ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 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 | |
| 30 | #include "bootstrapper.h" |
| 31 | #include "codegen-inl.h" |
| 32 | #include "debug.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 33 | #include "scopes.h" |
| 34 | #include "runtime.h" |
| 35 | |
| 36 | namespace v8 { namespace internal { |
| 37 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 38 | #define __ masm_-> |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 39 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 40 | // ------------------------------------------------------------------------- |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 41 | // VirtualFrame implementation. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 42 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 43 | VirtualFrame::VirtualFrame(CodeGenerator* cgen) { |
| 44 | ASSERT(cgen->scope() != NULL); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 45 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 46 | masm_ = cgen->masm(); |
| 47 | frame_local_count_ = cgen->scope()->num_stack_slots(); |
| 48 | parameter_count_ = cgen->scope()->num_parameters(); |
| 49 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 50 | |
| 51 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 52 | void VirtualFrame::Enter() { |
| 53 | Comment cmnt(masm_, "[ Enter JS frame"); |
| 54 | __ push(ebp); |
| 55 | __ mov(ebp, Operand(esp)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 56 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 57 | // Store the context and the function in the frame. |
| 58 | __ push(esi); |
| 59 | __ push(edi); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 60 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 61 | // Clear the function slot when generating debug code. |
| 62 | if (FLAG_debug_code) { |
| 63 | __ Set(edi, Immediate(reinterpret_cast<int>(kZapValue))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 64 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 65 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 66 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 67 | |
| 68 | void VirtualFrame::Exit() { |
| 69 | Comment cmnt(masm_, "[ Exit JS frame"); |
| 70 | // Record the location of the JS exit code for patching when setting |
| 71 | // break point. |
| 72 | __ RecordJSReturn(); |
| 73 | |
| 74 | // Avoid using the leave instruction here, because it is too |
| 75 | // short. We need the return sequence to be a least the size of a |
| 76 | // call instruction to support patching the exit code in the |
| 77 | // debugger. See VisitReturnStatement for the full return sequence. |
| 78 | __ mov(esp, Operand(ebp)); |
| 79 | __ pop(ebp); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | void VirtualFrame::AllocateLocals() { |
| 84 | if (frame_local_count_ > 0) { |
| 85 | Comment cmnt(masm_, "[ Allocate space for locals"); |
| 86 | __ Set(eax, Immediate(Factory::undefined_value())); |
| 87 | for (int i = 0; i < frame_local_count_; i++) { |
| 88 | __ push(eax); |
| 89 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 90 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 91 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 92 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 93 | |
| 94 | void VirtualFrame::Drop(int count) { |
| 95 | ASSERT(count >= 0); |
| 96 | if (count > 0) { |
| 97 | __ add(Operand(esp), Immediate(count * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 98 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 99 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 100 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 101 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 102 | void VirtualFrame::Pop() { Drop(1); } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 103 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 104 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 105 | void VirtualFrame::Pop(Register reg) { |
| 106 | __ pop(reg); |
| 107 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 108 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 109 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 110 | void VirtualFrame::Pop(Operand operand) { |
| 111 | __ pop(operand); |
| 112 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 113 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 114 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 115 | void VirtualFrame::Push(Register reg) { |
| 116 | __ push(reg); |
| 117 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 118 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 119 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 120 | void VirtualFrame::Push(Operand operand) { |
| 121 | __ push(operand); |
| 122 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 123 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 124 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 125 | void VirtualFrame::Push(Immediate immediate) { |
| 126 | __ push(immediate); |
| 127 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 128 | |
| 129 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 130 | // ------------------------------------------------------------------------- |
| 131 | // CodeGenState implementation. |
| 132 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 133 | CodeGenState::CodeGenState(CodeGenerator* owner) |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 134 | : owner_(owner), |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 135 | typeof_state_(NOT_INSIDE_TYPEOF), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 136 | true_target_(NULL), |
| 137 | false_target_(NULL), |
| 138 | previous_(NULL) { |
| 139 | owner_->set_state(this); |
| 140 | } |
| 141 | |
| 142 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 143 | CodeGenState::CodeGenState(CodeGenerator* owner, |
| 144 | TypeofState typeof_state, |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 145 | Label* true_target, |
| 146 | Label* false_target) |
| 147 | : owner_(owner), |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 148 | typeof_state_(typeof_state), |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 149 | true_target_(true_target), |
| 150 | false_target_(false_target), |
| 151 | previous_(owner->state()) { |
| 152 | owner_->set_state(this); |
| 153 | } |
| 154 | |
| 155 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 156 | CodeGenState::~CodeGenState() { |
| 157 | ASSERT(owner_->state() == this); |
| 158 | owner_->set_state(previous_); |
| 159 | } |
| 160 | |
| 161 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 162 | // ------------------------------------------------------------------------- |
| 163 | // CodeGenerator implementation |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 164 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 165 | CodeGenerator::CodeGenerator(int buffer_size, Handle<Script> script, |
| 166 | bool is_eval) |
| 167 | : is_eval_(is_eval), |
| 168 | script_(script), |
| 169 | deferred_(8), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 170 | masm_(new MacroAssembler(NULL, buffer_size)), |
| 171 | scope_(NULL), |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 172 | frame_(NULL), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 173 | cc_reg_(no_condition), |
| 174 | state_(NULL), |
| 175 | is_inside_try_(false), |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 176 | break_stack_height_(0), |
| 177 | loop_nesting_(0) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | |
| 181 | // Calling conventions: |
| 182 | // ebp: frame pointer |
| 183 | // esp: stack pointer |
| 184 | // edi: caller's parameter pointer |
| 185 | // esi: callee's context |
| 186 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 187 | void CodeGenerator::GenCode(FunctionLiteral* fun) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 188 | // Record the position for debugging purposes. |
| 189 | __ RecordPosition(fun->start_position()); |
| 190 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 191 | ZoneList<Statement*>* body = fun->body(); |
| 192 | |
| 193 | // Initialize state. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 194 | ASSERT(scope_ == NULL); |
| 195 | scope_ = fun->scope(); |
| 196 | ASSERT(frame_ == NULL); |
| 197 | VirtualFrame virtual_frame(this); |
| 198 | frame_ = &virtual_frame; |
| 199 | cc_reg_ = no_condition; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 200 | |
| 201 | // Adjust for function-level loop nesting. |
| 202 | loop_nesting_ += fun->loop_nesting(); |
| 203 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 204 | { |
| 205 | CodeGenState state(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 206 | |
| 207 | // Entry |
| 208 | // stack: function, receiver, arguments, return address |
| 209 | // esp: stack pointer |
| 210 | // ebp: frame pointer |
| 211 | // edi: caller's parameter pointer |
| 212 | // esi: callee's context |
| 213 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 214 | frame_->Enter(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 215 | // tos: code slot |
| 216 | #ifdef DEBUG |
| 217 | if (strlen(FLAG_stop_at) > 0 && |
| 218 | fun->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
| 219 | __ int3(); |
| 220 | } |
| 221 | #endif |
| 222 | |
| 223 | // This section now only allocates and copies the formals into the |
| 224 | // arguments object. It saves the address in ecx, which is saved |
| 225 | // at any point before either garbage collection or ecx is |
| 226 | // overwritten. The flag arguments_array_allocated communicates |
| 227 | // with the store into the arguments variable and guards the lazy |
| 228 | // pushes of ecx to TOS. The flag arguments_array_saved notes |
| 229 | // when the push has happened. |
| 230 | bool arguments_object_allocated = false; |
| 231 | bool arguments_object_saved = false; |
| 232 | |
| 233 | // Allocate arguments object. |
| 234 | // The arguments object pointer needs to be saved in ecx, since we need |
| 235 | // to store arguments into the context. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 236 | if (scope_->arguments() != NULL) { |
| 237 | ASSERT(scope_->arguments_shadow() != NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 238 | Comment cmnt(masm_, "[ allocate arguments object"); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 239 | ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 240 | __ lea(eax, frame_->Receiver()); |
| 241 | frame_->Push(frame_->Function()); |
| 242 | frame_->Push(eax); |
| 243 | frame_->Push(Immediate(Smi::FromInt(scope_->num_parameters()))); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 244 | __ CallStub(&stub); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 245 | __ mov(ecx, Operand(eax)); |
| 246 | arguments_object_allocated = true; |
| 247 | } |
| 248 | |
| 249 | // Allocate space for locals and initialize them. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 250 | frame_->AllocateLocals(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 251 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 252 | if (scope_->num_heap_slots() > 0) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 253 | Comment cmnt(masm_, "[ allocate local context"); |
| 254 | // Save the arguments object pointer, if any. |
| 255 | if (arguments_object_allocated && !arguments_object_saved) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 256 | frame_->Push(ecx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 257 | arguments_object_saved = true; |
| 258 | } |
| 259 | // Allocate local context. |
| 260 | // Get outer context and create a new context based on it. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 261 | frame_->Push(frame_->Function()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 262 | __ CallRuntime(Runtime::kNewContext, 1); // eax holds the result |
| 263 | |
| 264 | if (kDebug) { |
| 265 | Label verified_true; |
| 266 | // Verify eax and esi are the same in debug mode |
| 267 | __ cmp(eax, Operand(esi)); |
| 268 | __ j(equal, &verified_true); |
| 269 | __ int3(); |
| 270 | __ bind(&verified_true); |
| 271 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 272 | // Update context local. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 273 | __ mov(frame_->Context(), esi); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | // TODO(1241774): Improve this code: |
| 277 | // 1) only needed if we have a context |
| 278 | // 2) no need to recompute context ptr every single time |
| 279 | // 3) don't copy parameter operand code from SlotOperand! |
| 280 | { |
| 281 | Comment cmnt2(masm_, "[ copy context parameters into .context"); |
| 282 | |
| 283 | // Note that iteration order is relevant here! If we have the same |
| 284 | // parameter twice (e.g., function (x, y, x)), and that parameter |
| 285 | // needs to be copied into the context, it must be the last argument |
| 286 | // passed to the parameter that needs to be copied. This is a rare |
| 287 | // case so we don't check for it, instead we rely on the copying |
| 288 | // order: such a parameter is copied repeatedly into the same |
| 289 | // context location and thus the last value is what is seen inside |
| 290 | // the function. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 291 | for (int i = 0; i < scope_->num_parameters(); i++) { |
| 292 | Variable* par = scope_->parameter(i); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 293 | Slot* slot = par->slot(); |
| 294 | if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| 295 | // Save the arguments object pointer, if any. |
| 296 | if (arguments_object_allocated && !arguments_object_saved) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 297 | frame_->Push(ecx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 298 | arguments_object_saved = true; |
| 299 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 300 | ASSERT(!scope_->is_global_scope()); // no parameters in global scope |
| 301 | __ mov(eax, frame_->Parameter(i)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 302 | // Loads ecx with context; used below in RecordWrite. |
| 303 | __ mov(SlotOperand(slot, ecx), eax); |
| 304 | int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 305 | __ RecordWrite(ecx, offset, eax, ebx); |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | // This section stores the pointer to the arguments object that |
| 311 | // was allocated and copied into above. If the address was not |
| 312 | // saved to TOS, we push ecx onto the stack. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 313 | // |
| 314 | // Store the arguments object. This must happen after context |
| 315 | // initialization because the arguments object may be stored in the |
| 316 | // context. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 317 | if (arguments_object_allocated) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 318 | ASSERT(scope_->arguments() != NULL); |
| 319 | ASSERT(scope_->arguments_shadow() != NULL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 320 | Comment cmnt(masm_, "[ store arguments object"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 321 | { Reference shadow_ref(this, scope_->arguments_shadow()); |
| 322 | ASSERT(shadow_ref.is_slot()); |
| 323 | { Reference arguments_ref(this, scope_->arguments()); |
| 324 | ASSERT(arguments_ref.is_slot()); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 325 | // If the newly-allocated arguments object is already on the |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 326 | // stack, we make use of the convenient property that references |
| 327 | // representing slots take up no space on the expression stack |
| 328 | // (ie, it doesn't matter that the stored value is actually below |
| 329 | // the reference). |
| 330 | // |
| 331 | // If the newly-allocated argument object is not already on |
| 332 | // the stack, we rely on the property that loading a |
| 333 | // zero-sized reference will not clobber the ecx register. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 334 | if (!arguments_object_saved) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 335 | frame_->Push(ecx); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 336 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 337 | arguments_ref.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 338 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 339 | shadow_ref.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 340 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 341 | frame_->Pop(); // Value is no longer needed. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 342 | } |
| 343 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 344 | // Generate code to 'execute' declarations and initialize functions |
| 345 | // (source elements). In case of an illegal redeclaration we need to |
| 346 | // handle that instead of processing the declarations. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 347 | if (scope_->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 348 | Comment cmnt(masm_, "[ illegal redeclarations"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 349 | scope_->VisitIllegalRedeclaration(this); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 350 | } else { |
| 351 | Comment cmnt(masm_, "[ declarations"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 352 | ProcessDeclarations(scope_->declarations()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 353 | // Bail out if a stack-overflow exception occurred when processing |
| 354 | // declarations. |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 355 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | if (FLAG_trace) { |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 359 | __ CallRuntime(Runtime::kTraceEnter, 0); |
| 360 | // Ignore the return value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 361 | } |
| 362 | CheckStack(); |
| 363 | |
| 364 | // Compile the body of the function in a vanilla state. Don't |
| 365 | // bother compiling all the code if the scope has an illegal |
| 366 | // redeclaration. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 367 | if (!scope_->HasIllegalRedeclaration()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 368 | Comment cmnt(masm_, "[ function body"); |
| 369 | #ifdef DEBUG |
| 370 | bool is_builtin = Bootstrapper::IsActive(); |
| 371 | bool should_trace = |
| 372 | is_builtin ? FLAG_trace_builtin_calls : FLAG_trace_calls; |
| 373 | if (should_trace) { |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 374 | __ CallRuntime(Runtime::kDebugTrace, 0); |
| 375 | // Ignore the return value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 376 | } |
| 377 | #endif |
| 378 | VisitStatements(body); |
| 379 | |
| 380 | // Generate a return statement if necessary. |
| 381 | if (body->is_empty() || body->last()->AsReturnStatement() == NULL) { |
| 382 | Literal undefined(Factory::undefined_value()); |
| 383 | ReturnStatement statement(&undefined); |
| 384 | statement.set_statement_pos(fun->end_position()); |
| 385 | VisitReturnStatement(&statement); |
| 386 | } |
| 387 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 388 | } |
| 389 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 390 | // Adjust for function-level loop nesting. |
| 391 | loop_nesting_ -= fun->loop_nesting(); |
| 392 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 393 | // Code generation state must be reset. |
| 394 | scope_ = NULL; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 395 | frame_ = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 396 | ASSERT(!has_cc()); |
| 397 | ASSERT(state_ == NULL); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 398 | ASSERT(loop_nesting() == 0); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 402 | Operand CodeGenerator::SlotOperand(Slot* slot, Register tmp) { |
| 403 | // Currently, this assertion will fail if we try to assign to |
| 404 | // a constant variable that is constant because it is read-only |
| 405 | // (such as the variable referring to a named function expression). |
| 406 | // We need to implement assignments to read-only variables. |
| 407 | // Ideally, we should do this during AST generation (by converting |
| 408 | // such assignments into expression statements); however, in general |
| 409 | // we may not be able to make the decision until past AST generation, |
| 410 | // that is when the entire program is known. |
| 411 | ASSERT(slot != NULL); |
| 412 | int index = slot->index(); |
| 413 | switch (slot->type()) { |
| 414 | case Slot::PARAMETER: |
| 415 | return frame_->Parameter(index); |
| 416 | |
| 417 | case Slot::LOCAL: |
| 418 | return frame_->Local(index); |
| 419 | |
| 420 | case Slot::CONTEXT: { |
| 421 | // Follow the context chain if necessary. |
| 422 | ASSERT(!tmp.is(esi)); // do not overwrite context register |
| 423 | Register context = esi; |
| 424 | int chain_length = scope()->ContextChainLength(slot->var()->scope()); |
| 425 | for (int i = chain_length; i-- > 0;) { |
| 426 | // Load the closure. |
| 427 | // (All contexts, even 'with' contexts, have a closure, |
| 428 | // and it is the same for all contexts inside a function. |
| 429 | // There is no need to go to the function context first.) |
| 430 | __ mov(tmp, ContextOperand(context, Context::CLOSURE_INDEX)); |
| 431 | // Load the function context (which is the incoming, outer context). |
| 432 | __ mov(tmp, FieldOperand(tmp, JSFunction::kContextOffset)); |
| 433 | context = tmp; |
| 434 | } |
| 435 | // We may have a 'with' context now. Get the function context. |
| 436 | // (In fact this mov may never be the needed, since the scope analysis |
| 437 | // may not permit a direct context access in this case and thus we are |
| 438 | // always at a function context. However it is safe to dereference be- |
| 439 | // cause the function context of a function context is itself. Before |
| 440 | // deleting this mov we should try to create a counter-example first, |
| 441 | // though...) |
| 442 | __ mov(tmp, ContextOperand(context, Context::FCONTEXT_INDEX)); |
| 443 | return ContextOperand(tmp, index); |
| 444 | } |
| 445 | |
| 446 | default: |
| 447 | UNREACHABLE(); |
| 448 | return Operand(eax); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 453 | // Loads a value on TOS. If it is a boolean value, the result may have been |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 454 | // (partially) translated into branches, or it may have set the condition |
| 455 | // code register. If force_cc is set, the value is forced to set the |
| 456 | // condition code register and no value is pushed. If the condition code |
| 457 | // register was set, has_cc() is true and cc_reg_ contains the condition to |
| 458 | // test for 'true'. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 459 | void CodeGenerator::LoadCondition(Expression* x, |
| 460 | TypeofState typeof_state, |
| 461 | Label* true_target, |
| 462 | Label* false_target, |
| 463 | bool force_cc) { |
| 464 | ASSERT(!has_cc()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 465 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 466 | { CodeGenState new_state(this, typeof_state, true_target, false_target); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 467 | Visit(x); |
| 468 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 469 | if (force_cc && !has_cc()) { |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 470 | // Convert the TOS value to a boolean in the condition code register. |
| 471 | // Visiting an expression may possibly choose neither (a) to leave a |
| 472 | // value in the condition code register nor (b) to leave a value in TOS |
| 473 | // (eg, by compiling to only jumps to the targets). In that case the |
| 474 | // code generated by ToBoolean is wrong because it assumes the value of |
| 475 | // the expression in TOS. So long as there is always a value in TOS or |
| 476 | // the condition code register when control falls through to here (there |
| 477 | // is), the code generated by ToBoolean is dead and therefore safe. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 478 | ToBoolean(true_target, false_target); |
| 479 | } |
| 480 | ASSERT(has_cc() || !force_cc); |
| 481 | } |
| 482 | |
| 483 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 484 | void CodeGenerator::Load(Expression* x, TypeofState typeof_state) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 485 | Label true_target; |
| 486 | Label false_target; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 487 | LoadCondition(x, typeof_state, &true_target, &false_target, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 488 | |
| 489 | if (has_cc()) { |
| 490 | // convert cc_reg_ into a bool |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 491 | Label loaded, materialize_true; |
| 492 | __ j(cc_reg_, &materialize_true); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 493 | frame_->Push(Immediate(Factory::false_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 494 | __ jmp(&loaded); |
| 495 | __ bind(&materialize_true); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 496 | frame_->Push(Immediate(Factory::true_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 497 | __ bind(&loaded); |
| 498 | cc_reg_ = no_condition; |
| 499 | } |
| 500 | |
| 501 | if (true_target.is_linked() || false_target.is_linked()) { |
| 502 | // we have at least one condition value |
| 503 | // that has been "translated" into a branch, |
| 504 | // thus it needs to be loaded explicitly again |
