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_ARM) |
| 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 | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 36 | #include "ic-inl.h" |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 37 | #include "jsregexp.h" |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 38 | #include "jump-target-light-inl.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 39 | #include "parser.h" |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 40 | #include "regexp-macro-assembler.h" |
| 41 | #include "regexp-stack.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 42 | #include "register-allocator-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 43 | #include "runtime.h" |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 44 | #include "scopes.h" |
sgjesse@chromium.org | 833cdd7 | 2010-02-26 10:06:16 +0000 | [diff] [blame] | 45 | #include "virtual-frame-inl.h" |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 46 | #include "virtual-frame-arm-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 47 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 48 | namespace v8 { |
| 49 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 50 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 51 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 52 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 53 | Label* slow, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 54 | Condition cc, |
| 55 | bool never_nan_nan); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 56 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 57 | Label* lhs_not_nan, |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 58 | Label* slow, |
| 59 | bool strict); |
| 60 | static void EmitTwoNonNanDoubleComparison(MacroAssembler* masm, Condition cc); |
| 61 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 62 | static void MultiplyByKnownInt(MacroAssembler* masm, |
| 63 | Register source, |
| 64 | Register destination, |
| 65 | int known_int); |
| 66 | static bool IsEasyToMultiplyBy(int x); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 67 | |
| 68 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 69 | #define __ ACCESS_MASM(masm_) |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 70 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 71 | // ------------------------------------------------------------------------- |
| 72 | // Platform-specific DeferredCode functions. |
| 73 | |
| 74 | void DeferredCode::SaveRegisters() { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 75 | // On ARM you either have a completely spilled frame or you |
| 76 | // handle it yourself, but at the moment there's no automation |
| 77 | // of registers and deferred code. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | |
| 81 | void DeferredCode::RestoreRegisters() { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | |
| 85 | // ------------------------------------------------------------------------- |
| 86 | // Platform-specific RuntimeCallHelper functions. |
| 87 | |
| 88 | void VirtualFrameRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const { |
| 89 | frame_state_->frame()->AssertIsSpilled(); |
| 90 | } |
| 91 | |
| 92 | |
| 93 | void VirtualFrameRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { |
| 94 | } |
| 95 | |
| 96 | |
| 97 | void ICRuntimeCallHelper::BeforeCall(MacroAssembler* masm) const { |
| 98 | masm->EnterInternalFrame(); |
| 99 | } |
| 100 | |
| 101 | |
| 102 | void ICRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { |
| 103 | masm->LeaveInternalFrame(); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 104 | } |
| 105 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 106 | |
| 107 | // ------------------------------------------------------------------------- |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 108 | // CodeGenState implementation. |
| 109 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 110 | CodeGenState::CodeGenState(CodeGenerator* owner) |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 111 | : owner_(owner), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 112 | true_target_(NULL), |
| 113 | false_target_(NULL), |
| 114 | previous_(NULL) { |
| 115 | owner_->set_state(this); |
| 116 | } |
| 117 | |
| 118 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 119 | CodeGenState::CodeGenState(CodeGenerator* owner, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 120 | JumpTarget* true_target, |
| 121 | JumpTarget* false_target) |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 122 | : owner_(owner), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 123 | true_target_(true_target), |
| 124 | false_target_(false_target), |
| 125 | previous_(owner->state()) { |
| 126 | owner_->set_state(this); |
| 127 | } |
| 128 | |
| 129 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 130 | CodeGenState::~CodeGenState() { |
| 131 | ASSERT(owner_->state() == this); |
| 132 | owner_->set_state(previous_); |
| 133 | } |
| 134 | |
| 135 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 136 | // ------------------------------------------------------------------------- |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 137 | // CodeGenerator implementation |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 138 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 139 | CodeGenerator::CodeGenerator(MacroAssembler* masm) |
| 140 | : deferred_(8), |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 141 | masm_(masm), |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 142 | info_(NULL), |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 143 | frame_(NULL), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 144 | allocator_(NULL), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 145 | cc_reg_(al), |
| 146 | state_(NULL), |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 147 | loop_nesting_(0), |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 148 | function_return_is_shadowed_(false) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | |
| 152 | // Calling conventions: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 153 | // fp: caller's frame pointer |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 154 | // sp: stack pointer |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 155 | // r1: called JS function |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 156 | // cp: callee's context |
| 157 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 158 | void CodeGenerator::Generate(CompilationInfo* info) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 159 | // Record the position for debugging purposes. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 160 | CodeForFunctionPosition(info->function()); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 161 | Comment cmnt(masm_, "[ function compiled by virtual frame code generator"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 162 | |
| 163 | // Initialize state. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 164 | info_ = info; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 165 | ASSERT(allocator_ == NULL); |
| 166 | RegisterAllocator register_allocator(this); |
| 167 | allocator_ = ®ister_allocator; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 168 | ASSERT(frame_ == NULL); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 169 | frame_ = new VirtualFrame(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 170 | cc_reg_ = al; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 171 | |
| 172 | // Adjust for function-level loop nesting. |
| 173 | ASSERT_EQ(0, loop_nesting_); |
| 174 | loop_nesting_ = info->loop_nesting(); |
| 175 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 176 | { |
| 177 | CodeGenState state(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 178 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 179 | // Entry: |
| 180 | // Stack: receiver, arguments |
| 181 | // lr: return address |
| 182 | // fp: caller's frame pointer |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 183 | // sp: stack pointer |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 184 | // r1: called JS function |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 185 | // cp: callee's context |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 186 | allocator_->Initialize(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 187 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 188 | #ifdef DEBUG |
| 189 | if (strlen(FLAG_stop_at) > 0 && |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 190 | info->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 191 | frame_->SpillAll(); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 192 | __ stop("stop-at"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 193 | } |
| 194 | #endif |
| 195 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 196 | if (info->mode() == CompilationInfo::PRIMARY) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 197 | frame_->Enter(); |
| 198 | // tos: code slot |
| 199 | |
| 200 | // Allocate space for locals and initialize them. This also checks |
| 201 | // for stack overflow. |
| 202 | frame_->AllocateStackSlots(); |
| 203 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 204 | VirtualFrame::SpilledScope spilled_scope(frame_); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 205 | int heap_slots = scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 206 | if (heap_slots > 0) { |
| 207 | // Allocate local context. |
| 208 | // Get outer context and create a new context based on it. |
| 209 | __ ldr(r0, frame_->Function()); |
| 210 | frame_->EmitPush(r0); |
| 211 | if (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| 212 | FastNewContextStub stub(heap_slots); |
| 213 | frame_->CallStub(&stub, 1); |
| 214 | } else { |
| 215 | frame_->CallRuntime(Runtime::kNewContext, 1); |
| 216 | } |
| 217 | |
| 218 | #ifdef DEBUG |
| 219 | JumpTarget verified_true; |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 220 | __ cmp(r0, cp); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 221 | verified_true.Branch(eq); |
| 222 | __ stop("NewContext: r0 is expected to be the same as cp"); |
| 223 | verified_true.Bind(); |
| 224 | #endif |
| 225 | // Update context local. |
| 226 | __ str(cp, frame_->Context()); |
| 227 | } |
| 228 | |
| 229 | // TODO(1241774): Improve this code: |
| 230 | // 1) only needed if we have a context |
| 231 | // 2) no need to recompute context ptr every single time |
| 232 | // 3) don't copy parameter operand code from SlotOperand! |
| 233 | { |
| 234 | Comment cmnt2(masm_, "[ copy context parameters into .context"); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 235 | // Note that iteration order is relevant here! If we have the same |
| 236 | // parameter twice (e.g., function (x, y, x)), and that parameter |
| 237 | // needs to be copied into the context, it must be the last argument |
| 238 | // passed to the parameter that needs to be copied. This is a rare |
| 239 | // case so we don't check for it, instead we rely on the copying |
| 240 | // order: such a parameter is copied repeatedly into the same |
| 241 | // context location and thus the last value is what is seen inside |
| 242 | // the function. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 243 | for (int i = 0; i < scope()->num_parameters(); i++) { |
| 244 | Variable* par = scope()->parameter(i); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 245 | Slot* slot = par->slot(); |
| 246 | if (slot != NULL && slot->type() == Slot::CONTEXT) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 247 | ASSERT(!scope()->is_global_scope()); // No params in global scope. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 248 | __ ldr(r1, frame_->ParameterAt(i)); |
| 249 | // Loads r2 with context; used below in RecordWrite. |
| 250 | __ str(r1, SlotOperand(slot, r2)); |
| 251 | // Load the offset into r3. |
| 252 | int slot_offset = |
| 253 | FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 254 | __ mov(r3, Operand(slot_offset)); |
| 255 | __ RecordWrite(r2, r3, r1); |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | // Store the arguments object. This must happen after context |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 261 | // initialization because the arguments object may be stored in |
| 262 | // the context. |
| 263 | if (ArgumentsMode() != NO_ARGUMENTS_ALLOCATION) { |
| 264 | StoreArgumentsObject(true); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | // Initialize ThisFunction reference if present. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 268 | if (scope()->is_function_scope() && scope()->function() != NULL) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 269 | __ mov(ip, Operand(Factory::the_hole_value())); |
| 270 | frame_->EmitPush(ip); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 271 | StoreToSlot(scope()->function()->slot(), NOT_CONST_INIT); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 272 | } |
| 273 | } else { |
| 274 | // When used as the secondary compiler for splitting, r1, cp, |
| 275 | // fp, and lr have been pushed on the stack. Adjust the virtual |
| 276 | // frame to match this state. |
| 277 | frame_->Adjust(4); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 278 | |
| 279 | // Bind all the bailout labels to the beginning of the function. |
| 280 | List<CompilationInfo::Bailout*>* bailouts = info->bailouts(); |
| 281 | for (int i = 0; i < bailouts->length(); i++) { |
| 282 | __ bind(bailouts->at(i)->label()); |
| 283 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 284 | } |
| 285 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 286 | // Initialize the function return target after the locals are set |
| 287 | // up, because it needs the expected frame height from the frame. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 288 | function_return_.SetExpectedHeight(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 289 | function_return_is_shadowed_ = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 290 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 291 | // Generate code to 'execute' declarations and initialize functions |
| 292 | // (source elements). In case of an illegal redeclaration we need to |
| 293 | // handle that instead of processing the declarations. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 294 | if (scope()->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 295 | Comment cmnt(masm_, "[ illegal redeclarations"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 296 | scope()->VisitIllegalRedeclaration(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 297 | } else { |
| 298 | Comment cmnt(masm_, "[ declarations"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 299 | ProcessDeclarations(scope()->declarations()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 300 | // Bail out if a stack-overflow exception occurred when processing |
| 301 | // declarations. |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 302 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 303 | } |
| 304 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 305 | if (FLAG_trace) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 306 | frame_->CallRuntime(Runtime::kTraceEnter, 0); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 307 | // Ignore the return value. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 308 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 309 | |
| 310 | // Compile the body of the function in a vanilla state. Don't |
| 311 | // bother compiling all the code if the scope has an illegal |
| 312 | // redeclaration. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 313 | if (!scope()->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 314 | Comment cmnt(masm_, "[ function body"); |
| 315 | #ifdef DEBUG |
| 316 | bool is_builtin = Bootstrapper::IsActive(); |
| 317 | bool should_trace = |
| 318 | is_builtin ? FLAG_trace_builtin_calls : FLAG_trace_calls; |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 319 | if (should_trace) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 320 | frame_->CallRuntime(Runtime::kDebugTrace, 0); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 321 | // Ignore the return value. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 322 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 323 | #endif |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 324 | VisitStatements(info->function()->body()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 325 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 326 | } |
| 327 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 328 | // Generate the return sequence if necessary. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 329 | if (has_valid_frame() || function_return_.is_linked()) { |
| 330 | if (!function_return_.is_linked()) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 331 | CodeForReturnPosition(info->function()); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 332 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 333 | // exit |
| 334 | // r0: result |
| 335 | // sp: stack pointer |
| 336 | // fp: frame pointer |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 337 | // cp: callee's context |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 338 | __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 339 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 340 | function_return_.Bind(); |
| 341 | if (FLAG_trace) { |
| 342 | // Push the return value on the stack as the parameter. |
| 343 | // Runtime::TraceExit returns the parameter as it is. |
| 344 | frame_->EmitPush(r0); |
| 345 | frame_->CallRuntime(Runtime::kTraceExit, 1); |
| 346 | } |
| 347 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 348 | #ifdef DEBUG |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 349 | // Add a label for checking the size of the code used for returning. |
| 350 | Label check_exit_codesize; |
| 351 | masm_->bind(&check_exit_codesize); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 352 | #endif |
| 353 | // Make sure that the constant pool is not emitted inside of the return |
| 354 | // sequence. |
| 355 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
| 356 | // Tear down the frame which will restore the caller's frame pointer and |
| 357 | // the link register. |
| 358 | frame_->Exit(); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 359 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 360 | // Here we use masm_-> instead of the __ macro to avoid the code coverage |
| 361 | // tool from instrumenting as we rely on the code size here. |
| 362 | int32_t sp_delta = (scope()->num_parameters() + 1) * kPointerSize; |
| 363 | masm_->add(sp, sp, Operand(sp_delta)); |
| 364 | masm_->Jump(lr); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 365 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 366 | #ifdef DEBUG |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 367 | // Check that the size of the code used for returning matches what is |
| 368 | // expected by the debugger. If the sp_delts above cannot be encoded in |
| 369 | // the add instruction the add will generate two instructions. |
| 370 | int return_sequence_length = |
| 371 | masm_->InstructionsGeneratedSince(&check_exit_codesize); |
| 372 | CHECK(return_sequence_length == Assembler::kJSReturnSequenceLength || |
| 373 | return_sequence_length == Assembler::kJSReturnSequenceLength + 1); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 374 | #endif |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 375 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 376 | } |
| 377 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 378 | // Adjust for function-level loop nesting. |
| 379 | ASSERT(loop_nesting_ == info->loop_nesting()); |
| 380 | loop_nesting_ = 0; |
| 381 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 382 | // Code generation state must be reset. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 383 | ASSERT(!has_cc()); |
| 384 | ASSERT(state_ == NULL); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 385 | ASSERT(loop_nesting() == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 386 | ASSERT(!function_return_is_shadowed_); |
| 387 | function_return_.Unuse(); |
| 388 | DeleteFrame(); |
| 389 | |
| 390 | // Process any deferred code using the register allocator. |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 391 | if (!HasStackOverflow()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 392 | ProcessDeferred(); |
| 393 | } |
| 394 | |
| 395 | allocator_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 399 | MemOperand CodeGenerator::SlotOperand(Slot* slot, Register tmp) { |
| 400 | // Currently, this assertion will fail if we try to assign to |
| 401 | // a constant variable that is constant because it is read-only |
| 402 | // (such as the variable referring to a named function expression). |
| 403 | // We need to implement assignments to read-only variables. |
| 404 | // Ideally, we should do this during AST generation (by converting |
| 405 | // such assignments into expression statements); however, in general |
| 406 | // we may not be able to make the decision until past AST generation, |
| 407 | // that is when the entire program is known. |
| 408 | ASSERT(slot != NULL); |
| 409 | int index = slot->index(); |
| 410 | switch (slot->type()) { |
| 411 | case Slot::PARAMETER: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 412 | return frame_->ParameterAt(index); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 413 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 414 | case Slot::LOCAL: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 415 | return frame_->LocalAt(index); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 416 | |
| 417 | case Slot::CONTEXT: { |
| 418 | // Follow the context chain if necessary. |
| 419 | ASSERT(!tmp.is(cp)); // do not overwrite context register |
| 420 | Register context = cp; |
| 421 | int chain_length = scope()->ContextChainLength(slot->var()->scope()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 422 | for (int i = 0; i < chain_length; i++) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 423 | // Load the closure. |
| 424 | // (All contexts, even 'with' contexts, have a closure, |
| 425 | // and it is the same for all contexts inside a function. |
| 426 | // There is no need to go to the function context first.) |
| 427 | __ ldr(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 428 | // Load the function context (which is the incoming, outer context). |
| 429 | __ ldr(tmp, FieldMemOperand(tmp, JSFunction::kContextOffset)); |
| 430 | context = tmp; |
| 431 | } |
| 432 | // We may have a 'with' context now. Get the function context. |
| 433 | // (In fact this mov may never be the needed, since the scope analysis |
| 434 | // may not permit a direct context access in this case and thus we are |
| 435 | // always at a function context. However it is safe to dereference be- |
| 436 | // cause the function context of a function context is itself. Before |
| 437 | // deleting this mov we should try to create a counter-example first, |
| 438 | // though...) |
| 439 | __ ldr(tmp, ContextOperand(context, Context::FCONTEXT_INDEX)); |
| 440 | return ContextOperand(tmp, index); |
| 441 | } |
| 442 | |
| 443 | default: |
| 444 | UNREACHABLE(); |
| 445 | return MemOperand(r0, 0); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 450 | MemOperand CodeGenerator::ContextSlotOperandCheckExtensions( |
| 451 | Slot* slot, |
| 452 | Register tmp, |
| 453 | Register tmp2, |
| 454 | JumpTarget* slow) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 455 | ASSERT(slot->type() == Slot::CONTEXT); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 456 | Register context = cp; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 457 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 458 | for (Scope* s = scope(); s != slot->var()->scope(); s = s->outer_scope()) { |
| 459 | if (s->num_heap_slots() > 0) { |
| 460 | if (s->calls_eval()) { |
| 461 | // Check that extension is NULL. |
| 462 | __ ldr(tmp2, ContextOperand(context, Context::EXTENSION_INDEX)); |
| 463 | __ tst(tmp2, tmp2); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 464 | slow->Branch(ne); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 465 | } |
| 466 | __ ldr(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 467 | __ ldr(tmp, FieldMemOperand(tmp, JSFunction::kContextOffset)); |
| 468 | context = tmp; |
| 469 | } |
| 470 | } |
| 471 | // Check that last extension is NULL. |
| 472 | __ ldr(tmp2, ContextOperand(context, Context::EXTENSION_INDEX)); |
| 473 | __ tst(tmp2, tmp2); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 474 | slow->Branch(ne); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 475 | __ ldr(tmp, ContextOperand(context, Context::FCONTEXT_INDEX)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 476 | return ContextOperand(tmp, slot->index()); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 480 | // Loads a value on TOS. If it is a boolean value, the result may have been |
| 481 | // (partially) translated into branches, or it may have set the condition |
| 482 | // code register. If force_cc is set, the value is forced to set the |
| 483 | // condition code register and no value is pushed. If the condition code |
| 484 | // register was set, has_cc() is true and cc_reg_ contains the condition to |
| 485 | // test for 'true'. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 486 | void CodeGenerator::LoadCondition(Expression* x, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 487 | JumpTarget* true_target, |
| 488 | JumpTarget* false_target, |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 489 | bool force_cc) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 490 | ASSERT(!has_cc()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 491 | int original_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 492 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 493 | { CodeGenState new_state(this, true_target, false_target); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 494 | Visit(x); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 495 | |
| 496 | // If we hit a stack overflow, we may not have actually visited |
| 497 | // the expression. In that case, we ensure that we have a |
| 498 | // valid-looking frame state because we will continue to generate |
| 499 | // code as we unwind the C++ stack. |
| 500 | // |
| 501 | // It's possible to have both a stack overflow and a valid frame |
| 502 | // state (eg, a subexpression overflowed, visiting it returned |
| 503 | // with a dummied frame state, and visiting this expression |
| 504 | // returned with a normal-looking state). |
| 505 | if (HasStackOverflow() && |
| 506 | has_valid_frame() && |
| 507 | !has_cc() && |
| 508 | frame_->height() == original_height) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 509 | frame_->SpillAll(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 510 | true_target->Jump(); |
| 511 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 512 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 513 | if (force_cc && frame_ != NULL && !has_cc()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 514 | // Convert the TOS value to a boolean in the condition code register. |
| 515 | ToBoolean(true_target, false_target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 516 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 517 | ASSERT(!force_cc || !has_valid_frame() || has_cc()); |
| 518 | ASSERT(!has_valid_frame() || |
| 519 | (has_cc() && frame_->height() == original_height) || |
| 520 | (!has_cc() && frame_->height() == original_height + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 521 | } |
| 522 | |
| 523 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 524 | void CodeGenerator::Load(Expression* expr) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 525 | #ifdef DEBUG |
| 526 | int original_height = frame_->height(); |
| 527 | #endif |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 528 | JumpTarget true_target; |
| 529 | JumpTarget false_target; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 530 | LoadCondition(expr, &true_target, &false_target, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 531 | |
| 532 | if (has_cc()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 533 | // Convert cc_reg_ into a boolean value. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 534 | VirtualFrame::SpilledScope scope(frame_); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 535 | JumpTarget loaded; |
| 536 | JumpTarget materialize_true; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 537 | materialize_true.Branch(cc_reg_); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 538 | __ LoadRoot(r0, Heap::kFalseValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 539 | frame_->EmitPush(r0); |
| 540 | loaded.Jump(); |
| 541 | materialize_true.Bind(); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 542 | __ LoadRoot(r0, Heap::kTrueValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 543 | frame_->EmitPush(r0); |
| 544 | loaded.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 545 | cc_reg_ = al; |
| 546 | } |
| 547 | |
| 548 | if (true_target.is_linked() || false_target.is_linked()) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 549 | VirtualFrame::SpilledScope scope(frame_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 550 | // We have at least one condition value that has been "translated" |
| 551 | // into a branch, thus it needs to be loaded explicitly. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 552 | JumpTarget loaded; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 553 | if (frame_ != NULL) { |
| 554 | loaded.Jump(); // Don't lose the current TOS. |
| 555 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 556 | bool both = true_target.is_linked() && false_target.is_linked(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 557 | // Load "true" if necessary. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 558 | if (true_target.is_linked()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 559 | true_target.Bind(); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 560 | __ LoadRoot(r0, Heap::kTrueValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 561 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 562 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 563 | // If both "true" and "false" need to be loaded jump across the code for |
| 564 | // "false". |
| 565 | if (both) { |
| 566 | loaded.Jump(); |
| 567 | } |
| 568 | // Load "false" if necessary. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 569 | if (false_target.is_linked()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 570 | false_target.Bind(); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 571 | __ LoadRoot(r0, Heap::kFalseValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 572 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 573 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 574 | // A value is loaded on all paths reaching this point. |
| 575 | loaded.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 576 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 577 | ASSERT(has_valid_frame()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 578 | ASSERT(!has_cc()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 579 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 583 | void CodeGenerator::LoadGlobal() { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 584 | Register reg = frame_->GetTOSRegister(); |
| 585 | __ ldr(reg, GlobalObject()); |
| 586 | frame_->EmitPush(reg); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 590 | void CodeGenerator::LoadGlobalReceiver(Register scratch) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 591 | VirtualFrame::SpilledScope spilled_scope(frame_); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 592 | __ ldr(scratch, ContextOperand(cp, Context::GLOBAL_INDEX)); |
| 593 | __ ldr(scratch, |
| 594 | FieldMemOperand(scratch, GlobalObject::kGlobalReceiverOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 595 | frame_->EmitPush(scratch); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 599 | ArgumentsAllocationMode CodeGenerator::ArgumentsMode() { |
| 600 | if (scope()->arguments() == NULL) return NO_ARGUMENTS_ALLOCATION; |
| 601 | ASSERT(scope()->arguments_shadow() != NULL); |
| 602 | // We don't want to do lazy arguments allocation for functions that |
| 603 | // have heap-allocated contexts, because it interfers with the |
| 604 | // uninitialized const tracking in the context objects. |
| 605 | return (scope()->num_heap_slots() > 0) |
| 606 | ? EAGER_ARGUMENTS_ALLOCATION |
| 607 | : LAZY_ARGUMENTS_ALLOCATION; |
| 608 | } |
| 609 | |
| 610 | |
| 611 | void CodeGenerator::StoreArgumentsObject(bool initial) { |
| 612 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 613 | |
| 614 | ArgumentsAllocationMode mode = ArgumentsMode(); |
| 615 | ASSERT(mode != NO_ARGUMENTS_ALLOCATION); |
| 616 | |
| 617 | Comment cmnt(masm_, "[ store arguments object"); |
| 618 | if (mode == LAZY_ARGUMENTS_ALLOCATION && initial) { |
| 619 | // When using lazy arguments allocation, we store the hole value |
| 620 | // as a sentinel indicating that the arguments object hasn't been |
| 621 | // allocated yet. |
| 622 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 623 | frame_->EmitPush(ip); |
| 624 | } else { |
| 625 | ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT); |
| 626 | __ ldr(r2, frame_->Function()); |
| 627 | // The receiver is below the arguments, the return address, and the |
| 628 | // frame pointer on the stack. |
| 629 | const int kReceiverDisplacement = 2 + scope()->num_parameters(); |
| 630 | __ add(r1, fp, Operand(kReceiverDisplacement * kPointerSize)); |
| 631 | __ mov(r0, Operand(Smi::FromInt(scope()->num_parameters()))); |
| 632 | frame_->Adjust(3); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 633 | __ Push(r2, r1, r0); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 634 | frame_->CallStub(&stub, 3); |
| 635 | frame_->EmitPush(r0); |
| 636 | } |
| 637 | |
| 638 | Variable* arguments = scope()->arguments()->var(); |
| 639 | Variable* shadow = scope()->arguments_shadow()->var(); |
| 640 | ASSERT(arguments != NULL && arguments->slot() != NULL); |
| 641 | ASSERT(shadow != NULL && shadow->slot() != NULL); |
| 642 | JumpTarget done; |
| 643 | if (mode == LAZY_ARGUMENTS_ALLOCATION && !initial) { |
| 644 | // We have to skip storing into the arguments slot if it has |
| 645 | // already been written to. This can happen if the a function |
| 646 | // has a local variable named 'arguments'. |
| 647 | LoadFromSlot(scope()->arguments()->var()->slot(), NOT_INSIDE_TYPEOF); |
| 648 | frame_->EmitPop(r0); |
| 649 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 650 | __ cmp(r0, ip); |
| 651 | done.Branch(ne); |
| 652 | } |
| 653 | StoreToSlot(arguments->slot(), NOT_CONST_INIT); |
| 654 | if (mode == LAZY_ARGUMENTS_ALLOCATION) done.Bind(); |
| 655 | StoreToSlot(shadow->slot(), NOT_CONST_INIT); |
| 656 | } |
| 657 | |
| 658 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 659 | void CodeGenerator::LoadTypeofExpression(Expression* expr) { |
| 660 | // Special handling of identifiers as subexpressions of typeof. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 661 | Variable* variable = expr->AsVariableProxy()->AsVariable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 662 | if (variable != NULL && !variable->is_this() && variable->is_global()) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 663 | // For a global variable we build the property reference |
| 664 | // <global>.<variable> and perform a (regular non-contextual) property |
| 665 | // load to make sure we do not get reference errors. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 666 | Slot global(variable, Slot::CONTEXT, Context::GLOBAL_INDEX); |
| 667 | Literal key(variable->name()); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 668 | Property property(&global, &key, RelocInfo::kNoPosition); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 669 | Reference ref(this, &property); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 670 | ref.GetValue(); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 671 | } else if (variable != NULL && variable->slot() != NULL) { |
| 672 | // For a variable that rewrites to a slot, we signal it is the immediate |
| 673 | // subexpression of a typeof. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 674 | LoadFromSlotCheckForArguments(variable->slot(), INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 675 | } else { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 676 | // Anything else can be handled normally. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 677 | Load(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | |
| 681 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 682 | Reference::Reference(CodeGenerator* cgen, |
| 683 | Expression* expression, |
| 684 | bool persist_after_get) |
| 685 | : cgen_(cgen), |
| 686 | expression_(expression), |
| 687 | type_(ILLEGAL), |
| 688 | persist_after_get_(persist_after_get) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 689 | cgen->LoadReference(this); |
| 690 | } |
| 691 | |
| 692 | |
| 693 | Reference::~Reference() { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 694 | ASSERT(is_unloaded() || is_illegal()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 698 | void CodeGenerator::LoadReference(Reference* ref) { |
| 699 | Comment cmnt(masm_, "[ LoadReference"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 700 | Expression* e = ref->expression(); |
| 701 | Property* property = e->AsProperty(); |
| 702 | Variable* var = e->AsVariableProxy()->AsVariable(); |
| 703 | |
| 704 | if (property != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 705 | // The expression is either a property or a variable proxy that rewrites |
| 706 | // to a property. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 707 | Load(property->obj()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 708 | if (property->key()->IsPropertyName()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 709 | ref->set_type(Reference::NAMED); |
| 710 | } else { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 711 | Load(property->key()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 712 | ref->set_type(Reference::KEYED); |
| 713 | } |
| 714 | } else if (var != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 715 | // The expression is a variable proxy that does not rewrite to a |
| 716 | // property. Global variables are treated as named property references. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 717 | if (var->is_global()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 718 | LoadGlobal(); |
| 719 | ref->set_type(Reference::NAMED); |
| 720 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 721 | ASSERT(var->slot() != NULL); |
| 722 | ref->set_type(Reference::SLOT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 723 | } |
| 724 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 725 | // Anything else is a runtime error. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 726 | Load(e); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 727 | frame_->CallRuntime(Runtime::kThrowReferenceError, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 728 | } |
| 729 | } |
| 730 | |
| 731 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 732 | void CodeGenerator::UnloadReference(Reference* ref) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 733 | int size = ref->size(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 734 | ref->set_unloaded(); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 735 | if (size == 0) return; |
| 736 | |
| 737 | // Pop a reference from the stack while preserving TOS. |
| 738 | VirtualFrame::RegisterAllocationScope scope(this); |
| 739 | Comment cmnt(masm_, "[ UnloadReference"); |
| 740 | if (size > 0) { |
| 741 | Register tos = frame_->PopToRegister(); |
| 742 | frame_->Drop(size); |
| 743 | frame_->EmitPush(tos); |
| 744 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 748 | // ECMA-262, section 9.2, page 30: ToBoolean(). Convert the given |
| 749 | // register to a boolean in the condition code register. The code |
| 750 | // may jump to 'false_target' in case the register converts to 'false'. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 751 | void CodeGenerator::ToBoolean(JumpTarget* true_target, |
| 752 | JumpTarget* false_target) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 753 | VirtualFrame::SpilledScope spilled_scope(frame_); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 754 | // Note: The generated code snippet does not change stack variables. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 755 | // Only the condition code should be set. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 756 | frame_->EmitPop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 757 | |
| 758 | // Fast case checks |
| 759 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 760 | // Check if the value is 'false'. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 761 | __ LoadRoot(ip, Heap::kFalseValueRootIndex); |
| 762 | __ cmp(r0, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 763 | false_target->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 764 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 765 | // Check if the value is 'true'. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 766 | __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| 767 | __ cmp(r0, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 768 | true_target->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 769 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 770 | // Check if the value is 'undefined'. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 771 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 772 | __ cmp(r0, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 773 | false_target->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 774 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 775 | // Check if the value is a smi. |
| 776 | __ cmp(r0, Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 777 | false_target->Branch(eq); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 778 | __ tst(r0, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 779 | true_target->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 780 | |
| 781 | // Slow case: call the runtime. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 782 | frame_->EmitPush(r0); |
| 783 | frame_->CallRuntime(Runtime::kToBool, 1); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 784 | // Convert the result (r0) to a condition code. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 785 | __ LoadRoot(ip, Heap::kFalseValueRootIndex); |
| 786 | __ cmp(r0, ip); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 787 | |
| 788 | cc_reg_ = ne; |
| 789 | } |
| 790 | |
| 791 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 792 | void CodeGenerator::GenericBinaryOperation(Token::Value op, |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 793 | OverwriteMode overwrite_mode, |
| 794 | int constant_rhs) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 795 | VirtualFrame::SpilledScope spilled_scope(frame_); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 796 | // sp[0] : y |
| 797 | // sp[1] : x |
| 798 | // result : r0 |
| 799 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 800 | // Stub is entered with a call: 'return address' is in lr. |
| 801 | switch (op) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 802 | case Token::ADD: |
| 803 | case Token::SUB: |
| 804 | case Token::MUL: |
| 805 | case Token::DIV: |
| 806 | case Token::MOD: |
| 807 | case Token::BIT_OR: |
| 808 | case Token::BIT_AND: |
| 809 | case Token::BIT_XOR: |
| 810 | case Token::SHL: |
| 811 | case Token::SHR: |
| 812 | case Token::SAR: { |
| 813 | frame_->EmitPop(r0); // r0 : y |
| 814 | frame_->EmitPop(r1); // r1 : x |
| 815 | GenericBinaryOpStub stub(op, overwrite_mode, r1, r0, constant_rhs); |
| 816 | frame_->CallStub(&stub, 0); |
| 817 | break; |
| 818 | } |
| 819 | |
| 820 | case Token::COMMA: |
| 821 | frame_->EmitPop(r0); |
| 822 | // Simply discard left value. |
| 823 | frame_->Drop(); |
| 824 | break; |
| 825 | |
| 826 | default: |
| 827 | // Other cases should have been handled before this point. |
| 828 | UNREACHABLE(); |
| 829 | break; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | |
| 834 | void CodeGenerator::VirtualFrameBinaryOperation(Token::Value op, |
| 835 | OverwriteMode overwrite_mode, |
| 836 | int constant_rhs) { |
| 837 | // top of virtual frame: y |
| 838 | // 2nd elt. on virtual frame : x |
| 839 | // result : top of virtual frame |
| 840 | |
| 841 | // Stub is entered with a call: 'return address' is in lr. |
| 842 | switch (op) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 843 | case Token::ADD: // fall through. |
| 844 | case Token::SUB: // fall through. |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 845 | case Token::MUL: |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 846 | case Token::DIV: |
| 847 | case Token::MOD: |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 848 | case Token::BIT_OR: |
| 849 | case Token::BIT_AND: |
| 850 | case Token::BIT_XOR: |
| 851 | case Token::SHL: |
| 852 | case Token::SHR: |
| 853 | case Token::SAR: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 854 | Register rhs = frame_->PopToRegister(); |
| 855 | Register lhs = frame_->PopToRegister(rhs); // Don't pop to rhs register. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 856 | GenericBinaryOpStub stub(op, overwrite_mode, lhs, rhs, constant_rhs); |
| 857 | frame_->SpillAll(); |
| 858 | frame_->CallStub(&stub, 0); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 859 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 860 | break; |
| 861 | } |
| 862 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 863 | case Token::COMMA: { |
| 864 | Register scratch = frame_->PopToRegister(); |
| 865 | // Simply discard left value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 866 | frame_->Drop(); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 867 | frame_->EmitPush(scratch); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 868 | break; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 869 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 870 | |
| 871 | default: |
| 872 | // Other cases should have been handled before this point. |
| 873 | UNREACHABLE(); |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 879 | class DeferredInlineSmiOperation: public DeferredCode { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 880 | public: |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 881 | DeferredInlineSmiOperation(Token::Value op, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 882 | int value, |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 883 | bool reversed, |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 884 | OverwriteMode overwrite_mode, |
| 885 | Register tos) |
sgjesse@chromium.org | 755c5b1 | 2009-05-29 11:04:38 +0000 | [diff] [blame] | 886 | : op_(op), |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 887 | value_(value), |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 888 | reversed_(reversed), |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 889 | overwrite_mode_(overwrite_mode), |
| 890 | tos_register_(tos) { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 891 | set_comment("[ DeferredInlinedSmiOperation"); |
| 892 | } |
| 893 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 894 | virtual void Generate(); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 895 | |
| 896 | private: |
| 897 | Token::Value op_; |
| 898 | int value_; |
| 899 | bool reversed_; |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 900 | OverwriteMode overwrite_mode_; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 901 | Register tos_register_; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 902 | }; |
| 903 | |
| 904 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 905 | void DeferredInlineSmiOperation::Generate() { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 906 | Register lhs = r1; |
| 907 | Register rhs = r0; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 908 | switch (op_) { |
| 909 | case Token::ADD: { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 910 | // Revert optimistic add. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 911 | if (reversed_) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 912 | __ sub(r0, tos_register_, Operand(Smi::FromInt(value_))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 913 | __ mov(r1, Operand(Smi::FromInt(value_))); |
| 914 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 915 | __ sub(r1, tos_register_, Operand(Smi::FromInt(value_))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 916 | __ mov(r0, Operand(Smi::FromInt(value_))); |
| 917 | } |
| 918 | break; |
| 919 | } |
| 920 | |
| 921 | case Token::SUB: { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 922 | // Revert optimistic sub. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 923 | if (reversed_) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 924 | __ rsb(r0, tos_register_, Operand(Smi::FromInt(value_))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 925 | __ mov(r1, Operand(Smi::FromInt(value_))); |
| 926 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 927 | __ add(r1, tos_register_, Operand(Smi::FromInt(value_))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 928 | __ mov(r0, Operand(Smi::FromInt(value_))); |
| 929 | } |
| 930 | break; |
| 931 | } |
| 932 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 933 | // For these operations there is no optimistic operation that needs to be |
| 934 | // reverted. |
| 935 | case Token::MUL: |
| 936 | case Token::MOD: |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 937 | case Token::BIT_OR: |
| 938 | case Token::BIT_XOR: |
| 939 | case Token::BIT_AND: { |
| 940 | if (reversed_) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 941 | if (tos_register_.is(r0)) { |
| 942 | __ mov(r1, Operand(Smi::FromInt(value_))); |
| 943 | } else { |
| 944 | ASSERT(tos_register_.is(r1)); |
| 945 | __ mov(r0, Operand(Smi::FromInt(value_))); |
| 946 | lhs = r0; |
| 947 | rhs = r1; |
| 948 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 949 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 950 | if (tos_register_.is(r1)) { |
| 951 | __ mov(r0, Operand(Smi::FromInt(value_))); |
| 952 | } else { |
| 953 | ASSERT(tos_register_.is(r0)); |
| 954 | __ mov(r1, Operand(Smi::FromInt(value_))); |
| 955 | lhs = r0; |
| 956 | rhs = r1; |
| 957 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 958 | } |
| 959 | break; |
| 960 | } |
| 961 | |
| 962 | case Token::SHL: |
| 963 | case Token::SHR: |
| 964 | case Token::SAR: { |
| 965 | if (!reversed_) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 966 | if (tos_register_.is(r1)) { |
| 967 | __ mov(r0, Operand(Smi::FromInt(value_))); |
| 968 | } else { |
| 969 | ASSERT(tos_register_.is(r0)); |
| 970 | __ mov(r1, Operand(Smi::FromInt(value_))); |
| 971 | lhs = r0; |
| 972 | rhs = r1; |
| 973 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 974 | } else { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 975 | UNREACHABLE(); // Should have been handled in SmiOperation. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 976 | } |
| 977 | break; |
| 978 | } |
| 979 | |
| 980 | default: |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 981 | // Other cases should have been handled before this point. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 982 | UNREACHABLE(); |
| 983 | break; |
| 984 | } |
| 985 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 986 | GenericBinaryOpStub stub(op_, overwrite_mode_, lhs, rhs, value_); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 987 | __ CallStub(&stub); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 988 | // The generic stub returns its value in r0, but that's not |
| 989 | // necessarily what we want. We want whatever the inlined code |
| 990 | // expected, which is that the answer is in the same register as |
| 991 | // the operand was. |
| 992 | __ Move(tos_register_, r0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 996 | static bool PopCountLessThanEqual2(unsigned int x) { |
| 997 | x &= x - 1; |
| 998 | return (x & (x - 1)) == 0; |
| 999 | } |
| 1000 | |
| 1001 | |
| 1002 | // Returns the index of the lowest bit set. |
| 1003 | static int BitPosition(unsigned x) { |
| 1004 | int bit_posn = 0; |
| 1005 | while ((x & 0xf) == 0) { |
| 1006 | bit_posn += 4; |
| 1007 | x >>= 4; |
| 1008 | } |
| 1009 | while ((x & 1) == 0) { |
| 1010 | bit_posn++; |
| 1011 | x >>= 1; |
| 1012 | } |
| 1013 | return bit_posn; |
| 1014 | } |
| 1015 | |
| 1016 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 1017 | void CodeGenerator::SmiOperation(Token::Value op, |
| 1018 | Handle<Object> value, |
| 1019 | bool reversed, |
| 1020 | OverwriteMode mode) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1021 | int int_value = Smi::cast(*value)->value(); |
| 1022 | |
| 1023 | bool something_to_inline; |
| 1024 | switch (op) { |
| 1025 | case Token::ADD: |
| 1026 | case Token::SUB: |
| 1027 | case Token::BIT_AND: |
| 1028 | case Token::BIT_OR: |
| 1029 | case Token::BIT_XOR: { |
| 1030 | something_to_inline = true; |
| 1031 | break; |
| 1032 | } |
| 1033 | case Token::SHL: |
| 1034 | case Token::SHR: |
| 1035 | case Token::SAR: { |
| 1036 | if (reversed) { |
| 1037 | something_to_inline = false; |
| 1038 | } else { |
| 1039 | something_to_inline = true; |
| 1040 | } |
| 1041 | break; |
| 1042 | } |
| 1043 | case Token::MOD: { |
| 1044 | if (reversed || int_value < 2 || !IsPowerOf2(int_value)) { |
| 1045 | something_to_inline = false; |
| 1046 | } else { |
| 1047 | something_to_inline = true; |
| 1048 | } |
| 1049 | break; |
| 1050 | } |
| 1051 | case Token::MUL: { |
| 1052 | if (!IsEasyToMultiplyBy(int_value)) { |
| 1053 | something_to_inline = false; |
| 1054 | } else { |
| 1055 | something_to_inline = true; |
| 1056 | } |
| 1057 | break; |
| 1058 | } |
| 1059 | default: { |
| 1060 | something_to_inline = false; |
| 1061 | break; |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | if (!something_to_inline) { |
| 1066 | if (!reversed) { |
| 1067 | // Push the rhs onto the virtual frame by putting it in a TOS register. |
| 1068 | Register rhs = frame_->GetTOSRegister(); |
| 1069 | __ mov(rhs, Operand(value)); |
| 1070 | frame_->EmitPush(rhs); |
| 1071 | VirtualFrameBinaryOperation(op, mode, int_value); |
| 1072 | } else { |
| 1073 | // Pop the rhs, then push lhs and rhs in the right order. Only performs |
| 1074 | // at most one pop, the rest takes place in TOS registers. |
| 1075 | Register lhs = frame_->GetTOSRegister(); // Get reg for pushing. |
| 1076 | Register rhs = frame_->PopToRegister(lhs); // Don't use lhs for this. |
| 1077 | __ mov(lhs, Operand(value)); |
| 1078 | frame_->EmitPush(lhs); |
| 1079 | frame_->EmitPush(rhs); |
| 1080 | VirtualFrameBinaryOperation(op, mode, kUnknownIntValue); |
| 1081 | } |
| 1082 | return; |
| 1083 | } |
| 1084 | |
| 1085 | // We move the top of stack to a register (normally no move is invoved). |
| 1086 | Register tos = frame_->PopToRegister(); |
| 1087 | // All other registers are spilled. The deferred code expects one argument |
| 1088 | // in a register and all other values are flushed to the stack. The |
| 1089 | // answer is returned in the same register that the top of stack argument was |
| 1090 | // in. |
| 1091 | frame_->SpillAll(); |
| 1092 | |
| 1093 | switch (op) { |
| 1094 | case Token::ADD: { |
| 1095 | DeferredCode* deferred = |
| 1096 | new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos); |
| 1097 | |
| 1098 | __ add(tos, tos, Operand(value), SetCC); |
| 1099 | deferred->Branch(vs); |
| 1100 | __ tst(tos, Operand(kSmiTagMask)); |
| 1101 | deferred->Branch(ne); |
| 1102 | deferred->BindExit(); |
| 1103 | frame_->EmitPush(tos); |
| 1104 | break; |
| 1105 | } |
| 1106 | |
| 1107 | case Token::SUB: { |
| 1108 | DeferredCode* deferred = |
| 1109 | new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos); |
| 1110 | |
| 1111 | if (reversed) { |
| 1112 | __ rsb(tos, tos, Operand(value), SetCC); |
| 1113 | } else { |
| 1114 | __ sub(tos, tos, Operand(value), SetCC); |
| 1115 | } |
| 1116 | deferred->Branch(vs); |
| 1117 | __ tst(tos, Operand(kSmiTagMask)); |
| 1118 | deferred->Branch(ne); |
| 1119 | deferred->BindExit(); |
| 1120 | frame_->EmitPush(tos); |
| 1121 | break; |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | case Token::BIT_OR: |
| 1126 | case Token::BIT_XOR: |
| 1127 | case Token::BIT_AND: { |
| 1128 | DeferredCode* deferred = |
| 1129 | new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos); |
| 1130 | __ tst(tos, Operand(kSmiTagMask)); |
| 1131 | deferred->Branch(ne); |
| 1132 | switch (op) { |
| 1133 | case Token::BIT_OR: __ orr(tos, tos, Operand(value)); break; |
| 1134 | case Token::BIT_XOR: __ eor(tos, tos, Operand(value)); break; |
| 1135 | case Token::BIT_AND: __ and_(tos, tos, Operand(value)); break; |
| 1136 | default: UNREACHABLE(); |
| 1137 | } |
| 1138 | deferred->BindExit(); |
| 1139 | frame_->EmitPush(tos); |
| 1140 | break; |
| 1141 | } |
| 1142 | |
| 1143 | case Token::SHL: |
| 1144 | case Token::SHR: |
| 1145 | case Token::SAR: { |
| 1146 | ASSERT(!reversed); |
| 1147 | Register scratch = VirtualFrame::scratch0(); |
| 1148 | Register scratch2 = VirtualFrame::scratch1(); |
| 1149 | int shift_value = int_value & 0x1f; // least significant 5 bits |
| 1150 | DeferredCode* deferred = |
| 1151 | new DeferredInlineSmiOperation(op, shift_value, false, mode, tos); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1152 | uint32_t problematic_mask = kSmiTagMask; |
| 1153 | // For unsigned shift by zero all negative smis are problematic. |
| 1154 | if (shift_value == 0 && op == Token::SHR) problematic_mask |= 0x80000000; |
| 1155 | __ tst(tos, Operand(problematic_mask)); |
| 1156 | deferred->Branch(ne); // Go slow for problematic input. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1157 | switch (op) { |
| 1158 | case Token::SHL: { |
| 1159 | if (shift_value != 0) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1160 | int adjusted_shift = shift_value - kSmiTagSize; |
| 1161 | ASSERT(adjusted_shift >= 0); |
| 1162 | if (adjusted_shift != 0) { |
| 1163 | __ mov(scratch, Operand(tos, LSL, adjusted_shift)); |
| 1164 | // Check that the *signed* result fits in a smi. |
| 1165 | __ add(scratch2, scratch, Operand(0x40000000), SetCC); |
| 1166 | deferred->Branch(mi); |
| 1167 | __ mov(tos, Operand(scratch, LSL, kSmiTagSize)); |
| 1168 | } else { |
| 1169 | // Check that the *signed* result fits in a smi. |
| 1170 | __ add(scratch2, tos, Operand(0x40000000), SetCC); |
| 1171 | deferred->Branch(mi); |
| 1172 | __ mov(tos, Operand(tos, LSL, kSmiTagSize)); |
| 1173 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1174 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1175 | break; |
| 1176 | } |
| 1177 | case Token::SHR: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1178 | if (shift_value != 0) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1179 | __ mov(scratch, Operand(tos, ASR, kSmiTagSize)); // Remove tag. |
| 1180 | // LSR by immediate 0 means shifting 32 bits. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1181 | __ mov(scratch, Operand(scratch, LSR, shift_value)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1182 | if (shift_value == 1) { |
| 1183 | // check that the *unsigned* result fits in a smi |
| 1184 | // neither of the two high-order bits can be set: |
| 1185 | // - 0x80000000: high bit would be lost when smi tagging |
| 1186 | // - 0x40000000: this number would convert to negative when |
| 1187 | // smi tagging these two cases can only happen with shifts |
| 1188 | // by 0 or 1 when handed a valid smi |
| 1189 | __ tst(scratch, Operand(0xc0000000)); |
| 1190 | deferred->Branch(ne); |
| 1191 | } |
| 1192 | __ mov(tos, Operand(scratch, LSL, kSmiTagSize)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1193 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1194 | break; |
| 1195 | } |
| 1196 | case Token::SAR: { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1197 | // In the ARM instructions set, ASR by immediate 0 means shifting 32 |
| 1198 | // bits. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1199 | if (shift_value != 0) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1200 | // Do the shift and the tag removal in one operation. If the shift |
| 1201 | // is 31 bits (the highest possible value) then we emit the |
| 1202 | // instruction as a shift by 0 which means shift arithmetically by |
| 1203 | // 32. |
| 1204 | __ mov(tos, Operand(tos, ASR, (kSmiTagSize + shift_value) & 0x1f)); |
| 1205 | // Put tag back. |
| 1206 | __ mov(tos, Operand(tos, LSL, kSmiTagSize)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1207 | } |
| 1208 | break; |
| 1209 | } |
| 1210 | default: UNREACHABLE(); |
| 1211 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1212 | deferred->BindExit(); |
| 1213 | frame_->EmitPush(tos); |
| 1214 | break; |
| 1215 | } |
| 1216 | |
| 1217 | case Token::MOD: { |
| 1218 | ASSERT(!reversed); |
| 1219 | ASSERT(int_value >= 2); |
| 1220 | ASSERT(IsPowerOf2(int_value)); |
| 1221 | DeferredCode* deferred = |
| 1222 | new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos); |
| 1223 | unsigned mask = (0x80000000u | kSmiTagMask); |
| 1224 | __ tst(tos, Operand(mask)); |
| 1225 | deferred->Branch(ne); // Go to deferred code on non-Smis and negative. |
| 1226 | mask = (int_value << kSmiTagSize) - 1; |
| 1227 | __ and_(tos, tos, Operand(mask)); |
| 1228 | deferred->BindExit(); |
| 1229 | frame_->EmitPush(tos); |
| 1230 | break; |
| 1231 | } |
| 1232 | |
| 1233 | case Token::MUL: { |
| 1234 | ASSERT(IsEasyToMultiplyBy(int_value)); |
| 1235 | DeferredCode* deferred = |
| 1236 | new DeferredInlineSmiOperation(op, int_value, reversed, mode, tos); |
| 1237 | unsigned max_smi_that_wont_overflow = Smi::kMaxValue / int_value; |
| 1238 | max_smi_that_wont_overflow <<= kSmiTagSize; |
| 1239 | unsigned mask = 0x80000000u; |
| 1240 | while ((mask & max_smi_that_wont_overflow) == 0) { |
| 1241 | mask |= mask >> 1; |
| 1242 | } |
| 1243 | mask |= kSmiTagMask; |
| 1244 | // This does a single mask that checks for a too high value in a |
| 1245 | // conservative way and for a non-Smi. It also filters out negative |
| 1246 | // numbers, unfortunately, but since this code is inline we prefer |
| 1247 | // brevity to comprehensiveness. |
| 1248 | __ tst(tos, Operand(mask)); |
| 1249 | deferred->Branch(ne); |
| 1250 | MultiplyByKnownInt(masm_, tos, tos, int_value); |
| 1251 | deferred->BindExit(); |
| 1252 | frame_->EmitPush(tos); |
| 1253 | break; |
| 1254 | } |
| 1255 | |
| 1256 | default: |
| 1257 | UNREACHABLE(); |
| 1258 | break; |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1263 | void CodeGenerator::Comparison(Condition cc, |
| 1264 | Expression* left, |
| 1265 | Expression* right, |
| 1266 | bool strict) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1267 | VirtualFrame::RegisterAllocationScope scope(this); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1268 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1269 | if (left != NULL) Load(left); |
| 1270 | if (right != NULL) Load(right); |
| 1271 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1272 | // sp[0] : y |
| 1273 | // sp[1] : x |
| 1274 | // result : cc register |
| 1275 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1276 | // Strict only makes sense for equality comparisons. |
| 1277 | ASSERT(!strict || cc == eq); |
| 1278 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1279 | Register lhs; |
| 1280 | Register rhs; |
| 1281 | |
| 1282 | // We load the top two stack positions into registers chosen by the virtual |
| 1283 | // frame. This should keep the register shuffling to a minimum. |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1284 | // Implement '>' and '<=' by reversal to obtain ECMA-262 conversion order. |
| 1285 | if (cc == gt || cc == le) { |
| 1286 | cc = ReverseCondition(cc); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1287 | lhs = frame_->PopToRegister(); |
| 1288 | rhs = frame_->PopToRegister(lhs); // Don't pop to the same register again! |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1289 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1290 | rhs = frame_->PopToRegister(); |
| 1291 | lhs = frame_->PopToRegister(rhs); // Don't pop to the same register again! |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1292 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1293 | |
| 1294 | ASSERT(rhs.is(r0) || rhs.is(r1)); |
| 1295 | ASSERT(lhs.is(r0) || lhs.is(r1)); |
| 1296 | |
| 1297 | // Now we have the two sides in r0 and r1. We flush any other registers |
| 1298 | // because the stub doesn't know about register allocation. |
| 1299 | frame_->SpillAll(); |
| 1300 | Register scratch = VirtualFrame::scratch0(); |
| 1301 | __ orr(scratch, lhs, Operand(rhs)); |
| 1302 | __ tst(scratch, Operand(kSmiTagMask)); |
| 1303 | JumpTarget smi; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1304 | smi.Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1305 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1306 | // Perform non-smi comparison by stub. |
| 1307 | // CompareStub takes arguments in r0 and r1, returns <0, >0 or 0 in r0. |
| 1308 | // We call with 0 args because there are 0 on the stack. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1309 | if (!rhs.is(r0)) { |
| 1310 | __ Swap(rhs, lhs, ip); |
| 1311 | } |
| 1312 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1313 | CompareStub stub(cc, strict); |
| 1314 | frame_->CallStub(&stub, 0); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 1315 | __ cmp(r0, Operand(0)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1316 | JumpTarget exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1317 | exit.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1318 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1319 | // Do smi comparisons by pointer comparison. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1320 | smi.Bind(); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1321 | __ cmp(lhs, Operand(rhs)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1322 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1323 | exit.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1324 | cc_reg_ = cc; |
| 1325 | } |
| 1326 | |
| 1327 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1328 | // Call the function on the stack with the given arguments. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1329 | void CodeGenerator::CallWithArguments(ZoneList<Expression*>* args, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1330 | CallFunctionFlags flags, |
| 1331 | int position) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1332 | frame_->AssertIsSpilled(); |
| 1333 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1334 | // Push the arguments ("left-to-right") on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1335 | int arg_count = args->length(); |
| 1336 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1337 | Load(args->at(i)); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1338 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1339 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1340 | // Record the position for debugging purposes. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1341 | CodeForSourcePosition(position); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1342 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1343 | // Use the shared code stub to call the function. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1344 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1345 | CallFunctionStub call_function(arg_count, in_loop, flags); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1346 | frame_->CallStub(&call_function, arg_count + 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1347 | |
