, 1 * kPointerSize), eax); // arguments pointer. |
| 12038 | } else { |
| 12039 | // The function expects three arguments to be passed but we allocate |
| 12040 | // four to get space for the output cell. The argument slots are filled |
| 12041 | // as follows: |
| 12042 | // |
| 12043 | // 3: output cell |
| 12044 | // 2: arguments pointer |
| 12045 | // 1: name |
| 12046 | // 0: pointer to the output cell |
| 12047 | // |
| 12048 | // Note that this is one more "argument" than the function expects |
| 12049 | // so the out cell will have to be popped explicitly after returning |
| 12050 | // from the function. |
| 12051 | __ mov(Operand(esp, 1 * kPointerSize), ebx); // name. |
| 12052 | __ mov(Operand(esp, 2 * kPointerSize), eax); // arguments pointer. |
| 12053 | __ mov(ebx, esp); |
| 12054 | __ add(Operand(ebx), Immediate(3 * kPointerSize)); |
| 12055 | __ mov(Operand(esp, 0 * kPointerSize), ebx); // output |
| 12056 | __ mov(Operand(esp, 3 * kPointerSize), Immediate(0)); // out cell. |
| 12057 | } |
| 12058 | // Call the api function! |
| 12059 | __ call(fun()->address(), RelocInfo::RUNTIME_ENTRY); |
| 12060 | // Check if the function scheduled an exception. |
| 12061 | ExternalReference scheduled_exception_address = |
| 12062 | ExternalReference::scheduled_exception_address(); |
| 12063 | __ cmp(Operand::StaticVariable(scheduled_exception_address), |
| 12064 | Immediate(Factory::the_hole_value())); |
| 12065 | __ j(not_equal, &promote_scheduled_exception, not_taken); |
| 12066 | if (!kPassHandlesDirectly) { |
| 12067 | // The returned value is a pointer to the handle holding the result. |
| 12068 | // Dereference this to get to the location. |
| 12069 | __ mov(eax, Operand(eax, 0)); |
| 12070 | } |
| 12071 | // Check if the result handle holds 0 |
| 12072 | __ test(eax, Operand(eax)); |
| 12073 | __ j(not_zero, &get_result, taken); |
| 12074 | // It was zero; the result is undefined. |
| 12075 | __ mov(eax, Factory::undefined_value()); |
| 12076 | __ jmp(&prologue); |
| 12077 | // It was non-zero. Dereference to get the result value. |
| 12078 | __ bind(&get_result); |
| 12079 | __ mov(eax, Operand(eax, 0)); |
| 12080 | __ bind(&prologue); |
| 12081 | __ LeaveExitFrame(ExitFrame::MODE_NORMAL); |
| 12082 | __ ret(0); |
| 12083 | __ bind(&promote_scheduled_exception); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 12084 | __ TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 12085 | } |
| 12086 | |
| 12087 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12088 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 12089 | Label* throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12090 | Label* throw_termination_exception, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12091 | Label* throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12092 | bool do_gc, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12093 | bool always_allocate_scope, |
| 12094 | int /* alignment_skew */) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12095 | // eax: result parameter for PerformGC, if any |
| 12096 | // ebx: pointer to C function (C callee-saved) |
| 12097 | // ebp: frame pointer (restored after C call) |
| 12098 | // esp: stack pointer (restored after C call) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 12099 | // edi: number of arguments including receiver (C callee-saved) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12100 | // esi: pointer to the first argument (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12101 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 12102 | // Result returned in eax, or eax+edx if result_size_ is 2. |
| 12103 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12104 | // Check stack alignment. |
| 12105 | if (FLAG_debug_code) { |
| 12106 | __ CheckStackAlignment(); |
| 12107 | } |
| 12108 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12109 | if (do_gc) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12110 | // Pass failure code returned from last attempt as first argument to |
| 12111 | // PerformGC. No need to use PrepareCallCFunction/CallCFunction here as the |
| 12112 | // stack alignment is known to be correct. This function takes one argument |
| 12113 | // which is passed on the stack, and we know that the stack has been |
| 12114 | // prepared to pass at least one argument. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12115 | __ mov(Operand(esp, 0 * kPointerSize), eax); // Result. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12116 | __ call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12117 | } |
| 12118 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12119 | ExternalReference scope_depth = |
| 12120 | ExternalReference::heap_always_allocate_scope_depth(); |
| 12121 | if (always_allocate_scope) { |
| 12122 | __ inc(Operand::StaticVariable(scope_depth)); |
| 12123 | } |
| 12124 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12125 | // Call C function. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12126 | __ mov(Operand(esp, 0 * kPointerSize), edi); // argc. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12127 | __ mov(Operand(esp, 1 * kPointerSize), esi); // argv. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12128 | __ call(Operand(ebx)); |
| 12129 | // Result is in eax or edx:eax - do not destroy these registers! |
| 12130 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12131 | if (always_allocate_scope) { |
| 12132 | __ dec(Operand::StaticVariable(scope_depth)); |
| 12133 | } |
| 12134 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 12135 | // Make sure we're not trying to return 'the hole' from the runtime |
| 12136 | // call as this may lead to crashes in the IC code later. |
| 12137 | if (FLAG_debug_code) { |
| 12138 | Label okay; |
| 12139 | __ cmp(eax, Factory::the_hole_value()); |
| 12140 | __ j(not_equal, &okay); |
| 12141 | __ int3(); |
| 12142 | __ bind(&okay); |
| 12143 | } |
| 12144 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12145 | // Check for failure result. |
| 12146 | Label failure_returned; |
| 12147 | ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 12148 | __ lea(ecx, Operand(eax, 1)); |
| 12149 | // Lower 2 bits of ecx are 0 iff eax has failure tag. |
| 12150 | __ test(ecx, Immediate(kFailureTagMask)); |
| 12151 | __ j(zero, &failure_returned, not_taken); |
| 12152 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12153 | // Exit the JavaScript to C++ exit frame. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 12154 | __ LeaveExitFrame(mode_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12155 | __ ret(0); |
| 12156 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12157 | // Handling of failure. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12158 | __ bind(&failure_returned); |
| 12159 | |
| 12160 | Label retry; |
| 12161 | // If the returned exception is RETRY_AFTER_GC continue at retry label |
| 12162 | ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 12163 | __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 12164 | __ j(zero, &retry, taken); |
| 12165 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12166 | // Special handling of out of memory exceptions. |
| 12167 | __ cmp(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 12168 | __ j(equal, throw_out_of_memory_exception); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12169 | |
| 12170 | // Retrieve the pending exception and clear the variable. |
| 12171 | ExternalReference pending_exception_address(Top::k_pending_exception_address); |
| 12172 | __ mov(eax, Operand::StaticVariable(pending_exception_address)); |
| 12173 | __ mov(edx, |
| 12174 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 12175 | __ mov(Operand::StaticVariable(pending_exception_address), edx); |
| 12176 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12177 | // Special handling of termination exceptions which are uncatchable |
| 12178 | // by javascript code. |
| 12179 | __ cmp(eax, Factory::termination_exception()); |
| 12180 | __ j(equal, throw_termination_exception); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12181 | |
| 12182 | // Handle normal exception. |
| 12183 | __ jmp(throw_normal_exception); |
| 12184 | |
| 12185 | // Retry. |
| 12186 | __ bind(&retry); |
| 12187 | } |
| 12188 | |
| 12189 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12190 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 12191 | UncatchableExceptionType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12192 | // Adjust this code if not the case. |
| 12193 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 12194 | |
| 12195 | // Drop sp to the top stack handler. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12196 | ExternalReference handler_address(Top::k_handler_address); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12197 | __ mov(esp, Operand::StaticVariable(handler_address)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12198 | |
| 12199 | // Unwind the handlers until the ENTRY handler is found. |
| 12200 | Label loop, done; |
| 12201 | __ bind(&loop); |
| 12202 | // Load the type of the current stack handler. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12203 | const int kStateOffset = StackHandlerConstants::kStateOffset; |
| 12204 | __ cmp(Operand(esp, kStateOffset), Immediate(StackHandler::ENTRY)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12205 | __ j(equal, &done); |
| 12206 | // Fetch the next handler in the list. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12207 | const int kNextOffset = StackHandlerConstants::kNextOffset; |
| 12208 | __ mov(esp, Operand(esp, kNextOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12209 | __ jmp(&loop); |