| 505 | Label loaded; |
| 506 | __ jmp(&loaded); // don't lose current TOS |
| 507 | bool both = true_target.is_linked() && false_target.is_linked(); |
| 508 | // reincarnate "true", if necessary |
| 509 | if (true_target.is_linked()) { |
| 510 | __ bind(&true_target); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 511 | frame_->Push(Immediate(Factory::true_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 512 | } |
| 513 | // if both "true" and "false" need to be reincarnated, |
| 514 | // jump across code for "false" |
| 515 | if (both) |
| 516 | __ jmp(&loaded); |
| 517 | // reincarnate "false", if necessary |
| 518 | if (false_target.is_linked()) { |
| 519 | __ bind(&false_target); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 520 | frame_->Push(Immediate(Factory::false_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 521 | } |
| 522 | // everything is loaded at this point |
| 523 | __ bind(&loaded); |
| 524 | } |
| 525 | ASSERT(!has_cc()); |
| 526 | } |
| 527 | |
| 528 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 529 | void CodeGenerator::LoadGlobal() { |
| 530 | frame_->Push(GlobalObject()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 534 | void CodeGenerator::LoadGlobalReceiver(Register scratch) { |
| 535 | __ mov(scratch, GlobalObject()); |
| 536 | frame_->Push(FieldOperand(scratch, GlobalObject::kGlobalReceiverOffset)); |
| 537 | } |
| 538 | |
| 539 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 540 | // TODO(1241834): Get rid of this function in favor of just using Load, now |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 541 | // that we have the INSIDE_TYPEOF typeof state. => Need to handle global |
| 542 | // variables w/o reference errors elsewhere. |
| 543 | void CodeGenerator::LoadTypeofExpression(Expression* x) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 544 | Variable* variable = x->AsVariableProxy()->AsVariable(); |
| 545 | if (variable != NULL && !variable->is_this() && variable->is_global()) { |
| 546 | // NOTE: This is somewhat nasty. We force the compiler to load |
| 547 | // the variable as if through '<global>.<variable>' to make sure we |
| 548 | // do not get reference errors. |
| 549 | Slot global(variable, Slot::CONTEXT, Context::GLOBAL_INDEX); |
| 550 | Literal key(variable->name()); |
| 551 | // TODO(1241834): Fetch the position from the variable instead of using |
| 552 | // no position. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 553 | Property property(&global, &key, RelocInfo::kNoPosition); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 554 | Load(&property); |
| 555 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 556 | Load(x, INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 557 | } |
| 558 | } |
| 559 | |
| 560 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 561 | Reference::Reference(CodeGenerator* cgen, Expression* expression) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 562 | : cgen_(cgen), expression_(expression), type_(ILLEGAL) { |
| 563 | cgen->LoadReference(this); |
| 564 | } |
| 565 | |
| 566 | |
| 567 | Reference::~Reference() { |
| 568 | cgen_->UnloadReference(this); |
| 569 | } |
| 570 | |
| 571 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 572 | void CodeGenerator::LoadReference(Reference* ref) { |
| 573 | Comment cmnt(masm_, "[ LoadReference"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 574 | Expression* e = ref->expression(); |
| 575 | Property* property = e->AsProperty(); |
| 576 | Variable* var = e->AsVariableProxy()->AsVariable(); |
| 577 | |
| 578 | if (property != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 579 | // The expression is either a property or a variable proxy that rewrites |
| 580 | // to a property. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 581 | Load(property->obj()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 582 | // We use a named reference if the key is a literal symbol, unless it is |
| 583 | // a string that can be legally parsed as an integer. This is because |
| 584 | // otherwise we will not get into the slow case code that handles [] on |
| 585 | // String objects. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 586 | Literal* literal = property->key()->AsLiteral(); |
| 587 | uint32_t dummy; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 588 | if (literal != NULL && |
| 589 | literal->handle()->IsSymbol() && |
| 590 | !String::cast(*(literal->handle()))->AsArrayIndex(&dummy)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 591 | ref->set_type(Reference::NAMED); |
| 592 | } else { |
| 593 | Load(property->key()); |
| 594 | ref->set_type(Reference::KEYED); |
| 595 | } |
| 596 | } else if (var != NULL) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 597 | // The expression is a variable proxy that does not rewrite to a |
| 598 | // property. Global variables are treated as named property references. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 599 | if (var->is_global()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 600 | LoadGlobal(); |
| 601 | ref->set_type(Reference::NAMED); |
| 602 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 603 | ASSERT(var->slot() != NULL); |
| 604 | ref->set_type(Reference::SLOT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 605 | } |
| 606 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 607 | // Anything else is a runtime error. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 608 | Load(e); |
| 609 | __ CallRuntime(Runtime::kThrowReferenceError, 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 610 | } |
| 611 | } |
| 612 | |
| 613 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 614 | void CodeGenerator::UnloadReference(Reference* ref) { |
| 615 | // Pop a reference from the stack while preserving TOS. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 616 | Comment cmnt(masm_, "[ UnloadReference"); |
| 617 | int size = ref->size(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 618 | if (size == 1) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 619 | frame_->Pop(eax); |
| 620 | __ mov(frame_->Top(), eax); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 621 | } else if (size > 1) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 622 | frame_->Pop(eax); |
| 623 | frame_->Drop(size); |
| 624 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 625 | } |
| 626 | } |
| 627 | |
| 628 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 629 | class ToBooleanStub: public CodeStub { |
| 630 | public: |
| 631 | ToBooleanStub() { } |
| 632 | |
| 633 | void Generate(MacroAssembler* masm); |
| 634 | |
| 635 | private: |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 636 | Major MajorKey() { return ToBoolean; } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 637 | int MinorKey() { return 0; } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 638 | }; |
| 639 | |
| 640 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 641 | // ECMA-262, section 9.2, page 30: ToBoolean(). Pop the top of stack and |
| 642 | // convert it to a boolean in the condition code register or jump to |
| 643 | // 'false_target'/'true_target' as appropriate. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 644 | void CodeGenerator::ToBoolean(Label* true_target, Label* false_target) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 645 | Comment cmnt(masm_, "[ ToBoolean"); |
| 646 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 647 | // The value to convert should be popped from the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 648 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 649 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 650 | // Fast case checks. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 651 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 652 | // 'false' => false. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 653 | __ cmp(eax, Factory::false_value()); |
| 654 | __ j(equal, false_target); |
| 655 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 656 | // 'true' => true. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 657 | __ cmp(eax, Factory::true_value()); |
| 658 | __ j(equal, true_target); |
| 659 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 660 | // 'undefined' => false. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 661 | __ cmp(eax, Factory::undefined_value()); |
| 662 | __ j(equal, false_target); |
| 663 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 664 | // Smi => false iff zero. |
| 665 | ASSERT(kSmiTag == 0); |
| 666 | __ test(eax, Operand(eax)); |
| 667 | __ j(zero, false_target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 668 | __ test(eax, Immediate(kSmiTagMask)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 669 | __ j(zero, true_target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 670 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 671 | // Call the stub for all other cases. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 672 | frame_->Push(eax); // Undo the pop(eax) from above. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 673 | ToBooleanStub stub; |
| 674 | __ CallStub(&stub); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 675 | // Convert the result (eax) to condition code. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 676 | __ test(eax, Operand(eax)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 677 | |
| 678 | ASSERT(not_equal == not_zero); |
| 679 | cc_reg_ = not_equal; |
| 680 | } |
| 681 | |
| 682 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 683 | class FloatingPointHelper : public AllStatic { |
| 684 | public: |
| 685 | // Code pattern for loading floating point values. Input values must |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 686 | // be either smi or heap number objects (fp values). Requirements: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 687 | // operand_1 on TOS+1 , operand_2 on TOS+2; Returns operands as |
| 688 | // floating point numbers on FPU stack. |
| 689 | static void LoadFloatOperands(MacroAssembler* masm, Register scratch); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 690 | // Test if operands are smi or number objects (fp). Requirements: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 691 | // operand_1 in eax, operand_2 in edx; falls through on float |
| 692 | // operands, jumps to the non_float label otherwise. |
| 693 | static void CheckFloatOperands(MacroAssembler* masm, |
| 694 | Label* non_float, |
| 695 | Register scratch); |
| 696 | // Allocate a heap number in new space with undefined value. |
| 697 | // Returns tagged pointer in eax, or jumps to need_gc if new space is full. |
| 698 | static void AllocateHeapNumber(MacroAssembler* masm, |
| 699 | Label* need_gc, |
| 700 | Register scratch1, |
| 701 | Register scratch2); |
| 702 | }; |
| 703 | |
| 704 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 705 | // Flag that indicates whether or not the code for dealing with smis |
| 706 | // is inlined or should be dealt with in the stub. |
| 707 | enum GenericBinaryFlags { |
| 708 | SMI_CODE_IN_STUB, |
| 709 | SMI_CODE_INLINED |
| 710 | }; |
| 711 | |
| 712 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 713 | class GenericBinaryOpStub: public CodeStub { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 714 | public: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 715 | GenericBinaryOpStub(Token::Value op, |
| 716 | OverwriteMode mode, |
| 717 | GenericBinaryFlags flags) |
| 718 | : op_(op), mode_(mode), flags_(flags) { } |
| 719 | |
| 720 | void GenerateSmiCode(MacroAssembler* masm, Label* slow); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 721 | |
| 722 | private: |
| 723 | Token::Value op_; |
| 724 | OverwriteMode mode_; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 725 | GenericBinaryFlags flags_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 726 | |
| 727 | const char* GetName(); |
| 728 | |
| 729 | #ifdef DEBUG |
| 730 | void Print() { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 731 | PrintF("GenericBinaryOpStub (op %s), (mode %d, flags %d)\n", |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 732 | Token::String(op_), |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 733 | static_cast<int>(mode_), |
| 734 | static_cast<int>(flags_)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 735 | } |
| 736 | #endif |
| 737 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 738 | // Minor key encoding in 16 bits FOOOOOOOOOOOOOMM. |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 739 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 740 | class OpBits: public BitField<Token::Value, 2, 13> {}; |
| 741 | class FlagBits: public BitField<GenericBinaryFlags, 15, 1> {}; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 742 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 743 | Major MajorKey() { return GenericBinaryOp; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 744 | int MinorKey() { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 745 | // Encode the parameters in a unique 16 bit value. |
| 746 | return OpBits::encode(op_) | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 747 | ModeBits::encode(mode_) | |
| 748 | FlagBits::encode(flags_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 749 | } |
| 750 | void Generate(MacroAssembler* masm); |
| 751 | }; |
| 752 | |
| 753 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 754 | const char* GenericBinaryOpStub::GetName() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 755 | switch (op_) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 756 | case Token::ADD: return "GenericBinaryOpStub_ADD"; |
| 757 | case Token::SUB: return "GenericBinaryOpStub_SUB"; |
| 758 | case Token::MUL: return "GenericBinaryOpStub_MUL"; |
| 759 | case Token::DIV: return "GenericBinaryOpStub_DIV"; |
| 760 | case Token::BIT_OR: return "GenericBinaryOpStub_BIT_OR"; |
| 761 | case Token::BIT_AND: return "GenericBinaryOpStub_BIT_AND"; |
| 762 | case Token::BIT_XOR: return "GenericBinaryOpStub_BIT_XOR"; |
| 763 | case Token::SAR: return "GenericBinaryOpStub_SAR"; |
| 764 | case Token::SHL: return "GenericBinaryOpStub_SHL"; |
| 765 | case Token::SHR: return "GenericBinaryOpStub_SHR"; |
| 766 | default: return "GenericBinaryOpStub"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 767 | } |
| 768 | } |
| 769 | |
| 770 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 771 | class DeferredInlineBinaryOperation: public DeferredCode { |
| 772 | public: |
| 773 | DeferredInlineBinaryOperation(CodeGenerator* generator, |
| 774 | Token::Value op, |
| 775 | OverwriteMode mode, |
| 776 | GenericBinaryFlags flags) |
| 777 | : DeferredCode(generator), stub_(op, mode, flags) { } |
| 778 | |
| 779 | void GenerateInlineCode() { |
| 780 | stub_.GenerateSmiCode(masm(), enter()); |
| 781 | } |
| 782 | |
| 783 | virtual void Generate() { |
| 784 | __ push(ebx); |
| 785 | __ CallStub(&stub_); |
| 786 | // We must preserve the eax value here, because it will be written |
| 787 | // to the top-of-stack element when getting back to the fast case |
| 788 | // code. See comment in GenericBinaryOperation where |
| 789 | // deferred->exit() is bound. |
| 790 | __ push(eax); |
| 791 | } |
| 792 | |
| 793 | private: |
| 794 | GenericBinaryOpStub stub_; |
| 795 | }; |
| 796 | |
| 797 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 798 | void CodeGenerator::GenericBinaryOperation(Token::Value op, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 799 | StaticType* type, |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 800 | OverwriteMode overwrite_mode) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 801 | Comment cmnt(masm_, "[ BinaryOperation"); |
| 802 | Comment cmnt_token(masm_, Token::String(op)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 803 | |
| 804 | if (op == Token::COMMA) { |
| 805 | // Simply discard left value. |
| 806 | frame_->Pop(eax); |
| 807 | frame_->Pop(); |
| 808 | frame_->Push(eax); |
| 809 | return; |
| 810 | } |
| 811 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 812 | // Set the flags based on the operation, type and loop nesting level. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 813 | GenericBinaryFlags flags; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 814 | switch (op) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 815 | case Token::BIT_OR: |
| 816 | case Token::BIT_AND: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 817 | case Token::BIT_XOR: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 818 | case Token::SHL: |
| 819 | case Token::SHR: |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 820 | case Token::SAR: |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 821 | // Bit operations always assume they likely operate on Smis. Still only |
| 822 | // generate the inline Smi check code if this operation is part of a loop. |
| 823 | flags = (loop_nesting() > 0) |
| 824 | ? SMI_CODE_INLINED |
| 825 | : SMI_CODE_IN_STUB; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 826 | break; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 827 | |
| 828 | default: |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 829 | // By default only inline the Smi check code for likely smis if this |
| 830 | // operation is part of a loop. |
| 831 | flags = ((loop_nesting() > 0) && type->IsLikelySmi()) |
| 832 | ? SMI_CODE_INLINED |
| 833 | : SMI_CODE_IN_STUB; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 834 | break; |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | if (flags == SMI_CODE_INLINED) { |
| 838 | // Create a new deferred code for the slow-case part. |
| 839 | DeferredInlineBinaryOperation* deferred = |
| 840 | new DeferredInlineBinaryOperation(this, op, overwrite_mode, flags); |
| 841 | // Fetch the operands from the stack. |
| 842 | frame_->Pop(ebx); // get y |
| 843 | __ mov(eax, frame_->Top()); // get x |
| 844 | // Generate the inline part of the code. |
| 845 | deferred->GenerateInlineCode(); |
| 846 | // Put result back on the stack. It seems somewhat weird to let |
| 847 | // the deferred code jump back before the assignment to the frame |
| 848 | // top, but this is just to let the peephole optimizer get rid of |
| 849 | // more code. |
| 850 | __ bind(deferred->exit()); |
| 851 | __ mov(frame_->Top(), eax); |
| 852 | } else { |
| 853 | // Call the stub and push the result to the stack. |
| 854 | GenericBinaryOpStub stub(op, overwrite_mode, flags); |
| 855 | __ CallStub(&stub); |
| 856 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 857 | } |
| 858 | } |
| 859 | |
| 860 | |
| 861 | class DeferredInlinedSmiOperation: public DeferredCode { |
| 862 | public: |
| 863 | DeferredInlinedSmiOperation(CodeGenerator* generator, |
| 864 | Token::Value op, int value, |
| 865 | OverwriteMode overwrite_mode) : |
| 866 | DeferredCode(generator), op_(op), value_(value), |
| 867 | overwrite_mode_(overwrite_mode) { |
| 868 | set_comment("[ DeferredInlinedSmiOperation"); |
| 869 | } |
| 870 | virtual void Generate() { |
| 871 | __ push(eax); |
| 872 | __ push(Immediate(Smi::FromInt(value_))); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 873 | GenericBinaryOpStub igostub(op_, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 874 | __ CallStub(&igostub); |
| 875 | } |
| 876 | |
| 877 | private: |
| 878 | Token::Value op_; |
| 879 | int value_; |
| 880 | OverwriteMode overwrite_mode_; |
| 881 | }; |
| 882 | |
| 883 | |
| 884 | class DeferredInlinedSmiOperationReversed: public DeferredCode { |
| 885 | public: |
| 886 | DeferredInlinedSmiOperationReversed(CodeGenerator* generator, |
| 887 | Token::Value op, int value, |
| 888 | OverwriteMode overwrite_mode) : |
| 889 | DeferredCode(generator), op_(op), value_(value), |
| 890 | overwrite_mode_(overwrite_mode) { |
| 891 | set_comment("[ DeferredInlinedSmiOperationReversed"); |
| 892 | } |
| 893 | virtual void Generate() { |
| 894 | __ push(Immediate(Smi::FromInt(value_))); |
| 895 | __ push(eax); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 896 | GenericBinaryOpStub igostub(op_, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 897 | __ CallStub(&igostub); |
| 898 | } |
| 899 | |
| 900 | private: |
| 901 | Token::Value op_; |
| 902 | int value_; |
| 903 | OverwriteMode overwrite_mode_; |
| 904 | }; |
| 905 | |
| 906 | |
| 907 | class DeferredInlinedSmiAdd: public DeferredCode { |
| 908 | public: |
| 909 | DeferredInlinedSmiAdd(CodeGenerator* generator, int value, |
| 910 | OverwriteMode overwrite_mode) : |
| 911 | DeferredCode(generator), value_(value), overwrite_mode_(overwrite_mode) { |
| 912 | set_comment("[ DeferredInlinedSmiAdd"); |
| 913 | } |
| 914 | |
| 915 | virtual void Generate() { |
| 916 | // Undo the optimistic add operation and call the shared stub. |
| 917 | Immediate immediate(Smi::FromInt(value_)); |
| 918 | __ sub(Operand(eax), immediate); |
| 919 | __ push(eax); |
| 920 | __ push(immediate); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 921 | GenericBinaryOpStub igostub(Token::ADD, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 922 | __ CallStub(&igostub); |
| 923 | } |
| 924 | |
| 925 | private: |
| 926 | int value_; |
| 927 | OverwriteMode overwrite_mode_; |
| 928 | }; |
| 929 | |
| 930 | |
| 931 | class DeferredInlinedSmiAddReversed: public DeferredCode { |
| 932 | public: |
| 933 | DeferredInlinedSmiAddReversed(CodeGenerator* generator, int value, |
| 934 | OverwriteMode overwrite_mode) : |
| 935 | DeferredCode(generator), value_(value), overwrite_mode_(overwrite_mode) { |
| 936 | set_comment("[ DeferredInlinedSmiAddReversed"); |
| 937 | } |
| 938 | |
| 939 | virtual void Generate() { |
| 940 | // Undo the optimistic add operation and call the shared stub. |
| 941 | Immediate immediate(Smi::FromInt(value_)); |
| 942 | __ sub(Operand(eax), immediate); |
| 943 | __ push(immediate); |
| 944 | __ push(eax); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 945 | GenericBinaryOpStub igostub(Token::ADD, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 946 | __ CallStub(&igostub); |
| 947 | } |
| 948 | |
| 949 | private: |
| 950 | int value_; |
| 951 | OverwriteMode overwrite_mode_; |
| 952 | }; |
| 953 | |
| 954 | |
| 955 | class DeferredInlinedSmiSub: public DeferredCode { |
| 956 | public: |
| 957 | DeferredInlinedSmiSub(CodeGenerator* generator, int value, |
| 958 | OverwriteMode overwrite_mode) : |
| 959 | DeferredCode(generator), value_(value), overwrite_mode_(overwrite_mode) { |
| 960 | set_comment("[ DeferredInlinedSmiSub"); |
| 961 | } |
| 962 | |
| 963 | virtual void Generate() { |
| 964 | // Undo the optimistic sub operation and call the shared stub. |
| 965 | Immediate immediate(Smi::FromInt(value_)); |
| 966 | __ add(Operand(eax), immediate); |
| 967 | __ push(eax); |
| 968 | __ push(immediate); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 969 | GenericBinaryOpStub igostub(Token::SUB, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 970 | __ CallStub(&igostub); |
| 971 | } |
| 972 | |
| 973 | private: |
| 974 | int value_; |
| 975 | OverwriteMode overwrite_mode_; |
| 976 | }; |
| 977 | |
| 978 | |
| 979 | class DeferredInlinedSmiSubReversed: public DeferredCode { |
| 980 | public: |
| 981 | // tos_reg is used to save the TOS value before reversing the operands |
| 982 | // eax will contain the immediate value after undoing the optimistic sub. |
| 983 | DeferredInlinedSmiSubReversed(CodeGenerator* generator, Register tos_reg, |
| 984 | OverwriteMode overwrite_mode) : |
| 985 | DeferredCode(generator), tos_reg_(tos_reg), |
| 986 | overwrite_mode_(overwrite_mode) { |
| 987 | set_comment("[ DeferredInlinedSmiSubReversed"); |
| 988 | } |
| 989 | |
| 990 | virtual void Generate() { |
| 991 | // Undo the optimistic sub operation and call the shared stub. |
| 992 | __ add(eax, Operand(tos_reg_)); |
| 993 | __ push(eax); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 994 | __ push(tos_reg_); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 995 | GenericBinaryOpStub igostub(Token::SUB, overwrite_mode_, SMI_CODE_INLINED); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 996 | __ CallStub(&igostub); |
| 997 | } |
| 998 | |
| 999 | private: |
| 1000 | Register tos_reg_; |
| 1001 | OverwriteMode overwrite_mode_; |
| 1002 | }; |
| 1003 | |
| 1004 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1005 | void CodeGenerator::SmiOperation(Token::Value op, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1006 | StaticType* type, |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1007 | Handle<Object> value, |
| 1008 | bool reversed, |
| 1009 | OverwriteMode overwrite_mode) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1010 | // NOTE: This is an attempt to inline (a bit) more of the code for |
| 1011 | // some possible smi operations (like + and -) when (at least) one |
| 1012 | // of the operands is a literal smi. With this optimization, the |
| 1013 | // performance of the system is increased by ~15%, and the generated |
| 1014 | // code size is increased by ~1% (measured on a combination of |
| 1015 | // different benchmarks). |
| 1016 | |
| 1017 | // TODO(1217802): Optimize some special cases of operations |
| 1018 | // involving a smi literal (multiply by 2, shift by 0, etc.). |
| 1019 | |
| 1020 | // Get the literal value. |
| 1021 | int int_value = Smi::cast(*value)->value(); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1022 | ASSERT(is_intn(int_value, kMaxSmiInlinedBits)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1023 | |