| 1348 | // Restore context and pop function from the stack. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1349 | __ ldr(cp, frame_->Context()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1350 | frame_->Drop(); // discard the TOS |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1351 | } |
| 1352 | |
| 1353 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1354 | void CodeGenerator::CallApplyLazy(Expression* applicand, |
| 1355 | Expression* receiver, |
| 1356 | VariableProxy* arguments, |
| 1357 | int position) { |
| 1358 | // An optimized implementation of expressions of the form |
| 1359 | // x.apply(y, arguments). |
| 1360 | // If the arguments object of the scope has not been allocated, |
| 1361 | // and x.apply is Function.prototype.apply, this optimization |
| 1362 | // just copies y and the arguments of the current function on the |
| 1363 | // stack, as receiver and arguments, and calls x. |
| 1364 | // In the implementation comments, we call x the applicand |
| 1365 | // and y the receiver. |
| 1366 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 1367 | |
| 1368 | ASSERT(ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION); |
| 1369 | ASSERT(arguments->IsArguments()); |
| 1370 | |
| 1371 | // Load applicand.apply onto the stack. This will usually |
| 1372 | // give us a megamorphic load site. Not super, but it works. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1373 | Load(applicand); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1374 | Handle<String> name = Factory::LookupAsciiSymbol("apply"); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1375 | frame_->Dup(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1376 | frame_->CallLoadIC(name, RelocInfo::CODE_TARGET); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1377 | frame_->EmitPush(r0); |
| 1378 | |
| 1379 | // Load the receiver and the existing arguments object onto the |
| 1380 | // expression stack. Avoid allocating the arguments object here. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1381 | Load(receiver); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1382 | LoadFromSlot(scope()->arguments()->var()->slot(), NOT_INSIDE_TYPEOF); |
| 1383 | |
| 1384 | // Emit the source position information after having loaded the |
| 1385 | // receiver and the arguments. |
| 1386 | CodeForSourcePosition(position); |
| 1387 | // Contents of the stack at this point: |
| 1388 | // sp[0]: arguments object of the current function or the hole. |
| 1389 | // sp[1]: receiver |
| 1390 | // sp[2]: applicand.apply |
| 1391 | // sp[3]: applicand. |
| 1392 | |
| 1393 | // Check if the arguments object has been lazily allocated |
| 1394 | // already. If so, just use that instead of copying the arguments |
| 1395 | // from the stack. This also deals with cases where a local variable |
| 1396 | // named 'arguments' has been introduced. |
| 1397 | __ ldr(r0, MemOperand(sp, 0)); |
| 1398 | |
| 1399 | Label slow, done; |
| 1400 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 1401 | __ cmp(ip, r0); |
| 1402 | __ b(ne, &slow); |
| 1403 | |
| 1404 | Label build_args; |
| 1405 | // Get rid of the arguments object probe. |
| 1406 | frame_->Drop(); |
| 1407 | // Stack now has 3 elements on it. |
| 1408 | // Contents of stack at this point: |
| 1409 | // sp[0]: receiver |
| 1410 | // sp[1]: applicand.apply |
| 1411 | // sp[2]: applicand. |
| 1412 | |
| 1413 | // Check that the receiver really is a JavaScript object. |
| 1414 | __ ldr(r0, MemOperand(sp, 0)); |
| 1415 | __ BranchOnSmi(r0, &build_args); |
| 1416 | // We allow all JSObjects including JSFunctions. As long as |
| 1417 | // JS_FUNCTION_TYPE is the last instance type and it is right |
| 1418 | // after LAST_JS_OBJECT_TYPE, we do not have to check the upper |
| 1419 | // bound. |
| 1420 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 1421 | ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
| 1422 | __ CompareObjectType(r0, r1, r2, FIRST_JS_OBJECT_TYPE); |
| 1423 | __ b(lt, &build_args); |
| 1424 | |
| 1425 | // Check that applicand.apply is Function.prototype.apply. |
| 1426 | __ ldr(r0, MemOperand(sp, kPointerSize)); |
| 1427 | __ BranchOnSmi(r0, &build_args); |
| 1428 | __ CompareObjectType(r0, r1, r2, JS_FUNCTION_TYPE); |
| 1429 | __ b(ne, &build_args); |
| 1430 | __ ldr(r0, FieldMemOperand(r0, JSFunction::kSharedFunctionInfoOffset)); |
| 1431 | Handle<Code> apply_code(Builtins::builtin(Builtins::FunctionApply)); |
| 1432 | __ ldr(r1, FieldMemOperand(r0, SharedFunctionInfo::kCodeOffset)); |
| 1433 | __ cmp(r1, Operand(apply_code)); |
| 1434 | __ b(ne, &build_args); |
| 1435 | |
| 1436 | // Check that applicand is a function. |
| 1437 | __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
| 1438 | __ BranchOnSmi(r1, &build_args); |
| 1439 | __ CompareObjectType(r1, r2, r3, JS_FUNCTION_TYPE); |
| 1440 | __ b(ne, &build_args); |
| 1441 | |
| 1442 | // Copy the arguments to this function possibly from the |
| 1443 | // adaptor frame below it. |
| 1444 | Label invoke, adapted; |
| 1445 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1446 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
| 1447 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1448 | __ b(eq, &adapted); |
| 1449 | |
| 1450 | // No arguments adaptor frame. Copy fixed number of arguments. |
| 1451 | __ mov(r0, Operand(scope()->num_parameters())); |
| 1452 | for (int i = 0; i < scope()->num_parameters(); i++) { |
| 1453 | __ ldr(r2, frame_->ParameterAt(i)); |
| 1454 | __ push(r2); |
| 1455 | } |
| 1456 | __ jmp(&invoke); |
| 1457 | |
| 1458 | // Arguments adaptor frame present. Copy arguments from there, but |
| 1459 | // avoid copying too many arguments to avoid stack overflows. |
| 1460 | __ bind(&adapted); |
| 1461 | static const uint32_t kArgumentsLimit = 1 * KB; |
| 1462 | __ ldr(r0, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1463 | __ mov(r0, Operand(r0, LSR, kSmiTagSize)); |
| 1464 | __ mov(r3, r0); |
| 1465 | __ cmp(r0, Operand(kArgumentsLimit)); |
| 1466 | __ b(gt, &build_args); |
| 1467 | |
| 1468 | // Loop through the arguments pushing them onto the execution |
| 1469 | // stack. We don't inform the virtual frame of the push, so we don't |
| 1470 | // have to worry about getting rid of the elements from the virtual |
| 1471 | // frame. |
| 1472 | Label loop; |
| 1473 | // r3 is a small non-negative integer, due to the test above. |
| 1474 | __ cmp(r3, Operand(0)); |
| 1475 | __ b(eq, &invoke); |
| 1476 | // Compute the address of the first argument. |
| 1477 | __ add(r2, r2, Operand(r3, LSL, kPointerSizeLog2)); |
| 1478 | __ add(r2, r2, Operand(kPointerSize)); |
| 1479 | __ bind(&loop); |
| 1480 | // Post-decrement argument address by kPointerSize on each iteration. |
| 1481 | __ ldr(r4, MemOperand(r2, kPointerSize, NegPostIndex)); |
| 1482 | __ push(r4); |
| 1483 | __ sub(r3, r3, Operand(1), SetCC); |
| 1484 | __ b(gt, &loop); |
| 1485 | |
| 1486 | // Invoke the function. |
| 1487 | __ bind(&invoke); |
| 1488 | ParameterCount actual(r0); |
| 1489 | __ InvokeFunction(r1, actual, CALL_FUNCTION); |
| 1490 | // Drop applicand.apply and applicand from the stack, and push |
| 1491 | // the result of the function call, but leave the spilled frame |
| 1492 | // unchanged, with 3 elements, so it is correct when we compile the |
| 1493 | // slow-case code. |
| 1494 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 1495 | __ push(r0); |
| 1496 | // Stack now has 1 element: |
| 1497 | // sp[0]: result |
| 1498 | __ jmp(&done); |
| 1499 | |
| 1500 | // Slow-case: Allocate the arguments object since we know it isn't |
| 1501 | // there, and fall-through to the slow-case where we call |
| 1502 | // applicand.apply. |
| 1503 | __ bind(&build_args); |
| 1504 | // Stack now has 3 elements, because we have jumped from where: |
| 1505 | // sp[0]: receiver |
| 1506 | // sp[1]: applicand.apply |
| 1507 | // sp[2]: applicand. |
| 1508 | StoreArgumentsObject(false); |
| 1509 | |
| 1510 | // Stack and frame now have 4 elements. |
| 1511 | __ bind(&slow); |
| 1512 | |
| 1513 | // Generic computation of x.apply(y, args) with no special optimization. |
| 1514 | // Flip applicand.apply and applicand on the stack, so |
| 1515 | // applicand looks like the receiver of the applicand.apply call. |
| 1516 | // Then process it as a normal function call. |
| 1517 | __ ldr(r0, MemOperand(sp, 3 * kPointerSize)); |
| 1518 | __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1519 | __ Strd(r0, r1, MemOperand(sp, 2 * kPointerSize)); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1520 | |
| 1521 | CallFunctionStub call_function(2, NOT_IN_LOOP, NO_CALL_FUNCTION_FLAGS); |
| 1522 | frame_->CallStub(&call_function, 3); |
| 1523 | // The function and its two arguments have been dropped. |
| 1524 | frame_->Drop(); // Drop the receiver as well. |
| 1525 | frame_->EmitPush(r0); |
| 1526 | // Stack now has 1 element: |
| 1527 | // sp[0]: result |
| 1528 | __ bind(&done); |
| 1529 | |
| 1530 | // Restore the context register after a call. |
| 1531 | __ ldr(cp, frame_->Context()); |
| 1532 | } |
| 1533 | |
| 1534 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1535 | void CodeGenerator::Branch(bool if_true, JumpTarget* target) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1536 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1537 | ASSERT(has_cc()); |
| 1538 | Condition cc = if_true ? cc_reg_ : NegateCondition(cc_reg_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1539 | target->Branch(cc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1540 | cc_reg_ = al; |
| 1541 | } |
| 1542 | |
| 1543 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1544 | void CodeGenerator::CheckStack() { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1545 | VirtualFrame::SpilledScope spilled_scope(frame_); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1546 | Comment cmnt(masm_, "[ check stack"); |
| 1547 | __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| 1548 | // Put the lr setup instruction in the delay slot. kInstrSize is added to |
| 1549 | // the implicit 8 byte offset that always applies to operations with pc and |
| 1550 | // gives a return address 12 bytes down. |
| 1551 | masm_->add(lr, pc, Operand(Assembler::kInstrSize)); |
| 1552 | masm_->cmp(sp, Operand(ip)); |
| 1553 | StackCheckStub stub; |
| 1554 | // Call the stub if lower. |
| 1555 | masm_->mov(pc, |
| 1556 | Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()), |
| 1557 | RelocInfo::CODE_TARGET), |
| 1558 | LeaveCC, |
| 1559 | lo); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1560 | } |
| 1561 | |
| 1562 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1563 | void CodeGenerator::VisitStatements(ZoneList<Statement*>* statements) { |
| 1564 | #ifdef DEBUG |
| 1565 | int original_height = frame_->height(); |
| 1566 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1567 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1568 | for (int i = 0; frame_ != NULL && i < statements->length(); i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1569 | Visit(statements->at(i)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1570 | } |
| 1571 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
| 1572 | } |
| 1573 | |
| 1574 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1575 | void CodeGenerator::VisitBlock(Block* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1576 | #ifdef DEBUG |
| 1577 | int original_height = frame_->height(); |
| 1578 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1579 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1580 | Comment cmnt(masm_, "[ Block"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1581 | CodeForStatementPosition(node); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1582 | node->break_target()->SetExpectedHeight(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1583 | VisitStatements(node->statements()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1584 | if (node->break_target()->is_linked()) { |
| 1585 | node->break_target()->Bind(); |
| 1586 | } |
| 1587 | node->break_target()->Unuse(); |
| 1588 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1589 | } |
| 1590 | |
| 1591 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1592 | void CodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1593 | frame_->EmitPush(cp); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1594 | frame_->EmitPush(Operand(pairs)); |
| 1595 | frame_->EmitPush(Operand(Smi::FromInt(is_eval() ? 1 : 0))); |
| 1596 | |
| 1597 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1598 | frame_->CallRuntime(Runtime::kDeclareGlobals, 3); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1599 | // The result is discarded. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1600 | } |
| 1601 | |
| 1602 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1603 | void CodeGenerator::VisitDeclaration(Declaration* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1604 | #ifdef DEBUG |
| 1605 | int original_height = frame_->height(); |
| 1606 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1607 | Comment cmnt(masm_, "[ Declaration"); |
| 1608 | Variable* var = node->proxy()->var(); |
| 1609 | ASSERT(var != NULL); // must have been resolved |
| 1610 | Slot* slot = var->slot(); |
| 1611 | |
| 1612 | // If it was not possible to allocate the variable at compile time, |
| 1613 | // we need to "declare" it at runtime to make sure it actually |
| 1614 | // exists in the local context. |
| 1615 | if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 1616 | // Variables with a "LOOKUP" slot were introduced as non-locals |
| 1617 | // during variable resolution and must have mode DYNAMIC. |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 1618 | ASSERT(var->is_dynamic()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1619 | // For now, just do a runtime call. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1620 | frame_->EmitPush(cp); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1621 | frame_->EmitPush(Operand(var->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1622 | // Declaration nodes are always declared in only two modes. |
| 1623 | ASSERT(node->mode() == Variable::VAR || node->mode() == Variable::CONST); |
| 1624 | PropertyAttributes attr = node->mode() == Variable::VAR ? NONE : READ_ONLY; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1625 | frame_->EmitPush(Operand(Smi::FromInt(attr))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1626 | // Push initial value, if any. |
| 1627 | // Note: For variables we must not push an initial value (such as |
| 1628 | // 'undefined') because we may have a (legal) redeclaration and we |
| 1629 | // must not destroy the current value. |
| 1630 | if (node->mode() == Variable::CONST) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1631 | frame_->EmitPushRoot(Heap::kTheHoleValueRootIndex); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1632 | } else if (node->fun() != NULL) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1633 | Load(node->fun()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1634 | } else { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1635 | frame_->EmitPush(Operand(0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1636 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1637 | |
| 1638 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1639 | frame_->CallRuntime(Runtime::kDeclareContextSlot, 4); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1640 | // Ignore the return value (declarations are statements). |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1641 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1642 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1643 | return; |
| 1644 | } |
| 1645 | |
| 1646 | ASSERT(!var->is_global()); |
| 1647 | |
| 1648 | // If we have a function or a constant, we need to initialize the variable. |
| 1649 | Expression* val = NULL; |
| 1650 | if (node->mode() == Variable::CONST) { |
| 1651 | val = new Literal(Factory::the_hole_value()); |
| 1652 | } else { |
| 1653 | val = node->fun(); // NULL if we don't have a function |
| 1654 | } |
| 1655 | |
| 1656 | if (val != NULL) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1657 | // Set initial value. |
| 1658 | Reference target(this, node->proxy()); |
| 1659 | Load(val); |
| 1660 | target.SetValue(NOT_CONST_INIT); |
| 1661 | |
iposva@chromium.org | 245aa85 | 2009-02-10 00:49:54 +0000 | [diff] [blame] | 1662 | // Get rid of the assigned value (declarations are statements). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1663 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1664 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1665 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1666 | } |
| 1667 | |
| 1668 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1669 | void CodeGenerator::VisitExpressionStatement(ExpressionStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1670 | #ifdef DEBUG |
| 1671 | int original_height = frame_->height(); |
| 1672 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1673 | Comment cmnt(masm_, "[ ExpressionStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1674 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1675 | Expression* expression = node->expression(); |
| 1676 | expression->MarkAsStatement(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1677 | Load(expression); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1678 | frame_->Drop(); |
| 1679 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1683 | void CodeGenerator::VisitEmptyStatement(EmptyStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1684 | #ifdef DEBUG |
| 1685 | int original_height = frame_->height(); |
| 1686 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1687 | Comment cmnt(masm_, "// EmptyStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1688 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1689 | // nothing to do |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1690 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1691 | } |
| 1692 | |
| 1693 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1694 | void CodeGenerator::VisitIfStatement(IfStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1695 | #ifdef DEBUG |
| 1696 | int original_height = frame_->height(); |
| 1697 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1698 | Comment cmnt(masm_, "[ IfStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1699 | // Generate different code depending on which parts of the if statement |
| 1700 | // are present or not. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1701 | bool has_then_stm = node->HasThenStatement(); |
| 1702 | bool has_else_stm = node->HasElseStatement(); |
| 1703 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1704 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1705 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1706 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1707 | if (has_then_stm && has_else_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1708 | Comment cmnt(masm_, "[ IfThenElse"); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1709 | JumpTarget then; |
| 1710 | JumpTarget else_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1711 | // if (cond) |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1712 | LoadCondition(node->condition(), &then, &else_, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1713 | if (frame_ != NULL) { |
| 1714 | Branch(false, &else_); |
| 1715 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1716 | // then |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1717 | if (frame_ != NULL || then.is_linked()) { |
| 1718 | then.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1719 | Visit(node->then_statement()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1720 | } |
| 1721 | if (frame_ != NULL) { |
| 1722 | exit.Jump(); |
| 1723 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1724 | // else |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1725 | if (else_.is_linked()) { |
| 1726 | else_.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1727 | Visit(node->else_statement()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1728 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1729 | |
| 1730 | } else if (has_then_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1731 | Comment cmnt(masm_, "[ IfThen"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1732 | ASSERT(!has_else_stm); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1733 | JumpTarget then; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1734 | // if (cond) |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1735 | LoadCondition(node->condition(), &then, &exit, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1736 | if (frame_ != NULL) { |
| 1737 | Branch(false, &exit); |
| 1738 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1739 | // then |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1740 | if (frame_ != NULL || then.is_linked()) { |
| 1741 | then.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1742 | Visit(node->then_statement()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1743 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1744 | |
| 1745 | } else if (has_else_stm) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1746 | Comment cmnt(masm_, "[ IfElse"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1747 | ASSERT(!has_then_stm); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1748 | JumpTarget else_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1749 | // if (!cond) |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1750 | LoadCondition(node->condition(), &exit, &else_, true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1751 | if (frame_ != NULL) { |
| 1752 | Branch(true, &exit); |
| 1753 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1754 | // else |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1755 | if (frame_ != NULL || else_.is_linked()) { |
| 1756 | else_.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1757 | Visit(node->else_statement()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1758 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1759 | |
| 1760 | } else { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1761 | Comment cmnt(masm_, "[ If"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1762 | ASSERT(!has_then_stm && !has_else_stm); |
| 1763 | // if (cond) |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1764 | LoadCondition(node->condition(), &exit, &exit, false); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1765 | if (frame_ != NULL) { |
| 1766 | if (has_cc()) { |
| 1767 | cc_reg_ = al; |
| 1768 | } else { |
| 1769 | frame_->Drop(); |
| 1770 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | // end |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1775 | if (exit.is_linked()) { |
| 1776 | exit.Bind(); |
| 1777 | } |
| 1778 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1779 | } |
| 1780 | |
| 1781 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1782 | void CodeGenerator::VisitContinueStatement(ContinueStatement* node) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1783 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1784 | Comment cmnt(masm_, "[ ContinueStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1785 | CodeForStatementPosition(node); |
| 1786 | node->target()->continue_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1787 | } |
| 1788 | |
| 1789 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1790 | void CodeGenerator::VisitBreakStatement(BreakStatement* node) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1791 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1792 | Comment cmnt(masm_, "[ BreakStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1793 | CodeForStatementPosition(node); |
| 1794 | node->target()->break_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1795 | } |
| 1796 | |
| 1797 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1798 | void CodeGenerator::VisitReturnStatement(ReturnStatement* node) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1799 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1800 | Comment cmnt(masm_, "[ ReturnStatement"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 1801 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1802 | CodeForStatementPosition(node); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1803 | Load(node->expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1804 | if (function_return_is_shadowed_) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1805 | frame_->EmitPop(r0); |
| 1806 | function_return_.Jump(); |
| 1807 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1808 | // Pop the result from the frame and prepare the frame for |
| 1809 | // returning thus making it easier to merge. |
| 1810 | frame_->EmitPop(r0); |
| 1811 | frame_->PrepareForReturn(); |
| 1812 | |
| 1813 | function_return_.Jump(); |
| 1814 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1815 | } |
| 1816 | |
| 1817 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1818 | void CodeGenerator::VisitWithEnterStatement(WithEnterStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1819 | #ifdef DEBUG |
| 1820 | int original_height = frame_->height(); |
| 1821 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1822 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1823 | Comment cmnt(masm_, "[ WithEnterStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1824 | CodeForStatementPosition(node); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1825 | Load(node->expression()); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1826 | if (node->is_catch_block()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1827 | frame_->CallRuntime(Runtime::kPushCatchContext, 1); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1828 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1829 | frame_->CallRuntime(Runtime::kPushContext, 1); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1830 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 1831 | #ifdef DEBUG |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1832 | JumpTarget verified_true; |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 1833 | __ cmp(r0, cp); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 1834 | verified_true.Branch(eq); |
| 1835 | __ stop("PushContext: r0 is expected to be the same as cp"); |
| 1836 | verified_true.Bind(); |
| 1837 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1838 | // Update context local. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1839 | __ str(cp, frame_->Context()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1840 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1841 | } |
| 1842 | |
| 1843 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1844 | void CodeGenerator::VisitWithExitStatement(WithExitStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1845 | #ifdef DEBUG |
| 1846 | int original_height = frame_->height(); |
| 1847 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1848 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1849 | Comment cmnt(masm_, "[ WithExitStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1850 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1851 | // Pop context. |
| 1852 | __ ldr(cp, ContextOperand(cp, Context::PREVIOUS_INDEX)); |
| 1853 | // Update context local. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1854 | __ str(cp, frame_->Context()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1855 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1856 | } |
| 1857 | |
| 1858 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1859 | void CodeGenerator::VisitSwitchStatement(SwitchStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1860 | #ifdef DEBUG |
| 1861 | int original_height = frame_->height(); |
| 1862 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1863 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1864 | Comment cmnt(masm_, "[ SwitchStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1865 | CodeForStatementPosition(node); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1866 | node->break_target()->SetExpectedHeight(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1867 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1868 | Load(node->tag()); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1869 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1870 | JumpTarget next_test; |
| 1871 | JumpTarget fall_through; |
| 1872 | JumpTarget default_entry; |
| 1873 | JumpTarget default_exit(JumpTarget::BIDIRECTIONAL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1874 | ZoneList<CaseClause*>* cases = node->cases(); |
| 1875 | int length = cases->length(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1876 | CaseClause* default_clause = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1877 | |
| 1878 | for (int i = 0; i < length; i++) { |
| 1879 | CaseClause* clause = cases->at(i); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1880 | if (clause->is_default()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1881 | // Remember the default clause and compile it at the end. |
| 1882 | default_clause = clause; |
| 1883 | continue; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1884 | } |
| 1885 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1886 | Comment cmnt(masm_, "[ Case clause"); |
| 1887 | // Compile the test. |
| 1888 | next_test.Bind(); |
| 1889 | next_test.Unuse(); |
| 1890 | // Duplicate TOS. |
| 1891 | __ ldr(r0, frame_->Top()); |
| 1892 | frame_->EmitPush(r0); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1893 | Comparison(eq, NULL, clause->label(), true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1894 | Branch(false, &next_test); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1895 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1896 | // Before entering the body from the test, remove the switch value from |
| 1897 | // the stack. |
| 1898 | frame_->Drop(); |
| 1899 | |
| 1900 | // Label the body so that fall through is enabled. |
| 1901 | if (i > 0 && cases->at(i - 1)->is_default()) { |
| 1902 | default_exit.Bind(); |
| 1903 | } else { |
| 1904 | fall_through.Bind(); |
| 1905 | fall_through.Unuse(); |
| 1906 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1907 | VisitStatements(clause->statements()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1908 | |
| 1909 | // If control flow can fall through from the body, jump to the next body |
| 1910 | // or the end of the statement. |
| 1911 | if (frame_ != NULL) { |
| 1912 | if (i < length - 1 && cases->at(i + 1)->is_default()) { |
| 1913 | default_entry.Jump(); |
| 1914 | } else { |
| 1915 | fall_through.Jump(); |
| 1916 | } |
| 1917 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1918 | } |
| 1919 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1920 | // The final "test" removes the switch value. |
| 1921 | next_test.Bind(); |
| 1922 | frame_->Drop(); |
| 1923 | |
| 1924 | // If there is a default clause, compile it. |
| 1925 | if (default_clause != NULL) { |
| 1926 | Comment cmnt(masm_, "[ Default clause"); |
| 1927 | default_entry.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1928 | VisitStatements(default_clause->statements()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1929 | // If control flow can fall out of the default and there is a case after |
| 1930 | // it, jup to that case's body. |
| 1931 | if (frame_ != NULL && default_exit.is_bound()) { |
| 1932 | default_exit.Jump(); |
| 1933 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1934 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1935 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1936 | if (fall_through.is_linked()) { |
| 1937 | fall_through.Bind(); |
| 1938 | } |
| 1939 | |
| 1940 | if (node->break_target()->is_linked()) { |
| 1941 | node->break_target()->Bind(); |
| 1942 | } |
| 1943 | node->break_target()->Unuse(); |
| 1944 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1945 | } |
| 1946 | |
| 1947 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1948 | void CodeGenerator::VisitDoWhileStatement(DoWhileStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1949 | #ifdef DEBUG |
| 1950 | int original_height = frame_->height(); |
| 1951 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 1952 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1953 | Comment cmnt(masm_, "[ DoWhileStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1954 | CodeForStatementPosition(node); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1955 | node->break_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1956 | JumpTarget body(JumpTarget::BIDIRECTIONAL); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 1957 | IncrementLoopNesting(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1958 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1959 | // Label the top of the loop for the backward CFG edge. If the test |
| 1960 | // is always true we can use the continue target, and if the test is |
| 1961 | // always false there is no need. |
| 1962 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 1963 | switch (info) { |
| 1964 | case ALWAYS_TRUE: |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1965 | node->continue_target()->SetExpectedHeight(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1966 | node->continue_target()->Bind(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1967 | break; |
| 1968 | case ALWAYS_FALSE: |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1969 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1970 | break; |
| 1971 | case DONT_KNOW: |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 1972 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1973 | body.Bind(); |
| 1974 | break; |
| 1975 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1976 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1977 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1978 | Visit(node->body()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1979 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 1980 | // Compile the test. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1981 | switch (info) { |
| 1982 | case ALWAYS_TRUE: |
| 1983 | // If control can fall off the end of the body, jump back to the |
| 1984 | // top. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1985 | if (has_valid_frame()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1986 | node->continue_target()->Jump(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1987 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1988 | break; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1989 | case ALWAYS_FALSE: |
| 1990 | // If we have a continue in the body, we only have to bind its |
| 1991 | // jump target. |
| 1992 | if (node->continue_target()->is_linked()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1993 | node->continue_target()->Bind(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 1994 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1995 | break; |
| 1996 | case DONT_KNOW: |
| 1997 | // We have to compile the test expression if it can be reached by |
| 1998 | // control flow falling out of the body or via continue. |
| 1999 | if (node->continue_target()->is_linked()) { |
| 2000 | node->continue_target()->Bind(); |
| 2001 | } |
| 2002 | if (has_valid_frame()) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2003 | Comment cmnt(masm_, "[ DoWhileCondition"); |
| 2004 | CodeForDoWhileConditionPosition(node); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2005 | LoadCondition(node->cond(), &body, node->break_target(), true); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2006 | if (has_valid_frame()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2007 | // A invalid frame here indicates that control did not |
| 2008 | // fall out of the test expression. |
| 2009 | Branch(true, &body); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2010 | } |
| 2011 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2012 | break; |
| 2013 | } |
| 2014 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2015 | if (node->break_target()->is_linked()) { |
| 2016 | node->break_target()->Bind(); |
| 2017 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2018 | DecrementLoopNesting(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2019 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
| 2020 | } |
| 2021 | |
| 2022 | |
| 2023 | void CodeGenerator::VisitWhileStatement(WhileStatement* node) { |
| 2024 | #ifdef DEBUG |
| 2025 | int original_height = frame_->height(); |
| 2026 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2027 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2028 | Comment cmnt(masm_, "[ WhileStatement"); |
| 2029 | CodeForStatementPosition(node); |
| 2030 | |
| 2031 | // If the test is never true and has no side effects there is no need |
| 2032 | // to compile the test or body. |
| 2033 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 2034 | if (info == ALWAYS_FALSE) return; |
| 2035 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2036 | node->break_target()->SetExpectedHeight(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2037 | IncrementLoopNesting(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2038 | |
| 2039 | // Label the top of the loop with the continue target for the backward |
| 2040 | // CFG edge. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2041 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2042 | node->continue_target()->Bind(); |
| 2043 | |
| 2044 | if (info == DONT_KNOW) { |
| 2045 | JumpTarget body; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2046 | LoadCondition(node->cond(), &body, node->break_target(), true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2047 | if (has_valid_frame()) { |
| 2048 | // A NULL frame indicates that control did not fall out of the |
| 2049 | // test expression. |
| 2050 | Branch(false, node->break_target()); |
| 2051 | } |
| 2052 | if (has_valid_frame() || body.is_linked()) { |
| 2053 | body.Bind(); |
| 2054 | } |
| 2055 | } |
| 2056 | |
| 2057 | if (has_valid_frame()) { |
| 2058 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2059 | Visit(node->body()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2060 | |
| 2061 | // If control flow can fall out of the body, jump back to the top. |
| 2062 | if (has_valid_frame()) { |
| 2063 | node->continue_target()->Jump(); |
| 2064 | } |
| 2065 | } |
| 2066 | if (node->break_target()->is_linked()) { |
| 2067 | node->break_target()->Bind(); |
| 2068 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2069 | DecrementLoopNesting(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2070 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
| 2071 | } |
| 2072 | |
| 2073 | |
| 2074 | void CodeGenerator::VisitForStatement(ForStatement* node) { |
| 2075 | #ifdef DEBUG |
| 2076 | int original_height = frame_->height(); |
| 2077 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2078 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2079 | Comment cmnt(masm_, "[ ForStatement"); |
| 2080 | CodeForStatementPosition(node); |
| 2081 | if (node->init() != NULL) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2082 | Visit(node->init()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2083 | } |
| 2084 | |
| 2085 | // If the test is never true there is no need to compile the test or |
| 2086 | // body. |
| 2087 | ConditionAnalysis info = AnalyzeCondition(node->cond()); |
| 2088 | if (info == ALWAYS_FALSE) return; |
| 2089 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2090 | node->break_target()->SetExpectedHeight(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2091 | IncrementLoopNesting(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2092 | |
| 2093 | // If there is no update statement, label the top of the loop with the |
| 2094 | // continue target, otherwise with the loop target. |
| 2095 | JumpTarget loop(JumpTarget::BIDIRECTIONAL); |
| 2096 | if (node->next() == NULL) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2097 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2098 | node->continue_target()->Bind(); |
| 2099 | } else { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2100 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2101 | loop.Bind(); |
| 2102 | } |
| 2103 | |
| 2104 | // If the test is always true, there is no need to compile it. |
| 2105 | if (info == DONT_KNOW) { |
| 2106 | JumpTarget body; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2107 | LoadCondition(node->cond(), &body, node->break_target(), true); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2108 | if (has_valid_frame()) { |
| 2109 | Branch(false, node->break_target()); |
| 2110 | } |
| 2111 | if (has_valid_frame() || body.is_linked()) { |
| 2112 | body.Bind(); |
| 2113 | } |
| 2114 | } |
| 2115 | |
| 2116 | if (has_valid_frame()) { |
| 2117 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2118 | Visit(node->body()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2119 | |
| 2120 | if (node->next() == NULL) { |
| 2121 | // If there is no update statement and control flow can fall out |
| 2122 | // of the loop, jump directly to the continue label. |
| 2123 | if (has_valid_frame()) { |
| 2124 | node->continue_target()->Jump(); |
| 2125 | } |
| 2126 | } else { |
| 2127 | // If there is an update statement and control flow can reach it |
| 2128 | // via falling out of the body of the loop or continuing, we |
| 2129 | // compile the update statement. |
| 2130 | if (node->continue_target()->is_linked()) { |
| 2131 | node->continue_target()->Bind(); |
| 2132 | } |
| 2133 | if (has_valid_frame()) { |
| 2134 | // Record source position of the statement as this code which is |
| 2135 | // after the code for the body actually belongs to the loop |
| 2136 | // statement and not the body. |
| 2137 | CodeForStatementPosition(node); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2138 | Visit(node->next()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2139 | loop.Jump(); |
| 2140 | } |
| 2141 | } |
| 2142 | } |
| 2143 | if (node->break_target()->is_linked()) { |
| 2144 | node->break_target()->Bind(); |
| 2145 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2146 | DecrementLoopNesting(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2147 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2148 | } |
| 2149 | |
| 2150 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2151 | void CodeGenerator::VisitForInStatement(ForInStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2152 | #ifdef DEBUG |
| 2153 | int original_height = frame_->height(); |
| 2154 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2155 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2156 | Comment cmnt(masm_, "[ ForInStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2157 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2158 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2159 | JumpTarget primitive; |
| 2160 | JumpTarget jsobject; |
| 2161 | JumpTarget fixed_array; |
| 2162 | JumpTarget entry(JumpTarget::BIDIRECTIONAL); |
| 2163 | JumpTarget end_del_check; |
| 2164 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2165 | |
| 2166 | // Get the object to enumerate over (converted to JSObject). |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2167 | Load(node->enumerable()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2168 | |
| 2169 | // Both SpiderMonkey and kjs ignore null and undefined in contrast |
| 2170 | // to the specification. 12.6.4 mandates a call to ToObject. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2171 | frame_->EmitPop(r0); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2172 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 2173 | __ cmp(r0, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2174 | exit.Branch(eq); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2175 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| 2176 | __ cmp(r0, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2177 | exit.Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2178 | |
| 2179 | // Stack layout in body: |
| 2180 | // [iteration counter (Smi)] |
| 2181 | // [length of array] |
| 2182 | // [FixedArray] |
| 2183 | // [Map or 0] |
| 2184 | // [Object] |
| 2185 | |
| 2186 | // Check if enumerable is already a JSObject |
| 2187 | __ tst(r0, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2188 | primitive.Branch(eq); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2189 | __ CompareObjectType(r0, r1, r1, FIRST_JS_OBJECT_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2190 | jsobject.Branch(hs); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2191 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2192 | primitive.Bind(); |
| 2193 | frame_->EmitPush(r0); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2194 | frame_->InvokeBuiltin(Builtins::TO_OBJECT, CALL_JS, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2195 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2196 | jsobject.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2197 | // Get the set of properties (as a FixedArray or Map). |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2198 | // r0: value to be iterated over |
| 2199 | frame_->EmitPush(r0); // Push the object being iterated over. |
| 2200 | |
| 2201 | // Check cache validity in generated code. This is a fast case for |
| 2202 | // the JSObject::IsSimpleEnum cache validity checks. If we cannot |
| 2203 | // guarantee cache validity, call the runtime system to check cache |
| 2204 | // validity or get the property names in a fixed array. |
| 2205 | JumpTarget call_runtime; |
| 2206 | JumpTarget loop(JumpTarget::BIDIRECTIONAL); |
| 2207 | JumpTarget check_prototype; |
| 2208 | JumpTarget use_cache; |
| 2209 | __ mov(r1, Operand(r0)); |
| 2210 | loop.Bind(); |
| 2211 | // Check that there are no elements. |
| 2212 | __ ldr(r2, FieldMemOperand(r1, JSObject::kElementsOffset)); |
| 2213 | __ LoadRoot(r4, Heap::kEmptyFixedArrayRootIndex); |
| 2214 | __ cmp(r2, r4); |
| 2215 | call_runtime.Branch(ne); |
| 2216 | // Check that instance descriptors are not empty so that we can |
| 2217 | // check for an enum cache. Leave the map in r3 for the subsequent |
| 2218 | // prototype load. |
| 2219 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 2220 | __ ldr(r2, FieldMemOperand(r3, Map::kInstanceDescriptorsOffset)); |
| 2221 | __ LoadRoot(ip, Heap::kEmptyDescriptorArrayRootIndex); |
| 2222 | __ cmp(r2, ip); |
| 2223 | call_runtime.Branch(eq); |
| 2224 | // Check that there in an enum cache in the non-empty instance |
| 2225 | // descriptors. This is the case if the next enumeration index |
| 2226 | // field does not contain a smi. |
| 2227 | __ ldr(r2, FieldMemOperand(r2, DescriptorArray::kEnumerationIndexOffset)); |
| 2228 | __ tst(r2, Operand(kSmiTagMask)); |
| 2229 | call_runtime.Branch(eq); |
| 2230 | // For all objects but the receiver, check that the cache is empty. |
| 2231 | // r4: empty fixed array root. |
| 2232 | __ cmp(r1, r0); |
| 2233 | check_prototype.Branch(eq); |
| 2234 | __ ldr(r2, FieldMemOperand(r2, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 2235 | __ cmp(r2, r4); |
| 2236 | call_runtime.Branch(ne); |
| 2237 | check_prototype.Bind(); |
| 2238 | // Load the prototype from the map and loop if non-null. |
| 2239 | __ ldr(r1, FieldMemOperand(r3, Map::kPrototypeOffset)); |
| 2240 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| 2241 | __ cmp(r1, ip); |
| 2242 | loop.Branch(ne); |
| 2243 | // The enum cache is valid. Load the map of the object being |
| 2244 | // iterated over and use the cache for the iteration. |
| 2245 | __ ldr(r0, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 2246 | use_cache.Jump(); |
| 2247 | |
| 2248 | call_runtime.Bind(); |
| 2249 | // Call the runtime to get the property names for the object. |
| 2250 | frame_->EmitPush(r0); // push the object (slot 4) for the runtime call |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2251 | frame_->CallRuntime(Runtime::kGetPropertyNamesFast, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2252 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2253 | // If we got a map from the runtime call, we can do a fast |
| 2254 | // modification check. Otherwise, we got a fixed array, and we have |
| 2255 | // to do a slow check. |
| 2256 | // r0: map or fixed array (result from call to |
| 2257 | // Runtime::kGetPropertyNamesFast) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2258 | __ mov(r2, Operand(r0)); |
| 2259 | __ ldr(r1, FieldMemOperand(r2, HeapObject::kMapOffset)); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2260 | __ LoadRoot(ip, Heap::kMetaMapRootIndex); |
| 2261 | __ cmp(r1, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2262 | fixed_array.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2263 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2264 | use_cache.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2265 | // Get enum cache |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2266 | // r0: map (either the result from a call to |
| 2267 | // Runtime::kGetPropertyNamesFast or has been fetched directly from |
| 2268 | // the object) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2269 | __ mov(r1, Operand(r0)); |
| 2270 | __ ldr(r1, FieldMemOperand(r1, Map::kInstanceDescriptorsOffset)); |
| 2271 | __ ldr(r1, FieldMemOperand(r1, DescriptorArray::kEnumerationIndexOffset)); |
| 2272 | __ ldr(r2, |
| 2273 | FieldMemOperand(r1, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 2274 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2275 | frame_->EmitPush(r0); // map |
| 2276 | frame_->EmitPush(r2); // enum cache bridge cache |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2277 | __ ldr(r0, FieldMemOperand(r2, FixedArray::kLengthOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2278 | frame_->EmitPush(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2279 | __ mov(r0, Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2280 | frame_->EmitPush(r0); |
| 2281 | entry.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2282 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2283 | fixed_array.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2284 | __ mov(r1, Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2285 | frame_->EmitPush(r1); // insert 0 in place of Map |
| 2286 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2287 | |
| 2288 | // Push the length of the array and the initial index onto the stack. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2289 | __ ldr(r0, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2290 | frame_->EmitPush(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2291 | __ mov(r0, Operand(Smi::FromInt(0))); // init index |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2292 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2293 | |
| 2294 | // Condition. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2295 | entry.Bind(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2296 | // sp[0] : index |
| 2297 | // sp[1] : array/enum cache length |
| 2298 | // sp[2] : array or enum cache |
| 2299 | // sp[3] : 0 or map |
| 2300 | // sp[4] : enumerable |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2301 | // Grab the current frame's height for the break and continue |
| 2302 | // targets only after all the state is pushed on the frame. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2303 | node->break_target()->SetExpectedHeight(); |
| 2304 | node->continue_target()->SetExpectedHeight(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2305 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2306 | // Load the current count to r0, load the length to r1. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 2307 | __ Ldrd(r0, r1, frame_->ElementAt(0)); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 2308 | __ cmp(r0, r1); // compare to the array length |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2309 | node->break_target()->Branch(hs); |
| 2310 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2311 | // Get the i'th entry of the array. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2312 | __ ldr(r2, frame_->ElementAt(2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2313 | __ add(r2, r2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 2314 | __ ldr(r3, MemOperand(r2, r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 2315 | |
| 2316 | // Get Map or 0. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2317 | __ ldr(r2, frame_->ElementAt(3)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2318 | // Check if this (still) matches the map of the enumerable. |
| 2319 | // If not, we have to filter the key. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2320 | __ ldr(r1, frame_->ElementAt(4)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2321 | __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 2322 | __ cmp(r1, Operand(r2)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2323 | end_del_check.Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2324 | |
| 2325 | // 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] | 2326 | __ ldr(r0, frame_->ElementAt(4)); // push enumerable |
| 2327 | frame_->EmitPush(r0); |
| 2328 | frame_->EmitPush(r3); // push entry |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2329 | frame_->InvokeBuiltin(Builtins::FILTER_KEY, CALL_JS, 2); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 2330 | __ mov(r3, Operand(r0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2331 | |
| 2332 | // If the property has been removed while iterating, we just skip it. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2333 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| 2334 | __ cmp(r3, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2335 | node->continue_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2336 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2337 | end_del_check.Bind(); |
| 2338 | // Store the entry in the 'each' expression and take another spin in the |
| 2339 | // loop. r3: i'th entry of the enum cache (or string there of) |
| 2340 | frame_->EmitPush(r3); // push entry |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2341 | { Reference each(this, node->each()); |
| 2342 | if (!each.is_illegal()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2343 | if (each.size() > 0) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2344 | __ ldr(r0, frame_->ElementAt(each.size())); |
| 2345 | frame_->EmitPush(r0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2346 | each.SetValue(NOT_CONST_INIT); |
| 2347 | frame_->Drop(2); |
| 2348 | } else { |
| 2349 | // If the reference was to a slot we rely on the convenient property |
| 2350 | // that it doesn't matter whether a value (eg, r3 pushed above) is |
| 2351 | // right on top of or right underneath a zero-sized reference. |
| 2352 | each.SetValue(NOT_CONST_INIT); |
| 2353 | frame_->Drop(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2354 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2355 | } |
| 2356 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2357 | // Body. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2358 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2359 | Visit(node->body()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2360 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2361 | // Next. Reestablish a spilled frame in case we are coming here via |
| 2362 | // a continue in the body. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2363 | node->continue_target()->Bind(); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2364 | frame_->SpillAll(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2365 | frame_->EmitPop(r0); |
| 2366 | __ add(r0, r0, Operand(Smi::FromInt(1))); |
| 2367 | frame_->EmitPush(r0); |
| 2368 | entry.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2369 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 2370 | // Cleanup. No need to spill because VirtualFrame::Drop is safe for |
| 2371 | // any frame. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2372 | node->break_target()->Bind(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 2373 | frame_->Drop(5); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2374 | |
| 2375 | // Exit. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2376 | exit.Bind(); |
| 2377 | node->continue_target()->Unuse(); |
| 2378 | node->break_target()->Unuse(); |
| 2379 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2380 | } |
| 2381 | |
| 2382 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2383 | void CodeGenerator::VisitTryCatchStatement(TryCatchStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2384 | #ifdef DEBUG |
| 2385 | int original_height = frame_->height(); |
| 2386 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2387 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2388 | Comment cmnt(masm_, "[ TryCatchStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2389 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2390 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2391 | JumpTarget try_block; |
| 2392 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2393 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2394 | try_block.Call(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2395 | // --- Catch block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2396 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2397 | |
| 2398 | // Store the caught exception in the catch variable. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2399 | Variable* catch_var = node->catch_var()->var(); |
| 2400 | ASSERT(catch_var != NULL && catch_var->slot() != NULL); |
| 2401 | StoreToSlot(catch_var->slot(), NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2402 | |
| 2403 | // Remove the exception from the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2404 | frame_->Drop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2405 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2406 | VisitStatements(node->catch_block()->statements()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2407 | if (frame_ != NULL) { |
| 2408 | exit.Jump(); |
| 2409 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2410 | |
| 2411 | |
| 2412 | // --- Try block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2413 | try_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2414 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2415 | frame_->PushTryHandler(TRY_CATCH_HANDLER); |
| 2416 | int handler_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2417 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2418 | // Shadow the labels for all escapes from the try block, including |
| 2419 | // returns. During shadowing, the original label is hidden as the |
| 2420 | // LabelShadow and operations on the original actually affect the |
| 2421 | // shadowing label. |
| 2422 | // |
| 2423 | // We should probably try to unify the escaping labels and the return |
| 2424 | // label. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2425 | int nof_escapes = node->escaping_targets()->length(); |
| 2426 | List<ShadowTarget*> shadows(1 + nof_escapes); |
| 2427 | |
| 2428 | // Add the shadow target for the function return. |
| 2429 | static const int kReturnShadowIndex = 0; |
| 2430 | shadows.Add(new ShadowTarget(&function_return_)); |
| 2431 | bool function_return_was_shadowed = function_return_is_shadowed_; |
| 2432 | function_return_is_shadowed_ = true; |
| 2433 | ASSERT(shadows[kReturnShadowIndex]->other_target() == &function_return_); |
| 2434 | |
| 2435 | // Add the remaining shadow targets. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2436 | for (int i = 0; i < nof_escapes; i++) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2437 | shadows.Add(new ShadowTarget(node->escaping_targets()->at(i))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2438 | } |
| 2439 | |
| 2440 | // Generate code for the statements in the try block. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2441 | VisitStatements(node->try_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2442 | |
| 2443 | // Stop the introduced shadowing and count the number of required unlinks. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2444 | // After shadowing stops, the original labels are unshadowed and the |
| 2445 | // LabelShadows represent the formerly shadowing labels. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2446 | bool has_unlinks = false; |
| 2447 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2448 | shadows[i]->StopShadowing(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2449 | has_unlinks = has_unlinks || shadows[i]->is_linked(); |
| 2450 | } |
| 2451 | function_return_is_shadowed_ = function_return_was_shadowed; |
| 2452 | |
| 2453 | // Get an external reference to the handler address. |
| 2454 | ExternalReference handler_address(Top::k_handler_address); |
| 2455 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2456 | // If we can fall off the end of the try block, unlink from try chain. |
| 2457 | if (has_valid_frame()) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2458 | // The next handler address is on top of the frame. Unlink from |
| 2459 | // the handler list and drop the rest of this handler from the |
| 2460 | // frame. |
| 2461 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2462 | frame_->EmitPop(r1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2463 | __ mov(r3, Operand(handler_address)); |
| 2464 | __ str(r1, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2465 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2466 | if (has_unlinks) { |
| 2467 | exit.Jump(); |
| 2468 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2469 | } |
| 2470 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2471 | // Generate unlink code for the (formerly) shadowing labels that have been |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2472 | // jumped to. Deallocate each shadow target. |
| 2473 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2474 | if (shadows[i]->is_linked()) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2475 | // Unlink from try chain; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2476 | shadows[i]->Bind(); |
| 2477 | // Because we can be jumping here (to spilled code) from unspilled |
| 2478 | // code, we need to reestablish a spilled frame at this block. |
| 2479 | frame_->SpillAll(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2480 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2481 | // Reload sp from the top handler, because some statements that we |
| 2482 | // break from (eg, for...in) may have left stuff on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2483 | __ mov(r3, Operand(handler_address)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2484 | __ ldr(sp, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2485 | frame_->Forget(frame_->height() - handler_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2486 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2487 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2488 | frame_->EmitPop(r1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2489 | __ str(r1, MemOperand(r3)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 2490 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2491 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2492 | if (!function_return_is_shadowed_ && i == kReturnShadowIndex) { |
| 2493 | frame_->PrepareForReturn(); |
| 2494 | } |
| 2495 | shadows[i]->other_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2496 | } |
| 2497 | } |
| 2498 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2499 | exit.Bind(); |
| 2500 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2501 | } |
| 2502 | |
| 2503 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2504 | void CodeGenerator::VisitTryFinallyStatement(TryFinallyStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2505 | #ifdef DEBUG |
| 2506 | int original_height = frame_->height(); |
| 2507 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2508 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2509 | Comment cmnt(masm_, "[ TryFinallyStatement"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2510 | CodeForStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2511 | |
| 2512 | // State: Used to keep track of reason for entering the finally |
| 2513 | // block. Should probably be extended to hold information for |
| 2514 | // break/continue from within the try block. |
| 2515 | enum { FALLING, THROWING, JUMPING }; |
| 2516 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2517 | JumpTarget try_block; |
| 2518 | JumpTarget finally_block; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2519 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2520 | try_block.Call(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2521 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2522 | frame_->EmitPush(r0); // save exception object on the stack |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2523 | // In case of thrown exceptions, this is where we continue. |
| 2524 | __ mov(r2, Operand(Smi::FromInt(THROWING))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2525 | finally_block.Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2526 | |
| 2527 | // --- Try block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2528 | try_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2529 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2530 | frame_->PushTryHandler(TRY_FINALLY_HANDLER); |
| 2531 | int handler_height = frame_->height(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2532 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2533 | // Shadow the labels for all escapes from the try block, including |
| 2534 | // returns. Shadowing hides the original label as the LabelShadow and |
| 2535 | // operations on the original actually affect the shadowing label. |
| 2536 | // |
| 2537 | // We should probably try to unify the escaping labels and the return |
| 2538 | // label. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2539 | int nof_escapes = node->escaping_targets()->length(); |
| 2540 | List<ShadowTarget*> shadows(1 + nof_escapes); |
| 2541 | |
| 2542 | // Add the shadow target for the function return. |
| 2543 | static const int kReturnShadowIndex = 0; |
| 2544 | shadows.Add(new ShadowTarget(&function_return_)); |
| 2545 | bool function_return_was_shadowed = function_return_is_shadowed_; |
| 2546 | function_return_is_shadowed_ = true; |
| 2547 | ASSERT(shadows[kReturnShadowIndex]->other_target() == &function_return_); |
| 2548 | |
| 2549 | // Add the remaining shadow targets. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2550 | for (int i = 0; i < nof_escapes; i++) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2551 | shadows.Add(new ShadowTarget(node->escaping_targets()->at(i))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2552 | } |
| 2553 | |
| 2554 | // Generate code for the statements in the try block. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2555 | VisitStatements(node->try_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2556 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2557 | // Stop the introduced shadowing and count the number of required unlinks. |
| 2558 | // After shadowing stops, the original labels are unshadowed and the |
| 2559 | // LabelShadows represent the formerly shadowing labels. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2560 | int nof_unlinks = 0; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2561 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2562 | shadows[i]->StopShadowing(); |
| 2563 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 2564 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2565 | function_return_is_shadowed_ = function_return_was_shadowed; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2566 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2567 | // Get an external reference to the handler address. |
| 2568 | ExternalReference handler_address(Top::k_handler_address); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2569 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2570 | // If we can fall off the end of the try block, unlink from the try |
| 2571 | // chain and set the state on the frame to FALLING. |