| 12210 | __ bind(&done); |
| 12211 | |
| 12212 | // Set the top handler address to next handler past the current ENTRY handler. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12213 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 12214 | __ pop(Operand::StaticVariable(handler_address)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12215 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12216 | if (type == OUT_OF_MEMORY) { |
| 12217 | // Set external caught exception to false. |
| 12218 | ExternalReference external_caught(Top::k_external_caught_exception_address); |
| 12219 | __ mov(eax, false); |
| 12220 | __ mov(Operand::StaticVariable(external_caught), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12221 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12222 | // Set pending exception and eax to out of memory exception. |
| 12223 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 12224 | __ mov(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 12225 | __ mov(Operand::StaticVariable(pending_exception), eax); |
| 12226 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12227 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12228 | // Clear the context pointer. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12229 | __ xor_(esi, Operand(esi)); |
| 12230 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12231 | // Restore fp from handler and discard handler state. |
| 12232 | ASSERT(StackHandlerConstants::kFPOffset == 1 * kPointerSize); |
| 12233 | __ pop(ebp); |
| 12234 | __ pop(edx); // State. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12235 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12236 | ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12237 | __ ret(0); |
| 12238 | } |
| 12239 | |
| 12240 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 12241 | void CEntryStub::Generate(MacroAssembler* masm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 12242 | // eax: number of arguments including receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12243 | // ebx: pointer to C function (C callee-saved) |
| 12244 | // ebp: frame pointer (restored after C call) |
| 12245 | // esp: stack pointer (restored after C call) |
| 12246 | // esi: current context (C callee-saved) |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12247 | // edi: JS function of the caller (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12248 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 12249 | // NOTE: Invocations of builtins may return failure objects instead |
| 12250 | // of a proper result. The builtin entry handles this by performing |
| 12251 | // a garbage collection and retrying the builtin (twice). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12252 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12253 | // Enter the exit frame that transitions from JavaScript to C++. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 12254 | __ EnterExitFrame(mode_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12255 | |
| 12256 | // eax: result parameter for PerformGC, if any (setup below) |
| 12257 | // ebx: pointer to builtin function (C callee-saved) |
| 12258 | // ebp: frame pointer (restored after C call) |
| 12259 | // esp: stack pointer (restored after C call) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 12260 | // edi: number of arguments including receiver (C callee-saved) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12261 | // esi: argv pointer (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12262 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12263 | Label throw_normal_exception; |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12264 | Label throw_termination_exception; |
| 12265 | Label throw_out_of_memory_exception; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12266 | |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 12267 | // Call into the runtime system. |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12268 | GenerateCore(masm, |
| 12269 | &throw_normal_exception, |
| 12270 | &throw_termination_exception, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12271 | &throw_out_of_memory_exception, |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 12272 | false, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12273 | false); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12274 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12275 | // Do space-specific GC and retry runtime call. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12276 | GenerateCore(masm, |
| 12277 | &throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12278 | &throw_termination_exception, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12279 | &throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12280 | true, |
| 12281 | false); |
| 12282 | |
| 12283 | // Do full GC and retry runtime call one final time. |
| 12284 | Failure* failure = Failure::InternalError(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 12285 | __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure))); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12286 | GenerateCore(masm, |
| 12287 | &throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12288 | &throw_termination_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12289 | &throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 12290 | true, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 12291 | true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12292 | |
| 12293 | __ bind(&throw_out_of_memory_exception); |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 12294 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 12295 | |
| 12296 | __ bind(&throw_termination_exception); |
| 12297 | GenerateThrowUncatchable(masm, TERMINATION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12298 | |
| 12299 | __ bind(&throw_normal_exception); |
| 12300 | GenerateThrowTOS(masm); |
| 12301 | } |
| 12302 | |
| 12303 | |
| 12304 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 12305 | Label invoke, exit; |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 12306 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 12307 | Label not_outermost_js, not_outermost_js_2; |
| 12308 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12309 | |
| 12310 | // Setup frame. |
| 12311 | __ push(ebp); |
| 12312 | __ mov(ebp, Operand(esp)); |
| 12313 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 12314 | // Push marker in two places. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12315 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 12316 | __ push(Immediate(Smi::FromInt(marker))); // context slot |
| 12317 | __ push(Immediate(Smi::FromInt(marker))); // function slot |
| 12318 | // Save callee-saved registers (C calling conventions). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12319 | __ push(edi); |
| 12320 | __ push(esi); |
| 12321 | __ push(ebx); |
| 12322 | |
| 12323 | // Save copies of the top frame descriptor on the stack. |
| 12324 | ExternalReference c_entry_fp(Top::k_c_entry_fp_address); |
| 12325 | __ push(Operand::StaticVariable(c_entry_fp)); |
| 12326 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 12327 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 12328 | // If this is the outermost JS call, set js_entry_sp value. |
| 12329 | ExternalReference js_entry_sp(Top::k_js_entry_sp_address); |
| 12330 | __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 12331 | __ j(not_equal, ¬_outermost_js); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 12332 | __ mov(Operand::StaticVariable(js_entry_sp), ebp); |
| 12333 | __ bind(¬_outermost_js); |
| 12334 | #endif |
| 12335 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12336 | // Call a faked try-block that does the invoke. |
| 12337 | __ call(&invoke); |
| 12338 | |
| 12339 | // Caught exception: Store result (exception) in the pending |
| 12340 | // exception field in the JSEnv and return a failure sentinel. |
| 12341 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 12342 | __ mov(Operand::StaticVariable(pending_exception), eax); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 12343 | __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12344 | __ jmp(&exit); |
| 12345 | |
| 12346 | // Invoke: Link this frame into the handler chain. |
| 12347 | __ bind(&invoke); |
| 12348 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12349 | |
| 12350 | // Clear any pending exceptions. |
| 12351 | __ mov(edx, |
| 12352 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 12353 | __ mov(Operand::StaticVariable(pending_exception), edx); |
| 12354 | |
| 12355 | // Fake a receiver (NULL). |
| 12356 | __ push(Immediate(0)); // receiver |
| 12357 | |
| 12358 | // Invoke the function by calling through JS entry trampoline |
| 12359 | // builtin and pop the faked function when we return. Notice that we |
| 12360 | // cannot store a reference to the trampoline code directly in this |
| 12361 | // stub, because the builtin stubs may not have been generated yet. |
| 12362 | if (is_construct) { |
| 12363 | ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 12364 | __ mov(edx, Immediate(construct_entry)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12365 | } else { |
| 12366 | ExternalReference entry(Builtins::JSEntryTrampoline); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 12367 | __ mov(edx, Immediate(entry)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12368 | } |
| 12369 | __ mov(edx, Operand(edx, 0)); // deref address |
| 12370 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 12371 | __ call(Operand(edx)); |