| 1024 | switch (op) { |
| 1025 | case Token::ADD: { |
| 1026 | DeferredCode* deferred = NULL; |
| 1027 | if (!reversed) { |
| 1028 | deferred = new DeferredInlinedSmiAdd(this, int_value, overwrite_mode); |
| 1029 | } else { |
| 1030 | deferred = new DeferredInlinedSmiAddReversed(this, int_value, |
| 1031 | overwrite_mode); |
| 1032 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1033 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1034 | __ add(Operand(eax), Immediate(value)); |
| 1035 | __ j(overflow, deferred->enter(), not_taken); |
| 1036 | __ test(eax, Immediate(kSmiTagMask)); |
| 1037 | __ j(not_zero, deferred->enter(), not_taken); |
| 1038 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1039 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1040 | break; |
| 1041 | } |
| 1042 | |
| 1043 | case Token::SUB: { |
| 1044 | DeferredCode* deferred = NULL; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1045 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1046 | if (!reversed) { |
| 1047 | deferred = new DeferredInlinedSmiSub(this, int_value, overwrite_mode); |
| 1048 | __ sub(Operand(eax), Immediate(value)); |
| 1049 | } else { |
| 1050 | deferred = new DeferredInlinedSmiSubReversed(this, edx, overwrite_mode); |
| 1051 | __ mov(edx, Operand(eax)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1052 | __ mov(eax, Immediate(value)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1053 | __ sub(eax, Operand(edx)); |
| 1054 | } |
| 1055 | __ j(overflow, deferred->enter(), not_taken); |
| 1056 | __ test(eax, Immediate(kSmiTagMask)); |
| 1057 | __ j(not_zero, deferred->enter(), not_taken); |
| 1058 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1059 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1060 | break; |
| 1061 | } |
| 1062 | |
| 1063 | case Token::SAR: { |
| 1064 | if (reversed) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1065 | frame_->Pop(eax); |
| 1066 | frame_->Push(Immediate(value)); |
| 1067 | frame_->Push(eax); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1068 | GenericBinaryOperation(op, type, overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1069 | } else { |
| 1070 | int shift_value = int_value & 0x1f; // only least significant 5 bits |
| 1071 | DeferredCode* deferred = |
| 1072 | new DeferredInlinedSmiOperation(this, Token::SAR, shift_value, |
| 1073 | overwrite_mode); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1074 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1075 | __ test(eax, Immediate(kSmiTagMask)); |
| 1076 | __ j(not_zero, deferred->enter(), not_taken); |
| 1077 | __ sar(eax, shift_value); |
| 1078 | __ and_(eax, ~kSmiTagMask); |
| 1079 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1080 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1081 | } |
| 1082 | break; |
| 1083 | } |
| 1084 | |
| 1085 | case Token::SHR: { |
| 1086 | if (reversed) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1087 | frame_->Pop(eax); |
| 1088 | frame_->Push(Immediate(value)); |
| 1089 | frame_->Push(eax); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1090 | GenericBinaryOperation(op, type, overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1091 | } else { |
| 1092 | int shift_value = int_value & 0x1f; // only least significant 5 bits |
| 1093 | DeferredCode* deferred = |
| 1094 | new DeferredInlinedSmiOperation(this, Token::SHR, shift_value, |
| 1095 | overwrite_mode); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1096 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1097 | __ test(eax, Immediate(kSmiTagMask)); |
| 1098 | __ mov(ebx, Operand(eax)); |
| 1099 | __ j(not_zero, deferred->enter(), not_taken); |
| 1100 | __ sar(ebx, kSmiTagSize); |
| 1101 | __ shr(ebx, shift_value); |
| 1102 | __ test(ebx, Immediate(0xc0000000)); |
| 1103 | __ j(not_zero, deferred->enter(), not_taken); |
| 1104 | // tag result and store it in TOS (eax) |
| 1105 | ASSERT(kSmiTagSize == times_2); // adjust code if not the case |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1106 | __ lea(eax, Operand(ebx, ebx, times_1, kSmiTag)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1107 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1108 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1109 | } |
| 1110 | break; |
| 1111 | } |
| 1112 | |
| 1113 | case Token::SHL: { |
| 1114 | if (reversed) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1115 | frame_->Pop(eax); |
| 1116 | frame_->Push(Immediate(value)); |
| 1117 | frame_->Push(eax); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1118 | GenericBinaryOperation(op, type, overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1119 | } else { |
| 1120 | int shift_value = int_value & 0x1f; // only least significant 5 bits |
| 1121 | DeferredCode* deferred = |
| 1122 | new DeferredInlinedSmiOperation(this, Token::SHL, shift_value, |
| 1123 | overwrite_mode); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1124 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1125 | __ test(eax, Immediate(kSmiTagMask)); |
| 1126 | __ mov(ebx, Operand(eax)); |
| 1127 | __ j(not_zero, deferred->enter(), not_taken); |
| 1128 | __ sar(ebx, kSmiTagSize); |
| 1129 | __ shl(ebx, shift_value); |
| 1130 | __ lea(ecx, Operand(ebx, 0x40000000)); |
| 1131 | __ test(ecx, Immediate(0x80000000)); |
| 1132 | __ j(not_zero, deferred->enter(), not_taken); |
| 1133 | // tag result and store it in TOS (eax) |
| 1134 | ASSERT(kSmiTagSize == times_2); // adjust code if not the case |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1135 | __ lea(eax, Operand(ebx, ebx, times_1, kSmiTag)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1136 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1137 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1138 | } |
| 1139 | break; |
| 1140 | } |
| 1141 | |
| 1142 | case Token::BIT_OR: |
| 1143 | case Token::BIT_XOR: |
| 1144 | case Token::BIT_AND: { |
| 1145 | DeferredCode* deferred = NULL; |
| 1146 | if (!reversed) { |
| 1147 | deferred = new DeferredInlinedSmiOperation(this, op, int_value, |
| 1148 | overwrite_mode); |
| 1149 | } else { |
| 1150 | deferred = new DeferredInlinedSmiOperationReversed(this, op, int_value, |
| 1151 | overwrite_mode); |
| 1152 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1153 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1154 | __ test(eax, Immediate(kSmiTagMask)); |
| 1155 | __ j(not_zero, deferred->enter(), not_taken); |
| 1156 | if (op == Token::BIT_AND) { |
| 1157 | __ and_(Operand(eax), Immediate(value)); |
| 1158 | } else if (op == Token::BIT_XOR) { |
| 1159 | __ xor_(Operand(eax), Immediate(value)); |
| 1160 | } else { |
| 1161 | ASSERT(op == Token::BIT_OR); |
| 1162 | __ or_(Operand(eax), Immediate(value)); |
| 1163 | } |
| 1164 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1165 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1166 | break; |
| 1167 | } |
| 1168 | |
| 1169 | default: { |
| 1170 | if (!reversed) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1171 | frame_->Push(Immediate(value)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1172 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1173 | frame_->Pop(eax); |
| 1174 | frame_->Push(Immediate(value)); |
| 1175 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1176 | } |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1177 | GenericBinaryOperation(op, type, overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1178 | break; |
| 1179 | } |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1184 | class CompareStub: public CodeStub { |
| 1185 | public: |
| 1186 | CompareStub(Condition cc, bool strict) : cc_(cc), strict_(strict) { } |
| 1187 | |
| 1188 | void Generate(MacroAssembler* masm); |
| 1189 | |
| 1190 | private: |
| 1191 | Condition cc_; |
| 1192 | bool strict_; |
| 1193 | |
| 1194 | Major MajorKey() { return Compare; } |
| 1195 | |
| 1196 | int MinorKey() { |
| 1197 | // Encode the three parameters in a unique 16 bit value. |
| 1198 | ASSERT(static_cast<int>(cc_) < (1 << 15)); |
| 1199 | return (static_cast<int>(cc_) << 1) | (strict_ ? 1 : 0); |
| 1200 | } |
| 1201 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1202 | #ifdef DEBUG |
| 1203 | void Print() { |
| 1204 | PrintF("CompareStub (cc %d), (strict %s)\n", |
| 1205 | static_cast<int>(cc_), |
| 1206 | strict_ ? "true" : "false"); |
| 1207 | } |
| 1208 | #endif |
| 1209 | }; |
| 1210 | |
| 1211 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1212 | void CodeGenerator::Comparison(Condition cc, bool strict) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1213 | // Strict only makes sense for equality comparisons. |
| 1214 | ASSERT(!strict || cc == equal); |
| 1215 | |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1216 | // Implement '>' and '<=' by reversal to obtain ECMA-262 conversion order. |
| 1217 | if (cc == greater || cc == less_equal) { |
| 1218 | cc = ReverseCondition(cc); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1219 | frame_->Pop(edx); |
| 1220 | frame_->Pop(eax); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1221 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1222 | frame_->Pop(eax); |
| 1223 | frame_->Pop(edx); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 1224 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1225 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1226 | // Check for the smi case. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1227 | Label is_smi, done; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1228 | __ mov(ecx, Operand(eax)); |
| 1229 | __ or_(ecx, Operand(edx)); |
| 1230 | __ test(ecx, Immediate(kSmiTagMask)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1231 | __ j(zero, &is_smi, taken); |
| 1232 | |
| 1233 | // When non-smi, call out to the compare stub. "parameters" setup by |
| 1234 | // calling code in edx and eax and "result" is returned in the flags. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1235 | CompareStub stub(cc, strict); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1236 | __ CallStub(&stub); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1237 | if (cc == equal) { |
| 1238 | __ test(eax, Operand(eax)); |
| 1239 | } else { |
| 1240 | __ cmp(eax, 0); |
| 1241 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1242 | __ jmp(&done); |
| 1243 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1244 | // Test smi equality by pointer comparison. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1245 | __ bind(&is_smi); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1246 | __ cmp(edx, Operand(eax)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1247 | // Fall through to |done|. |
| 1248 | |
| 1249 | __ bind(&done); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1250 | cc_reg_ = cc; |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | class SmiComparisonDeferred: public DeferredCode { |
| 1255 | public: |
| 1256 | SmiComparisonDeferred(CodeGenerator* generator, |
| 1257 | Condition cc, |
| 1258 | bool strict, |
| 1259 | int value) |
| 1260 | : DeferredCode(generator), cc_(cc), strict_(strict), value_(value) { |
| 1261 | set_comment("[ ComparisonDeferred"); |
| 1262 | } |
| 1263 | virtual void Generate(); |
| 1264 | |
| 1265 | private: |
| 1266 | Condition cc_; |
| 1267 | bool strict_; |
| 1268 | int value_; |
| 1269 | }; |
| 1270 | |
| 1271 | |
| 1272 | void SmiComparisonDeferred::Generate() { |
| 1273 | CompareStub stub(cc_, strict_); |
| 1274 | // Setup parameters and call stub. |
| 1275 | __ mov(edx, Operand(eax)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1276 | __ Set(eax, Immediate(Smi::FromInt(value_))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1277 | __ CallStub(&stub); |
| 1278 | __ cmp(eax, 0); |
| 1279 | // "result" is returned in the flags |
| 1280 | } |
| 1281 | |
| 1282 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1283 | void CodeGenerator::SmiComparison(Condition cc, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1284 | Handle<Object> value, |
| 1285 | bool strict) { |
| 1286 | // Strict only makes sense for equality comparisons. |
| 1287 | ASSERT(!strict || cc == equal); |
| 1288 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1289 | int int_value = Smi::cast(*value)->value(); |
| 1290 | ASSERT(is_intn(int_value, kMaxSmiInlinedBits)); |
| 1291 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1292 | SmiComparisonDeferred* deferred = |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1293 | new SmiComparisonDeferred(this, cc, strict, int_value); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1294 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1295 | __ test(eax, Immediate(kSmiTagMask)); |
| 1296 | __ j(not_zero, deferred->enter(), not_taken); |
| 1297 | // Test smi equality by pointer comparison. |
| 1298 | __ cmp(Operand(eax), Immediate(value)); |
| 1299 | __ bind(deferred->exit()); |
| 1300 | cc_reg_ = cc; |
| 1301 | } |
| 1302 | |
| 1303 | |
| 1304 | class CallFunctionStub: public CodeStub { |
| 1305 | public: |
| 1306 | explicit CallFunctionStub(int argc) : argc_(argc) { } |
| 1307 | |
| 1308 | void Generate(MacroAssembler* masm); |
| 1309 | |
| 1310 | private: |
| 1311 | int argc_; |
| 1312 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1313 | #ifdef DEBUG |
| 1314 | void Print() { PrintF("CallFunctionStub (args %d)\n", argc_); } |
| 1315 | #endif |
| 1316 | |
| 1317 | Major MajorKey() { return CallFunction; } |
| 1318 | int MinorKey() { return argc_; } |
| 1319 | }; |
| 1320 | |
| 1321 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1322 | // Call the function just below TOS on the stack with the given |
| 1323 | // arguments. The receiver is the TOS. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1324 | void CodeGenerator::CallWithArguments(ZoneList<Expression*>* args, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1325 | int position) { |
| 1326 | // Push the arguments ("left-to-right") on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1327 | for (int i = 0; i < args->length(); i++) { |
| 1328 | Load(args->at(i)); |
| 1329 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1330 | |
| 1331 | // Record the position for debugging purposes. |
| 1332 | __ RecordPosition(position); |
| 1333 | |
| 1334 | // Use the shared code stub to call the function. |
| 1335 | CallFunctionStub call_function(args->length()); |
| 1336 | __ CallStub(&call_function); |
| 1337 | |
| 1338 | // Restore context and pop function from the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1339 | __ mov(esi, frame_->Context()); |
| 1340 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1344 | void CodeGenerator::Branch(bool if_true, Label* L) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1345 | ASSERT(has_cc()); |
| 1346 | Condition cc = if_true ? cc_reg_ : NegateCondition(cc_reg_); |
| 1347 | __ j(cc, L); |
| 1348 | cc_reg_ = no_condition; |
| 1349 | } |
| 1350 | |
| 1351 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1352 | void CodeGenerator::CheckStack() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1353 | if (FLAG_check_stack) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1354 | Label stack_is_ok; |
| 1355 | StackCheckStub stub; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1356 | ExternalReference stack_guard_limit = |
| 1357 | ExternalReference::address_of_stack_guard_limit(); |
| 1358 | __ cmp(esp, Operand::StaticVariable(stack_guard_limit)); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1359 | __ j(above_equal, &stack_is_ok, taken); |
| 1360 | __ CallStub(&stub); |
| 1361 | __ bind(&stack_is_ok); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1362 | } |
| 1363 | } |
| 1364 | |
| 1365 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1366 | void CodeGenerator::VisitBlock(Block* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1367 | Comment cmnt(masm_, "[ Block"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1368 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1369 | node->set_break_stack_height(break_stack_height_); |
| 1370 | VisitStatements(node->statements()); |
| 1371 | __ bind(node->break_target()); |
| 1372 | } |
| 1373 | |
| 1374 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1375 | void CodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) { |
| 1376 | frame_->Push(Immediate(pairs)); |
| 1377 | frame_->Push(esi); |
| 1378 | frame_->Push(Immediate(Smi::FromInt(is_eval() ? 1 : 0))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1379 | __ CallRuntime(Runtime::kDeclareGlobals, 3); |
| 1380 | // Return value is ignored. |
| 1381 | } |
| 1382 | |
| 1383 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1384 | void CodeGenerator::VisitDeclaration(Declaration* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1385 | Comment cmnt(masm_, "[ Declaration"); |
| 1386 | Variable* var = node->proxy()->var(); |
| 1387 | ASSERT(var != NULL); // must have been resolved |
| 1388 | Slot* slot = var->slot(); |
| 1389 | |
| 1390 | // If it was not possible to allocate the variable at compile time, |
| 1391 | // we need to "declare" it at runtime to make sure it actually |
| 1392 | // exists in the local context. |
| 1393 | if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 1394 | // Variables with a "LOOKUP" slot were introduced as non-locals |
| 1395 | // during variable resolution and must have mode DYNAMIC. |
| 1396 | ASSERT(var->mode() == Variable::DYNAMIC); |
| 1397 | // For now, just do a runtime call. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1398 | frame_->Push(esi); |
| 1399 | frame_->Push(Immediate(var->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1400 | // Declaration nodes are always introduced in one of two modes. |
| 1401 | ASSERT(node->mode() == Variable::VAR || node->mode() == Variable::CONST); |
| 1402 | PropertyAttributes attr = node->mode() == Variable::VAR ? NONE : READ_ONLY; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1403 | frame_->Push(Immediate(Smi::FromInt(attr))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1404 | // Push initial value, if any. |
| 1405 | // Note: For variables we must not push an initial value (such as |
| 1406 | // 'undefined') because we may have a (legal) redeclaration and we |
| 1407 | // must not destroy the current value. |
| 1408 | if (node->mode() == Variable::CONST) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1409 | frame_->Push(Immediate(Factory::the_hole_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1410 | } else if (node->fun() != NULL) { |
| 1411 | Load(node->fun()); |
| 1412 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1413 | frame_->Push(Immediate(0)); // no initial value! |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1414 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1415 | __ CallRuntime(Runtime::kDeclareContextSlot, 4); |
| 1416 | // Ignore the return value (declarations are statements). |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1417 | return; |
| 1418 | } |
| 1419 | |
| 1420 | ASSERT(!var->is_global()); |
| 1421 | |
| 1422 | // If we have a function or a constant, we need to initialize the variable. |
| 1423 | Expression* val = NULL; |
| 1424 | if (node->mode() == Variable::CONST) { |
| 1425 | val = new Literal(Factory::the_hole_value()); |
| 1426 | } else { |
| 1427 | val = node->fun(); // NULL if we don't have a function |
| 1428 | } |
| 1429 | |
| 1430 | if (val != NULL) { |
| 1431 | // Set initial value. |
| 1432 | Reference target(this, node->proxy()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1433 | ASSERT(target.is_slot()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1434 | Load(val); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1435 | target.SetValue(NOT_CONST_INIT); |
| 1436 | // Get rid of the assigned value (declarations are statements). It's |
| 1437 | // safe to pop the value lying on top of the reference before unloading |
| 1438 | // the reference itself (which preserves the top of stack) because we |
| 1439 | // know that it is a zero-sized reference. |
| 1440 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1441 | } |
| 1442 | } |
| 1443 | |
| 1444 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1445 | void CodeGenerator::VisitExpressionStatement(ExpressionStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1446 | Comment cmnt(masm_, "[ ExpressionStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1447 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1448 | Expression* expression = node->expression(); |
| 1449 | expression->MarkAsStatement(); |
| 1450 | Load(expression); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1451 | // Remove the lingering expression result from the top of stack. |
| 1452 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1456 | void CodeGenerator::VisitEmptyStatement(EmptyStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1457 | Comment cmnt(masm_, "// EmptyStatement"); |
| 1458 | // nothing to do |
| 1459 | } |
| 1460 | |
| 1461 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1462 | void CodeGenerator::VisitIfStatement(IfStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1463 | Comment cmnt(masm_, "[ IfStatement"); |
| 1464 | // Generate different code depending on which |
| 1465 | // parts of the if statement are present or not. |
| 1466 | bool has_then_stm = node->HasThenStatement(); |
| 1467 | bool has_else_stm = node->HasElseStatement(); |
| 1468 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1469 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1470 | Label exit; |
| 1471 | if (has_then_stm && has_else_stm) { |
| 1472 | Label then; |
| 1473 | Label else_; |
| 1474 | // if (cond) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1475 | LoadCondition(node->condition(), NOT_INSIDE_TYPEOF, &then, &else_, true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1476 | Branch(false, &else_); |
| 1477 | // then |
| 1478 | __ bind(&then); |
| 1479 | Visit(node->then_statement()); |
| 1480 | __ jmp(&exit); |
| 1481 | // else |
| 1482 | __ bind(&else_); |
| 1483 | Visit(node->else_statement()); |
| 1484 | |
| 1485 | } else if (has_then_stm) { |
| 1486 | ASSERT(!has_else_stm); |
| 1487 | Label then; |
| 1488 | // if (cond) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1489 | LoadCondition(node->condition(), NOT_INSIDE_TYPEOF, &then, &exit, true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1490 | Branch(false, &exit); |
| 1491 | // then |
| 1492 | __ bind(&then); |
| 1493 | Visit(node->then_statement()); |
| 1494 | |
| 1495 | } else if (has_else_stm) { |
| 1496 | ASSERT(!has_then_stm); |
| 1497 | Label else_; |
| 1498 | // if (!cond) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1499 | LoadCondition(node->condition(), NOT_INSIDE_TYPEOF, &exit, &else_, true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1500 | Branch(true, &exit); |
| 1501 | // else |
| 1502 | __ bind(&else_); |
| 1503 | Visit(node->else_statement()); |
| 1504 | |
| 1505 | } else { |
| 1506 | ASSERT(!has_then_stm && !has_else_stm); |
| 1507 | // if (cond) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1508 | LoadCondition(node->condition(), NOT_INSIDE_TYPEOF, &exit, &exit, false); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1509 | if (has_cc()) { |
| 1510 | cc_reg_ = no_condition; |
| 1511 | } else { |
| 1512 | // No cc value set up, that means the boolean was pushed. |
| 1513 | // Pop it again, since it is not going to be used. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1514 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | // end |
| 1519 | __ bind(&exit); |
| 1520 | } |
| 1521 | |
| 1522 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1523 | void CodeGenerator::CleanStack(int num_bytes) { |
| 1524 | ASSERT(num_bytes % kPointerSize == 0); |
| 1525 | frame_->Drop(num_bytes / kPointerSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1529 | void CodeGenerator::VisitContinueStatement(ContinueStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1530 | Comment cmnt(masm_, "[ ContinueStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1531 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1532 | CleanStack(break_stack_height_ - node->target()->break_stack_height()); |
| 1533 | __ jmp(node->target()->continue_target()); |
| 1534 | } |
| 1535 | |
| 1536 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1537 | void CodeGenerator::VisitBreakStatement(BreakStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1538 | Comment cmnt(masm_, "[ BreakStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1539 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1540 | CleanStack(break_stack_height_ - node->target()->break_stack_height()); |
| 1541 | __ jmp(node->target()->break_target()); |
| 1542 | } |
| 1543 | |
| 1544 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1545 | void CodeGenerator::VisitReturnStatement(ReturnStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1546 | Comment cmnt(masm_, "[ ReturnStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1547 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1548 | Load(node->expression()); |
| 1549 | |
| 1550 | // Move the function result into eax |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1551 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1552 | |
| 1553 | // If we're inside a try statement or the return instruction |
| 1554 | // sequence has been generated, we just jump to that |
| 1555 | // point. Otherwise, we generate the return instruction sequence and |
| 1556 | // bind the function return label. |