| 2572 | if (has_valid_frame()) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2573 | // The next handler address is on top of the frame. |
| 2574 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2575 | frame_->EmitPop(r1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2576 | __ mov(r3, Operand(handler_address)); |
| 2577 | __ str(r1, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2578 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2579 | |
| 2580 | // Fake a top of stack value (unneeded when FALLING) and set the |
| 2581 | // state in r2, then jump around the unlink blocks if any. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2582 | __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2583 | frame_->EmitPush(r0); |
| 2584 | __ mov(r2, Operand(Smi::FromInt(FALLING))); |
| 2585 | if (nof_unlinks > 0) { |
| 2586 | finally_block.Jump(); |
| 2587 | } |
| 2588 | } |
| 2589 | |
| 2590 | // Generate code to unlink and set the state for the (formerly) |
| 2591 | // shadowing targets that have been jumped to. |
| 2592 | for (int i = 0; i < shadows.length(); i++) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2593 | if (shadows[i]->is_linked()) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2594 | // If we have come from the shadowed return, the return value is |
| 2595 | // in (a non-refcounted reference to) r0. We must preserve it |
| 2596 | // until it is pushed. |
| 2597 | // |
| 2598 | // Because we can be jumping here (to spilled code) from |
| 2599 | // unspilled code, we need to reestablish a spilled frame at |
| 2600 | // this block. |
| 2601 | shadows[i]->Bind(); |
| 2602 | frame_->SpillAll(); |
| 2603 | |
| 2604 | // Reload sp from the top handler, because some statements that |
| 2605 | // we break from (eg, for...in) may have left stuff on the |
| 2606 | // stack. |
| 2607 | __ mov(r3, Operand(handler_address)); |
| 2608 | __ ldr(sp, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2609 | frame_->Forget(frame_->height() - handler_height); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2610 | |
| 2611 | // Unlink this handler and drop it from the frame. The next |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2612 | // handler address is currently on top of the frame. |
| 2613 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2614 | frame_->EmitPop(r1); |
| 2615 | __ str(r1, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2616 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2617 | |
| 2618 | if (i == kReturnShadowIndex) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2619 | // If this label shadowed the function return, materialize the |
| 2620 | // return value on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2621 | frame_->EmitPush(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 2622 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2623 | // Fake TOS for targets that shadowed breaks and continues. |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2624 | __ LoadRoot(r0, Heap::kUndefinedValueRootIndex); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2625 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2626 | } |
| 2627 | __ mov(r2, Operand(Smi::FromInt(JUMPING + i))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2628 | if (--nof_unlinks > 0) { |
| 2629 | // If this is not the last unlink block, jump around the next. |
| 2630 | finally_block.Jump(); |
| 2631 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2632 | } |
| 2633 | } |
| 2634 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2635 | // --- Finally block --- |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2636 | finally_block.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2637 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2638 | // Push the state on the stack. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2639 | frame_->EmitPush(r2); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2640 | |
| 2641 | // We keep two elements on the stack - the (possibly faked) result |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2642 | // and the state - while evaluating the finally block. |
| 2643 | // |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2644 | // Generate code for the statements in the finally block. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2645 | VisitStatements(node->finally_block()->statements()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2646 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2647 | if (has_valid_frame()) { |
| 2648 | // Restore state and return value or faked TOS. |
| 2649 | frame_->EmitPop(r2); |
| 2650 | frame_->EmitPop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2651 | } |
| 2652 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2653 | // Generate code to jump to the right destination for all used |
| 2654 | // formerly shadowing targets. Deallocate each shadow target. |
| 2655 | for (int i = 0; i < shadows.length(); i++) { |
| 2656 | if (has_valid_frame() && shadows[i]->is_bound()) { |
| 2657 | JumpTarget* original = shadows[i]->other_target(); |
| 2658 | __ cmp(r2, Operand(Smi::FromInt(JUMPING + i))); |
| 2659 | if (!function_return_is_shadowed_ && i == kReturnShadowIndex) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2660 | JumpTarget skip; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2661 | skip.Branch(ne); |
| 2662 | frame_->PrepareForReturn(); |
| 2663 | original->Jump(); |
| 2664 | skip.Bind(); |
| 2665 | } else { |
| 2666 | original->Branch(eq); |
| 2667 | } |
| 2668 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2669 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2670 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2671 | if (has_valid_frame()) { |
| 2672 | // Check if we need to rethrow the exception. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2673 | JumpTarget exit; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2674 | __ cmp(r2, Operand(Smi::FromInt(THROWING))); |
| 2675 | exit.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2676 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2677 | // Rethrow exception. |
| 2678 | frame_->EmitPush(r0); |
| 2679 | frame_->CallRuntime(Runtime::kReThrow, 1); |
| 2680 | |
| 2681 | // Done. |
| 2682 | exit.Bind(); |
| 2683 | } |
| 2684 | ASSERT(!has_valid_frame() || frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2685 | } |
| 2686 | |
| 2687 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2688 | void CodeGenerator::VisitDebuggerStatement(DebuggerStatement* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2689 | #ifdef DEBUG |
| 2690 | int original_height = frame_->height(); |
| 2691 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2692 | Comment cmnt(masm_, "[ DebuggerStatament"); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2693 | CodeForStatementPosition(node); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2694 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2695 | frame_->DebugBreak(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 2696 | #endif |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2697 | // Ignore the return value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2698 | ASSERT(frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2699 | } |
| 2700 | |
| 2701 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2702 | void CodeGenerator::InstantiateFunction( |
| 2703 | Handle<SharedFunctionInfo> function_info) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2704 | // Use the fast case closure allocation code that allocates in new |
| 2705 | // space for nested functions that don't need literals cloning. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2706 | if (scope()->is_function_scope() && function_info->num_literals() == 0) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2707 | FastNewClosureStub stub; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2708 | frame_->EmitPush(Operand(function_info)); |
| 2709 | frame_->SpillAll(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2710 | frame_->CallStub(&stub, 1); |
| 2711 | frame_->EmitPush(r0); |
| 2712 | } else { |
| 2713 | // Create a new closure. |
| 2714 | frame_->EmitPush(cp); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2715 | frame_->EmitPush(Operand(function_info)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2716 | frame_->CallRuntime(Runtime::kNewClosure, 2); |
| 2717 | frame_->EmitPush(r0); |
| 2718 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2719 | } |
| 2720 | |
| 2721 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2722 | void CodeGenerator::VisitFunctionLiteral(FunctionLiteral* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2723 | #ifdef DEBUG |
| 2724 | int original_height = frame_->height(); |
| 2725 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2726 | Comment cmnt(masm_, "[ FunctionLiteral"); |
| 2727 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2728 | // Build the function info and instantiate it. |
| 2729 | Handle<SharedFunctionInfo> function_info = |
| 2730 | Compiler::BuildFunctionInfo(node, script(), this); |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 2731 | // Check for stack-overflow exception. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2732 | if (HasStackOverflow()) { |
| 2733 | ASSERT(frame_->height() == original_height); |
| 2734 | return; |
| 2735 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2736 | InstantiateFunction(function_info); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2737 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2738 | } |
| 2739 | |
| 2740 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2741 | void CodeGenerator::VisitSharedFunctionInfoLiteral( |
| 2742 | SharedFunctionInfoLiteral* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2743 | #ifdef DEBUG |
| 2744 | int original_height = frame_->height(); |
| 2745 | #endif |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2746 | Comment cmnt(masm_, "[ SharedFunctionInfoLiteral"); |
| 2747 | InstantiateFunction(node->shared_function_info()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2748 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2749 | } |
| 2750 | |
| 2751 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2752 | void CodeGenerator::VisitConditional(Conditional* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2753 | #ifdef DEBUG |
| 2754 | int original_height = frame_->height(); |
| 2755 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2756 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2757 | Comment cmnt(masm_, "[ Conditional"); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2758 | JumpTarget then; |
| 2759 | JumpTarget else_; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2760 | LoadCondition(node->condition(), &then, &else_, true); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2761 | if (has_valid_frame()) { |
| 2762 | Branch(false, &else_); |
| 2763 | } |
| 2764 | if (has_valid_frame() || then.is_linked()) { |
| 2765 | then.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2766 | Load(node->then_expression()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2767 | } |
| 2768 | if (else_.is_linked()) { |
| 2769 | JumpTarget exit; |
| 2770 | if (has_valid_frame()) exit.Jump(); |
| 2771 | else_.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2772 | Load(node->else_expression()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2773 | if (exit.is_linked()) exit.Bind(); |
| 2774 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2775 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2776 | } |
| 2777 | |
| 2778 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2779 | void CodeGenerator::LoadFromSlot(Slot* slot, TypeofState typeof_state) { |
| 2780 | if (slot->type() == Slot::LOOKUP) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2781 | ASSERT(slot->var()->is_dynamic()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2782 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 2783 | // JumpTargets do not yet support merging frames so the frame must be |
| 2784 | // spilled when jumping to these targets. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2785 | JumpTarget slow; |
| 2786 | JumpTarget done; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2787 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 2788 | // Generate fast case for loading from slots that correspond to |
| 2789 | // local/global variables or arguments unless they are shadowed by |
| 2790 | // eval-introduced bindings. |
| 2791 | EmitDynamicLoadFromSlotFastCase(slot, |
| 2792 | typeof_state, |
| 2793 | &slow, |
| 2794 | &done); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2795 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2796 | slow.Bind(); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 2797 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2798 | frame_->EmitPush(cp); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2799 | __ mov(r0, Operand(slot->var()->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2800 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2801 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2802 | if (typeof_state == INSIDE_TYPEOF) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2803 | frame_->CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2804 | } else { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2805 | frame_->CallRuntime(Runtime::kLoadContextSlot, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2806 | } |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2807 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2808 | done.Bind(); |
| 2809 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2810 | |
| 2811 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2812 | Register scratch = VirtualFrame::scratch0(); |
| 2813 | frame_->EmitPush(SlotOperand(slot, scratch)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2814 | if (slot->var()->mode() == Variable::CONST) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2815 | // Const slots may contain 'the hole' value (the constant hasn't been |
| 2816 | // initialized yet) which needs to be converted into the 'undefined' |
| 2817 | // value. |
| 2818 | Comment cmnt(masm_, "[ Unhole const"); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2819 | frame_->EmitPop(scratch); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2820 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2821 | __ cmp(scratch, ip); |
| 2822 | __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex, eq); |
| 2823 | frame_->EmitPush(scratch); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2824 | } |
| 2825 | } |
| 2826 | } |
| 2827 | |
| 2828 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 2829 | void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot, |
| 2830 | TypeofState state) { |
| 2831 | LoadFromSlot(slot, state); |
| 2832 | |
| 2833 | // Bail out quickly if we're not using lazy arguments allocation. |
| 2834 | if (ArgumentsMode() != LAZY_ARGUMENTS_ALLOCATION) return; |
| 2835 | |
| 2836 | // ... or if the slot isn't a non-parameter arguments slot. |
| 2837 | if (slot->type() == Slot::PARAMETER || !slot->is_arguments()) return; |
| 2838 | |
| 2839 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 2840 | |
| 2841 | // Load the loaded value from the stack into r0 but leave it on the |
| 2842 | // stack. |
| 2843 | __ ldr(r0, MemOperand(sp, 0)); |
| 2844 | |
| 2845 | // If the loaded value is the sentinel that indicates that we |
| 2846 | // haven't loaded the arguments object yet, we need to do it now. |
| 2847 | JumpTarget exit; |
| 2848 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 2849 | __ cmp(r0, ip); |
| 2850 | exit.Branch(ne); |
| 2851 | frame_->Drop(); |
| 2852 | StoreArgumentsObject(false); |
| 2853 | exit.Bind(); |
| 2854 | } |
| 2855 | |
| 2856 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2857 | void CodeGenerator::StoreToSlot(Slot* slot, InitState init_state) { |
| 2858 | ASSERT(slot != NULL); |
| 2859 | if (slot->type() == Slot::LOOKUP) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2860 | VirtualFrame::SpilledScope spilled_scope(frame_); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2861 | ASSERT(slot->var()->is_dynamic()); |
| 2862 | |
| 2863 | // For now, just do a runtime call. |
| 2864 | frame_->EmitPush(cp); |
| 2865 | __ mov(r0, Operand(slot->var()->name())); |
| 2866 | frame_->EmitPush(r0); |
| 2867 | |
| 2868 | if (init_state == CONST_INIT) { |
| 2869 | // Same as the case for a normal store, but ignores attribute |
| 2870 | // (e.g. READ_ONLY) of context slot so that we can initialize |
| 2871 | // const properties (introduced via eval("const foo = (some |
| 2872 | // expr);")). Also, uses the current function context instead of |
| 2873 | // the top context. |
| 2874 | // |
| 2875 | // Note that we must declare the foo upon entry of eval(), via a |
| 2876 | // context slot declaration, but we cannot initialize it at the |
| 2877 | // same time, because the const declaration may be at the end of |
| 2878 | // the eval code (sigh...) and the const variable may have been |
| 2879 | // used before (where its value is 'undefined'). Thus, we can only |
| 2880 | // do the initialization when we actually encounter the expression |
| 2881 | // and when the expression operands are defined and valid, and |
| 2882 | // thus we need the split into 2 operations: declaration of the |
| 2883 | // context slot followed by initialization. |
| 2884 | frame_->CallRuntime(Runtime::kInitializeConstContextSlot, 3); |
| 2885 | } else { |
| 2886 | frame_->CallRuntime(Runtime::kStoreContextSlot, 3); |
| 2887 | } |
| 2888 | // Storing a variable must keep the (new) value on the expression |
| 2889 | // stack. This is necessary for compiling assignment expressions. |
| 2890 | frame_->EmitPush(r0); |
| 2891 | |
| 2892 | } else { |
| 2893 | ASSERT(!slot->var()->is_dynamic()); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2894 | Register scratch = VirtualFrame::scratch0(); |
| 2895 | VirtualFrame::RegisterAllocationScope scope(this); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2896 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2897 | // The frame must be spilled when branching to this target. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2898 | JumpTarget exit; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2899 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2900 | if (init_state == CONST_INIT) { |
| 2901 | ASSERT(slot->var()->mode() == Variable::CONST); |
| 2902 | // Only the first const initialization must be executed (the slot |
| 2903 | // still contains 'the hole' value). When the assignment is |
| 2904 | // executed, the code is identical to a normal store (see below). |
| 2905 | Comment cmnt(masm_, "[ Init const"); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2906 | __ ldr(scratch, SlotOperand(slot, scratch)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2907 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2908 | __ cmp(scratch, ip); |
| 2909 | frame_->SpillAll(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2910 | exit.Branch(ne); |
| 2911 | } |
| 2912 | |
| 2913 | // We must execute the store. Storing a variable must keep the |
| 2914 | // (new) value on the stack. This is necessary for compiling |
| 2915 | // assignment expressions. |
| 2916 | // |
| 2917 | // Note: We will reach here even with slot->var()->mode() == |
| 2918 | // Variable::CONST because of const declarations which will |
| 2919 | // initialize consts to 'the hole' value and by doing so, end up |
| 2920 | // calling this code. r2 may be loaded with context; used below in |
| 2921 | // RecordWrite. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2922 | Register tos = frame_->Peek(); |
| 2923 | __ str(tos, SlotOperand(slot, scratch)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2924 | if (slot->type() == Slot::CONTEXT) { |
| 2925 | // Skip write barrier if the written value is a smi. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2926 | __ tst(tos, Operand(kSmiTagMask)); |
| 2927 | // We don't use tos any more after here. |
| 2928 | VirtualFrame::SpilledScope spilled_scope(frame_); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2929 | exit.Branch(eq); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2930 | // scratch is loaded with context when calling SlotOperand above. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2931 | int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 2932 | __ mov(r3, Operand(offset)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2933 | // r1 could be identical with tos, but that doesn't matter. |
| 2934 | __ RecordWrite(scratch, r3, r1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2935 | } |
| 2936 | // If we definitely did not jump over the assignment, we do not need |
| 2937 | // to bind the exit label. Doing so can defeat peephole |
| 2938 | // optimization. |
| 2939 | if (init_state == CONST_INIT || slot->type() == Slot::CONTEXT) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2940 | frame_->SpillAll(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 2941 | exit.Bind(); |
| 2942 | } |
| 2943 | } |
| 2944 | } |
| 2945 | |
| 2946 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2947 | void CodeGenerator::LoadFromGlobalSlotCheckExtensions(Slot* slot, |
| 2948 | TypeofState typeof_state, |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2949 | JumpTarget* slow) { |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2950 | // Check that no extension objects have been created by calls to |
| 2951 | // eval from the current scope to the global scope. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 2952 | Register tmp = frame_->scratch0(); |
| 2953 | Register tmp2 = frame_->scratch1(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2954 | Register context = cp; |
| 2955 | Scope* s = scope(); |
| 2956 | while (s != NULL) { |
| 2957 | if (s->num_heap_slots() > 0) { |
| 2958 | if (s->calls_eval()) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 2959 | frame_->SpillAll(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2960 | // Check that extension is NULL. |
| 2961 | __ ldr(tmp2, ContextOperand(context, Context::EXTENSION_INDEX)); |
| 2962 | __ tst(tmp2, tmp2); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2963 | slow->Branch(ne); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2964 | } |
| 2965 | // Load next context in chain. |
| 2966 | __ ldr(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 2967 | __ ldr(tmp, FieldMemOperand(tmp, JSFunction::kContextOffset)); |
| 2968 | context = tmp; |
| 2969 | } |
| 2970 | // If no outer scope calls eval, we do not need to check more |
| 2971 | // context extensions. |
| 2972 | if (!s->outer_scope_calls_eval() || s->is_eval_scope()) break; |
| 2973 | s = s->outer_scope(); |
| 2974 | } |
| 2975 | |
| 2976 | if (s->is_eval_scope()) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 2977 | frame_->SpillAll(); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2978 | Label next, fast; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 2979 | __ Move(tmp, context); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2980 | __ bind(&next); |
| 2981 | // Terminate at global context. |
| 2982 | __ ldr(tmp2, FieldMemOperand(tmp, HeapObject::kMapOffset)); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 2983 | __ LoadRoot(ip, Heap::kGlobalContextMapRootIndex); |
| 2984 | __ cmp(tmp2, ip); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2985 | __ b(eq, &fast); |
| 2986 | // Check that extension is NULL. |
| 2987 | __ ldr(tmp2, ContextOperand(tmp, Context::EXTENSION_INDEX)); |
| 2988 | __ tst(tmp2, tmp2); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 2989 | slow->Branch(ne); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2990 | // Load next context in chain. |
| 2991 | __ ldr(tmp, ContextOperand(tmp, Context::CLOSURE_INDEX)); |
| 2992 | __ ldr(tmp, FieldMemOperand(tmp, JSFunction::kContextOffset)); |
| 2993 | __ b(&next); |
| 2994 | __ bind(&fast); |
| 2995 | } |
| 2996 | |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 2997 | // Load the global object. |
| 2998 | LoadGlobal(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 2999 | // Setup the name register and call load IC. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3000 | frame_->CallLoadIC(slot->var()->name(), |
| 3001 | typeof_state == INSIDE_TYPEOF |
| 3002 | ? RelocInfo::CODE_TARGET |
| 3003 | : RelocInfo::CODE_TARGET_CONTEXT); |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 3004 | } |
| 3005 | |
| 3006 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3007 | void CodeGenerator::EmitDynamicLoadFromSlotFastCase(Slot* slot, |
| 3008 | TypeofState typeof_state, |
| 3009 | JumpTarget* slow, |
| 3010 | JumpTarget* done) { |
| 3011 | // Generate fast-case code for variables that might be shadowed by |
| 3012 | // eval-introduced variables. Eval is used a lot without |
| 3013 | // introducing variables. In those cases, we do not want to |
| 3014 | // perform a runtime call for all variables in the scope |
| 3015 | // containing the eval. |
| 3016 | if (slot->var()->mode() == Variable::DYNAMIC_GLOBAL) { |
| 3017 | LoadFromGlobalSlotCheckExtensions(slot, typeof_state, slow); |
| 3018 | frame_->SpillAll(); |
| 3019 | done->Jump(); |
| 3020 | |
| 3021 | } else if (slot->var()->mode() == Variable::DYNAMIC_LOCAL) { |
| 3022 | frame_->SpillAll(); |
| 3023 | Slot* potential_slot = slot->var()->local_if_not_shadowed()->slot(); |
| 3024 | Expression* rewrite = slot->var()->local_if_not_shadowed()->rewrite(); |
| 3025 | if (potential_slot != NULL) { |
| 3026 | // Generate fast case for locals that rewrite to slots. |
| 3027 | __ ldr(r0, |
| 3028 | ContextSlotOperandCheckExtensions(potential_slot, |
| 3029 | r1, |
| 3030 | r2, |
| 3031 | slow)); |
| 3032 | if (potential_slot->var()->mode() == Variable::CONST) { |
| 3033 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 3034 | __ cmp(r0, ip); |
| 3035 | __ LoadRoot(r0, Heap::kUndefinedValueRootIndex, eq); |
| 3036 | } |
| 3037 | done->Jump(); |
| 3038 | } else if (rewrite != NULL) { |
| 3039 | // Generate fast case for argument loads. |
| 3040 | Property* property = rewrite->AsProperty(); |
| 3041 | if (property != NULL) { |
| 3042 | VariableProxy* obj_proxy = property->obj()->AsVariableProxy(); |
| 3043 | Literal* key_literal = property->key()->AsLiteral(); |
| 3044 | if (obj_proxy != NULL && |
| 3045 | key_literal != NULL && |
| 3046 | obj_proxy->IsArguments() && |
| 3047 | key_literal->handle()->IsSmi()) { |
| 3048 | // Load arguments object if there are no eval-introduced |
| 3049 | // variables. Then load the argument from the arguments |
| 3050 | // object using keyed load. |
| 3051 | __ ldr(r0, |
| 3052 | ContextSlotOperandCheckExtensions(obj_proxy->var()->slot(), |
| 3053 | r1, |
| 3054 | r2, |
| 3055 | slow)); |
| 3056 | frame_->EmitPush(r0); |
| 3057 | __ mov(r1, Operand(key_literal->handle())); |
| 3058 | frame_->EmitPush(r1); |
| 3059 | EmitKeyedLoad(); |
| 3060 | done->Jump(); |
| 3061 | } |
| 3062 | } |
| 3063 | } |
| 3064 | } |
| 3065 | } |
| 3066 | |
| 3067 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3068 | void CodeGenerator::VisitSlot(Slot* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3069 | #ifdef DEBUG |
| 3070 | int original_height = frame_->height(); |
| 3071 | #endif |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3072 | Comment cmnt(masm_, "[ Slot"); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3073 | LoadFromSlotCheckForArguments(node, NOT_INSIDE_TYPEOF); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3074 | ASSERT_EQ(original_height + 1, frame_->height()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3075 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3076 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3077 | |
| 3078 | void CodeGenerator::VisitVariableProxy(VariableProxy* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3079 | #ifdef DEBUG |
| 3080 | int original_height = frame_->height(); |
| 3081 | #endif |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3082 | Comment cmnt(masm_, "[ VariableProxy"); |
| 3083 | |
| 3084 | Variable* var = node->var(); |
| 3085 | Expression* expr = var->rewrite(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3086 | if (expr != NULL) { |
| 3087 | Visit(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3088 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3089 | ASSERT(var->is_global()); |
| 3090 | Reference ref(this, node); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3091 | ref.GetValue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3092 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3093 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3094 | } |
| 3095 | |
| 3096 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3097 | void CodeGenerator::VisitLiteral(Literal* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3098 | #ifdef DEBUG |
| 3099 | int original_height = frame_->height(); |
| 3100 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3101 | Comment cmnt(masm_, "[ Literal"); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3102 | Register reg = frame_->GetTOSRegister(); |
| 3103 | __ mov(reg, Operand(node->handle())); |
| 3104 | frame_->EmitPush(reg); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3105 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3106 | } |
| 3107 | |
| 3108 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3109 | void CodeGenerator::VisitRegExpLiteral(RegExpLiteral* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3110 | #ifdef DEBUG |
| 3111 | int original_height = frame_->height(); |
| 3112 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3113 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3114 | Comment cmnt(masm_, "[ RexExp Literal"); |
| 3115 | |
| 3116 | // Retrieve the literal array and check the allocated entry. |
| 3117 | |
| 3118 | // Load the function of this activation. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3119 | __ ldr(r1, frame_->Function()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3120 | |
| 3121 | // Load the literals array of the function. |
| 3122 | __ ldr(r1, FieldMemOperand(r1, JSFunction::kLiteralsOffset)); |
| 3123 | |
| 3124 | // Load the literal at the ast saved index. |
| 3125 | int literal_offset = |
| 3126 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
| 3127 | __ ldr(r2, FieldMemOperand(r1, literal_offset)); |
| 3128 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3129 | JumpTarget done; |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 3130 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 3131 | __ cmp(r2, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3132 | done.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3133 | |
| 3134 | // If the entry is undefined we call the runtime system to computed |
| 3135 | // the literal. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3136 | frame_->EmitPush(r1); // literal array (0) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3137 | __ mov(r0, Operand(Smi::FromInt(node->literal_index()))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3138 | frame_->EmitPush(r0); // literal index (1) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3139 | __ mov(r0, Operand(node->pattern())); // RegExp pattern (2) |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3140 | frame_->EmitPush(r0); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3141 | __ mov(r0, Operand(node->flags())); // RegExp flags (3) |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3142 | frame_->EmitPush(r0); |
| 3143 | frame_->CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3144 | __ mov(r2, Operand(r0)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3145 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3146 | done.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3147 | // Push the literal. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3148 | frame_->EmitPush(r2); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3149 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3150 | } |
| 3151 | |
| 3152 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3153 | void CodeGenerator::VisitObjectLiteral(ObjectLiteral* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3154 | #ifdef DEBUG |
| 3155 | int original_height = frame_->height(); |
| 3156 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3157 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3158 | Comment cmnt(masm_, "[ ObjectLiteral"); |
| 3159 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3160 | // Load the function of this activation. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3161 | __ ldr(r3, frame_->Function()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3162 | // Literal array. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3163 | __ ldr(r3, FieldMemOperand(r3, JSFunction::kLiteralsOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3164 | // Literal index. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3165 | __ mov(r2, Operand(Smi::FromInt(node->literal_index()))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3166 | // Constant properties. |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3167 | __ mov(r1, Operand(node->constant_properties())); |
| 3168 | // Should the object literal have fast elements? |
| 3169 | __ mov(r0, Operand(Smi::FromInt(node->fast_elements() ? 1 : 0))); |
| 3170 | frame_->EmitPushMultiple(4, r3.bit() | r2.bit() | r1.bit() | r0.bit()); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3171 | if (node->depth() > 1) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3172 | frame_->CallRuntime(Runtime::kCreateObjectLiteral, 4); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3173 | } else { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 3174 | frame_->CallRuntime(Runtime::kCreateObjectLiteralShallow, 4); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3175 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3176 | frame_->EmitPush(r0); // save the result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3177 | for (int i = 0; i < node->properties()->length(); i++) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3178 | // At the start of each iteration, the top of stack contains |
| 3179 | // the newly created object literal. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3180 | ObjectLiteral::Property* property = node->properties()->at(i); |
| 3181 | Literal* key = property->key(); |
| 3182 | Expression* value = property->value(); |
| 3183 | switch (property->kind()) { |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3184 | case ObjectLiteral::Property::CONSTANT: |
| 3185 | break; |
| 3186 | case ObjectLiteral::Property::MATERIALIZED_LITERAL: |
| 3187 | if (CompileTimeValue::IsCompileTimeValue(property->value())) break; |
| 3188 | // else fall through |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3189 | case ObjectLiteral::Property::COMPUTED: |
| 3190 | if (key->handle()->IsSymbol()) { |
| 3191 | Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3192 | Load(value); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3193 | frame_->EmitPop(r0); |
| 3194 | __ mov(r2, Operand(key->handle())); |
| 3195 | __ ldr(r1, frame_->Top()); // Load the receiver. |
| 3196 | frame_->CallCodeObject(ic, RelocInfo::CODE_TARGET, 0); |
| 3197 | break; |
| 3198 | } |
| 3199 | // else fall through |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3200 | case ObjectLiteral::Property::PROTOTYPE: { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3201 | __ ldr(r0, frame_->Top()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3202 | frame_->EmitPush(r0); // dup the result |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3203 | Load(key); |
| 3204 | Load(value); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3205 | frame_->CallRuntime(Runtime::kSetProperty, 3); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3206 | break; |
| 3207 | } |
| 3208 | case ObjectLiteral::Property::SETTER: { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3209 | __ ldr(r0, frame_->Top()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3210 | frame_->EmitPush(r0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3211 | Load(key); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3212 | __ mov(r0, Operand(Smi::FromInt(1))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3213 | frame_->EmitPush(r0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3214 | Load(value); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3215 | frame_->CallRuntime(Runtime::kDefineAccessor, 4); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3216 | break; |
| 3217 | } |
| 3218 | case ObjectLiteral::Property::GETTER: { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3219 | __ ldr(r0, frame_->Top()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3220 | frame_->EmitPush(r0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3221 | Load(key); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3222 | __ mov(r0, Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3223 | frame_->EmitPush(r0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3224 | Load(value); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3225 | frame_->CallRuntime(Runtime::kDefineAccessor, 4); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3226 | break; |
| 3227 | } |
| 3228 | } |
| 3229 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3230 | ASSERT_EQ(original_height + 1, frame_->height()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3231 | } |
| 3232 | |
| 3233 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3234 | void CodeGenerator::VisitArrayLiteral(ArrayLiteral* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3235 | #ifdef DEBUG |
| 3236 | int original_height = frame_->height(); |
| 3237 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3238 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3239 | Comment cmnt(masm_, "[ ArrayLiteral"); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3240 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3241 | // Load the function of this activation. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3242 | __ ldr(r2, frame_->Function()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3243 | // Load the literals array of the function. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3244 | __ ldr(r2, FieldMemOperand(r2, JSFunction::kLiteralsOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3245 | __ mov(r1, Operand(Smi::FromInt(node->literal_index()))); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3246 | __ mov(r0, Operand(node->constant_elements())); |
| 3247 | frame_->EmitPushMultiple(3, r2.bit() | r1.bit() | r0.bit()); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3248 | int length = node->values()->length(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3249 | if (node->depth() > 1) { |
| 3250 | frame_->CallRuntime(Runtime::kCreateArrayLiteral, 3); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3251 | } else if (length > FastCloneShallowArrayStub::kMaximumLength) { |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3252 | frame_->CallRuntime(Runtime::kCreateArrayLiteralShallow, 3); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3253 | } else { |
| 3254 | FastCloneShallowArrayStub stub(length); |
| 3255 | frame_->CallStub(&stub, 3); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3256 | } |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3257 | frame_->EmitPush(r0); // save the result |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3258 | // r0: created object literal |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3259 | |
| 3260 | // Generate code to set the elements in the array that are not |
| 3261 | // literals. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3262 | for (int i = 0; i < node->values()->length(); i++) { |
| 3263 | Expression* value = node->values()->at(i); |
| 3264 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3265 | // If value is a literal the property value is already set in the |
| 3266 | // boilerplate object. |
| 3267 | if (value->AsLiteral() != NULL) continue; |
| 3268 | // If value is a materialized literal the property value is already set |
| 3269 | // in the boilerplate object if it is simple. |
| 3270 | if (CompileTimeValue::IsCompileTimeValue(value)) continue; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3271 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3272 | // The property must be set by generated code. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3273 | Load(value); |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3274 | frame_->EmitPop(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3275 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3276 | // Fetch the object literal. |
| 3277 | __ ldr(r1, frame_->Top()); |
| 3278 | // Get the elements array. |
| 3279 | __ ldr(r1, FieldMemOperand(r1, JSObject::kElementsOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3280 | |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3281 | // Write to the indexed properties array. |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3282 | int offset = i * kPointerSize + FixedArray::kHeaderSize; |
ager@chromium.org | bb29dc9 | 2009-03-24 13:25:23 +0000 | [diff] [blame] | 3283 | __ str(r0, FieldMemOperand(r1, offset)); |
| 3284 | |
| 3285 | // Update the write barrier for the array address. |
| 3286 | __ mov(r3, Operand(offset)); |
| 3287 | __ RecordWrite(r1, r3, r2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3288 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3289 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3290 | } |
| 3291 | |
| 3292 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 3293 | void CodeGenerator::VisitCatchExtensionObject(CatchExtensionObject* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3294 | #ifdef DEBUG |
| 3295 | int original_height = frame_->height(); |
| 3296 | #endif |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 3297 | // Call runtime routine to allocate the catch extension object and |
| 3298 | // assign the exception value to the catch variable. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3299 | Comment cmnt(masm_, "[ CatchExtensionObject"); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3300 | Load(node->key()); |
| 3301 | Load(node->value()); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 3302 | frame_->CallRuntime(Runtime::kCreateCatchExtensionObject, 2); |
| 3303 | frame_->EmitPush(r0); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3304 | ASSERT_EQ(original_height + 1, frame_->height()); |
| 3305 | } |
| 3306 | |
| 3307 | |
| 3308 | void CodeGenerator::EmitSlotAssignment(Assignment* node) { |
| 3309 | #ifdef DEBUG |
| 3310 | int original_height = frame_->height(); |
| 3311 | #endif |
| 3312 | Comment cmnt(masm(), "[ Variable Assignment"); |
| 3313 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 3314 | ASSERT(var != NULL); |
| 3315 | Slot* slot = var->slot(); |
| 3316 | ASSERT(slot != NULL); |
| 3317 | |
| 3318 | // Evaluate the right-hand side. |
| 3319 | if (node->is_compound()) { |
| 3320 | // For a compound assignment the right-hand side is a binary operation |
| 3321 | // between the current property value and the actual right-hand side. |
| 3322 | LoadFromSlotCheckForArguments(slot, NOT_INSIDE_TYPEOF); |
| 3323 | |
| 3324 | // Perform the binary operation. |
| 3325 | Literal* literal = node->value()->AsLiteral(); |
| 3326 | bool overwrite_value = |
| 3327 | (node->value()->AsBinaryOperation() != NULL && |
| 3328 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| 3329 | if (literal != NULL && literal->handle()->IsSmi()) { |
| 3330 | SmiOperation(node->binary_op(), |
| 3331 | literal->handle(), |
| 3332 | false, |
| 3333 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3334 | } else { |
| 3335 | Load(node->value()); |
| 3336 | VirtualFrameBinaryOperation( |
| 3337 | node->binary_op(), overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3338 | } |
| 3339 | } else { |
| 3340 | Load(node->value()); |
| 3341 | } |
| 3342 | |
| 3343 | // Perform the assignment. |
| 3344 | if (var->mode() != Variable::CONST || node->op() == Token::INIT_CONST) { |
| 3345 | CodeForSourcePosition(node->position()); |
| 3346 | StoreToSlot(slot, |
| 3347 | node->op() == Token::INIT_CONST ? CONST_INIT : NOT_CONST_INIT); |
| 3348 | } |
| 3349 | ASSERT_EQ(original_height + 1, frame_->height()); |
| 3350 | } |
| 3351 | |
| 3352 | |
| 3353 | void CodeGenerator::EmitNamedPropertyAssignment(Assignment* node) { |
| 3354 | #ifdef DEBUG |
| 3355 | int original_height = frame_->height(); |
| 3356 | #endif |
| 3357 | Comment cmnt(masm(), "[ Named Property Assignment"); |
| 3358 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 3359 | Property* prop = node->target()->AsProperty(); |
| 3360 | ASSERT(var == NULL || (prop == NULL && var->is_global())); |
| 3361 | |
| 3362 | // Initialize name and evaluate the receiver sub-expression if necessary. If |
| 3363 | // the receiver is trivial it is not placed on the stack at this point, but |
| 3364 | // loaded whenever actually needed. |
| 3365 | Handle<String> name; |
| 3366 | bool is_trivial_receiver = false; |
| 3367 | if (var != NULL) { |
| 3368 | name = var->name(); |
| 3369 | } else { |
| 3370 | Literal* lit = prop->key()->AsLiteral(); |
| 3371 | ASSERT_NOT_NULL(lit); |
| 3372 | name = Handle<String>::cast(lit->handle()); |
| 3373 | // Do not materialize the receiver on the frame if it is trivial. |
| 3374 | is_trivial_receiver = prop->obj()->IsTrivial(); |
| 3375 | if (!is_trivial_receiver) Load(prop->obj()); |
| 3376 | } |
| 3377 | |
| 3378 | // Change to slow case in the beginning of an initialization block to |
| 3379 | // avoid the quadratic behavior of repeatedly adding fast properties. |
| 3380 | if (node->starts_initialization_block()) { |
| 3381 | // Initialization block consists of assignments of the form expr.x = ..., so |
| 3382 | // this will never be an assignment to a variable, so there must be a |
| 3383 | // receiver object. |
| 3384 | ASSERT_EQ(NULL, var); |
| 3385 | if (is_trivial_receiver) { |
| 3386 | Load(prop->obj()); |
| 3387 | } else { |
| 3388 | frame_->Dup(); |
| 3389 | } |
| 3390 | frame_->CallRuntime(Runtime::kToSlowProperties, 1); |
| 3391 | } |
| 3392 | |
| 3393 | // Change to fast case at the end of an initialization block. To prepare for |
| 3394 | // that add an extra copy of the receiver to the frame, so that it can be |
| 3395 | // converted back to fast case after the assignment. |
| 3396 | if (node->ends_initialization_block() && !is_trivial_receiver) { |
| 3397 | frame_->Dup(); |
| 3398 | } |
| 3399 | |
| 3400 | // Stack layout: |
| 3401 | // [tos] : receiver (only materialized if non-trivial) |
| 3402 | // [tos+1] : receiver if at the end of an initialization block |
| 3403 | |
| 3404 | // Evaluate the right-hand side. |
| 3405 | if (node->is_compound()) { |
| 3406 | // For a compound assignment the right-hand side is a binary operation |
| 3407 | // between the current property value and the actual right-hand side. |
| 3408 | if (is_trivial_receiver) { |
| 3409 | Load(prop->obj()); |
| 3410 | } else if (var != NULL) { |
| 3411 | LoadGlobal(); |
| 3412 | } else { |
| 3413 | frame_->Dup(); |
| 3414 | } |
| 3415 | EmitNamedLoad(name, var != NULL); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3416 | |
| 3417 | // Perform the binary operation. |
| 3418 | Literal* literal = node->value()->AsLiteral(); |
| 3419 | bool overwrite_value = |
| 3420 | (node->value()->AsBinaryOperation() != NULL && |
| 3421 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| 3422 | if (literal != NULL && literal->handle()->IsSmi()) { |
| 3423 | SmiOperation(node->binary_op(), |
| 3424 | literal->handle(), |
| 3425 | false, |
| 3426 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3427 | } else { |
| 3428 | Load(node->value()); |
| 3429 | VirtualFrameBinaryOperation( |
| 3430 | node->binary_op(), overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3431 | } |
| 3432 | } else { |
| 3433 | // For non-compound assignment just load the right-hand side. |
| 3434 | Load(node->value()); |
| 3435 | } |
| 3436 | |
| 3437 | // Stack layout: |
| 3438 | // [tos] : value |
| 3439 | // [tos+1] : receiver (only materialized if non-trivial) |
| 3440 | // [tos+2] : receiver if at the end of an initialization block |
| 3441 | |
| 3442 | // Perform the assignment. It is safe to ignore constants here. |
| 3443 | ASSERT(var == NULL || var->mode() != Variable::CONST); |
| 3444 | ASSERT_NE(Token::INIT_CONST, node->op()); |
| 3445 | if (is_trivial_receiver) { |
| 3446 | // Load the receiver and swap with the value. |
| 3447 | Load(prop->obj()); |
| 3448 | Register t0 = frame_->PopToRegister(); |
| 3449 | Register t1 = frame_->PopToRegister(t0); |
| 3450 | frame_->EmitPush(t0); |
| 3451 | frame_->EmitPush(t1); |
| 3452 | } |
| 3453 | CodeForSourcePosition(node->position()); |
| 3454 | bool is_contextual = (var != NULL); |
| 3455 | EmitNamedStore(name, is_contextual); |
| 3456 | frame_->EmitPush(r0); |
| 3457 | |
| 3458 | // Change to fast case at the end of an initialization block. |
| 3459 | if (node->ends_initialization_block()) { |
| 3460 | ASSERT_EQ(NULL, var); |
| 3461 | // The argument to the runtime call is the receiver. |
| 3462 | if (is_trivial_receiver) { |
| 3463 | Load(prop->obj()); |
| 3464 | } else { |
| 3465 | // A copy of the receiver is below the value of the assignment. Swap |
| 3466 | // the receiver and the value of the assignment expression. |
| 3467 | Register t0 = frame_->PopToRegister(); |
| 3468 | Register t1 = frame_->PopToRegister(t0); |
| 3469 | frame_->EmitPush(t0); |
| 3470 | frame_->EmitPush(t1); |
| 3471 | } |
| 3472 | frame_->CallRuntime(Runtime::kToFastProperties, 1); |
| 3473 | } |
| 3474 | |
| 3475 | // Stack layout: |
| 3476 | // [tos] : result |
| 3477 | |
| 3478 | ASSERT_EQ(original_height + 1, frame_->height()); |
| 3479 | } |
| 3480 | |
| 3481 | |
| 3482 | void CodeGenerator::EmitKeyedPropertyAssignment(Assignment* node) { |
| 3483 | #ifdef DEBUG |
| 3484 | int original_height = frame_->height(); |
| 3485 | #endif |
| 3486 | Comment cmnt(masm_, "[ Keyed Property Assignment"); |
| 3487 | Property* prop = node->target()->AsProperty(); |
| 3488 | ASSERT_NOT_NULL(prop); |
| 3489 | |
| 3490 | // Evaluate the receiver subexpression. |
| 3491 | Load(prop->obj()); |
| 3492 | |
| 3493 | // Change to slow case in the beginning of an initialization block to |
| 3494 | // avoid the quadratic behavior of repeatedly adding fast properties. |
| 3495 | if (node->starts_initialization_block()) { |
| 3496 | frame_->Dup(); |
| 3497 | frame_->CallRuntime(Runtime::kToSlowProperties, 1); |
| 3498 | } |
| 3499 | |
| 3500 | // Change to fast case at the end of an initialization block. To prepare for |
| 3501 | // that add an extra copy of the receiver to the frame, so that it can be |
| 3502 | // converted back to fast case after the assignment. |
| 3503 | if (node->ends_initialization_block()) { |
| 3504 | frame_->Dup(); |
| 3505 | } |
| 3506 | |
| 3507 | // Evaluate the key subexpression. |
| 3508 | Load(prop->key()); |
| 3509 | |
| 3510 | // Stack layout: |
| 3511 | // [tos] : key |
| 3512 | // [tos+1] : receiver |
| 3513 | // [tos+2] : receiver if at the end of an initialization block |
| 3514 | |
| 3515 | // Evaluate the right-hand side. |
| 3516 | if (node->is_compound()) { |
| 3517 | // For a compound assignment the right-hand side is a binary operation |
| 3518 | // between the current property value and the actual right-hand side. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3519 | // Duplicate receiver and key for loading the current property value. |
| 3520 | frame_->Dup2(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3521 | EmitKeyedLoad(); |
| 3522 | frame_->EmitPush(r0); |
| 3523 | |
| 3524 | // Perform the binary operation. |
| 3525 | Literal* literal = node->value()->AsLiteral(); |
| 3526 | bool overwrite_value = |
| 3527 | (node->value()->AsBinaryOperation() != NULL && |
| 3528 | node->value()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| 3529 | if (literal != NULL && literal->handle()->IsSmi()) { |
| 3530 | SmiOperation(node->binary_op(), |
| 3531 | literal->handle(), |
| 3532 | false, |
| 3533 | overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3534 | } else { |
| 3535 | Load(node->value()); |
| 3536 | VirtualFrameBinaryOperation( |
| 3537 | node->binary_op(), overwrite_value ? OVERWRITE_RIGHT : NO_OVERWRITE); |
| 3538 | } |
| 3539 | } else { |
| 3540 | // For non-compound assignment just load the right-hand side. |
| 3541 | Load(node->value()); |
| 3542 | } |
| 3543 | |
| 3544 | // Stack layout: |
| 3545 | // [tos] : value |
| 3546 | // [tos+1] : key |
| 3547 | // [tos+2] : receiver |
| 3548 | // [tos+3] : receiver if at the end of an initialization block |
| 3549 | |
| 3550 | // Perform the assignment. It is safe to ignore constants here. |
| 3551 | ASSERT(node->op() != Token::INIT_CONST); |
| 3552 | CodeForSourcePosition(node->position()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3553 | EmitKeyedStore(prop->key()->type()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3554 | frame_->EmitPush(r0); |
| 3555 | |
| 3556 | // Stack layout: |
| 3557 | // [tos] : result |
| 3558 | // [tos+1] : receiver if at the end of an initialization block |
| 3559 | |
| 3560 | // Change to fast case at the end of an initialization block. |
| 3561 | if (node->ends_initialization_block()) { |
| 3562 | // The argument to the runtime call is the extra copy of the receiver, |
| 3563 | // which is below the value of the assignment. Swap the receiver and |
| 3564 | // the value of the assignment expression. |
| 3565 | Register t0 = frame_->PopToRegister(); |
| 3566 | Register t1 = frame_->PopToRegister(t0); |
| 3567 | frame_->EmitPush(t1); |
| 3568 | frame_->EmitPush(t0); |
| 3569 | frame_->CallRuntime(Runtime::kToFastProperties, 1); |
| 3570 | } |
| 3571 | |
| 3572 | // Stack layout: |
| 3573 | // [tos] : result |
| 3574 | |
| 3575 | ASSERT_EQ(original_height + 1, frame_->height()); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 3576 | } |
| 3577 | |
| 3578 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3579 | void CodeGenerator::VisitAssignment(Assignment* node) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3580 | VirtualFrame::RegisterAllocationScope scope(this); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3581 | #ifdef DEBUG |
| 3582 | int original_height = frame_->height(); |
| 3583 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3584 | Comment cmnt(masm_, "[ Assignment"); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3585 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3586 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 3587 | Property* prop = node->target()->AsProperty(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3588 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3589 | if (var != NULL && !var->is_global()) { |
| 3590 | EmitSlotAssignment(node); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3591 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3592 | } else if ((prop != NULL && prop->key()->IsPropertyName()) || |
| 3593 | (var != NULL && var->is_global())) { |
| 3594 | // Properties whose keys are property names and global variables are |
| 3595 | // treated as named property references. We do not need to consider |
| 3596 | // global 'this' because it is not a valid left-hand side. |
| 3597 | EmitNamedPropertyAssignment(node); |
| 3598 | |
| 3599 | } else if (prop != NULL) { |
| 3600 | // Other properties (including rewritten parameters for a function that |
| 3601 | // uses arguments) are keyed property assignments. |
| 3602 | EmitKeyedPropertyAssignment(node); |
| 3603 | |
| 3604 | } else { |
| 3605 | // Invalid left-hand side. |
| 3606 | Load(node->target()); |
| 3607 | frame_->CallRuntime(Runtime::kThrowReferenceError, 1); |
| 3608 | // The runtime call doesn't actually return but the code generator will |
| 3609 | // still generate code and expects a certain frame height. |
| 3610 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3611 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3612 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3613 | } |
| 3614 | |
| 3615 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3616 | void CodeGenerator::VisitThrow(Throw* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3617 | #ifdef DEBUG |
| 3618 | int original_height = frame_->height(); |
| 3619 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3620 | Comment cmnt(masm_, "[ Throw"); |
| 3621 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3622 | Load(node->exception()); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3623 | CodeForSourcePosition(node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3624 | frame_->CallRuntime(Runtime::kThrow, 1); |
| 3625 | frame_->EmitPush(r0); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3626 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3627 | } |
| 3628 | |
| 3629 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3630 | void CodeGenerator::VisitProperty(Property* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3631 | #ifdef DEBUG |
| 3632 | int original_height = frame_->height(); |
| 3633 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3634 | Comment cmnt(masm_, "[ Property"); |
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 | { Reference property(this, node); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3637 | property.GetValue(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3638 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3639 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3640 | } |
| 3641 | |
| 3642 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3643 | void CodeGenerator::VisitCall(Call* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3644 | #ifdef DEBUG |
| 3645 | int original_height = frame_->height(); |
| 3646 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3647 | Comment cmnt(masm_, "[ Call"); |
| 3648 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3649 | Expression* function = node->expression(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3650 | ZoneList<Expression*>* args = node->arguments(); |
| 3651 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3652 | // Standard function call. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3653 | // Check if the function is a variable or a property. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3654 | Variable* var = function->AsVariableProxy()->AsVariable(); |
| 3655 | Property* property = function->AsProperty(); |
| 3656 | |
| 3657 | // ------------------------------------------------------------------------ |
| 3658 | // Fast-case: Use inline caching. |
| 3659 | // --- |
| 3660 | // According to ECMA-262, section 11.2.3, page 44, the function to call |
| 3661 | // must be resolved after the arguments have been evaluated. The IC code |
| 3662 | // automatically handles this by loading the arguments before the function |
| 3663 | // is resolved in cache misses (this also holds for megamorphic calls). |
| 3664 | // ------------------------------------------------------------------------ |
| 3665 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3666 | if (var != NULL && var->is_possibly_eval()) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3667 | VirtualFrame::SpilledScope spilled_scope(frame_); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3668 | // ---------------------------------- |
| 3669 | // JavaScript example: 'eval(arg)' // eval is not known to be shadowed |
| 3670 | // ---------------------------------- |
| 3671 | |
| 3672 | // In a call to eval, we first call %ResolvePossiblyDirectEval to |
| 3673 | // resolve the function we need to call and the receiver of the |
| 3674 | // call. Then we call the resolved function using the given |
| 3675 | // arguments. |
| 3676 | // Prepare stack for call to resolved function. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3677 | Load(function); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3678 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 3679 | frame_->EmitPush(r2); // Slot for receiver |
| 3680 | int arg_count = args->length(); |
| 3681 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3682 | Load(args->at(i)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3683 | } |
| 3684 | |
| 3685 | // Prepare stack for call to ResolvePossiblyDirectEval. |
| 3686 | __ ldr(r1, MemOperand(sp, arg_count * kPointerSize + kPointerSize)); |
| 3687 | frame_->EmitPush(r1); |
| 3688 | if (arg_count > 0) { |
| 3689 | __ ldr(r1, MemOperand(sp, arg_count * kPointerSize)); |
| 3690 | frame_->EmitPush(r1); |
| 3691 | } else { |
| 3692 | frame_->EmitPush(r2); |
| 3693 | } |
| 3694 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3695 | // Push the receiver. |
| 3696 | __ ldr(r1, frame_->Receiver()); |
| 3697 | frame_->EmitPush(r1); |
| 3698 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3699 | // Resolve the call. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3700 | frame_->CallRuntime(Runtime::kResolvePossiblyDirectEval, 3); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3701 | |
| 3702 | // Touch up stack with the right values for the function and the receiver. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 3703 | __ str(r0, MemOperand(sp, (arg_count + 1) * kPointerSize)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3704 | __ str(r1, MemOperand(sp, arg_count * kPointerSize)); |
| 3705 | |
| 3706 | // Call the function. |
| 3707 | CodeForSourcePosition(node->position()); |
| 3708 | |
| 3709 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3710 | CallFunctionStub call_function(arg_count, in_loop, RECEIVER_MIGHT_BE_VALUE); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3711 | frame_->CallStub(&call_function, arg_count + 1); |
| 3712 | |
| 3713 | __ ldr(cp, frame_->Context()); |
| 3714 | // Remove the function from the stack. |
| 3715 | frame_->Drop(); |
| 3716 | frame_->EmitPush(r0); |
| 3717 | |
| 3718 | } else if (var != NULL && !var->is_this() && var->is_global()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3719 | // ---------------------------------- |
| 3720 | // JavaScript example: 'foo(1, 2, 3)' // foo is global |
| 3721 | // ---------------------------------- |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3722 | // Pass the global object as the receiver and let the IC stub |
| 3723 | // patch the stack to use the global proxy as 'this' in the |
| 3724 | // invoked function. |
| 3725 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3726 | |
| 3727 | // Load the arguments. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3728 | int arg_count = args->length(); |
| 3729 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3730 | Load(args->at(i)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3731 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3732 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3733 | VirtualFrame::SpilledScope spilled_scope(frame_); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3734 | // Setup the name register and call the IC initialization code. |
| 3735 | __ mov(r2, Operand(var->name())); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3736 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
| 3737 | Handle<Code> stub = ComputeCallInitialize(arg_count, in_loop); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3738 | CodeForSourcePosition(node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3739 | frame_->CallCodeObject(stub, RelocInfo::CODE_TARGET_CONTEXT, |
| 3740 | arg_count + 1); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3741 | __ ldr(cp, frame_->Context()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3742 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3743 | |
| 3744 | } else if (var != NULL && var->slot() != NULL && |
| 3745 | var->slot()->type() == Slot::LOOKUP) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3746 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3747 | // ---------------------------------- |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3748 | // JavaScript examples: |
| 3749 | // |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3750 | // with (obj) foo(1, 2, 3) // foo may be in obj. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3751 | // |
| 3752 | // function f() {}; |
| 3753 | // function g() { |
| 3754 | // eval(...); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3755 | // f(); // f could be in extension object. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3756 | // } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3757 | // ---------------------------------- |
| 3758 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3759 | // JumpTargets do not yet support merging frames so the frame must be |
| 3760 | // spilled when jumping to these targets. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3761 | JumpTarget slow, done; |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3762 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3763 | // Generate fast case for loading functions from slots that |
| 3764 | // correspond to local/global variables or arguments unless they |
| 3765 | // are shadowed by eval-introduced bindings. |
| 3766 | EmitDynamicLoadFromSlotFastCase(var->slot(), |
| 3767 | NOT_INSIDE_TYPEOF, |
| 3768 | &slow, |
| 3769 | &done); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3770 | |
| 3771 | slow.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3772 | // Load the function |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3773 | frame_->EmitPush(cp); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3774 | __ mov(r0, Operand(var->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3775 | frame_->EmitPush(r0); |
| 3776 | frame_->CallRuntime(Runtime::kLoadContextSlot, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3777 | // r0: slot value; r1: receiver |
| 3778 | |
| 3779 | // Load the receiver. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3780 | frame_->EmitPush(r0); // function |
| 3781 | frame_->EmitPush(r1); // receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3782 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 3783 | // If fast case code has been generated, emit code to push the |
| 3784 | // function and receiver and have the slow path jump around this |
| 3785 | // code. |
| 3786 | if (done.is_linked()) { |
| 3787 | JumpTarget call; |
| 3788 | call.Jump(); |
| 3789 | done.Bind(); |
| 3790 | frame_->EmitPush(r0); // function |
| 3791 | LoadGlobalReceiver(r1); // receiver |
| 3792 | call.Bind(); |
| 3793 | } |
| 3794 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3795 | // Call the function. At this point, everything is spilled but the |
| 3796 | // function and receiver are in r0 and r1. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3797 | CallWithArguments(args, NO_CALL_FUNCTION_FLAGS, node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3798 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3799 | |
| 3800 | } else if (property != NULL) { |
| 3801 | // Check if the key is a literal string. |
| 3802 | Literal* literal = property->key()->AsLiteral(); |
| 3803 | |
| 3804 | if (literal != NULL && literal->handle()->IsSymbol()) { |
| 3805 | // ------------------------------------------------------------------ |
| 3806 | // JavaScript example: 'object.foo(1, 2, 3)' or 'map["key"](1, 2, 3)' |
| 3807 | // ------------------------------------------------------------------ |
| 3808 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3809 | Handle<String> name = Handle<String>::cast(literal->handle()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3810 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3811 | if (ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION && |
| 3812 | name->IsEqualTo(CStrVector("apply")) && |
| 3813 | args->length() == 2 && |
| 3814 | args->at(1)->AsVariableProxy() != NULL && |
| 3815 | args->at(1)->AsVariableProxy()->IsArguments()) { |
| 3816 | // Use the optimized Function.prototype.apply that avoids |
| 3817 | // allocating lazily allocated arguments objects. |
| 3818 | CallApplyLazy(property->obj(), |
| 3819 | args->at(0), |
| 3820 | args->at(1)->AsVariableProxy(), |
| 3821 | node->position()); |
| 3822 | |
| 3823 | } else { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3824 | Load(property->obj()); // Receiver. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3825 | // Load the arguments. |