| 12372 | |
| 12373 | // Unlink this frame from the handler chain. |
| 12374 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_handler_address))); |
| 12375 | // Pop next_sp. |
| 12376 | __ add(Operand(esp), Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 12377 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 12378 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 12379 | // If current EBP value is the same as js_entry_sp value, it means that |
| 12380 | // the current function is the outermost. |
| 12381 | __ cmp(ebp, Operand::StaticVariable(js_entry_sp)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 12382 | __ j(not_equal, ¬_outermost_js_2); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 12383 | __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
| 12384 | __ bind(¬_outermost_js_2); |
| 12385 | #endif |
| 12386 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12387 | // Restore the top frame descriptor from the stack. |
| 12388 | __ bind(&exit); |
| 12389 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_c_entry_fp_address))); |
| 12390 | |
| 12391 | // Restore callee-saved registers (C calling conventions). |
| 12392 | __ pop(ebx); |
| 12393 | __ pop(esi); |
| 12394 | __ pop(edi); |
| 12395 | __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers |
| 12396 | |
| 12397 | // Restore frame pointer and return. |
| 12398 | __ pop(ebp); |
| 12399 | __ ret(0); |
| 12400 | } |
| 12401 | |
| 12402 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12403 | void InstanceofStub::Generate(MacroAssembler* masm) { |
| 12404 | // Get the object - go slow case if it's a smi. |
| 12405 | Label slow; |
| 12406 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // 2 ~ return address, function |
| 12407 | __ test(eax, Immediate(kSmiTagMask)); |
| 12408 | __ j(zero, &slow, not_taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12409 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12410 | // Check that the left hand is a JS object. |
ager@chromium.org | 13441bf | 2009-05-12 13:10:27 +0000 | [diff] [blame] | 12411 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); // eax - object map |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12412 | __ movzx_b(ecx, FieldOperand(eax, Map::kInstanceTypeOffset)); // ecx - type |
| 12413 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 12414 | __ j(below, &slow, not_taken); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12415 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 12416 | __ j(above, &slow, not_taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12417 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12418 | // Get the prototype of the function. |
| 12419 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // 1 ~ return address |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 12420 | // edx is function, eax is map. |
| 12421 | |
| 12422 | // Look up the function and the map in the instanceof cache. |
| 12423 | Label miss; |
| 12424 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 12425 | __ mov(ecx, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 12426 | __ cmp(edx, Operand::StaticArray(ecx, times_pointer_size, roots_address)); |
| 12427 | __ j(not_equal, &miss); |
| 12428 | __ mov(ecx, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 12429 | __ cmp(eax, Operand::StaticArray(ecx, times_pointer_size, roots_address)); |
| 12430 | __ j(not_equal, &miss); |
| 12431 | __ mov(ecx, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 12432 | __ mov(eax, Operand::StaticArray(ecx, times_pointer_size, roots_address)); |
| 12433 | __ ret(2 * kPointerSize); |
| 12434 | |
| 12435 | __ bind(&miss); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12436 | __ TryGetFunctionPrototype(edx, ebx, ecx, &slow); |
| 12437 | |
| 12438 | // Check that the function prototype is a JS object. |
ager@chromium.org | 13441bf | 2009-05-12 13:10:27 +0000 | [diff] [blame] | 12439 | __ test(ebx, Immediate(kSmiTagMask)); |
| 12440 | __ j(zero, &slow, not_taken); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12441 | __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 12442 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 12443 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 12444 | __ j(below, &slow, not_taken); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12445 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 12446 | __ j(above, &slow, not_taken); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12447 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 12448 | // Register mapping: |
| 12449 | // eax is object map. |
| 12450 | // edx is function. |
| 12451 | // ebx is function prototype. |
| 12452 | __ mov(ecx, Immediate(Heap::kInstanceofCacheMapRootIndex)); |
| 12453 | __ mov(Operand::StaticArray(ecx, times_pointer_size, roots_address), eax); |
| 12454 | __ mov(ecx, Immediate(Heap::kInstanceofCacheFunctionRootIndex)); |
| 12455 | __ mov(Operand::StaticArray(ecx, times_pointer_size, roots_address), edx); |
| 12456 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12457 | __ mov(ecx, FieldOperand(eax, Map::kPrototypeOffset)); |
| 12458 | |
| 12459 | // Loop through the prototype chain looking for the function prototype. |
| 12460 | Label loop, is_instance, is_not_instance; |
| 12461 | __ bind(&loop); |
| 12462 | __ cmp(ecx, Operand(ebx)); |
| 12463 | __ j(equal, &is_instance); |
| 12464 | __ cmp(Operand(ecx), Immediate(Factory::null_value())); |
| 12465 | __ j(equal, &is_not_instance); |
| 12466 | __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 12467 | __ mov(ecx, FieldOperand(ecx, Map::kPrototypeOffset)); |
| 12468 | __ jmp(&loop); |
| 12469 | |
| 12470 | __ bind(&is_instance); |
| 12471 | __ Set(eax, Immediate(0)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 12472 | __ mov(ecx, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 12473 | __ mov(Operand::StaticArray(ecx, times_pointer_size, roots_address), eax); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12474 | __ ret(2 * kPointerSize); |
| 12475 | |
| 12476 | __ bind(&is_not_instance); |
| 12477 | __ Set(eax, Immediate(Smi::FromInt(1))); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 12478 | __ mov(ecx, Immediate(Heap::kInstanceofCacheAnswerRootIndex)); |
| 12479 | __ mov(Operand::StaticArray(ecx, times_pointer_size, roots_address), eax); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 12480 | __ ret(2 * kPointerSize); |
| 12481 | |
| 12482 | // Slow-case: Go through the JavaScript implementation. |
| 12483 | __ bind(&slow); |
| 12484 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 12485 | } |
| 12486 | |
| 12487 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 12488 | int CompareStub::MinorKey() { |
| 12489 | // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| 12490 | // stubs the never NaN NaN condition is only taken into account if the |
| 12491 | // condition is equals. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 12492 | ASSERT(static_cast<unsigned>(cc_) < (1 << 13)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 12493 | return ConditionField::encode(static_cast<unsigned>(cc_)) |
| 12494 | | StrictField::encode(strict_) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 12495 | | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false) |
| 12496 | | IncludeNumberCompareField::encode(include_number_compare_); |
| 12497 | } |
| 12498 | |
| 12499 | |
| 12500 | // Unfortunately you have to run without snapshots to see most of these |
| 12501 | // names in the profile since most compare stubs end up in the snapshot. |
| 12502 | const char* CompareStub::GetName() { |
| 12503 | if (name_ != NULL) return name_; |
| 12504 | const int kMaxNameLength = 100; |
| 12505 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
| 12506 | if (name_ == NULL) return "OOM"; |
| 12507 | |
| 12508 | const char* cc_name; |
| 12509 | switch (cc_) { |
| 12510 | case less: cc_name = "LT"; break; |
| 12511 | case greater: cc_name = "GT"; break; |
| 12512 | case less_equal: cc_name = "LE"; break; |
| 12513 | case greater_equal: cc_name = "GE"; break; |
| 12514 | case equal: cc_name = "EQ"; break; |
| 12515 | case not_equal: cc_name = "NE"; break; |
| 12516 | default: cc_name = "UnknownCondition"; break; |
| 12517 | } |
| 12518 | |
| 12519 | const char* strict_name = ""; |
| 12520 | if (strict_ && (cc_ == equal || cc_ == not_equal)) { |
| 12521 | strict_name = "_STRICT"; |
| 12522 | } |
| 12523 | |
| 12524 | const char* never_nan_nan_name = ""; |
| 12525 | if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) { |
| 12526 | never_nan_nan_name = "_NO_NAN"; |
| 12527 | } |
| 12528 | |
| 12529 | const char* include_number_compare_name = ""; |
| 12530 | if (!include_number_compare_) { |
| 12531 | include_number_compare_name = "_NO_NUMBER"; |
| 12532 | } |
| 12533 | |
| 12534 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 12535 | "CompareStub_%s%s%s%s", |
| 12536 | cc_name, |
| 12537 | strict_name, |
| 12538 | never_nan_nan_name, |
| 12539 | include_number_compare_name); |
| 12540 | return name_; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 12541 | } |
| 12542 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12543 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12544 | // ------------------------------------------------------------------------- |
| 12545 | // StringCharCodeAtGenerator |
| 12546 | |
| 12547 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 12548 | Label flat_string; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12549 | Label ascii_string; |
| 12550 | Label got_char_code; |
| 12551 | |
| 12552 | // If the receiver is a smi trigger the non-string case. |