| 1557 | if (is_inside_try_ || function_return_.is_bound()) { |
| 1558 | __ jmp(&function_return_); |
| 1559 | } else { |
| 1560 | __ bind(&function_return_); |
| 1561 | if (FLAG_trace) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1562 | frame_->Push(eax); // undo the pop(eax) from above |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1563 | __ CallRuntime(Runtime::kTraceExit, 1); |
| 1564 | } |
| 1565 | |
| 1566 | // Add a label for checking the size of the code used for returning. |
| 1567 | Label check_exit_codesize; |
| 1568 | __ bind(&check_exit_codesize); |
| 1569 | |
| 1570 | // Leave the frame and return popping the arguments and the |
| 1571 | // receiver. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1572 | frame_->Exit(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1573 | __ ret((scope_->num_parameters() + 1) * kPointerSize); |
| 1574 | |
| 1575 | // Check that the size of the code used for returning matches what is |
| 1576 | // expected by the debugger. |
| 1577 | ASSERT_EQ(Debug::kIa32JSReturnSequenceLength, |
| 1578 | __ SizeOfCodeGeneratedSince(&check_exit_codesize)); |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1583 | void CodeGenerator::VisitWithEnterStatement(WithEnterStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1584 | Comment cmnt(masm_, "[ WithEnterStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1585 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1586 | Load(node->expression()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1587 | __ CallRuntime(Runtime::kPushContext, 1); |
| 1588 | |
| 1589 | if (kDebug) { |
| 1590 | Label verified_true; |
| 1591 | // Verify eax and esi are the same in debug mode |
| 1592 | __ cmp(eax, Operand(esi)); |
| 1593 | __ j(equal, &verified_true); |
| 1594 | __ int3(); |
| 1595 | __ bind(&verified_true); |
| 1596 | } |
| 1597 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1598 | // Update context local. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1599 | __ mov(frame_->Context(), esi); |
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::VisitWithExitStatement(WithExitStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1604 | Comment cmnt(masm_, "[ WithExitStatement"); |
| 1605 | // Pop context. |
| 1606 | __ mov(esi, ContextOperand(esi, Context::PREVIOUS_INDEX)); |
| 1607 | // Update context local. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1608 | __ mov(frame_->Context(), esi); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1609 | } |
| 1610 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1611 | int CodeGenerator::FastCaseSwitchMaxOverheadFactor() { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1612 | return kFastSwitchMaxOverheadFactor; |
| 1613 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1614 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1615 | int CodeGenerator::FastCaseSwitchMinCaseCount() { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1616 | return kFastSwitchMinCaseCount; |
| 1617 | } |
| 1618 | |
| 1619 | // Generate a computed jump to a switch case. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1620 | void CodeGenerator::GenerateFastCaseSwitchJumpTable( |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1621 | SwitchStatement* node, |
| 1622 | int min_index, |
| 1623 | int range, |
| 1624 | Label* fail_label, |
| 1625 | Vector<Label*> case_targets, |
| 1626 | Vector<Label> case_labels) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1627 | // Notice: Internal references, used by both the jmp instruction and |
| 1628 | // the table entries, need to be relocated if the buffer grows. This |
| 1629 | // prevents the forward use of Labels, since a displacement cannot |
| 1630 | // survive relocation, and it also cannot safely be distinguished |
| 1631 | // from a real address. Instead we put in zero-values as |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1632 | // placeholders, and fill in the addresses after the labels have been |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1633 | // bound. |
| 1634 | |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 1635 | frame_->Pop(eax); // supposed Smi |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1636 | // check range of value, if outside [0..length-1] jump to default/end label. |
| 1637 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 1638 | |
| 1639 | // Test whether input is a HeapNumber that is really a Smi |
| 1640 | Label is_smi; |
| 1641 | __ test(eax, Immediate(kSmiTagMask)); |
| 1642 | __ j(equal, &is_smi); |
| 1643 | // It's a heap object, not a Smi or a Failure |
| 1644 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 1645 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 1646 | __ cmp(ebx, HEAP_NUMBER_TYPE); |
| 1647 | __ j(not_equal, fail_label); |
| 1648 | // eax points to a heap number. |
| 1649 | __ push(eax); |
| 1650 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 1651 | __ bind(&is_smi); |
| 1652 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1653 | if (min_index != 0) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1654 | __ sub(Operand(eax), Immediate(min_index << kSmiTagSize)); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1655 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1656 | __ test(eax, Immediate(0x80000000 | kSmiTagMask)); // negative or not Smi |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1657 | __ j(not_equal, fail_label, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1658 | __ cmp(eax, range << kSmiTagSize); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1659 | __ j(greater_equal, fail_label, not_taken); |
| 1660 | |
| 1661 | // 0 is placeholder. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1662 | __ jmp(Operand(eax, eax, times_1, 0x0, RelocInfo::INTERNAL_REFERENCE)); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1663 | // calculate address to overwrite later with actual address of table. |
| 1664 | int32_t jump_table_ref = __ pc_offset() - sizeof(int32_t); |
| 1665 | |
| 1666 | __ Align(4); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1667 | Label table_start; |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1668 | __ bind(&table_start); |
| 1669 | __ WriteInternalReference(jump_table_ref, table_start); |
| 1670 | |
| 1671 | for (int i = 0; i < range; i++) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1672 | // table entry, 0 is placeholder for case address |
| 1673 | __ dd(0x0, RelocInfo::INTERNAL_REFERENCE); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1674 | } |
| 1675 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1676 | GenerateFastCaseSwitchCases(node, case_labels); |
| 1677 | |
| 1678 | for (int i = 0, entry_pos = table_start.pos(); |
| 1679 | i < range; i++, entry_pos += sizeof(uint32_t)) { |
| 1680 | __ WriteInternalReference(entry_pos, *case_targets[i]); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1681 | } |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1682 | } |
| 1683 | |
| 1684 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1685 | void CodeGenerator::VisitSwitchStatement(SwitchStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1686 | Comment cmnt(masm_, "[ SwitchStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1687 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1688 | node->set_break_stack_height(break_stack_height_); |
| 1689 | |
| 1690 | Load(node->tag()); |
| 1691 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1692 | if (TryGenerateFastCaseSwitchStatement(node)) { |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1693 | return; |
| 1694 | } |
| 1695 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1696 | Label next, fall_through, default_case; |
| 1697 | ZoneList<CaseClause*>* cases = node->cases(); |
| 1698 | int length = cases->length(); |
| 1699 | |
| 1700 | for (int i = 0; i < length; i++) { |
| 1701 | CaseClause* clause = cases->at(i); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1702 | Comment cmnt(masm_, "[ case clause"); |
| 1703 | |
| 1704 | if (clause->is_default()) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1705 | // Continue matching cases. The program will execute the default case's |
| 1706 | // statements if it does not match any of the cases. |
| 1707 | __ jmp(&next); |
| 1708 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1709 | // Bind the default case label, so we can branch to it when we |
| 1710 | // have compared against all other cases. |
| 1711 | ASSERT(default_case.is_unused()); // at most one default clause |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1712 | __ bind(&default_case); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1713 | } else { |
| 1714 | __ bind(&next); |
| 1715 | next.Unuse(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1716 | __ mov(eax, frame_->Top()); |
| 1717 | frame_->Push(eax); // duplicate TOS |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1718 | Load(clause->label()); |
| 1719 | Comparison(equal, true); |
| 1720 | Branch(false, &next); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1721 | } |
| 1722 | |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1723 | // Entering the case statement for the first time. Remove the switch value |
| 1724 | // from the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1725 | frame_->Pop(eax); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1726 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1727 | // Generate code for the body. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1728 | // This is also the target for the fall through from the previous case's |
| 1729 | // statements which has to skip over the matching code and the popping of |
| 1730 | // the switch value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1731 | __ bind(&fall_through); |
| 1732 | fall_through.Unuse(); |
| 1733 | VisitStatements(clause->statements()); |
| 1734 | __ jmp(&fall_through); |
| 1735 | } |
| 1736 | |
| 1737 | __ bind(&next); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1738 | // Reached the end of the case statements without matching any of the cases. |
| 1739 | if (default_case.is_bound()) { |
| 1740 | // A default case exists -> execute its statements. |
| 1741 | __ jmp(&default_case); |
| 1742 | } else { |
| 1743 | // Remove the switch value from the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1744 | frame_->Pop(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 1745 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1746 | |
| 1747 | __ bind(&fall_through); |
| 1748 | __ bind(node->break_target()); |
| 1749 | } |
| 1750 | |
| 1751 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1752 | void CodeGenerator::VisitLoopStatement(LoopStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1753 | Comment cmnt(masm_, "[ LoopStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1754 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1755 | node->set_break_stack_height(break_stack_height_); |
| 1756 | |
| 1757 | // simple condition analysis |
| 1758 | enum { ALWAYS_TRUE, ALWAYS_FALSE, DONT_KNOW } info = DONT_KNOW; |
| 1759 | if (node->cond() == NULL) { |
| 1760 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 1761 | info = ALWAYS_TRUE; |
| 1762 | } else { |
| 1763 | Literal* lit = node->cond()->AsLiteral(); |
| 1764 | if (lit != NULL) { |
| 1765 | if (lit->IsTrue()) { |
| 1766 | info = ALWAYS_TRUE; |
| 1767 | } else if (lit->IsFalse()) { |
| 1768 | info = ALWAYS_FALSE; |
| 1769 | } |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | Label loop, entry; |
| 1774 | |
| 1775 | // init |
| 1776 | if (node->init() != NULL) { |
| 1777 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 1778 | Visit(node->init()); |
| 1779 | } |
| 1780 | if (node->type() != LoopStatement::DO_LOOP && info != ALWAYS_TRUE) { |
| 1781 | __ jmp(&entry); |
| 1782 | } |
| 1783 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1784 | IncrementLoopNesting(); |
| 1785 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1786 | // body |
| 1787 | __ bind(&loop); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1788 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1789 | Visit(node->body()); |
| 1790 | |
| 1791 | // next |
| 1792 | __ bind(node->continue_target()); |
| 1793 | if (node->next() != NULL) { |
| 1794 | // Record source position of the statement as this code which is after the |
| 1795 | // code for the body actually belongs to the loop statement and not the |
| 1796 | // body. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1797 | RecordStatementPosition(node); |
| 1798 | __ RecordPosition(node->statement_pos()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1799 | ASSERT(node->type() == LoopStatement::FOR_LOOP); |
| 1800 | Visit(node->next()); |
| 1801 | } |
| 1802 | |
| 1803 | // cond |
| 1804 | __ bind(&entry); |
| 1805 | switch (info) { |
| 1806 | case ALWAYS_TRUE: |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1807 | __ jmp(&loop); |
| 1808 | break; |
| 1809 | case ALWAYS_FALSE: |
| 1810 | break; |
| 1811 | case DONT_KNOW: |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1812 | LoadCondition(node->cond(), NOT_INSIDE_TYPEOF, &loop, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1813 | node->break_target(), true); |
| 1814 | Branch(true, &loop); |
| 1815 | break; |
| 1816 | } |
| 1817 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 1818 | DecrementLoopNesting(); |
| 1819 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1820 | // exit |
| 1821 | __ bind(node->break_target()); |
| 1822 | } |
| 1823 | |
| 1824 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1825 | void CodeGenerator::VisitForInStatement(ForInStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1826 | Comment cmnt(masm_, "[ ForInStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 1827 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1828 | |
| 1829 | // We keep stuff on the stack while the body is executing. |
| 1830 | // Record it, so that a break/continue crossing this statement |
| 1831 | // can restore the stack. |
| 1832 | const int kForInStackSize = 5 * kPointerSize; |
| 1833 | break_stack_height_ += kForInStackSize; |
| 1834 | node->set_break_stack_height(break_stack_height_); |
| 1835 | |
| 1836 | Label loop, next, entry, cleanup, exit, primitive, jsobject; |
| 1837 | Label end_del_check, fixed_array; |
| 1838 | |
| 1839 | // Get the object to enumerate over (converted to JSObject). |
| 1840 | Load(node->enumerable()); |
| 1841 | |
| 1842 | // Both SpiderMonkey and kjs ignore null and undefined in contrast |
| 1843 | // to the specification. 12.6.4 mandates a call to ToObject. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1844 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1845 | |
| 1846 | // eax: value to be iterated over |
| 1847 | __ cmp(eax, Factory::undefined_value()); |
| 1848 | __ j(equal, &exit); |
| 1849 | __ cmp(eax, Factory::null_value()); |
| 1850 | __ j(equal, &exit); |
| 1851 | |
| 1852 | // Stack layout in body: |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 1853 | // [iteration counter (smi)] <- slot 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1854 | // [length of array] <- slot 1 |
| 1855 | // [FixedArray] <- slot 2 |
| 1856 | // [Map or 0] <- slot 3 |
| 1857 | // [Object] <- slot 4 |
| 1858 | |
| 1859 | // Check if enumerable is already a JSObject |
| 1860 | // eax: value to be iterated over |
| 1861 | __ test(eax, Immediate(kSmiTagMask)); |
| 1862 | __ j(zero, &primitive); |
| 1863 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 1864 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 1865 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1866 | __ j(above_equal, &jsobject); |
| 1867 | |
| 1868 | __ bind(&primitive); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1869 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1870 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 1871 | // function call returns the value in eax, which is where we want it below |
| 1872 | |
| 1873 | |
| 1874 | __ bind(&jsobject); |
| 1875 | |
| 1876 | // Get the set of properties (as a FixedArray or Map). |
| 1877 | // eax: value to be iterated over |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1878 | frame_->Push(eax); // push the object being iterated over (slot 4) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1879 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1880 | frame_->Push(eax); // push the Object (slot 4) for the runtime call |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1881 | __ CallRuntime(Runtime::kGetPropertyNamesFast, 1); |
| 1882 | |
| 1883 | // If we got a Map, we can do a fast modification check. |
| 1884 | // Otherwise, we got a FixedArray, and we have to do a slow check. |
| 1885 | // eax: map or fixed array (result from call to |
| 1886 | // Runtime::kGetPropertyNamesFast) |
| 1887 | __ mov(edx, Operand(eax)); |
| 1888 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 1889 | __ cmp(ecx, Factory::meta_map()); |
| 1890 | __ j(not_equal, &fixed_array); |
| 1891 | |
| 1892 | // Get enum cache |
| 1893 | // eax: map (result from call to Runtime::kGetPropertyNamesFast) |
| 1894 | __ mov(ecx, Operand(eax)); |
| 1895 | __ mov(ecx, FieldOperand(ecx, Map::kInstanceDescriptorsOffset)); |
| 1896 | // Get the bridge array held in the enumeration index field. |
| 1897 | __ mov(ecx, FieldOperand(ecx, DescriptorArray::kEnumerationIndexOffset)); |
| 1898 | // Get the cache from the bridge array. |
| 1899 | __ mov(edx, FieldOperand(ecx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 1900 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1901 | frame_->Push(eax); // <- slot 3 |
| 1902 | frame_->Push(edx); // <- slot 2 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1903 | __ mov(eax, FieldOperand(edx, FixedArray::kLengthOffset)); |
| 1904 | __ shl(eax, kSmiTagSize); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1905 | frame_->Push(eax); // <- slot 1 |
| 1906 | frame_->Push(Immediate(Smi::FromInt(0))); // <- slot 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1907 | __ jmp(&entry); |
| 1908 | |
| 1909 | |
| 1910 | __ bind(&fixed_array); |
| 1911 | |
| 1912 | // eax: fixed array (result from call to Runtime::kGetPropertyNamesFast) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1913 | frame_->Push(Immediate(Smi::FromInt(0))); // <- slot 3 |
| 1914 | frame_->Push(eax); // <- slot 2 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1915 | |
| 1916 | // Push the length of the array and the initial index onto the stack. |
| 1917 | __ mov(eax, FieldOperand(eax, FixedArray::kLengthOffset)); |
| 1918 | __ shl(eax, kSmiTagSize); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1919 | frame_->Push(eax); // <- slot 1 |
| 1920 | frame_->Push(Immediate(Smi::FromInt(0))); // <- slot 0 |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1921 | __ jmp(&entry); |
| 1922 | |
| 1923 | // Body. |
| 1924 | __ bind(&loop); |
| 1925 | Visit(node->body()); |
| 1926 | |
| 1927 | // Next. |
| 1928 | __ bind(node->continue_target()); |
| 1929 | __ bind(&next); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1930 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1931 | __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1932 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1933 | |
| 1934 | // Condition. |
| 1935 | __ bind(&entry); |
| 1936 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1937 | __ mov(eax, frame_->Element(0)); // load the current count |
| 1938 | __ cmp(eax, frame_->Element(1)); // compare to the array length |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1939 | __ j(above_equal, &cleanup); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1940 | |
| 1941 | // Get the i'th entry of the array. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1942 | __ mov(edx, frame_->Element(2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1943 | __ mov(ebx, Operand(edx, eax, times_2, |
| 1944 | FixedArray::kHeaderSize - kHeapObjectTag)); |
| 1945 | |
| 1946 | // Get the expected map from the stack or a zero map in the |
| 1947 | // permanent slow case eax: current iteration count ebx: i'th entry |
| 1948 | // of the enum cache |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1949 | __ mov(edx, frame_->Element(3)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1950 | // Check if the expected map still matches that of the enumerable. |
| 1951 | // If not, we have to filter the key. |
| 1952 | // eax: current iteration count |
| 1953 | // ebx: i'th entry of the enum cache |
| 1954 | // edx: expected map value |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1955 | __ mov(ecx, frame_->Element(4)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1956 | __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 1957 | __ cmp(ecx, Operand(edx)); |
| 1958 | __ j(equal, &end_del_check); |
| 1959 | |
| 1960 | // Convert the entry to a string (or null if it isn't a property anymore). |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1961 | frame_->Push(frame_->Element(4)); // push enumerable |
| 1962 | frame_->Push(ebx); // push entry |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1963 | __ InvokeBuiltin(Builtins::FILTER_KEY, CALL_FUNCTION); |
| 1964 | __ mov(ebx, Operand(eax)); |
| 1965 | |
| 1966 | // If the property has been removed while iterating, we just skip it. |
| 1967 | __ cmp(ebx, Factory::null_value()); |
| 1968 | __ j(equal, &next); |
| 1969 | |
| 1970 | |
| 1971 | __ bind(&end_del_check); |
| 1972 | |
| 1973 | // Store the entry in the 'each' expression and take another spin in the loop. |
| 1974 | // edx: i'th entry of the enum cache (or string there of) |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1975 | frame_->Push(ebx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1976 | { Reference each(this, node->each()); |
| 1977 | if (!each.is_illegal()) { |
| 1978 | if (each.size() > 0) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1979 | frame_->Push(frame_->Element(each.size())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1980 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1981 | // If the reference was to a slot we rely on the convenient property |
| 1982 | // that it doesn't matter whether a value (eg, ebx pushed above) is |
| 1983 | // right on top of or right underneath a zero-sized reference. |
| 1984 | each.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1985 | if (each.size() > 0) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1986 | // It's safe to pop the value lying on top of the reference before |
| 1987 | // unloading the reference itself (which preserves the top of stack, |
| 1988 | // ie, now the topmost value of the non-zero sized reference), since |
| 1989 | // we will discard the top of stack after unloading the reference |
| 1990 | // anyway. |
| 1991 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1992 | } |
| 1993 | } |
| 1994 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 1995 | // Discard the i'th entry pushed above or else the remainder of the |
| 1996 | // reference, whichever is currently on top of the stack. |
| 1997 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1998 | CheckStack(); // TODO(1222600): ignore if body contains calls. |
| 1999 | __ jmp(&loop); |
| 2000 | |
| 2001 | // Cleanup. |
| 2002 | __ bind(&cleanup); |
| 2003 | __ bind(node->break_target()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2004 | frame_->Drop(5); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2005 | |
| 2006 | // Exit. |
| 2007 | __ bind(&exit); |
| 2008 | |
| 2009 | break_stack_height_ -= kForInStackSize; |
| 2010 | } |
| 2011 | |
| 2012 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2013 | void CodeGenerator::VisitTryCatch(TryCatch* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2014 | Comment cmnt(masm_, "[ TryCatch"); |
| 2015 | |
| 2016 | Label try_block, exit; |
| 2017 | |
| 2018 | __ call(&try_block); |
| 2019 | // --- Catch block --- |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2020 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2021 | |
| 2022 | // Store the caught exception in the catch variable. |
| 2023 | { Reference ref(this, node->catch_var()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2024 | ASSERT(ref.is_slot()); |
| 2025 | // Load the exception to the top of the stack. Here we make use of the |
| 2026 | // convenient property that it doesn't matter whether a value is |
| 2027 | // immediately on top of or underneath a zero-sized reference. |
| 2028 | ref.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2029 | } |
| 2030 | |
| 2031 | // Remove the exception from the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2032 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2033 | |
| 2034 | VisitStatements(node->catch_block()->statements()); |
| 2035 | __ jmp(&exit); |
| 2036 | |
| 2037 | |
| 2038 | // --- Try block --- |
| 2039 | __ bind(&try_block); |
| 2040 | |
| 2041 | __ PushTryHandler(IN_JAVASCRIPT, TRY_CATCH_HANDLER); |
| 2042 | // TODO(1222589): remove the reliance of PushTryHandler on a cached TOS |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2043 | frame_->Push(eax); // |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2044 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2045 | // Shadow the labels for all escapes from the try block, including |
| 2046 | // returns. During shadowing, the original label is hidden as the |
| 2047 | // LabelShadow and operations on the original actually affect the |
| 2048 | // shadowing label. |
| 2049 | // |