| 3826 | int arg_count = args->length(); |
| 3827 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3828 | Load(args->at(i)); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3829 | } |
| 3830 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3831 | VirtualFrame::SpilledScope spilled_scope(frame_); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 3832 | // Set the name register and call the IC initialization code. |
| 3833 | __ mov(r2, Operand(name)); |
| 3834 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
| 3835 | Handle<Code> stub = ComputeCallInitialize(arg_count, in_loop); |
| 3836 | CodeForSourcePosition(node->position()); |
| 3837 | frame_->CallCodeObject(stub, RelocInfo::CODE_TARGET, arg_count + 1); |
| 3838 | __ ldr(cp, frame_->Context()); |
| 3839 | frame_->EmitPush(r0); |
| 3840 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3841 | |
| 3842 | } else { |
| 3843 | // ------------------------------------------- |
| 3844 | // JavaScript example: 'array[index](1, 2, 3)' |
| 3845 | // ------------------------------------------- |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3846 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3847 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3848 | Load(property->obj()); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3849 | if (!property->is_synthetic()) { |
| 3850 | // Duplicate receiver for later use. |
| 3851 | __ ldr(r0, MemOperand(sp, 0)); |
| 3852 | frame_->EmitPush(r0); |
| 3853 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3854 | Load(property->key()); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 3855 | EmitKeyedLoad(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3856 | // Put the function below the receiver. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3857 | if (property->is_synthetic()) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3858 | // Use the global receiver. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3859 | frame_->EmitPush(r0); // Function. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3860 | LoadGlobalReceiver(r0); |
| 3861 | } else { |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 3862 | // Switch receiver and function. |
| 3863 | frame_->EmitPop(r1); // Receiver. |
| 3864 | frame_->EmitPush(r0); // Function. |
| 3865 | frame_->EmitPush(r1); // Receiver. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3866 | } |
| 3867 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3868 | // Call the function. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3869 | CallWithArguments(args, RECEIVER_MIGHT_BE_VALUE, node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3870 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3871 | } |
| 3872 | |
| 3873 | } else { |
| 3874 | // ---------------------------------- |
| 3875 | // JavaScript example: 'foo(1, 2, 3)' // foo is not global |
| 3876 | // ---------------------------------- |
| 3877 | |
| 3878 | // Load the function. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3879 | Load(function); |
| 3880 | |
| 3881 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3882 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3883 | // Pass the global proxy as the receiver. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3884 | LoadGlobalReceiver(r0); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3885 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3886 | // Call the function. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3887 | CallWithArguments(args, NO_CALL_FUNCTION_FLAGS, node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3888 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3889 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3890 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3891 | } |
| 3892 | |
| 3893 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3894 | void CodeGenerator::VisitCallNew(CallNew* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3895 | #ifdef DEBUG |
| 3896 | int original_height = frame_->height(); |
| 3897 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3898 | Comment cmnt(masm_, "[ CallNew"); |
| 3899 | |
| 3900 | // According to ECMA-262, section 11.2.2, page 44, the function |
| 3901 | // expression in new calls must be evaluated before the |
| 3902 | // arguments. This is different from ordinary calls, where the |
| 3903 | // actual function to call is resolved after the arguments have been |
| 3904 | // evaluated. |
| 3905 | |
| 3906 | // Compute function to call and use the global object as the |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3907 | // receiver. There is no need to use the global proxy here because |
| 3908 | // it will always be replaced with a newly allocated object. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3909 | Load(node->expression()); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3910 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3911 | |
| 3912 | // Push the arguments ("left-to-right") on the stack. |
| 3913 | ZoneList<Expression*>* args = node->arguments(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3914 | int arg_count = args->length(); |
| 3915 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3916 | Load(args->at(i)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3917 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3918 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3919 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 3920 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3921 | // r0: the number of arguments. |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 3922 | __ mov(r0, Operand(arg_count)); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3923 | // Load the function into r1 as per calling convention. |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 3924 | __ ldr(r1, frame_->ElementAt(arg_count + 1)); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 3925 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3926 | // Call the construct call builtin that handles allocation and |
| 3927 | // constructor invocation. |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 3928 | CodeForSourcePosition(node->position()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 3929 | Handle<Code> ic(Builtins::builtin(Builtins::JSConstructCall)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3930 | frame_->CallCodeObject(ic, RelocInfo::CONSTRUCT_CALL, arg_count + 1); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 3931 | |
| 3932 | // Discard old TOS value and push r0 on the stack (same as Pop(), push(r0)). |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3933 | __ str(r0, frame_->Top()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3934 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3935 | } |
| 3936 | |
| 3937 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3938 | void CodeGenerator::GenerateClassOf(ZoneList<Expression*>* args) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3939 | VirtualFrame::SpilledScope spilled_scope(frame_); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3940 | ASSERT(args->length() == 1); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3941 | JumpTarget leave, null, function, non_function_constructor; |
| 3942 | |
| 3943 | // Load the object into r0. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3944 | Load(args->at(0)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3945 | frame_->EmitPop(r0); |
| 3946 | |
| 3947 | // If the object is a smi, we return null. |
| 3948 | __ tst(r0, Operand(kSmiTagMask)); |
| 3949 | null.Branch(eq); |
| 3950 | |
| 3951 | // Check that the object is a JS object but take special care of JS |
| 3952 | // functions to make sure they have 'Function' as their class. |
| 3953 | __ CompareObjectType(r0, r0, r1, FIRST_JS_OBJECT_TYPE); |
| 3954 | null.Branch(lt); |
| 3955 | |
| 3956 | // As long as JS_FUNCTION_TYPE is the last instance type and it is |
| 3957 | // right after LAST_JS_OBJECT_TYPE, we can avoid checking for |
| 3958 | // LAST_JS_OBJECT_TYPE. |
| 3959 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 3960 | ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
| 3961 | __ cmp(r1, Operand(JS_FUNCTION_TYPE)); |
| 3962 | function.Branch(eq); |
| 3963 | |
| 3964 | // Check if the constructor in the map is a function. |
| 3965 | __ ldr(r0, FieldMemOperand(r0, Map::kConstructorOffset)); |
| 3966 | __ CompareObjectType(r0, r1, r1, JS_FUNCTION_TYPE); |
| 3967 | non_function_constructor.Branch(ne); |
| 3968 | |
| 3969 | // The r0 register now contains the constructor function. Grab the |
| 3970 | // instance class name from there. |
| 3971 | __ ldr(r0, FieldMemOperand(r0, JSFunction::kSharedFunctionInfoOffset)); |
| 3972 | __ ldr(r0, FieldMemOperand(r0, SharedFunctionInfo::kInstanceClassNameOffset)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3973 | frame_->EmitPush(r0); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3974 | leave.Jump(); |
| 3975 | |
| 3976 | // Functions have class 'Function'. |
| 3977 | function.Bind(); |
| 3978 | __ mov(r0, Operand(Factory::function_class_symbol())); |
| 3979 | frame_->EmitPush(r0); |
| 3980 | leave.Jump(); |
| 3981 | |
| 3982 | // Objects with a non-function constructor have class 'Object'. |
| 3983 | non_function_constructor.Bind(); |
| 3984 | __ mov(r0, Operand(Factory::Object_symbol())); |
| 3985 | frame_->EmitPush(r0); |
| 3986 | leave.Jump(); |
| 3987 | |
| 3988 | // Non-JS objects have class null. |
| 3989 | null.Bind(); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 3990 | __ LoadRoot(r0, Heap::kNullValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3991 | frame_->EmitPush(r0); |
| 3992 | |
| 3993 | // All done. |
| 3994 | leave.Bind(); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 3995 | } |
| 3996 | |
| 3997 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3998 | void CodeGenerator::GenerateValueOf(ZoneList<Expression*>* args) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 3999 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4000 | ASSERT(args->length() == 1); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4001 | JumpTarget leave; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4002 | Load(args->at(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4003 | frame_->EmitPop(r0); // r0 contains object. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4004 | // if (object->IsSmi()) return the object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4005 | __ tst(r0, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4006 | leave.Branch(eq); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4007 | // It is a heap object - get map. If (!object->IsJSValue()) return the object. |
| 4008 | __ CompareObjectType(r0, r1, r1, JS_VALUE_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4009 | leave.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4010 | // Load the value. |
| 4011 | __ ldr(r0, FieldMemOperand(r0, JSValue::kValueOffset)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4012 | leave.Bind(); |
| 4013 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4014 | } |
| 4015 | |
| 4016 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4017 | void CodeGenerator::GenerateSetValueOf(ZoneList<Expression*>* args) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4018 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4019 | ASSERT(args->length() == 2); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4020 | JumpTarget leave; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4021 | Load(args->at(0)); // Load the object. |
| 4022 | Load(args->at(1)); // Load the value. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4023 | frame_->EmitPop(r0); // r0 contains value |
| 4024 | frame_->EmitPop(r1); // r1 contains object |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4025 | // if (object->IsSmi()) return object. |
| 4026 | __ tst(r1, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4027 | leave.Branch(eq); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4028 | // It is a heap object - get map. If (!object->IsJSValue()) return the object. |
| 4029 | __ CompareObjectType(r1, r2, r2, JS_VALUE_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4030 | leave.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4031 | // Store the value. |
| 4032 | __ str(r0, FieldMemOperand(r1, JSValue::kValueOffset)); |
| 4033 | // Update the write barrier. |
| 4034 | __ mov(r2, Operand(JSValue::kValueOffset - kHeapObjectTag)); |
| 4035 | __ RecordWrite(r1, r2, r3); |
| 4036 | // Leave. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4037 | leave.Bind(); |
| 4038 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4039 | } |
| 4040 | |
| 4041 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4042 | void CodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4043 | ASSERT(args->length() == 1); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4044 | Load(args->at(0)); |
| 4045 | Register reg = frame_->PopToRegister(); |
| 4046 | __ tst(reg, Operand(kSmiTagMask)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4047 | cc_reg_ = eq; |
| 4048 | } |
| 4049 | |
| 4050 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 4051 | void CodeGenerator::GenerateLog(ZoneList<Expression*>* args) { |
| 4052 | // See comment in CodeGenerator::GenerateLog in codegen-ia32.cc. |
| 4053 | ASSERT_EQ(args->length(), 3); |
christian.plesner.hansen@gmail.com | aca4968 | 2009-01-07 14:29:04 +0000 | [diff] [blame] | 4054 | #ifdef ENABLE_LOGGING_AND_PROFILING |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 4055 | if (ShouldGenerateLog(args->at(0))) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4056 | Load(args->at(1)); |
| 4057 | Load(args->at(2)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4058 | frame_->CallRuntime(Runtime::kLog, 2); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 4059 | } |
christian.plesner.hansen@gmail.com | aca4968 | 2009-01-07 14:29:04 +0000 | [diff] [blame] | 4060 | #endif |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4061 | frame_->EmitPushRoot(Heap::kUndefinedValueRootIndex); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 4062 | } |
| 4063 | |
| 4064 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4065 | void CodeGenerator::GenerateIsNonNegativeSmi(ZoneList<Expression*>* args) { |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 4066 | ASSERT(args->length() == 1); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4067 | Load(args->at(0)); |
| 4068 | Register reg = frame_->PopToRegister(); |
| 4069 | __ tst(reg, Operand(kSmiTagMask | 0x80000000u)); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 4070 | cc_reg_ = eq; |
| 4071 | } |
| 4072 | |
| 4073 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4074 | // Generates the Math.pow method - currently just calls runtime. |
| 4075 | void CodeGenerator::GenerateMathPow(ZoneList<Expression*>* args) { |
| 4076 | ASSERT(args->length() == 2); |
| 4077 | Load(args->at(0)); |
| 4078 | Load(args->at(1)); |
| 4079 | frame_->CallRuntime(Runtime::kMath_pow, 2); |
| 4080 | frame_->EmitPush(r0); |
| 4081 | } |
| 4082 | |
| 4083 | |
| 4084 | // Generates the Math.sqrt method - currently just calls runtime. |
| 4085 | void CodeGenerator::GenerateMathSqrt(ZoneList<Expression*>* args) { |
| 4086 | ASSERT(args->length() == 1); |
| 4087 | Load(args->at(0)); |
| 4088 | frame_->CallRuntime(Runtime::kMath_sqrt, 1); |
| 4089 | frame_->EmitPush(r0); |
| 4090 | } |
| 4091 | |
| 4092 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4093 | class DeferredStringCharCodeAt : public DeferredCode { |
| 4094 | public: |
| 4095 | DeferredStringCharCodeAt(Register object, |
| 4096 | Register index, |
| 4097 | Register scratch, |
| 4098 | Register result) |
| 4099 | : result_(result), |
| 4100 | char_code_at_generator_(object, |
| 4101 | index, |
| 4102 | scratch, |
| 4103 | result, |
| 4104 | &need_conversion_, |
| 4105 | &need_conversion_, |
| 4106 | &index_out_of_range_, |
| 4107 | STRING_INDEX_IS_NUMBER) {} |
| 4108 | |
| 4109 | StringCharCodeAtGenerator* fast_case_generator() { |
| 4110 | return &char_code_at_generator_; |
| 4111 | } |
| 4112 | |
| 4113 | virtual void Generate() { |
| 4114 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 4115 | char_code_at_generator_.GenerateSlow(masm(), call_helper); |
| 4116 | |
| 4117 | __ bind(&need_conversion_); |
| 4118 | // Move the undefined value into the result register, which will |
| 4119 | // trigger conversion. |
| 4120 | __ LoadRoot(result_, Heap::kUndefinedValueRootIndex); |
| 4121 | __ jmp(exit_label()); |
| 4122 | |
| 4123 | __ bind(&index_out_of_range_); |
| 4124 | // When the index is out of range, the spec requires us to return |
| 4125 | // NaN. |
| 4126 | __ LoadRoot(result_, Heap::kNanValueRootIndex); |
| 4127 | __ jmp(exit_label()); |
| 4128 | } |
| 4129 | |
| 4130 | private: |
| 4131 | Register result_; |
| 4132 | |
| 4133 | Label need_conversion_; |
| 4134 | Label index_out_of_range_; |
| 4135 | |
| 4136 | StringCharCodeAtGenerator char_code_at_generator_; |
| 4137 | }; |
| 4138 | |
| 4139 | |
| 4140 | // This generates code that performs a String.prototype.charCodeAt() call |
| 4141 | // or returns a smi in order to trigger conversion. |
| 4142 | void CodeGenerator::GenerateStringCharCodeAt(ZoneList<Expression*>* args) { |
| 4143 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4144 | Comment(masm_, "[ GenerateStringCharCodeAt"); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4145 | ASSERT(args->length() == 2); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4146 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4147 | Load(args->at(0)); |
| 4148 | Load(args->at(1)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4149 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4150 | Register index = r1; |
| 4151 | Register object = r2; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4152 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4153 | frame_->EmitPop(r1); |
| 4154 | frame_->EmitPop(r2); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 4155 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4156 | // We need two extra registers. |
| 4157 | Register scratch = r3; |
| 4158 | Register result = r0; |
| 4159 | |
| 4160 | DeferredStringCharCodeAt* deferred = |
| 4161 | new DeferredStringCharCodeAt(object, |
| 4162 | index, |
| 4163 | scratch, |
| 4164 | result); |
| 4165 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 4166 | deferred->BindExit(); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4167 | frame_->EmitPush(result); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 4168 | } |
| 4169 | |
| 4170 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4171 | class DeferredStringCharFromCode : public DeferredCode { |
| 4172 | public: |
| 4173 | DeferredStringCharFromCode(Register code, |
| 4174 | Register result) |
| 4175 | : char_from_code_generator_(code, result) {} |
| 4176 | |
| 4177 | StringCharFromCodeGenerator* fast_case_generator() { |
| 4178 | return &char_from_code_generator_; |
| 4179 | } |
| 4180 | |
| 4181 | virtual void Generate() { |
| 4182 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 4183 | char_from_code_generator_.GenerateSlow(masm(), call_helper); |
| 4184 | } |
| 4185 | |
| 4186 | private: |
| 4187 | StringCharFromCodeGenerator char_from_code_generator_; |
| 4188 | }; |
| 4189 | |
| 4190 | |
| 4191 | // Generates code for creating a one-char string from a char code. |
| 4192 | void CodeGenerator::GenerateStringCharFromCode(ZoneList<Expression*>* args) { |
| 4193 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4194 | Comment(masm_, "[ GenerateStringCharFromCode"); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4195 | ASSERT(args->length() == 1); |
| 4196 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4197 | Load(args->at(0)); |
| 4198 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4199 | Register code = r1; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4200 | Register result = r0; |
| 4201 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4202 | frame_->EmitPop(code); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4203 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4204 | DeferredStringCharFromCode* deferred = new DeferredStringCharFromCode( |
| 4205 | code, result); |
| 4206 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 4207 | deferred->BindExit(); |
| 4208 | frame_->EmitPush(result); |
| 4209 | } |
| 4210 | |
| 4211 | |
| 4212 | class DeferredStringCharAt : public DeferredCode { |
| 4213 | public: |
| 4214 | DeferredStringCharAt(Register object, |
| 4215 | Register index, |
| 4216 | Register scratch1, |
| 4217 | Register scratch2, |
| 4218 | Register result) |
| 4219 | : result_(result), |
| 4220 | char_at_generator_(object, |
| 4221 | index, |
| 4222 | scratch1, |
| 4223 | scratch2, |
| 4224 | result, |
| 4225 | &need_conversion_, |
| 4226 | &need_conversion_, |
| 4227 | &index_out_of_range_, |
| 4228 | STRING_INDEX_IS_NUMBER) {} |
| 4229 | |
| 4230 | StringCharAtGenerator* fast_case_generator() { |
| 4231 | return &char_at_generator_; |
| 4232 | } |
| 4233 | |
| 4234 | virtual void Generate() { |
| 4235 | VirtualFrameRuntimeCallHelper call_helper(frame_state()); |
| 4236 | char_at_generator_.GenerateSlow(masm(), call_helper); |
| 4237 | |
| 4238 | __ bind(&need_conversion_); |
| 4239 | // Move smi zero into the result register, which will trigger |
| 4240 | // conversion. |
| 4241 | __ mov(result_, Operand(Smi::FromInt(0))); |
| 4242 | __ jmp(exit_label()); |
| 4243 | |
| 4244 | __ bind(&index_out_of_range_); |
| 4245 | // When the index is out of range, the spec requires us to return |
| 4246 | // the empty string. |
| 4247 | __ LoadRoot(result_, Heap::kEmptyStringRootIndex); |
| 4248 | __ jmp(exit_label()); |
| 4249 | } |
| 4250 | |
| 4251 | private: |
| 4252 | Register result_; |
| 4253 | |
| 4254 | Label need_conversion_; |
| 4255 | Label index_out_of_range_; |
| 4256 | |
| 4257 | StringCharAtGenerator char_at_generator_; |
| 4258 | }; |
| 4259 | |
| 4260 | |
| 4261 | // This generates code that performs a String.prototype.charAt() call |
| 4262 | // or returns a smi in order to trigger conversion. |
| 4263 | void CodeGenerator::GenerateStringCharAt(ZoneList<Expression*>* args) { |
| 4264 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4265 | Comment(masm_, "[ GenerateStringCharAt"); |
| 4266 | ASSERT(args->length() == 2); |
| 4267 | |
| 4268 | Load(args->at(0)); |
| 4269 | Load(args->at(1)); |
| 4270 | |
| 4271 | Register index = r1; |
| 4272 | Register object = r2; |
| 4273 | |
| 4274 | frame_->EmitPop(r1); |
| 4275 | frame_->EmitPop(r2); |
| 4276 | |
| 4277 | // We need three extra registers. |
| 4278 | Register scratch1 = r3; |
| 4279 | Register scratch2 = r4; |
| 4280 | Register result = r0; |
| 4281 | |
| 4282 | DeferredStringCharAt* deferred = |
| 4283 | new DeferredStringCharAt(object, |
| 4284 | index, |
| 4285 | scratch1, |
| 4286 | scratch2, |
| 4287 | result); |
| 4288 | deferred->fast_case_generator()->GenerateFast(masm_); |
| 4289 | deferred->BindExit(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4290 | frame_->EmitPush(result); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4291 | } |
| 4292 | |
| 4293 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4294 | void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 4295 | ASSERT(args->length() == 1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4296 | Load(args->at(0)); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4297 | JumpTarget answer; |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 4298 | // We need the CC bits to come out as not_equal in the case where the |
| 4299 | // object is a smi. This can't be done with the usual test opcode so |
| 4300 | // we use XOR to get the right CC bits. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4301 | Register possible_array = frame_->PopToRegister(); |
| 4302 | Register scratch = VirtualFrame::scratch0(); |
| 4303 | __ and_(scratch, possible_array, Operand(kSmiTagMask)); |
| 4304 | __ eor(scratch, scratch, Operand(kSmiTagMask), SetCC); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4305 | answer.Branch(ne); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4306 | // It is a heap object - get the map. Check if the object is a JS array. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4307 | __ CompareObjectType(possible_array, scratch, scratch, JS_ARRAY_TYPE); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4308 | answer.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4309 | cc_reg_ = eq; |
| 4310 | } |
| 4311 | |
| 4312 | |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4313 | void CodeGenerator::GenerateIsRegExp(ZoneList<Expression*>* args) { |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4314 | ASSERT(args->length() == 1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4315 | Load(args->at(0)); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4316 | JumpTarget answer; |
| 4317 | // We need the CC bits to come out as not_equal in the case where the |
| 4318 | // object is a smi. This can't be done with the usual test opcode so |
| 4319 | // we use XOR to get the right CC bits. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4320 | Register possible_regexp = frame_->PopToRegister(); |
| 4321 | Register scratch = VirtualFrame::scratch0(); |
| 4322 | __ and_(scratch, possible_regexp, Operand(kSmiTagMask)); |
| 4323 | __ eor(scratch, scratch, Operand(kSmiTagMask), SetCC); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4324 | answer.Branch(ne); |
| 4325 | // It is a heap object - get the map. Check if the object is a regexp. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4326 | __ CompareObjectType(possible_regexp, scratch, scratch, JS_REGEXP_TYPE); |
fschneider@chromium.org | b95b98b | 2010-02-23 10:34:29 +0000 | [diff] [blame] | 4327 | answer.Bind(); |
| 4328 | cc_reg_ = eq; |
| 4329 | } |
| 4330 | |
| 4331 | |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4332 | void CodeGenerator::GenerateIsObject(ZoneList<Expression*>* args) { |
| 4333 | // This generates a fast version of: |
| 4334 | // (typeof(arg) === 'object' || %_ClassOf(arg) == 'RegExp') |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4335 | ASSERT(args->length() == 1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4336 | Load(args->at(0)); |
| 4337 | Register possible_object = frame_->PopToRegister(); |
| 4338 | __ tst(possible_object, Operand(kSmiTagMask)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4339 | false_target()->Branch(eq); |
| 4340 | |
| 4341 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4342 | __ cmp(possible_object, ip); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4343 | true_target()->Branch(eq); |
| 4344 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4345 | Register map_reg = VirtualFrame::scratch0(); |
| 4346 | __ ldr(map_reg, FieldMemOperand(possible_object, HeapObject::kMapOffset)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4347 | // Undetectable objects behave like undefined when tested with typeof. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4348 | __ ldrb(possible_object, FieldMemOperand(map_reg, Map::kBitFieldOffset)); |
| 4349 | __ tst(possible_object, Operand(1 << Map::kIsUndetectable)); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4350 | false_target()->Branch(ne); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4351 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4352 | __ ldrb(possible_object, FieldMemOperand(map_reg, Map::kInstanceTypeOffset)); |
| 4353 | __ cmp(possible_object, Operand(FIRST_JS_OBJECT_TYPE)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4354 | false_target()->Branch(lt); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4355 | __ cmp(possible_object, Operand(LAST_JS_OBJECT_TYPE)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4356 | cc_reg_ = le; |
| 4357 | } |
| 4358 | |
| 4359 | |
| 4360 | void CodeGenerator::GenerateIsFunction(ZoneList<Expression*>* args) { |
| 4361 | // This generates a fast version of: |
| 4362 | // (%_ClassOf(arg) === 'Function') |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4363 | ASSERT(args->length() == 1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4364 | Load(args->at(0)); |
| 4365 | Register possible_function = frame_->PopToRegister(); |
| 4366 | __ tst(possible_function, Operand(kSmiTagMask)); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4367 | false_target()->Branch(eq); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4368 | Register map_reg = VirtualFrame::scratch0(); |
| 4369 | Register scratch = VirtualFrame::scratch1(); |
| 4370 | __ CompareObjectType(possible_function, map_reg, scratch, JS_FUNCTION_TYPE); |
ager@chromium.org | 6141cbe | 2009-11-20 12:14:52 +0000 | [diff] [blame] | 4371 | cc_reg_ = eq; |
| 4372 | } |
| 4373 | |
| 4374 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4375 | void CodeGenerator::GenerateIsUndetectableObject(ZoneList<Expression*>* args) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4376 | ASSERT(args->length() == 1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4377 | Load(args->at(0)); |
| 4378 | Register possible_undetectable = frame_->PopToRegister(); |
| 4379 | __ tst(possible_undetectable, Operand(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4380 | false_target()->Branch(eq); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4381 | Register scratch = VirtualFrame::scratch0(); |
| 4382 | __ ldr(scratch, |
| 4383 | FieldMemOperand(possible_undetectable, HeapObject::kMapOffset)); |
| 4384 | __ ldrb(scratch, FieldMemOperand(scratch, Map::kBitFieldOffset)); |
| 4385 | __ tst(scratch, Operand(1 << Map::kIsUndetectable)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4386 | cc_reg_ = ne; |
| 4387 | } |
| 4388 | |
| 4389 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 4390 | void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 4391 | ASSERT(args->length() == 0); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4392 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4393 | Register scratch0 = VirtualFrame::scratch0(); |
| 4394 | Register scratch1 = VirtualFrame::scratch1(); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4395 | // Get the frame pointer for the calling frame. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4396 | __ ldr(scratch0, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4397 | |
| 4398 | // Skip the arguments adaptor frame if it exists. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4399 | __ ldr(scratch1, |
| 4400 | MemOperand(scratch0, StandardFrameConstants::kContextOffset)); |
| 4401 | __ cmp(scratch1, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4402 | __ ldr(scratch0, |
| 4403 | MemOperand(scratch0, StandardFrameConstants::kCallerFPOffset), eq); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4404 | |
| 4405 | // Check the marker in the calling frame. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4406 | __ ldr(scratch1, |
| 4407 | MemOperand(scratch0, StandardFrameConstants::kMarkerOffset)); |
| 4408 | __ cmp(scratch1, Operand(Smi::FromInt(StackFrame::CONSTRUCT))); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4409 | cc_reg_ = eq; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 4410 | } |
| 4411 | |
| 4412 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4413 | void CodeGenerator::GenerateArgumentsLength(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4414 | ASSERT(args->length() == 0); |
| 4415 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4416 | Register tos = frame_->GetTOSRegister(); |
| 4417 | Register scratch0 = VirtualFrame::scratch0(); |
| 4418 | Register scratch1 = VirtualFrame::scratch1(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4419 | |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 4420 | // Check if the calling frame is an arguments adaptor frame. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4421 | __ ldr(scratch0, |
| 4422 | MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 4423 | __ ldr(scratch1, |
| 4424 | MemOperand(scratch0, StandardFrameConstants::kContextOffset)); |
| 4425 | __ cmp(scratch1, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4426 | |
| 4427 | // Get the number of formal parameters. |
| 4428 | __ mov(tos, Operand(Smi::FromInt(scope()->num_parameters())), LeaveCC, ne); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 4429 | |
| 4430 | // Arguments adaptor case: Read the arguments length from the |
| 4431 | // adaptor frame. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4432 | __ ldr(tos, |
| 4433 | MemOperand(scratch0, ArgumentsAdaptorFrameConstants::kLengthOffset), |
| 4434 | eq); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 4435 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4436 | frame_->EmitPush(tos); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4437 | } |
| 4438 | |
| 4439 | |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 4440 | void CodeGenerator::GenerateArguments(ZoneList<Expression*>* args) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4441 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4442 | ASSERT(args->length() == 1); |
| 4443 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 4444 | // Satisfy contract with ArgumentsAccessStub: |
| 4445 | // Load the key into r1 and the formal parameters count into r0. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4446 | Load(args->at(0)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4447 | frame_->EmitPop(r1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4448 | __ mov(r0, Operand(Smi::FromInt(scope()->num_parameters()))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4449 | |
| 4450 | // Call the shared stub to get to arguments[key]. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4451 | ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4452 | frame_->CallStub(&stub, 0); |
| 4453 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4454 | } |
| 4455 | |
| 4456 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4457 | void CodeGenerator::GenerateRandomHeapNumber( |
| 4458 | ZoneList<Expression*>* args) { |
| 4459 | VirtualFrame::SpilledScope spilled_scope(frame_); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4460 | ASSERT(args->length() == 0); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4461 | |
| 4462 | Label slow_allocate_heapnumber; |
| 4463 | Label heapnumber_allocated; |
| 4464 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4465 | __ AllocateHeapNumber(r4, r1, r2, &slow_allocate_heapnumber); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4466 | __ jmp(&heapnumber_allocated); |
| 4467 | |
| 4468 | __ bind(&slow_allocate_heapnumber); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4469 | // To allocate a heap number, and ensure that it is not a smi, we |
| 4470 | // call the runtime function FUnaryMinus on 0, returning the double |
| 4471 | // -0.0. A new, distinct heap number is returned each time. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4472 | __ mov(r0, Operand(Smi::FromInt(0))); |
| 4473 | __ push(r0); |
| 4474 | __ CallRuntime(Runtime::kNumberUnaryMinus, 1); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4475 | __ mov(r4, Operand(r0)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4476 | |
| 4477 | __ bind(&heapnumber_allocated); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4478 | |
| 4479 | // Convert 32 random bits in r0 to 0.(32 random bits) in a double |
| 4480 | // by computing: |
| 4481 | // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). |
| 4482 | if (CpuFeatures::IsSupported(VFP3)) { |
| 4483 | __ PrepareCallCFunction(0, r1); |
| 4484 | __ CallCFunction(ExternalReference::random_uint32_function(), 0); |
| 4485 | |
| 4486 | CpuFeatures::Scope scope(VFP3); |
| 4487 | // 0x41300000 is the top half of 1.0 x 2^20 as a double. |
| 4488 | // Create this constant using mov/orr to avoid PC relative load. |
| 4489 | __ mov(r1, Operand(0x41000000)); |
| 4490 | __ orr(r1, r1, Operand(0x300000)); |
| 4491 | // Move 0x41300000xxxxxxxx (x = random bits) to VFP. |
| 4492 | __ vmov(d7, r0, r1); |
| 4493 | // Move 0x4130000000000000 to VFP. |
| 4494 | __ mov(r0, Operand(0)); |
| 4495 | __ vmov(d8, r0, r1); |
| 4496 | // Subtract and store the result in the heap number. |
| 4497 | __ vsub(d7, d7, d8); |
| 4498 | __ sub(r0, r4, Operand(kHeapObjectTag)); |
| 4499 | __ vstr(d7, r0, HeapNumber::kValueOffset); |
| 4500 | frame_->EmitPush(r4); |
| 4501 | } else { |
| 4502 | __ mov(r0, Operand(r4)); |
| 4503 | __ PrepareCallCFunction(1, r1); |
| 4504 | __ CallCFunction( |
| 4505 | ExternalReference::fill_heap_number_with_random_function(), 1); |
| 4506 | frame_->EmitPush(r0); |
| 4507 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 4508 | } |
| 4509 | |
| 4510 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4511 | void CodeGenerator::GenerateStringAdd(ZoneList<Expression*>* args) { |
| 4512 | ASSERT_EQ(2, args->length()); |
| 4513 | |
| 4514 | Load(args->at(0)); |
| 4515 | Load(args->at(1)); |
| 4516 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4517 | StringAddStub stub(NO_STRING_ADD_FLAGS); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4518 | frame_->SpillAll(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4519 | frame_->CallStub(&stub, 2); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4520 | frame_->EmitPush(r0); |
| 4521 | } |
| 4522 | |
| 4523 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4524 | void CodeGenerator::GenerateSubString(ZoneList<Expression*>* args) { |
| 4525 | ASSERT_EQ(3, args->length()); |
| 4526 | |
| 4527 | Load(args->at(0)); |
| 4528 | Load(args->at(1)); |
| 4529 | Load(args->at(2)); |
| 4530 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4531 | SubStringStub stub; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4532 | frame_->SpillAll(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4533 | frame_->CallStub(&stub, 3); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4534 | frame_->EmitPush(r0); |
| 4535 | } |
| 4536 | |
| 4537 | |
| 4538 | void CodeGenerator::GenerateStringCompare(ZoneList<Expression*>* args) { |
| 4539 | ASSERT_EQ(2, args->length()); |
| 4540 | |
| 4541 | Load(args->at(0)); |
| 4542 | Load(args->at(1)); |
| 4543 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4544 | StringCompareStub stub; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4545 | frame_->SpillAll(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4546 | frame_->CallStub(&stub, 2); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4547 | frame_->EmitPush(r0); |
| 4548 | } |
| 4549 | |
| 4550 | |
| 4551 | void CodeGenerator::GenerateRegExpExec(ZoneList<Expression*>* args) { |
| 4552 | ASSERT_EQ(4, args->length()); |
| 4553 | |
| 4554 | Load(args->at(0)); |
| 4555 | Load(args->at(1)); |
| 4556 | Load(args->at(2)); |
| 4557 | Load(args->at(3)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4558 | RegExpExecStub stub; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4559 | frame_->SpillAll(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4560 | frame_->CallStub(&stub, 4); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 4561 | frame_->EmitPush(r0); |
| 4562 | } |
| 4563 | |
| 4564 | |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 4565 | void CodeGenerator::GenerateRegExpConstructResult(ZoneList<Expression*>* args) { |
| 4566 | // No stub. This code only occurs a few times in regexp.js. |
| 4567 | const int kMaxInlineLength = 100; |
| 4568 | ASSERT_EQ(3, args->length()); |
| 4569 | Load(args->at(0)); // Size of array, smi. |
| 4570 | Load(args->at(1)); // "index" property value. |
| 4571 | Load(args->at(2)); // "input" property value. |
| 4572 | { |
| 4573 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4574 | Label slowcase; |
| 4575 | Label done; |
| 4576 | __ ldr(r1, MemOperand(sp, kPointerSize * 2)); |
| 4577 | STATIC_ASSERT(kSmiTag == 0); |
| 4578 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4579 | __ tst(r1, Operand(kSmiTagMask)); |
| 4580 | __ b(ne, &slowcase); |
| 4581 | __ cmp(r1, Operand(Smi::FromInt(kMaxInlineLength))); |
| 4582 | __ b(hi, &slowcase); |
| 4583 | // Smi-tagging is equivalent to multiplying by 2. |
| 4584 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 4585 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 4586 | // Elements: [Map][Length][..elements..] |
| 4587 | // Size of JSArray with two in-object properties and the header of a |
| 4588 | // FixedArray. |
| 4589 | int objects_size = |
| 4590 | (JSRegExpResult::kSize + FixedArray::kHeaderSize) / kPointerSize; |
| 4591 | __ mov(r5, Operand(r1, LSR, kSmiTagSize + kSmiShiftSize)); |
| 4592 | __ add(r2, r5, Operand(objects_size)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 4593 | __ AllocateInNewSpace( |
| 4594 | r2, // In: Size, in words. |
| 4595 | r0, // Out: Start of allocation (tagged). |
| 4596 | r3, // Scratch register. |
| 4597 | r4, // Scratch register. |
| 4598 | &slowcase, |
| 4599 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 4600 | // r0: Start of allocated area, object-tagged. |
| 4601 | // r1: Number of elements in array, as smi. |
| 4602 | // r5: Number of elements, untagged. |
| 4603 | |
| 4604 | // Set JSArray map to global.regexp_result_map(). |
| 4605 | // Set empty properties FixedArray. |
| 4606 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 4607 | // Interleave operations for better latency. |
| 4608 | __ ldr(r2, ContextOperand(cp, Context::GLOBAL_INDEX)); |
| 4609 | __ add(r3, r0, Operand(JSRegExpResult::kSize)); |
| 4610 | __ mov(r4, Operand(Factory::empty_fixed_array())); |
| 4611 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalContextOffset)); |
| 4612 | __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 4613 | __ ldr(r2, ContextOperand(r2, Context::REGEXP_RESULT_MAP_INDEX)); |
| 4614 | __ str(r4, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 4615 | __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 4616 | |
| 4617 | // Set input, index and length fields from arguments. |
| 4618 | __ ldm(ia_w, sp, static_cast<RegList>(r2.bit() | r4.bit())); |
| 4619 | __ str(r1, FieldMemOperand(r0, JSArray::kLengthOffset)); |
| 4620 | __ add(sp, sp, Operand(kPointerSize)); |
| 4621 | __ str(r4, FieldMemOperand(r0, JSRegExpResult::kIndexOffset)); |
| 4622 | __ str(r2, FieldMemOperand(r0, JSRegExpResult::kInputOffset)); |
| 4623 | |
| 4624 | // Fill out the elements FixedArray. |
| 4625 | // r0: JSArray, tagged. |
| 4626 | // r3: FixedArray, tagged. |
| 4627 | // r5: Number of elements in array, untagged. |
| 4628 | |
| 4629 | // Set map. |
| 4630 | __ mov(r2, Operand(Factory::fixed_array_map())); |
| 4631 | __ str(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 4632 | // Set FixedArray length. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4633 | __ mov(r6, Operand(r5, LSL, kSmiTagSize)); |
| 4634 | __ str(r6, FieldMemOperand(r3, FixedArray::kLengthOffset)); |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 4635 | // Fill contents of fixed-array with the-hole. |
| 4636 | __ mov(r2, Operand(Factory::the_hole_value())); |
| 4637 | __ add(r3, r3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4638 | // Fill fixed array elements with hole. |
| 4639 | // r0: JSArray, tagged. |
| 4640 | // r2: the hole. |
| 4641 | // r3: Start of elements in FixedArray. |
| 4642 | // r5: Number of elements to fill. |
| 4643 | Label loop; |
| 4644 | __ tst(r5, Operand(r5)); |
| 4645 | __ bind(&loop); |
| 4646 | __ b(le, &done); // Jump if r1 is negative or zero. |
| 4647 | __ sub(r5, r5, Operand(1), SetCC); |
| 4648 | __ str(r2, MemOperand(r3, r5, LSL, kPointerSizeLog2)); |
| 4649 | __ jmp(&loop); |
| 4650 | |
| 4651 | __ bind(&slowcase); |
| 4652 | __ CallRuntime(Runtime::kRegExpConstructResult, 3); |
| 4653 | |
| 4654 | __ bind(&done); |
| 4655 | } |
| 4656 | frame_->Forget(3); |
| 4657 | frame_->EmitPush(r0); |
| 4658 | } |
| 4659 | |
| 4660 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4661 | class DeferredSearchCache: public DeferredCode { |
| 4662 | public: |
| 4663 | DeferredSearchCache(Register dst, Register cache, Register key) |
| 4664 | : dst_(dst), cache_(cache), key_(key) { |
| 4665 | set_comment("[ DeferredSearchCache"); |
| 4666 | } |
| 4667 | |
| 4668 | virtual void Generate(); |
| 4669 | |
| 4670 | private: |
| 4671 | Register dst_, cache_, key_; |
| 4672 | }; |
| 4673 | |
| 4674 | |
| 4675 | void DeferredSearchCache::Generate() { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 4676 | __ Push(cache_, key_); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4677 | __ CallRuntime(Runtime::kGetFromCache, 2); |
| 4678 | if (!dst_.is(r0)) { |
| 4679 | __ mov(dst_, r0); |
| 4680 | } |
| 4681 | } |
| 4682 | |
| 4683 | |
| 4684 | void CodeGenerator::GenerateGetFromCache(ZoneList<Expression*>* args) { |
| 4685 | ASSERT_EQ(2, args->length()); |
| 4686 | |
| 4687 | ASSERT_NE(NULL, args->at(0)->AsLiteral()); |
| 4688 | int cache_id = Smi::cast(*(args->at(0)->AsLiteral()->handle()))->value(); |
| 4689 | |
| 4690 | Handle<FixedArray> jsfunction_result_caches( |
| 4691 | Top::global_context()->jsfunction_result_caches()); |
| 4692 | if (jsfunction_result_caches->length() <= cache_id) { |
| 4693 | __ Abort("Attempt to use undefined cache."); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4694 | frame_->EmitPushRoot(Heap::kUndefinedValueRootIndex); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4695 | return; |
| 4696 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4697 | |
| 4698 | Load(args->at(1)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4699 | |
| 4700 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4701 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4702 | frame_->EmitPop(r2); |
| 4703 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 4704 | __ ldr(r1, ContextOperand(cp, Context::GLOBAL_INDEX)); |
| 4705 | __ ldr(r1, FieldMemOperand(r1, GlobalObject::kGlobalContextOffset)); |
| 4706 | __ ldr(r1, ContextOperand(r1, Context::JSFUNCTION_RESULT_CACHES_INDEX)); |
| 4707 | __ ldr(r1, FieldMemOperand(r1, FixedArray::OffsetOfElementAt(cache_id))); |
| 4708 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4709 | DeferredSearchCache* deferred = new DeferredSearchCache(r0, r1, r2); |
| 4710 | |
| 4711 | const int kFingerOffset = |
| 4712 | FixedArray::OffsetOfElementAt(JSFunctionResultCache::kFingerIndex); |
| 4713 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4714 | __ ldr(r0, FieldMemOperand(r1, kFingerOffset)); |
| 4715 | // r0 now holds finger offset as a smi. |
| 4716 | __ add(r3, r1, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4717 | // r3 now points to the start of fixed array elements. |
| 4718 | __ ldr(r0, MemOperand(r3, r0, LSL, kPointerSizeLog2 - kSmiTagSize, PreIndex)); |
| 4719 | // Note side effect of PreIndex: r3 now points to the key of the pair. |
| 4720 | __ cmp(r2, r0); |
| 4721 | deferred->Branch(ne); |
| 4722 | |
| 4723 | __ ldr(r0, MemOperand(r3, kPointerSize)); |
| 4724 | |
| 4725 | deferred->BindExit(); |
| 4726 | frame_->EmitPush(r0); |
| 4727 | } |
| 4728 | |
| 4729 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4730 | void CodeGenerator::GenerateNumberToString(ZoneList<Expression*>* args) { |
| 4731 | ASSERT_EQ(args->length(), 1); |
| 4732 | |
| 4733 | // Load the argument on the stack and jump to the runtime. |
| 4734 | Load(args->at(0)); |
| 4735 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4736 | NumberToStringStub stub; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4737 | frame_->SpillAll(); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 4738 | frame_->CallStub(&stub, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4739 | frame_->EmitPush(r0); |
| 4740 | } |
| 4741 | |
| 4742 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4743 | class DeferredSwapElements: public DeferredCode { |
| 4744 | public: |
| 4745 | DeferredSwapElements(Register object, Register index1, Register index2) |
| 4746 | : object_(object), index1_(index1), index2_(index2) { |
| 4747 | set_comment("[ DeferredSwapElements"); |
| 4748 | } |
| 4749 | |
| 4750 | virtual void Generate(); |
| 4751 | |
| 4752 | private: |
| 4753 | Register object_, index1_, index2_; |
| 4754 | }; |
| 4755 | |
| 4756 | |
| 4757 | void DeferredSwapElements::Generate() { |
| 4758 | __ push(object_); |
| 4759 | __ push(index1_); |
| 4760 | __ push(index2_); |
| 4761 | __ CallRuntime(Runtime::kSwapElements, 3); |
| 4762 | } |
| 4763 | |
| 4764 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 4765 | void CodeGenerator::GenerateSwapElements(ZoneList<Expression*>* args) { |
| 4766 | Comment cmnt(masm_, "[ GenerateSwapElements"); |
| 4767 | |
| 4768 | ASSERT_EQ(3, args->length()); |
| 4769 | |
| 4770 | Load(args->at(0)); |
| 4771 | Load(args->at(1)); |
| 4772 | Load(args->at(2)); |
| 4773 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4774 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4775 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4776 | Register index2 = r2; |
| 4777 | Register index1 = r1; |
| 4778 | Register object = r0; |
| 4779 | Register tmp1 = r3; |
| 4780 | Register tmp2 = r4; |
| 4781 | |
| 4782 | frame_->EmitPop(index2); |
| 4783 | frame_->EmitPop(index1); |
| 4784 | frame_->EmitPop(object); |
| 4785 | |
| 4786 | DeferredSwapElements* deferred = |
| 4787 | new DeferredSwapElements(object, index1, index2); |
| 4788 | |
| 4789 | // Fetch the map and check if array is in fast case. |
| 4790 | // Check that object doesn't require security checks and |
| 4791 | // has no indexed interceptor. |
| 4792 | __ CompareObjectType(object, tmp1, tmp2, FIRST_JS_OBJECT_TYPE); |
| 4793 | deferred->Branch(lt); |
| 4794 | __ ldrb(tmp2, FieldMemOperand(tmp1, Map::kBitFieldOffset)); |
| 4795 | __ tst(tmp2, Operand(KeyedLoadIC::kSlowCaseBitFieldMask)); |
| 4796 | deferred->Branch(nz); |
| 4797 | |
| 4798 | // Check the object's elements are in fast case. |
| 4799 | __ ldr(tmp1, FieldMemOperand(object, JSObject::kElementsOffset)); |
| 4800 | __ ldr(tmp2, FieldMemOperand(tmp1, HeapObject::kMapOffset)); |
| 4801 | __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| 4802 | __ cmp(tmp2, ip); |
| 4803 | deferred->Branch(ne); |
| 4804 | |
| 4805 | // Smi-tagging is equivalent to multiplying by 2. |
| 4806 | STATIC_ASSERT(kSmiTag == 0); |
| 4807 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4808 | |
| 4809 | // Check that both indices are smis. |
| 4810 | __ mov(tmp2, index1); |
| 4811 | __ orr(tmp2, tmp2, index2); |
| 4812 | __ tst(tmp2, Operand(kSmiTagMask)); |
| 4813 | deferred->Branch(nz); |
| 4814 | |
| 4815 | // Bring the offsets into the fixed array in tmp1 into index1 and |
| 4816 | // index2. |
| 4817 | __ mov(tmp2, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4818 | __ add(index1, tmp2, Operand(index1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 4819 | __ add(index2, tmp2, Operand(index2, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 4820 | |
| 4821 | // Swap elements. |
| 4822 | Register tmp3 = object; |
| 4823 | object = no_reg; |
| 4824 | __ ldr(tmp3, MemOperand(tmp1, index1)); |
| 4825 | __ ldr(tmp2, MemOperand(tmp1, index2)); |
| 4826 | __ str(tmp3, MemOperand(tmp1, index2)); |
| 4827 | __ str(tmp2, MemOperand(tmp1, index1)); |
| 4828 | |
| 4829 | Label done; |
| 4830 | __ InNewSpace(tmp1, tmp2, eq, &done); |
| 4831 | // Possible optimization: do a check that both values are Smis |
| 4832 | // (or them and test against Smi mask.) |
| 4833 | |
| 4834 | __ mov(tmp2, tmp1); |
| 4835 | RecordWriteStub recordWrite1(tmp1, index1, tmp3); |
| 4836 | __ CallStub(&recordWrite1); |
| 4837 | |
| 4838 | RecordWriteStub recordWrite2(tmp2, index2, tmp3); |
| 4839 | __ CallStub(&recordWrite2); |
| 4840 | |
| 4841 | __ bind(&done); |
| 4842 | |
| 4843 | deferred->BindExit(); |
| 4844 | __ LoadRoot(tmp1, Heap::kUndefinedValueRootIndex); |
| 4845 | frame_->EmitPush(tmp1); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 4846 | } |
| 4847 | |
| 4848 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4849 | void CodeGenerator::GenerateCallFunction(ZoneList<Expression*>* args) { |
| 4850 | Comment cmnt(masm_, "[ GenerateCallFunction"); |
| 4851 | |
| 4852 | ASSERT(args->length() >= 2); |
| 4853 | |
| 4854 | int n_args = args->length() - 2; // for receiver and function. |
| 4855 | Load(args->at(0)); // receiver |
| 4856 | for (int i = 0; i < n_args; i++) { |
| 4857 | Load(args->at(i + 1)); |
| 4858 | } |
| 4859 | Load(args->at(n_args + 1)); // function |
| 4860 | frame_->CallJSFunction(n_args); |
| 4861 | frame_->EmitPush(r0); |
| 4862 | } |
| 4863 | |
| 4864 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4865 | void CodeGenerator::GenerateMathSin(ZoneList<Expression*>* args) { |
| 4866 | ASSERT_EQ(args->length(), 1); |
| 4867 | // Load the argument on the stack and jump to the runtime. |
| 4868 | Load(args->at(0)); |
| 4869 | frame_->CallRuntime(Runtime::kMath_sin, 1); |
| 4870 | frame_->EmitPush(r0); |
| 4871 | } |
| 4872 | |
| 4873 | |
| 4874 | void CodeGenerator::GenerateMathCos(ZoneList<Expression*>* args) { |
| 4875 | ASSERT_EQ(args->length(), 1); |
| 4876 | // Load the argument on the stack and jump to the runtime. |
| 4877 | Load(args->at(0)); |
| 4878 | frame_->CallRuntime(Runtime::kMath_cos, 1); |
| 4879 | frame_->EmitPush(r0); |
| 4880 | } |
| 4881 | |
| 4882 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4883 | void CodeGenerator::GenerateObjectEquals(ZoneList<Expression*>* args) { |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4884 | ASSERT(args->length() == 2); |
| 4885 | |
| 4886 | // Load the two objects into registers and perform the comparison. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 4887 | Load(args->at(0)); |
| 4888 | Load(args->at(1)); |
| 4889 | Register lhs = frame_->PopToRegister(); |
| 4890 | Register rhs = frame_->PopToRegister(lhs); |
| 4891 | __ cmp(lhs, rhs); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 4892 | cc_reg_ = eq; |
| 4893 | } |
| 4894 | |
| 4895 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4896 | void CodeGenerator::VisitCallRuntime(CallRuntime* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4897 | #ifdef DEBUG |
| 4898 | int original_height = frame_->height(); |
| 4899 | #endif |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4900 | if (CheckForInlineRuntimeCall(node)) { |
| 4901 | ASSERT((has_cc() && frame_->height() == original_height) || |
| 4902 | (!has_cc() && frame_->height() == original_height + 1)); |
| 4903 | return; |
| 4904 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4905 | |
| 4906 | ZoneList<Expression*>* args = node->arguments(); |
| 4907 | Comment cmnt(masm_, "[ CallRuntime"); |
| 4908 | Runtime::Function* function = node->function(); |
| 4909 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4910 | if (function == NULL) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4911 | // Prepare stack for calling JS runtime function. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4912 | // Push the builtins object found in the current global object. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4913 | Register scratch = VirtualFrame::scratch0(); |
| 4914 | __ ldr(scratch, GlobalObject()); |
| 4915 | Register builtins = frame_->GetTOSRegister(); |
| 4916 | __ ldr(builtins, FieldMemOperand(scratch, GlobalObject::kBuiltinsOffset)); |
| 4917 | frame_->EmitPush(builtins); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4918 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4919 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4920 | // Push the arguments ("left-to-right"). |
| 4921 | int arg_count = args->length(); |
| 4922 | for (int i = 0; i < arg_count; i++) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4923 | Load(args->at(i)); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4924 | } |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4925 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4926 | VirtualFrame::SpilledScope spilled_scope(frame_); |
| 4927 | |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4928 | if (function == NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4929 | // Call the JS runtime function. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4930 | __ mov(r2, Operand(node->name())); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4931 | InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
| 4932 | Handle<Code> stub = ComputeCallInitialize(arg_count, in_loop); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4933 | frame_->CallCodeObject(stub, RelocInfo::CODE_TARGET, arg_count + 1); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 4934 | __ ldr(cp, frame_->Context()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4935 | frame_->EmitPush(r0); |
ager@chromium.org | 41826e7 | 2009-03-30 13:30:57 +0000 | [diff] [blame] | 4936 | } else { |
| 4937 | // Call the C runtime function. |
| 4938 | frame_->CallRuntime(function, arg_count); |
| 4939 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4940 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 4941 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4942 | } |
| 4943 | |
| 4944 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4945 | void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4946 | #ifdef DEBUG |
| 4947 | int original_height = frame_->height(); |
| 4948 | #endif |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 4949 | VirtualFrame::SpilledScope spilled_scope(frame_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4950 | Comment cmnt(masm_, "[ UnaryOperation"); |
| 4951 | |
| 4952 | Token::Value op = node->op(); |
| 4953 | |
| 4954 | if (op == Token::NOT) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4955 | LoadCondition(node->expression(), false_target(), true_target(), true); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 4956 | // LoadCondition may (and usually does) leave a test and branch to |
| 4957 | // be emitted by the caller. In that case, negate the condition. |
| 4958 | if (has_cc()) cc_reg_ = NegateCondition(cc_reg_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4959 | |
| 4960 | } else if (op == Token::DELETE) { |
| 4961 | Property* property = node->expression()->AsProperty(); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4962 | Variable* variable = node->expression()->AsVariableProxy()->AsVariable(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4963 | if (property != NULL) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4964 | Load(property->obj()); |
| 4965 | Load(property->key()); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 4966 | frame_->InvokeBuiltin(Builtins::DELETE, CALL_JS, 2); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4967 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4968 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4969 | } else if (variable != NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4970 | Slot* slot = variable->slot(); |
| 4971 | if (variable->is_global()) { |
| 4972 | LoadGlobal(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4973 | frame_->EmitPush(Operand(variable->name())); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 4974 | frame_->InvokeBuiltin(Builtins::DELETE, CALL_JS, 2); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4975 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4976 | |
| 4977 | } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 4978 | // lookup the context holding the named variable |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4979 | frame_->EmitPush(cp); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4980 | frame_->EmitPush(Operand(variable->name())); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4981 | frame_->CallRuntime(Runtime::kLookupContext, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4982 | // r0: context |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4983 | frame_->EmitPush(r0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4984 | frame_->EmitPush(Operand(variable->name())); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 4985 | frame_->InvokeBuiltin(Builtins::DELETE, CALL_JS, 2); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4986 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4987 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4988 | } else { |
| 4989 | // Default: Result of deleting non-global, not dynamically |
| 4990 | // introduced variables is false. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4991 | frame_->EmitPushRoot(Heap::kFalseValueRootIndex); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4992 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4993 | |
| 4994 | } else { |
| 4995 | // Default: Result of deleting expressions is true. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4996 | Load(node->expression()); // may have side-effects |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 4997 | frame_->Drop(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4998 | frame_->EmitPushRoot(Heap::kTrueValueRootIndex); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4999 | } |
| 5000 | |
| 5001 | } else if (op == Token::TYPEOF) { |
| 5002 | // Special case for loading the typeof expression; see comment on |
| 5003 | // LoadTypeofExpression(). |
| 5004 | LoadTypeofExpression(node->expression()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5005 | frame_->CallRuntime(Runtime::kTypeof, 1); |
| 5006 | frame_->EmitPush(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5007 | |
| 5008 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5009 | bool overwrite = |
| 5010 | (node->expression()->AsBinaryOperation() != NULL && |
| 5011 | node->expression()->AsBinaryOperation()->ResultOverwriteAllowed()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5012 | Load(node->expression()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5013 | switch (op) { |
| 5014 | case Token::NOT: |
| 5015 | case Token::DELETE: |
| 5016 | case Token::TYPEOF: |
| 5017 | UNREACHABLE(); // handled above |
| 5018 | break; |
| 5019 | |
| 5020 | case Token::SUB: { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5021 | VirtualFrame::SpilledScope spilled(frame_); |
| 5022 | frame_->EmitPop(r0); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 5023 | GenericUnaryOpStub stub(Token::SUB, overwrite); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5024 | frame_->CallStub(&stub, 0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5025 | frame_->EmitPush(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5026 | break; |
| 5027 | } |
| 5028 | |
| 5029 | case Token::BIT_NOT: { |
| 5030 | // smi check |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5031 | VirtualFrame::SpilledScope spilled(frame_); |
| 5032 | frame_->EmitPop(r0); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5033 | JumpTarget smi_label; |
| 5034 | JumpTarget continue_label; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5035 | __ tst(r0, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5036 | smi_label.Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5037 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5038 | GenericUnaryOpStub stub(Token::BIT_NOT, overwrite); |
| 5039 | frame_->CallStub(&stub, 0); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5040 | continue_label.Jump(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5041 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5042 | smi_label.Bind(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5043 | __ mvn(r0, Operand(r0)); |
| 5044 | __ bic(r0, r0, Operand(kSmiTagMask)); // bit-clear inverted smi-tag |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5045 | continue_label.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5046 | frame_->EmitPush(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5047 | break; |
| 5048 | } |
| 5049 | |
| 5050 | case Token::VOID: |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5051 | frame_->Drop(); |
| 5052 | frame_->EmitPushRoot(Heap::kUndefinedValueRootIndex); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5053 | break; |
| 5054 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5055 | case Token::ADD: { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5056 | VirtualFrame::SpilledScope spilled(frame_); |
| 5057 | frame_->EmitPop(r0); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5058 | // Smi check. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5059 | JumpTarget continue_label; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5060 | __ tst(r0, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5061 | continue_label.Branch(eq); |
| 5062 | frame_->EmitPush(r0); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 5063 | frame_->InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS, 1); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5064 | continue_label.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5065 | frame_->EmitPush(r0); // r0 has result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5066 | break; |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 5067 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5068 | default: |
| 5069 | UNREACHABLE(); |
| 5070 | } |
| 5071 | } |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5072 | ASSERT(!has_valid_frame() || |
| 5073 | (has_cc() && frame_->height() == original_height) || |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5074 | (!has_cc() && frame_->height() == original_height + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5075 | } |
| 5076 | |
| 5077 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5078 | void CodeGenerator::VisitCountOperation(CountOperation* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5079 | #ifdef DEBUG |
| 5080 | int original_height = frame_->height(); |
| 5081 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5082 | Comment cmnt(masm_, "[ CountOperation"); |
| 5083 | |
| 5084 | bool is_postfix = node->is_postfix(); |
| 5085 | bool is_increment = node->op() == Token::INC; |
| 5086 | |
| 5087 | Variable* var = node->expression()->AsVariableProxy()->AsVariable(); |
| 5088 | bool is_const = (var != NULL && var->mode() == Variable::CONST); |
| 5089 | |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5090 | if (is_postfix) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5091 | frame_->EmitPush(Operand(Smi::FromInt(0))); |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5092 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5093 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5094 | // A constant reference is not saved to, so a constant reference is not a |
| 5095 | // compound assignment reference. |
| 5096 | { Reference target(this, node->expression(), !is_const); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5097 | if (target.is_illegal()) { |
| 5098 | // Spoof the virtual frame to have the expected height (one higher |
| 5099 | // than on entry). |
| 5100 | if (!is_postfix) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5101 | frame_->EmitPush(Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5102 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5103 | ASSERT_EQ(original_height + 1, frame_->height()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5104 | return; |
| 5105 | } |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5106 | // This pushes 0, 1 or 2 words on the object to be used later when updating |
| 5107 | // the target. It also pushes the current value of the target. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5108 | target.GetValue(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5109 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5110 | JumpTarget slow; |
| 5111 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5112 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5113 | // Check for smi operand. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5114 | Register value = frame_->PopToRegister(); |
| 5115 | __ tst(value, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5116 | slow.Branch(ne); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5117 | |
| 5118 | // Postfix: Store the old value as the result. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5119 | if (is_postfix) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5120 | frame_->SetElementAt(value, target.size()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5121 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5122 | |
| 5123 | // Perform optimistic increment/decrement. |