| 12553 | ASSERT(kSmiTag == 0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12554 | __ test(object_, Immediate(kSmiTagMask)); |
| 12555 | __ j(zero, receiver_not_string_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12556 | |
| 12557 | // Fetch the instance type of the receiver into result register. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12558 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 12559 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12560 | // If the receiver is not a string trigger the non-string case. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12561 | __ test(result_, Immediate(kIsNotStringMask)); |
| 12562 | __ j(not_zero, receiver_not_string_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12563 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 12564 | // If the index is non-smi trigger the non-smi case. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12565 | ASSERT(kSmiTag == 0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12566 | __ test(index_, Immediate(kSmiTagMask)); |
| 12567 | __ j(not_zero, &index_not_smi_); |
| 12568 | |
| 12569 | // Put smi-tagged index into scratch register. |
| 12570 | __ mov(scratch_, index_); |
| 12571 | __ bind(&got_smi_index_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12572 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12573 | // Check for index out of range. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12574 | __ cmp(scratch_, FieldOperand(object_, String::kLengthOffset)); |
| 12575 | __ j(above_equal, index_out_of_range_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12576 | |
| 12577 | // We need special handling for non-flat strings. |
| 12578 | ASSERT(kSeqStringTag == 0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12579 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 12580 | __ j(zero, &flat_string); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12581 | |
| 12582 | // Handle non-flat strings. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12583 | __ test(result_, Immediate(kIsConsStringMask)); |
| 12584 | __ j(zero, &call_runtime_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12585 | |
| 12586 | // ConsString. |
| 12587 | // Check whether the right hand side is the empty string (i.e. if |
| 12588 | // this is really a flat string in a cons string). If that is not |
| 12589 | // the case we would rather go to the runtime system now to flatten |
| 12590 | // the string. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12591 | __ cmp(FieldOperand(object_, ConsString::kSecondOffset), |
| 12592 | Immediate(Factory::empty_string())); |
| 12593 | __ j(not_equal, &call_runtime_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12594 | // Get the first of the two strings and load its instance type. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12595 | __ mov(object_, FieldOperand(object_, ConsString::kFirstOffset)); |
| 12596 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 12597 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
| 12598 | // If the first cons component is also non-flat, then go to runtime. |
| 12599 | ASSERT(kSeqStringTag == 0); |
| 12600 | __ test(result_, Immediate(kStringRepresentationMask)); |
| 12601 | __ j(not_zero, &call_runtime_); |
| 12602 | |
| 12603 | // Check for 1-byte or 2-byte string. |
| 12604 | __ bind(&flat_string); |
| 12605 | ASSERT(kAsciiStringTag != 0); |
| 12606 | __ test(result_, Immediate(kStringEncodingMask)); |
| 12607 | __ j(not_zero, &ascii_string); |
| 12608 | |
| 12609 | // 2-byte string. |
| 12610 | // Load the 2-byte character code into the result register. |
| 12611 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 12612 | __ movzx_w(result_, FieldOperand(object_, |
| 12613 | scratch_, times_1, // Scratch is smi-tagged. |
| 12614 | SeqTwoByteString::kHeaderSize)); |
| 12615 | __ jmp(&got_char_code); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12616 | |
| 12617 | // ASCII string. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 12618 | // Load the byte into the result register. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12619 | __ bind(&ascii_string); |
| 12620 | __ SmiUntag(scratch_); |
| 12621 | __ movzx_b(result_, FieldOperand(object_, |
| 12622 | scratch_, times_1, |
| 12623 | SeqAsciiString::kHeaderSize)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12624 | __ bind(&got_char_code); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12625 | __ SmiTag(result_); |
| 12626 | __ bind(&exit_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12627 | } |
| 12628 | |
| 12629 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12630 | void StringCharCodeAtGenerator::GenerateSlow( |
| 12631 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 12632 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12633 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12634 | // Index is not a smi. |
| 12635 | __ bind(&index_not_smi_); |
| 12636 | // If index is a heap number, try converting it to an integer. |
| 12637 | __ CheckMap(index_, Factory::heap_number_map(), index_not_number_, true); |
| 12638 | call_helper.BeforeCall(masm); |
| 12639 | __ push(object_); |
| 12640 | __ push(index_); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12641 | __ push(index_); // Consumed by runtime conversion function. |
| 12642 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 12643 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 12644 | } else { |
| 12645 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 12646 | // NumberToSmi discards numbers that are not exact integers. |
| 12647 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 12648 | } |
| 12649 | if (!scratch_.is(eax)) { |
| 12650 | // Save the conversion result before the pop instructions below |
| 12651 | // have a chance to overwrite it. |
| 12652 | __ mov(scratch_, eax); |
| 12653 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12654 | __ pop(index_); |
| 12655 | __ pop(object_); |
sgjesse@chromium.org | 82dbbab | 2010-06-02 08:57:44 +0000 | [diff] [blame^] | 12656 | // Reload the instance type. |
| 12657 | __ mov(result_, FieldOperand(object_, HeapObject::kMapOffset)); |
| 12658 | __ movzx_b(result_, FieldOperand(result_, Map::kInstanceTypeOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12659 | call_helper.AfterCall(masm); |
| 12660 | // If index is still not a smi, it must be out of range. |
| 12661 | ASSERT(kSmiTag == 0); |
| 12662 | __ test(scratch_, Immediate(kSmiTagMask)); |
| 12663 | __ j(not_zero, index_out_of_range_); |
| 12664 | // Otherwise, return to the fast path. |
| 12665 | __ jmp(&got_smi_index_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12666 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12667 | // Call runtime. We get here when the receiver is a string and the |
| 12668 | // index is a number, but the code of getting the actual character |
| 12669 | // is too complex (e.g., when the string needs to be flattened). |
| 12670 | __ bind(&call_runtime_); |
| 12671 | call_helper.BeforeCall(masm); |
| 12672 | __ push(object_); |
| 12673 | __ push(index_); |
| 12674 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 12675 | if (!result_.is(eax)) { |
| 12676 | __ mov(result_, eax); |
| 12677 | } |
| 12678 | call_helper.AfterCall(masm); |
| 12679 | __ jmp(&exit_); |
| 12680 | |
| 12681 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| 12682 | } |
| 12683 | |
| 12684 | |
| 12685 | // ------------------------------------------------------------------------- |
| 12686 | // StringCharFromCodeGenerator |
| 12687 | |
| 12688 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12689 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 12690 | ASSERT(kSmiTag == 0); |
| 12691 | ASSERT(kSmiShiftSize == 0); |
| 12692 | ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12693 | __ test(code_, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12694 | Immediate(kSmiTagMask | |
| 12695 | ((~String::kMaxAsciiCharCode) << kSmiTagSize))); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12696 | __ j(not_zero, &slow_case_, not_taken); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12697 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12698 | __ Set(result_, Immediate(Factory::single_character_string_cache())); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12699 | ASSERT(kSmiTag == 0); |
| 12700 | ASSERT(kSmiTagSize == 1); |
| 12701 | ASSERT(kSmiShiftSize == 0); |
| 12702 | // At this point code register contains smi tagged ascii char code. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12703 | __ mov(result_, FieldOperand(result_, |
| 12704 | code_, times_half_pointer_size, |
| 12705 | FixedArray::kHeaderSize)); |
| 12706 | __ cmp(result_, Factory::undefined_value()); |
| 12707 | __ j(equal, &slow_case_, not_taken); |
| 12708 | __ bind(&exit_); |
| 12709 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12710 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12711 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12712 | void StringCharFromCodeGenerator::GenerateSlow( |
| 12713 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 12714 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 12715 | |
| 12716 | __ bind(&slow_case_); |
| 12717 | call_helper.BeforeCall(masm); |
| 12718 | __ push(code_); |
| 12719 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 12720 | if (!result_.is(eax)) { |
| 12721 | __ mov(result_, eax); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12722 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 12723 | call_helper.AfterCall(masm); |
| 12724 | __ jmp(&exit_); |
| 12725 | |
| 12726 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| 12727 | } |