| 2050 | // We should probably try to unify the escaping labels and the return |
| 2051 | // label. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2052 | int nof_escapes = node->escaping_labels()->length(); |
| 2053 | List<LabelShadow*> shadows(1 + nof_escapes); |
| 2054 | shadows.Add(new LabelShadow(&function_return_)); |
| 2055 | for (int i = 0; i < nof_escapes; i++) { |
| 2056 | shadows.Add(new LabelShadow(node->escaping_labels()->at(i))); |
| 2057 | } |
| 2058 | |
| 2059 | // Generate code for the statements in the try block. |
| 2060 | bool was_inside_try = is_inside_try_; |
| 2061 | is_inside_try_ = true; |
| 2062 | VisitStatements(node->try_block()->statements()); |
| 2063 | is_inside_try_ = was_inside_try; |
| 2064 | |
| 2065 | // Stop the introduced shadowing and count the number of required unlinks. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2066 | // After shadowing stops, the original labels are unshadowed and the |
| 2067 | // LabelShadows represent the formerly shadowing labels. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2068 | int nof_unlinks = 0; |
| 2069 | for (int i = 0; i <= nof_escapes; i++) { |
| 2070 | shadows[i]->StopShadowing(); |
| 2071 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 2072 | } |
| 2073 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2074 | // Get an external reference to the handler address. |
| 2075 | ExternalReference handler_address(Top::k_handler_address); |
| 2076 | |
| 2077 | // Make sure that there's nothing left on the stack above the |
| 2078 | // handler structure. |
| 2079 | if (FLAG_debug_code) { |
| 2080 | __ mov(eax, Operand::StaticVariable(handler_address)); |
| 2081 | __ lea(eax, Operand(eax, StackHandlerConstants::kAddressDisplacement)); |
| 2082 | __ cmp(esp, Operand(eax)); |
| 2083 | __ Assert(equal, "stack pointer should point to top handler"); |
| 2084 | } |
| 2085 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2086 | // Unlink from try chain. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2087 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2088 | __ mov(Operand::StaticVariable(handler_address), eax); // TOS == next_sp |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2089 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2090 | // next_sp popped. |
| 2091 | if (nof_unlinks > 0) __ jmp(&exit); |
| 2092 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2093 | // Generate unlink code for the (formerly) shadowing labels that have been |
| 2094 | // jumped to. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2095 | for (int i = 0; i <= nof_escapes; i++) { |
| 2096 | if (shadows[i]->is_linked()) { |
| 2097 | // Unlink from try chain; be careful not to destroy the TOS. |
| 2098 | __ bind(shadows[i]); |
| 2099 | |
| 2100 | // Reload sp from the top handler, because some statements that we |
| 2101 | // break from (eg, for...in) may have left stuff on the stack. |
| 2102 | __ mov(edx, Operand::StaticVariable(handler_address)); |
| 2103 | const int kNextOffset = StackHandlerConstants::kNextOffset + |
| 2104 | StackHandlerConstants::kAddressDisplacement; |
| 2105 | __ lea(esp, Operand(edx, kNextOffset)); |
| 2106 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2107 | frame_->Pop(Operand::StaticVariable(handler_address)); |
| 2108 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2109 | // next_sp popped. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2110 | __ jmp(shadows[i]->original_label()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2111 | } |
| 2112 | } |
| 2113 | |
| 2114 | __ bind(&exit); |
| 2115 | } |
| 2116 | |
| 2117 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2118 | void CodeGenerator::VisitTryFinally(TryFinally* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2119 | Comment cmnt(masm_, "[ TryFinally"); |
| 2120 | |
| 2121 | // State: Used to keep track of reason for entering the finally |
| 2122 | // block. Should probably be extended to hold information for |
| 2123 | // break/continue from within the try block. |
| 2124 | enum { FALLING, THROWING, JUMPING }; |
| 2125 | |
| 2126 | Label exit, unlink, try_block, finally_block; |
| 2127 | |
| 2128 | __ call(&try_block); |
| 2129 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2130 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2131 | // In case of thrown exceptions, this is where we continue. |
| 2132 | __ Set(ecx, Immediate(Smi::FromInt(THROWING))); |
| 2133 | __ jmp(&finally_block); |
| 2134 | |
| 2135 | |
| 2136 | // --- Try block --- |
| 2137 | __ bind(&try_block); |
| 2138 | |
| 2139 | __ PushTryHandler(IN_JAVASCRIPT, TRY_FINALLY_HANDLER); |
| 2140 | // TODO(1222589): remove the reliance of PushTryHandler on a cached TOS |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2141 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2142 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2143 | // Shadow the labels for all escapes from the try block, including |
| 2144 | // returns. During shadowing, the original label is hidden as the |
| 2145 | // LabelShadow and operations on the original actually affect the |
| 2146 | // shadowing label. |
| 2147 | // |
| 2148 | // We should probably try to unify the escaping labels and the return |
| 2149 | // label. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2150 | int nof_escapes = node->escaping_labels()->length(); |
| 2151 | List<LabelShadow*> shadows(1 + nof_escapes); |
| 2152 | shadows.Add(new LabelShadow(&function_return_)); |
| 2153 | for (int i = 0; i < nof_escapes; i++) { |
| 2154 | shadows.Add(new LabelShadow(node->escaping_labels()->at(i))); |
| 2155 | } |
| 2156 | |
| 2157 | // Generate code for the statements in the try block. |
| 2158 | bool was_inside_try = is_inside_try_; |
| 2159 | is_inside_try_ = true; |
| 2160 | VisitStatements(node->try_block()->statements()); |
| 2161 | is_inside_try_ = was_inside_try; |
| 2162 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2163 | // Stop the introduced shadowing and count the number of required unlinks. |
| 2164 | // After shadowing stops, the original labels are unshadowed and the |
| 2165 | // LabelShadows represent the formerly shadowing labels. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2166 | int nof_unlinks = 0; |
| 2167 | for (int i = 0; i <= nof_escapes; i++) { |
| 2168 | shadows[i]->StopShadowing(); |
| 2169 | if (shadows[i]->is_linked()) nof_unlinks++; |
| 2170 | } |
| 2171 | |
| 2172 | // Set the state on the stack to FALLING. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2173 | frame_->Push(Immediate(Factory::undefined_value())); // fake TOS |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2174 | __ Set(ecx, Immediate(Smi::FromInt(FALLING))); |
| 2175 | if (nof_unlinks > 0) __ jmp(&unlink); |
| 2176 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2177 | // Generate code to set the state for the (formerly) shadowing labels that |
| 2178 | // have been jumped to. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2179 | for (int i = 0; i <= nof_escapes; i++) { |
| 2180 | if (shadows[i]->is_linked()) { |
| 2181 | __ bind(shadows[i]); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2182 | if (shadows[i]->original_label() == &function_return_) { |
| 2183 | // If this label shadowed the function return, materialize the |
| 2184 | // return value on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2185 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2186 | } else { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2187 | // Fake TOS for labels that shadowed breaks and continues. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2188 | frame_->Push(Immediate(Factory::undefined_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2189 | } |
| 2190 | __ Set(ecx, Immediate(Smi::FromInt(JUMPING + i))); |
| 2191 | __ jmp(&unlink); |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | // Unlink from try chain; be careful not to destroy the TOS. |
| 2196 | __ bind(&unlink); |
| 2197 | // Reload sp from the top handler, because some statements that we |
| 2198 | // break from (eg, for...in) may have left stuff on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2199 | // Preserve the TOS in a register across stack manipulation. |
| 2200 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2201 | ExternalReference handler_address(Top::k_handler_address); |
| 2202 | __ mov(edx, Operand::StaticVariable(handler_address)); |
| 2203 | const int kNextOffset = StackHandlerConstants::kNextOffset + |
| 2204 | StackHandlerConstants::kAddressDisplacement; |
| 2205 | __ lea(esp, Operand(edx, kNextOffset)); |
| 2206 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2207 | frame_->Pop(Operand::StaticVariable(handler_address)); |
| 2208 | frame_->Drop(StackHandlerConstants::kSize / kPointerSize - 1); |
| 2209 | // Next_sp popped. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2210 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2211 | |
| 2212 | // --- Finally block --- |
| 2213 | __ bind(&finally_block); |
| 2214 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2215 | // Push the state on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2216 | frame_->Push(ecx); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2217 | |
| 2218 | // We keep two elements on the stack - the (possibly faked) result |
| 2219 | // and the state - while evaluating the finally block. Record it, so |
| 2220 | // that a break/continue crossing this statement can restore the |
| 2221 | // stack. |
| 2222 | const int kFinallyStackSize = 2 * kPointerSize; |
| 2223 | break_stack_height_ += kFinallyStackSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2224 | |
| 2225 | // Generate code for the statements in the finally block. |
| 2226 | VisitStatements(node->finally_block()->statements()); |
| 2227 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2228 | // Restore state and return value or faked TOS. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2229 | frame_->Pop(ecx); |
| 2230 | frame_->Pop(eax); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2231 | break_stack_height_ -= kFinallyStackSize; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2232 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2233 | // Generate code to jump to the right destination for all used (formerly) |
| 2234 | // shadowing labels. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2235 | for (int i = 0; i <= nof_escapes; i++) { |
| 2236 | if (shadows[i]->is_bound()) { |
| 2237 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(JUMPING + i))); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2238 | __ j(equal, shadows[i]->original_label()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2239 | } |
| 2240 | } |
| 2241 | |
| 2242 | // Check if we need to rethrow the exception. |
| 2243 | __ cmp(Operand(ecx), Immediate(Smi::FromInt(THROWING))); |
| 2244 | __ j(not_equal, &exit); |
| 2245 | |
| 2246 | // Rethrow exception. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2247 | frame_->Push(eax); // undo pop from above |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2248 | __ CallRuntime(Runtime::kReThrow, 1); |
| 2249 | |
| 2250 | // Done. |
| 2251 | __ bind(&exit); |
| 2252 | } |
| 2253 | |
| 2254 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2255 | void CodeGenerator::VisitDebuggerStatement(DebuggerStatement* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2256 | Comment cmnt(masm_, "[ DebuggerStatement"); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2257 | RecordStatementPosition(node); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2258 | __ CallRuntime(Runtime::kDebugBreak, 0); |
| 2259 | // Ignore the return value. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2260 | } |
| 2261 | |
| 2262 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2263 | void CodeGenerator::InstantiateBoilerplate(Handle<JSFunction> boilerplate) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2264 | ASSERT(boilerplate->IsBoilerplate()); |
| 2265 | |
| 2266 | // Push the boilerplate on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2267 | frame_->Push(Immediate(boilerplate)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2268 | |
| 2269 | // Create a new closure. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2270 | frame_->Push(esi); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2271 | __ CallRuntime(Runtime::kNewClosure, 2); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2272 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2273 | } |
| 2274 | |
| 2275 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2276 | void CodeGenerator::VisitFunctionLiteral(FunctionLiteral* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2277 | Comment cmnt(masm_, "[ FunctionLiteral"); |
| 2278 | |
| 2279 | // Build the function boilerplate and instantiate it. |
| 2280 | Handle<JSFunction> boilerplate = BuildBoilerplate(node); |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame] | 2281 | // Check for stack-overflow exception. |
| 2282 | if (HasStackOverflow()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2283 | InstantiateBoilerplate(boilerplate); |
| 2284 | } |
| 2285 | |
| 2286 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2287 | void CodeGenerator::VisitFunctionBoilerplateLiteral( |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2288 | FunctionBoilerplateLiteral* node) { |
| 2289 | Comment cmnt(masm_, "[ FunctionBoilerplateLiteral"); |
| 2290 | InstantiateBoilerplate(node->boilerplate()); |
| 2291 | } |
| 2292 | |
| 2293 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2294 | void CodeGenerator::VisitConditional(Conditional* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2295 | Comment cmnt(masm_, "[ Conditional"); |
| 2296 | Label then, else_, exit; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2297 | LoadCondition(node->condition(), NOT_INSIDE_TYPEOF, &then, &else_, true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2298 | Branch(false, &else_); |
| 2299 | __ bind(&then); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2300 | Load(node->then_expression(), typeof_state()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2301 | __ jmp(&exit); |
| 2302 | __ bind(&else_); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2303 | Load(node->else_expression(), typeof_state()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2304 | __ bind(&exit); |
| 2305 | } |
| 2306 | |
| 2307 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2308 | void CodeGenerator::LoadFromSlot(Slot* slot, TypeofState typeof_state) { |
| 2309 | if (slot->type() == Slot::LOOKUP) { |
| 2310 | ASSERT(slot->var()->mode() == Variable::DYNAMIC); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2311 | |
| 2312 | // For now, just do a runtime call. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2313 | frame_->Push(esi); |
| 2314 | frame_->Push(Immediate(slot->var()->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2315 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2316 | if (typeof_state == INSIDE_TYPEOF) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2317 | __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2318 | } else { |
| 2319 | __ CallRuntime(Runtime::kLoadContextSlot, 2); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2320 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2321 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2322 | |
| 2323 | } else { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2324 | // Note: We would like to keep the assert below, but it fires because of |
| 2325 | // some nasty code in LoadTypeofExpression() which should be removed... |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2326 | // ASSERT(slot->var()->mode() != Variable::DYNAMIC); |
| 2327 | if (slot->var()->mode() == Variable::CONST) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2328 | // Const slots may contain 'the hole' value (the constant hasn't been |
| 2329 | // initialized yet) which needs to be converted into the 'undefined' |
| 2330 | // value. |
| 2331 | Comment cmnt(masm_, "[ Load const"); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2332 | Label exit; |
| 2333 | __ mov(eax, SlotOperand(slot, ecx)); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2334 | __ cmp(eax, Factory::the_hole_value()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2335 | __ j(not_equal, &exit); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2336 | __ mov(eax, Factory::undefined_value()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2337 | __ bind(&exit); |
| 2338 | frame_->Push(eax); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2339 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2340 | frame_->Push(SlotOperand(slot, ecx)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2341 | } |
| 2342 | } |
| 2343 | } |
| 2344 | |
| 2345 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2346 | void CodeGenerator::VisitSlot(Slot* node) { |
| 2347 | Comment cmnt(masm_, "[ Slot"); |
| 2348 | LoadFromSlot(node, typeof_state()); |
| 2349 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2350 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2351 | |
| 2352 | void CodeGenerator::VisitVariableProxy(VariableProxy* node) { |
| 2353 | Comment cmnt(masm_, "[ VariableProxy"); |
| 2354 | Variable* var = node->var(); |
| 2355 | Expression* expr = var->rewrite(); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 2356 | if (expr != NULL) { |
| 2357 | Visit(expr); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2358 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2359 | ASSERT(var->is_global()); |
| 2360 | Reference ref(this, node); |
| 2361 | ref.GetValue(typeof_state()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2366 | void CodeGenerator::VisitLiteral(Literal* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2367 | Comment cmnt(masm_, "[ Literal"); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2368 | if (node->handle()->IsSmi() && !IsInlineSmi(node)) { |
| 2369 | // To prevent long attacker-controlled byte sequences in code, larger |
| 2370 | // Smis are loaded in two steps. |
| 2371 | int bits = reinterpret_cast<int>(*node->handle()); |
| 2372 | __ mov(eax, bits & 0x0000FFFF); |
| 2373 | __ xor_(eax, bits & 0xFFFF0000); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2374 | frame_->Push(eax); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2375 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2376 | frame_->Push(Immediate(node->handle())); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2377 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2378 | } |
| 2379 | |
| 2380 | |
| 2381 | class RegExpDeferred: public DeferredCode { |
| 2382 | public: |
| 2383 | RegExpDeferred(CodeGenerator* generator, RegExpLiteral* node) |
| 2384 | : DeferredCode(generator), node_(node) { |
| 2385 | set_comment("[ RegExpDeferred"); |
| 2386 | } |
| 2387 | virtual void Generate(); |
| 2388 | private: |
| 2389 | RegExpLiteral* node_; |
| 2390 | }; |
| 2391 | |
| 2392 | |
| 2393 | void RegExpDeferred::Generate() { |
| 2394 | // If the entry is undefined we call the runtime system to computed |
| 2395 | // the literal. |
| 2396 | |
| 2397 | // Literal array (0). |
| 2398 | __ push(ecx); |
| 2399 | // Literal index (1). |
| 2400 | __ push(Immediate(Smi::FromInt(node_->literal_index()))); |
| 2401 | // RegExp pattern (2). |
| 2402 | __ push(Immediate(node_->pattern())); |
| 2403 | // RegExp flags (3). |
| 2404 | __ push(Immediate(node_->flags())); |
| 2405 | __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4); |
| 2406 | __ mov(ebx, Operand(eax)); // "caller" expects result in ebx |
| 2407 | } |
| 2408 | |
| 2409 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2410 | void CodeGenerator::VisitRegExpLiteral(RegExpLiteral* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2411 | Comment cmnt(masm_, "[ RegExp Literal"); |
| 2412 | RegExpDeferred* deferred = new RegExpDeferred(this, node); |
| 2413 | |
| 2414 | // Retrieve the literal array and check the allocated entry. |
| 2415 | |
| 2416 | // Load the function of this activation. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2417 | __ mov(ecx, frame_->Function()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2418 | |
| 2419 | // Load the literals array of the function. |
| 2420 | __ mov(ecx, FieldOperand(ecx, JSFunction::kLiteralsOffset)); |
| 2421 | |
| 2422 | // Load the literal at the ast saved index. |
| 2423 | int literal_offset = |
| 2424 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
| 2425 | __ mov(ebx, FieldOperand(ecx, literal_offset)); |
| 2426 | |
| 2427 | // Check whether we need to materialize the RegExp object. |
| 2428 | // If so, jump to the deferred code. |
| 2429 | __ cmp(ebx, Factory::undefined_value()); |
| 2430 | __ j(equal, deferred->enter(), not_taken); |
| 2431 | __ bind(deferred->exit()); |
| 2432 | |
| 2433 | // Push the literal. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2434 | frame_->Push(ebx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2435 | } |
| 2436 | |
| 2437 | |
| 2438 | // This deferred code stub will be used for creating the boilerplate |
| 2439 | // by calling Runtime_CreateObjectLiteral. |
| 2440 | // Each created boilerplate is stored in the JSFunction and they are |
| 2441 | // therefore context dependent. |
| 2442 | class ObjectLiteralDeferred: public DeferredCode { |
| 2443 | public: |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2444 | ObjectLiteralDeferred(CodeGenerator* generator, |
| 2445 | ObjectLiteral* node) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2446 | : DeferredCode(generator), node_(node) { |
| 2447 | set_comment("[ ObjectLiteralDeferred"); |
| 2448 | } |
| 2449 | virtual void Generate(); |
| 2450 | private: |
| 2451 | ObjectLiteral* node_; |
| 2452 | }; |
| 2453 | |
| 2454 | |
| 2455 | void ObjectLiteralDeferred::Generate() { |
v8.team.kasperl | 727e995 | 2008-09-02 14:56:44 +0000 | [diff] [blame] | 2456 | // If the entry is undefined we call the runtime system to compute |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2457 | // the literal. |
| 2458 | |
| 2459 | // Literal array (0). |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2460 | __ push(ecx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2461 | // Literal index (1). |
| 2462 | __ push(Immediate(Smi::FromInt(node_->literal_index()))); |
| 2463 | // Constant properties (2). |
| 2464 | __ push(Immediate(node_->constant_properties())); |
| 2465 | __ CallRuntime(Runtime::kCreateObjectLiteralBoilerplate, 3); |
| 2466 | __ mov(ebx, Operand(eax)); |
| 2467 | } |
| 2468 | |
| 2469 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2470 | void CodeGenerator::VisitObjectLiteral(ObjectLiteral* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2471 | Comment cmnt(masm_, "[ ObjectLiteral"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2472 | ObjectLiteralDeferred* deferred = new ObjectLiteralDeferred(this, node); |
| 2473 | |
| 2474 | // Retrieve the literal array and check the allocated entry. |
| 2475 | |
| 2476 | // Load the function of this activation. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2477 | __ mov(ecx, frame_->Function()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2478 | |
| 2479 | // Load the literals array of the function. |
| 2480 | __ mov(ecx, FieldOperand(ecx, JSFunction::kLiteralsOffset)); |
| 2481 | |
| 2482 | // Load the literal at the ast saved index. |
| 2483 | int literal_offset = |
| 2484 | FixedArray::kHeaderSize + node->literal_index() * kPointerSize; |
| 2485 | __ mov(ebx, FieldOperand(ecx, literal_offset)); |
| 2486 | |
| 2487 | // Check whether we need to materialize the object literal boilerplate. |
| 2488 | // If so, jump to the deferred code. |
| 2489 | __ cmp(ebx, Factory::undefined_value()); |
| 2490 | __ j(equal, deferred->enter(), not_taken); |
| 2491 | __ bind(deferred->exit()); |
| 2492 | |
| 2493 | // Push the literal. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2494 | frame_->Push(ebx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2495 | // Clone the boilerplate object. |
| 2496 | __ CallRuntime(Runtime::kCloneObjectLiteralBoilerplate, 1); |
| 2497 | // Push the new cloned literal object as the result. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2498 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2499 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2500 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2501 | for (int i = 0; i < node->properties()->length(); i++) { |
| 2502 | ObjectLiteral::Property* property = node->properties()->at(i); |
| 2503 | switch (property->kind()) { |
| 2504 | case ObjectLiteral::Property::CONSTANT: break; |
| 2505 | case ObjectLiteral::Property::COMPUTED: { |
| 2506 | Handle<Object> key(property->key()->handle()); |
| 2507 | Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| 2508 | if (key->IsSymbol()) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2509 | __ mov(eax, frame_->Top()); |
| 2510 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2511 | Load(property->value()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2512 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2513 | __ Set(ecx, Immediate(key)); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2514 | __ call(ic, RelocInfo::CODE_TARGET); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2515 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2516 | // Ignore result. |
| 2517 | break; |
| 2518 | } |
| 2519 | // Fall through |
| 2520 | } |