| 5124 | if (is_increment) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5125 | __ add(value, value, Operand(Smi::FromInt(1)), SetCC); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5126 | } else { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5127 | __ sub(value, value, Operand(Smi::FromInt(1)), SetCC); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5128 | } |
| 5129 | |
| 5130 | // If the increment/decrement didn't overflow, we're done. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5131 | exit.Branch(vc); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5132 | |
| 5133 | // Revert optimistic increment/decrement. |
| 5134 | if (is_increment) { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5135 | __ sub(value, value, Operand(Smi::FromInt(1))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5136 | } else { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5137 | __ add(value, value, Operand(Smi::FromInt(1))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5138 | } |
| 5139 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5140 | // Slow case: Convert to number. At this point the |
| 5141 | // value to be incremented is in the value register.. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5142 | slow.Bind(); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5143 | |
| 5144 | // Convert the operand to a number. |
| 5145 | frame_->EmitPush(value); |
| 5146 | |
kasperl@chromium.org | 8ccb0be | 2009-04-07 07:21:39 +0000 | [diff] [blame] | 5147 | { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5148 | VirtualFrame::SpilledScope spilled(frame_); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 5149 | frame_->InvokeBuiltin(Builtins::TO_NUMBER, CALL_JS, 1); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5150 | |
| 5151 | if (is_postfix) { |
| 5152 | // Postfix: store to result (on the stack). |
| 5153 | __ str(r0, frame_->ElementAt(target.size())); |
| 5154 | } |
| 5155 | |
| 5156 | // Compute the new value. |
| 5157 | frame_->EmitPush(r0); |
| 5158 | frame_->EmitPush(Operand(Smi::FromInt(1))); |
| 5159 | if (is_increment) { |
| 5160 | frame_->CallRuntime(Runtime::kNumberAdd, 2); |
| 5161 | } else { |
| 5162 | frame_->CallRuntime(Runtime::kNumberSub, 2); |
| 5163 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5164 | } |
| 5165 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5166 | __ Move(value, r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5167 | // Store the new value in the target if not const. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5168 | // At this point the answer is in the value register. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5169 | exit.Bind(); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5170 | frame_->EmitPush(value); |
| 5171 | // Set the target with the result, leaving the result on |
| 5172 | // top of the stack. Removes the target from the stack if |
| 5173 | // it has a non-zero size. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5174 | if (!is_const) target.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5175 | } |
| 5176 | |
| 5177 | // Postfix: Discard the new value and use the old. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5178 | if (is_postfix) frame_->Pop(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5179 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5180 | } |
| 5181 | |
| 5182 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5183 | void CodeGenerator::GenerateLogicalBooleanOperation(BinaryOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5184 | // According to ECMA-262 section 11.11, page 58, the binary logical |
| 5185 | // operators must yield the result of one of the two expressions |
| 5186 | // before any ToBoolean() conversions. This means that the value |
| 5187 | // produced by a && or || operator is not necessarily a boolean. |
| 5188 | |
| 5189 | // NOTE: If the left hand side produces a materialized value (not in |
| 5190 | // the CC register), we force the right hand side to do the |
| 5191 | // same. This is necessary because we may have to branch to the exit |
| 5192 | // after evaluating the left hand side (due to the shortcut |
| 5193 | // semantics), but the compiler must (statically) know if the result |
| 5194 | // of compiling the binary operation is materialized or not. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5195 | VirtualFrame::SpilledScope spilled_scope(frame_); |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5196 | if (node->op() == Token::AND) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5197 | JumpTarget is_true; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5198 | LoadCondition(node->left(), &is_true, false_target(), false); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5199 | if (has_valid_frame() && !has_cc()) { |
| 5200 | // The left-hand side result is on top of the virtual frame. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5201 | JumpTarget pop_and_continue; |
| 5202 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5203 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5204 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5205 | // Avoid popping the result if it converts to 'false' using the |
| 5206 | // standard ToBoolean() conversion as described in ECMA-262, |
| 5207 | // section 9.2, page 30. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5208 | ToBoolean(&pop_and_continue, &exit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5209 | Branch(false, &exit); |
| 5210 | |
| 5211 | // Pop the result of evaluating the first part. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5212 | pop_and_continue.Bind(); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5213 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5214 | |
| 5215 | // Evaluate right side expression. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5216 | is_true.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5217 | Load(node->right()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5218 | |
| 5219 | // Exit (always with a materialized value). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5220 | exit.Bind(); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5221 | } else if (has_cc() || is_true.is_linked()) { |
| 5222 | // The left-hand side is either (a) partially compiled to |
| 5223 | // control flow with a final branch left to emit or (b) fully |
| 5224 | // compiled to control flow and possibly true. |
| 5225 | if (has_cc()) { |
| 5226 | Branch(false, false_target()); |
| 5227 | } |
| 5228 | is_true.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5229 | LoadCondition(node->right(), true_target(), false_target(), false); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5230 | } else { |
| 5231 | // Nothing to do. |
| 5232 | ASSERT(!has_valid_frame() && !has_cc() && !is_true.is_linked()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5233 | } |
| 5234 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5235 | } else { |
| 5236 | ASSERT(node->op() == Token::OR); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5237 | JumpTarget is_false; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5238 | LoadCondition(node->left(), true_target(), &is_false, false); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5239 | if (has_valid_frame() && !has_cc()) { |
| 5240 | // The left-hand side result is on top of the virtual frame. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 5241 | JumpTarget pop_and_continue; |
| 5242 | JumpTarget exit; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5243 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5244 | frame_->Dup(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5245 | // Avoid popping the result if it converts to 'true' using the |
| 5246 | // standard ToBoolean() conversion as described in ECMA-262, |
| 5247 | // section 9.2, page 30. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5248 | ToBoolean(&exit, &pop_and_continue); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5249 | Branch(true, &exit); |
| 5250 | |
| 5251 | // Pop the result of evaluating the first part. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5252 | pop_and_continue.Bind(); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5253 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5254 | |
| 5255 | // Evaluate right side expression. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5256 | is_false.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5257 | Load(node->right()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5258 | |
| 5259 | // Exit (always with a materialized value). |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5260 | exit.Bind(); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5261 | } else if (has_cc() || is_false.is_linked()) { |
| 5262 | // The left-hand side is either (a) partially compiled to |
| 5263 | // control flow with a final branch left to emit or (b) fully |
| 5264 | // compiled to control flow and possibly false. |
| 5265 | if (has_cc()) { |
| 5266 | Branch(true, true_target()); |
| 5267 | } |
| 5268 | is_false.Bind(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5269 | LoadCondition(node->right(), true_target(), false_target(), false); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5270 | } else { |
| 5271 | // Nothing to do. |
| 5272 | ASSERT(!has_valid_frame() && !has_cc() && !is_false.is_linked()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5273 | } |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5274 | } |
| 5275 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5276 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5277 | |
| 5278 | void CodeGenerator::VisitBinaryOperation(BinaryOperation* node) { |
| 5279 | #ifdef DEBUG |
| 5280 | int original_height = frame_->height(); |
| 5281 | #endif |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 5282 | Comment cmnt(masm_, "[ BinaryOperation"); |
| 5283 | |
| 5284 | if (node->op() == Token::AND || node->op() == Token::OR) { |
| 5285 | GenerateLogicalBooleanOperation(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5286 | } else { |
| 5287 | // Optimize for the case where (at least) one of the expressions |
| 5288 | // is a literal small integer. |
| 5289 | Literal* lliteral = node->left()->AsLiteral(); |
| 5290 | Literal* rliteral = node->right()->AsLiteral(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 5291 | // NOTE: The code below assumes that the slow cases (calls to runtime) |
| 5292 | // never return a constant/immutable object. |
| 5293 | bool overwrite_left = |
| 5294 | (node->left()->AsBinaryOperation() != NULL && |
| 5295 | node->left()->AsBinaryOperation()->ResultOverwriteAllowed()); |
| 5296 | bool overwrite_right = |
| 5297 | (node->right()->AsBinaryOperation() != NULL && |
| 5298 | node->right()->AsBinaryOperation()->ResultOverwriteAllowed()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5299 | |
| 5300 | if (rliteral != NULL && rliteral->handle()->IsSmi()) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5301 | VirtualFrame::RegisterAllocationScope scope(this); |
| 5302 | Load(node->left()); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 5303 | SmiOperation(node->op(), |
| 5304 | rliteral->handle(), |
| 5305 | false, |
| 5306 | overwrite_right ? OVERWRITE_RIGHT : NO_OVERWRITE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5307 | } else if (lliteral != NULL && lliteral->handle()->IsSmi()) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5308 | VirtualFrame::RegisterAllocationScope scope(this); |
| 5309 | Load(node->right()); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 5310 | SmiOperation(node->op(), |
| 5311 | lliteral->handle(), |
| 5312 | true, |
| 5313 | overwrite_left ? OVERWRITE_LEFT : NO_OVERWRITE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5314 | } else { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5315 | VirtualFrame::RegisterAllocationScope scope(this); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 5316 | OverwriteMode overwrite_mode = NO_OVERWRITE; |
| 5317 | if (overwrite_left) { |
| 5318 | overwrite_mode = OVERWRITE_LEFT; |
| 5319 | } else if (overwrite_right) { |
| 5320 | overwrite_mode = OVERWRITE_RIGHT; |
| 5321 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5322 | Load(node->left()); |
| 5323 | Load(node->right()); |
| 5324 | VirtualFrameBinaryOperation(node->op(), overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5325 | } |
| 5326 | } |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 5327 | ASSERT(!has_valid_frame() || |
| 5328 | (has_cc() && frame_->height() == original_height) || |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5329 | (!has_cc() && frame_->height() == original_height + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5330 | } |
| 5331 | |
| 5332 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5333 | void CodeGenerator::VisitThisFunction(ThisFunction* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5334 | #ifdef DEBUG |
| 5335 | int original_height = frame_->height(); |
| 5336 | #endif |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 5337 | frame_->EmitPush(MemOperand(frame_->Function())); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5338 | ASSERT_EQ(original_height + 1, frame_->height()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5339 | } |
| 5340 | |
| 5341 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5342 | void CodeGenerator::VisitCompareOperation(CompareOperation* node) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5343 | #ifdef DEBUG |
| 5344 | int original_height = frame_->height(); |
| 5345 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5346 | Comment cmnt(masm_, "[ CompareOperation"); |
| 5347 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5348 | VirtualFrame::RegisterAllocationScope nonspilled_scope(this); |
| 5349 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5350 | // Get the expressions from the node. |
| 5351 | Expression* left = node->left(); |
| 5352 | Expression* right = node->right(); |
| 5353 | Token::Value op = node->op(); |
| 5354 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5355 | // To make null checks efficient, we check if either left or right is the |
| 5356 | // literal 'null'. If so, we optimize the code by inlining a null check |
| 5357 | // instead of calling the (very) general runtime routine for checking |
| 5358 | // equality. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5359 | if (op == Token::EQ || op == Token::EQ_STRICT) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5360 | bool left_is_null = |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5361 | left->AsLiteral() != NULL && left->AsLiteral()->IsNull(); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5362 | bool right_is_null = |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5363 | right->AsLiteral() != NULL && right->AsLiteral()->IsNull(); |
| 5364 | // The 'null' value can only be equal to 'null' or 'undefined'. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5365 | if (left_is_null || right_is_null) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5366 | Load(left_is_null ? right : left); |
| 5367 | Register tos = frame_->PopToRegister(); |
| 5368 | // JumpTargets can't cope with register allocation yet. |
| 5369 | frame_->SpillAll(); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5370 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5371 | __ cmp(tos, ip); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5372 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5373 | // The 'null' value is only equal to 'undefined' if using non-strict |
| 5374 | // comparisons. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5375 | if (op != Token::EQ_STRICT) { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5376 | true_target()->Branch(eq); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5377 | |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5378 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5379 | __ cmp(tos, Operand(ip)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5380 | true_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5381 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5382 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5383 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5384 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5385 | // It can be an undetectable object. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5386 | __ ldr(tos, FieldMemOperand(tos, HeapObject::kMapOffset)); |
| 5387 | __ ldrb(tos, FieldMemOperand(tos, Map::kBitFieldOffset)); |
| 5388 | __ and_(tos, tos, Operand(1 << Map::kIsUndetectable)); |
| 5389 | __ cmp(tos, Operand(1 << Map::kIsUndetectable)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5390 | } |
| 5391 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5392 | cc_reg_ = eq; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5393 | ASSERT(has_cc() && frame_->height() == original_height); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5394 | return; |
| 5395 | } |
| 5396 | } |
| 5397 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5398 | // To make typeof testing for natives implemented in JavaScript really |
| 5399 | // efficient, we generate special code for expressions of the form: |
| 5400 | // 'typeof <expression> == <string>'. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5401 | UnaryOperation* operation = left->AsUnaryOperation(); |
| 5402 | if ((op == Token::EQ || op == Token::EQ_STRICT) && |
| 5403 | (operation != NULL && operation->op() == Token::TYPEOF) && |
| 5404 | (right->AsLiteral() != NULL && |
| 5405 | right->AsLiteral()->handle()->IsString())) { |
| 5406 | Handle<String> check(String::cast(*right->AsLiteral()->handle())); |
| 5407 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5408 | // Load the operand, move it to a register. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5409 | LoadTypeofExpression(operation->expression()); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5410 | Register tos = frame_->PopToRegister(); |
| 5411 | |
| 5412 | // JumpTargets can't cope with register allocation yet. |
| 5413 | frame_->SpillAll(); |
| 5414 | |
| 5415 | Register scratch = VirtualFrame::scratch0(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5416 | |
| 5417 | if (check->Equals(Heap::number_symbol())) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5418 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5419 | true_target()->Branch(eq); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5420 | __ ldr(tos, FieldMemOperand(tos, HeapObject::kMapOffset)); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5421 | __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5422 | __ cmp(tos, ip); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5423 | cc_reg_ = eq; |
| 5424 | |
| 5425 | } else if (check->Equals(Heap::string_symbol())) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5426 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5427 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5428 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5429 | __ ldr(tos, FieldMemOperand(tos, HeapObject::kMapOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5430 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5431 | // It can be an undetectable string object. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5432 | __ ldrb(scratch, FieldMemOperand(tos, Map::kBitFieldOffset)); |
| 5433 | __ and_(scratch, scratch, Operand(1 << Map::kIsUndetectable)); |
| 5434 | __ cmp(scratch, Operand(1 << Map::kIsUndetectable)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5435 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5436 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5437 | __ ldrb(scratch, FieldMemOperand(tos, Map::kInstanceTypeOffset)); |
| 5438 | __ cmp(scratch, Operand(FIRST_NONSTRING_TYPE)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5439 | cc_reg_ = lt; |
| 5440 | |
| 5441 | } else if (check->Equals(Heap::boolean_symbol())) { |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5442 | __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5443 | __ cmp(tos, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5444 | true_target()->Branch(eq); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5445 | __ LoadRoot(ip, Heap::kFalseValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5446 | __ cmp(tos, ip); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5447 | cc_reg_ = eq; |
| 5448 | |
| 5449 | } else if (check->Equals(Heap::undefined_symbol())) { |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5450 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5451 | __ cmp(tos, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5452 | true_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5453 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5454 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5455 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5456 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5457 | // It can be an undetectable object. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5458 | __ ldr(tos, FieldMemOperand(tos, HeapObject::kMapOffset)); |
| 5459 | __ ldrb(scratch, FieldMemOperand(tos, Map::kBitFieldOffset)); |
| 5460 | __ and_(scratch, scratch, Operand(1 << Map::kIsUndetectable)); |
| 5461 | __ cmp(scratch, Operand(1 << Map::kIsUndetectable)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5462 | |
| 5463 | cc_reg_ = eq; |
| 5464 | |
| 5465 | } else if (check->Equals(Heap::function_symbol())) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5466 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5467 | false_target()->Branch(eq); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5468 | Register map_reg = scratch; |
| 5469 | __ CompareObjectType(tos, map_reg, tos, JS_FUNCTION_TYPE); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5470 | true_target()->Branch(eq); |
| 5471 | // Regular expressions are callable so typeof == 'function'. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5472 | __ CompareInstanceType(map_reg, tos, JS_REGEXP_TYPE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5473 | cc_reg_ = eq; |
| 5474 | |
| 5475 | } else if (check->Equals(Heap::object_symbol())) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5476 | __ tst(tos, Operand(kSmiTagMask)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5477 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5478 | |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 5479 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5480 | __ cmp(tos, ip); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5481 | true_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5482 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5483 | Register map_reg = scratch; |
| 5484 | __ CompareObjectType(tos, map_reg, tos, JS_REGEXP_TYPE); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 5485 | false_target()->Branch(eq); |
| 5486 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5487 | // It can be an undetectable object. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5488 | __ ldrb(tos, FieldMemOperand(map_reg, Map::kBitFieldOffset)); |
| 5489 | __ and_(tos, tos, Operand(1 << Map::kIsUndetectable)); |
| 5490 | __ cmp(tos, Operand(1 << Map::kIsUndetectable)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5491 | false_target()->Branch(eq); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5492 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5493 | __ ldrb(tos, FieldMemOperand(map_reg, Map::kInstanceTypeOffset)); |
| 5494 | __ cmp(tos, Operand(FIRST_JS_OBJECT_TYPE)); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5495 | false_target()->Branch(lt); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5496 | __ cmp(tos, Operand(LAST_JS_OBJECT_TYPE)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5497 | cc_reg_ = le; |
| 5498 | |
| 5499 | } else { |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5500 | // Uncommon case: typeof testing against a string literal that is |
| 5501 | // never returned from the typeof operator. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5502 | false_target()->Jump(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5503 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5504 | ASSERT(!has_valid_frame() || |
| 5505 | (has_cc() && frame_->height() == original_height)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5506 | return; |
| 5507 | } |
| 5508 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5509 | switch (op) { |
| 5510 | case Token::EQ: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5511 | Comparison(eq, left, right, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5512 | break; |
| 5513 | |
| 5514 | case Token::LT: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5515 | Comparison(lt, left, right); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5516 | break; |
| 5517 | |
| 5518 | case Token::GT: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5519 | Comparison(gt, left, right); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5520 | break; |
| 5521 | |
| 5522 | case Token::LTE: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5523 | Comparison(le, left, right); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5524 | break; |
| 5525 | |
| 5526 | case Token::GTE: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5527 | Comparison(ge, left, right); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5528 | break; |
| 5529 | |
| 5530 | case Token::EQ_STRICT: |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 5531 | Comparison(eq, left, right, true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5532 | break; |
| 5533 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5534 | case Token::IN: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5535 | VirtualFrame::SpilledScope scope(frame_); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5536 | Load(left); |
| 5537 | Load(right); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 5538 | frame_->InvokeBuiltin(Builtins::IN, CALL_JS, 2); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 5539 | frame_->EmitPush(r0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5540 | break; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5541 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5542 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5543 | case Token::INSTANCEOF: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 5544 | VirtualFrame::SpilledScope scope(frame_); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5545 | Load(left); |
| 5546 | Load(right); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 5547 | InstanceofStub stub; |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 5548 | frame_->CallStub(&stub, 2); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 5549 | // At this point if instanceof succeeded then r0 == 0. |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 5550 | __ tst(r0, Operand(r0)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5551 | cc_reg_ = eq; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5552 | break; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5553 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5554 | |
| 5555 | default: |
| 5556 | UNREACHABLE(); |
| 5557 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5558 | ASSERT((has_cc() && frame_->height() == original_height) || |
| 5559 | (!has_cc() && frame_->height() == original_height + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5560 | } |
| 5561 | |
| 5562 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5563 | class DeferredReferenceGetNamedValue: public DeferredCode { |
| 5564 | public: |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5565 | explicit DeferredReferenceGetNamedValue(Register receiver, |
| 5566 | Handle<String> name) |
| 5567 | : receiver_(receiver), name_(name) { |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5568 | set_comment("[ DeferredReferenceGetNamedValue"); |
| 5569 | } |
| 5570 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5571 | virtual void Generate(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5572 | |
| 5573 | private: |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5574 | Register receiver_; |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5575 | Handle<String> name_; |
| 5576 | }; |
| 5577 | |
| 5578 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5579 | // Convention for this is that on entry the receiver is in a register that |
| 5580 | // is not used by the stack. On exit the answer is found in that same |
| 5581 | // register and the stack has the same height. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5582 | void DeferredReferenceGetNamedValue::Generate() { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5583 | #ifdef DEBUG |
| 5584 | int expected_height = frame_state()->frame()->height(); |
| 5585 | #endif |
| 5586 | VirtualFrame copied_frame(*frame_state()->frame()); |
| 5587 | copied_frame.SpillAll(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5588 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5589 | Register scratch1 = VirtualFrame::scratch0(); |
| 5590 | Register scratch2 = VirtualFrame::scratch1(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5591 | ASSERT(!receiver_.is(scratch1) && !receiver_.is(scratch2)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5592 | __ DecrementCounter(&Counters::named_load_inline, 1, scratch1, scratch2); |
| 5593 | __ IncrementCounter(&Counters::named_load_inline_miss, 1, scratch1, scratch2); |
| 5594 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5595 | // Ensure receiver in r0 and name in r2 to match load ic calling convention. |
| 5596 | __ Move(r0, receiver_); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5597 | __ mov(r2, Operand(name_)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5598 | |
| 5599 | // The rest of the instructions in the deferred code must be together. |
| 5600 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
| 5601 | Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| 5602 | __ Call(ic, RelocInfo::CODE_TARGET); |
| 5603 | // The call must be followed by a nop(1) instruction to indicate that the |
| 5604 | // in-object has been inlined. |
| 5605 | __ nop(PROPERTY_ACCESS_INLINED); |
| 5606 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5607 | // At this point the answer is in r0. We move it to the expected register |
| 5608 | // if necessary. |
| 5609 | __ Move(receiver_, r0); |
| 5610 | |
| 5611 | // Now go back to the frame that we entered with. This will not overwrite |
| 5612 | // the receiver register since that register was not in use when we came |
| 5613 | // in. The instructions emitted by this merge are skipped over by the |
| 5614 | // inline load patching mechanism when looking for the branch instruction |
| 5615 | // that tells it where the code to patch is. |
| 5616 | copied_frame.MergeTo(frame_state()->frame()); |
| 5617 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5618 | // Block the constant pool for one more instruction after leaving this |
| 5619 | // constant pool block scope to include the branch instruction ending the |
| 5620 | // deferred code. |
| 5621 | __ BlockConstPoolFor(1); |
| 5622 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5623 | ASSERT_EQ(expected_height, frame_state()->frame()->height()); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5624 | } |
| 5625 | |
| 5626 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5627 | class DeferredReferenceGetKeyedValue: public DeferredCode { |
| 5628 | public: |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5629 | DeferredReferenceGetKeyedValue(Register key, Register receiver) |
| 5630 | : key_(key), receiver_(receiver) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5631 | set_comment("[ DeferredReferenceGetKeyedValue"); |
| 5632 | } |
| 5633 | |
| 5634 | virtual void Generate(); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5635 | |
| 5636 | private: |
| 5637 | Register key_; |
| 5638 | Register receiver_; |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5639 | }; |
| 5640 | |
| 5641 | |
| 5642 | void DeferredReferenceGetKeyedValue::Generate() { |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5643 | ASSERT((key_.is(r0) && receiver_.is(r1)) || |
| 5644 | (key_.is(r1) && receiver_.is(r0))); |
| 5645 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5646 | Register scratch1 = VirtualFrame::scratch0(); |
| 5647 | Register scratch2 = VirtualFrame::scratch1(); |
| 5648 | __ DecrementCounter(&Counters::keyed_load_inline, 1, scratch1, scratch2); |
| 5649 | __ IncrementCounter(&Counters::keyed_load_inline_miss, 1, scratch1, scratch2); |
| 5650 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5651 | // Ensure key in r0 and receiver in r1 to match keyed load ic calling |
| 5652 | // convention. |
| 5653 | if (key_.is(r1)) { |
| 5654 | __ Swap(r0, r1, ip); |
| 5655 | } |
| 5656 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5657 | // The rest of the instructions in the deferred code must be together. |
| 5658 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 5659 | // Call keyed load IC. It has the arguments key and receiver in r0 and r1. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5660 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| 5661 | __ Call(ic, RelocInfo::CODE_TARGET); |
| 5662 | // The call must be followed by a nop instruction to indicate that the |
| 5663 | // keyed load has been inlined. |
| 5664 | __ nop(PROPERTY_ACCESS_INLINED); |
| 5665 | |
| 5666 | // Block the constant pool for one more instruction after leaving this |
| 5667 | // constant pool block scope to include the branch instruction ending the |
| 5668 | // deferred code. |
| 5669 | __ BlockConstPoolFor(1); |
| 5670 | } |
| 5671 | } |
| 5672 | |
| 5673 | |
| 5674 | class DeferredReferenceSetKeyedValue: public DeferredCode { |
| 5675 | public: |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5676 | DeferredReferenceSetKeyedValue(Register value, |
| 5677 | Register key, |
| 5678 | Register receiver) |
| 5679 | : value_(value), key_(key), receiver_(receiver) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5680 | set_comment("[ DeferredReferenceSetKeyedValue"); |
| 5681 | } |
| 5682 | |
| 5683 | virtual void Generate(); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5684 | |
| 5685 | private: |
| 5686 | Register value_; |
| 5687 | Register key_; |
| 5688 | Register receiver_; |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5689 | }; |
| 5690 | |
| 5691 | |
| 5692 | void DeferredReferenceSetKeyedValue::Generate() { |
| 5693 | Register scratch1 = VirtualFrame::scratch0(); |
| 5694 | Register scratch2 = VirtualFrame::scratch1(); |
| 5695 | __ DecrementCounter(&Counters::keyed_store_inline, 1, scratch1, scratch2); |
| 5696 | __ IncrementCounter( |
| 5697 | &Counters::keyed_store_inline_miss, 1, scratch1, scratch2); |
| 5698 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5699 | // Ensure value in r0, key in r1 and receiver in r2 to match keyed store ic |
| 5700 | // calling convention. |
| 5701 | if (value_.is(r1)) { |
| 5702 | __ Swap(r0, r1, ip); |
| 5703 | } |
| 5704 | ASSERT(receiver_.is(r2)); |
| 5705 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5706 | // The rest of the instructions in the deferred code must be together. |
| 5707 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5708 | // Call keyed store IC. It has the arguments value, key and receiver in r0, |
| 5709 | // r1 and r2. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5710 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| 5711 | __ Call(ic, RelocInfo::CODE_TARGET); |
| 5712 | // The call must be followed by a nop instruction to indicate that the |
| 5713 | // keyed store has been inlined. |
| 5714 | __ nop(PROPERTY_ACCESS_INLINED); |
| 5715 | |
| 5716 | // Block the constant pool for one more instruction after leaving this |
| 5717 | // constant pool block scope to include the branch instruction ending the |
| 5718 | // deferred code. |
| 5719 | __ BlockConstPoolFor(1); |
| 5720 | } |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5721 | } |
| 5722 | |
| 5723 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5724 | // Consumes the top of stack (the receiver) and pushes the result instead. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5725 | void CodeGenerator::EmitNamedLoad(Handle<String> name, bool is_contextual) { |
| 5726 | if (is_contextual || scope()->is_global_scope() || loop_nesting() == 0) { |
| 5727 | Comment cmnt(masm(), "[ Load from named Property"); |
| 5728 | // Setup the name register and call load IC. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5729 | frame_->CallLoadIC(name, |
| 5730 | is_contextual |
| 5731 | ? RelocInfo::CODE_TARGET_CONTEXT |
| 5732 | : RelocInfo::CODE_TARGET); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5733 | frame_->EmitPush(r0); // Push answer. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5734 | } else { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5735 | // Inline the in-object property case. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5736 | Comment cmnt(masm(), "[ Inlined named property load"); |
| 5737 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5738 | // Counter will be decremented in the deferred code. Placed here to avoid |
| 5739 | // having it in the instruction stream below where patching will occur. |
| 5740 | __ IncrementCounter(&Counters::named_load_inline, 1, |
| 5741 | frame_->scratch0(), frame_->scratch1()); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5742 | |
| 5743 | // The following instructions are the inlined load of an in-object property. |
| 5744 | // Parts of this code is patched, so the exact instructions generated needs |
| 5745 | // to be fixed. Therefore the instruction pool is blocked when generating |
| 5746 | // this code |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5747 | |
| 5748 | // Load the receiver from the stack. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5749 | Register receiver = frame_->PopToRegister(); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5750 | |
| 5751 | DeferredReferenceGetNamedValue* deferred = |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5752 | new DeferredReferenceGetNamedValue(receiver, name); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5753 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5754 | #ifdef DEBUG |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5755 | int kInlinedNamedLoadInstructions = 7; |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5756 | Label check_inlined_codesize; |
| 5757 | masm_->bind(&check_inlined_codesize); |
| 5758 | #endif |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5759 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5760 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5761 | // Check that the receiver is a heap object. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5762 | __ tst(receiver, Operand(kSmiTagMask)); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5763 | deferred->Branch(eq); |
| 5764 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5765 | Register scratch = VirtualFrame::scratch0(); |
| 5766 | Register scratch2 = VirtualFrame::scratch1(); |
| 5767 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5768 | // Check the map. The null map used below is patched by the inline cache |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5769 | // code. Therefore we can't use a LoadRoot call. |
| 5770 | __ ldr(scratch, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 5771 | __ mov(scratch2, Operand(Factory::null_value())); |
| 5772 | __ cmp(scratch, scratch2); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5773 | deferred->Branch(ne); |
| 5774 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5775 | // Initially use an invalid index. The index will be patched by the |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5776 | // inline cache code. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5777 | __ ldr(receiver, MemOperand(receiver, 0)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5778 | |
| 5779 | // Make sure that the expected number of instructions are generated. |
| 5780 | ASSERT_EQ(kInlinedNamedLoadInstructions, |
| 5781 | masm_->InstructionsGeneratedSince(&check_inlined_codesize)); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5782 | } |
| 5783 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5784 | deferred->BindExit(); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5785 | // At this point the receiver register has the result, either from the |
| 5786 | // deferred code or from the inlined code. |
| 5787 | frame_->EmitPush(receiver); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 5788 | } |
| 5789 | } |
| 5790 | |
| 5791 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 5792 | void CodeGenerator::EmitNamedStore(Handle<String> name, bool is_contextual) { |
| 5793 | #ifdef DEBUG |
| 5794 | int expected_height = frame_->height() - (is_contextual ? 1 : 2); |
| 5795 | #endif |
| 5796 | frame_->CallStoreIC(name, is_contextual); |
| 5797 | |
| 5798 | ASSERT_EQ(expected_height, frame_->height()); |
| 5799 | } |
| 5800 | |
| 5801 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5802 | void CodeGenerator::EmitKeyedLoad() { |
| 5803 | if (loop_nesting() == 0) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5804 | Comment cmnt(masm_, "[ Load from keyed property"); |
| 5805 | frame_->CallKeyedLoadIC(); |
| 5806 | } else { |
| 5807 | // Inline the keyed load. |
| 5808 | Comment cmnt(masm_, "[ Inlined load from keyed property"); |
| 5809 | |
| 5810 | // Counter will be decremented in the deferred code. Placed here to avoid |
| 5811 | // having it in the instruction stream below where patching will occur. |
| 5812 | __ IncrementCounter(&Counters::keyed_load_inline, 1, |
| 5813 | frame_->scratch0(), frame_->scratch1()); |
| 5814 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5815 | // Load the key and receiver from the stack. |
| 5816 | Register key = frame_->PopToRegister(); |
| 5817 | Register receiver = frame_->PopToRegister(key); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5818 | VirtualFrame::SpilledScope spilled(frame_); |
| 5819 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5820 | // The deferred code expects key and receiver in registers. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5821 | DeferredReferenceGetKeyedValue* deferred = |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5822 | new DeferredReferenceGetKeyedValue(key, receiver); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5823 | |
| 5824 | // Check that the receiver is a heap object. |
| 5825 | __ tst(receiver, Operand(kSmiTagMask)); |
| 5826 | deferred->Branch(eq); |
| 5827 | |
| 5828 | // The following instructions are the part of the inlined load keyed |
| 5829 | // property code which can be patched. Therefore the exact number of |
| 5830 | // instructions generated need to be fixed, so the constant pool is blocked |
| 5831 | // while generating this code. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5832 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
| 5833 | Register scratch1 = VirtualFrame::scratch0(); |
| 5834 | Register scratch2 = VirtualFrame::scratch1(); |
| 5835 | // Check the map. The null map used below is patched by the inline cache |
| 5836 | // code. |
| 5837 | __ ldr(scratch1, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5838 | #ifdef DEBUG |
| 5839 | Label check_inlined_codesize; |
| 5840 | masm_->bind(&check_inlined_codesize); |
| 5841 | #endif |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5842 | __ mov(scratch2, Operand(Factory::null_value())); |
| 5843 | __ cmp(scratch1, scratch2); |
| 5844 | deferred->Branch(ne); |
| 5845 | |
| 5846 | // Check that the key is a smi. |
| 5847 | __ tst(key, Operand(kSmiTagMask)); |
| 5848 | deferred->Branch(ne); |
| 5849 | |
| 5850 | // Get the elements array from the receiver and check that it |
| 5851 | // is not a dictionary. |
| 5852 | __ ldr(scratch1, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 5853 | __ ldr(scratch2, FieldMemOperand(scratch1, JSObject::kMapOffset)); |
| 5854 | __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| 5855 | __ cmp(scratch2, ip); |
| 5856 | deferred->Branch(ne); |
| 5857 | |
| 5858 | // Check that key is within bounds. Use unsigned comparison to handle |
| 5859 | // negative keys. |
| 5860 | __ ldr(scratch2, FieldMemOperand(scratch1, FixedArray::kLengthOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 5861 | __ cmp(scratch2, key); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5862 | deferred->Branch(ls); // Unsigned less equal. |
| 5863 | |
| 5864 | // Load and check that the result is not the hole (key is a smi). |
| 5865 | __ LoadRoot(scratch2, Heap::kTheHoleValueRootIndex); |
| 5866 | __ add(scratch1, |
| 5867 | scratch1, |
| 5868 | Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5869 | __ ldr(scratch1, |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5870 | MemOperand(scratch1, key, LSL, |
| 5871 | kPointerSizeLog2 - (kSmiTagSize + kSmiShiftSize))); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5872 | __ cmp(scratch1, scratch2); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5873 | deferred->Branch(eq); |
| 5874 | |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 5875 | __ mov(r0, scratch1); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5876 | // Make sure that the expected number of instructions are generated. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5877 | ASSERT_EQ(kInlinedKeyedLoadInstructionsAfterPatch, |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5878 | masm_->InstructionsGeneratedSince(&check_inlined_codesize)); |
| 5879 | } |
| 5880 | |
| 5881 | deferred->BindExit(); |
| 5882 | } |
| 5883 | } |
| 5884 | |
| 5885 | |
| 5886 | void CodeGenerator::EmitKeyedStore(StaticType* key_type) { |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5887 | // Generate inlined version of the keyed store if the code is in a loop |
| 5888 | // and the key is likely to be a smi. |
| 5889 | if (loop_nesting() > 0 && key_type->IsLikelySmi()) { |
| 5890 | // Inline the keyed store. |
| 5891 | Comment cmnt(masm_, "[ Inlined store to keyed property"); |
| 5892 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5893 | Register scratch1 = VirtualFrame::scratch0(); |
| 5894 | Register scratch2 = VirtualFrame::scratch1(); |
| 5895 | Register scratch3 = r3; |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5896 | |
| 5897 | // Counter will be decremented in the deferred code. Placed here to avoid |
| 5898 | // having it in the instruction stream below where patching will occur. |
| 5899 | __ IncrementCounter(&Counters::keyed_store_inline, 1, |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5900 | scratch1, scratch2); |
| 5901 | |
| 5902 | // Load the value, key and receiver from the stack. |
| 5903 | Register value = frame_->PopToRegister(); |
| 5904 | Register key = frame_->PopToRegister(value); |
| 5905 | Register receiver = r2; |
| 5906 | frame_->EmitPop(receiver); |
| 5907 | VirtualFrame::SpilledScope spilled(frame_); |
| 5908 | |
| 5909 | // The deferred code expects value, key and receiver in registers. |
| 5910 | DeferredReferenceSetKeyedValue* deferred = |
| 5911 | new DeferredReferenceSetKeyedValue(value, key, receiver); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5912 | |
| 5913 | // Check that the value is a smi. As this inlined code does not set the |
| 5914 | // write barrier it is only possible to store smi values. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5915 | __ tst(value, Operand(kSmiTagMask)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5916 | deferred->Branch(ne); |
| 5917 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5918 | // Check that the key is a smi. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5919 | __ tst(key, Operand(kSmiTagMask)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5920 | deferred->Branch(ne); |
| 5921 | |
| 5922 | // Check that the receiver is a heap object. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5923 | __ tst(receiver, Operand(kSmiTagMask)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5924 | deferred->Branch(eq); |
| 5925 | |
| 5926 | // Check that the receiver is a JSArray. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5927 | __ CompareObjectType(receiver, scratch1, scratch1, JS_ARRAY_TYPE); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5928 | deferred->Branch(ne); |
| 5929 | |
| 5930 | // Check that the key is within bounds. Both the key and the length of |
| 5931 | // the JSArray are smis. Use unsigned comparison to handle negative keys. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5932 | __ ldr(scratch1, FieldMemOperand(receiver, JSArray::kLengthOffset)); |
| 5933 | __ cmp(scratch1, key); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5934 | deferred->Branch(ls); // Unsigned less equal. |
| 5935 | |
| 5936 | // The following instructions are the part of the inlined store keyed |
| 5937 | // property code which can be patched. Therefore the exact number of |
| 5938 | // instructions generated need to be fixed, so the constant pool is blocked |
| 5939 | // while generating this code. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5940 | { Assembler::BlockConstPoolScope block_const_pool(masm_); |
| 5941 | // Get the elements array from the receiver and check that it |
| 5942 | // is not a dictionary. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5943 | __ ldr(scratch1, FieldMemOperand(receiver, JSObject::kElementsOffset)); |
| 5944 | __ ldr(scratch2, FieldMemOperand(scratch1, JSObject::kMapOffset)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5945 | // Read the fixed array map from the constant pool (not from the root |
| 5946 | // array) so that the value can be patched. When debugging, we patch this |
| 5947 | // comparison to always fail so that we will hit the IC call in the |
| 5948 | // deferred code which will allow the debugger to break for fast case |
| 5949 | // stores. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5950 | #ifdef DEBUG |
| 5951 | Label check_inlined_codesize; |
| 5952 | masm_->bind(&check_inlined_codesize); |
| 5953 | #endif |
| 5954 | __ mov(scratch3, Operand(Factory::fixed_array_map())); |
| 5955 | __ cmp(scratch2, scratch3); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5956 | deferred->Branch(ne); |
| 5957 | |
| 5958 | // Store the value. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5959 | __ add(scratch1, scratch1, |
| 5960 | Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 5961 | __ str(value, |
| 5962 | MemOperand(scratch1, key, LSL, |
| 5963 | kPointerSizeLog2 - (kSmiTagSize + kSmiShiftSize))); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5964 | |
| 5965 | // Make sure that the expected number of instructions are generated. |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5966 | ASSERT_EQ(kInlinedKeyedStoreInstructionsAfterPatch, |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 5967 | masm_->InstructionsGeneratedSince(&check_inlined_codesize)); |
| 5968 | } |
| 5969 | |
| 5970 | deferred->BindExit(); |
| 5971 | } else { |
| 5972 | frame()->CallKeyedStoreIC(); |
| 5973 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 5974 | } |
| 5975 | |
| 5976 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 5977 | #ifdef DEBUG |
| 5978 | bool CodeGenerator::HasValidEntryRegisters() { return true; } |
| 5979 | #endif |
| 5980 | |
| 5981 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5982 | #undef __ |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 5983 | #define __ ACCESS_MASM(masm) |
| 5984 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5985 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5986 | Handle<String> Reference::GetName() { |
| 5987 | ASSERT(type_ == NAMED); |
| 5988 | Property* property = expression_->AsProperty(); |
| 5989 | if (property == NULL) { |
| 5990 | // Global variable reference treated as a named property reference. |
| 5991 | VariableProxy* proxy = expression_->AsVariableProxy(); |
| 5992 | ASSERT(proxy->AsVariable() != NULL); |
| 5993 | ASSERT(proxy->AsVariable()->is_global()); |
| 5994 | return proxy->name(); |
| 5995 | } else { |
| 5996 | Literal* raw_name = property->key()->AsLiteral(); |
| 5997 | ASSERT(raw_name != NULL); |
| 5998 | return Handle<String>(String::cast(*raw_name->handle())); |
| 5999 | } |
| 6000 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6001 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6002 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6003 | void Reference::DupIfPersist() { |
| 6004 | if (persist_after_get_) { |
| 6005 | switch (type_) { |
| 6006 | case KEYED: |
| 6007 | cgen_->frame()->Dup2(); |
| 6008 | break; |
| 6009 | case NAMED: |
| 6010 | cgen_->frame()->Dup(); |
| 6011 | // Fall through. |
| 6012 | case UNLOADED: |
| 6013 | case ILLEGAL: |
| 6014 | case SLOT: |
| 6015 | // Do nothing. |
| 6016 | ; |
| 6017 | } |
| 6018 | } else { |
| 6019 | set_unloaded(); |
| 6020 | } |
| 6021 | } |
| 6022 | |
| 6023 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6024 | void Reference::GetValue() { |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 6025 | ASSERT(cgen_->HasValidEntryRegisters()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6026 | ASSERT(!is_illegal()); |
| 6027 | ASSERT(!cgen_->has_cc()); |
| 6028 | MacroAssembler* masm = cgen_->masm(); |
| 6029 | Property* property = expression_->AsProperty(); |
| 6030 | if (property != NULL) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6031 | cgen_->CodeForSourcePosition(property->position()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6032 | } |
| 6033 | |
| 6034 | switch (type_) { |
| 6035 | case SLOT: { |
| 6036 | Comment cmnt(masm, "[ Load from Slot"); |
| 6037 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 6038 | ASSERT(slot != NULL); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6039 | DupIfPersist(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6040 | cgen_->LoadFromSlotCheckForArguments(slot, NOT_INSIDE_TYPEOF); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6041 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6042 | } |
| 6043 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6044 | case NAMED: { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6045 | Variable* var = expression_->AsVariableProxy()->AsVariable(); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6046 | bool is_global = var != NULL; |
| 6047 | ASSERT(!is_global || var->is_global()); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6048 | Handle<String> name = GetName(); |
| 6049 | DupIfPersist(); |
| 6050 | cgen_->EmitNamedLoad(name, is_global); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6051 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6052 | } |
| 6053 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6054 | case KEYED: { |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6055 | ASSERT(property != NULL); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6056 | DupIfPersist(); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6057 | cgen_->EmitKeyedLoad(); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6058 | cgen_->frame()->EmitPush(r0); |
| 6059 | break; |
| 6060 | } |
| 6061 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6062 | default: |
| 6063 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6064 | } |
| 6065 | } |
| 6066 | |
| 6067 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6068 | void Reference::SetValue(InitState init_state) { |
| 6069 | ASSERT(!is_illegal()); |
| 6070 | ASSERT(!cgen_->has_cc()); |
| 6071 | MacroAssembler* masm = cgen_->masm(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 6072 | VirtualFrame* frame = cgen_->frame(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6073 | Property* property = expression_->AsProperty(); |
| 6074 | if (property != NULL) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6075 | cgen_->CodeForSourcePosition(property->position()); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6076 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6077 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6078 | switch (type_) { |
| 6079 | case SLOT: { |
| 6080 | Comment cmnt(masm, "[ Store to Slot"); |
| 6081 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6082 | cgen_->StoreToSlot(slot, init_state); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 6083 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6084 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6085 | } |
| 6086 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6087 | case NAMED: { |
| 6088 | Comment cmnt(masm, "[ Store to named Property"); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 6089 | cgen_->EmitNamedStore(GetName(), false); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 6090 | frame->EmitPush(r0); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6091 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6092 | break; |
| 6093 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6094 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6095 | case KEYED: { |
| 6096 | Comment cmnt(masm, "[ Store to keyed Property"); |
| 6097 | Property* property = expression_->AsProperty(); |
| 6098 | ASSERT(property != NULL); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 6099 | cgen_->CodeForSourcePosition(property->position()); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6100 | cgen_->EmitKeyedStore(property->key()->type()); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 6101 | frame->EmitPush(r0); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 6102 | set_unloaded(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6103 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6104 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 6105 | |
| 6106 | default: |
| 6107 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 6108 | } |
| 6109 | } |
| 6110 | |
| 6111 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6112 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6113 | // Create a new closure from the given function info in new |
| 6114 | // space. Set the context to the current context in cp. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6115 | Label gc; |
| 6116 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6117 | // Pop the function info from the stack. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6118 | __ pop(r3); |
| 6119 | |
| 6120 | // Attempt to allocate new JSFunction in new space. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6121 | __ AllocateInNewSpace(JSFunction::kSize, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6122 | r0, |
| 6123 | r1, |
| 6124 | r2, |
| 6125 | &gc, |
| 6126 | TAG_OBJECT); |
| 6127 | |
| 6128 | // Compute the function map in the current global context and set that |
| 6129 | // as the map of the allocated object. |
| 6130 | __ ldr(r2, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 6131 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalContextOffset)); |
| 6132 | __ ldr(r2, MemOperand(r2, Context::SlotOffset(Context::FUNCTION_MAP_INDEX))); |
| 6133 | __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 6134 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6135 | // Initialize the rest of the function. We don't have to update the |
| 6136 | // write barrier because the allocated object is in new space. |
| 6137 | __ LoadRoot(r1, Heap::kEmptyFixedArrayRootIndex); |
| 6138 | __ LoadRoot(r2, Heap::kTheHoleValueRootIndex); |
| 6139 | __ str(r1, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 6140 | __ str(r1, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 6141 | __ str(r2, FieldMemOperand(r0, JSFunction::kPrototypeOrInitialMapOffset)); |
| 6142 | __ str(r3, FieldMemOperand(r0, JSFunction::kSharedFunctionInfoOffset)); |
| 6143 | __ str(cp, FieldMemOperand(r0, JSFunction::kContextOffset)); |
| 6144 | __ str(r1, FieldMemOperand(r0, JSFunction::kLiteralsOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6145 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6146 | // Return result. The argument function info has been popped already. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6147 | __ Ret(); |
| 6148 | |
| 6149 | // Create a new closure through the slower runtime call. |
| 6150 | __ bind(&gc); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6151 | __ Push(cp, r3); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6152 | __ TailCallRuntime(Runtime::kNewClosure, 2, 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6153 | } |
| 6154 | |
| 6155 | |
| 6156 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
| 6157 | // Try to allocate the context in new space. |
| 6158 | Label gc; |
| 6159 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 6160 | |
| 6161 | // Attempt to allocate the context in new space. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6162 | __ AllocateInNewSpace(FixedArray::SizeFor(length), |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6163 | r0, |
| 6164 | r1, |
| 6165 | r2, |
| 6166 | &gc, |
| 6167 | TAG_OBJECT); |
| 6168 | |
| 6169 | // Load the function from the stack. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6170 | __ ldr(r3, MemOperand(sp, 0)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6171 | |
| 6172 | // Setup the object header. |
| 6173 | __ LoadRoot(r2, Heap::kContextMapRootIndex); |
| 6174 | __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6175 | __ mov(r2, Operand(Smi::FromInt(length))); |
| 6176 | __ str(r2, FieldMemOperand(r0, FixedArray::kLengthOffset)); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6177 | |
| 6178 | // Setup the fixed slots. |
| 6179 | __ mov(r1, Operand(Smi::FromInt(0))); |
| 6180 | __ str(r3, MemOperand(r0, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 6181 | __ str(r0, MemOperand(r0, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 6182 | __ str(r1, MemOperand(r0, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
| 6183 | __ str(r1, MemOperand(r0, Context::SlotOffset(Context::EXTENSION_INDEX))); |
| 6184 | |
| 6185 | // Copy the global object from the surrounding context. |
| 6186 | __ ldr(r1, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 6187 | __ str(r1, MemOperand(r0, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 6188 | |
| 6189 | // Initialize the rest of the slots to undefined. |
| 6190 | __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
| 6191 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 6192 | __ str(r1, MemOperand(r0, Context::SlotOffset(i))); |
| 6193 | } |
| 6194 | |
| 6195 | // Remove the on-stack argument and return. |
| 6196 | __ mov(cp, r0); |
| 6197 | __ pop(); |
| 6198 | __ Ret(); |
| 6199 | |
| 6200 | // Need to collect. Call into runtime system. |
| 6201 | __ bind(&gc); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6202 | __ TailCallRuntime(Runtime::kNewContext, 1, 1); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6203 | } |
| 6204 | |
| 6205 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6206 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
| 6207 | // Stack layout on entry: |
| 6208 | // |
| 6209 | // [sp]: constant elements. |
| 6210 | // [sp + kPointerSize]: literal index. |
| 6211 | // [sp + (2 * kPointerSize)]: literals array. |
| 6212 | |
| 6213 | // All sizes here are multiples of kPointerSize. |
| 6214 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 6215 | int size = JSArray::kSize + elements_size; |
| 6216 | |
| 6217 | // Load boilerplate object into r3 and check if we need to create a |
| 6218 | // boilerplate. |
| 6219 | Label slow_case; |
| 6220 | __ ldr(r3, MemOperand(sp, 2 * kPointerSize)); |
| 6221 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| 6222 | __ add(r3, r3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 6223 | __ ldr(r3, MemOperand(r3, r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 6224 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 6225 | __ cmp(r3, ip); |
| 6226 | __ b(eq, &slow_case); |
| 6227 | |
| 6228 | // Allocate both the JS array and the elements array in one big |
| 6229 | // allocation. This avoids multiple limit checks. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 6230 | __ AllocateInNewSpace(size, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6231 | r0, |
| 6232 | r1, |
| 6233 | r2, |
| 6234 | &slow_case, |
| 6235 | TAG_OBJECT); |
| 6236 | |
| 6237 | // Copy the JS array part. |
| 6238 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 6239 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 6240 | __ ldr(r1, FieldMemOperand(r3, i)); |
| 6241 | __ str(r1, FieldMemOperand(r0, i)); |
| 6242 | } |
| 6243 | } |
| 6244 | |
| 6245 | if (length_ > 0) { |
| 6246 | // Get hold of the elements array of the boilerplate and setup the |
| 6247 | // elements pointer in the resulting object. |
| 6248 | __ ldr(r3, FieldMemOperand(r3, JSArray::kElementsOffset)); |
| 6249 | __ add(r2, r0, Operand(JSArray::kSize)); |
| 6250 | __ str(r2, FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 6251 | |
| 6252 | // Copy the elements array. |
| 6253 | for (int i = 0; i < elements_size; i += kPointerSize) { |
| 6254 | __ ldr(r1, FieldMemOperand(r3, i)); |
| 6255 | __ str(r1, FieldMemOperand(r2, i)); |
| 6256 | } |
| 6257 | } |
| 6258 | |
| 6259 | // Return and remove the on-stack parameters. |
| 6260 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 6261 | __ Ret(); |
| 6262 | |
| 6263 | __ bind(&slow_case); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 6264 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 6265 | } |
| 6266 | |
| 6267 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6268 | // Takes a Smi and converts to an IEEE 64 bit floating point value in two |
| 6269 | // registers. The format is 1 sign bit, 11 exponent bits (biased 1023) and |
| 6270 | // 52 fraction bits (20 in the first word, 32 in the second). Zeros is a |
| 6271 | // scratch register. Destroys the source register. No GC occurs during this |
| 6272 | // stub so you don't have to set up the frame. |
| 6273 | class ConvertToDoubleStub : public CodeStub { |
| 6274 | public: |
| 6275 | ConvertToDoubleStub(Register result_reg_1, |
| 6276 | Register result_reg_2, |
| 6277 | Register source_reg, |
| 6278 | Register scratch_reg) |
| 6279 | : result1_(result_reg_1), |
| 6280 | result2_(result_reg_2), |
| 6281 | source_(source_reg), |
| 6282 | zeros_(scratch_reg) { } |
| 6283 | |
| 6284 | private: |
| 6285 | Register result1_; |
| 6286 | Register result2_; |
| 6287 | Register source_; |
| 6288 | Register zeros_; |
| 6289 | |
| 6290 | // Minor key encoding in 16 bits. |
| 6291 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 6292 | class OpBits: public BitField<Token::Value, 2, 14> {}; |
| 6293 | |
| 6294 | Major MajorKey() { return ConvertToDouble; } |
| 6295 | int MinorKey() { |
| 6296 | // Encode the parameters in a unique 16 bit value. |
| 6297 | return result1_.code() + |
| 6298 | (result2_.code() << 4) + |
| 6299 | (source_.code() << 8) + |
| 6300 | (zeros_.code() << 12); |
| 6301 | } |
| 6302 | |
| 6303 | void Generate(MacroAssembler* masm); |
| 6304 | |
| 6305 | const char* GetName() { return "ConvertToDoubleStub"; } |
| 6306 | |
| 6307 | #ifdef DEBUG |
| 6308 | void Print() { PrintF("ConvertToDoubleStub\n"); } |
| 6309 | #endif |
| 6310 | }; |
| 6311 | |
| 6312 | |
| 6313 | void ConvertToDoubleStub::Generate(MacroAssembler* masm) { |
| 6314 | #ifndef BIG_ENDIAN_FLOATING_POINT |
| 6315 | Register exponent = result1_; |
| 6316 | Register mantissa = result2_; |
| 6317 | #else |
| 6318 | Register exponent = result2_; |
| 6319 | Register mantissa = result1_; |
| 6320 | #endif |
| 6321 | Label not_special; |
| 6322 | // Convert from Smi to integer. |
| 6323 | __ mov(source_, Operand(source_, ASR, kSmiTagSize)); |
| 6324 | // Move sign bit from source to destination. This works because the sign bit |
| 6325 | // in the exponent word of the double has the same position and polarity as |
| 6326 | // the 2's complement sign bit in a Smi. |
| 6327 | ASSERT(HeapNumber::kSignMask == 0x80000000u); |
| 6328 | __ and_(exponent, source_, Operand(HeapNumber::kSignMask), SetCC); |
| 6329 | // Subtract from 0 if source was negative. |
| 6330 | __ rsb(source_, source_, Operand(0), LeaveCC, ne); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6331 | |