| 12728 | |
| 12729 | |
| 12730 | // ------------------------------------------------------------------------- |
| 12731 | // StringCharAtGenerator |
| 12732 | |
| 12733 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 12734 | char_code_at_generator_.GenerateFast(masm); |
| 12735 | char_from_code_generator_.GenerateFast(masm); |
| 12736 | } |
| 12737 | |
| 12738 | |
| 12739 | void StringCharAtGenerator::GenerateSlow( |
| 12740 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 12741 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 12742 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12743 | } |
| 12744 | |
| 12745 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12746 | void StringAddStub::Generate(MacroAssembler* masm) { |
| 12747 | Label string_add_runtime; |
| 12748 | |
| 12749 | // Load the two arguments. |
| 12750 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // First argument. |
| 12751 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // Second argument. |
| 12752 | |
| 12753 | // Make sure that both arguments are strings if not known in advance. |
| 12754 | if (string_check_) { |
| 12755 | __ test(eax, Immediate(kSmiTagMask)); |
| 12756 | __ j(zero, &string_add_runtime); |
| 12757 | __ CmpObjectType(eax, FIRST_NONSTRING_TYPE, ebx); |
| 12758 | __ j(above_equal, &string_add_runtime); |
| 12759 | |
| 12760 | // First argument is a a string, test second. |
| 12761 | __ test(edx, Immediate(kSmiTagMask)); |
| 12762 | __ j(zero, &string_add_runtime); |
| 12763 | __ CmpObjectType(edx, FIRST_NONSTRING_TYPE, ebx); |
| 12764 | __ j(above_equal, &string_add_runtime); |
| 12765 | } |
| 12766 | |
| 12767 | // Both arguments are strings. |
| 12768 | // eax: first string |
| 12769 | // edx: second string |
| 12770 | // Check if either of the strings are empty. In that case return the other. |
| 12771 | Label second_not_zero_length, both_not_zero_length; |
| 12772 | __ mov(ecx, FieldOperand(edx, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12773 | ASSERT(kSmiTag == 0); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12774 | __ test(ecx, Operand(ecx)); |
| 12775 | __ j(not_zero, &second_not_zero_length); |
| 12776 | // Second string is empty, result is first string which is already in eax. |
| 12777 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 12778 | __ ret(2 * kPointerSize); |
| 12779 | __ bind(&second_not_zero_length); |
| 12780 | __ mov(ebx, FieldOperand(eax, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12781 | ASSERT(kSmiTag == 0); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12782 | __ test(ebx, Operand(ebx)); |
| 12783 | __ j(not_zero, &both_not_zero_length); |
| 12784 | // First string is empty, result is second string which is in edx. |
| 12785 | __ mov(eax, edx); |
| 12786 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 12787 | __ ret(2 * kPointerSize); |
| 12788 | |
| 12789 | // Both strings are non-empty. |
| 12790 | // eax: first string |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12791 | // ebx: length of first string as a smi |
| 12792 | // ecx: length of second string as a smi |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12793 | // edx: second string |
| 12794 | // Look at the length of the result of adding the two strings. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 12795 | Label string_add_flat_result, longer_than_two; |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12796 | __ bind(&both_not_zero_length); |
| 12797 | __ add(ebx, Operand(ecx)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12798 | ASSERT(Smi::kMaxValue == String::kMaxLength); |
| 12799 | // Handle exceptionally long strings in the runtime system. |
| 12800 | __ j(overflow, &string_add_runtime); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12801 | // Use the runtime system when adding two one character strings, as it |
| 12802 | // contains optimizations for this specific case using the symbol table. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12803 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(2))); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 12804 | __ j(not_equal, &longer_than_two); |
| 12805 | |
| 12806 | // Check that both strings are non-external ascii strings. |
| 12807 | __ JumpIfNotBothSequentialAsciiStrings(eax, edx, ebx, ecx, |
| 12808 | &string_add_runtime); |
| 12809 | |
| 12810 | // Get the two characters forming the sub string. |
| 12811 | __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize)); |
| 12812 | __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize)); |
| 12813 | |
| 12814 | // Try to lookup two character string in symbol table. If it is not found |
| 12815 | // just allocate a new one. |
| 12816 | Label make_two_character_string, make_flat_ascii_string; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12817 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 12818 | masm, ebx, ecx, eax, edx, edi, &make_two_character_string); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 12819 | __ IncrementCounter(&Counters::string_add_native, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 12820 | __ ret(2 * kPointerSize); |
| 12821 | |
| 12822 | __ bind(&make_two_character_string); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12823 | __ Set(ebx, Immediate(Smi::FromInt(2))); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 12824 | __ jmp(&make_flat_ascii_string); |
| 12825 | |
| 12826 | __ bind(&longer_than_two); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12827 | // Check if resulting string will be flat. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12828 | __ cmp(Operand(ebx), Immediate(Smi::FromInt(String::kMinNonFlatLength))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12829 | __ j(below, &string_add_flat_result); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12830 | |
| 12831 | // If result is not supposed to be flat allocate a cons string object. If both |
| 12832 | // strings are ascii the result is an ascii cons string. |
| 12833 | Label non_ascii, allocated; |
| 12834 | __ mov(edi, FieldOperand(eax, HeapObject::kMapOffset)); |
| 12835 | __ movzx_b(ecx, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 12836 | __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset)); |
| 12837 | __ movzx_b(edi, FieldOperand(edi, Map::kInstanceTypeOffset)); |
| 12838 | __ and_(ecx, Operand(edi)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 12839 | ASSERT(kStringEncodingMask == kAsciiStringTag); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12840 | __ test(ecx, Immediate(kAsciiStringTag)); |
| 12841 | __ j(zero, &non_ascii); |
| 12842 | // Allocate an acsii cons string. |
| 12843 | __ AllocateAsciiConsString(ecx, edi, no_reg, &string_add_runtime); |
| 12844 | __ bind(&allocated); |
| 12845 | // Fill the fields of the cons string. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12846 | if (FLAG_debug_code) __ AbortIfNotSmi(ebx); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12847 | __ mov(FieldOperand(ecx, ConsString::kLengthOffset), ebx); |
| 12848 | __ mov(FieldOperand(ecx, ConsString::kHashFieldOffset), |
| 12849 | Immediate(String::kEmptyHashField)); |
| 12850 | __ mov(FieldOperand(ecx, ConsString::kFirstOffset), eax); |
| 12851 | __ mov(FieldOperand(ecx, ConsString::kSecondOffset), edx); |
| 12852 | __ mov(eax, ecx); |
| 12853 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 12854 | __ ret(2 * kPointerSize); |
| 12855 | __ bind(&non_ascii); |
| 12856 | // Allocate a two byte cons string. |
| 12857 | __ AllocateConsString(ecx, edi, no_reg, &string_add_runtime); |
| 12858 | __ jmp(&allocated); |
| 12859 | |
| 12860 | // Handle creating a flat result. First check that both strings are not |
| 12861 | // external strings. |
| 12862 | // eax: first string |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12863 | // ebx: length of resulting flat string as a smi |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12864 | // edx: second string |
| 12865 | __ bind(&string_add_flat_result); |
| 12866 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 12867 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 12868 | __ and_(ecx, kStringRepresentationMask); |
| 12869 | __ cmp(ecx, kExternalStringTag); |
| 12870 | __ j(equal, &string_add_runtime); |
| 12871 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 12872 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 12873 | __ and_(ecx, kStringRepresentationMask); |
| 12874 | __ cmp(ecx, kExternalStringTag); |
| 12875 | __ j(equal, &string_add_runtime); |
| 12876 | // Now check if both strings are ascii strings. |
| 12877 | // eax: first string |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12878 | // ebx: length of resulting flat string as a smi |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12879 | // edx: second string |
| 12880 | Label non_ascii_string_add_flat_result; |
| 12881 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 12882 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 12883 | ASSERT(kStringEncodingMask == kAsciiStringTag); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12884 | __ test(ecx, Immediate(kAsciiStringTag)); |
| 12885 | __ j(zero, &non_ascii_string_add_flat_result); |
| 12886 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 12887 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 12888 | __ test(ecx, Immediate(kAsciiStringTag)); |
| 12889 | __ j(zero, &string_add_runtime); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 12890 | |
| 12891 | __ bind(&make_flat_ascii_string); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12892 | // Both strings are ascii strings. As they are short they are both flat. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12893 | // ebx: length of resulting flat string as a smi |