| 2521 | case ObjectLiteral::Property::PROTOTYPE: { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2522 | __ mov(eax, frame_->Top()); |
| 2523 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2524 | Load(property->key()); |
| 2525 | Load(property->value()); |
| 2526 | __ CallRuntime(Runtime::kSetProperty, 3); |
| 2527 | // Ignore result. |
| 2528 | break; |
| 2529 | } |
| 2530 | case ObjectLiteral::Property::SETTER: { |
| 2531 | // Duplicate the resulting object on the stack. The runtime |
| 2532 | // function will pop the three arguments passed in. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2533 | __ mov(eax, frame_->Top()); |
| 2534 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2535 | Load(property->key()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2536 | frame_->Push(Immediate(Smi::FromInt(1))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2537 | Load(property->value()); |
| 2538 | __ CallRuntime(Runtime::kDefineAccessor, 4); |
| 2539 | // Ignore result. |
| 2540 | break; |
| 2541 | } |
| 2542 | case ObjectLiteral::Property::GETTER: { |
| 2543 | // Duplicate the resulting object on the stack. The runtime |
| 2544 | // function will pop the three arguments passed in. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2545 | __ mov(eax, frame_->Top()); |
| 2546 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2547 | Load(property->key()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2548 | frame_->Push(Immediate(Smi::FromInt(0))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2549 | Load(property->value()); |
| 2550 | __ CallRuntime(Runtime::kDefineAccessor, 4); |
| 2551 | // Ignore result. |
| 2552 | break; |
| 2553 | } |
| 2554 | default: UNREACHABLE(); |
| 2555 | } |
| 2556 | } |
| 2557 | } |
| 2558 | |
| 2559 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2560 | void CodeGenerator::VisitArrayLiteral(ArrayLiteral* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2561 | Comment cmnt(masm_, "[ ArrayLiteral"); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2562 | |
| 2563 | // Call runtime to create the array literal. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2564 | frame_->Push(Immediate(node->literals())); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2565 | // Load the function of this frame. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2566 | __ mov(ecx, frame_->Function()); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2567 | // Load the literals array of the function. |
| 2568 | __ mov(ecx, FieldOperand(ecx, JSFunction::kLiteralsOffset)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2569 | frame_->Push(ecx); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2570 | __ CallRuntime(Runtime::kCreateArrayLiteral, 2); |
| 2571 | |
| 2572 | // Push the resulting array literal on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2573 | frame_->Push(eax); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2574 | |
| 2575 | // Generate code to set the elements in the array that are not |
| 2576 | // literals. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2577 | for (int i = 0; i < node->values()->length(); i++) { |
| 2578 | Expression* value = node->values()->at(i); |
| 2579 | |
| 2580 | // If value is literal the property value is already |
| 2581 | // set in the boilerplate object. |
| 2582 | if (value->AsLiteral() == NULL) { |
| 2583 | // The property must be set by generated code. |
| 2584 | Load(value); |
| 2585 | |
| 2586 | // Get the value off the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2587 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2588 | // Fetch the object literal while leaving on the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2589 | __ mov(ecx, frame_->Top()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2590 | // Get the elements array. |
| 2591 | __ mov(ecx, FieldOperand(ecx, JSObject::kElementsOffset)); |
| 2592 | |
| 2593 | // Write to the indexed properties array. |
| 2594 | int offset = i * kPointerSize + Array::kHeaderSize; |
| 2595 | __ mov(FieldOperand(ecx, offset), eax); |
| 2596 | |
| 2597 | // Update the write barrier for the array address. |
| 2598 | __ RecordWrite(ecx, offset, eax, ebx); |
| 2599 | } |
| 2600 | } |
| 2601 | } |
| 2602 | |
| 2603 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2604 | bool CodeGenerator::IsInlineSmi(Literal* literal) { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2605 | if (literal == NULL || !literal->handle()->IsSmi()) return false; |
| 2606 | int int_value = Smi::cast(*literal->handle())->value(); |
| 2607 | return is_intn(int_value, kMaxSmiInlinedBits); |
| 2608 | } |
| 2609 | |
| 2610 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2611 | void CodeGenerator::VisitAssignment(Assignment* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2612 | Comment cmnt(masm_, "[ Assignment"); |
| 2613 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2614 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2615 | Reference target(this, node->target()); |
| 2616 | if (target.is_illegal()) return; |
| 2617 | |
| 2618 | if (node->op() == Token::ASSIGN || |
| 2619 | node->op() == Token::INIT_VAR || |
| 2620 | node->op() == Token::INIT_CONST) { |
| 2621 | Load(node->value()); |
| 2622 | |
| 2623 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2624 | target.GetValue(NOT_INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2625 | Literal* literal = node->value()->AsLiteral(); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 2626 | if (IsInlineSmi(literal)) { |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 2627 | SmiOperation(node->binary_op(), node->type(), literal->handle(), false, |
| 2628 | NO_OVERWRITE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2629 | } else { |
| 2630 | Load(node->value()); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 2631 | GenericBinaryOperation(node->binary_op(), node->type()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2632 | } |
| 2633 | } |
| 2634 | |
| 2635 | Variable* var = node->target()->AsVariableProxy()->AsVariable(); |
| 2636 | if (var != NULL && |
| 2637 | var->mode() == Variable::CONST && |
| 2638 | node->op() != Token::INIT_VAR && node->op() != Token::INIT_CONST) { |
| 2639 | // Assignment ignored - leave the value on the stack. |
| 2640 | } else { |
| 2641 | __ RecordPosition(node->position()); |
| 2642 | if (node->op() == Token::INIT_CONST) { |
| 2643 | // Dynamic constant initializations must use the function context |
| 2644 | // and initialize the actual constant declared. Dynamic variable |
| 2645 | // initializations are simply assignments and use SetValue. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2646 | target.SetValue(CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2647 | } else { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2648 | target.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2649 | } |
| 2650 | } |
| 2651 | } |
| 2652 | |
| 2653 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2654 | void CodeGenerator::VisitThrow(Throw* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2655 | Comment cmnt(masm_, "[ Throw"); |
| 2656 | |
| 2657 | Load(node->exception()); |
| 2658 | __ RecordPosition(node->position()); |
| 2659 | __ CallRuntime(Runtime::kThrow, 1); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2660 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2661 | } |
| 2662 | |
| 2663 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2664 | void CodeGenerator::VisitProperty(Property* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2665 | Comment cmnt(masm_, "[ Property"); |
| 2666 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2667 | Reference property(this, node); |
| 2668 | property.GetValue(typeof_state()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2669 | } |
| 2670 | |
| 2671 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2672 | void CodeGenerator::VisitCall(Call* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2673 | Comment cmnt(masm_, "[ Call"); |
| 2674 | |
| 2675 | ZoneList<Expression*>* args = node->arguments(); |
| 2676 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2677 | RecordStatementPosition(node); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2678 | |
| 2679 | // Check if the function is a variable or a property. |
| 2680 | Expression* function = node->expression(); |
| 2681 | Variable* var = function->AsVariableProxy()->AsVariable(); |
| 2682 | Property* property = function->AsProperty(); |
| 2683 | |
| 2684 | // ------------------------------------------------------------------------ |
| 2685 | // Fast-case: Use inline caching. |
| 2686 | // --- |
| 2687 | // According to ECMA-262, section 11.2.3, page 44, the function to call |
| 2688 | // must be resolved after the arguments have been evaluated. The IC code |
| 2689 | // automatically handles this by loading the arguments before the function |
| 2690 | // is resolved in cache misses (this also holds for megamorphic calls). |
| 2691 | // ------------------------------------------------------------------------ |
| 2692 | |
| 2693 | if (var != NULL && !var->is_this() && var->is_global()) { |
| 2694 | // ---------------------------------- |
| 2695 | // JavaScript example: 'foo(1, 2, 3)' // foo is global |
| 2696 | // ---------------------------------- |
| 2697 | |
| 2698 | // Push the name of the function and the receiver onto the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2699 | frame_->Push(Immediate(var->name())); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2700 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2701 | // Pass the global object as the receiver and let the IC stub |
| 2702 | // patch the stack to use the global proxy as 'this' in the |
| 2703 | // invoked function. |
| 2704 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2705 | // Load the arguments. |
| 2706 | for (int i = 0; i < args->length(); i++) { |
| 2707 | Load(args->at(i)); |
| 2708 | } |
| 2709 | |
| 2710 | // Setup the receiver register and call the IC initialization code. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 2711 | Handle<Code> stub = (loop_nesting() > 0) |
| 2712 | ? ComputeCallInitializeInLoop(args->length()) |
| 2713 | : ComputeCallInitialize(args->length()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2714 | __ RecordPosition(node->position()); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2715 | __ call(stub, RelocInfo::CODE_TARGET_CONTEXT); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2716 | __ mov(esi, frame_->Context()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2717 | |
| 2718 | // Overwrite the function on the stack with the result. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2719 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2720 | |
| 2721 | } else if (var != NULL && var->slot() != NULL && |
| 2722 | var->slot()->type() == Slot::LOOKUP) { |
| 2723 | // ---------------------------------- |
| 2724 | // JavaScript example: 'with (obj) foo(1, 2, 3)' // foo is in obj |
| 2725 | // ---------------------------------- |
| 2726 | |
| 2727 | // Load the function |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2728 | frame_->Push(esi); |
| 2729 | frame_->Push(Immediate(var->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2730 | __ CallRuntime(Runtime::kLoadContextSlot, 2); |
| 2731 | // eax: slot value; edx: receiver |
| 2732 | |
| 2733 | // Load the receiver. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2734 | frame_->Push(eax); |
| 2735 | frame_->Push(edx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2736 | |
| 2737 | // Call the function. |
| 2738 | CallWithArguments(args, node->position()); |
| 2739 | |
| 2740 | } else if (property != NULL) { |
| 2741 | // Check if the key is a literal string. |
| 2742 | Literal* literal = property->key()->AsLiteral(); |
| 2743 | |
| 2744 | if (literal != NULL && literal->handle()->IsSymbol()) { |
| 2745 | // ------------------------------------------------------------------ |
| 2746 | // JavaScript example: 'object.foo(1, 2, 3)' or 'map["key"](1, 2, 3)' |
| 2747 | // ------------------------------------------------------------------ |
| 2748 | |
| 2749 | // Push the name of the function and the receiver onto the stack. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2750 | frame_->Push(Immediate(literal->handle())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2751 | Load(property->obj()); |
| 2752 | |
| 2753 | // Load the arguments. |
| 2754 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
| 2755 | |
| 2756 | // Call the IC initialization code. |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 2757 | Handle<Code> stub = (loop_nesting() > 0) |
| 2758 | ? ComputeCallInitializeInLoop(args->length()) |
| 2759 | : ComputeCallInitialize(args->length()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2760 | __ RecordPosition(node->position()); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2761 | __ call(stub, RelocInfo::CODE_TARGET); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2762 | __ mov(esi, frame_->Context()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2763 | |
| 2764 | // Overwrite the function on the stack with the result. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2765 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2766 | |
| 2767 | } else { |
| 2768 | // ------------------------------------------- |
| 2769 | // JavaScript example: 'array[index](1, 2, 3)' |
| 2770 | // ------------------------------------------- |
| 2771 | |
| 2772 | // Load the function to call from the property through a reference. |
| 2773 | Reference ref(this, property); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2774 | ref.GetValue(NOT_INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2775 | |
| 2776 | // Pass receiver to called function. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2777 | // The reference's size is non-negative. |
| 2778 | frame_->Push(frame_->Element(ref.size())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2779 | |
| 2780 | // Call the function. |
| 2781 | CallWithArguments(args, node->position()); |
| 2782 | } |
| 2783 | |
| 2784 | } else { |
| 2785 | // ---------------------------------- |
| 2786 | // JavaScript example: 'foo(1, 2, 3)' // foo is not global |
| 2787 | // ---------------------------------- |
| 2788 | |
| 2789 | // Load the function. |
| 2790 | Load(function); |
| 2791 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2792 | // Pass the global proxy as the receiver. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 2793 | LoadGlobalReceiver(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2794 | |
| 2795 | // Call the function. |
| 2796 | CallWithArguments(args, node->position()); |
| 2797 | } |
| 2798 | } |
| 2799 | |
| 2800 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2801 | void CodeGenerator::VisitCallNew(CallNew* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2802 | Comment cmnt(masm_, "[ CallNew"); |
| 2803 | |
| 2804 | // According to ECMA-262, section 11.2.2, page 44, the function |
| 2805 | // expression in new calls must be evaluated before the |
| 2806 | // arguments. This is different from ordinary calls, where the |
| 2807 | // actual function to call is resolved after the arguments have been |
| 2808 | // evaluated. |
| 2809 | |
| 2810 | // Compute function to call and use the global object as the |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2811 | // receiver. There is no need to use the global proxy here because |
| 2812 | // it will always be replaced with a newly allocated object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2813 | Load(node->expression()); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2814 | LoadGlobal(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2815 | |
| 2816 | // Push the arguments ("left-to-right") on the stack. |
| 2817 | ZoneList<Expression*>* args = node->arguments(); |
| 2818 | for (int i = 0; i < args->length(); i++) Load(args->at(i)); |
| 2819 | |
| 2820 | // Constructors are called with the number of arguments in register |
| 2821 | // eax for now. Another option would be to have separate construct |
| 2822 | // call trampolines per different arguments counts encountered. |
| 2823 | __ Set(eax, Immediate(args->length())); |
| 2824 | |
| 2825 | // Load the function into temporary function slot as per calling |
| 2826 | // convention. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2827 | __ mov(edi, frame_->Element(args->length() + 1)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2828 | |
| 2829 | // Call the construct call builtin that handles allocation and |
| 2830 | // constructor invocation. |
| 2831 | __ RecordPosition(node->position()); |
| 2832 | __ call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)), |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 2833 | RelocInfo::CONSTRUCT_CALL); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2834 | // Discard the function and "push" the newly created object. |
| 2835 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2836 | } |
| 2837 | |
| 2838 | |
ager@chromium.org | a74f0da | 2008-12-03 16:05:52 +0000 | [diff] [blame^] | 2839 | void CodeGenerator::VisitCallEval(CallEval* node) { |
| 2840 | Comment cmnt(masm_, "[ CallEval"); |
| 2841 | |
| 2842 | // In a call to eval, we first call %ResolvePossiblyDirectEval to resolve |
| 2843 | // the function we need to call and the receiver of the call. |
| 2844 | // Then we call the resolved function using the given arguments. |
| 2845 | |
| 2846 | ZoneList<Expression*>* args = node->arguments(); |
| 2847 | Expression* function = node->expression(); |
| 2848 | |
| 2849 | RecordStatementPosition(node); |
| 2850 | |
| 2851 | // Prepare stack for call to resolved function. |
| 2852 | Load(function); |
| 2853 | __ push(Immediate(Factory::undefined_value())); // Slot for receiver |
| 2854 | for (int i = 0; i < args->length(); i++) { |
| 2855 | Load(args->at(i)); |
| 2856 | } |
| 2857 | |
| 2858 | // Prepare stack for call to ResolvePossiblyDirectEval. |
| 2859 | __ push(Operand(esp, args->length() * kPointerSize + kPointerSize)); |
| 2860 | if (args->length() > 0) { |
| 2861 | __ push(Operand(esp, args->length() * kPointerSize)); |
| 2862 | } else { |
| 2863 | __ push(Immediate(Factory::undefined_value())); |
| 2864 | } |
| 2865 | |
| 2866 | // Resolve the call. |
| 2867 | __ CallRuntime(Runtime::kResolvePossiblyDirectEval, 2); |
| 2868 | |
| 2869 | // Touch up stack with the right values for the function and the receiver. |
| 2870 | __ mov(edx, FieldOperand(eax, FixedArray::kHeaderSize)); |
| 2871 | __ mov(Operand(esp, (args->length() + 1) * kPointerSize), edx); |
| 2872 | __ mov(edx, FieldOperand(eax, FixedArray::kHeaderSize + kPointerSize)); |
| 2873 | __ mov(Operand(esp, args->length() * kPointerSize), edx); |
| 2874 | |
| 2875 | // Call the function. |
| 2876 | __ RecordPosition(node->position()); |
| 2877 | |
| 2878 | CallFunctionStub call_function(args->length()); |
| 2879 | __ CallStub(&call_function); |
| 2880 | |
| 2881 | // Restore context and pop function from the stack. |
| 2882 | __ mov(esi, frame_->Context()); |
| 2883 | __ mov(frame_->Top(), eax); |
| 2884 | } |
| 2885 | |
| 2886 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2887 | void CodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2888 | ASSERT(args->length() == 1); |
| 2889 | Load(args->at(0)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2890 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2891 | __ test(eax, Immediate(kSmiTagMask)); |
| 2892 | cc_reg_ = zero; |
| 2893 | } |
| 2894 | |
| 2895 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2896 | void CodeGenerator::GenerateIsNonNegativeSmi(ZoneList<Expression*>* args) { |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 2897 | ASSERT(args->length() == 1); |
| 2898 | Load(args->at(0)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2899 | frame_->Pop(eax); |
ager@chromium.org | c27e4e7 | 2008-09-04 13:52:27 +0000 | [diff] [blame] | 2900 | __ test(eax, Immediate(kSmiTagMask | 0x80000000)); |
| 2901 | cc_reg_ = zero; |
| 2902 | } |
| 2903 | |
| 2904 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2905 | // This generates code that performs a charCodeAt() call or returns |
| 2906 | // undefined in order to trigger the slow case, Runtime_StringCharCodeAt. |
| 2907 | // It can handle flat and sliced strings, 8 and 16 bit characters and |
| 2908 | // cons strings where the answer is found in the left hand branch of the |
| 2909 | // cons. The slow case will flatten the string, which will ensure that |
| 2910 | // the answer is in the left hand side the next time around. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2911 | void CodeGenerator::GenerateFastCharCodeAt(ZoneList<Expression*>* args) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2912 | ASSERT(args->length() == 2); |
| 2913 | |
| 2914 | Label slow_case; |
| 2915 | Label end; |
| 2916 | Label not_a_flat_string; |
| 2917 | Label not_a_cons_string_either; |
| 2918 | Label try_again_with_new_string; |
| 2919 | Label ascii_string; |
| 2920 | Label got_char_code; |
| 2921 | |
| 2922 | // Load the string into eax. |
| 2923 | Load(args->at(0)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2924 | frame_->Pop(eax); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2925 | // If the receiver is a smi return undefined. |
| 2926 | ASSERT(kSmiTag == 0); |
| 2927 | __ test(eax, Immediate(kSmiTagMask)); |
| 2928 | __ j(zero, &slow_case, not_taken); |
| 2929 | |
| 2930 | // Load the index into ebx. |
| 2931 | Load(args->at(1)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2932 | frame_->Pop(ebx); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2933 | |
| 2934 | // Check for negative or non-smi index. |
| 2935 | ASSERT(kSmiTag == 0); |
| 2936 | __ test(ebx, Immediate(kSmiTagMask | 0x80000000)); |
| 2937 | __ j(not_zero, &slow_case, not_taken); |
| 2938 | // Get rid of the smi tag on the index. |
| 2939 | __ sar(ebx, kSmiTagSize); |
| 2940 | |
| 2941 | __ bind(&try_again_with_new_string); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2942 | // Get the type of the heap object into edi. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2943 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2944 | __ movzx_b(edi, FieldOperand(edx, Map::kInstanceTypeOffset)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2945 | // We don't handle non-strings. |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2946 | __ test(edi, Immediate(kIsNotStringMask)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2947 | __ j(not_zero, &slow_case, not_taken); |
| 2948 | |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2949 | // Here we make assumptions about the tag values and the shifts needed. |
| 2950 | // See the comment in objects.h. |
| 2951 | ASSERT(kLongStringTag == 0); |
| 2952 | ASSERT(kMediumStringTag + String::kLongLengthShift == |
| 2953 | String::kMediumLengthShift); |
| 2954 | ASSERT(kShortStringTag + String::kLongLengthShift == |
| 2955 | String::kShortLengthShift); |
| 2956 | __ mov(ecx, Operand(edi)); |
| 2957 | __ and_(ecx, kStringSizeMask); |
| 2958 | __ add(Operand(ecx), Immediate(String::kLongLengthShift)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2959 | // Get the length field. |
| 2960 | __ mov(edx, FieldOperand(eax, String::kLengthOffset)); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2961 | __ shr(edx); // ecx is implicit operand. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2962 | // edx is now the length of the string. |
| 2963 | |
| 2964 | // Check for index out of range. |
| 2965 | __ cmp(ebx, Operand(edx)); |
| 2966 | __ j(greater_equal, &slow_case, not_taken); |
| 2967 | |
| 2968 | // We need special handling for non-flat strings. |
| 2969 | ASSERT(kSeqStringTag == 0); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2970 | __ test(edi, Immediate(kStringRepresentationMask)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2971 | __ j(not_zero, ¬_a_flat_string, not_taken); |
| 2972 | |
| 2973 | // Check for 1-byte or 2-byte string. |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2974 | __ test(edi, Immediate(kStringEncodingMask)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2975 | __ j(not_zero, &ascii_string, taken); |
| 2976 | |
| 2977 | // 2-byte string. |
| 2978 | // Load the 2-byte character code. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2979 | __ movzx_w(eax, |
| 2980 | FieldOperand(eax, ebx, times_2, SeqTwoByteString::kHeaderSize)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2981 | __ jmp(&got_char_code); |
| 2982 | |
| 2983 | // ASCII string. |
| 2984 | __ bind(&ascii_string); |
| 2985 | // Load the byte. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2986 | __ movzx_b(eax, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize)); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2987 | |
| 2988 | __ bind(&got_char_code); |
| 2989 | ASSERT(kSmiTag == 0); |
| 2990 | __ shl(eax, kSmiTagSize); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 2991 | frame_->Push(eax); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2992 | __ jmp(&end); |
| 2993 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2994 | // Handle non-flat strings. |
| 2995 | __ bind(¬_a_flat_string); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 2996 | __ and_(edi, kStringRepresentationMask); |
| 2997 | __ cmp(edi, kConsStringTag); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 2998 | __ j(not_equal, ¬_a_cons_string_either, not_taken); |