| 6332 | // We have -1, 0 or 1, which we treat specially. Register source_ contains |
| 6333 | // absolute value: it is either equal to 1 (special case of -1 and 1), |
| 6334 | // greater than 1 (not a special case) or less than 1 (special case of 0). |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6335 | __ cmp(source_, Operand(1)); |
| 6336 | __ b(gt, ¬_special); |
| 6337 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6338 | // For 1 or -1 we need to or in the 0 exponent (biased to 1023). |
| 6339 | static const uint32_t exponent_word_for_1 = |
| 6340 | HeapNumber::kExponentBias << HeapNumber::kExponentShift; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6341 | __ orr(exponent, exponent, Operand(exponent_word_for_1), LeaveCC, eq); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6342 | // 1, 0 and -1 all have 0 for the second word. |
| 6343 | __ mov(mantissa, Operand(0)); |
| 6344 | __ Ret(); |
| 6345 | |
| 6346 | __ bind(¬_special); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6347 | // Count leading zeros. Uses mantissa for a scratch register on pre-ARM5. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6348 | // Gets the wrong answer for 0, but we already checked for that case above. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6349 | __ CountLeadingZeros(source_, mantissa, zeros_); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6350 | // Compute exponent and or it into the exponent register. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6351 | // We use mantissa as a scratch register here. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6352 | __ rsb(mantissa, zeros_, Operand(31 + HeapNumber::kExponentBias)); |
| 6353 | __ orr(exponent, |
| 6354 | exponent, |
| 6355 | Operand(mantissa, LSL, HeapNumber::kExponentShift)); |
| 6356 | // Shift up the source chopping the top bit off. |
| 6357 | __ add(zeros_, zeros_, Operand(1)); |
| 6358 | // This wouldn't work for 1.0 or -1.0 as the shift would be 32 which means 0. |
| 6359 | __ mov(source_, Operand(source_, LSL, zeros_)); |
| 6360 | // Compute lower part of fraction (last 12 bits). |
| 6361 | __ mov(mantissa, Operand(source_, LSL, HeapNumber::kMantissaBitsInTopWord)); |
| 6362 | // And the top (top 20 bits). |
| 6363 | __ orr(exponent, |
| 6364 | exponent, |
| 6365 | Operand(source_, LSR, 32 - HeapNumber::kMantissaBitsInTopWord)); |
| 6366 | __ Ret(); |
| 6367 | } |
| 6368 | |
| 6369 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6370 | // See comment for class. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6371 | void WriteInt32ToHeapNumberStub::Generate(MacroAssembler* masm) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6372 | Label max_negative_int; |
| 6373 | // the_int_ has the answer which is a signed int32 but not a Smi. |
| 6374 | // We test for the special value that has a different exponent. This test |
| 6375 | // has the neat side effect of setting the flags according to the sign. |
| 6376 | ASSERT(HeapNumber::kSignMask == 0x80000000u); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 6377 | __ cmp(the_int_, Operand(0x80000000u)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 6378 | __ b(eq, &max_negative_int); |
| 6379 | // Set up the correct exponent in scratch_. All non-Smi int32s have the same. |
| 6380 | // A non-Smi integer is 1.xxx * 2^30 so the exponent is 30 (biased). |
| 6381 | uint32_t non_smi_exponent = |
| 6382 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 6383 | __ mov(scratch_, Operand(non_smi_exponent)); |
| 6384 | // Set the sign bit in scratch_ if the value was negative. |
| 6385 | __ orr(scratch_, scratch_, Operand(HeapNumber::kSignMask), LeaveCC, cs); |
| 6386 | // Subtract from 0 if the value was negative. |
| 6387 | __ rsb(the_int_, the_int_, Operand(0), LeaveCC, cs); |
| 6388 | // We should be masking the implict first digit of the mantissa away here, |
| 6389 | // but it just ends up combining harmlessly with the last digit of the |
| 6390 | // exponent that happens to be 1. The sign bit is 0 so we shift 10 to get |
| 6391 | // the most significant 1 to hit the last bit of the 12 bit sign and exponent. |
| 6392 | ASSERT(((1 << HeapNumber::kExponentShift) & non_smi_exponent) != 0); |
| 6393 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 6394 | __ orr(scratch_, scratch_, Operand(the_int_, LSR, shift_distance)); |
| 6395 | __ str(scratch_, FieldMemOperand(the_heap_number_, |
| 6396 | HeapNumber::kExponentOffset)); |
| 6397 | __ mov(scratch_, Operand(the_int_, LSL, 32 - shift_distance)); |
| 6398 | __ str(scratch_, FieldMemOperand(the_heap_number_, |
| 6399 | HeapNumber::kMantissaOffset)); |
| 6400 | __ Ret(); |
| 6401 | |
| 6402 | __ bind(&max_negative_int); |
| 6403 | // The max negative int32 is stored as a positive number in the mantissa of |
| 6404 | // a double because it uses a sign bit instead of using two's complement. |
| 6405 | // The actual mantissa bits stored are all 0 because the implicit most |
| 6406 | // significant 1 bit is not stored. |
| 6407 | non_smi_exponent += 1 << HeapNumber::kExponentShift; |
| 6408 | __ mov(ip, Operand(HeapNumber::kSignMask | non_smi_exponent)); |
| 6409 | __ str(ip, FieldMemOperand(the_heap_number_, HeapNumber::kExponentOffset)); |
| 6410 | __ mov(ip, Operand(0)); |
| 6411 | __ str(ip, FieldMemOperand(the_heap_number_, HeapNumber::kMantissaOffset)); |
| 6412 | __ Ret(); |
| 6413 | } |
| 6414 | |
| 6415 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6416 | // Handle the case where the lhs and rhs are the same object. |
| 6417 | // Equality is almost reflexive (everything but NaN), so this is a test |
| 6418 | // for "identity and not NaN". |
| 6419 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 6420 | Label* slow, |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6421 | Condition cc, |
| 6422 | bool never_nan_nan) { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6423 | Label not_identical; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6424 | Label heap_number, return_equal; |
| 6425 | Register exp_mask_reg = r5; |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6426 | __ cmp(r0, r1); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6427 | __ b(ne, ¬_identical); |
| 6428 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6429 | // The two objects are identical. If we know that one of them isn't NaN then |
| 6430 | // we now know they test equal. |
| 6431 | if (cc != eq || !never_nan_nan) { |
| 6432 | __ mov(exp_mask_reg, Operand(HeapNumber::kExponentMask)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6433 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6434 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| 6435 | // so we do the second best thing - test it ourselves. |
| 6436 | // They are both equal and they are not both Smis so both of them are not |
| 6437 | // Smis. If it's not a heap number, then return equal. |
| 6438 | if (cc == lt || cc == gt) { |
| 6439 | __ CompareObjectType(r0, r4, r4, FIRST_JS_OBJECT_TYPE); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6440 | __ b(ge, slow); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6441 | } else { |
| 6442 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 6443 | __ b(eq, &heap_number); |
| 6444 | // Comparing JS objects with <=, >= is complicated. |
| 6445 | if (cc != eq) { |
| 6446 | __ cmp(r4, Operand(FIRST_JS_OBJECT_TYPE)); |
| 6447 | __ b(ge, slow); |
| 6448 | // Normally here we fall through to return_equal, but undefined is |
| 6449 | // special: (undefined == undefined) == true, but |
| 6450 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 6451 | if (cc == le || cc == ge) { |
| 6452 | __ cmp(r4, Operand(ODDBALL_TYPE)); |
| 6453 | __ b(ne, &return_equal); |
| 6454 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 6455 | __ cmp(r0, r2); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6456 | __ b(ne, &return_equal); |
| 6457 | if (cc == le) { |
| 6458 | // undefined <= undefined should fail. |
| 6459 | __ mov(r0, Operand(GREATER)); |
| 6460 | } else { |
| 6461 | // undefined >= undefined should fail. |
| 6462 | __ mov(r0, Operand(LESS)); |
| 6463 | } |
| 6464 | __ mov(pc, Operand(lr)); // Return. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6465 | } |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6466 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6467 | } |
| 6468 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6469 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6470 | __ bind(&return_equal); |
| 6471 | if (cc == lt) { |
| 6472 | __ mov(r0, Operand(GREATER)); // Things aren't less than themselves. |
| 6473 | } else if (cc == gt) { |
| 6474 | __ mov(r0, Operand(LESS)); // Things aren't greater than themselves. |
| 6475 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6476 | __ mov(r0, Operand(EQUAL)); // Things are <=, >=, ==, === themselves. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6477 | } |
| 6478 | __ mov(pc, Operand(lr)); // Return. |
| 6479 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6480 | if (cc != eq || !never_nan_nan) { |
| 6481 | // For less and greater we don't have to check for NaN since the result of |
| 6482 | // x < x is false regardless. For the others here is some code to check |
| 6483 | // for NaN. |
| 6484 | if (cc != lt && cc != gt) { |
| 6485 | __ bind(&heap_number); |
| 6486 | // It is a heap number, so return non-equal if it's NaN and equal if it's |
| 6487 | // not NaN. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6488 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6489 | // The representation of NaN values has all exponent bits (52..62) set, |
| 6490 | // and not all mantissa bits (0..51) clear. |
| 6491 | // Read top bits of double representation (second word of value). |
| 6492 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 6493 | // Test that exponent bits are all set. |
| 6494 | __ and_(r3, r2, Operand(exp_mask_reg)); |
| 6495 | __ cmp(r3, Operand(exp_mask_reg)); |
| 6496 | __ b(ne, &return_equal); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6497 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6498 | // Shift out flag and all exponent bits, retaining only mantissa. |
| 6499 | __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord)); |
| 6500 | // Or with all low-bits of mantissa. |
| 6501 | __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| 6502 | __ orr(r0, r3, Operand(r2), SetCC); |
| 6503 | // For equal we already have the right value in r0: Return zero (equal) |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6504 | // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| 6505 | // not (it's a NaN). For <= and >= we need to load r0 with the failing |
| 6506 | // value if it's a NaN. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6507 | if (cc != eq) { |
| 6508 | // All-zero means Infinity means equal. |
| 6509 | __ mov(pc, Operand(lr), LeaveCC, eq); // Return equal |
| 6510 | if (cc == le) { |
| 6511 | __ mov(r0, Operand(GREATER)); // NaN <= NaN should fail. |
| 6512 | } else { |
| 6513 | __ mov(r0, Operand(LESS)); // NaN >= NaN should fail. |
| 6514 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6515 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6516 | __ mov(pc, Operand(lr)); // Return. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6517 | } |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6518 | // No fall through here. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6519 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6520 | |
| 6521 | __ bind(¬_identical); |
| 6522 | } |
| 6523 | |
| 6524 | |
| 6525 | // See comment at call site. |
| 6526 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6527 | Label* lhs_not_nan, |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6528 | Label* slow, |
| 6529 | bool strict) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6530 | Label rhs_is_smi; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6531 | __ tst(r0, Operand(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6532 | __ b(eq, &rhs_is_smi); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6533 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6534 | // Lhs is a Smi. Check whether the rhs is a heap number. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6535 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 6536 | if (strict) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6537 | // If rhs is not a number and lhs is a Smi then strict equality cannot |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6538 | // succeed. Return non-equal (r0 is already not zero) |
| 6539 | __ mov(pc, Operand(lr), LeaveCC, ne); // Return. |
| 6540 | } else { |
| 6541 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 6542 | // the runtime. |
| 6543 | __ b(ne, slow); |
| 6544 | } |
| 6545 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6546 | // Lhs (r1) is a smi, rhs (r0) is a number. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6547 | if (CpuFeatures::IsSupported(VFP3)) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6548 | // Convert lhs to a double in d7 . |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6549 | CpuFeatures::Scope scope(VFP3); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6550 | __ mov(r7, Operand(r1, ASR, kSmiTagSize)); |
| 6551 | __ vmov(s15, r7); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6552 | __ vcvt_f64_s32(d7, s15); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6553 | // Load the double from rhs, tagged HeapNumber r0, to d6. |
| 6554 | __ sub(r7, r0, Operand(kHeapObjectTag)); |
| 6555 | __ vldr(d6, r7, HeapNumber::kValueOffset); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6556 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6557 | __ push(lr); |
| 6558 | // Convert lhs to a double in r2, r3. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6559 | __ mov(r7, Operand(r1)); |
| 6560 | ConvertToDoubleStub stub1(r3, r2, r7, r6); |
| 6561 | __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6562 | // Load rhs to a double in r0, r1. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 6563 | __ Ldrd(r0, r1, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6564 | __ pop(lr); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6565 | } |
| 6566 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6567 | // We now have both loaded as doubles but we can skip the lhs nan check |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6568 | // since it's a smi. |
| 6569 | __ jmp(lhs_not_nan); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6570 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6571 | __ bind(&rhs_is_smi); |
| 6572 | // Rhs is a smi. Check whether the non-smi lhs is a heap number. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6573 | __ CompareObjectType(r1, r4, r4, HEAP_NUMBER_TYPE); |
| 6574 | if (strict) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6575 | // If lhs is not a number and rhs is a smi then strict equality cannot |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6576 | // succeed. Return non-equal. |
| 6577 | __ mov(r0, Operand(1), LeaveCC, ne); // Non-zero indicates not equal. |
| 6578 | __ mov(pc, Operand(lr), LeaveCC, ne); // Return. |
| 6579 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6580 | // Smi compared non-strictly with a non-smi non-heap-number. Call |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6581 | // the runtime. |
| 6582 | __ b(ne, slow); |
| 6583 | } |
| 6584 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6585 | // Rhs (r0) is a smi, lhs (r1) is a heap number. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6586 | if (CpuFeatures::IsSupported(VFP3)) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6587 | // Convert rhs to a double in d6 . |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6588 | CpuFeatures::Scope scope(VFP3); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6589 | // Load the double from lhs, tagged HeapNumber r1, to d7. |
| 6590 | __ sub(r7, r1, Operand(kHeapObjectTag)); |
| 6591 | __ vldr(d7, r7, HeapNumber::kValueOffset); |
| 6592 | __ mov(r7, Operand(r0, ASR, kSmiTagSize)); |
| 6593 | __ vmov(s13, r7); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 6594 | __ vcvt_f64_s32(d6, s13); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6595 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6596 | __ push(lr); |
| 6597 | // Load lhs to a double in r2, r3. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 6598 | __ Ldrd(r2, r3, FieldMemOperand(r1, HeapNumber::kValueOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6599 | // Convert rhs to a double in r0, r1. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6600 | __ mov(r7, Operand(r0)); |
| 6601 | ConvertToDoubleStub stub2(r1, r0, r7, r6); |
| 6602 | __ Call(stub2.GetCode(), RelocInfo::CODE_TARGET); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6603 | __ pop(lr); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6604 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6605 | // Fall through to both_loaded_as_doubles. |
| 6606 | } |
| 6607 | |
| 6608 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6609 | void EmitNanCheck(MacroAssembler* masm, Label* lhs_not_nan, Condition cc) { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6610 | bool exp_first = (HeapNumber::kExponentOffset == HeapNumber::kValueOffset); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6611 | Register rhs_exponent = exp_first ? r0 : r1; |
| 6612 | Register lhs_exponent = exp_first ? r2 : r3; |
| 6613 | Register rhs_mantissa = exp_first ? r1 : r0; |
| 6614 | Register lhs_mantissa = exp_first ? r3 : r2; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6615 | Label one_is_nan, neither_is_nan; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6616 | Label lhs_not_nan_exp_mask_is_loaded; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6617 | |
| 6618 | Register exp_mask_reg = r5; |
| 6619 | |
| 6620 | __ mov(exp_mask_reg, Operand(HeapNumber::kExponentMask)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6621 | __ and_(r4, lhs_exponent, Operand(exp_mask_reg)); |
| 6622 | __ cmp(r4, Operand(exp_mask_reg)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6623 | __ b(ne, &lhs_not_nan_exp_mask_is_loaded); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6624 | __ mov(r4, |
| 6625 | Operand(lhs_exponent, LSL, HeapNumber::kNonMantissaBitsInTopWord), |
| 6626 | SetCC); |
| 6627 | __ b(ne, &one_is_nan); |
| 6628 | __ cmp(lhs_mantissa, Operand(0)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6629 | __ b(ne, &one_is_nan); |
| 6630 | |
| 6631 | __ bind(lhs_not_nan); |
| 6632 | __ mov(exp_mask_reg, Operand(HeapNumber::kExponentMask)); |
| 6633 | __ bind(&lhs_not_nan_exp_mask_is_loaded); |
| 6634 | __ and_(r4, rhs_exponent, Operand(exp_mask_reg)); |
| 6635 | __ cmp(r4, Operand(exp_mask_reg)); |
| 6636 | __ b(ne, &neither_is_nan); |
| 6637 | __ mov(r4, |
| 6638 | Operand(rhs_exponent, LSL, HeapNumber::kNonMantissaBitsInTopWord), |
| 6639 | SetCC); |
| 6640 | __ b(ne, &one_is_nan); |
| 6641 | __ cmp(rhs_mantissa, Operand(0)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6642 | __ b(eq, &neither_is_nan); |
| 6643 | |
| 6644 | __ bind(&one_is_nan); |
| 6645 | // NaN comparisons always fail. |
| 6646 | // Load whatever we need in r0 to make the comparison fail. |
| 6647 | if (cc == lt || cc == le) { |
| 6648 | __ mov(r0, Operand(GREATER)); |
| 6649 | } else { |
| 6650 | __ mov(r0, Operand(LESS)); |
| 6651 | } |
| 6652 | __ mov(pc, Operand(lr)); // Return. |
| 6653 | |
| 6654 | __ bind(&neither_is_nan); |
| 6655 | } |
| 6656 | |
| 6657 | |
| 6658 | // See comment at call site. |
| 6659 | static void EmitTwoNonNanDoubleComparison(MacroAssembler* masm, Condition cc) { |
| 6660 | bool exp_first = (HeapNumber::kExponentOffset == HeapNumber::kValueOffset); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6661 | Register rhs_exponent = exp_first ? r0 : r1; |
| 6662 | Register lhs_exponent = exp_first ? r2 : r3; |
| 6663 | Register rhs_mantissa = exp_first ? r1 : r0; |
| 6664 | Register lhs_mantissa = exp_first ? r3 : r2; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6665 | |
| 6666 | // r0, r1, r2, r3 have the two doubles. Neither is a NaN. |
| 6667 | if (cc == eq) { |
| 6668 | // Doubles are not equal unless they have the same bit pattern. |
| 6669 | // Exception: 0 and -0. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6670 | __ cmp(rhs_mantissa, Operand(lhs_mantissa)); |
| 6671 | __ orr(r0, rhs_mantissa, Operand(lhs_mantissa), LeaveCC, ne); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6672 | // Return non-zero if the numbers are unequal. |
| 6673 | __ mov(pc, Operand(lr), LeaveCC, ne); |
| 6674 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6675 | __ sub(r0, rhs_exponent, Operand(lhs_exponent), SetCC); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6676 | // If exponents are equal then return 0. |
| 6677 | __ mov(pc, Operand(lr), LeaveCC, eq); |
| 6678 | |
| 6679 | // Exponents are unequal. The only way we can return that the numbers |
| 6680 | // are equal is if one is -0 and the other is 0. We already dealt |
| 6681 | // with the case where both are -0 or both are 0. |
| 6682 | // We start by seeing if the mantissas (that are equal) or the bottom |
| 6683 | // 31 bits of the rhs exponent are non-zero. If so we return not |
| 6684 | // equal. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6685 | __ orr(r4, lhs_mantissa, Operand(lhs_exponent, LSL, kSmiTagSize), SetCC); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6686 | __ mov(r0, Operand(r4), LeaveCC, ne); |
| 6687 | __ mov(pc, Operand(lr), LeaveCC, ne); // Return conditionally. |
| 6688 | // Now they are equal if and only if the lhs exponent is zero in its |
| 6689 | // low 31 bits. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6690 | __ mov(r0, Operand(rhs_exponent, LSL, kSmiTagSize)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6691 | __ mov(pc, Operand(lr)); |
| 6692 | } else { |
| 6693 | // Call a native function to do a comparison between two non-NaNs. |
| 6694 | // Call C routine that may not cause GC or other trouble. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 6695 | __ push(lr); |
| 6696 | __ PrepareCallCFunction(4, r5); // Two doubles count as 4 arguments. |
| 6697 | __ CallCFunction(ExternalReference::compare_doubles(), 4); |
| 6698 | __ pop(pc); // Return. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6699 | } |
| 6700 | } |
| 6701 | |
| 6702 | |
| 6703 | // See comment at call site. |
| 6704 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm) { |
| 6705 | // If either operand is a JSObject or an oddball value, then they are |
| 6706 | // not equal since their pointers are different. |
| 6707 | // There is no test for undetectability in strict equality. |
| 6708 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 6709 | Label first_non_object; |
| 6710 | // Get the type of the first operand into r2 and compare it with |
| 6711 | // FIRST_JS_OBJECT_TYPE. |
| 6712 | __ CompareObjectType(r0, r2, r2, FIRST_JS_OBJECT_TYPE); |
| 6713 | __ b(lt, &first_non_object); |
| 6714 | |
| 6715 | // Return non-zero (r0 is not zero) |
| 6716 | Label return_not_equal; |
| 6717 | __ bind(&return_not_equal); |
| 6718 | __ mov(pc, Operand(lr)); // Return. |
| 6719 | |
| 6720 | __ bind(&first_non_object); |
| 6721 | // Check for oddballs: true, false, null, undefined. |
| 6722 | __ cmp(r2, Operand(ODDBALL_TYPE)); |
| 6723 | __ b(eq, &return_not_equal); |
| 6724 | |
| 6725 | __ CompareObjectType(r1, r3, r3, FIRST_JS_OBJECT_TYPE); |
| 6726 | __ b(ge, &return_not_equal); |
| 6727 | |
| 6728 | // Check for oddballs: true, false, null, undefined. |
| 6729 | __ cmp(r3, Operand(ODDBALL_TYPE)); |
| 6730 | __ b(eq, &return_not_equal); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6731 | |
| 6732 | // Now that we have the types we might as well check for symbol-symbol. |
| 6733 | // Ensure that no non-strings have the symbol bit set. |
| 6734 | ASSERT(kNotStringTag + kIsSymbolMask > LAST_TYPE); |
| 6735 | ASSERT(kSymbolTag != 0); |
| 6736 | __ and_(r2, r2, Operand(r3)); |
| 6737 | __ tst(r2, Operand(kIsSymbolMask)); |
| 6738 | __ b(ne, &return_not_equal); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6739 | } |
| 6740 | |
| 6741 | |
| 6742 | // See comment at call site. |
| 6743 | static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, |
| 6744 | Label* both_loaded_as_doubles, |
| 6745 | Label* not_heap_numbers, |
| 6746 | Label* slow) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6747 | __ CompareObjectType(r0, r3, r2, HEAP_NUMBER_TYPE); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6748 | __ b(ne, not_heap_numbers); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6749 | __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 6750 | __ cmp(r2, r3); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6751 | __ b(ne, slow); // First was a heap number, second wasn't. Go slow case. |
| 6752 | |
| 6753 | // Both are heap numbers. Load them up then jump to the code we have |
| 6754 | // for that. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6755 | if (CpuFeatures::IsSupported(VFP3)) { |
| 6756 | CpuFeatures::Scope scope(VFP3); |
| 6757 | __ sub(r7, r0, Operand(kHeapObjectTag)); |
| 6758 | __ vldr(d6, r7, HeapNumber::kValueOffset); |
| 6759 | __ sub(r7, r1, Operand(kHeapObjectTag)); |
| 6760 | __ vldr(d7, r7, HeapNumber::kValueOffset); |
| 6761 | } else { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 6762 | __ Ldrd(r2, r3, FieldMemOperand(r1, HeapNumber::kValueOffset)); |
| 6763 | __ Ldrd(r0, r1, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6764 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6765 | __ jmp(both_loaded_as_doubles); |
| 6766 | } |
| 6767 | |
| 6768 | |
| 6769 | // Fast negative check for symbol-to-symbol equality. |
| 6770 | static void EmitCheckForSymbols(MacroAssembler* masm, Label* slow) { |
| 6771 | // r2 is object type of r0. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6772 | // Ensure that no non-strings have the symbol bit set. |
| 6773 | ASSERT(kNotStringTag + kIsSymbolMask > LAST_TYPE); |
| 6774 | ASSERT(kSymbolTag != 0); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6775 | __ tst(r2, Operand(kIsSymbolMask)); |
| 6776 | __ b(eq, slow); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6777 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 6778 | __ ldrb(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset)); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6779 | __ tst(r3, Operand(kIsSymbolMask)); |
| 6780 | __ b(eq, slow); |
| 6781 | |
| 6782 | // Both are symbols. We already checked they weren't the same pointer |
| 6783 | // so they are not equal. |
| 6784 | __ mov(r0, Operand(1)); // Non-zero indicates not equal. |
| 6785 | __ mov(pc, Operand(lr)); // Return. |
| 6786 | } |
| 6787 | |
| 6788 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6789 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 6790 | Register object, |
| 6791 | Register result, |
| 6792 | Register scratch1, |
| 6793 | Register scratch2, |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6794 | Register scratch3, |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6795 | bool object_is_smi, |
| 6796 | Label* not_found) { |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6797 | // Use of registers. Register result is used as a temporary. |
| 6798 | Register number_string_cache = result; |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6799 | Register mask = scratch3; |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6800 | |
| 6801 | // Load the number string cache. |
| 6802 | __ LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| 6803 | |
| 6804 | // Make the hash mask from the length of the number string cache. It |
| 6805 | // contains two elements (number and string) for each cache entry. |
| 6806 | __ ldr(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 6807 | // Divide length by two (length is a smi). |
| 6808 | __ mov(mask, Operand(mask, ASR, kSmiTagSize + 1)); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6809 | __ sub(mask, mask, Operand(1)); // Make mask. |
| 6810 | |
| 6811 | // Calculate the entry in the number string cache. The hash value in the |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6812 | // number string cache for smis is just the smi value, and the hash for |
| 6813 | // doubles is the xor of the upper and lower words. See |
| 6814 | // Heap::GetNumberStringCache. |
| 6815 | Label is_smi; |
| 6816 | Label load_result_from_cache; |
| 6817 | if (!object_is_smi) { |
| 6818 | __ BranchOnSmi(object, &is_smi); |
| 6819 | if (CpuFeatures::IsSupported(VFP3)) { |
| 6820 | CpuFeatures::Scope scope(VFP3); |
| 6821 | __ CheckMap(object, |
| 6822 | scratch1, |
| 6823 | Factory::heap_number_map(), |
| 6824 | not_found, |
| 6825 | true); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6826 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6827 | ASSERT_EQ(8, kDoubleSize); |
| 6828 | __ add(scratch1, |
| 6829 | object, |
| 6830 | Operand(HeapNumber::kValueOffset - kHeapObjectTag)); |
| 6831 | __ ldm(ia, scratch1, scratch1.bit() | scratch2.bit()); |
| 6832 | __ eor(scratch1, scratch1, Operand(scratch2)); |
| 6833 | __ and_(scratch1, scratch1, Operand(mask)); |
| 6834 | |
| 6835 | // Calculate address of entry in string cache: each entry consists |
| 6836 | // of two pointer sized fields. |
| 6837 | __ add(scratch1, |
| 6838 | number_string_cache, |
| 6839 | Operand(scratch1, LSL, kPointerSizeLog2 + 1)); |
| 6840 | |
| 6841 | Register probe = mask; |
| 6842 | __ ldr(probe, |
| 6843 | FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| 6844 | __ BranchOnSmi(probe, not_found); |
| 6845 | __ sub(scratch2, object, Operand(kHeapObjectTag)); |
| 6846 | __ vldr(d0, scratch2, HeapNumber::kValueOffset); |
| 6847 | __ sub(probe, probe, Operand(kHeapObjectTag)); |
| 6848 | __ vldr(d1, probe, HeapNumber::kValueOffset); |
| 6849 | __ vcmp(d0, d1); |
| 6850 | __ vmrs(pc); |
| 6851 | __ b(ne, not_found); // The cache did not contain this value. |
| 6852 | __ b(&load_result_from_cache); |
| 6853 | } else { |
| 6854 | __ b(not_found); |
| 6855 | } |
| 6856 | } |
| 6857 | |
| 6858 | __ bind(&is_smi); |
| 6859 | Register scratch = scratch1; |
| 6860 | __ and_(scratch, mask, Operand(object, ASR, 1)); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6861 | // Calculate address of entry in string cache: each entry consists |
| 6862 | // of two pointer sized fields. |
| 6863 | __ add(scratch, |
| 6864 | number_string_cache, |
| 6865 | Operand(scratch, LSL, kPointerSizeLog2 + 1)); |
| 6866 | |
| 6867 | // Check if the entry is the smi we are looking for. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6868 | Register probe = mask; |
| 6869 | __ ldr(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| 6870 | __ cmp(object, probe); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6871 | __ b(ne, not_found); |
| 6872 | |
| 6873 | // Get the result from the cache. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6874 | __ bind(&load_result_from_cache); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6875 | __ ldr(result, |
| 6876 | FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize)); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6877 | __ IncrementCounter(&Counters::number_to_string_native, |
| 6878 | 1, |
| 6879 | scratch1, |
| 6880 | scratch2); |
| 6881 | } |
| 6882 | |
| 6883 | |
| 6884 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
| 6885 | Label runtime; |
| 6886 | |
| 6887 | __ ldr(r1, MemOperand(sp, 0)); |
| 6888 | |
| 6889 | // Generate code to lookup number in the number string cache. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6890 | GenerateLookupNumberStringCache(masm, r1, r0, r2, r3, r4, false, &runtime); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6891 | __ add(sp, sp, Operand(1 * kPointerSize)); |
| 6892 | __ Ret(); |
| 6893 | |
| 6894 | __ bind(&runtime); |
| 6895 | // Handle number to string in the runtime system if not found in the cache. |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 6896 | __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 6897 | } |
| 6898 | |
| 6899 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 6900 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 6901 | __ RecordWriteHelper(object_, offset_, scratch_); |
| 6902 | __ Ret(); |
| 6903 | } |
| 6904 | |
| 6905 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6906 | // On entry r0 (rhs) and r1 (lhs) are the values to be compared. |
| 6907 | // On exit r0 is 0, positive or negative to indicate the result of |
| 6908 | // the comparison. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6909 | void CompareStub::Generate(MacroAssembler* masm) { |
| 6910 | Label slow; // Call builtin. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6911 | Label not_smis, both_loaded_as_doubles, lhs_not_nan; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6912 | |
| 6913 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 6914 | // it is certain that at least one operand isn't a smi. |
| 6915 | |
| 6916 | // Handle the case where the objects are identical. Either returns the answer |
| 6917 | // or goes to slow. Only falls through if the objects were not identical. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6918 | EmitIdenticalObjectComparison(masm, &slow, cc_, never_nan_nan_); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6919 | |
| 6920 | // If either is a Smi (we know that not both are), then they can only |
| 6921 | // be strictly equal if the other is a HeapNumber. |
| 6922 | ASSERT_EQ(0, kSmiTag); |
| 6923 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 6924 | __ and_(r2, r0, Operand(r1)); |
| 6925 | __ tst(r2, Operand(kSmiTagMask)); |
| 6926 | __ b(ne, ¬_smis); |
| 6927 | // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| 6928 | // 1) Return the answer. |
| 6929 | // 2) Go to slow. |
| 6930 | // 3) Fall through to both_loaded_as_doubles. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6931 | // 4) Jump to lhs_not_nan. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6932 | // In cases 3 and 4 we have found out we were dealing with a number-number |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6933 | // comparison. If VFP3 is supported the double values of the numbers have |
| 6934 | // been loaded into d7 and d6. Otherwise, the double values have been loaded |
| 6935 | // into r0, r1, r2, and r3. |
| 6936 | EmitSmiNonsmiComparison(masm, &lhs_not_nan, &slow, strict_); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6937 | |
| 6938 | __ bind(&both_loaded_as_doubles); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6939 | // The arguments have been converted to doubles and stored in d6 and d7, if |
| 6940 | // VFP3 is supported, or in r0, r1, r2, and r3. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6941 | if (CpuFeatures::IsSupported(VFP3)) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6942 | __ bind(&lhs_not_nan); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6943 | CpuFeatures::Scope scope(VFP3); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6944 | Label no_nan; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6945 | // ARMv7 VFP3 instructions to implement double precision comparison. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6946 | __ vcmp(d7, d6); |
| 6947 | __ vmrs(pc); // Move vector status bits to normal status bits. |
| 6948 | Label nan; |
| 6949 | __ b(vs, &nan); |
| 6950 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 6951 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 6952 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 6953 | __ mov(pc, Operand(lr)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6954 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6955 | __ bind(&nan); |
| 6956 | // If one of the sides was a NaN then the v flag is set. Load r0 with |
| 6957 | // whatever it takes to make the comparison fail, since comparisons with NaN |
| 6958 | // always fail. |
| 6959 | if (cc_ == lt || cc_ == le) { |
| 6960 | __ mov(r0, Operand(GREATER)); |
| 6961 | } else { |
| 6962 | __ mov(r0, Operand(LESS)); |
| 6963 | } |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6964 | __ mov(pc, Operand(lr)); |
| 6965 | } else { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6966 | // Checks for NaN in the doubles we have loaded. Can return the answer or |
| 6967 | // fall through if neither is a NaN. Also binds lhs_not_nan. |
| 6968 | EmitNanCheck(masm, &lhs_not_nan, cc_); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 6969 | // Compares two doubles in r0, r1, r2, r3 that are not NaNs. Returns the |
| 6970 | // answer. Never falls through. |
| 6971 | EmitTwoNonNanDoubleComparison(masm, cc_); |
| 6972 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6973 | |
| 6974 | __ bind(¬_smis); |
| 6975 | // At this point we know we are dealing with two different objects, |
| 6976 | // and neither of them is a Smi. The objects are in r0 and r1. |
| 6977 | if (strict_) { |
| 6978 | // This returns non-equal for some object types, or falls through if it |
| 6979 | // was not lucky. |
| 6980 | EmitStrictTwoHeapObjectCompare(masm); |
| 6981 | } |
| 6982 | |
| 6983 | Label check_for_symbols; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6984 | Label flat_string_check; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6985 | // Check for heap-number-heap-number comparison. Can jump to slow case, |
| 6986 | // or load both doubles into r0, r1, r2, r3 and jump to the code that handles |
| 6987 | // that case. If the inputs are not doubles then jumps to check_for_symbols. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6988 | // In this case r2 will contain the type of r0. Never falls through. |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6989 | EmitCheckForTwoHeapNumbers(masm, |
| 6990 | &both_loaded_as_doubles, |
| 6991 | &check_for_symbols, |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 6992 | &flat_string_check); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6993 | |
| 6994 | __ bind(&check_for_symbols); |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 6995 | // In the strict case the EmitStrictTwoHeapObjectCompare already took care of |
| 6996 | // symbols. |
| 6997 | if (cc_ == eq && !strict_) { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 6998 | // Either jumps to slow or returns the answer. Assumes that r2 is the type |
| 6999 | // of r0 on entry. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7000 | EmitCheckForSymbols(masm, &flat_string_check); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7001 | } |
| 7002 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7003 | // Check for both being sequential ASCII strings, and inline if that is the |
| 7004 | // case. |
| 7005 | __ bind(&flat_string_check); |
| 7006 | |
| 7007 | __ JumpIfNonSmisNotBothSequentialAsciiStrings(r0, r1, r2, r3, &slow); |
| 7008 | |
| 7009 | __ IncrementCounter(&Counters::string_compare_native, 1, r2, r3); |
| 7010 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 7011 | r1, |
| 7012 | r0, |
| 7013 | r2, |
| 7014 | r3, |
| 7015 | r4, |
| 7016 | r5); |
| 7017 | // Never falls through to here. |
| 7018 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7019 | __ bind(&slow); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7020 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 7021 | __ Push(r1, r0); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7022 | // Figure out which native to call and setup the arguments. |
| 7023 | Builtins::JavaScript native; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7024 | if (cc_ == eq) { |
| 7025 | native = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 7026 | } else { |
| 7027 | native = Builtins::COMPARE; |
| 7028 | int ncr; // NaN compare result |
| 7029 | if (cc_ == lt || cc_ == le) { |
| 7030 | ncr = GREATER; |
| 7031 | } else { |
| 7032 | ASSERT(cc_ == gt || cc_ == ge); // remaining cases |
| 7033 | ncr = LESS; |
| 7034 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7035 | __ mov(r0, Operand(Smi::FromInt(ncr))); |
| 7036 | __ push(r0); |
| 7037 | } |
| 7038 | |
| 7039 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 7040 | // tagged as a small integer. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 7041 | __ InvokeBuiltin(native, JUMP_JS); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 7042 | } |
| 7043 | |
| 7044 | |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 7045 | // We fall into this code if the operands were Smis, but the result was |
| 7046 | // not (eg. overflow). We branch into this code (to the not_smi label) if |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7047 | // the operands were not both Smi. The operands are in r0 and r1. In order |
| 7048 | // to call the C-implemented binary fp operation routines we need to end up |
| 7049 | // with the double precision floating point operands in r0 and r1 (for the |
| 7050 | // value in r1) and r2 and r3 (for the value in r0). |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7051 | void GenericBinaryOpStub::HandleBinaryOpSlowCases( |
| 7052 | MacroAssembler* masm, |
| 7053 | Label* not_smi, |
| 7054 | Register lhs, |
| 7055 | Register rhs, |
| 7056 | const Builtins::JavaScript& builtin) { |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7057 | Label slow, slow_reverse, do_the_call; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7058 | bool use_fp_registers = CpuFeatures::IsSupported(VFP3) && Token::MOD != op_; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7059 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 7060 | ASSERT((lhs.is(r0) && rhs.is(r1)) || (lhs.is(r1) && rhs.is(r0))); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7061 | |
| 7062 | if (ShouldGenerateSmiCode()) { |
| 7063 | // Smi-smi case (overflow). |
| 7064 | // Since both are Smis there is no heap number to overwrite, so allocate. |
| 7065 | // The new heap number is in r5. r6 and r7 are scratch. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7066 | __ AllocateHeapNumber(r5, r6, r7, lhs.is(r0) ? &slow_reverse : &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7067 | |
| 7068 | // If we have floating point hardware, inline ADD, SUB, MUL, and DIV, |
| 7069 | // using registers d7 and d6 for the double values. |
| 7070 | if (use_fp_registers) { |
| 7071 | CpuFeatures::Scope scope(VFP3); |
| 7072 | __ mov(r7, Operand(rhs, ASR, kSmiTagSize)); |
| 7073 | __ vmov(s15, r7); |
| 7074 | __ vcvt_f64_s32(d7, s15); |
| 7075 | __ mov(r7, Operand(lhs, ASR, kSmiTagSize)); |
| 7076 | __ vmov(s13, r7); |
| 7077 | __ vcvt_f64_s32(d6, s13); |
| 7078 | } else { |
| 7079 | // Write Smi from rhs to r3 and r2 in double format. r6 is scratch. |
| 7080 | __ mov(r7, Operand(rhs)); |
| 7081 | ConvertToDoubleStub stub1(r3, r2, r7, r6); |
| 7082 | __ push(lr); |
| 7083 | __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET); |
| 7084 | // Write Smi from lhs to r1 and r0 in double format. r6 is scratch. |
| 7085 | __ mov(r7, Operand(lhs)); |
| 7086 | ConvertToDoubleStub stub2(r1, r0, r7, r6); |
| 7087 | __ Call(stub2.GetCode(), RelocInfo::CODE_TARGET); |
| 7088 | __ pop(lr); |
| 7089 | } |
| 7090 | __ jmp(&do_the_call); // Tail call. No return. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7091 | } |
| 7092 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7093 | // We branch here if at least one of r0 and r1 is not a Smi. |
| 7094 | __ bind(not_smi); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7095 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7096 | // After this point we have the left hand side in r1 and the right hand side |
| 7097 | // in r0. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7098 | if (lhs.is(r0)) { |
| 7099 | __ Swap(r0, r1, ip); |
| 7100 | } |
| 7101 | |
| 7102 | if (ShouldGenerateFPCode()) { |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7103 | Label r0_is_smi, r1_is_smi, finished_loading_r0, finished_loading_r1; |
| 7104 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7105 | if (runtime_operands_type_ == BinaryOpIC::DEFAULT) { |
| 7106 | switch (op_) { |
| 7107 | case Token::ADD: |
| 7108 | case Token::SUB: |
| 7109 | case Token::MUL: |
| 7110 | case Token::DIV: |
| 7111 | GenerateTypeTransition(masm); |
| 7112 | break; |
| 7113 | |
| 7114 | default: |
| 7115 | break; |
| 7116 | } |
| 7117 | } |
| 7118 | |
| 7119 | if (mode_ == NO_OVERWRITE) { |
| 7120 | // In the case where there is no chance of an overwritable float we may as |
| 7121 | // well do the allocation immediately while r0 and r1 are untouched. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7122 | __ AllocateHeapNumber(r5, r6, r7, &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7123 | } |
| 7124 | |
| 7125 | // Move r0 to a double in r2-r3. |
| 7126 | __ tst(r0, Operand(kSmiTagMask)); |
| 7127 | __ b(eq, &r0_is_smi); // It's a Smi so don't check it's a heap number. |
| 7128 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 7129 | __ b(ne, &slow); |
| 7130 | if (mode_ == OVERWRITE_RIGHT) { |
| 7131 | __ mov(r5, Operand(r0)); // Overwrite this heap number. |
| 7132 | } |
| 7133 | if (use_fp_registers) { |
| 7134 | CpuFeatures::Scope scope(VFP3); |
| 7135 | // Load the double from tagged HeapNumber r0 to d7. |
| 7136 | __ sub(r7, r0, Operand(kHeapObjectTag)); |
| 7137 | __ vldr(d7, r7, HeapNumber::kValueOffset); |
| 7138 | } else { |
| 7139 | // Calling convention says that second double is in r2 and r3. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 7140 | __ Ldrd(r2, r3, FieldMemOperand(r0, HeapNumber::kValueOffset)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7141 | } |
| 7142 | __ jmp(&finished_loading_r0); |
| 7143 | __ bind(&r0_is_smi); |
| 7144 | if (mode_ == OVERWRITE_RIGHT) { |
| 7145 | // We can't overwrite a Smi so get address of new heap number into r5. |
| 7146 | __ AllocateHeapNumber(r5, r6, r7, &slow); |
| 7147 | } |
| 7148 | |
| 7149 | if (use_fp_registers) { |
| 7150 | CpuFeatures::Scope scope(VFP3); |
| 7151 | // Convert smi in r0 to double in d7. |
| 7152 | __ mov(r7, Operand(r0, ASR, kSmiTagSize)); |
| 7153 | __ vmov(s15, r7); |
| 7154 | __ vcvt_f64_s32(d7, s15); |
| 7155 | } else { |
| 7156 | // Write Smi from r0 to r3 and r2 in double format. |
| 7157 | __ mov(r7, Operand(r0)); |
| 7158 | ConvertToDoubleStub stub3(r3, r2, r7, r6); |
| 7159 | __ push(lr); |
| 7160 | __ Call(stub3.GetCode(), RelocInfo::CODE_TARGET); |
| 7161 | __ pop(lr); |
| 7162 | } |
| 7163 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7164 | // HEAP_NUMBERS stub is slower than GENERIC on a pair of smis. |
| 7165 | // r0 is known to be a smi. If r1 is also a smi then switch to GENERIC. |
| 7166 | Label r1_is_not_smi; |
| 7167 | if (runtime_operands_type_ == BinaryOpIC::HEAP_NUMBERS) { |
| 7168 | __ tst(r1, Operand(kSmiTagMask)); |
| 7169 | __ b(ne, &r1_is_not_smi); |
| 7170 | GenerateTypeTransition(masm); |
| 7171 | __ jmp(&r1_is_smi); |
| 7172 | } |
| 7173 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7174 | __ bind(&finished_loading_r0); |
| 7175 | |
| 7176 | // Move r1 to a double in r0-r1. |
| 7177 | __ tst(r1, Operand(kSmiTagMask)); |
| 7178 | __ b(eq, &r1_is_smi); // It's a Smi so don't check it's a heap number. |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7179 | __ bind(&r1_is_not_smi); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7180 | __ CompareObjectType(r1, r4, r4, HEAP_NUMBER_TYPE); |
| 7181 | __ b(ne, &slow); |
| 7182 | if (mode_ == OVERWRITE_LEFT) { |
| 7183 | __ mov(r5, Operand(r1)); // Overwrite this heap number. |
| 7184 | } |
| 7185 | if (use_fp_registers) { |
| 7186 | CpuFeatures::Scope scope(VFP3); |
| 7187 | // Load the double from tagged HeapNumber r1 to d6. |
| 7188 | __ sub(r7, r1, Operand(kHeapObjectTag)); |
| 7189 | __ vldr(d6, r7, HeapNumber::kValueOffset); |
| 7190 | } else { |
| 7191 | // Calling convention says that first double is in r0 and r1. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 7192 | __ Ldrd(r0, r1, FieldMemOperand(r1, HeapNumber::kValueOffset)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7193 | } |
| 7194 | __ jmp(&finished_loading_r1); |
| 7195 | __ bind(&r1_is_smi); |
| 7196 | if (mode_ == OVERWRITE_LEFT) { |
| 7197 | // We can't overwrite a Smi so get address of new heap number into r5. |
| 7198 | __ AllocateHeapNumber(r5, r6, r7, &slow); |
| 7199 | } |
| 7200 | |
| 7201 | if (use_fp_registers) { |
| 7202 | CpuFeatures::Scope scope(VFP3); |
| 7203 | // Convert smi in r1 to double in d6. |
| 7204 | __ mov(r7, Operand(r1, ASR, kSmiTagSize)); |
| 7205 | __ vmov(s13, r7); |
| 7206 | __ vcvt_f64_s32(d6, s13); |
| 7207 | } else { |
| 7208 | // Write Smi from r1 to r1 and r0 in double format. |
| 7209 | __ mov(r7, Operand(r1)); |
| 7210 | ConvertToDoubleStub stub4(r1, r0, r7, r6); |
| 7211 | __ push(lr); |
| 7212 | __ Call(stub4.GetCode(), RelocInfo::CODE_TARGET); |
| 7213 | __ pop(lr); |
| 7214 | } |
| 7215 | |
| 7216 | __ bind(&finished_loading_r1); |
| 7217 | |
| 7218 | __ bind(&do_the_call); |
| 7219 | // If we are inlining the operation using VFP3 instructions for |
| 7220 | // add, subtract, multiply, or divide, the arguments are in d6 and d7. |
| 7221 | if (use_fp_registers) { |
| 7222 | CpuFeatures::Scope scope(VFP3); |
| 7223 | // ARMv7 VFP3 instructions to implement |
| 7224 | // double precision, add, subtract, multiply, divide. |
| 7225 | |
| 7226 | if (Token::MUL == op_) { |
| 7227 | __ vmul(d5, d6, d7); |
| 7228 | } else if (Token::DIV == op_) { |
| 7229 | __ vdiv(d5, d6, d7); |
| 7230 | } else if (Token::ADD == op_) { |
| 7231 | __ vadd(d5, d6, d7); |
| 7232 | } else if (Token::SUB == op_) { |
| 7233 | __ vsub(d5, d6, d7); |
| 7234 | } else { |
| 7235 | UNREACHABLE(); |
| 7236 | } |
| 7237 | __ sub(r0, r5, Operand(kHeapObjectTag)); |
| 7238 | __ vstr(d5, r0, HeapNumber::kValueOffset); |
| 7239 | __ add(r0, r0, Operand(kHeapObjectTag)); |
| 7240 | __ mov(pc, lr); |
| 7241 | } else { |
| 7242 | // If we did not inline the operation, then the arguments are in: |
| 7243 | // r0: Left value (least significant part of mantissa). |
| 7244 | // r1: Left value (sign, exponent, top of mantissa). |
| 7245 | // r2: Right value (least significant part of mantissa). |
| 7246 | // r3: Right value (sign, exponent, top of mantissa). |
| 7247 | // r5: Address of heap number for result. |
| 7248 | |
| 7249 | __ push(lr); // For later. |
| 7250 | __ PrepareCallCFunction(4, r4); // Two doubles count as 4 arguments. |
| 7251 | // Call C routine that may not cause GC or other trouble. r5 is callee |
| 7252 | // save. |
| 7253 | __ CallCFunction(ExternalReference::double_fp_operation(op_), 4); |
| 7254 | // Store answer in the overwritable heap number. |
| 7255 | #if !defined(USE_ARM_EABI) |
| 7256 | // Double returned in fp coprocessor register 0 and 1, encoded as register |
| 7257 | // cr8. Offsets must be divisible by 4 for coprocessor so we need to |
| 7258 | // substract the tag from r5. |
| 7259 | __ sub(r4, r5, Operand(kHeapObjectTag)); |
| 7260 | __ stc(p1, cr8, MemOperand(r4, HeapNumber::kValueOffset)); |
| 7261 | #else |
| 7262 | // Double returned in registers 0 and 1. |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 7263 | __ Strd(r0, r1, FieldMemOperand(r5, HeapNumber::kValueOffset)); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7264 | #endif |
| 7265 | __ mov(r0, Operand(r5)); |
| 7266 | // And we are done. |
| 7267 | __ pop(pc); |
| 7268 | } |
| 7269 | } |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 7270 | |
| 7271 | |
| 7272 | if (lhs.is(r0)) { |
| 7273 | __ b(&slow); |
| 7274 | __ bind(&slow_reverse); |
| 7275 | __ Swap(r0, r1, ip); |
| 7276 | } |
| 7277 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7278 | // We jump to here if something goes wrong (one param is not a number of any |
| 7279 | // sort or new-space allocation fails). |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7280 | __ bind(&slow); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7281 | |
| 7282 | // Push arguments to the stack |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 7283 | __ Push(r1, r0); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7284 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7285 | if (Token::ADD == op_) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7286 | // Test for string arguments before calling runtime. |
| 7287 | // r1 : first argument |
| 7288 | // r0 : second argument |
| 7289 | // sp[0] : second argument |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 7290 | // sp[4] : first argument |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7291 | |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7292 | Label not_strings, not_string1, string1, string1_smi2; |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7293 | __ tst(r1, Operand(kSmiTagMask)); |
| 7294 | __ b(eq, ¬_string1); |
| 7295 | __ CompareObjectType(r1, r2, r2, FIRST_NONSTRING_TYPE); |
| 7296 | __ b(ge, ¬_string1); |
| 7297 | |
| 7298 | // First argument is a a string, test second. |
| 7299 | __ tst(r0, Operand(kSmiTagMask)); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7300 | __ b(eq, &string1_smi2); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7301 | __ CompareObjectType(r0, r2, r2, FIRST_NONSTRING_TYPE); |
| 7302 | __ b(ge, &string1); |
| 7303 | |
| 7304 | // First and second argument are strings. |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7305 | StringAddStub string_add_stub(NO_STRING_CHECK_IN_STUB); |
| 7306 | __ TailCallStub(&string_add_stub); |
| 7307 | |
| 7308 | __ bind(&string1_smi2); |
| 7309 | // First argument is a string, second is a smi. Try to lookup the number |
| 7310 | // string for the smi in the number string cache. |
| 7311 | NumberToStringStub::GenerateLookupNumberStringCache( |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 7312 | masm, r0, r2, r4, r5, r6, true, &string1); |
fschneider@chromium.org | 086aac6 | 2010-03-17 13:18:24 +0000 | [diff] [blame] | 7313 | |
| 7314 | // Replace second argument on stack and tailcall string add stub to make |
| 7315 | // the result. |
| 7316 | __ str(r2, MemOperand(sp, 0)); |
| 7317 | __ TailCallStub(&string_add_stub); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7318 | |
| 7319 | // Only first argument is a string. |
| 7320 | __ bind(&string1); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7321 | __ InvokeBuiltin(Builtins::STRING_ADD_LEFT, JUMP_JS); |
| 7322 | |
| 7323 | // First argument was not a string, test second. |
| 7324 | __ bind(¬_string1); |
| 7325 | __ tst(r0, Operand(kSmiTagMask)); |
| 7326 | __ b(eq, ¬_strings); |
| 7327 | __ CompareObjectType(r0, r2, r2, FIRST_NONSTRING_TYPE); |
| 7328 | __ b(ge, ¬_strings); |
| 7329 | |
| 7330 | // Only second argument is a string. |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 7331 | __ InvokeBuiltin(Builtins::STRING_ADD_RIGHT, JUMP_JS); |
| 7332 | |
| 7333 | __ bind(¬_strings); |
| 7334 | } |
| 7335 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7336 | __ InvokeBuiltin(builtin, JUMP_JS); // Tail call. No return. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7337 | } |
| 7338 | |
| 7339 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7340 | // Tries to get a signed int32 out of a double precision floating point heap |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7341 | // number. Rounds towards 0. Fastest for doubles that are in the ranges |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7342 | // -0x7fffffff to -0x40000000 or 0x40000000 to 0x7fffffff. This corresponds |
| 7343 | // almost to the range of signed int32 values that are not Smis. Jumps to the |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7344 | // label 'slow' if the double isn't in the range -0x80000000.0 to 0x80000000.0 |
| 7345 | // (excluding the endpoints). |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7346 | static void GetInt32(MacroAssembler* masm, |
| 7347 | Register source, |
| 7348 | Register dest, |
| 7349 | Register scratch, |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7350 | Register scratch2, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7351 | Label* slow) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7352 | Label right_exponent, done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7353 | // Get exponent word. |
| 7354 | __ ldr(scratch, FieldMemOperand(source, HeapNumber::kExponentOffset)); |
| 7355 | // Get exponent alone in scratch2. |
| 7356 | __ and_(scratch2, scratch, Operand(HeapNumber::kExponentMask)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7357 | // Load dest with zero. We use this either for the final shift or |
| 7358 | // for the answer. |
| 7359 | __ mov(dest, Operand(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7360 | // Check whether the exponent matches a 32 bit signed int that is not a Smi. |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7361 | // A non-Smi integer is 1.xxx * 2^30 so the exponent is 30 (biased). This is |
| 7362 | // the exponent that we are fastest at and also the highest exponent we can |
| 7363 | // handle here. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7364 | const uint32_t non_smi_exponent = |
| 7365 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 7366 | __ cmp(scratch2, Operand(non_smi_exponent)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7367 | // If we have a match of the int32-but-not-Smi exponent then skip some logic. |
| 7368 | __ b(eq, &right_exponent); |
| 7369 | // If the exponent is higher than that then go to slow case. This catches |
| 7370 | // numbers that don't fit in a signed int32, infinities and NaNs. |
| 7371 | __ b(gt, slow); |
| 7372 | |
| 7373 | // We know the exponent is smaller than 30 (biased). If it is less than |
| 7374 | // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, ie |
| 7375 | // it rounds to zero. |
| 7376 | const uint32_t zero_exponent = |
| 7377 | (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift; |
| 7378 | __ sub(scratch2, scratch2, Operand(zero_exponent), SetCC); |
| 7379 | // Dest already has a Smi zero. |
| 7380 | __ b(lt, &done); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7381 | if (!CpuFeatures::IsSupported(VFP3)) { |
| 7382 | // We have a shifted exponent between 0 and 30 in scratch2. |
| 7383 | __ mov(dest, Operand(scratch2, LSR, HeapNumber::kExponentShift)); |
| 7384 | // We now have the exponent in dest. Subtract from 30 to get |
| 7385 | // how much to shift down. |
| 7386 | __ rsb(dest, dest, Operand(30)); |
| 7387 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7388 | __ bind(&right_exponent); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7389 | if (CpuFeatures::IsSupported(VFP3)) { |
| 7390 | CpuFeatures::Scope scope(VFP3); |
| 7391 | // ARMv7 VFP3 instructions implementing double precision to integer |
| 7392 | // conversion using round to zero. |
| 7393 | __ ldr(scratch2, FieldMemOperand(source, HeapNumber::kMantissaOffset)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7394 | __ vmov(d7, scratch2, scratch); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7395 | __ vcvt_s32_f64(s15, d7); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7396 | __ vmov(dest, s15); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 7397 | } else { |
| 7398 | // Get the top bits of the mantissa. |
| 7399 | __ and_(scratch2, scratch, Operand(HeapNumber::kMantissaMask)); |
| 7400 | // Put back the implicit 1. |
| 7401 | __ orr(scratch2, scratch2, Operand(1 << HeapNumber::kExponentShift)); |
| 7402 | // Shift up the mantissa bits to take up the space the exponent used to |
| 7403 | // take. We just orred in the implicit bit so that took care of one and |
| 7404 | // we want to leave the sign bit 0 so we subtract 2 bits from the shift |
| 7405 | // distance. |
| 7406 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 7407 | __ mov(scratch2, Operand(scratch2, LSL, shift_distance)); |
| 7408 | // Put sign in zero flag. |
| 7409 | __ tst(scratch, Operand(HeapNumber::kSignMask)); |
| 7410 | // Get the second half of the double. For some exponents we don't |
| 7411 | // actually need this because the bits get shifted out again, but |
| 7412 | // it's probably slower to test than just to do it. |
| 7413 | __ ldr(scratch, FieldMemOperand(source, HeapNumber::kMantissaOffset)); |
| 7414 | // Shift down 22 bits to get the last 10 bits. |
| 7415 | __ orr(scratch, scratch2, Operand(scratch, LSR, 32 - shift_distance)); |
| 7416 | // Move down according to the exponent. |
| 7417 | __ mov(dest, Operand(scratch, LSR, dest)); |
| 7418 | // Fix sign if sign bit was set. |
| 7419 | __ rsb(dest, dest, Operand(0), LeaveCC, ne); |
| 7420 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 7421 | __ bind(&done); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7422 | } |
| 7423 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7424 | // For bitwise ops where the inputs are not both Smis we here try to determine |
| 7425 | // whether both inputs are either Smis or at least heap numbers that can be |
| 7426 | // represented by a 32 bit signed value. We truncate towards zero as required |
| 7427 | // by the ES spec. If this is the case we do the bitwise op and see if the |
| 7428 | // result is a Smi. If so, great, otherwise we try to find a heap number to |
| 7429 | // write the answer into (either by allocating or by overwriting). |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7430 | // On entry the operands are in lhs and rhs. On exit the answer is in r0. |
| 7431 | void GenericBinaryOpStub::HandleNonSmiBitwiseOp(MacroAssembler* masm, |
| 7432 | Register lhs, |
| 7433 | Register rhs) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7434 | Label slow, result_not_a_smi; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7435 | Label rhs_is_smi, lhs_is_smi; |
| 7436 | Label done_checking_rhs, done_checking_lhs; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7437 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7438 | __ tst(lhs, Operand(kSmiTagMask)); |
| 7439 | __ b(eq, &lhs_is_smi); // It's a Smi so don't check it's a heap number. |
| 7440 | __ CompareObjectType(lhs, r4, r4, HEAP_NUMBER_TYPE); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7441 | __ b(ne, &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7442 | GetInt32(masm, lhs, r3, r5, r4, &slow); |
| 7443 | __ jmp(&done_checking_lhs); |
| 7444 | __ bind(&lhs_is_smi); |
| 7445 | __ mov(r3, Operand(lhs, ASR, 1)); |
| 7446 | __ bind(&done_checking_lhs); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7447 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7448 | __ tst(rhs, Operand(kSmiTagMask)); |
| 7449 | __ b(eq, &rhs_is_smi); // It's a Smi so don't check it's a heap number. |
| 7450 | __ CompareObjectType(rhs, r4, r4, HEAP_NUMBER_TYPE); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7451 | __ b(ne, &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7452 | GetInt32(masm, rhs, r2, r5, r4, &slow); |
| 7453 | __ jmp(&done_checking_rhs); |
| 7454 | __ bind(&rhs_is_smi); |
| 7455 | __ mov(r2, Operand(rhs, ASR, 1)); |
| 7456 | __ bind(&done_checking_rhs); |
| 7457 | |
| 7458 | ASSERT(((lhs.is(r0) && rhs.is(r1)) || (lhs.is(r1) && rhs.is(r0)))); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7459 | |
| 7460 | // r0 and r1: Original operands (Smi or heap numbers). |
| 7461 | // r2 and r3: Signed int32 operands. |
| 7462 | switch (op_) { |
| 7463 | case Token::BIT_OR: __ orr(r2, r2, Operand(r3)); break; |
| 7464 | case Token::BIT_XOR: __ eor(r2, r2, Operand(r3)); break; |
| 7465 | case Token::BIT_AND: __ and_(r2, r2, Operand(r3)); break; |
| 7466 | case Token::SAR: |
| 7467 | // Use only the 5 least significant bits of the shift count. |
| 7468 | __ and_(r2, r2, Operand(0x1f)); |
| 7469 | __ mov(r2, Operand(r3, ASR, r2)); |
| 7470 | break; |
| 7471 | case Token::SHR: |
| 7472 | // Use only the 5 least significant bits of the shift count. |
| 7473 | __ and_(r2, r2, Operand(0x1f)); |
| 7474 | __ mov(r2, Operand(r3, LSR, r2), SetCC); |
| 7475 | // SHR is special because it is required to produce a positive answer. |
| 7476 | // The code below for writing into heap numbers isn't capable of writing |
| 7477 | // the register as an unsigned int so we go to slow case if we hit this |
| 7478 | // case. |
| 7479 | __ b(mi, &slow); |
| 7480 | break; |
| 7481 | case Token::SHL: |
| 7482 | // Use only the 5 least significant bits of the shift count. |
| 7483 | __ and_(r2, r2, Operand(0x1f)); |
| 7484 | __ mov(r2, Operand(r3, LSL, r2)); |
| 7485 | break; |
| 7486 | default: UNREACHABLE(); |
| 7487 | } |
| 7488 | // check that the *signed* result fits in a smi |
| 7489 | __ add(r3, r2, Operand(0x40000000), SetCC); |
| 7490 | __ b(mi, &result_not_a_smi); |
| 7491 | __ mov(r0, Operand(r2, LSL, kSmiTagSize)); |
| 7492 | __ Ret(); |
| 7493 | |
| 7494 | Label have_to_allocate, got_a_heap_number; |
| 7495 | __ bind(&result_not_a_smi); |
| 7496 | switch (mode_) { |
| 7497 | case OVERWRITE_RIGHT: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7498 | __ tst(rhs, Operand(kSmiTagMask)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7499 | __ b(eq, &have_to_allocate); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7500 | __ mov(r5, Operand(rhs)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7501 | break; |
| 7502 | } |
| 7503 | case OVERWRITE_LEFT: { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7504 | __ tst(lhs, Operand(kSmiTagMask)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7505 | __ b(eq, &have_to_allocate); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7506 | __ mov(r5, Operand(lhs)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7507 | break; |
| 7508 | } |
| 7509 | case NO_OVERWRITE: { |
| 7510 | // Get a new heap number in r5. r6 and r7 are scratch. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7511 | __ AllocateHeapNumber(r5, r6, r7, &slow); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7512 | } |
| 7513 | default: break; |
| 7514 | } |
| 7515 | __ bind(&got_a_heap_number); |
| 7516 | // r2: Answer as signed int32. |
| 7517 | // r5: Heap number to write answer into. |
| 7518 | |
| 7519 | // Nothing can go wrong now, so move the heap number to r0, which is the |
| 7520 | // result. |
| 7521 | __ mov(r0, Operand(r5)); |
| 7522 | |
| 7523 | // Tail call that writes the int32 in r2 to the heap number in r0, using |
| 7524 | // r3 as scratch. r0 is preserved and returned. |
| 7525 | WriteInt32ToHeapNumberStub stub(r2, r0, r3); |
| 7526 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 7527 | |
| 7528 | if (mode_ != NO_OVERWRITE) { |
| 7529 | __ bind(&have_to_allocate); |
| 7530 | // Get a new heap number in r5. r6 and r7 are scratch. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 7531 | __ AllocateHeapNumber(r5, r6, r7, &slow); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7532 | __ jmp(&got_a_heap_number); |
| 7533 | } |
| 7534 | |
| 7535 | // If all else failed then we go to the runtime system. |
| 7536 | __ bind(&slow); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 7537 | __ Push(lhs, rhs); // Restore stack. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7538 | switch (op_) { |
| 7539 | case Token::BIT_OR: |
| 7540 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_JS); |
| 7541 | break; |
| 7542 | case Token::BIT_AND: |
| 7543 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_JS); |
| 7544 | break; |
| 7545 | case Token::BIT_XOR: |
| 7546 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_JS); |
| 7547 | break; |
| 7548 | case Token::SAR: |
| 7549 | __ InvokeBuiltin(Builtins::SAR, JUMP_JS); |
| 7550 | break; |
| 7551 | case Token::SHR: |
| 7552 | __ InvokeBuiltin(Builtins::SHR, JUMP_JS); |
| 7553 | break; |
| 7554 | case Token::SHL: |
| 7555 | __ InvokeBuiltin(Builtins::SHL, JUMP_JS); |
| 7556 | break; |
| 7557 | default: |
| 7558 | UNREACHABLE(); |
| 7559 | } |
| 7560 | } |
| 7561 | |
| 7562 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7563 | // Can we multiply by x with max two shifts and an add. |
| 7564 | // This answers yes to all integers from 2 to 10. |
| 7565 | static bool IsEasyToMultiplyBy(int x) { |
| 7566 | if (x < 2) return false; // Avoid special cases. |
| 7567 | if (x > (Smi::kMaxValue + 1) >> 2) return false; // Almost always overflows. |
| 7568 | if (IsPowerOf2(x)) return true; // Simple shift. |
| 7569 | if (PopCountLessThanEqual2(x)) return true; // Shift and add and shift. |
| 7570 | if (IsPowerOf2(x + 1)) return true; // Patterns like 11111. |
| 7571 | return false; |
| 7572 | } |