| 12894 | __ SmiUntag(ebx); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12895 | __ AllocateAsciiString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 12896 | // eax: result string |
| 12897 | __ mov(ecx, eax); |
| 12898 | // Locate first character of result. |
| 12899 | __ add(Operand(ecx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 12900 | // Load first argument and locate first character. |
| 12901 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 12902 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12903 | __ SmiUntag(edi); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12904 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 12905 | // eax: result string |
| 12906 | // ecx: first character of result |
| 12907 | // edx: first char of first argument |
| 12908 | // edi: length of first argument |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12909 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12910 | // Load second argument and locate first character. |
| 12911 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 12912 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12913 | __ SmiUntag(edi); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12914 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 12915 | // eax: result string |
| 12916 | // ecx: next character of result |
| 12917 | // edx: first char of second argument |
| 12918 | // edi: length of second argument |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12919 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, true); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12920 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 12921 | __ ret(2 * kPointerSize); |
| 12922 | |
| 12923 | // Handle creating a flat two byte result. |
| 12924 | // eax: first string - known to be two byte |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12925 | // ebx: length of resulting flat string as a smi |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12926 | // edx: second string |
| 12927 | __ bind(&non_ascii_string_add_flat_result); |
| 12928 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 12929 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 12930 | __ and_(ecx, kAsciiStringTag); |
| 12931 | __ j(not_zero, &string_add_runtime); |
| 12932 | // Both strings are two byte strings. As they are short they are both |
| 12933 | // flat. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12934 | __ SmiUntag(ebx); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12935 | __ AllocateTwoByteString(eax, ebx, ecx, edx, edi, &string_add_runtime); |
| 12936 | // eax: result string |
| 12937 | __ mov(ecx, eax); |
| 12938 | // Locate first character of result. |
| 12939 | __ add(Operand(ecx), |
| 12940 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 12941 | // Load first argument and locate first character. |
| 12942 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 12943 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12944 | __ SmiUntag(edi); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12945 | __ add(Operand(edx), |
| 12946 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 12947 | // eax: result string |
| 12948 | // ecx: first character of result |
| 12949 | // edx: first char of first argument |
| 12950 | // edi: length of first argument |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12951 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12952 | // Load second argument and locate first character. |
| 12953 | __ mov(edx, Operand(esp, 1 * kPointerSize)); |
| 12954 | __ mov(edi, FieldOperand(edx, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 12955 | __ SmiUntag(edi); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12956 | __ add(Operand(edx), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 12957 | // eax: result string |
| 12958 | // ecx: next character of result |
| 12959 | // edx: first char of second argument |
| 12960 | // edi: length of second argument |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12961 | StringHelper::GenerateCopyCharacters(masm, ecx, edx, edi, ebx, false); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12962 | __ IncrementCounter(&Counters::string_add_native, 1); |
| 12963 | __ ret(2 * kPointerSize); |
| 12964 | |
| 12965 | // Just jump to runtime to add the two strings. |
| 12966 | __ bind(&string_add_runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 12967 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12968 | } |
| 12969 | |
| 12970 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12971 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 12972 | Register dest, |
| 12973 | Register src, |
| 12974 | Register count, |
| 12975 | Register scratch, |
| 12976 | bool ascii) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 12977 | Label loop; |
| 12978 | __ bind(&loop); |
| 12979 | // This loop just copies one character at a time, as it is only used for very |
| 12980 | // short strings. |
| 12981 | if (ascii) { |
| 12982 | __ mov_b(scratch, Operand(src, 0)); |
| 12983 | __ mov_b(Operand(dest, 0), scratch); |
| 12984 | __ add(Operand(src), Immediate(1)); |
| 12985 | __ add(Operand(dest), Immediate(1)); |
| 12986 | } else { |
| 12987 | __ mov_w(scratch, Operand(src, 0)); |
| 12988 | __ mov_w(Operand(dest, 0), scratch); |
| 12989 | __ add(Operand(src), Immediate(2)); |
| 12990 | __ add(Operand(dest), Immediate(2)); |
| 12991 | } |
| 12992 | __ sub(Operand(count), Immediate(1)); |
| 12993 | __ j(not_zero, &loop); |
| 12994 | } |
| 12995 | |
| 12996 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 12997 | void StringHelper::GenerateCopyCharactersREP(MacroAssembler* masm, |
| 12998 | Register dest, |
| 12999 | Register src, |
| 13000 | Register count, |
| 13001 | Register scratch, |
| 13002 | bool ascii) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13003 | // Copy characters using rep movs of doublewords. Align destination on 4 byte |
| 13004 | // boundary before starting rep movs. Copy remaining characters after running |
| 13005 | // rep movs. |
| 13006 | ASSERT(dest.is(edi)); // rep movs destination |
| 13007 | ASSERT(src.is(esi)); // rep movs source |
| 13008 | ASSERT(count.is(ecx)); // rep movs count |
| 13009 | ASSERT(!scratch.is(dest)); |
| 13010 | ASSERT(!scratch.is(src)); |
| 13011 | ASSERT(!scratch.is(count)); |
| 13012 | |
| 13013 | // Nothing to do for zero characters. |
| 13014 | Label done; |
| 13015 | __ test(count, Operand(count)); |
| 13016 | __ j(zero, &done); |
| 13017 | |
| 13018 | // Make count the number of bytes to copy. |
| 13019 | if (!ascii) { |
| 13020 | __ shl(count, 1); |
| 13021 | } |
| 13022 | |
| 13023 | // Don't enter the rep movs if there are less than 4 bytes to copy. |
| 13024 | Label last_bytes; |
| 13025 | __ test(count, Immediate(~3)); |
| 13026 | __ j(zero, &last_bytes); |
| 13027 | |
| 13028 | // Copy from edi to esi using rep movs instruction. |
| 13029 | __ mov(scratch, count); |
| 13030 | __ sar(count, 2); // Number of doublewords to copy. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13031 | __ cld(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13032 | __ rep_movs(); |
| 13033 | |
| 13034 | // Find number of bytes left. |
| 13035 | __ mov(count, scratch); |
| 13036 | __ and_(count, 3); |
| 13037 | |
| 13038 | // Check if there are more bytes to copy. |
| 13039 | __ bind(&last_bytes); |
| 13040 | __ test(count, Operand(count)); |
| 13041 | __ j(zero, &done); |
| 13042 | |
| 13043 | // Copy remaining characters. |
| 13044 | Label loop; |
| 13045 | __ bind(&loop); |
| 13046 | __ mov_b(scratch, Operand(src, 0)); |
| 13047 | __ mov_b(Operand(dest, 0), scratch); |
| 13048 | __ add(Operand(src), Immediate(1)); |
| 13049 | __ add(Operand(dest), Immediate(1)); |
| 13050 | __ sub(Operand(count), Immediate(1)); |
| 13051 | __ j(not_zero, &loop); |
| 13052 | |
| 13053 | __ bind(&done); |
| 13054 | } |
| 13055 | |
| 13056 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13057 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 13058 | Register c1, |
| 13059 | Register c2, |
| 13060 | Register scratch1, |
| 13061 | Register scratch2, |
| 13062 | Register scratch3, |
| 13063 | Label* not_found) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13064 | // Register scratch3 is the general scratch register in this function. |
| 13065 | Register scratch = scratch3; |
| 13066 | |
| 13067 | // Make sure that both characters are not digits as such strings has a |
| 13068 | // different hash algorithm. Don't try to look for these in the symbol table. |
| 13069 | Label not_array_index; |
| 13070 | __ mov(scratch, c1); |
| 13071 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 13072 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
| 13073 | __ j(above, ¬_array_index); |
| 13074 | __ mov(scratch, c2); |
| 13075 | __ sub(Operand(scratch), Immediate(static_cast<int>('0'))); |
| 13076 | __ cmp(Operand(scratch), Immediate(static_cast<int>('9' - '0'))); |
| 13077 | __ j(below_equal, not_found); |
| 13078 | |
| 13079 | __ bind(¬_array_index); |
| 13080 | // Calculate the two character string hash. |
| 13081 | Register hash = scratch1; |
| 13082 | GenerateHashInit(masm, hash, c1, scratch); |
| 13083 | GenerateHashAddCharacter(masm, hash, c2, scratch); |
| 13084 | GenerateHashGetHash(masm, hash, scratch); |
| 13085 | |
| 13086 | // Collect the two characters in a register. |
| 13087 | Register chars = c1; |
| 13088 | __ shl(c2, kBitsPerByte); |
| 13089 | __ or_(chars, Operand(c2)); |
| 13090 | |