| 2999 | |
| 3000 | // ConsString. |
| 3001 | // Get the first of the two strings. |
| 3002 | __ mov(eax, FieldOperand(eax, ConsString::kFirstOffset)); |
| 3003 | __ jmp(&try_again_with_new_string); |
| 3004 | |
| 3005 | __ bind(¬_a_cons_string_either); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 3006 | __ cmp(edi, kSlicedStringTag); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3007 | __ j(not_equal, &slow_case, not_taken); |
| 3008 | |
| 3009 | // SlicedString. |
| 3010 | // Add the offset to the index. |
| 3011 | __ add(ebx, FieldOperand(eax, SlicedString::kStartOffset)); |
| 3012 | __ j(overflow, &slow_case); |
| 3013 | // Get the underlying string. |
| 3014 | __ mov(eax, FieldOperand(eax, SlicedString::kBufferOffset)); |
| 3015 | __ jmp(&try_again_with_new_string); |
| 3016 | |
| 3017 | __ bind(&slow_case); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3018 | frame_->Push(Immediate(Factory::undefined_value())); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3019 | |
| 3020 | __ bind(&end); |
| 3021 | } |
| 3022 | |
| 3023 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3024 | void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3025 | ASSERT(args->length() == 1); |
| 3026 | Load(args->at(0)); |
| 3027 | Label answer; |
| 3028 | // We need the CC bits to come out as not_equal in the case where the |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3029 | // object is a smi. This can't be done with the usual test opcode so |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3030 | // we copy the object to ecx and do some destructive ops on it that |
| 3031 | // result in the right CC bits. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3032 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3033 | __ mov(ecx, Operand(eax)); |
| 3034 | __ and_(ecx, kSmiTagMask); |
| 3035 | __ xor_(ecx, kSmiTagMask); |
| 3036 | __ j(not_equal, &answer, not_taken); |
| 3037 | // It is a heap object - get map. |
| 3038 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3039 | __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset)); |
| 3040 | // Check if the object is a JS array or not. |
| 3041 | __ cmp(eax, JS_ARRAY_TYPE); |
| 3042 | __ bind(&answer); |
| 3043 | cc_reg_ = equal; |
| 3044 | } |
| 3045 | |
| 3046 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3047 | void CodeGenerator::GenerateArgumentsLength(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3048 | ASSERT(args->length() == 0); |
| 3049 | |
| 3050 | // Seed the result with the formal parameters count, which will be |
| 3051 | // used in case no arguments adaptor frame is found below the |
| 3052 | // current frame. |
| 3053 | __ Set(eax, Immediate(Smi::FromInt(scope_->num_parameters()))); |
| 3054 | |
| 3055 | // Call the shared stub to get to the arguments.length. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3056 | ArgumentsAccessStub stub(ArgumentsAccessStub::READ_LENGTH); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3057 | __ CallStub(&stub); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3058 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3059 | } |
| 3060 | |
| 3061 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3062 | void CodeGenerator::GenerateValueOf(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3063 | ASSERT(args->length() == 1); |
| 3064 | Label leave; |
| 3065 | Load(args->at(0)); // Load the object. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3066 | __ mov(eax, frame_->Top()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3067 | // if (object->IsSmi()) return object. |
| 3068 | __ test(eax, Immediate(kSmiTagMask)); |
| 3069 | __ j(zero, &leave, taken); |
| 3070 | // It is a heap object - get map. |
| 3071 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3072 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 3073 | // if (!object->IsJSValue()) return object. |
| 3074 | __ cmp(ecx, JS_VALUE_TYPE); |
| 3075 | __ j(not_equal, &leave, not_taken); |
| 3076 | __ mov(eax, FieldOperand(eax, JSValue::kValueOffset)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3077 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3078 | __ bind(&leave); |
| 3079 | } |
| 3080 | |
| 3081 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3082 | void CodeGenerator::GenerateSetValueOf(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3083 | ASSERT(args->length() == 2); |
| 3084 | Label leave; |
| 3085 | Load(args->at(0)); // Load the object. |
| 3086 | Load(args->at(1)); // Load the value. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3087 | __ mov(eax, frame_->Element(1)); |
| 3088 | __ mov(ecx, frame_->Top()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3089 | // if (object->IsSmi()) return object. |
| 3090 | __ test(eax, Immediate(kSmiTagMask)); |
| 3091 | __ j(zero, &leave, taken); |
| 3092 | // It is a heap object - get map. |
| 3093 | __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3094 | __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset)); |
| 3095 | // if (!object->IsJSValue()) return object. |
| 3096 | __ cmp(ebx, JS_VALUE_TYPE); |
| 3097 | __ j(not_equal, &leave, not_taken); |
| 3098 | // Store the value. |
| 3099 | __ mov(FieldOperand(eax, JSValue::kValueOffset), ecx); |
| 3100 | // Update the write barrier. |
| 3101 | __ RecordWrite(eax, JSValue::kValueOffset, ecx, ebx); |
| 3102 | // Leave. |
| 3103 | __ bind(&leave); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3104 | __ mov(ecx, frame_->Top()); |
| 3105 | frame_->Pop(); |
| 3106 | __ mov(frame_->Top(), ecx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3107 | } |
| 3108 | |
| 3109 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3110 | void CodeGenerator::GenerateArgumentsAccess(ZoneList<Expression*>* args) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3111 | ASSERT(args->length() == 1); |
| 3112 | |
| 3113 | // Load the key onto the stack and set register eax to the formal |
| 3114 | // parameters count for the currently executing function. |
| 3115 | Load(args->at(0)); |
| 3116 | __ Set(eax, Immediate(Smi::FromInt(scope_->num_parameters()))); |
| 3117 | |
| 3118 | // Call the shared stub to get to arguments[key]. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3119 | ArgumentsAccessStub stub(ArgumentsAccessStub::READ_ELEMENT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3120 | __ CallStub(&stub); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3121 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3122 | } |
| 3123 | |
| 3124 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3125 | void CodeGenerator::GenerateObjectEquals(ZoneList<Expression*>* args) { |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 3126 | ASSERT(args->length() == 2); |
| 3127 | |
| 3128 | // Load the two objects into registers and perform the comparison. |
| 3129 | Load(args->at(0)); |
| 3130 | Load(args->at(1)); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3131 | frame_->Pop(eax); |
| 3132 | frame_->Pop(ecx); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 3133 | __ cmp(eax, Operand(ecx)); |
| 3134 | cc_reg_ = equal; |
| 3135 | } |
| 3136 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3137 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3138 | void CodeGenerator::VisitCallRuntime(CallRuntime* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3139 | if (CheckForInlineRuntimeCall(node)) return; |
| 3140 | |
| 3141 | ZoneList<Expression*>* args = node->arguments(); |
| 3142 | Comment cmnt(masm_, "[ CallRuntime"); |
| 3143 | Runtime::Function* function = node->function(); |
| 3144 | |
| 3145 | if (function == NULL) { |
| 3146 | // Prepare stack for calling JS runtime function. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3147 | frame_->Push(Immediate(node->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3148 | // Push the builtins object found in the current global object. |
| 3149 | __ mov(edx, GlobalObject()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3150 | frame_->Push(FieldOperand(edx, GlobalObject::kBuiltinsOffset)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3151 | } |
| 3152 | |
| 3153 | // Push the arguments ("left-to-right"). |
| 3154 | for (int i = 0; i < args->length(); i++) |
| 3155 | Load(args->at(i)); |
| 3156 | |
| 3157 | if (function != NULL) { |
| 3158 | // Call the C runtime function. |
| 3159 | __ CallRuntime(function, args->length()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3160 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3161 | } else { |
| 3162 | // Call the JS runtime function. |
| 3163 | Handle<Code> stub = ComputeCallInitialize(args->length()); |
| 3164 | __ Set(eax, Immediate(args->length())); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 3165 | __ call(stub, RelocInfo::CODE_TARGET); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3166 | __ mov(esi, frame_->Context()); |
| 3167 | __ mov(frame_->Top(), eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3168 | } |
| 3169 | } |
| 3170 | |
| 3171 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3172 | void CodeGenerator::VisitUnaryOperation(UnaryOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3173 | Comment cmnt(masm_, "[ UnaryOperation"); |
| 3174 | |
| 3175 | Token::Value op = node->op(); |
| 3176 | |
| 3177 | if (op == Token::NOT) { |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3178 | LoadCondition(node->expression(), NOT_INSIDE_TYPEOF, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3179 | false_target(), true_target(), true); |
| 3180 | cc_reg_ = NegateCondition(cc_reg_); |
| 3181 | |
| 3182 | } else if (op == Token::DELETE) { |
| 3183 | Property* property = node->expression()->AsProperty(); |
| 3184 | if (property != NULL) { |
| 3185 | Load(property->obj()); |
| 3186 | Load(property->key()); |
| 3187 | __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3188 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3189 | return; |
| 3190 | } |
| 3191 | |
| 3192 | Variable* variable = node->expression()->AsVariableProxy()->AsVariable(); |
| 3193 | if (variable != NULL) { |
| 3194 | Slot* slot = variable->slot(); |
| 3195 | if (variable->is_global()) { |
| 3196 | LoadGlobal(); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3197 | frame_->Push(Immediate(variable->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3198 | __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3199 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3200 | return; |
| 3201 | |
| 3202 | } else if (slot != NULL && slot->type() == Slot::LOOKUP) { |
| 3203 | // lookup the context holding the named variable |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3204 | frame_->Push(esi); |
| 3205 | frame_->Push(Immediate(variable->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3206 | __ CallRuntime(Runtime::kLookupContext, 2); |
| 3207 | // eax: context |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3208 | frame_->Push(eax); |
| 3209 | frame_->Push(Immediate(variable->name())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3210 | __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3211 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3212 | return; |
| 3213 | } |
| 3214 | |
| 3215 | // Default: Result of deleting non-global, not dynamically |
| 3216 | // introduced variables is false. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3217 | frame_->Push(Immediate(Factory::false_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3218 | |
| 3219 | } else { |
| 3220 | // Default: Result of deleting expressions is true. |
| 3221 | Load(node->expression()); // may have side-effects |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3222 | __ Set(frame_->Top(), Immediate(Factory::true_value())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3223 | } |
| 3224 | |
| 3225 | } else if (op == Token::TYPEOF) { |
| 3226 | // Special case for loading the typeof expression; see comment on |
| 3227 | // LoadTypeofExpression(). |
| 3228 | LoadTypeofExpression(node->expression()); |
| 3229 | __ CallRuntime(Runtime::kTypeof, 1); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3230 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3231 | |
| 3232 | } else { |
| 3233 | Load(node->expression()); |
| 3234 | switch (op) { |
| 3235 | case Token::NOT: |
| 3236 | case Token::DELETE: |
| 3237 | case Token::TYPEOF: |
| 3238 | UNREACHABLE(); // handled above |
| 3239 | break; |
| 3240 | |
| 3241 | case Token::SUB: { |
| 3242 | UnarySubStub stub; |
| 3243 | // TODO(1222589): remove dependency of TOS being cached inside stub |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3244 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3245 | __ CallStub(&stub); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3246 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3247 | break; |
| 3248 | } |
| 3249 | |
| 3250 | case Token::BIT_NOT: { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3251 | // Smi check. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3252 | Label smi_label; |
| 3253 | Label continue_label; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3254 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3255 | __ test(eax, Immediate(kSmiTagMask)); |
| 3256 | __ j(zero, &smi_label, taken); |
| 3257 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3258 | frame_->Push(eax); // undo popping of TOS |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3259 | __ InvokeBuiltin(Builtins::BIT_NOT, CALL_FUNCTION); |
| 3260 | |
| 3261 | __ jmp(&continue_label); |
| 3262 | __ bind(&smi_label); |
| 3263 | __ not_(eax); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3264 | __ and_(eax, ~kSmiTagMask); // Remove inverted smi-tag. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3265 | __ bind(&continue_label); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3266 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3267 | break; |
| 3268 | } |
| 3269 | |
| 3270 | case Token::VOID: |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3271 | __ mov(frame_->Top(), Factory::undefined_value()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3272 | break; |
| 3273 | |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 3274 | case Token::ADD: { |
| 3275 | // Smi check. |
| 3276 | Label continue_label; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3277 | frame_->Pop(eax); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 3278 | __ test(eax, Immediate(kSmiTagMask)); |
| 3279 | __ j(zero, &continue_label); |
| 3280 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3281 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3282 | __ InvokeBuiltin(Builtins::TO_NUMBER, CALL_FUNCTION); |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 3283 | |
| 3284 | __ bind(&continue_label); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3285 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3286 | break; |
mads.s.ager@gmail.com | 769cc96 | 2008-08-06 10:02:49 +0000 | [diff] [blame] | 3287 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3288 | |
| 3289 | default: |
| 3290 | UNREACHABLE(); |
| 3291 | } |
| 3292 | } |
| 3293 | } |
| 3294 | |
| 3295 | |
| 3296 | class CountOperationDeferred: public DeferredCode { |
| 3297 | public: |
| 3298 | CountOperationDeferred(CodeGenerator* generator, |
| 3299 | bool is_postfix, |
| 3300 | bool is_increment, |
| 3301 | int result_offset) |
| 3302 | : DeferredCode(generator), |
| 3303 | is_postfix_(is_postfix), |
| 3304 | is_increment_(is_increment), |
| 3305 | result_offset_(result_offset) { |
| 3306 | set_comment("[ CountOperationDeferred"); |
| 3307 | } |
| 3308 | |
| 3309 | virtual void Generate(); |
| 3310 | |
| 3311 | private: |
| 3312 | bool is_postfix_; |
| 3313 | bool is_increment_; |
| 3314 | int result_offset_; |
| 3315 | }; |
| 3316 | |
| 3317 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3318 | class RevertToNumberStub: public CodeStub { |
| 3319 | public: |
| 3320 | explicit RevertToNumberStub(bool is_increment) |
| 3321 | : is_increment_(is_increment) { } |
| 3322 | |
| 3323 | private: |
| 3324 | bool is_increment_; |
| 3325 | |
| 3326 | Major MajorKey() { return RevertToNumber; } |
| 3327 | int MinorKey() { return is_increment_ ? 1 : 0; } |
| 3328 | void Generate(MacroAssembler* masm); |
| 3329 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3330 | #ifdef DEBUG |
| 3331 | void Print() { |
| 3332 | PrintF("RevertToNumberStub (is_increment %s)\n", |
| 3333 | is_increment_ ? "true" : "false"); |
| 3334 | } |
| 3335 | #endif |
| 3336 | }; |
| 3337 | |
| 3338 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3339 | class CounterOpStub: public CodeStub { |
| 3340 | public: |
| 3341 | CounterOpStub(int result_offset, bool is_postfix, bool is_increment) |
| 3342 | : result_offset_(result_offset), |
| 3343 | is_postfix_(is_postfix), |
| 3344 | is_increment_(is_increment) { } |
| 3345 | |
| 3346 | private: |
| 3347 | int result_offset_; |
| 3348 | bool is_postfix_; |
| 3349 | bool is_increment_; |
| 3350 | |
| 3351 | Major MajorKey() { return CounterOp; } |
| 3352 | int MinorKey() { |
| 3353 | return ((result_offset_ << 2) | |
| 3354 | (is_postfix_ ? 2 : 0) | |
| 3355 | (is_increment_ ? 1 : 0)); |
| 3356 | } |
| 3357 | void Generate(MacroAssembler* masm); |
| 3358 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3359 | #ifdef DEBUG |
| 3360 | void Print() { |
| 3361 | PrintF("CounterOpStub (result_offset %d), (is_postfix %s)," |
| 3362 | " (is_increment %s)\n", |
| 3363 | result_offset_, |
| 3364 | is_postfix_ ? "true" : "false", |
| 3365 | is_increment_ ? "true" : "false"); |
| 3366 | } |
| 3367 | #endif |
| 3368 | }; |
| 3369 | |
| 3370 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3371 | void CountOperationDeferred::Generate() { |
| 3372 | if (is_postfix_) { |
| 3373 | RevertToNumberStub to_number_stub(is_increment_); |
| 3374 | __ CallStub(&to_number_stub); |
| 3375 | } |
| 3376 | CounterOpStub stub(result_offset_, is_postfix_, is_increment_); |
| 3377 | __ CallStub(&stub); |
| 3378 | } |
| 3379 | |
| 3380 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3381 | void CodeGenerator::VisitCountOperation(CountOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3382 | Comment cmnt(masm_, "[ CountOperation"); |
| 3383 | |
| 3384 | bool is_postfix = node->is_postfix(); |
| 3385 | bool is_increment = node->op() == Token::INC; |
| 3386 | |
| 3387 | Variable* var = node->expression()->AsVariableProxy()->AsVariable(); |
| 3388 | bool is_const = (var != NULL && var->mode() == Variable::CONST); |
| 3389 | |
| 3390 | // Postfix: Make room for the result. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3391 | if (is_postfix) { |
| 3392 | frame_->Push(Immediate(0)); |
| 3393 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3394 | |
| 3395 | { Reference target(this, node->expression()); |
| 3396 | if (target.is_illegal()) return; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3397 | target.GetValue(NOT_INSIDE_TYPEOF); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3398 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3399 | CountOperationDeferred* deferred = |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3400 | new CountOperationDeferred(this, is_postfix, is_increment, |
| 3401 | target.size() * kPointerSize); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3402 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3403 | frame_->Pop(eax); // Load TOS into eax for calculations below |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3404 | |
| 3405 | // Postfix: Store the old value as the result. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3406 | if (is_postfix) { |
| 3407 | __ mov(frame_->Element(target.size()), eax); |
| 3408 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3409 | |
| 3410 | // Perform optimistic increment/decrement. |
| 3411 | if (is_increment) { |
| 3412 | __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| 3413 | } else { |
| 3414 | __ sub(Operand(eax), Immediate(Smi::FromInt(1))); |
| 3415 | } |
| 3416 | |
| 3417 | // If the count operation didn't overflow and the result is a |
| 3418 | // valid smi, we're done. Otherwise, we jump to the deferred |
| 3419 | // slow-case code. |
| 3420 | __ j(overflow, deferred->enter(), not_taken); |
| 3421 | __ test(eax, Immediate(kSmiTagMask)); |
| 3422 | __ j(not_zero, deferred->enter(), not_taken); |
| 3423 | |
| 3424 | // Store the new value in the target if not const. |
| 3425 | __ bind(deferred->exit()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3426 | frame_->Push(eax); // Push the new value to TOS |
| 3427 | if (!is_const) target.SetValue(NOT_CONST_INIT); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3428 | } |
| 3429 | |
| 3430 | // Postfix: Discard the new value and use the old. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3431 | if (is_postfix) { |
| 3432 | frame_->Pop(); |
| 3433 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3434 | } |
| 3435 | |
| 3436 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3437 | void CodeGenerator::VisitBinaryOperation(BinaryOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3438 | Comment cmnt(masm_, "[ BinaryOperation"); |
| 3439 | Token::Value op = node->op(); |
| 3440 | |
| 3441 | // According to ECMA-262 section 11.11, page 58, the binary logical |
| 3442 | // operators must yield the result of one of the two expressions |
| 3443 | // before any ToBoolean() conversions. This means that the value |
| 3444 | // produced by a && or || operator is not necessarily a boolean. |
| 3445 | |
| 3446 | // NOTE: If the left hand side produces a materialized value (not in |
| 3447 | // the CC register), we force the right hand side to do the |
| 3448 | // same. This is necessary because we may have to branch to the exit |
| 3449 | // after evaluating the left hand side (due to the shortcut |
| 3450 | // semantics), but the compiler must (statically) know if the result |
| 3451 | // of compiling the binary operation is materialized or not. |
| 3452 | |
| 3453 | if (op == Token::AND) { |
| 3454 | Label is_true; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3455 | LoadCondition(node->left(), NOT_INSIDE_TYPEOF, &is_true, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3456 | false_target(), false); |
| 3457 | if (has_cc()) { |
| 3458 | Branch(false, false_target()); |
| 3459 | |
| 3460 | // Evaluate right side expression. |
| 3461 | __ bind(&is_true); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3462 | LoadCondition(node->right(), NOT_INSIDE_TYPEOF, true_target(), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3463 | false_target(), false); |
| 3464 | |
| 3465 | } else { |
| 3466 | Label pop_and_continue, exit; |
| 3467 | |
| 3468 | // Avoid popping the result if it converts to 'false' using the |
| 3469 | // standard ToBoolean() conversion as described in ECMA-262, |
| 3470 | // section 9.2, page 30. |
| 3471 | // Duplicate the TOS value. The duplicate will be popped by ToBoolean. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3472 | __ mov(eax, frame_->Top()); |
| 3473 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3474 | ToBoolean(&pop_and_continue, &exit); |
| 3475 | Branch(false, &exit); |
| 3476 | |
| 3477 | // Pop the result of evaluating the first part. |
| 3478 | __ bind(&pop_and_continue); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3479 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3480 | |
| 3481 | // Evaluate right side expression. |
| 3482 | __ bind(&is_true); |
| 3483 | Load(node->right()); |
| 3484 | |
| 3485 | // Exit (always with a materialized value). |
| 3486 | __ bind(&exit); |
| 3487 | } |
| 3488 | |
| 3489 | } else if (op == Token::OR) { |
| 3490 | Label is_false; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3491 | LoadCondition(node->left(), NOT_INSIDE_TYPEOF, true_target(), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3492 | &is_false, false); |
| 3493 | if (has_cc()) { |
| 3494 | Branch(true, true_target()); |
| 3495 | |
| 3496 | // Evaluate right side expression. |
| 3497 | __ bind(&is_false); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3498 | LoadCondition(node->right(), NOT_INSIDE_TYPEOF, true_target(), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3499 | false_target(), false); |
| 3500 | |
| 3501 | } else { |
| 3502 | Label pop_and_continue, exit; |
| 3503 | |
| 3504 | // Avoid popping the result if it converts to 'true' using the |
| 3505 | // standard ToBoolean() conversion as described in ECMA-262, |
| 3506 | // section 9.2, page 30. |
| 3507 | // Duplicate the TOS value. The duplicate will be popped by ToBoolean. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3508 | __ mov(eax, frame_->Top()); |
| 3509 | frame_->Push(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3510 | ToBoolean(&exit, &pop_and_continue); |
| 3511 | Branch(true, &exit); |
| 3512 | |
| 3513 | // Pop the result of evaluating the first part. |
| 3514 | __ bind(&pop_and_continue); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3515 | frame_->Pop(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3516 | |
| 3517 | // Evaluate right side expression. |
| 3518 | __ bind(&is_false); |
| 3519 | Load(node->right()); |
| 3520 | |
| 3521 | // Exit (always with a materialized value). |
| 3522 | __ bind(&exit); |
| 3523 | } |
| 3524 | |
| 3525 | } else { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 3526 | // NOTE: The code below assumes that the slow cases (calls to runtime) |