| 7573 | |
| 7574 | |
| 7575 | // Can multiply by anything that IsEasyToMultiplyBy returns true for. |
| 7576 | // Source and destination may be the same register. This routine does |
| 7577 | // not set carry and overflow the way a mul instruction would. |
| 7578 | static void MultiplyByKnownInt(MacroAssembler* masm, |
| 7579 | Register source, |
| 7580 | Register destination, |
| 7581 | int known_int) { |
| 7582 | if (IsPowerOf2(known_int)) { |
| 7583 | __ mov(destination, Operand(source, LSL, BitPosition(known_int))); |
| 7584 | } else if (PopCountLessThanEqual2(known_int)) { |
| 7585 | int first_bit = BitPosition(known_int); |
| 7586 | int second_bit = BitPosition(known_int ^ (1 << first_bit)); |
| 7587 | __ add(destination, source, Operand(source, LSL, second_bit - first_bit)); |
| 7588 | if (first_bit != 0) { |
| 7589 | __ mov(destination, Operand(destination, LSL, first_bit)); |
| 7590 | } |
| 7591 | } else { |
| 7592 | ASSERT(IsPowerOf2(known_int + 1)); // Patterns like 1111. |
| 7593 | int the_bit = BitPosition(known_int + 1); |
| 7594 | __ rsb(destination, source, Operand(source, LSL, the_bit)); |
| 7595 | } |
| 7596 | } |
| 7597 | |
| 7598 | |
| 7599 | // This function (as opposed to MultiplyByKnownInt) takes the known int in a |
| 7600 | // a register for the cases where it doesn't know a good trick, and may deliver |
| 7601 | // a result that needs shifting. |
| 7602 | static void MultiplyByKnownInt2( |
| 7603 | MacroAssembler* masm, |
| 7604 | Register result, |
| 7605 | Register source, |
| 7606 | Register known_int_register, // Smi tagged. |
| 7607 | int known_int, |
| 7608 | int* required_shift) { // Including Smi tag shift |
| 7609 | switch (known_int) { |
| 7610 | case 3: |
| 7611 | __ add(result, source, Operand(source, LSL, 1)); |
| 7612 | *required_shift = 1; |
| 7613 | break; |
| 7614 | case 5: |
| 7615 | __ add(result, source, Operand(source, LSL, 2)); |
| 7616 | *required_shift = 1; |
| 7617 | break; |
| 7618 | case 6: |
| 7619 | __ add(result, source, Operand(source, LSL, 1)); |
| 7620 | *required_shift = 2; |
| 7621 | break; |
| 7622 | case 7: |
| 7623 | __ rsb(result, source, Operand(source, LSL, 3)); |
| 7624 | *required_shift = 1; |
| 7625 | break; |
| 7626 | case 9: |
| 7627 | __ add(result, source, Operand(source, LSL, 3)); |
| 7628 | *required_shift = 1; |
| 7629 | break; |
| 7630 | case 10: |
| 7631 | __ add(result, source, Operand(source, LSL, 2)); |
| 7632 | *required_shift = 2; |
| 7633 | break; |
| 7634 | default: |
| 7635 | ASSERT(!IsPowerOf2(known_int)); // That would be very inefficient. |
| 7636 | __ mul(result, source, known_int_register); |
| 7637 | *required_shift = 0; |
| 7638 | } |
| 7639 | } |
| 7640 | |
| 7641 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 7642 | const char* GenericBinaryOpStub::GetName() { |
| 7643 | if (name_ != NULL) return name_; |
| 7644 | const int len = 100; |
| 7645 | name_ = Bootstrapper::AllocateAutoDeletedArray(len); |
| 7646 | if (name_ == NULL) return "OOM"; |
| 7647 | const char* op_name = Token::Name(op_); |
| 7648 | const char* overwrite_name; |
| 7649 | switch (mode_) { |
| 7650 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 7651 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 7652 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 7653 | default: overwrite_name = "UnknownOverwrite"; break; |
| 7654 | } |
| 7655 | |
| 7656 | OS::SNPrintF(Vector<char>(name_, len), |
| 7657 | "GenericBinaryOpStub_%s_%s%s", |
| 7658 | op_name, |
| 7659 | overwrite_name, |
| 7660 | specialized_on_rhs_ ? "_ConstantRhs" : 0); |
| 7661 | return name_; |
| 7662 | } |
| 7663 | |
| 7664 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 7665 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7666 | void GenericBinaryOpStub::Generate(MacroAssembler* masm) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7667 | // lhs_ : x |
| 7668 | // rhs_ : y |
| 7669 | // r0 : result |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7670 | |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7671 | Register result = r0; |
| 7672 | Register lhs = lhs_; |
| 7673 | Register rhs = rhs_; |
| 7674 | |
| 7675 | // This code can't cope with other register allocations yet. |
| 7676 | ASSERT(result.is(r0) && |
| 7677 | ((lhs.is(r0) && rhs.is(r1)) || |
| 7678 | (lhs.is(r1) && rhs.is(r0)))); |
| 7679 | |
| 7680 | Register smi_test_reg = VirtualFrame::scratch0(); |
| 7681 | Register scratch = VirtualFrame::scratch1(); |
| 7682 | |
| 7683 | // All ops need to know whether we are dealing with two Smis. Set up |
| 7684 | // smi_test_reg to tell us that. |
| 7685 | if (ShouldGenerateSmiCode()) { |
| 7686 | __ orr(smi_test_reg, lhs, Operand(rhs)); |
| 7687 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7688 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7689 | switch (op_) { |
| 7690 | case Token::ADD: { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7691 | Label not_smi; |
| 7692 | // Fast path. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7693 | if (ShouldGenerateSmiCode()) { |
| 7694 | ASSERT(kSmiTag == 0); // Adjust code below. |
| 7695 | __ tst(smi_test_reg, Operand(kSmiTagMask)); |
| 7696 | __ b(ne, ¬_smi); |
| 7697 | __ add(r0, r1, Operand(r0), SetCC); // Add y optimistically. |
| 7698 | // Return if no overflow. |
| 7699 | __ Ret(vc); |
| 7700 | __ sub(r0, r0, Operand(r1)); // Revert optimistic add. |
| 7701 | } |
| 7702 | HandleBinaryOpSlowCases(masm, ¬_smi, lhs, rhs, Builtins::ADD); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7703 | break; |
| 7704 | } |
| 7705 | |
| 7706 | case Token::SUB: { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7707 | Label not_smi; |
| 7708 | // Fast path. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7709 | if (ShouldGenerateSmiCode()) { |
| 7710 | ASSERT(kSmiTag == 0); // Adjust code below. |
| 7711 | __ tst(smi_test_reg, Operand(kSmiTagMask)); |
| 7712 | __ b(ne, ¬_smi); |
| 7713 | if (lhs.is(r1)) { |
| 7714 | __ sub(r0, r1, Operand(r0), SetCC); // Subtract y optimistically. |
| 7715 | // Return if no overflow. |
| 7716 | __ Ret(vc); |
| 7717 | __ sub(r0, r1, Operand(r0)); // Revert optimistic subtract. |
| 7718 | } else { |
| 7719 | __ sub(r0, r0, Operand(r1), SetCC); // Subtract y optimistically. |
| 7720 | // Return if no overflow. |
| 7721 | __ Ret(vc); |
| 7722 | __ add(r0, r0, Operand(r1)); // Revert optimistic subtract. |
| 7723 | } |
| 7724 | } |
| 7725 | HandleBinaryOpSlowCases(masm, ¬_smi, lhs, rhs, Builtins::SUB); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7726 | break; |
| 7727 | } |
| 7728 | |
| 7729 | case Token::MUL: { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7730 | Label not_smi, slow; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7731 | if (ShouldGenerateSmiCode()) { |
| 7732 | ASSERT(kSmiTag == 0); // adjust code below |
| 7733 | __ tst(smi_test_reg, Operand(kSmiTagMask)); |
| 7734 | Register scratch2 = smi_test_reg; |
| 7735 | smi_test_reg = no_reg; |
| 7736 | __ b(ne, ¬_smi); |
| 7737 | // Remove tag from one operand (but keep sign), so that result is Smi. |
| 7738 | __ mov(ip, Operand(rhs, ASR, kSmiTagSize)); |
| 7739 | // Do multiplication |
| 7740 | // scratch = lower 32 bits of ip * lhs. |
| 7741 | __ smull(scratch, scratch2, lhs, ip); |
| 7742 | // Go slow on overflows (overflow bit is not set). |
| 7743 | __ mov(ip, Operand(scratch, ASR, 31)); |
| 7744 | // No overflow if higher 33 bits are identical. |
| 7745 | __ cmp(ip, Operand(scratch2)); |
| 7746 | __ b(ne, &slow); |
| 7747 | // Go slow on zero result to handle -0. |
| 7748 | __ tst(scratch, Operand(scratch)); |
| 7749 | __ mov(result, Operand(scratch), LeaveCC, ne); |
| 7750 | __ Ret(ne); |
| 7751 | // We need -0 if we were multiplying a negative number with 0 to get 0. |
| 7752 | // We know one of them was zero. |
| 7753 | __ add(scratch2, rhs, Operand(lhs), SetCC); |
| 7754 | __ mov(result, Operand(Smi::FromInt(0)), LeaveCC, pl); |
| 7755 | __ Ret(pl); // Return Smi 0 if the non-zero one was positive. |
| 7756 | // Slow case. We fall through here if we multiplied a negative number |
| 7757 | // with 0, because that would mean we should produce -0. |
| 7758 | __ bind(&slow); |
| 7759 | } |
| 7760 | HandleBinaryOpSlowCases(masm, ¬_smi, lhs, rhs, Builtins::MUL); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7761 | break; |
| 7762 | } |
| 7763 | |
| 7764 | case Token::DIV: |
| 7765 | case Token::MOD: { |
| 7766 | Label not_smi; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7767 | if (ShouldGenerateSmiCode() && specialized_on_rhs_) { |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7768 | Label smi_is_unsuitable; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7769 | __ BranchOnNotSmi(lhs, ¬_smi); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7770 | if (IsPowerOf2(constant_rhs_)) { |
| 7771 | if (op_ == Token::MOD) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7772 | __ and_(rhs, |
| 7773 | lhs, |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7774 | Operand(0x80000000u | ((constant_rhs_ << kSmiTagSize) - 1)), |
| 7775 | SetCC); |
| 7776 | // We now have the answer, but if the input was negative we also |
| 7777 | // have the sign bit. Our work is done if the result is |
| 7778 | // positive or zero: |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7779 | if (!rhs.is(r0)) { |
| 7780 | __ mov(r0, rhs, LeaveCC, pl); |
| 7781 | } |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7782 | __ Ret(pl); |
| 7783 | // A mod of a negative left hand side must return a negative number. |
| 7784 | // Unfortunately if the answer is 0 then we must return -0. And we |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7785 | // already optimistically trashed rhs so we may need to restore it. |
| 7786 | __ eor(rhs, rhs, Operand(0x80000000u), SetCC); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7787 | // Next two instructions are conditional on the answer being -0. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7788 | __ mov(rhs, Operand(Smi::FromInt(constant_rhs_)), LeaveCC, eq); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7789 | __ b(eq, &smi_is_unsuitable); |
| 7790 | // We need to subtract the dividend. Eg. -3 % 4 == -3. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7791 | __ sub(result, rhs, Operand(Smi::FromInt(constant_rhs_))); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7792 | } else { |
| 7793 | ASSERT(op_ == Token::DIV); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7794 | __ tst(lhs, |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7795 | Operand(0x80000000u | ((constant_rhs_ << kSmiTagSize) - 1))); |
| 7796 | __ b(ne, &smi_is_unsuitable); // Go slow on negative or remainder. |
| 7797 | int shift = 0; |
| 7798 | int d = constant_rhs_; |
| 7799 | while ((d & 1) == 0) { |
| 7800 | d >>= 1; |
| 7801 | shift++; |
| 7802 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7803 | __ mov(r0, Operand(lhs, LSR, shift)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7804 | __ bic(r0, r0, Operand(kSmiTagMask)); |
| 7805 | } |
| 7806 | } else { |
| 7807 | // Not a power of 2. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7808 | __ tst(lhs, Operand(0x80000000u)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7809 | __ b(ne, &smi_is_unsuitable); |
| 7810 | // Find a fixed point reciprocal of the divisor so we can divide by |
| 7811 | // multiplying. |
| 7812 | double divisor = 1.0 / constant_rhs_; |
| 7813 | int shift = 32; |
| 7814 | double scale = 4294967296.0; // 1 << 32. |
| 7815 | uint32_t mul; |
| 7816 | // Maximise the precision of the fixed point reciprocal. |
| 7817 | while (true) { |
| 7818 | mul = static_cast<uint32_t>(scale * divisor); |
| 7819 | if (mul >= 0x7fffffff) break; |
| 7820 | scale *= 2.0; |
| 7821 | shift++; |
| 7822 | } |
| 7823 | mul++; |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7824 | Register scratch2 = smi_test_reg; |
| 7825 | smi_test_reg = no_reg; |
| 7826 | __ mov(scratch2, Operand(mul)); |
| 7827 | __ umull(scratch, scratch2, scratch2, lhs); |
| 7828 | __ mov(scratch2, Operand(scratch2, LSR, shift - 31)); |
| 7829 | // scratch2 is lhs / rhs. scratch2 is not Smi tagged. |
| 7830 | // rhs is still the known rhs. rhs is Smi tagged. |
| 7831 | // lhs is still the unkown lhs. lhs is Smi tagged. |
| 7832 | int required_scratch_shift = 0; // Including the Smi tag shift of 1. |
| 7833 | // scratch = scratch2 * rhs. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7834 | MultiplyByKnownInt2(masm, |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7835 | scratch, |
| 7836 | scratch2, |
| 7837 | rhs, |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7838 | constant_rhs_, |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7839 | &required_scratch_shift); |
| 7840 | // scratch << required_scratch_shift is now the Smi tagged rhs * |
| 7841 | // (lhs / rhs) where / indicates integer division. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7842 | if (op_ == Token::DIV) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7843 | __ cmp(lhs, Operand(scratch, LSL, required_scratch_shift)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7844 | __ b(ne, &smi_is_unsuitable); // There was a remainder. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7845 | __ mov(result, Operand(scratch2, LSL, kSmiTagSize)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7846 | } else { |
| 7847 | ASSERT(op_ == Token::MOD); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7848 | __ sub(result, lhs, Operand(scratch, LSL, required_scratch_shift)); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7849 | } |
| 7850 | } |
| 7851 | __ Ret(); |
| 7852 | __ bind(&smi_is_unsuitable); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 7853 | } |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7854 | HandleBinaryOpSlowCases( |
| 7855 | masm, |
| 7856 | ¬_smi, |
| 7857 | lhs, |
| 7858 | rhs, |
| 7859 | op_ == Token::MOD ? Builtins::MOD : Builtins::DIV); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7860 | break; |
| 7861 | } |
| 7862 | |
| 7863 | case Token::BIT_OR: |
| 7864 | case Token::BIT_AND: |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7865 | case Token::BIT_XOR: |
| 7866 | case Token::SAR: |
| 7867 | case Token::SHR: |
| 7868 | case Token::SHL: { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7869 | Label slow; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7870 | ASSERT(kSmiTag == 0); // adjust code below |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7871 | __ tst(smi_test_reg, Operand(kSmiTagMask)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7872 | __ b(ne, &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7873 | Register scratch2 = smi_test_reg; |
| 7874 | smi_test_reg = no_reg; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7875 | switch (op_) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7876 | case Token::BIT_OR: __ orr(result, rhs, Operand(lhs)); break; |
| 7877 | case Token::BIT_AND: __ and_(result, rhs, Operand(lhs)); break; |
| 7878 | case Token::BIT_XOR: __ eor(result, rhs, Operand(lhs)); break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7879 | case Token::SAR: |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7880 | // Remove tags from right operand. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7881 | __ GetLeastBitsFromSmi(scratch2, rhs, 5); |
| 7882 | __ mov(result, Operand(lhs, ASR, scratch2)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7883 | // Smi tag result. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7884 | __ bic(result, result, Operand(kSmiTagMask)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7885 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7886 | case Token::SHR: |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7887 | // Remove tags from operands. We can't do this on a 31 bit number |
| 7888 | // because then the 0s get shifted into bit 30 instead of bit 31. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7889 | __ mov(scratch, Operand(lhs, ASR, kSmiTagSize)); // x |
| 7890 | __ GetLeastBitsFromSmi(scratch2, rhs, 5); |
| 7891 | __ mov(scratch, Operand(scratch, LSR, scratch2)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7892 | // Unsigned shift is not allowed to produce a negative number, so |
| 7893 | // check the sign bit and the sign bit after Smi tagging. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7894 | __ tst(scratch, Operand(0xc0000000)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7895 | __ b(ne, &slow); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7896 | // Smi tag result. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7897 | __ mov(result, Operand(scratch, LSL, kSmiTagSize)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7898 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7899 | case Token::SHL: |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7900 | // Remove tags from operands. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7901 | __ mov(scratch, Operand(lhs, ASR, kSmiTagSize)); // x |
| 7902 | __ GetLeastBitsFromSmi(scratch2, rhs, 5); |
| 7903 | __ mov(scratch, Operand(scratch, LSL, scratch2)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 7904 | // Check that the signed result fits in a Smi. |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7905 | __ add(scratch2, scratch, Operand(0x40000000), SetCC); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7906 | __ b(mi, &slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7907 | __ mov(result, Operand(scratch, LSL, kSmiTagSize)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7908 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7909 | default: UNREACHABLE(); |
| 7910 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7911 | __ Ret(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7912 | __ bind(&slow); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7913 | HandleNonSmiBitwiseOp(masm, lhs, rhs); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7914 | break; |
| 7915 | } |
| 7916 | |
| 7917 | default: UNREACHABLE(); |
| 7918 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 7919 | // This code should be unreachable. |
| 7920 | __ stop("Unreachable"); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7921 | |
| 7922 | // Generate an unreachable reference to the DEFAULT stub so that it can be |
| 7923 | // found at the end of this stub when clearing ICs at GC. |
| 7924 | // TODO(kaznacheev): Check performance impact and get rid of this. |
| 7925 | if (runtime_operands_type_ != BinaryOpIC::DEFAULT) { |
| 7926 | GenericBinaryOpStub uninit(MinorKey(), BinaryOpIC::DEFAULT); |
| 7927 | __ CallStub(&uninit); |
| 7928 | } |
| 7929 | } |
| 7930 | |
| 7931 | |
| 7932 | void GenericBinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
| 7933 | Label get_result; |
| 7934 | |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 7935 | __ Push(r1, r0); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7936 | |
| 7937 | // Internal frame is necessary to handle exceptions properly. |
| 7938 | __ EnterInternalFrame(); |
| 7939 | // Call the stub proper to get the result in r0. |
| 7940 | __ Call(&get_result); |
| 7941 | __ LeaveInternalFrame(); |
| 7942 | |
| 7943 | __ push(r0); |
| 7944 | |
| 7945 | __ mov(r0, Operand(Smi::FromInt(MinorKey()))); |
| 7946 | __ push(r0); |
| 7947 | __ mov(r0, Operand(Smi::FromInt(op_))); |
| 7948 | __ push(r0); |
| 7949 | __ mov(r0, Operand(Smi::FromInt(runtime_operands_type_))); |
| 7950 | __ push(r0); |
| 7951 | |
| 7952 | __ TailCallExternalReference( |
| 7953 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch)), |
| 7954 | 6, |
| 7955 | 1); |
| 7956 | |
| 7957 | // The entry point for the result calculation is assumed to be immediately |
| 7958 | // after this sequence. |
| 7959 | __ bind(&get_result); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7960 | } |
| 7961 | |
| 7962 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7963 | Handle<Code> GetBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info) { |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 7964 | GenericBinaryOpStub stub(key, type_info); |
| 7965 | return stub.GetCode(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7966 | } |
| 7967 | |
| 7968 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7969 | void StackCheckStub::Generate(MacroAssembler* masm) { |
ager@chromium.org | 3a37e9b | 2009-04-27 09:26:21 +0000 | [diff] [blame] | 7970 | // Do tail-call to runtime routine. Runtime routines expect at least one |
| 7971 | // argument, so give it a Smi. |
| 7972 | __ mov(r0, Operand(Smi::FromInt(0))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7973 | __ push(r0); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 7974 | __ TailCallRuntime(Runtime::kStackGuard, 1, 1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7975 | |
| 7976 | __ StubReturn(1); |
| 7977 | } |
| 7978 | |
| 7979 | |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 7980 | void GenericUnaryOpStub::Generate(MacroAssembler* masm) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7981 | Label slow, done; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 7982 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7983 | if (op_ == Token::SUB) { |
| 7984 | // Check whether the value is a smi. |
| 7985 | Label try_float; |
| 7986 | __ tst(r0, Operand(kSmiTagMask)); |
| 7987 | __ b(ne, &try_float); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7988 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7989 | // Go slow case if the value of the expression is zero |
| 7990 | // to make sure that we switch between 0 and -0. |
| 7991 | __ cmp(r0, Operand(0)); |
| 7992 | __ b(eq, &slow); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7993 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7994 | // The value of the expression is a smi that is not zero. Try |
| 7995 | // optimistic subtraction '0 - value'. |
| 7996 | __ rsb(r1, r0, Operand(0), SetCC); |
| 7997 | __ b(vs, &slow); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 7998 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 7999 | __ mov(r0, Operand(r1)); // Set r0 to result. |
| 8000 | __ b(&done); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8001 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8002 | __ bind(&try_float); |
| 8003 | __ CompareObjectType(r0, r1, r1, HEAP_NUMBER_TYPE); |
| 8004 | __ b(ne, &slow); |
| 8005 | // r0 is a heap number. Get a new heap number in r1. |
| 8006 | if (overwrite_) { |
| 8007 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 8008 | __ eor(r2, r2, Operand(HeapNumber::kSignMask)); // Flip sign. |
| 8009 | __ str(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 8010 | } else { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 8011 | __ AllocateHeapNumber(r1, r2, r3, &slow); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8012 | __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| 8013 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 8014 | __ str(r3, FieldMemOperand(r1, HeapNumber::kMantissaOffset)); |
| 8015 | __ eor(r2, r2, Operand(HeapNumber::kSignMask)); // Flip sign. |
| 8016 | __ str(r2, FieldMemOperand(r1, HeapNumber::kExponentOffset)); |
| 8017 | __ mov(r0, Operand(r1)); |
| 8018 | } |
| 8019 | } else if (op_ == Token::BIT_NOT) { |
| 8020 | // Check if the operand is a heap number. |
| 8021 | __ CompareObjectType(r0, r1, r1, HEAP_NUMBER_TYPE); |
| 8022 | __ b(ne, &slow); |
| 8023 | |
| 8024 | // Convert the heap number is r0 to an untagged integer in r1. |
| 8025 | GetInt32(masm, r0, r1, r2, r3, &slow); |
| 8026 | |
| 8027 | // Do the bitwise operation (move negated) and check if the result |
| 8028 | // fits in a smi. |
| 8029 | Label try_float; |
| 8030 | __ mvn(r1, Operand(r1)); |
| 8031 | __ add(r2, r1, Operand(0x40000000), SetCC); |
| 8032 | __ b(mi, &try_float); |
| 8033 | __ mov(r0, Operand(r1, LSL, kSmiTagSize)); |
| 8034 | __ b(&done); |
| 8035 | |
| 8036 | __ bind(&try_float); |
| 8037 | if (!overwrite_) { |
| 8038 | // Allocate a fresh heap number, but don't overwrite r0 until |
| 8039 | // we're sure we can do it without going through the slow case |
| 8040 | // that needs the value in r0. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 8041 | __ AllocateHeapNumber(r2, r3, r4, &slow); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8042 | __ mov(r0, Operand(r2)); |
| 8043 | } |
| 8044 | |
| 8045 | // WriteInt32ToHeapNumberStub does not trigger GC, so we do not |
| 8046 | // have to set up a frame. |
| 8047 | WriteInt32ToHeapNumberStub stub(r1, r0, r2); |
| 8048 | __ push(lr); |
| 8049 | __ Call(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 8050 | __ pop(lr); |
| 8051 | } else { |
| 8052 | UNIMPLEMENTED(); |
| 8053 | } |
| 8054 | |
| 8055 | __ bind(&done); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8056 | __ StubReturn(1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8057 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8058 | // Handle the slow case by jumping to the JavaScript builtin. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8059 | __ bind(&slow); |
| 8060 | __ push(r0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8061 | switch (op_) { |
| 8062 | case Token::SUB: |
| 8063 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_JS); |
| 8064 | break; |
| 8065 | case Token::BIT_NOT: |
| 8066 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_JS); |
| 8067 | break; |
| 8068 | default: |
| 8069 | UNREACHABLE(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8070 | } |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 8071 | } |
| 8072 | |
| 8073 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8074 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8075 | // r0 holds the exception. |
| 8076 | |
| 8077 | // Adjust this code if not the case. |
| 8078 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 8079 | |
| 8080 | // Drop the sp to the top of the handler. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8081 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
| 8082 | __ ldr(sp, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8083 | |
| 8084 | // Restore the next handler and frame pointer, discard handler state. |
| 8085 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 8086 | __ pop(r2); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8087 | __ str(r2, MemOperand(r3)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8088 | ASSERT(StackHandlerConstants::kFPOffset == 2 * kPointerSize); |
| 8089 | __ ldm(ia_w, sp, r3.bit() | fp.bit()); // r3: discarded state. |
| 8090 | |
| 8091 | // Before returning we restore the context from the frame pointer if |
| 8092 | // not NULL. The frame pointer is NULL in the exception handler of a |
| 8093 | // JS entry frame. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8094 | __ cmp(fp, Operand(0)); |
| 8095 | // Set cp to NULL if fp is NULL. |
| 8096 | __ mov(cp, Operand(0), LeaveCC, eq); |
| 8097 | // Restore cp otherwise. |
| 8098 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8099 | #ifdef DEBUG |
| 8100 | if (FLAG_debug_code) { |
| 8101 | __ mov(lr, Operand(pc)); |
| 8102 | } |
| 8103 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8104 | ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8105 | __ pop(pc); |
| 8106 | } |
| 8107 | |
| 8108 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8109 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 8110 | UncatchableExceptionType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8111 | // Adjust this code if not the case. |
| 8112 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 8113 | |
| 8114 | // Drop sp to the top stack handler. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8115 | __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8116 | __ ldr(sp, MemOperand(r3)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8117 | |
| 8118 | // Unwind the handlers until the ENTRY handler is found. |
| 8119 | Label loop, done; |
| 8120 | __ bind(&loop); |
| 8121 | // Load the type of the current stack handler. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8122 | const int kStateOffset = StackHandlerConstants::kStateOffset; |
| 8123 | __ ldr(r2, MemOperand(sp, kStateOffset)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8124 | __ cmp(r2, Operand(StackHandler::ENTRY)); |
| 8125 | __ b(eq, &done); |
| 8126 | // Fetch the next handler in the list. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8127 | const int kNextOffset = StackHandlerConstants::kNextOffset; |
| 8128 | __ ldr(sp, MemOperand(sp, kNextOffset)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8129 | __ jmp(&loop); |
| 8130 | __ bind(&done); |
| 8131 | |
| 8132 | // 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] | 8133 | ASSERT(StackHandlerConstants::kNextOffset == 0); |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8134 | __ pop(r2); |
| 8135 | __ str(r2, MemOperand(r3)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8136 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8137 | if (type == OUT_OF_MEMORY) { |
| 8138 | // Set external caught exception to false. |
| 8139 | ExternalReference external_caught(Top::k_external_caught_exception_address); |
| 8140 | __ mov(r0, Operand(false)); |
| 8141 | __ mov(r2, Operand(external_caught)); |
| 8142 | __ str(r0, MemOperand(r2)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8143 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8144 | // Set pending exception and r0 to out of memory exception. |
| 8145 | Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 8146 | __ mov(r0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 8147 | __ mov(r2, Operand(ExternalReference(Top::k_pending_exception_address))); |
| 8148 | __ str(r0, MemOperand(r2)); |
| 8149 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8150 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8151 | // Stack layout at this point. See also StackHandlerConstants. |
| 8152 | // sp -> state (ENTRY) |
| 8153 | // fp |
| 8154 | // lr |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8155 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8156 | // Discard handler state (r2 is not used) and restore frame pointer. |
| 8157 | ASSERT(StackHandlerConstants::kFPOffset == 2 * kPointerSize); |
| 8158 | __ ldm(ia_w, sp, r2.bit() | fp.bit()); // r2: discarded state. |
| 8159 | // Before returning we restore the context from the frame pointer if |
| 8160 | // not NULL. The frame pointer is NULL in the exception handler of a |
| 8161 | // JS entry frame. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8162 | __ cmp(fp, Operand(0)); |
| 8163 | // Set cp to NULL if fp is NULL. |
| 8164 | __ mov(cp, Operand(0), LeaveCC, eq); |
| 8165 | // Restore cp otherwise. |
| 8166 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8167 | #ifdef DEBUG |
| 8168 | if (FLAG_debug_code) { |
| 8169 | __ mov(lr, Operand(pc)); |
| 8170 | } |
| 8171 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8172 | ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8173 | __ pop(pc); |
| 8174 | } |
| 8175 | |
| 8176 | |
| 8177 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 8178 | Label* throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8179 | Label* throw_termination_exception, |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8180 | Label* throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8181 | bool do_gc, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8182 | bool always_allocate, |
| 8183 | int frame_alignment_skew) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8184 | // r0: result parameter for PerformGC, if any |
| 8185 | // r4: number of arguments including receiver (C callee-saved) |
| 8186 | // r5: pointer to builtin function (C callee-saved) |
| 8187 | // r6: pointer to the first argument (C callee-saved) |
| 8188 | |
| 8189 | if (do_gc) { |
| 8190 | // Passing r0. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8191 | __ PrepareCallCFunction(1, r1); |
| 8192 | __ CallCFunction(ExternalReference::perform_gc_function(), 1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8193 | } |
| 8194 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8195 | ExternalReference scope_depth = |
| 8196 | ExternalReference::heap_always_allocate_scope_depth(); |
| 8197 | if (always_allocate) { |
| 8198 | __ mov(r0, Operand(scope_depth)); |
| 8199 | __ ldr(r1, MemOperand(r0)); |
| 8200 | __ add(r1, r1, Operand(1)); |
| 8201 | __ str(r1, MemOperand(r0)); |
| 8202 | } |
| 8203 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8204 | // Call C built-in. |
| 8205 | // r0 = argc, r1 = argv |
| 8206 | __ mov(r0, Operand(r4)); |
| 8207 | __ mov(r1, Operand(r6)); |
| 8208 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8209 | int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 8210 | int frame_alignment_mask = frame_alignment - 1; |
| 8211 | #if defined(V8_HOST_ARCH_ARM) |
| 8212 | if (FLAG_debug_code) { |
| 8213 | if (frame_alignment > kPointerSize) { |
| 8214 | Label alignment_as_expected; |
| 8215 | ASSERT(IsPowerOf2(frame_alignment)); |
| 8216 | __ sub(r2, sp, Operand(frame_alignment_skew)); |
| 8217 | __ tst(r2, Operand(frame_alignment_mask)); |
| 8218 | __ b(eq, &alignment_as_expected); |
| 8219 | // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| 8220 | __ stop("Unexpected alignment"); |
| 8221 | __ bind(&alignment_as_expected); |
| 8222 | } |
| 8223 | } |
| 8224 | #endif |
| 8225 | |
| 8226 | // Just before the call (jump) below lr is pushed, so the actual alignment is |
| 8227 | // adding one to the current skew. |
| 8228 | int alignment_before_call = |
| 8229 | (frame_alignment_skew + kPointerSize) & frame_alignment_mask; |
| 8230 | if (alignment_before_call > 0) { |
| 8231 | // Push until the alignment before the call is met. |
| 8232 | __ mov(r2, Operand(0)); |
| 8233 | for (int i = alignment_before_call; |
| 8234 | (i & frame_alignment_mask) != 0; |
| 8235 | i += kPointerSize) { |
| 8236 | __ push(r2); |
| 8237 | } |
| 8238 | } |
| 8239 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8240 | // TODO(1242173): To let the GC traverse the return address of the exit |
| 8241 | // frames, we need to know where the return address is. Right now, |
| 8242 | // we push it on the stack to be able to find it again, but we never |
| 8243 | // restore from it in case of changes, which makes it impossible to |
| 8244 | // support moving the C entry code stub. This should be fixed, but currently |
| 8245 | // this is OK because the CEntryStub gets generated so early in the V8 boot |
| 8246 | // sequence that it is not moving ever. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8247 | masm->add(lr, pc, Operand(4)); // Compute return address: (pc + 8) + 4 |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 8248 | masm->push(lr); |
| 8249 | masm->Jump(r5); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8250 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8251 | // Restore sp back to before aligning the stack. |
| 8252 | if (alignment_before_call > 0) { |
| 8253 | __ add(sp, sp, Operand(alignment_before_call)); |
| 8254 | } |
| 8255 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8256 | if (always_allocate) { |
| 8257 | // It's okay to clobber r2 and r3 here. Don't mess with r0 and r1 |
| 8258 | // though (contain the result). |
| 8259 | __ mov(r2, Operand(scope_depth)); |
| 8260 | __ ldr(r3, MemOperand(r2)); |
| 8261 | __ sub(r3, r3, Operand(1)); |
| 8262 | __ str(r3, MemOperand(r2)); |
| 8263 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8264 | |
| 8265 | // check for failure result |
| 8266 | Label failure_returned; |
| 8267 | ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 8268 | // Lower 2 bits of r2 are 0 iff r0 has failure tag. |
| 8269 | __ add(r2, r0, Operand(1)); |
| 8270 | __ tst(r2, Operand(kFailureTagMask)); |
| 8271 | __ b(eq, &failure_returned); |
| 8272 | |
| 8273 | // Exit C frame and return. |
| 8274 | // r0:r1: result |
| 8275 | // sp: stack pointer |
| 8276 | // fp: frame pointer |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8277 | __ LeaveExitFrame(mode_); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8278 | |
| 8279 | // check if we should retry or throw exception |
| 8280 | Label retry; |
| 8281 | __ bind(&failure_returned); |
| 8282 | ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 8283 | __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 8284 | __ b(eq, &retry); |
| 8285 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8286 | // Special handling of out of memory exceptions. |
| 8287 | Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 8288 | __ cmp(r0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 8289 | __ b(eq, throw_out_of_memory_exception); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8290 | |
| 8291 | // Retrieve the pending exception and clear the variable. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 8292 | __ mov(ip, Operand(ExternalReference::the_hole_value_location())); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8293 | __ ldr(r3, MemOperand(ip)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 8294 | __ mov(ip, Operand(ExternalReference(Top::k_pending_exception_address))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8295 | __ ldr(r0, MemOperand(ip)); |
| 8296 | __ str(r3, MemOperand(ip)); |
| 8297 | |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8298 | // Special handling of termination exceptions which are uncatchable |
| 8299 | // by javascript code. |
| 8300 | __ cmp(r0, Operand(Factory::termination_exception())); |
| 8301 | __ b(eq, throw_termination_exception); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8302 | |
| 8303 | // Handle normal exception. |
| 8304 | __ jmp(throw_normal_exception); |
| 8305 | |
| 8306 | __ bind(&retry); // pass last failure (r0) as parameter (r0) when retrying |
| 8307 | } |
| 8308 | |
| 8309 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8310 | void CEntryStub::Generate(MacroAssembler* masm) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8311 | // Called from JavaScript; parameters are on stack as if calling JS function |
| 8312 | // r0: number of arguments including receiver |
| 8313 | // r1: pointer to builtin function |
| 8314 | // fp: frame pointer (restored after C call) |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8315 | // sp: stack pointer (restored as callee's sp after C call) |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8316 | // cp: current context (C callee-saved) |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8317 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8318 | // Result returned in r0 or r0+r1 by default. |
| 8319 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8320 | // NOTE: Invocations of builtins may return failure objects |
| 8321 | // instead of a proper result. The builtin entry handles |
| 8322 | // this by performing a garbage collection and retrying the |
| 8323 | // builtin once. |
| 8324 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8325 | // Enter the exit frame that transitions from JavaScript to C++. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 8326 | __ EnterExitFrame(mode_); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8327 | |
| 8328 | // r4: number of arguments (C callee-saved) |
| 8329 | // r5: pointer to builtin function (C callee-saved) |
| 8330 | // r6: pointer to first argument (C callee-saved) |
| 8331 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8332 | Label throw_normal_exception; |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8333 | Label throw_termination_exception; |
| 8334 | Label throw_out_of_memory_exception; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8335 | |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 8336 | // Call into the runtime system. |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8337 | GenerateCore(masm, |
| 8338 | &throw_normal_exception, |
| 8339 | &throw_termination_exception, |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8340 | &throw_out_of_memory_exception, |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 8341 | false, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8342 | false, |
| 8343 | -kPointerSize); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8344 | |
| 8345 | // Do space-specific GC and retry runtime call. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8346 | GenerateCore(masm, |
| 8347 | &throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8348 | &throw_termination_exception, |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8349 | &throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8350 | true, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8351 | false, |
| 8352 | 0); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8353 | |
| 8354 | // Do full GC and retry runtime call one final time. |
| 8355 | Failure* failure = Failure::InternalError(); |
| 8356 | __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); |
| 8357 | GenerateCore(masm, |
| 8358 | &throw_normal_exception, |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8359 | &throw_termination_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8360 | &throw_out_of_memory_exception, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 8361 | true, |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8362 | true, |
| 8363 | kPointerSize); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8364 | |
| 8365 | __ bind(&throw_out_of_memory_exception); |
sgjesse@chromium.org | c81c894 | 2009-08-21 10:54:26 +0000 | [diff] [blame] | 8366 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 8367 | |
| 8368 | __ bind(&throw_termination_exception); |
| 8369 | GenerateThrowUncatchable(masm, TERMINATION); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8370 | |
| 8371 | __ bind(&throw_normal_exception); |
| 8372 | GenerateThrowTOS(masm); |
| 8373 | } |
| 8374 | |
| 8375 | |
| 8376 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 8377 | // r0: code entry |
| 8378 | // r1: function |
| 8379 | // r2: receiver |
| 8380 | // r3: argc |
| 8381 | // [sp+0]: argv |
| 8382 | |
| 8383 | Label invoke, exit; |
| 8384 | |
| 8385 | // Called from C, so do not pop argc and args on exit (preserve sp) |
| 8386 | // No need to save register-passed args |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8387 | // Save callee-saved registers (incl. cp and fp), sp, and lr |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8388 | __ stm(db_w, sp, kCalleeSaved | lr.bit()); |
| 8389 | |
| 8390 | // Get address of argv, see stm above. |
| 8391 | // r0: code entry |
| 8392 | // r1: function |
| 8393 | // r2: receiver |
| 8394 | // r3: argc |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8395 | __ ldr(r4, MemOperand(sp, (kNumCalleeSaved + 1) * kPointerSize)); // argv |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8396 | |
| 8397 | // Push a frame with special values setup to mark it as an entry frame. |
| 8398 | // r0: code entry |
| 8399 | // r1: function |
| 8400 | // r2: receiver |
| 8401 | // r3: argc |
| 8402 | // r4: argv |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8403 | __ mov(r8, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 8404 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 8405 | __ mov(r7, Operand(Smi::FromInt(marker))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8406 | __ mov(r6, Operand(Smi::FromInt(marker))); |
| 8407 | __ mov(r5, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 8408 | __ ldr(r5, MemOperand(r5)); |
lrn@chromium.org | c34f580 | 2010-04-28 12:53:43 +0000 | [diff] [blame] | 8409 | __ Push(r8, r7, r6, r5); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8410 | |
| 8411 | // Setup frame pointer for the frame to be pushed. |
| 8412 | __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 8413 | |
| 8414 | // Call a faked try-block that does the invoke. |
| 8415 | __ bl(&invoke); |
| 8416 | |
| 8417 | // Caught exception: Store result (exception) in the pending |
| 8418 | // exception field in the JSEnv and return a failure sentinel. |
| 8419 | // Coming in here the fp will be invalid because the PushTryHandler below |
| 8420 | // sets it to 0 to signal the existence of the JSEntry frame. |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 8421 | __ mov(ip, Operand(ExternalReference(Top::k_pending_exception_address))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8422 | __ str(r0, MemOperand(ip)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 8423 | __ mov(r0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8424 | __ b(&exit); |
| 8425 | |
| 8426 | // Invoke: Link this frame into the handler chain. |
| 8427 | __ bind(&invoke); |
| 8428 | // Must preserve r0-r4, r5-r7 are available. |
| 8429 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8430 | // If an exception not caught by another handler occurs, this handler |
| 8431 | // returns control to the code after the bl(&invoke) above, which |
| 8432 | // restores all kCalleeSaved registers (including cp and fp) to their |
| 8433 | // saved values before returning a failure to C. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8434 | |
| 8435 | // Clear any pending exceptions. |
| 8436 | __ mov(ip, Operand(ExternalReference::the_hole_value_location())); |
| 8437 | __ ldr(r5, MemOperand(ip)); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 8438 | __ mov(ip, Operand(ExternalReference(Top::k_pending_exception_address))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8439 | __ str(r5, MemOperand(ip)); |
| 8440 | |
| 8441 | // Invoke the function by calling through JS entry trampoline builtin. |
| 8442 | // Notice that we cannot store a reference to the trampoline code directly in |
| 8443 | // this stub, because runtime stubs are not traversed when doing GC. |
| 8444 | |
| 8445 | // Expected registers by Builtins::JSEntryTrampoline |
| 8446 | // r0: code entry |
| 8447 | // r1: function |
| 8448 | // r2: receiver |
| 8449 | // r3: argc |
| 8450 | // r4: argv |
| 8451 | if (is_construct) { |
| 8452 | ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline); |
| 8453 | __ mov(ip, Operand(construct_entry)); |
| 8454 | } else { |
| 8455 | ExternalReference entry(Builtins::JSEntryTrampoline); |
| 8456 | __ mov(ip, Operand(entry)); |
| 8457 | } |
| 8458 | __ ldr(ip, MemOperand(ip)); // deref address |
| 8459 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8460 | // Branch and link to JSEntryTrampoline. We don't use the double underscore |
| 8461 | // macro for the add instruction because we don't want the coverage tool |
| 8462 | // inserting instructions here after we read the pc. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8463 | __ mov(lr, Operand(pc)); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8464 | masm->add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8465 | |
| 8466 | // Unlink this frame from the handler chain. When reading the |
| 8467 | // address of the next handler, there is no need to use the address |
| 8468 | // displacement since the current stack pointer (sp) points directly |
| 8469 | // to the stack handler. |
| 8470 | __ ldr(r3, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
| 8471 | __ mov(ip, Operand(ExternalReference(Top::k_handler_address))); |
| 8472 | __ str(r3, MemOperand(ip)); |
| 8473 | // No need to restore registers |
| 8474 | __ add(sp, sp, Operand(StackHandlerConstants::kSize)); |
| 8475 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8476 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8477 | __ bind(&exit); // r0 holds result |
| 8478 | // Restore the top frame descriptors from the stack. |
| 8479 | __ pop(r3); |
| 8480 | __ mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 8481 | __ str(r3, MemOperand(ip)); |
| 8482 | |
| 8483 | // Reset the stack to the callee saved registers. |
| 8484 | __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 8485 | |
| 8486 | // Restore callee-saved registers and return. |
| 8487 | #ifdef DEBUG |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 8488 | if (FLAG_debug_code) { |
| 8489 | __ mov(lr, Operand(pc)); |
| 8490 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8491 | #endif |
| 8492 | __ ldm(ia_w, sp, kCalleeSaved | pc.bit()); |
| 8493 | } |
| 8494 | |
| 8495 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8496 | // This stub performs an instanceof, calling the builtin function if |
| 8497 | // necessary. Uses r1 for the object, r0 for the function that it may |
| 8498 | // be an instance of (these are fetched from the stack). |
| 8499 | void InstanceofStub::Generate(MacroAssembler* masm) { |
| 8500 | // Get the object - slow case for smis (we may need to throw an exception |
| 8501 | // depending on the rhs). |
| 8502 | Label slow, loop, is_instance, is_not_instance; |
| 8503 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| 8504 | __ BranchOnSmi(r0, &slow); |
| 8505 | |
| 8506 | // Check that the left hand is a JS object and put map in r3. |
| 8507 | __ CompareObjectType(r0, r3, r2, FIRST_JS_OBJECT_TYPE); |
| 8508 | __ b(lt, &slow); |
| 8509 | __ cmp(r2, Operand(LAST_JS_OBJECT_TYPE)); |
| 8510 | __ b(gt, &slow); |
| 8511 | |
| 8512 | // Get the prototype of the function (r4 is result, r2 is scratch). |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8513 | __ ldr(r1, MemOperand(sp, 0)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8514 | // r1 is function, r3 is map. |
| 8515 | |
| 8516 | // Look up the function and the map in the instanceof cache. |
| 8517 | Label miss; |
| 8518 | __ LoadRoot(ip, Heap::kInstanceofCacheFunctionRootIndex); |
| 8519 | __ cmp(r1, ip); |
| 8520 | __ b(ne, &miss); |
| 8521 | __ LoadRoot(ip, Heap::kInstanceofCacheMapRootIndex); |
| 8522 | __ cmp(r3, ip); |
| 8523 | __ b(ne, &miss); |
| 8524 | __ LoadRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
| 8525 | __ pop(); |
| 8526 | __ pop(); |
| 8527 | __ mov(pc, Operand(lr)); |
| 8528 | |
| 8529 | __ bind(&miss); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8530 | __ TryGetFunctionPrototype(r1, r4, r2, &slow); |
| 8531 | |
| 8532 | // Check that the function prototype is a JS object. |
| 8533 | __ BranchOnSmi(r4, &slow); |
| 8534 | __ CompareObjectType(r4, r5, r5, FIRST_JS_OBJECT_TYPE); |
| 8535 | __ b(lt, &slow); |
| 8536 | __ cmp(r5, Operand(LAST_JS_OBJECT_TYPE)); |
| 8537 | __ b(gt, &slow); |
| 8538 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8539 | __ StoreRoot(r1, Heap::kInstanceofCacheFunctionRootIndex); |
| 8540 | __ StoreRoot(r3, Heap::kInstanceofCacheMapRootIndex); |
| 8541 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8542 | // Register mapping: r3 is object map and r4 is function prototype. |
| 8543 | // Get prototype of object into r2. |
| 8544 | __ ldr(r2, FieldMemOperand(r3, Map::kPrototypeOffset)); |
| 8545 | |
| 8546 | // Loop through the prototype chain looking for the function prototype. |
| 8547 | __ bind(&loop); |
| 8548 | __ cmp(r2, Operand(r4)); |
| 8549 | __ b(eq, &is_instance); |
ager@chromium.org | ab99eea | 2009-08-25 07:05:41 +0000 | [diff] [blame] | 8550 | __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| 8551 | __ cmp(r2, ip); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8552 | __ b(eq, &is_not_instance); |
| 8553 | __ ldr(r2, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 8554 | __ ldr(r2, FieldMemOperand(r2, Map::kPrototypeOffset)); |
| 8555 | __ jmp(&loop); |
| 8556 | |
| 8557 | __ bind(&is_instance); |
| 8558 | __ mov(r0, Operand(Smi::FromInt(0))); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8559 | __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8560 | __ pop(); |
| 8561 | __ pop(); |
| 8562 | __ mov(pc, Operand(lr)); // Return. |
| 8563 | |
| 8564 | __ bind(&is_not_instance); |
| 8565 | __ mov(r0, Operand(Smi::FromInt(1))); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8566 | __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8567 | __ pop(); |
| 8568 | __ pop(); |
| 8569 | __ mov(pc, Operand(lr)); // Return. |
| 8570 | |
| 8571 | // Slow-case. Tail call builtin. |
| 8572 | __ bind(&slow); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8573 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_JS); |
| 8574 | } |
| 8575 | |
| 8576 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8577 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 8578 | // The displacement is the offset of the last parameter (if any) |
| 8579 | // relative to the frame pointer. |
| 8580 | static const int kDisplacement = |
| 8581 | StandardFrameConstants::kCallerSPOffset - kPointerSize; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8582 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8583 | // Check that the key is a smi. |
| 8584 | Label slow; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 8585 | __ BranchOnNotSmi(r1, &slow); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8586 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8587 | // Check if the calling frame is an arguments adaptor frame. |
| 8588 | Label adaptor; |
| 8589 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 8590 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 8591 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8592 | __ b(eq, &adaptor); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8593 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8594 | // Check index against formal parameters count limit passed in |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 8595 | // through register r0. Use unsigned comparison to get negative |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8596 | // check for free. |
| 8597 | __ cmp(r1, r0); |
| 8598 | __ b(cs, &slow); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8599 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8600 | // Read the argument from the stack and return it. |
| 8601 | __ sub(r3, r0, r1); |
| 8602 | __ add(r3, fp, Operand(r3, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 8603 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 8604 | __ Jump(lr); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8605 | |
| 8606 | // Arguments adaptor case: Check index against actual arguments |
| 8607 | // limit found in the arguments adaptor frame. Use unsigned |
| 8608 | // comparison to get negative check for free. |
| 8609 | __ bind(&adaptor); |
| 8610 | __ ldr(r0, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 8611 | __ cmp(r1, r0); |
| 8612 | __ b(cs, &slow); |
| 8613 | |
| 8614 | // Read the argument from the adaptor frame and return it. |
| 8615 | __ sub(r3, r0, r1); |
| 8616 | __ add(r3, r2, Operand(r3, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 8617 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
ager@chromium.org | 9085a01 | 2009-05-11 19:22:57 +0000 | [diff] [blame] | 8618 | __ Jump(lr); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8619 | |
| 8620 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 8621 | // by calling the runtime system. |
| 8622 | __ bind(&slow); |
| 8623 | __ push(r1); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8624 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8625 | } |
| 8626 | |
| 8627 | |
| 8628 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8629 | // sp[0] : number of parameters |
| 8630 | // sp[4] : receiver displacement |
| 8631 | // sp[8] : function |
| 8632 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8633 | // Check if the calling frame is an arguments adaptor frame. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8634 | Label adaptor_frame, try_allocate, runtime; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8635 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 8636 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 8637 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8638 | __ b(eq, &adaptor_frame); |
| 8639 | |
| 8640 | // Get the length from the frame. |
| 8641 | __ ldr(r1, MemOperand(sp, 0)); |
| 8642 | __ b(&try_allocate); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8643 | |
| 8644 | // Patch the arguments.length and the parameters pointer. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8645 | __ bind(&adaptor_frame); |
| 8646 | __ ldr(r1, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 8647 | __ str(r1, MemOperand(sp, 0)); |
| 8648 | __ add(r3, r2, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8649 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 8650 | __ str(r3, MemOperand(sp, 1 * kPointerSize)); |
| 8651 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8652 | // Try the new space allocation. Start out with computing the size |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8653 | // of the arguments object and the elements array in words. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8654 | Label add_arguments_object; |
| 8655 | __ bind(&try_allocate); |
| 8656 | __ cmp(r1, Operand(0)); |
| 8657 | __ b(eq, &add_arguments_object); |
| 8658 | __ mov(r1, Operand(r1, LSR, kSmiTagSize)); |
| 8659 | __ add(r1, r1, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 8660 | __ bind(&add_arguments_object); |
| 8661 | __ add(r1, r1, Operand(Heap::kArgumentsObjectSize / kPointerSize)); |
| 8662 | |
| 8663 | // Do the allocation of both objects in one go. |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8664 | __ AllocateInNewSpace( |
| 8665 | r1, |
| 8666 | r0, |
| 8667 | r2, |
| 8668 | r3, |
| 8669 | &runtime, |
| 8670 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8671 | |
| 8672 | // Get the arguments boilerplate from the current (global) context. |
| 8673 | int offset = Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX); |
| 8674 | __ ldr(r4, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 8675 | __ ldr(r4, FieldMemOperand(r4, GlobalObject::kGlobalContextOffset)); |
| 8676 | __ ldr(r4, MemOperand(r4, offset)); |
| 8677 | |
| 8678 | // Copy the JS object part. |
| 8679 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 8680 | __ ldr(r3, FieldMemOperand(r4, i)); |
| 8681 | __ str(r3, FieldMemOperand(r0, i)); |
| 8682 | } |
| 8683 | |
| 8684 | // Setup the callee in-object property. |
| 8685 | ASSERT(Heap::arguments_callee_index == 0); |
| 8686 | __ ldr(r3, MemOperand(sp, 2 * kPointerSize)); |
| 8687 | __ str(r3, FieldMemOperand(r0, JSObject::kHeaderSize)); |
| 8688 | |
| 8689 | // Get the length (smi tagged) and set that as an in-object property too. |
| 8690 | ASSERT(Heap::arguments_length_index == 1); |
| 8691 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); |
| 8692 | __ str(r1, FieldMemOperand(r0, JSObject::kHeaderSize + kPointerSize)); |
| 8693 | |
| 8694 | // If there are no actual arguments, we're done. |
| 8695 | Label done; |
| 8696 | __ cmp(r1, Operand(0)); |
| 8697 | __ b(eq, &done); |
| 8698 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8699 | // Get the parameters pointer from the stack. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8700 | __ ldr(r2, MemOperand(sp, 1 * kPointerSize)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8701 | |
| 8702 | // Setup the elements pointer in the allocated arguments object and |
| 8703 | // initialize the header in the elements fixed array. |
| 8704 | __ add(r4, r0, Operand(Heap::kArgumentsObjectSize)); |
| 8705 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 8706 | __ LoadRoot(r3, Heap::kFixedArrayMapRootIndex); |
| 8707 | __ str(r3, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 8708 | __ str(r1, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8709 | __ mov(r1, Operand(r1, LSR, kSmiTagSize)); // Untag the length for the loop. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 8710 | |
| 8711 | // Copy the fixed array slots. |
| 8712 | Label loop; |
| 8713 | // Setup r4 to point to the first array slot. |
| 8714 | __ add(r4, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 8715 | __ bind(&loop); |
| 8716 | // Pre-decrement r2 with kPointerSize on each iteration. |
| 8717 | // Pre-decrement in order to skip receiver. |
| 8718 | __ ldr(r3, MemOperand(r2, kPointerSize, NegPreIndex)); |
| 8719 | // Post-increment r4 with kPointerSize on each iteration. |
| 8720 | __ str(r3, MemOperand(r4, kPointerSize, PostIndex)); |
| 8721 | __ sub(r1, r1, Operand(1)); |
| 8722 | __ cmp(r1, Operand(0)); |
| 8723 | __ b(ne, &loop); |
| 8724 | |
| 8725 | // Return and remove the on-stack parameters. |
| 8726 | __ bind(&done); |
| 8727 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 8728 | __ Ret(); |
| 8729 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 8730 | // Do the runtime call to allocate the arguments object. |
| 8731 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 8732 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 8733 | } |
| 8734 | |
| 8735 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8736 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 8737 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 8738 | // time or if regexp entry in generated code is turned off runtime switch or |
| 8739 | // at compilation. |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 8740 | #ifdef V8_INTERPRETED_REGEXP |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8741 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 8742 | #else // V8_INTERPRETED_REGEXP |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8743 | if (!FLAG_regexp_entry_native) { |
| 8744 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 8745 | return; |
| 8746 | } |
| 8747 | |
| 8748 | // Stack frame on entry. |
| 8749 | // sp[0]: last_match_info (expected JSArray) |
| 8750 | // sp[4]: previous index |
| 8751 | // sp[8]: subject string |
| 8752 | // sp[12]: JSRegExp object |
| 8753 | |
| 8754 | static const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 8755 | static const int kPreviousIndexOffset = 1 * kPointerSize; |
| 8756 | static const int kSubjectOffset = 2 * kPointerSize; |
| 8757 | static const int kJSRegExpOffset = 3 * kPointerSize; |
| 8758 | |
| 8759 | Label runtime, invoke_regexp; |
| 8760 | |
| 8761 | // Allocation of registers for this function. These are in callee save |
| 8762 | // registers and will be preserved by the call to the native RegExp code, as |
| 8763 | // this code is called using the normal C calling convention. When calling |
| 8764 | // directly from generated code the native RegExp code will not do a GC and |
| 8765 | // therefore the content of these registers are safe to use after the call. |
| 8766 | Register subject = r4; |
| 8767 | Register regexp_data = r5; |
| 8768 | Register last_match_info_elements = r6; |
| 8769 | |
| 8770 | // Ensure that a RegExp stack is allocated. |
| 8771 | ExternalReference address_of_regexp_stack_memory_address = |
| 8772 | ExternalReference::address_of_regexp_stack_memory_address(); |
| 8773 | ExternalReference address_of_regexp_stack_memory_size = |
| 8774 | ExternalReference::address_of_regexp_stack_memory_size(); |
| 8775 | __ mov(r0, Operand(address_of_regexp_stack_memory_size)); |
| 8776 | __ ldr(r0, MemOperand(r0, 0)); |
| 8777 | __ tst(r0, Operand(r0)); |
| 8778 | __ b(eq, &runtime); |
| 8779 | |
| 8780 | // Check that the first argument is a JSRegExp object. |
| 8781 | __ ldr(r0, MemOperand(sp, kJSRegExpOffset)); |
| 8782 | ASSERT_EQ(0, kSmiTag); |
| 8783 | __ tst(r0, Operand(kSmiTagMask)); |
| 8784 | __ b(eq, &runtime); |
| 8785 | __ CompareObjectType(r0, r1, r1, JS_REGEXP_TYPE); |
| 8786 | __ b(ne, &runtime); |
| 8787 | |
| 8788 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 8789 | __ ldr(regexp_data, FieldMemOperand(r0, JSRegExp::kDataOffset)); |
| 8790 | if (FLAG_debug_code) { |
| 8791 | __ tst(regexp_data, Operand(kSmiTagMask)); |
| 8792 | __ Check(nz, "Unexpected type for RegExp data, FixedArray expected"); |
| 8793 | __ CompareObjectType(regexp_data, r0, r0, FIXED_ARRAY_TYPE); |
| 8794 | __ Check(eq, "Unexpected type for RegExp data, FixedArray expected"); |
| 8795 | } |
| 8796 | |
| 8797 | // regexp_data: RegExp data (FixedArray) |
| 8798 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 8799 | __ ldr(r0, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 8800 | __ cmp(r0, Operand(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 8801 | __ b(ne, &runtime); |
| 8802 | |
| 8803 | // regexp_data: RegExp data (FixedArray) |
| 8804 | // Check that the number of captures fit in the static offsets vector buffer. |
| 8805 | __ ldr(r2, |
| 8806 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 8807 | // Calculate number of capture registers (number_of_captures + 1) * 2. This |
| 8808 | // uses the asumption that smis are 2 * their untagged value. |
| 8809 | ASSERT_EQ(0, kSmiTag); |
| 8810 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| 8811 | __ add(r2, r2, Operand(2)); // r2 was a smi. |
| 8812 | // Check that the static offsets vector buffer is large enough. |
| 8813 | __ cmp(r2, Operand(OffsetsVector::kStaticOffsetsVectorSize)); |
| 8814 | __ b(hi, &runtime); |
| 8815 | |
| 8816 | // r2: Number of capture registers |
| 8817 | // regexp_data: RegExp data (FixedArray) |
| 8818 | // Check that the second argument is a string. |
| 8819 | __ ldr(subject, MemOperand(sp, kSubjectOffset)); |
| 8820 | __ tst(subject, Operand(kSmiTagMask)); |
| 8821 | __ b(eq, &runtime); |
| 8822 | Condition is_string = masm->IsObjectStringType(subject, r0); |
| 8823 | __ b(NegateCondition(is_string), &runtime); |
| 8824 | // Get the length of the string to r3. |
| 8825 | __ ldr(r3, FieldMemOperand(subject, String::kLengthOffset)); |
| 8826 | |
| 8827 | // r2: Number of capture registers |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 8828 | // r3: Length of subject string as a smi |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8829 | // subject: Subject string |
| 8830 | // regexp_data: RegExp data (FixedArray) |
| 8831 | // Check that the third argument is a positive smi less than the subject |
| 8832 | // string length. A negative value will be greater (unsigned comparison). |
| 8833 | __ ldr(r0, MemOperand(sp, kPreviousIndexOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 8834 | __ tst(r0, Operand(kSmiTagMask)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8835 | __ b(ne, &runtime); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 8836 | __ cmp(r3, Operand(r0)); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 8837 | __ b(ls, &runtime); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8838 | |
| 8839 | // r2: Number of capture registers |
| 8840 | // subject: Subject string |
| 8841 | // regexp_data: RegExp data (FixedArray) |
| 8842 | // Check that the fourth object is a JSArray object. |
| 8843 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 8844 | __ tst(r0, Operand(kSmiTagMask)); |
| 8845 | __ b(eq, &runtime); |
| 8846 | __ CompareObjectType(r0, r1, r1, JS_ARRAY_TYPE); |
| 8847 | __ b(ne, &runtime); |
| 8848 | // Check that the JSArray is in fast case. |
| 8849 | __ ldr(last_match_info_elements, |
| 8850 | FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 8851 | __ ldr(r0, FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 8852 | __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 8853 | __ cmp(r0, ip); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8854 | __ b(ne, &runtime); |
| 8855 | // Check that the last match info has space for the capture registers and the |
| 8856 | // additional information. |
| 8857 | __ ldr(r0, |
| 8858 | FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| 8859 | __ add(r2, r2, Operand(RegExpImpl::kLastMatchOverhead)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 8860 | __ cmp(r2, Operand(r0, ASR, kSmiTagSize)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8861 | __ b(gt, &runtime); |
| 8862 | |
| 8863 | // subject: Subject string |
| 8864 | // regexp_data: RegExp data (FixedArray) |
| 8865 | // Check the representation and encoding of the subject string. |
| 8866 | Label seq_string; |
| 8867 | const int kStringRepresentationEncodingMask = |
| 8868 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 8869 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 8870 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 8871 | __ and_(r1, r0, Operand(kStringRepresentationEncodingMask)); |
| 8872 | // First check for sequential string. |
| 8873 | ASSERT_EQ(0, kStringTag); |
| 8874 | ASSERT_EQ(0, kSeqStringTag); |
| 8875 | __ tst(r1, Operand(kIsNotStringMask | kStringRepresentationMask)); |
| 8876 | __ b(eq, &seq_string); |
| 8877 | |
| 8878 | // subject: Subject string |
| 8879 | // regexp_data: RegExp data (FixedArray) |
| 8880 | // Check for flat cons string. |
| 8881 | // A flat cons string is a cons string where the second part is the empty |
| 8882 | // string. In that case the subject string is just the first part of the cons |