| 13091 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 13092 | // hash: hash of two character string. |
| 13093 | |
| 13094 | // Load the symbol table. |
| 13095 | Register symbol_table = c2; |
| 13096 | ExternalReference roots_address = ExternalReference::roots_address(); |
| 13097 | __ mov(scratch, Immediate(Heap::kSymbolTableRootIndex)); |
| 13098 | __ mov(symbol_table, |
| 13099 | Operand::StaticArray(scratch, times_pointer_size, roots_address)); |
| 13100 | |
| 13101 | // Calculate capacity mask from the symbol table capacity. |
| 13102 | Register mask = scratch2; |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13103 | __ mov(mask, FieldOperand(symbol_table, SymbolTable::kCapacityOffset)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13104 | __ SmiUntag(mask); |
| 13105 | __ sub(Operand(mask), Immediate(1)); |
| 13106 | |
| 13107 | // Registers |
| 13108 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 13109 | // hash: hash of two character string |
| 13110 | // symbol_table: symbol table |
| 13111 | // mask: capacity mask |
| 13112 | // scratch: - |
| 13113 | |
| 13114 | // Perform a number of probes in the symbol table. |
| 13115 | static const int kProbes = 4; |
| 13116 | Label found_in_symbol_table; |
| 13117 | Label next_probe[kProbes], next_probe_pop_mask[kProbes]; |
| 13118 | for (int i = 0; i < kProbes; i++) { |
| 13119 | // Calculate entry in symbol table. |
| 13120 | __ mov(scratch, hash); |
| 13121 | if (i > 0) { |
| 13122 | __ add(Operand(scratch), Immediate(SymbolTable::GetProbeOffset(i))); |
| 13123 | } |
| 13124 | __ and_(scratch, Operand(mask)); |
| 13125 | |
| 13126 | // Load the entry from the symble table. |
| 13127 | Register candidate = scratch; // Scratch register contains candidate. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13128 | ASSERT_EQ(1, SymbolTable::kEntrySize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13129 | __ mov(candidate, |
| 13130 | FieldOperand(symbol_table, |
| 13131 | scratch, |
| 13132 | times_pointer_size, |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13133 | SymbolTable::kElementsStartOffset)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13134 | |
| 13135 | // If entry is undefined no string with this hash can be found. |
| 13136 | __ cmp(candidate, Factory::undefined_value()); |
| 13137 | __ j(equal, not_found); |
| 13138 | |
| 13139 | // If length is not 2 the string is not a candidate. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 13140 | __ cmp(FieldOperand(candidate, String::kLengthOffset), |
| 13141 | Immediate(Smi::FromInt(2))); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13142 | __ j(not_equal, &next_probe[i]); |
| 13143 | |
| 13144 | // As we are out of registers save the mask on the stack and use that |
| 13145 | // register as a temporary. |
| 13146 | __ push(mask); |
| 13147 | Register temp = mask; |
| 13148 | |
| 13149 | // Check that the candidate is a non-external ascii string. |
| 13150 | __ mov(temp, FieldOperand(candidate, HeapObject::kMapOffset)); |
| 13151 | __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| 13152 | __ JumpIfInstanceTypeIsNotSequentialAscii( |
| 13153 | temp, temp, &next_probe_pop_mask[i]); |
| 13154 | |
| 13155 | // Check if the two characters match. |
| 13156 | __ mov(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 13157 | __ and_(temp, 0x0000ffff); |
| 13158 | __ cmp(chars, Operand(temp)); |
| 13159 | __ j(equal, &found_in_symbol_table); |
| 13160 | __ bind(&next_probe_pop_mask[i]); |
| 13161 | __ pop(mask); |
| 13162 | __ bind(&next_probe[i]); |
| 13163 | } |
| 13164 | |
| 13165 | // No matching 2 character string found by probing. |
| 13166 | __ jmp(not_found); |
| 13167 | |
| 13168 | // Scratch register contains result when we fall through to here. |
| 13169 | Register result = scratch; |
| 13170 | __ bind(&found_in_symbol_table); |
| 13171 | __ pop(mask); // Pop temporally saved mask from the stack. |
| 13172 | if (!result.is(eax)) { |
| 13173 | __ mov(eax, result); |
| 13174 | } |
| 13175 | } |
| 13176 | |
| 13177 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13178 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 13179 | Register hash, |
| 13180 | Register character, |
| 13181 | Register scratch) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13182 | // hash = character + (character << 10); |
| 13183 | __ mov(hash, character); |
| 13184 | __ shl(hash, 10); |
| 13185 | __ add(hash, Operand(character)); |
| 13186 | // hash ^= hash >> 6; |
| 13187 | __ mov(scratch, hash); |
| 13188 | __ sar(scratch, 6); |
| 13189 | __ xor_(hash, Operand(scratch)); |
| 13190 | } |
| 13191 | |
| 13192 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13193 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 13194 | Register hash, |
| 13195 | Register character, |
| 13196 | Register scratch) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13197 | // hash += character; |
| 13198 | __ add(hash, Operand(character)); |
| 13199 | // hash += hash << 10; |
| 13200 | __ mov(scratch, hash); |
| 13201 | __ shl(scratch, 10); |
| 13202 | __ add(hash, Operand(scratch)); |
| 13203 | // hash ^= hash >> 6; |
| 13204 | __ mov(scratch, hash); |
| 13205 | __ sar(scratch, 6); |
| 13206 | __ xor_(hash, Operand(scratch)); |
| 13207 | } |
| 13208 | |
| 13209 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13210 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 13211 | Register hash, |
| 13212 | Register scratch) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13213 | // hash += hash << 3; |
| 13214 | __ mov(scratch, hash); |
| 13215 | __ shl(scratch, 3); |
| 13216 | __ add(hash, Operand(scratch)); |
| 13217 | // hash ^= hash >> 11; |
| 13218 | __ mov(scratch, hash); |
| 13219 | __ sar(scratch, 11); |
| 13220 | __ xor_(hash, Operand(scratch)); |
| 13221 | // hash += hash << 15; |
| 13222 | __ mov(scratch, hash); |
| 13223 | __ shl(scratch, 15); |
| 13224 | __ add(hash, Operand(scratch)); |
| 13225 | |
| 13226 | // if (hash == 0) hash = 27; |
| 13227 | Label hash_not_zero; |
| 13228 | __ test(hash, Operand(hash)); |
| 13229 | __ j(not_zero, &hash_not_zero); |
| 13230 | __ mov(hash, Immediate(27)); |
| 13231 | __ bind(&hash_not_zero); |
| 13232 | } |
| 13233 | |
| 13234 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13235 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 13236 | Label runtime; |
| 13237 | |
| 13238 | // Stack frame on entry. |
| 13239 | // esp[0]: return address |
| 13240 | // esp[4]: to |
| 13241 | // esp[8]: from |
| 13242 | // esp[12]: string |
| 13243 | |
| 13244 | // Make sure first argument is a string. |
| 13245 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 13246 | ASSERT_EQ(0, kSmiTag); |
| 13247 | __ test(eax, Immediate(kSmiTagMask)); |
| 13248 | __ j(zero, &runtime); |
| 13249 | Condition is_string = masm->IsObjectStringType(eax, ebx, ebx); |
| 13250 | __ j(NegateCondition(is_string), &runtime); |
| 13251 | |
| 13252 | // eax: string |
| 13253 | // ebx: instance type |
| 13254 | // Calculate length of sub string using the smi values. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13255 | Label result_longer_than_two; |
| 13256 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); // To index. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13257 | __ test(ecx, Immediate(kSmiTagMask)); |
| 13258 | __ j(not_zero, &runtime); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13259 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // From index. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13260 | __ test(edx, Immediate(kSmiTagMask)); |
| 13261 | __ j(not_zero, &runtime); |
| 13262 | __ sub(ecx, Operand(edx)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13263 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 13264 | // are handled in the runtime system (looked up in the single character |
| 13265 | // cache). Two character strings are looked for in the symbol cache. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13266 | __ SmiUntag(ecx); // Result length is no longer smi. |
| 13267 | __ cmp(ecx, 2); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13268 | __ j(greater, &result_longer_than_two); |
| 13269 | __ j(less, &runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13270 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13271 | // Sub string of length 2 requested. |
| 13272 | // eax: string |
| 13273 | // ebx: instance type |
| 13274 | // ecx: sub string length (value is 2) |
| 13275 | // edx: from index (smi) |
| 13276 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &runtime); |
| 13277 | |
| 13278 | // Get the two characters forming the sub string. |
| 13279 | __ SmiUntag(edx); // From index is no longer smi. |
| 13280 | __ movzx_b(ebx, FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize)); |
| 13281 | __ movzx_b(ecx, |
| 13282 | FieldOperand(eax, edx, times_1, SeqAsciiString::kHeaderSize + 1)); |
| 13283 | |
| 13284 | // Try to lookup two character string in symbol table. |
| 13285 | Label make_two_character_string; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13286 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 13287 | masm, ebx, ecx, eax, edx, edi, &make_two_character_string); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13288 | __ ret(3 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13289 | |
| 13290 | __ bind(&make_two_character_string); |
| 13291 | // Setup registers for allocating the two character string. |
| 13292 | __ mov(eax, Operand(esp, 3 * kPointerSize)); |
| 13293 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 13294 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 13295 | __ Set(ecx, Immediate(2)); |
| 13296 | |