| 8883 | // string. Also in this case the first part of the cons string is known to be |
| 8884 | // a sequential string or an external string. |
| 8885 | __ and_(r0, r0, Operand(kStringRepresentationMask)); |
| 8886 | __ cmp(r0, Operand(kConsStringTag)); |
| 8887 | __ b(ne, &runtime); |
| 8888 | __ ldr(r0, FieldMemOperand(subject, ConsString::kSecondOffset)); |
| 8889 | __ LoadRoot(r1, Heap::kEmptyStringRootIndex); |
| 8890 | __ cmp(r0, r1); |
| 8891 | __ b(ne, &runtime); |
| 8892 | __ ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
| 8893 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 8894 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 8895 | ASSERT_EQ(0, kSeqStringTag); |
| 8896 | __ tst(r0, Operand(kStringRepresentationMask)); |
| 8897 | __ b(nz, &runtime); |
| 8898 | __ and_(r1, r0, Operand(kStringRepresentationEncodingMask)); |
| 8899 | |
| 8900 | __ bind(&seq_string); |
| 8901 | // r1: suject string type & kStringRepresentationEncodingMask |
| 8902 | // subject: Subject string |
| 8903 | // regexp_data: RegExp data (FixedArray) |
| 8904 | // Check that the irregexp code has been generated for an ascii string. If |
| 8905 | // it has, the field contains a code object otherwise it contains the hole. |
| 8906 | #ifdef DEBUG |
| 8907 | const int kSeqAsciiString = kStringTag | kSeqStringTag | kAsciiStringTag; |
| 8908 | const int kSeqTwoByteString = kStringTag | kSeqStringTag | kTwoByteStringTag; |
| 8909 | CHECK_EQ(4, kSeqAsciiString); |
| 8910 | CHECK_EQ(0, kSeqTwoByteString); |
| 8911 | #endif |
| 8912 | // Find the code object based on the assumptions above. |
| 8913 | __ mov(r3, Operand(r1, ASR, 2), SetCC); |
| 8914 | __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataAsciiCodeOffset), ne); |
| 8915 | __ ldr(r7, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq); |
| 8916 | |
| 8917 | // Check that the irregexp code has been generated for the actual string |
| 8918 | // encoding. If it has, the field contains a code object otherwise it contains |
| 8919 | // the hole. |
| 8920 | __ CompareObjectType(r7, r0, r0, CODE_TYPE); |
| 8921 | __ b(ne, &runtime); |
| 8922 | |
| 8923 | // r3: encoding of subject string (1 if ascii, 0 if two_byte); |
| 8924 | // r7: code |
| 8925 | // subject: Subject string |
| 8926 | // regexp_data: RegExp data (FixedArray) |
| 8927 | // Load used arguments before starting to push arguments for call to native |
| 8928 | // RegExp code to avoid handling changing stack height. |
| 8929 | __ ldr(r1, MemOperand(sp, kPreviousIndexOffset)); |
| 8930 | __ mov(r1, Operand(r1, ASR, kSmiTagSize)); |
| 8931 | |
| 8932 | // r1: previous index |
| 8933 | // r3: encoding of subject string (1 if ascii, 0 if two_byte); |
| 8934 | // r7: code |
| 8935 | // subject: Subject string |
| 8936 | // regexp_data: RegExp data (FixedArray) |
| 8937 | // All checks done. Now push arguments for native regexp code. |
| 8938 | __ IncrementCounter(&Counters::regexp_entry_native, 1, r0, r2); |
| 8939 | |
| 8940 | static const int kRegExpExecuteArguments = 7; |
| 8941 | __ push(lr); |
| 8942 | __ PrepareCallCFunction(kRegExpExecuteArguments, r0); |
| 8943 | |
| 8944 | // Argument 7 (sp[8]): Indicate that this is a direct call from JavaScript. |
| 8945 | __ mov(r0, Operand(1)); |
| 8946 | __ str(r0, MemOperand(sp, 2 * kPointerSize)); |
| 8947 | |
| 8948 | // Argument 6 (sp[4]): Start (high end) of backtracking stack memory area. |
| 8949 | __ mov(r0, Operand(address_of_regexp_stack_memory_address)); |
| 8950 | __ ldr(r0, MemOperand(r0, 0)); |
| 8951 | __ mov(r2, Operand(address_of_regexp_stack_memory_size)); |
| 8952 | __ ldr(r2, MemOperand(r2, 0)); |
| 8953 | __ add(r0, r0, Operand(r2)); |
| 8954 | __ str(r0, MemOperand(sp, 1 * kPointerSize)); |
| 8955 | |
| 8956 | // Argument 5 (sp[0]): static offsets vector buffer. |
| 8957 | __ mov(r0, Operand(ExternalReference::address_of_static_offsets_vector())); |
| 8958 | __ str(r0, MemOperand(sp, 0 * kPointerSize)); |
| 8959 | |
| 8960 | // For arguments 4 and 3 get string length, calculate start of string data and |
| 8961 | // calculate the shift of the index (0 for ASCII and 1 for two byte). |
| 8962 | __ ldr(r0, FieldMemOperand(subject, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 8963 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 8964 | ASSERT_EQ(SeqAsciiString::kHeaderSize, SeqTwoByteString::kHeaderSize); |
| 8965 | __ add(r9, subject, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 8966 | __ eor(r3, r3, Operand(1)); |
| 8967 | // Argument 4 (r3): End of string data |
| 8968 | // Argument 3 (r2): Start of string data |
| 8969 | __ add(r2, r9, Operand(r1, LSL, r3)); |
| 8970 | __ add(r3, r9, Operand(r0, LSL, r3)); |
| 8971 | |
| 8972 | // Argument 2 (r1): Previous index. |
| 8973 | // Already there |
| 8974 | |
| 8975 | // Argument 1 (r0): Subject string. |
| 8976 | __ mov(r0, subject); |
| 8977 | |
| 8978 | // Locate the code entry and call it. |
| 8979 | __ add(r7, r7, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 8980 | __ CallCFunction(r7, kRegExpExecuteArguments); |
| 8981 | __ pop(lr); |
| 8982 | |
| 8983 | // r0: result |
| 8984 | // subject: subject string (callee saved) |
| 8985 | // regexp_data: RegExp data (callee saved) |
| 8986 | // last_match_info_elements: Last match info elements (callee saved) |
| 8987 | |
| 8988 | // Check the result. |
| 8989 | Label success; |
| 8990 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::SUCCESS)); |
| 8991 | __ b(eq, &success); |
| 8992 | Label failure; |
| 8993 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::FAILURE)); |
| 8994 | __ b(eq, &failure); |
| 8995 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
| 8996 | // If not exception it can only be retry. Handle that in the runtime system. |
| 8997 | __ b(ne, &runtime); |
| 8998 | // Result must now be exception. If there is no pending exception already a |
| 8999 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 9000 | // haven't created the exception yet. Handle that in the runtime system. |
| 9001 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
| 9002 | __ mov(r0, Operand(ExternalReference::the_hole_value_location())); |
| 9003 | __ ldr(r0, MemOperand(r0, 0)); |
| 9004 | __ mov(r1, Operand(ExternalReference(Top::k_pending_exception_address))); |
| 9005 | __ ldr(r1, MemOperand(r1, 0)); |
| 9006 | __ cmp(r0, r1); |
| 9007 | __ b(eq, &runtime); |
| 9008 | __ bind(&failure); |
| 9009 | // For failure and exception return null. |
| 9010 | __ mov(r0, Operand(Factory::null_value())); |
| 9011 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 9012 | __ Ret(); |
| 9013 | |
| 9014 | // Process the result from the native regexp code. |
| 9015 | __ bind(&success); |
| 9016 | __ ldr(r1, |
| 9017 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 9018 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 9019 | ASSERT_EQ(0, kSmiTag); |
| 9020 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| 9021 | __ add(r1, r1, Operand(2)); // r1 was a smi. |
| 9022 | |
| 9023 | // r1: number of capture registers |
| 9024 | // r4: subject string |
| 9025 | // Store the capture count. |
| 9026 | __ mov(r2, Operand(r1, LSL, kSmiTagSize + kSmiShiftSize)); // To smi. |
| 9027 | __ str(r2, FieldMemOperand(last_match_info_elements, |
| 9028 | RegExpImpl::kLastCaptureCountOffset)); |
| 9029 | // Store last subject and last input. |
| 9030 | __ mov(r3, last_match_info_elements); // Moved up to reduce latency. |
| 9031 | __ mov(r2, Operand(RegExpImpl::kLastSubjectOffset)); // Ditto. |
| 9032 | __ str(subject, |
| 9033 | FieldMemOperand(last_match_info_elements, |
| 9034 | RegExpImpl::kLastSubjectOffset)); |
| 9035 | __ RecordWrite(r3, r2, r7); |
| 9036 | __ str(subject, |
| 9037 | FieldMemOperand(last_match_info_elements, |
| 9038 | RegExpImpl::kLastInputOffset)); |
| 9039 | __ mov(r3, last_match_info_elements); |
| 9040 | __ mov(r2, Operand(RegExpImpl::kLastInputOffset)); |
| 9041 | __ RecordWrite(r3, r2, r7); |
| 9042 | |
| 9043 | // Get the static offsets vector filled by the native regexp code. |
| 9044 | ExternalReference address_of_static_offsets_vector = |
| 9045 | ExternalReference::address_of_static_offsets_vector(); |
| 9046 | __ mov(r2, Operand(address_of_static_offsets_vector)); |
| 9047 | |
| 9048 | // r1: number of capture registers |
| 9049 | // r2: offsets vector |
| 9050 | Label next_capture, done; |
| 9051 | // Capture register counter starts from number of capture registers and |
| 9052 | // counts down until wraping after zero. |
| 9053 | __ add(r0, |
| 9054 | last_match_info_elements, |
| 9055 | Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag)); |
| 9056 | __ bind(&next_capture); |
| 9057 | __ sub(r1, r1, Operand(1), SetCC); |
| 9058 | __ b(mi, &done); |
| 9059 | // Read the value from the static offsets vector buffer. |
| 9060 | __ ldr(r3, MemOperand(r2, kPointerSize, PostIndex)); |
| 9061 | // Store the smi value in the last match info. |
| 9062 | __ mov(r3, Operand(r3, LSL, kSmiTagSize)); |
| 9063 | __ str(r3, MemOperand(r0, kPointerSize, PostIndex)); |
| 9064 | __ jmp(&next_capture); |
| 9065 | __ bind(&done); |
| 9066 | |
| 9067 | // Return last match info. |
| 9068 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 9069 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 9070 | __ Ret(); |
| 9071 | |
| 9072 | // Do the runtime call to execute the regexp. |
| 9073 | __ bind(&runtime); |
| 9074 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
vegorov@chromium.org | dff694e | 2010-05-17 09:10:26 +0000 | [diff] [blame] | 9075 | #endif // V8_INTERPRETED_REGEXP |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 9076 | } |
| 9077 | |
| 9078 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9079 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 9080 | Label slow; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9081 | |
| 9082 | // If the receiver might be a value (string, number or boolean) check for this |
| 9083 | // and box it if it is. |
| 9084 | if (ReceiverMightBeValue()) { |
| 9085 | // Get the receiver from the stack. |
| 9086 | // function, receiver [, arguments] |
| 9087 | Label receiver_is_value, receiver_is_js_object; |
| 9088 | __ ldr(r1, MemOperand(sp, argc_ * kPointerSize)); |
| 9089 | |
| 9090 | // Check if receiver is a smi (which is a number value). |
| 9091 | __ BranchOnSmi(r1, &receiver_is_value); |
| 9092 | |
| 9093 | // Check if the receiver is a valid JS object. |
| 9094 | __ CompareObjectType(r1, r2, r2, FIRST_JS_OBJECT_TYPE); |
| 9095 | __ b(ge, &receiver_is_js_object); |
| 9096 | |
| 9097 | // Call the runtime to box the value. |
| 9098 | __ bind(&receiver_is_value); |
| 9099 | __ EnterInternalFrame(); |
| 9100 | __ push(r1); |
| 9101 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_JS); |
| 9102 | __ LeaveInternalFrame(); |
| 9103 | __ str(r0, MemOperand(sp, argc_ * kPointerSize)); |
| 9104 | |
| 9105 | __ bind(&receiver_is_js_object); |
| 9106 | } |
| 9107 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9108 | // Get the function to call from the stack. |
| 9109 | // function, receiver [, arguments] |
| 9110 | __ ldr(r1, MemOperand(sp, (argc_ + 1) * kPointerSize)); |
| 9111 | |
| 9112 | // Check that the function is really a JavaScript function. |
| 9113 | // r1: pushed function (to be verified) |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9114 | __ BranchOnSmi(r1, &slow); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9115 | // Get the map of the function object. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 9116 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9117 | __ b(ne, &slow); |
| 9118 | |
| 9119 | // Fast-case: Invoke the function now. |
| 9120 | // r1: pushed function |
| 9121 | ParameterCount actual(argc_); |
| 9122 | __ InvokeFunction(r1, actual, JUMP_FUNCTION); |
| 9123 | |
| 9124 | // Slow-case: Non-function called. |
| 9125 | __ bind(&slow); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9126 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 9127 | // of the original receiver from the call site). |
| 9128 | __ str(r1, MemOperand(sp, argc_ * kPointerSize)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9129 | __ mov(r0, Operand(argc_)); // Setup the number of arguments. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 9130 | __ mov(r2, Operand(0)); |
| 9131 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION); |
| 9132 | __ Jump(Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)), |
| 9133 | RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 9134 | } |
| 9135 | |
| 9136 | |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9137 | // Unfortunately you have to run without snapshots to see most of these |
| 9138 | // names in the profile since most compare stubs end up in the snapshot. |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9139 | const char* CompareStub::GetName() { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9140 | if (name_ != NULL) return name_; |
| 9141 | const int kMaxNameLength = 100; |
| 9142 | name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength); |
| 9143 | if (name_ == NULL) return "OOM"; |
| 9144 | |
| 9145 | const char* cc_name; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9146 | switch (cc_) { |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9147 | case lt: cc_name = "LT"; break; |
| 9148 | case gt: cc_name = "GT"; break; |
| 9149 | case le: cc_name = "LE"; break; |
| 9150 | case ge: cc_name = "GE"; break; |
| 9151 | case eq: cc_name = "EQ"; break; |
| 9152 | case ne: cc_name = "NE"; break; |
| 9153 | default: cc_name = "UnknownCondition"; break; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9154 | } |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9155 | |
| 9156 | const char* strict_name = ""; |
| 9157 | if (strict_ && (cc_ == eq || cc_ == ne)) { |
| 9158 | strict_name = "_STRICT"; |
| 9159 | } |
| 9160 | |
| 9161 | const char* never_nan_nan_name = ""; |
| 9162 | if (never_nan_nan_ && (cc_ == eq || cc_ == ne)) { |
| 9163 | never_nan_nan_name = "_NO_NAN"; |
| 9164 | } |
| 9165 | |
| 9166 | const char* include_number_compare_name = ""; |
| 9167 | if (!include_number_compare_) { |
| 9168 | include_number_compare_name = "_NO_NUMBER"; |
| 9169 | } |
| 9170 | |
| 9171 | OS::SNPrintF(Vector<char>(name_, kMaxNameLength), |
| 9172 | "CompareStub_%s%s%s%s", |
| 9173 | cc_name, |
| 9174 | strict_name, |
| 9175 | never_nan_nan_name, |
| 9176 | include_number_compare_name); |
| 9177 | return name_; |
fschneider@chromium.org | 0c20e67 | 2010-01-14 15:28:53 +0000 | [diff] [blame] | 9178 | } |
| 9179 | |
| 9180 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 9181 | int CompareStub::MinorKey() { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 9182 | // Encode the three parameters in a unique 16 bit value. To avoid duplicate |
| 9183 | // stubs the never NaN NaN condition is only taken into account if the |
| 9184 | // condition is equals. |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9185 | ASSERT((static_cast<unsigned>(cc_) >> 28) < (1 << 13)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 9186 | return ConditionField::encode(static_cast<unsigned>(cc_) >> 28) |
| 9187 | | StrictField::encode(strict_) |
sgjesse@chromium.org | df7a284 | 2010-03-25 14:34:15 +0000 | [diff] [blame] | 9188 | | NeverNanNanField::encode(cc_ == eq ? never_nan_nan_ : false) |
| 9189 | | IncludeNumberCompareField::encode(include_number_compare_); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 9190 | } |
| 9191 | |
| 9192 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9193 | // StringCharCodeAtGenerator |
| 9194 | |
| 9195 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 9196 | Label flat_string; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9197 | Label ascii_string; |
| 9198 | Label got_char_code; |
| 9199 | |
| 9200 | // If the receiver is a smi trigger the non-string case. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9201 | __ BranchOnSmi(object_, receiver_not_string_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9202 | |
| 9203 | // Fetch the instance type of the receiver into result register. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9204 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 9205 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9206 | // 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] | 9207 | __ tst(result_, Operand(kIsNotStringMask)); |
| 9208 | __ b(ne, receiver_not_string_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9209 | |
| 9210 | // If the index is non-smi trigger the non-smi case. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9211 | __ BranchOnNotSmi(index_, &index_not_smi_); |
| 9212 | |
| 9213 | // Put smi-tagged index into scratch register. |
| 9214 | __ mov(scratch_, index_); |
| 9215 | __ bind(&got_smi_index_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9216 | |
| 9217 | // Check for index out of range. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9218 | __ ldr(ip, FieldMemOperand(object_, String::kLengthOffset)); |
| 9219 | __ cmp(ip, Operand(scratch_)); |
| 9220 | __ b(ls, index_out_of_range_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9221 | |
| 9222 | // We need special handling for non-flat strings. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9223 | ASSERT(kSeqStringTag == 0); |
| 9224 | __ tst(result_, Operand(kStringRepresentationMask)); |
| 9225 | __ b(eq, &flat_string); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9226 | |
| 9227 | // Handle non-flat strings. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9228 | __ tst(result_, Operand(kIsConsStringMask)); |
| 9229 | __ b(eq, &call_runtime_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9230 | |
| 9231 | // ConsString. |
| 9232 | // Check whether the right hand side is the empty string (i.e. if |
| 9233 | // this is really a flat string in a cons string). If that is not |
| 9234 | // the case we would rather go to the runtime system now to flatten |
| 9235 | // the string. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9236 | __ ldr(result_, FieldMemOperand(object_, ConsString::kSecondOffset)); |
| 9237 | __ LoadRoot(ip, Heap::kEmptyStringRootIndex); |
| 9238 | __ cmp(result_, Operand(ip)); |
| 9239 | __ b(ne, &call_runtime_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9240 | // 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] | 9241 | __ ldr(object_, FieldMemOperand(object_, ConsString::kFirstOffset)); |
| 9242 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 9243 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 9244 | // If the first cons component is also non-flat, then go to runtime. |
| 9245 | ASSERT(kSeqStringTag == 0); |
| 9246 | __ tst(result_, Operand(kStringRepresentationMask)); |
| 9247 | __ b(nz, &call_runtime_); |
| 9248 | |
| 9249 | // Check for 1-byte or 2-byte string. |
| 9250 | __ bind(&flat_string); |
| 9251 | ASSERT(kAsciiStringTag != 0); |
| 9252 | __ tst(result_, Operand(kStringEncodingMask)); |
| 9253 | __ b(nz, &ascii_string); |
| 9254 | |
| 9255 | // 2-byte string. |
| 9256 | // Load the 2-byte character code into the result register. We can |
| 9257 | // add without shifting since the smi tag size is the log2 of the |
| 9258 | // number of bytes in a two-byte character. |
| 9259 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1 && kSmiShiftSize == 0); |
| 9260 | __ add(scratch_, object_, Operand(scratch_)); |
| 9261 | __ ldrh(result_, FieldMemOperand(scratch_, SeqTwoByteString::kHeaderSize)); |
| 9262 | __ jmp(&got_char_code); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9263 | |
| 9264 | // ASCII string. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9265 | // Load the byte into the result register. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9266 | __ bind(&ascii_string); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9267 | __ add(scratch_, object_, Operand(scratch_, LSR, kSmiTagSize)); |
| 9268 | __ ldrb(result_, FieldMemOperand(scratch_, SeqAsciiString::kHeaderSize)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9269 | |
| 9270 | __ bind(&got_char_code); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9271 | __ mov(result_, Operand(result_, LSL, kSmiTagSize)); |
| 9272 | __ bind(&exit_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9273 | } |
| 9274 | |
| 9275 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9276 | void StringCharCodeAtGenerator::GenerateSlow( |
| 9277 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 9278 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9279 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9280 | // Index is not a smi. |
| 9281 | __ bind(&index_not_smi_); |
| 9282 | // If index is a heap number, try converting it to an integer. |
| 9283 | __ CheckMap(index_, scratch_, |
| 9284 | Factory::heap_number_map(), index_not_number_, true); |
| 9285 | call_helper.BeforeCall(masm); |
sgjesse@chromium.org | 82dbbab | 2010-06-02 08:57:44 +0000 | [diff] [blame^] | 9286 | __ Push(object_, index_); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9287 | __ push(index_); // Consumed by runtime conversion function. |
| 9288 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 9289 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 9290 | } else { |
| 9291 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 9292 | // NumberToSmi discards numbers that are not exact integers. |
| 9293 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 9294 | } |
| 9295 | if (!scratch_.is(r0)) { |
| 9296 | // Save the conversion result before the pop instructions below |
| 9297 | // have a chance to overwrite it. |
| 9298 | __ mov(scratch_, r0); |
| 9299 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9300 | __ pop(index_); |
| 9301 | __ pop(object_); |
sgjesse@chromium.org | 82dbbab | 2010-06-02 08:57:44 +0000 | [diff] [blame^] | 9302 | // Reload the instance type. |
| 9303 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 9304 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9305 | call_helper.AfterCall(masm); |
| 9306 | // If index is still not a smi, it must be out of range. |
| 9307 | __ BranchOnNotSmi(scratch_, index_out_of_range_); |
| 9308 | // Otherwise, return to the fast path. |
| 9309 | __ jmp(&got_smi_index_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9310 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9311 | // Call runtime. We get here when the receiver is a string and the |
| 9312 | // index is a number, but the code of getting the actual character |
| 9313 | // is too complex (e.g., when the string needs to be flattened). |
| 9314 | __ bind(&call_runtime_); |
| 9315 | call_helper.BeforeCall(masm); |
| 9316 | __ Push(object_, index_); |
| 9317 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 9318 | if (!result_.is(r0)) { |
| 9319 | __ mov(result_, r0); |
| 9320 | } |
| 9321 | call_helper.AfterCall(masm); |
| 9322 | __ jmp(&exit_); |
| 9323 | |
| 9324 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
| 9325 | } |
| 9326 | |
| 9327 | |
| 9328 | // ------------------------------------------------------------------------- |
| 9329 | // StringCharFromCodeGenerator |
| 9330 | |
| 9331 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9332 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 9333 | ASSERT(kSmiTag == 0); |
| 9334 | ASSERT(kSmiShiftSize == 0); |
| 9335 | ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9336 | __ tst(code_, |
| 9337 | Operand(kSmiTagMask | |
| 9338 | ((~String::kMaxAsciiCharCode) << kSmiTagSize))); |
| 9339 | __ b(nz, &slow_case_); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9340 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9341 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| 9342 | // At this point code register contains smi tagged ascii char code. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9343 | ASSERT(kSmiTag == 0); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9344 | __ add(result_, result_, Operand(code_, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 9345 | __ ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
| 9346 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 9347 | __ cmp(result_, Operand(ip)); |
| 9348 | __ b(eq, &slow_case_); |
| 9349 | __ bind(&exit_); |
| 9350 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9351 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9352 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9353 | void StringCharFromCodeGenerator::GenerateSlow( |
| 9354 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 9355 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 9356 | |
| 9357 | __ bind(&slow_case_); |
| 9358 | call_helper.BeforeCall(masm); |
| 9359 | __ push(code_); |
| 9360 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 9361 | if (!result_.is(r0)) { |
| 9362 | __ mov(result_, r0); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9363 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 9364 | call_helper.AfterCall(masm); |
| 9365 | __ jmp(&exit_); |
| 9366 | |
| 9367 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
| 9368 | } |
| 9369 | |
| 9370 | |
| 9371 | // ------------------------------------------------------------------------- |
| 9372 | // StringCharAtGenerator |
| 9373 | |
| 9374 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 9375 | char_code_at_generator_.GenerateFast(masm); |
| 9376 | char_from_code_generator_.GenerateFast(masm); |
| 9377 | } |
| 9378 | |
| 9379 | |
| 9380 | void StringCharAtGenerator::GenerateSlow( |
| 9381 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| 9382 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 9383 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9384 | } |
| 9385 | |
| 9386 | |
| 9387 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 9388 | Register dest, |
| 9389 | Register src, |
| 9390 | Register count, |
| 9391 | Register scratch, |
| 9392 | bool ascii) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9393 | Label loop; |
| 9394 | Label done; |
| 9395 | // This loop just copies one character at a time, as it is only used for very |
| 9396 | // short strings. |
| 9397 | if (!ascii) { |
| 9398 | __ add(count, count, Operand(count), SetCC); |
| 9399 | } else { |
| 9400 | __ cmp(count, Operand(0)); |
| 9401 | } |
| 9402 | __ b(eq, &done); |
| 9403 | |
| 9404 | __ bind(&loop); |
| 9405 | __ ldrb(scratch, MemOperand(src, 1, PostIndex)); |
| 9406 | // Perform sub between load and dependent store to get the load time to |
| 9407 | // complete. |
| 9408 | __ sub(count, count, Operand(1), SetCC); |
| 9409 | __ strb(scratch, MemOperand(dest, 1, PostIndex)); |
| 9410 | // last iteration. |
| 9411 | __ b(gt, &loop); |
| 9412 | |
| 9413 | __ bind(&done); |
| 9414 | } |
| 9415 | |
| 9416 | |
| 9417 | enum CopyCharactersFlags { |
| 9418 | COPY_ASCII = 1, |
| 9419 | DEST_ALWAYS_ALIGNED = 2 |
| 9420 | }; |
| 9421 | |
| 9422 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9423 | void StringHelper::GenerateCopyCharactersLong(MacroAssembler* masm, |
| 9424 | Register dest, |
| 9425 | Register src, |
| 9426 | Register count, |
| 9427 | Register scratch1, |
| 9428 | Register scratch2, |
| 9429 | Register scratch3, |
| 9430 | Register scratch4, |
| 9431 | Register scratch5, |
| 9432 | int flags) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9433 | bool ascii = (flags & COPY_ASCII) != 0; |
| 9434 | bool dest_always_aligned = (flags & DEST_ALWAYS_ALIGNED) != 0; |
| 9435 | |
| 9436 | if (dest_always_aligned && FLAG_debug_code) { |
| 9437 | // Check that destination is actually word aligned if the flag says |
| 9438 | // that it is. |
| 9439 | __ tst(dest, Operand(kPointerAlignmentMask)); |
| 9440 | __ Check(eq, "Destination of copy not aligned."); |
| 9441 | } |
| 9442 | |
| 9443 | const int kReadAlignment = 4; |
| 9444 | const int kReadAlignmentMask = kReadAlignment - 1; |
| 9445 | // Ensure that reading an entire aligned word containing the last character |
| 9446 | // of a string will not read outside the allocated area (because we pad up |
| 9447 | // to kObjectAlignment). |
| 9448 | ASSERT(kObjectAlignment >= kReadAlignment); |
| 9449 | // Assumes word reads and writes are little endian. |
| 9450 | // Nothing to do for zero characters. |
| 9451 | Label done; |
| 9452 | if (!ascii) { |
| 9453 | __ add(count, count, Operand(count), SetCC); |
| 9454 | } else { |
| 9455 | __ cmp(count, Operand(0)); |
| 9456 | } |
| 9457 | __ b(eq, &done); |
| 9458 | |
| 9459 | // Assume that you cannot read (or write) unaligned. |
| 9460 | Label byte_loop; |
| 9461 | // Must copy at least eight bytes, otherwise just do it one byte at a time. |
| 9462 | __ cmp(count, Operand(8)); |
| 9463 | __ add(count, dest, Operand(count)); |
| 9464 | Register limit = count; // Read until src equals this. |
| 9465 | __ b(lt, &byte_loop); |
| 9466 | |
| 9467 | if (!dest_always_aligned) { |
| 9468 | // Align dest by byte copying. Copies between zero and three bytes. |
| 9469 | __ and_(scratch4, dest, Operand(kReadAlignmentMask), SetCC); |
| 9470 | Label dest_aligned; |
| 9471 | __ b(eq, &dest_aligned); |
| 9472 | __ cmp(scratch4, Operand(2)); |
| 9473 | __ ldrb(scratch1, MemOperand(src, 1, PostIndex)); |
| 9474 | __ ldrb(scratch2, MemOperand(src, 1, PostIndex), le); |
| 9475 | __ ldrb(scratch3, MemOperand(src, 1, PostIndex), lt); |
| 9476 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 9477 | __ strb(scratch2, MemOperand(dest, 1, PostIndex), le); |
| 9478 | __ strb(scratch3, MemOperand(dest, 1, PostIndex), lt); |
| 9479 | __ bind(&dest_aligned); |
| 9480 | } |
| 9481 | |
| 9482 | Label simple_loop; |
| 9483 | |
| 9484 | __ sub(scratch4, dest, Operand(src)); |
| 9485 | __ and_(scratch4, scratch4, Operand(0x03), SetCC); |
| 9486 | __ b(eq, &simple_loop); |
| 9487 | // Shift register is number of bits in a source word that |
| 9488 | // must be combined with bits in the next source word in order |
| 9489 | // to create a destination word. |
| 9490 | |
| 9491 | // Complex loop for src/dst that are not aligned the same way. |
| 9492 | { |
| 9493 | Label loop; |
| 9494 | __ mov(scratch4, Operand(scratch4, LSL, 3)); |
| 9495 | Register left_shift = scratch4; |
| 9496 | __ and_(src, src, Operand(~3)); // Round down to load previous word. |
| 9497 | __ ldr(scratch1, MemOperand(src, 4, PostIndex)); |
| 9498 | // Store the "shift" most significant bits of scratch in the least |
| 9499 | // signficant bits (i.e., shift down by (32-shift)). |
| 9500 | __ rsb(scratch2, left_shift, Operand(32)); |
| 9501 | Register right_shift = scratch2; |
| 9502 | __ mov(scratch1, Operand(scratch1, LSR, right_shift)); |
| 9503 | |
| 9504 | __ bind(&loop); |
| 9505 | __ ldr(scratch3, MemOperand(src, 4, PostIndex)); |
| 9506 | __ sub(scratch5, limit, Operand(dest)); |
| 9507 | __ orr(scratch1, scratch1, Operand(scratch3, LSL, left_shift)); |
| 9508 | __ str(scratch1, MemOperand(dest, 4, PostIndex)); |
| 9509 | __ mov(scratch1, Operand(scratch3, LSR, right_shift)); |
| 9510 | // Loop if four or more bytes left to copy. |
| 9511 | // Compare to eight, because we did the subtract before increasing dst. |
| 9512 | __ sub(scratch5, scratch5, Operand(8), SetCC); |
| 9513 | __ b(ge, &loop); |
| 9514 | } |
| 9515 | // There is now between zero and three bytes left to copy (negative that |
| 9516 | // number is in scratch5), and between one and three bytes already read into |
| 9517 | // scratch1 (eight times that number in scratch4). We may have read past |
| 9518 | // the end of the string, but because objects are aligned, we have not read |
| 9519 | // past the end of the object. |
| 9520 | // Find the minimum of remaining characters to move and preloaded characters |
| 9521 | // and write those as bytes. |
| 9522 | __ add(scratch5, scratch5, Operand(4), SetCC); |
| 9523 | __ b(eq, &done); |
| 9524 | __ cmp(scratch4, Operand(scratch5, LSL, 3), ne); |
| 9525 | // Move minimum of bytes read and bytes left to copy to scratch4. |
| 9526 | __ mov(scratch5, Operand(scratch4, LSR, 3), LeaveCC, lt); |
| 9527 | // Between one and three (value in scratch5) characters already read into |
| 9528 | // scratch ready to write. |
| 9529 | __ cmp(scratch5, Operand(2)); |
| 9530 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 9531 | __ mov(scratch1, Operand(scratch1, LSR, 8), LeaveCC, ge); |
| 9532 | __ strb(scratch1, MemOperand(dest, 1, PostIndex), ge); |
| 9533 | __ mov(scratch1, Operand(scratch1, LSR, 8), LeaveCC, gt); |
| 9534 | __ strb(scratch1, MemOperand(dest, 1, PostIndex), gt); |
| 9535 | // Copy any remaining bytes. |
| 9536 | __ b(&byte_loop); |
| 9537 | |
| 9538 | // Simple loop. |
| 9539 | // Copy words from src to dst, until less than four bytes left. |
| 9540 | // Both src and dest are word aligned. |
| 9541 | __ bind(&simple_loop); |
| 9542 | { |
| 9543 | Label loop; |
| 9544 | __ bind(&loop); |
| 9545 | __ ldr(scratch1, MemOperand(src, 4, PostIndex)); |
| 9546 | __ sub(scratch3, limit, Operand(dest)); |
| 9547 | __ str(scratch1, MemOperand(dest, 4, PostIndex)); |
| 9548 | // Compare to 8, not 4, because we do the substraction before increasing |
| 9549 | // dest. |
| 9550 | __ cmp(scratch3, Operand(8)); |
| 9551 | __ b(ge, &loop); |
| 9552 | } |
| 9553 | |
| 9554 | // Copy bytes from src to dst until dst hits limit. |
| 9555 | __ bind(&byte_loop); |
| 9556 | __ cmp(dest, Operand(limit)); |
| 9557 | __ ldrb(scratch1, MemOperand(src, 1, PostIndex), lt); |
| 9558 | __ b(ge, &done); |
| 9559 | __ strb(scratch1, MemOperand(dest, 1, PostIndex)); |
| 9560 | __ b(&byte_loop); |
| 9561 | |
| 9562 | __ bind(&done); |
| 9563 | } |
| 9564 | |
| 9565 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9566 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 9567 | Register c1, |
| 9568 | Register c2, |
| 9569 | Register scratch1, |
| 9570 | Register scratch2, |
| 9571 | Register scratch3, |
| 9572 | Register scratch4, |
| 9573 | Register scratch5, |
| 9574 | Label* not_found) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9575 | // Register scratch3 is the general scratch register in this function. |
| 9576 | Register scratch = scratch3; |
| 9577 | |
| 9578 | // Make sure that both characters are not digits as such strings has a |
| 9579 | // different hash algorithm. Don't try to look for these in the symbol table. |
| 9580 | Label not_array_index; |
| 9581 | __ sub(scratch, c1, Operand(static_cast<int>('0'))); |
| 9582 | __ cmp(scratch, Operand(static_cast<int>('9' - '0'))); |
| 9583 | __ b(hi, ¬_array_index); |
| 9584 | __ sub(scratch, c2, Operand(static_cast<int>('0'))); |
| 9585 | __ cmp(scratch, Operand(static_cast<int>('9' - '0'))); |
| 9586 | |
| 9587 | // If check failed combine both characters into single halfword. |
| 9588 | // This is required by the contract of the method: code at the |
| 9589 | // not_found branch expects this combination in c1 register |
| 9590 | __ orr(c1, c1, Operand(c2, LSL, kBitsPerByte), LeaveCC, ls); |
| 9591 | __ b(ls, not_found); |
| 9592 | |
| 9593 | __ bind(¬_array_index); |
| 9594 | // Calculate the two character string hash. |
| 9595 | Register hash = scratch1; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9596 | StringHelper::GenerateHashInit(masm, hash, c1); |
| 9597 | StringHelper::GenerateHashAddCharacter(masm, hash, c2); |
| 9598 | StringHelper::GenerateHashGetHash(masm, hash); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9599 | |
| 9600 | // Collect the two characters in a register. |
| 9601 | Register chars = c1; |
| 9602 | __ orr(chars, chars, Operand(c2, LSL, kBitsPerByte)); |
| 9603 | |
| 9604 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 9605 | // hash: hash of two character string. |
| 9606 | |
| 9607 | // Load symbol table |
| 9608 | // Load address of first element of the symbol table. |
| 9609 | Register symbol_table = c2; |
| 9610 | __ LoadRoot(symbol_table, Heap::kSymbolTableRootIndex); |
| 9611 | |
| 9612 | // Load undefined value |
| 9613 | Register undefined = scratch4; |
| 9614 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 9615 | |
| 9616 | // Calculate capacity mask from the symbol table capacity. |
| 9617 | Register mask = scratch2; |
| 9618 | __ ldr(mask, FieldMemOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| 9619 | __ mov(mask, Operand(mask, ASR, 1)); |
| 9620 | __ sub(mask, mask, Operand(1)); |
| 9621 | |
| 9622 | // Calculate untagged address of the first element of the symbol table. |
| 9623 | Register first_symbol_table_element = symbol_table; |
| 9624 | __ add(first_symbol_table_element, symbol_table, |
| 9625 | Operand(SymbolTable::kElementsStartOffset - kHeapObjectTag)); |
| 9626 | |
| 9627 | // Registers |
| 9628 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 9629 | // hash: hash of two character string |
| 9630 | // mask: capacity mask |
| 9631 | // first_symbol_table_element: address of the first element of |
| 9632 | // the symbol table |
| 9633 | // scratch: - |
| 9634 | |
| 9635 | // Perform a number of probes in the symbol table. |
| 9636 | static const int kProbes = 4; |
| 9637 | Label found_in_symbol_table; |
| 9638 | Label next_probe[kProbes]; |
| 9639 | for (int i = 0; i < kProbes; i++) { |
| 9640 | Register candidate = scratch5; // Scratch register contains candidate. |
| 9641 | |
| 9642 | // Calculate entry in symbol table. |
| 9643 | if (i > 0) { |
| 9644 | __ add(candidate, hash, Operand(SymbolTable::GetProbeOffset(i))); |
| 9645 | } else { |
| 9646 | __ mov(candidate, hash); |
| 9647 | } |
| 9648 | |
| 9649 | __ and_(candidate, candidate, Operand(mask)); |
| 9650 | |
| 9651 | // Load the entry from the symble table. |
| 9652 | ASSERT_EQ(1, SymbolTable::kEntrySize); |
| 9653 | __ ldr(candidate, |
| 9654 | MemOperand(first_symbol_table_element, |
| 9655 | candidate, |
| 9656 | LSL, |
| 9657 | kPointerSizeLog2)); |
| 9658 | |
| 9659 | // If entry is undefined no string with this hash can be found. |
| 9660 | __ cmp(candidate, undefined); |
| 9661 | __ b(eq, not_found); |
| 9662 | |
| 9663 | // If length is not 2 the string is not a candidate. |
| 9664 | __ ldr(scratch, FieldMemOperand(candidate, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9665 | __ cmp(scratch, Operand(Smi::FromInt(2))); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9666 | __ b(ne, &next_probe[i]); |
| 9667 | |
| 9668 | // Check that the candidate is a non-external ascii string. |
| 9669 | __ ldr(scratch, FieldMemOperand(candidate, HeapObject::kMapOffset)); |
| 9670 | __ ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 9671 | __ JumpIfInstanceTypeIsNotSequentialAscii(scratch, scratch, |
| 9672 | &next_probe[i]); |
| 9673 | |
| 9674 | // Check if the two characters match. |
| 9675 | // Assumes that word load is little endian. |
| 9676 | __ ldrh(scratch, FieldMemOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 9677 | __ cmp(chars, scratch); |
| 9678 | __ b(eq, &found_in_symbol_table); |
| 9679 | __ bind(&next_probe[i]); |
| 9680 | } |
| 9681 | |
| 9682 | // No matching 2 character string found by probing. |
| 9683 | __ jmp(not_found); |
| 9684 | |
| 9685 | // Scratch register contains result when we fall through to here. |
| 9686 | Register result = scratch; |
| 9687 | __ bind(&found_in_symbol_table); |
ager@chromium.org | 357bf65 | 2010-04-12 11:30:10 +0000 | [diff] [blame] | 9688 | __ Move(r0, result); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9689 | } |
| 9690 | |
| 9691 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9692 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 9693 | Register hash, |
| 9694 | Register character) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9695 | // hash = character + (character << 10); |
| 9696 | __ add(hash, character, Operand(character, LSL, 10)); |
| 9697 | // hash ^= hash >> 6; |
| 9698 | __ eor(hash, hash, Operand(hash, ASR, 6)); |
| 9699 | } |
| 9700 | |
| 9701 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9702 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 9703 | Register hash, |
| 9704 | Register character) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9705 | // hash += character; |
| 9706 | __ add(hash, hash, Operand(character)); |
| 9707 | // hash += hash << 10; |
| 9708 | __ add(hash, hash, Operand(hash, LSL, 10)); |
| 9709 | // hash ^= hash >> 6; |
| 9710 | __ eor(hash, hash, Operand(hash, ASR, 6)); |
| 9711 | } |
| 9712 | |
| 9713 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9714 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 9715 | Register hash) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9716 | // hash += hash << 3; |
| 9717 | __ add(hash, hash, Operand(hash, LSL, 3)); |
| 9718 | // hash ^= hash >> 11; |
| 9719 | __ eor(hash, hash, Operand(hash, ASR, 11)); |
| 9720 | // hash += hash << 15; |
| 9721 | __ add(hash, hash, Operand(hash, LSL, 15), SetCC); |
| 9722 | |
| 9723 | // if (hash == 0) hash = 27; |
| 9724 | __ mov(hash, Operand(27), LeaveCC, nz); |
| 9725 | } |
| 9726 | |
| 9727 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9728 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 9729 | Label runtime; |
| 9730 | |
| 9731 | // Stack frame on entry. |
| 9732 | // lr: return address |
| 9733 | // sp[0]: to |
| 9734 | // sp[4]: from |
| 9735 | // sp[8]: string |
| 9736 | |
| 9737 | // This stub is called from the native-call %_SubString(...), so |
| 9738 | // nothing can be assumed about the arguments. It is tested that: |
| 9739 | // "string" is a sequential string, |
| 9740 | // both "from" and "to" are smis, and |
| 9741 | // 0 <= from <= to <= string.length. |
| 9742 | // If any of these assumptions fail, we call the runtime system. |
| 9743 | |
| 9744 | static const int kToOffset = 0 * kPointerSize; |
| 9745 | static const int kFromOffset = 1 * kPointerSize; |
| 9746 | static const int kStringOffset = 2 * kPointerSize; |
| 9747 | |
| 9748 | |
| 9749 | // Check bounds and smi-ness. |
| 9750 | __ ldr(r7, MemOperand(sp, kToOffset)); |
| 9751 | __ ldr(r6, MemOperand(sp, kFromOffset)); |
| 9752 | ASSERT_EQ(0, kSmiTag); |
| 9753 | ASSERT_EQ(1, kSmiTagSize + kSmiShiftSize); |
| 9754 | // I.e., arithmetic shift right by one un-smi-tags. |
| 9755 | __ mov(r2, Operand(r7, ASR, 1), SetCC); |
| 9756 | __ mov(r3, Operand(r6, ASR, 1), SetCC, cc); |
| 9757 | // If either r2 or r6 had the smi tag bit set, then carry is set now. |
| 9758 | __ b(cs, &runtime); // Either "from" or "to" is not a smi. |
| 9759 | __ b(mi, &runtime); // From is negative. |
| 9760 | |
| 9761 | __ sub(r2, r2, Operand(r3), SetCC); |
| 9762 | __ b(mi, &runtime); // Fail if from > to. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9763 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 9764 | // are handled in the runtime system (looked up in the single character |
| 9765 | // cache). Two character strings are looked for in the symbol cache. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9766 | __ cmp(r2, Operand(2)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9767 | __ b(lt, &runtime); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9768 | |
| 9769 | // r2: length |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9770 | // r3: from index (untaged smi) |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9771 | // r6: from (smi) |
| 9772 | // r7: to (smi) |
| 9773 | |
| 9774 | // Make sure first argument is a sequential (or flat) string. |
| 9775 | __ ldr(r5, MemOperand(sp, kStringOffset)); |
| 9776 | ASSERT_EQ(0, kSmiTag); |
| 9777 | __ tst(r5, Operand(kSmiTagMask)); |
| 9778 | __ b(eq, &runtime); |
| 9779 | Condition is_string = masm->IsObjectStringType(r5, r1); |
| 9780 | __ b(NegateCondition(is_string), &runtime); |
| 9781 | |
| 9782 | // r1: instance type |
| 9783 | // r2: length |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9784 | // r3: from index (untaged smi) |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9785 | // r5: string |
| 9786 | // r6: from (smi) |
| 9787 | // r7: to (smi) |
| 9788 | Label seq_string; |
| 9789 | __ and_(r4, r1, Operand(kStringRepresentationMask)); |
| 9790 | ASSERT(kSeqStringTag < kConsStringTag); |
| 9791 | ASSERT(kExternalStringTag > kConsStringTag); |
| 9792 | __ cmp(r4, Operand(kConsStringTag)); |
| 9793 | __ b(gt, &runtime); // External strings go to runtime. |
| 9794 | __ b(lt, &seq_string); // Sequential strings are handled directly. |
| 9795 | |
| 9796 | // Cons string. Try to recurse (once) on the first substring. |
| 9797 | // (This adds a little more generality than necessary to handle flattened |
| 9798 | // cons strings, but not much). |
| 9799 | __ ldr(r5, FieldMemOperand(r5, ConsString::kFirstOffset)); |
| 9800 | __ ldr(r4, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 9801 | __ ldrb(r1, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 9802 | __ tst(r1, Operand(kStringRepresentationMask)); |
| 9803 | ASSERT_EQ(0, kSeqStringTag); |
| 9804 | __ b(ne, &runtime); // Cons and External strings go to runtime. |
| 9805 | |
| 9806 | // Definitly a sequential string. |
| 9807 | __ bind(&seq_string); |
| 9808 | |
| 9809 | // r1: instance type. |
| 9810 | // r2: length |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9811 | // r3: from index (untaged smi) |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9812 | // r5: string |
| 9813 | // r6: from (smi) |
| 9814 | // r7: to (smi) |
| 9815 | __ ldr(r4, FieldMemOperand(r5, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9816 | __ cmp(r4, Operand(r7)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9817 | __ b(lt, &runtime); // Fail if to > length. |
| 9818 | |
| 9819 | // r1: instance type. |
| 9820 | // r2: result string length. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9821 | // r3: from index (untaged smi) |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9822 | // r5: string. |
| 9823 | // r6: from offset (smi) |
| 9824 | // Check for flat ascii string. |
| 9825 | Label non_ascii_flat; |
| 9826 | __ tst(r1, Operand(kStringEncodingMask)); |
| 9827 | ASSERT_EQ(0, kTwoByteStringTag); |
| 9828 | __ b(eq, &non_ascii_flat); |
| 9829 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9830 | Label result_longer_than_two; |
| 9831 | __ cmp(r2, Operand(2)); |
| 9832 | __ b(gt, &result_longer_than_two); |
| 9833 | |
| 9834 | // Sub string of length 2 requested. |
| 9835 | // Get the two characters forming the sub string. |
| 9836 | __ add(r5, r5, Operand(r3)); |
| 9837 | __ ldrb(r3, FieldMemOperand(r5, SeqAsciiString::kHeaderSize)); |
| 9838 | __ ldrb(r4, FieldMemOperand(r5, SeqAsciiString::kHeaderSize + 1)); |
| 9839 | |
| 9840 | // Try to lookup two character string in symbol table. |
| 9841 | Label make_two_character_string; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9842 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 9843 | masm, r3, r4, r1, r5, r6, r7, r9, &make_two_character_string); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9844 | __ IncrementCounter(&Counters::sub_string_native, 1, r3, r4); |
| 9845 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 9846 | __ Ret(); |
| 9847 | |
| 9848 | // r2: result string length. |
| 9849 | // r3: two characters combined into halfword in little endian byte order. |
| 9850 | __ bind(&make_two_character_string); |
| 9851 | __ AllocateAsciiString(r0, r2, r4, r5, r9, &runtime); |
| 9852 | __ strh(r3, FieldMemOperand(r0, SeqAsciiString::kHeaderSize)); |
| 9853 | __ IncrementCounter(&Counters::sub_string_native, 1, r3, r4); |
| 9854 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 9855 | __ Ret(); |
| 9856 | |
| 9857 | __ bind(&result_longer_than_two); |
| 9858 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9859 | // Allocate the result. |
| 9860 | __ AllocateAsciiString(r0, r2, r3, r4, r1, &runtime); |
| 9861 | |
| 9862 | // r0: result string. |
| 9863 | // r2: result string length. |
| 9864 | // r5: string. |
| 9865 | // r6: from offset (smi) |
| 9866 | // Locate first character of result. |
| 9867 | __ add(r1, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 9868 | // Locate 'from' character of string. |
| 9869 | __ add(r5, r5, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 9870 | __ add(r5, r5, Operand(r6, ASR, 1)); |
| 9871 | |
| 9872 | // r0: result string. |
| 9873 | // r1: first character of result string. |
| 9874 | // r2: result string length. |
| 9875 | // r5: first character of sub string to copy. |
| 9876 | ASSERT_EQ(0, SeqAsciiString::kHeaderSize & kObjectAlignmentMask); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9877 | StringHelper::GenerateCopyCharactersLong(masm, r1, r5, r2, r3, r4, r6, r7, r9, |
| 9878 | COPY_ASCII | DEST_ALWAYS_ALIGNED); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9879 | __ IncrementCounter(&Counters::sub_string_native, 1, r3, r4); |
| 9880 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 9881 | __ Ret(); |
| 9882 | |
| 9883 | __ bind(&non_ascii_flat); |
| 9884 | // r2: result string length. |
| 9885 | // r5: string. |
| 9886 | // r6: from offset (smi) |
| 9887 | // Check for flat two byte string. |
| 9888 | |
| 9889 | // Allocate the result. |
| 9890 | __ AllocateTwoByteString(r0, r2, r1, r3, r4, &runtime); |
| 9891 | |
| 9892 | // r0: result string. |
| 9893 | // r2: result string length. |
| 9894 | // r5: string. |
| 9895 | // Locate first character of result. |
| 9896 | __ add(r1, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 9897 | // Locate 'from' character of string. |
| 9898 | __ add(r5, r5, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 9899 | // As "from" is a smi it is 2 times the value which matches the size of a two |
| 9900 | // byte character. |
| 9901 | __ add(r5, r5, Operand(r6)); |
| 9902 | |
| 9903 | // r0: result string. |
| 9904 | // r1: first character of result. |
| 9905 | // r2: result length. |
| 9906 | // r5: first character of string to copy. |
| 9907 | ASSERT_EQ(0, SeqTwoByteString::kHeaderSize & kObjectAlignmentMask); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9908 | StringHelper::GenerateCopyCharactersLong(masm, r1, r5, r2, r3, r4, r6, r7, r9, |
| 9909 | DEST_ALWAYS_ALIGNED); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9910 | __ IncrementCounter(&Counters::sub_string_native, 1, r3, r4); |
| 9911 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 9912 | __ Ret(); |
| 9913 | |
| 9914 | // Just jump to runtime to create the sub string. |
| 9915 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 9916 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9917 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9918 | |
| 9919 | |
| 9920 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
| 9921 | Register left, |
| 9922 | Register right, |
| 9923 | Register scratch1, |
| 9924 | Register scratch2, |
| 9925 | Register scratch3, |
| 9926 | Register scratch4) { |
| 9927 | Label compare_lengths; |
| 9928 | // Find minimum length and length difference. |
| 9929 | __ ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 9930 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 9931 | __ sub(scratch3, scratch1, Operand(scratch2), SetCC); |
| 9932 | Register length_delta = scratch3; |
| 9933 | __ mov(scratch1, scratch2, LeaveCC, gt); |
| 9934 | Register min_length = scratch1; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9935 | ASSERT(kSmiTag == 0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9936 | __ tst(min_length, Operand(min_length)); |
| 9937 | __ b(eq, &compare_lengths); |
| 9938 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 9939 | // Untag smi. |
| 9940 | __ mov(min_length, Operand(min_length, ASR, kSmiTagSize)); |
| 9941 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9942 | // Setup registers so that we only need to increment one register |
| 9943 | // in the loop. |
| 9944 | __ add(scratch2, min_length, |
| 9945 | Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 9946 | __ add(left, left, Operand(scratch2)); |
| 9947 | __ add(right, right, Operand(scratch2)); |
| 9948 | // Registers left and right points to the min_length character of strings. |
| 9949 | __ rsb(min_length, min_length, Operand(-1)); |
| 9950 | Register index = min_length; |
| 9951 | // Index starts at -min_length. |
| 9952 | |
| 9953 | { |
| 9954 | // Compare loop. |
| 9955 | Label loop; |
| 9956 | __ bind(&loop); |
| 9957 | // Compare characters. |
| 9958 | __ add(index, index, Operand(1), SetCC); |
| 9959 | __ ldrb(scratch2, MemOperand(left, index), ne); |
| 9960 | __ ldrb(scratch4, MemOperand(right, index), ne); |
| 9961 | // Skip to compare lengths with eq condition true. |
| 9962 | __ b(eq, &compare_lengths); |
| 9963 | __ cmp(scratch2, scratch4); |
| 9964 | __ b(eq, &loop); |
| 9965 | // Fallthrough with eq condition false. |
| 9966 | } |
| 9967 | // Compare lengths - strings up to min-length are equal. |
| 9968 | __ bind(&compare_lengths); |
| 9969 | ASSERT(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
| 9970 | // Use zero length_delta as result. |
| 9971 | __ mov(r0, Operand(length_delta), SetCC, eq); |
| 9972 | // Fall through to here if characters compare not-equal. |
| 9973 | __ mov(r0, Operand(Smi::FromInt(GREATER)), LeaveCC, gt); |
| 9974 | __ mov(r0, Operand(Smi::FromInt(LESS)), LeaveCC, lt); |
| 9975 | __ Ret(); |
| 9976 | } |
| 9977 | |
| 9978 | |
| 9979 | void StringCompareStub::Generate(MacroAssembler* masm) { |
| 9980 | Label runtime; |
| 9981 | |
| 9982 | // Stack frame on entry. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 9983 | // sp[0]: right string |
| 9984 | // sp[4]: left string |
| 9985 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); // left |
| 9986 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); // right |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 9987 | |
| 9988 | Label not_same; |
| 9989 | __ cmp(r0, r1); |
| 9990 | __ b(ne, ¬_same); |
| 9991 | ASSERT_EQ(0, EQUAL); |
| 9992 | ASSERT_EQ(0, kSmiTag); |
| 9993 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 9994 | __ IncrementCounter(&Counters::string_compare_native, 1, r1, r2); |
| 9995 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 9996 | __ Ret(); |
| 9997 | |
| 9998 | __ bind(¬_same); |
| 9999 | |
| 10000 | // Check that both objects are sequential ascii strings. |
| 10001 | __ JumpIfNotBothSequentialAsciiStrings(r0, r1, r2, r3, &runtime); |
| 10002 | |
| 10003 | // Compare flat ascii strings natively. Remove arguments from stack first. |
| 10004 | __ IncrementCounter(&Counters::string_compare_native, 1, r2, r3); |
| 10005 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10006 | GenerateCompareFlatAsciiStrings(masm, r0, r1, r2, r3, r4, r5); |
| 10007 | |
| 10008 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 10009 | // tagged as a small integer. |
| 10010 | __ bind(&runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10011 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 10012 | } |
| 10013 | |
| 10014 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10015 | void StringAddStub::Generate(MacroAssembler* masm) { |
| 10016 | Label string_add_runtime; |
| 10017 | // Stack on entry: |
| 10018 | // sp[0]: second argument. |
| 10019 | // sp[4]: first argument. |
| 10020 | |
| 10021 | // Load the two arguments. |
| 10022 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); // First argument. |
| 10023 | __ ldr(r1, MemOperand(sp, 0 * kPointerSize)); // Second argument. |
| 10024 | |
| 10025 | // Make sure that both arguments are strings if not known in advance. |
| 10026 | if (string_check_) { |
| 10027 | ASSERT_EQ(0, kSmiTag); |
| 10028 | __ JumpIfEitherSmi(r0, r1, &string_add_runtime); |
| 10029 | // Load instance types. |
| 10030 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 10031 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 10032 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 10033 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 10034 | ASSERT_EQ(0, kStringTag); |
| 10035 | // If either is not a string, go to runtime. |
| 10036 | __ tst(r4, Operand(kIsNotStringMask)); |
| 10037 | __ tst(r5, Operand(kIsNotStringMask), eq); |
| 10038 | __ b(ne, &string_add_runtime); |
| 10039 | } |
| 10040 | |
| 10041 | // Both arguments are strings. |
| 10042 | // r0: first string |
| 10043 | // r1: second string |
| 10044 | // r4: first string instance type (if string_check_) |
| 10045 | // r5: second string instance type (if string_check_) |
| 10046 | { |
| 10047 | Label strings_not_empty; |
| 10048 | // Check if either of the strings are empty. In that case return the other. |
| 10049 | __ ldr(r2, FieldMemOperand(r0, String::kLengthOffset)); |
| 10050 | __ ldr(r3, FieldMemOperand(r1, String::kLengthOffset)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10051 | ASSERT(kSmiTag == 0); |
| 10052 | __ cmp(r2, Operand(Smi::FromInt(0))); // Test if first string is empty. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10053 | __ mov(r0, Operand(r1), LeaveCC, eq); // If first is empty, return second. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10054 | ASSERT(kSmiTag == 0); |
| 10055 | // Else test if second string is empty. |
| 10056 | __ cmp(r3, Operand(Smi::FromInt(0)), ne); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10057 | __ b(ne, &strings_not_empty); // If either string was empty, return r0. |
| 10058 | |
| 10059 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10060 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10061 | __ Ret(); |
| 10062 | |
| 10063 | __ bind(&strings_not_empty); |
| 10064 | } |
| 10065 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10066 | __ mov(r2, Operand(r2, ASR, kSmiTagSize)); |
| 10067 | __ mov(r3, Operand(r3, ASR, kSmiTagSize)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10068 | // Both strings are non-empty. |
| 10069 | // r0: first string |
| 10070 | // r1: second string |
| 10071 | // r2: length of first string |
| 10072 | // r3: length of second string |
| 10073 | // r4: first string instance type (if string_check_) |
| 10074 | // r5: second string instance type (if string_check_) |
| 10075 | // Look at the length of the result of adding the two strings. |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10076 | Label string_add_flat_result, longer_than_two; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10077 | // Adding two lengths can't overflow. |
| 10078 | ASSERT(String::kMaxLength * 2 > String::kMaxLength); |
| 10079 | __ add(r6, r2, Operand(r3)); |
| 10080 | // Use the runtime system when adding two one character strings, as it |
| 10081 | // contains optimizations for this specific case using the symbol table. |
| 10082 | __ cmp(r6, Operand(2)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10083 | __ b(ne, &longer_than_two); |
| 10084 | |
| 10085 | // Check that both strings are non-external ascii strings. |
| 10086 | if (!string_check_) { |
| 10087 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 10088 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 10089 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 10090 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 10091 | } |
| 10092 | __ JumpIfBothInstanceTypesAreNotSequentialAscii(r4, r5, r6, r7, |
| 10093 | &string_add_runtime); |
| 10094 | |
| 10095 | // Get the two characters forming the sub string. |
| 10096 | __ ldrb(r2, FieldMemOperand(r0, SeqAsciiString::kHeaderSize)); |
| 10097 | __ ldrb(r3, FieldMemOperand(r1, SeqAsciiString::kHeaderSize)); |
| 10098 | |
| 10099 | // Try to lookup two character string in symbol table. If it is not found |
| 10100 | // just allocate a new one. |
| 10101 | Label make_two_character_string; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10102 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 10103 | masm, r2, r3, r6, r7, r4, r5, r9, &make_two_character_string); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10104 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10105 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10106 | __ Ret(); |
| 10107 | |
| 10108 | __ bind(&make_two_character_string); |
| 10109 | // Resulting string has length 2 and first chars of two strings |
| 10110 | // are combined into single halfword in r2 register. |
| 10111 | // So we can fill resulting string without two loops by a single |
| 10112 | // halfword store instruction (which assumes that processor is |
| 10113 | // in a little endian mode) |
| 10114 | __ mov(r6, Operand(2)); |
| 10115 | __ AllocateAsciiString(r0, r6, r4, r5, r9, &string_add_runtime); |
| 10116 | __ strh(r2, FieldMemOperand(r0, SeqAsciiString::kHeaderSize)); |
| 10117 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10118 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10119 | __ Ret(); |
| 10120 | |
| 10121 | __ bind(&longer_than_two); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10122 | // Check if resulting string will be flat. |
| 10123 | __ cmp(r6, Operand(String::kMinNonFlatLength)); |
| 10124 | __ b(lt, &string_add_flat_result); |
| 10125 | // Handle exceptionally long strings in the runtime system. |
| 10126 | ASSERT((String::kMaxLength & 0x80000000) == 0); |
| 10127 | ASSERT(IsPowerOf2(String::kMaxLength + 1)); |
| 10128 | // kMaxLength + 1 is representable as shifted literal, kMaxLength is not. |
| 10129 | __ cmp(r6, Operand(String::kMaxLength + 1)); |
| 10130 | __ b(hs, &string_add_runtime); |
| 10131 | |
| 10132 | // If result is not supposed to be flat, allocate a cons string object. |
| 10133 | // If both strings are ascii the result is an ascii cons string. |
| 10134 | if (!string_check_) { |
| 10135 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 10136 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 10137 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 10138 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 10139 | } |
| 10140 | Label non_ascii, allocated; |
| 10141 | ASSERT_EQ(0, kTwoByteStringTag); |
| 10142 | __ tst(r4, Operand(kStringEncodingMask)); |
| 10143 | __ tst(r5, Operand(kStringEncodingMask), ne); |
| 10144 | __ b(eq, &non_ascii); |
| 10145 | |
| 10146 | // Allocate an ASCII cons string. |
| 10147 | __ AllocateAsciiConsString(r7, r6, r4, r5, &string_add_runtime); |
| 10148 | __ bind(&allocated); |
| 10149 | // Fill the fields of the cons string. |
| 10150 | __ str(r0, FieldMemOperand(r7, ConsString::kFirstOffset)); |
| 10151 | __ str(r1, FieldMemOperand(r7, ConsString::kSecondOffset)); |
| 10152 | __ mov(r0, Operand(r7)); |
| 10153 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10154 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10155 | __ Ret(); |
| 10156 | |
| 10157 | __ bind(&non_ascii); |
| 10158 | // Allocate a two byte cons string. |
| 10159 | __ AllocateTwoByteConsString(r7, r6, r4, r5, &string_add_runtime); |
| 10160 | __ jmp(&allocated); |
| 10161 | |
| 10162 | // Handle creating a flat result. First check that both strings are |
| 10163 | // sequential and that they have the same encoding. |
| 10164 | // r0: first string |
| 10165 | // r1: second string |
| 10166 | // r2: length of first string |
| 10167 | // r3: length of second string |
| 10168 | // r4: first string instance type (if string_check_) |
| 10169 | // r5: second string instance type (if string_check_) |
| 10170 | // r6: sum of lengths. |
| 10171 | __ bind(&string_add_flat_result); |
| 10172 | if (!string_check_) { |
| 10173 | __ ldr(r4, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 10174 | __ ldr(r5, FieldMemOperand(r1, HeapObject::kMapOffset)); |
| 10175 | __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset)); |
| 10176 | __ ldrb(r5, FieldMemOperand(r5, Map::kInstanceTypeOffset)); |
| 10177 | } |
| 10178 | // Check that both strings are sequential. |
| 10179 | ASSERT_EQ(0, kSeqStringTag); |
| 10180 | __ tst(r4, Operand(kStringRepresentationMask)); |
| 10181 | __ tst(r5, Operand(kStringRepresentationMask), eq); |
| 10182 | __ b(ne, &string_add_runtime); |
| 10183 | // Now check if both strings have the same encoding (ASCII/Two-byte). |
| 10184 | // r0: first string. |
| 10185 | // r1: second string. |
| 10186 | // r2: length of first string. |
| 10187 | // r3: length of second string. |
| 10188 | // r6: sum of lengths.. |
| 10189 | Label non_ascii_string_add_flat_result; |
| 10190 | ASSERT(IsPowerOf2(kStringEncodingMask)); // Just one bit to test. |
| 10191 | __ eor(r7, r4, Operand(r5)); |
| 10192 | __ tst(r7, Operand(kStringEncodingMask)); |
| 10193 | __ b(ne, &string_add_runtime); |
| 10194 | // And see if it's ASCII or two-byte. |
| 10195 | __ tst(r4, Operand(kStringEncodingMask)); |
| 10196 | __ b(eq, &non_ascii_string_add_flat_result); |
| 10197 | |
| 10198 | // Both strings are sequential ASCII strings. We also know that they are |
| 10199 | // short (since the sum of the lengths is less than kMinNonFlatLength). |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10200 | // r6: length of resulting flat string |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10201 | __ AllocateAsciiString(r7, r6, r4, r5, r9, &string_add_runtime); |
| 10202 | // Locate first character of result. |
| 10203 | __ add(r6, r7, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 10204 | // Locate first character of first argument. |
| 10205 | __ add(r0, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 10206 | // r0: first character of first string. |
| 10207 | // r1: second string. |
| 10208 | // r2: length of first string. |
| 10209 | // r3: length of second string. |
| 10210 | // r6: first character of result. |
| 10211 | // r7: result string. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10212 | StringHelper::GenerateCopyCharacters(masm, r6, r0, r2, r4, true); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10213 | |
| 10214 | // Load second argument and locate first character. |
| 10215 | __ add(r1, r1, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 10216 | // r1: first character of second string. |
| 10217 | // r3: length of second string. |
| 10218 | // r6: next character of result. |
| 10219 | // r7: result string. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10220 | StringHelper::GenerateCopyCharacters(masm, r6, r1, r3, r4, true); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10221 | __ mov(r0, Operand(r7)); |
| 10222 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10223 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10224 | __ Ret(); |
| 10225 | |
| 10226 | __ bind(&non_ascii_string_add_flat_result); |
| 10227 | // Both strings are sequential two byte strings. |
| 10228 | // r0: first string. |
| 10229 | // r1: second string. |
| 10230 | // r2: length of first string. |
| 10231 | // r3: length of second string. |
| 10232 | // r6: sum of length of strings. |
| 10233 | __ AllocateTwoByteString(r7, r6, r4, r5, r9, &string_add_runtime); |
| 10234 | // r0: first string. |
| 10235 | // r1: second string. |
| 10236 | // r2: length of first string. |
| 10237 | // r3: length of second string. |
| 10238 | // r7: result string. |
| 10239 | |
| 10240 | // Locate first character of result. |
| 10241 | __ add(r6, r7, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 10242 | // Locate first character of first argument. |
| 10243 | __ add(r0, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 10244 | |
| 10245 | // r0: first character of first string. |
| 10246 | // r1: second string. |
| 10247 | // r2: length of first string. |
| 10248 | // r3: length of second string. |
| 10249 | // r6: first character of result. |
| 10250 | // r7: result string. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10251 | StringHelper::GenerateCopyCharacters(masm, r6, r0, r2, r4, false); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10252 | |
| 10253 | // Locate first character of second argument. |
| 10254 | __ add(r1, r1, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 10255 | |
| 10256 | // r1: first character of second string. |
| 10257 | // r3: length of second string. |
| 10258 | // r6: next character of result (after copy of first string). |
| 10259 | // r7: result string. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 10260 | StringHelper::GenerateCopyCharacters(masm, r6, r1, r3, r4, false); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10261 | |
| 10262 | __ mov(r0, Operand(r7)); |
| 10263 | __ IncrementCounter(&Counters::string_add_native, 1, r2, r3); |
| 10264 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 10265 | __ Ret(); |
| 10266 | |
| 10267 | // Just jump to runtime to add the two strings. |
| 10268 | __ bind(&string_add_runtime); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 10269 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 10270 | } |
| 10271 | |
| 10272 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 10273 | #undef __ |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 10274 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 10275 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 10276 | |
| 10277 | #endif // V8_TARGET_ARCH_ARM |