| 13297 | __ bind(&result_longer_than_two); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13298 | // eax: string |
| 13299 | // ebx: instance type |
| 13300 | // ecx: result string length |
| 13301 | // Check for flat ascii string |
| 13302 | Label non_ascii_flat; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13303 | __ JumpIfInstanceTypeIsNotSequentialAscii(ebx, ebx, &non_ascii_flat); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13304 | |
| 13305 | // Allocate the result. |
| 13306 | __ AllocateAsciiString(eax, ecx, ebx, edx, edi, &runtime); |
| 13307 | |
| 13308 | // eax: result string |
| 13309 | // ecx: result string length |
| 13310 | __ mov(edx, esi); // esi used by following code. |
| 13311 | // Locate first character of result. |
| 13312 | __ mov(edi, eax); |
| 13313 | __ add(Operand(edi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 13314 | // Load string argument and locate character of sub string start. |
| 13315 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
| 13316 | __ add(Operand(esi), Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 13317 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 13318 | __ SmiUntag(ebx); |
| 13319 | __ add(esi, Operand(ebx)); |
| 13320 | |
| 13321 | // eax: result string |
| 13322 | // ecx: result length |
| 13323 | // edx: original value of esi |
| 13324 | // edi: first character of result |
| 13325 | // esi: character of sub string start |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13326 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, true); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13327 | __ mov(esi, edx); // Restore esi. |
| 13328 | __ IncrementCounter(&Counters::sub_string_native, 1); |
| 13329 | __ ret(3 * kPointerSize); |
| 13330 | |
| 13331 | __ bind(&non_ascii_flat); |
| 13332 | // eax: string |
| 13333 | // ebx: instance type & kStringRepresentationMask | kStringEncodingMask |
| 13334 | // ecx: result string length |
| 13335 | // Check for flat two byte string |
| 13336 | __ cmp(ebx, kSeqStringTag | kTwoByteStringTag); |
| 13337 | __ j(not_equal, &runtime); |
| 13338 | |
| 13339 | // Allocate the result. |
| 13340 | __ AllocateTwoByteString(eax, ecx, ebx, edx, edi, &runtime); |
| 13341 | |
| 13342 | // eax: result string |
| 13343 | // ecx: result string length |
| 13344 | __ mov(edx, esi); // esi used by following code. |
| 13345 | // Locate first character of result. |
| 13346 | __ mov(edi, eax); |
| 13347 | __ add(Operand(edi), |
| 13348 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 13349 | // Load string argument and locate character of sub string start. |
| 13350 | __ mov(esi, Operand(esp, 3 * kPointerSize)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 13351 | __ add(Operand(esi), |
| 13352 | Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13353 | __ mov(ebx, Operand(esp, 2 * kPointerSize)); // from |
| 13354 | // As from is a smi it is 2 times the value which matches the size of a two |
| 13355 | // byte character. |
| 13356 | ASSERT_EQ(0, kSmiTag); |
| 13357 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| 13358 | __ add(esi, Operand(ebx)); |
| 13359 | |
| 13360 | // eax: result string |
| 13361 | // ecx: result length |
| 13362 | // edx: original value of esi |
| 13363 | // edi: first character of result |
| 13364 | // esi: character of sub string start |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 13365 | StringHelper::GenerateCopyCharactersREP(masm, edi, esi, ecx, ebx, false); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13366 | __ mov(esi, edx); // Restore esi. |
| 13367 | __ IncrementCounter(&Counters::sub_string_native, 1); |
| 13368 | __ ret(3 * kPointerSize); |
| 13369 | |
| 13370 | // Just jump to runtime to create the sub string. |
| 13371 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13372 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13373 | } |
| 13374 | |
| 13375 | |
| 13376 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 13377 | Register left, |
| 13378 | Register right, |
| 13379 | Register scratch1, |
| 13380 | Register scratch2, |
| 13381 | Register scratch3) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13382 | Label result_not_equal; |
| 13383 | Label result_greater; |
| 13384 | Label compare_lengths; |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 13385 | |
| 13386 | __ IncrementCounter(&Counters::string_compare_native, 1); |
| 13387 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13388 | // Find minimum length. |
| 13389 | Label left_shorter; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13390 | __ mov(scratch1, FieldOperand(left, String::kLengthOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13391 | __ mov(scratch3, scratch1); |
| 13392 | __ sub(scratch3, FieldOperand(right, String::kLengthOffset)); |
| 13393 | |
| 13394 | Register length_delta = scratch3; |
| 13395 | |
| 13396 | __ j(less_equal, &left_shorter); |
| 13397 | // Right string is shorter. Change scratch1 to be length of right string. |
| 13398 | __ sub(scratch1, Operand(length_delta)); |
| 13399 | __ bind(&left_shorter); |
| 13400 | |
| 13401 | Register min_length = scratch1; |
| 13402 | |
| 13403 | // If either length is zero, just compare lengths. |
| 13404 | __ test(min_length, Operand(min_length)); |
| 13405 | __ j(zero, &compare_lengths); |
| 13406 | |
| 13407 | // Change index to run from -min_length to -1 by adding min_length |
| 13408 | // to string start. This means that loop ends when index reaches zero, |
| 13409 | // which doesn't need an additional compare. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 13410 | __ SmiUntag(min_length); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13411 | __ lea(left, |
| 13412 | FieldOperand(left, |
| 13413 | min_length, times_1, |
| 13414 | SeqAsciiString::kHeaderSize)); |
| 13415 | __ lea(right, |
| 13416 | FieldOperand(right, |
| 13417 | min_length, times_1, |
| 13418 | SeqAsciiString::kHeaderSize)); |
| 13419 | __ neg(min_length); |
| 13420 | |
| 13421 | Register index = min_length; // index = -min_length; |
| 13422 | |
| 13423 | { |
| 13424 | // Compare loop. |
| 13425 | Label loop; |
| 13426 | __ bind(&loop); |
| 13427 | // Compare characters. |
| 13428 | __ mov_b(scratch2, Operand(left, index, times_1, 0)); |
| 13429 | __ cmpb(scratch2, Operand(right, index, times_1, 0)); |
| 13430 | __ j(not_equal, &result_not_equal); |
| 13431 | __ add(Operand(index), Immediate(1)); |
| 13432 | __ j(not_zero, &loop); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13433 | } |
| 13434 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13435 | // Compare lengths - strings up to min-length are equal. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13436 | __ bind(&compare_lengths); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13437 | __ test(length_delta, Operand(length_delta)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13438 | __ j(not_zero, &result_not_equal); |
| 13439 | |
| 13440 | // Result is EQUAL. |
| 13441 | ASSERT_EQ(0, EQUAL); |
| 13442 | ASSERT_EQ(0, kSmiTag); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13443 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13444 | __ ret(2 * kPointerSize); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13445 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13446 | __ bind(&result_not_equal); |
| 13447 | __ j(greater, &result_greater); |
| 13448 | |
| 13449 | // Result is LESS. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13450 | __ Set(eax, Immediate(Smi::FromInt(LESS))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13451 | __ ret(2 * kPointerSize); |
| 13452 | |
| 13453 | // Result is GREATER. |
| 13454 | __ bind(&result_greater); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13455 | __ Set(eax, Immediate(Smi::FromInt(GREATER))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13456 | __ ret(2 * kPointerSize); |
| 13457 | } |
| 13458 | |
| 13459 | |
| 13460 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 13461 | Label runtime; |
| 13462 | |
| 13463 | // Stack frame on entry. |
| 13464 | // esp[0]: return address |
| 13465 | // esp[4]: right string |
| 13466 | // esp[8]: left string |
| 13467 | |
| 13468 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // left |
| 13469 | __ mov(eax, Operand(esp, 1 * kPointerSize)); // right |
| 13470 | |
| 13471 | Label not_same; |
| 13472 | __ cmp(edx, Operand(eax)); |
| 13473 | __ j(not_equal, ¬_same); |
| 13474 | ASSERT_EQ(0, EQUAL); |
| 13475 | ASSERT_EQ(0, kSmiTag); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13476 | __ Set(eax, Immediate(Smi::FromInt(EQUAL))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13477 | __ IncrementCounter(&Counters::string_compare_native, 1); |
| 13478 | __ ret(2 * kPointerSize); |
| 13479 | |
| 13480 | __ bind(¬_same); |
| 13481 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 13482 | // Check that both objects are sequential ascii strings. |
| 13483 | __ JumpIfNotBothSequentialAsciiStrings(edx, eax, ecx, ebx, &runtime); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13484 | |
| 13485 | // Compare flat ascii strings. |
| 13486 | GenerateCompareFlatAsciiStrings(masm, edx, eax, ecx, ebx, edi); |
| 13487 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13488 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 13489 | // tagged as a small integer. |
| 13490 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 13491 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 13492 | } |
| 13493 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 13494 | #undef __ |
| 13495 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 13496 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 13497 | |
| 13498 | #endif // V8_TARGET_ARCH_IA32 |