| 3527 | // never return a constant/immutable object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3528 | OverwriteMode overwrite_mode = NO_OVERWRITE; |
| 3529 | if (node->left()->AsBinaryOperation() != NULL && |
| 3530 | node->left()->AsBinaryOperation()->ResultOverwriteAllowed()) { |
| 3531 | overwrite_mode = OVERWRITE_LEFT; |
| 3532 | } else if (node->right()->AsBinaryOperation() != NULL && |
| 3533 | node->right()->AsBinaryOperation()->ResultOverwriteAllowed()) { |
| 3534 | overwrite_mode = OVERWRITE_RIGHT; |
| 3535 | } |
| 3536 | |
| 3537 | // Optimize for the case where (at least) one of the expressions |
| 3538 | // is a literal small integer. |
| 3539 | Literal* lliteral = node->left()->AsLiteral(); |
| 3540 | Literal* rliteral = node->right()->AsLiteral(); |
| 3541 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3542 | if (IsInlineSmi(rliteral)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3543 | Load(node->left()); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 3544 | SmiOperation(node->op(), node->type(), rliteral->handle(), false, |
| 3545 | overwrite_mode); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3546 | } else if (IsInlineSmi(lliteral)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3547 | Load(node->right()); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 3548 | SmiOperation(node->op(), node->type(), lliteral->handle(), true, |
| 3549 | overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3550 | } else { |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3551 | Load(node->left()); |
| 3552 | Load(node->right()); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 3553 | GenericBinaryOperation(node->op(), node->type(), overwrite_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3554 | } |
| 3555 | } |
| 3556 | } |
| 3557 | |
| 3558 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3559 | void CodeGenerator::VisitThisFunction(ThisFunction* node) { |
| 3560 | frame_->Push(frame_->Function()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3561 | } |
| 3562 | |
| 3563 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3564 | class InstanceofStub: public CodeStub { |
| 3565 | public: |
| 3566 | InstanceofStub() { } |
| 3567 | |
| 3568 | void Generate(MacroAssembler* masm); |
| 3569 | |
| 3570 | private: |
| 3571 | Major MajorKey() { return Instanceof; } |
| 3572 | int MinorKey() { return 0; } |
| 3573 | }; |
| 3574 | |
| 3575 | |
| 3576 | void CodeGenerator::VisitCompareOperation(CompareOperation* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3577 | Comment cmnt(masm_, "[ CompareOperation"); |
| 3578 | |
| 3579 | // Get the expressions from the node. |
| 3580 | Expression* left = node->left(); |
| 3581 | Expression* right = node->right(); |
| 3582 | Token::Value op = node->op(); |
| 3583 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3584 | // To make null checks efficient, we check if either left or right is the |
| 3585 | // literal 'null'. If so, we optimize the code by inlining a null check |
| 3586 | // instead of calling the (very) general runtime routine for checking |
| 3587 | // equality. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3588 | if (op == Token::EQ || op == Token::EQ_STRICT) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3589 | bool left_is_null = |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3590 | left->AsLiteral() != NULL && left->AsLiteral()->IsNull(); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 3591 | bool right_is_null = |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3592 | right->AsLiteral() != NULL && right->AsLiteral()->IsNull(); |
| 3593 | // The 'null' value can only be equal to 'null' or 'undefined'. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3594 | if (left_is_null || right_is_null) { |
| 3595 | Load(left_is_null ? right : left); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3596 | frame_->Pop(eax); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3597 | __ cmp(eax, Factory::null_value()); |
| 3598 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3599 | // The 'null' value is only equal to 'undefined' if using non-strict |
| 3600 | // comparisons. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3601 | if (op != Token::EQ_STRICT) { |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3602 | __ j(equal, true_target()); |
| 3603 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3604 | __ cmp(eax, Factory::undefined_value()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3605 | __ j(equal, true_target()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3606 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3607 | __ test(eax, Immediate(kSmiTagMask)); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3608 | __ j(equal, false_target()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3609 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3610 | // It can be an undetectable object. |
| 3611 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3612 | __ movzx_b(eax, FieldOperand(eax, Map::kBitFieldOffset)); |
| 3613 | __ and_(eax, 1 << Map::kIsUndetectable); |
| 3614 | __ cmp(eax, 1 << Map::kIsUndetectable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3615 | } |
| 3616 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3617 | cc_reg_ = equal; |
| 3618 | return; |
| 3619 | } |
| 3620 | } |
| 3621 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3622 | // To make typeof testing for natives implemented in JavaScript really |
| 3623 | // efficient, we generate special code for expressions of the form: |
| 3624 | // 'typeof <expression> == <string>'. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3625 | UnaryOperation* operation = left->AsUnaryOperation(); |
| 3626 | if ((op == Token::EQ || op == Token::EQ_STRICT) && |
| 3627 | (operation != NULL && operation->op() == Token::TYPEOF) && |
| 3628 | (right->AsLiteral() != NULL && |
| 3629 | right->AsLiteral()->handle()->IsString())) { |
| 3630 | Handle<String> check(String::cast(*right->AsLiteral()->handle())); |
| 3631 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3632 | // Load the operand and move it to register edx. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3633 | LoadTypeofExpression(operation->expression()); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3634 | frame_->Pop(edx); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3635 | |
| 3636 | if (check->Equals(Heap::number_symbol())) { |
| 3637 | __ test(edx, Immediate(kSmiTagMask)); |
| 3638 | __ j(zero, true_target()); |
| 3639 | __ mov(edx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3640 | __ cmp(edx, Factory::heap_number_map()); |
| 3641 | cc_reg_ = equal; |
| 3642 | |
| 3643 | } else if (check->Equals(Heap::string_symbol())) { |
| 3644 | __ test(edx, Immediate(kSmiTagMask)); |
| 3645 | __ j(zero, false_target()); |
| 3646 | |
| 3647 | __ mov(edx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3648 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3649 | // It can be an undetectable string object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3650 | __ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset)); |
| 3651 | __ and_(ecx, 1 << Map::kIsUndetectable); |
| 3652 | __ cmp(ecx, 1 << Map::kIsUndetectable); |
| 3653 | __ j(equal, false_target()); |
| 3654 | |
| 3655 | __ movzx_b(ecx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 3656 | __ cmp(ecx, FIRST_NONSTRING_TYPE); |
| 3657 | cc_reg_ = less; |
| 3658 | |
| 3659 | } else if (check->Equals(Heap::boolean_symbol())) { |
| 3660 | __ cmp(edx, Factory::true_value()); |
| 3661 | __ j(equal, true_target()); |
| 3662 | __ cmp(edx, Factory::false_value()); |
| 3663 | cc_reg_ = equal; |
| 3664 | |
| 3665 | } else if (check->Equals(Heap::undefined_symbol())) { |
| 3666 | __ cmp(edx, Factory::undefined_value()); |
| 3667 | __ j(equal, true_target()); |
| 3668 | |
| 3669 | __ test(edx, Immediate(kSmiTagMask)); |
| 3670 | __ j(zero, false_target()); |
| 3671 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3672 | // It can be an undetectable object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3673 | __ mov(edx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3674 | __ movzx_b(ecx, FieldOperand(edx, Map::kBitFieldOffset)); |
| 3675 | __ and_(ecx, 1 << Map::kIsUndetectable); |
| 3676 | __ cmp(ecx, 1 << Map::kIsUndetectable); |
| 3677 | |
| 3678 | cc_reg_ = equal; |
| 3679 | |
| 3680 | } else if (check->Equals(Heap::function_symbol())) { |
| 3681 | __ test(edx, Immediate(kSmiTagMask)); |
| 3682 | __ j(zero, false_target()); |
| 3683 | __ mov(edx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3684 | __ movzx_b(edx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 3685 | __ cmp(edx, JS_FUNCTION_TYPE); |
| 3686 | cc_reg_ = equal; |
| 3687 | |
| 3688 | } else if (check->Equals(Heap::object_symbol())) { |
| 3689 | __ test(edx, Immediate(kSmiTagMask)); |
| 3690 | __ j(zero, false_target()); |
| 3691 | |
| 3692 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 3693 | __ cmp(edx, Factory::null_value()); |
| 3694 | __ j(equal, true_target()); |
| 3695 | |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3696 | // It can be an undetectable object. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3697 | __ movzx_b(edx, FieldOperand(ecx, Map::kBitFieldOffset)); |
| 3698 | __ and_(edx, 1 << Map::kIsUndetectable); |
| 3699 | __ cmp(edx, 1 << Map::kIsUndetectable); |
| 3700 | __ j(equal, false_target()); |
| 3701 | |
| 3702 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 3703 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 3704 | __ j(less, false_target()); |
| 3705 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| 3706 | cc_reg_ = less_equal; |
| 3707 | |
| 3708 | } else { |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 3709 | // Uncommon case: typeof testing against a string literal that is |
| 3710 | // never returned from the typeof operator. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3711 | __ jmp(false_target()); |
| 3712 | } |
| 3713 | return; |
| 3714 | } |
| 3715 | |
| 3716 | Condition cc = no_condition; |
| 3717 | bool strict = false; |
| 3718 | switch (op) { |
| 3719 | case Token::EQ_STRICT: |
| 3720 | strict = true; |
| 3721 | // Fall through |
| 3722 | case Token::EQ: |
| 3723 | cc = equal; |
| 3724 | break; |
| 3725 | case Token::LT: |
| 3726 | cc = less; |
| 3727 | break; |
| 3728 | case Token::GT: |
| 3729 | cc = greater; |
| 3730 | break; |
| 3731 | case Token::LTE: |
| 3732 | cc = less_equal; |
| 3733 | break; |
| 3734 | case Token::GTE: |
| 3735 | cc = greater_equal; |
| 3736 | break; |
| 3737 | case Token::IN: { |
| 3738 | Load(left); |
| 3739 | Load(right); |
| 3740 | __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3741 | frame_->Push(eax); // push the result |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3742 | return; |
| 3743 | } |
| 3744 | case Token::INSTANCEOF: { |
| 3745 | Load(left); |
| 3746 | Load(right); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3747 | InstanceofStub stub; |
| 3748 | __ CallStub(&stub); |
| 3749 | __ test(eax, Operand(eax)); |
| 3750 | cc_reg_ = zero; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3751 | return; |
| 3752 | } |
| 3753 | default: |
| 3754 | UNREACHABLE(); |
| 3755 | } |
| 3756 | |
| 3757 | // Optimize for the case where (at least) one of the expressions |
| 3758 | // is a literal small integer. |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3759 | if (IsInlineSmi(left->AsLiteral())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3760 | Load(right); |
| 3761 | SmiComparison(ReverseCondition(cc), left->AsLiteral()->handle(), strict); |
| 3762 | return; |
| 3763 | } |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 3764 | if (IsInlineSmi(right->AsLiteral())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3765 | Load(left); |
| 3766 | SmiComparison(cc, right->AsLiteral()->handle(), strict); |
| 3767 | return; |
| 3768 | } |
| 3769 | |
| 3770 | Load(left); |
| 3771 | Load(right); |
| 3772 | Comparison(cc, strict); |
| 3773 | } |
| 3774 | |
| 3775 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3776 | void CodeGenerator::RecordStatementPosition(Node* node) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3777 | if (FLAG_debug_info) { |
| 3778 | int pos = node->statement_pos(); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 3779 | if (pos != RelocInfo::kNoPosition) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3780 | __ RecordStatementPosition(pos); |
| 3781 | } |
| 3782 | } |
| 3783 | } |
| 3784 | |
| 3785 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3786 | #undef __ |
| 3787 | #define __ masm-> |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3788 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3789 | Handle<String> Reference::GetName() { |
| 3790 | ASSERT(type_ == NAMED); |
| 3791 | Property* property = expression_->AsProperty(); |
| 3792 | if (property == NULL) { |
| 3793 | // Global variable reference treated as a named property reference. |
| 3794 | VariableProxy* proxy = expression_->AsVariableProxy(); |
| 3795 | ASSERT(proxy->AsVariable() != NULL); |
| 3796 | ASSERT(proxy->AsVariable()->is_global()); |
| 3797 | return proxy->name(); |
| 3798 | } else { |
| 3799 | MacroAssembler* masm = cgen_->masm(); |
| 3800 | __ RecordPosition(property->position()); |
| 3801 | Literal* raw_name = property->key()->AsLiteral(); |
| 3802 | ASSERT(raw_name != NULL); |
| 3803 | return Handle<String>(String::cast(*raw_name->handle())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 3804 | } |
| 3805 | } |
| 3806 | |
| 3807 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3808 | void Reference::GetValue(TypeofState typeof_state) { |
| 3809 | ASSERT(!is_illegal()); |
| 3810 | ASSERT(!cgen_->has_cc()); |
| 3811 | MacroAssembler* masm = cgen_->masm(); |
| 3812 | VirtualFrame* frame = cgen_->frame(); |
| 3813 | switch (type_) { |
| 3814 | case SLOT: { |
| 3815 | Comment cmnt(masm, "[ Load from Slot"); |
| 3816 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 3817 | ASSERT(slot != NULL); |
| 3818 | cgen_->LoadFromSlot(slot, typeof_state); |
| 3819 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3820 | } |
| 3821 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3822 | case NAMED: { |
| 3823 | // TODO(1241834): Make sure that this it is safe to ignore the |
| 3824 | // distinction between expressions in a typeof and not in a typeof. If |
| 3825 | // there is a chance that reference errors can be thrown below, we |
| 3826 | // must distinguish between the two kinds of loads (typeof expression |
| 3827 | // loads must not throw a reference error). |
| 3828 | Comment cmnt(masm, "[ Load from named Property"); |
| 3829 | Handle<String> name(GetName()); |
| 3830 | Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| 3831 | // Setup the name register. |
| 3832 | __ mov(ecx, name); |
| 3833 | |
| 3834 | Variable* var = expression_->AsVariableProxy()->AsVariable(); |
| 3835 | if (var != NULL) { |
| 3836 | ASSERT(var->is_global()); |
| 3837 | __ call(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| 3838 | } else { |
| 3839 | __ call(ic, RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3840 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3841 | frame->Push(eax); // IC call leaves result in eax, push it out |
| 3842 | break; |
| 3843 | } |
| 3844 | |
| 3845 | case KEYED: { |
| 3846 | // TODO(1241834): Make sure that this it is safe to ignore the |
| 3847 | // distinction between expressions in a typeof and not in a typeof. |
| 3848 | Comment cmnt(masm, "[ Load from keyed Property"); |
| 3849 | Property* property = expression_->AsProperty(); |
| 3850 | ASSERT(property != NULL); |
| 3851 | __ RecordPosition(property->position()); |
| 3852 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| 3853 | |
| 3854 | Variable* var = expression_->AsVariableProxy()->AsVariable(); |
| 3855 | if (var != NULL) { |
| 3856 | ASSERT(var->is_global()); |
| 3857 | __ call(ic, RelocInfo::CODE_TARGET_CONTEXT); |
| 3858 | } else { |
| 3859 | __ call(ic, RelocInfo::CODE_TARGET); |
| 3860 | } |
| 3861 | frame->Push(eax); // IC call leaves result in eax, push it out |
| 3862 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3863 | } |
| 3864 | |
| 3865 | default: |
| 3866 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3867 | } |
| 3868 | } |
| 3869 | |
| 3870 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3871 | void Reference::SetValue(InitState init_state) { |
| 3872 | ASSERT(!is_illegal()); |
| 3873 | ASSERT(!cgen_->has_cc()); |
| 3874 | MacroAssembler* masm = cgen_->masm(); |
| 3875 | VirtualFrame* frame = cgen_->frame(); |
| 3876 | switch (type_) { |
| 3877 | case SLOT: { |
| 3878 | Comment cmnt(masm, "[ Store to Slot"); |
| 3879 | Slot* slot = expression_->AsVariableProxy()->AsVariable()->slot(); |
| 3880 | ASSERT(slot != NULL); |
| 3881 | if (slot->type() == Slot::LOOKUP) { |
| 3882 | ASSERT(slot->var()->mode() == Variable::DYNAMIC); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3883 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3884 | // For now, just do a runtime call. |
| 3885 | frame->Push(esi); |
| 3886 | frame->Push(Immediate(slot->var()->name())); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3887 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3888 | if (init_state == CONST_INIT) { |
| 3889 | // Same as the case for a normal store, but ignores attribute |
| 3890 | // (e.g. READ_ONLY) of context slot so that we can initialize |
| 3891 | // const properties (introduced via eval("const foo = (some |
| 3892 | // expr);")). Also, uses the current function context instead of |
| 3893 | // the top context. |
| 3894 | // |
| 3895 | // Note that we must declare the foo upon entry of eval(), via a |
| 3896 | // context slot declaration, but we cannot initialize it at the |
| 3897 | // same time, because the const declaration may be at the end of |
| 3898 | // the eval code (sigh...) and the const variable may have been |
| 3899 | // used before (where its value is 'undefined'). Thus, we can only |
| 3900 | // do the initialization when we actually encounter the expression |
| 3901 | // and when the expression operands are defined and valid, and |
| 3902 | // thus we need the split into 2 operations: declaration of the |
| 3903 | // context slot followed by initialization. |
| 3904 | __ CallRuntime(Runtime::kInitializeConstContextSlot, 3); |
| 3905 | } else { |
| 3906 | __ CallRuntime(Runtime::kStoreContextSlot, 3); |
| 3907 | } |
| 3908 | // Storing a variable must keep the (new) value on the expression |
| 3909 | // stack. This is necessary for compiling chained assignment |
| 3910 | // expressions. |
| 3911 | frame->Push(eax); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3912 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3913 | } else { |
| 3914 | ASSERT(slot->var()->mode() != Variable::DYNAMIC); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3915 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3916 | Label exit; |
| 3917 | if (init_state == CONST_INIT) { |
| 3918 | ASSERT(slot->var()->mode() == Variable::CONST); |
| 3919 | // Only the first const initialization must be executed (the slot |
| 3920 | // still contains 'the hole' value). When the assignment is |
| 3921 | // executed, the code is identical to a normal store (see below). |
| 3922 | Comment cmnt(masm, "[ Init const"); |
| 3923 | __ mov(eax, cgen_->SlotOperand(slot, ecx)); |
| 3924 | __ cmp(eax, Factory::the_hole_value()); |
| 3925 | __ j(not_equal, &exit); |
| 3926 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3927 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3928 | // We must execute the store. Storing a variable must keep the |
| 3929 | // (new) value on the stack. This is necessary for compiling |
| 3930 | // assignment expressions. |
| 3931 | // |
| 3932 | // Note: We will reach here even with slot->var()->mode() == |
| 3933 | // Variable::CONST because of const declarations which will |
| 3934 | // initialize consts to 'the hole' value and by doing so, end up |
| 3935 | // calling this code. |
| 3936 | frame->Pop(eax); |
| 3937 | __ mov(cgen_->SlotOperand(slot, ecx), eax); |
| 3938 | frame->Push(eax); // RecordWrite may destroy the value in eax. |
| 3939 | if (slot->type() == Slot::CONTEXT) { |
| 3940 | // ecx is loaded with context when calling SlotOperand above. |
| 3941 | int offset = FixedArray::kHeaderSize + slot->index() * kPointerSize; |
| 3942 | __ RecordWrite(ecx, offset, eax, ebx); |
| 3943 | } |
| 3944 | // If we definitely did not jump over the assignment, we do not need |
| 3945 | // to bind the exit label. Doing so can defeat peephole |
| 3946 | // optimization. |
| 3947 | if (init_state == CONST_INIT) __ bind(&exit); |
| 3948 | } |
| 3949 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3950 | } |
| 3951 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3952 | case NAMED: { |
| 3953 | Comment cmnt(masm, "[ Store to named Property"); |
| 3954 | // Call the appropriate IC code. |
| 3955 | Handle<String> name(GetName()); |
| 3956 | Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Initialize)); |
| 3957 | // TODO(1222589): Make the IC grab the values from the stack. |
| 3958 | frame->Pop(eax); |
| 3959 | // Setup the name register. |
| 3960 | __ mov(ecx, name); |
| 3961 | __ call(ic, RelocInfo::CODE_TARGET); |
| 3962 | frame->Push(eax); // IC call leaves result in eax, push it out |
| 3963 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3964 | } |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 3965 | |
| 3966 | case KEYED: { |
| 3967 | Comment cmnt(masm, "[ Store to keyed Property"); |
| 3968 | Property* property = expression_->AsProperty(); |
| 3969 | ASSERT(property != NULL); |
| 3970 | __ RecordPosition(property->position()); |
| 3971 | // Call IC code. |
| 3972 | Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Initialize)); |
| 3973 | // TODO(1222589): Make the IC grab the values from the stack. |
| 3974 | frame->Pop(eax); |
| 3975 | __ call(ic, RelocInfo::CODE_TARGET); |
| 3976 | frame->Push(eax); // IC call leaves result in eax, push it out |
| 3977 | break; |
| 3978 | } |
| 3979 | |
| 3980 | default: |
| 3981 | UNREACHABLE(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 3982 | } |
| 3983 | } |
| 3984 | |
| 3985 | |
| 3986 | // NOTE: The stub does not handle the inlined cases (Smis, Booleans, undefined). |
| 3987 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
| 3988 | Label false_result, true_result, not_string; |
| 3989 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 3990 | |
| 3991 | // 'null' => false. |
| 3992 | __ cmp(eax, Factory::null_value()); |
| 3993 | __ j(equal, &false_result); |
| 3994 | |
| 3995 | // Get the map and type of the heap object. |
| 3996 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 3997 | __ movzx_b(ecx, FieldOperand(edx, Map::kInstanceTypeOffset)); |
| 3998 | |
| 3999 | // Undetectable => false. |
| 4000 | __ movzx_b(ebx, FieldOperand(edx, Map::kBitFieldOffset)); |
| 4001 | __ and_(ebx, 1 << Map::kIsUndetectable); |
| 4002 | __ j(not_zero, &false_result); |
| 4003 | |
| 4004 | // JavaScript object => true. |
| 4005 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 4006 | __ j(above_equal, &true_result); |
| 4007 | |
| 4008 | // String value => false iff empty. |
| 4009 | __ cmp(ecx, FIRST_NONSTRING_TYPE); |
| 4010 | __ j(above_equal, ¬_string); |
| 4011 | __ and_(ecx, kStringSizeMask); |
| 4012 | __ cmp(ecx, kShortStringTag); |
| 4013 | __ j(not_equal, &true_result); // Empty string is always short. |
| 4014 | __ mov(edx, FieldOperand(eax, String::kLengthOffset)); |
| 4015 | __ shr(edx, String::kShortLengthShift); |
| 4016 | __ j(zero, &false_result); |
| 4017 | __ jmp(&true_result); |
| 4018 | |
| 4019 | __ bind(¬_string); |
| 4020 | // HeapNumber => false iff +0, -0, or NaN. |
| 4021 | __ cmp(edx, Factory::heap_number_map()); |
| 4022 | __ j(not_equal, &true_result); |
| 4023 | __ fldz(); |
| 4024 | __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 4025 | __ fucompp(); |
| 4026 | __ push(eax); |
| 4027 | __ fnstsw_ax(); |
| 4028 | __ sahf(); |
| 4029 | __ pop(eax); |
| 4030 | __ j(zero, &false_result); |
| 4031 | // Fall through to |true_result|. |
| 4032 | |
| 4033 | // Return 1/0 for true/false in eax. |
| 4034 | __ bind(&true_result); |
| 4035 | __ mov(eax, 1); |
| 4036 | __ ret(1 * kPointerSize); |
| 4037 | __ bind(&false_result); |
| 4038 | __ mov(eax, 0); |
| 4039 | __ ret(1 * kPointerSize); |
| 4040 | } |
| 4041 | |
| 4042 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4043 | void GenericBinaryOpStub::GenerateSmiCode(MacroAssembler* masm, Label* slow) { |
| 4044 | // Perform fast-case smi code for the operation (eax <op> ebx) and |
| 4045 | // leave result in register eax. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4046 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4047 | // Prepare the smi check of both operands by or'ing them together |
| 4048 | // before checking against the smi mask. |
| 4049 | __ mov(ecx, Operand(ebx)); |
| 4050 | __ or_(ecx, Operand(eax)); |
| 4051 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4052 | switch (op_) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4053 | case Token::ADD: |
| 4054 | __ add(eax, Operand(ebx)); // add optimistically |
| 4055 | __ j(overflow, slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4056 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4057 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4058 | case Token::SUB: |
| 4059 | __ sub(eax, Operand(ebx)); // subtract optimistically |
| 4060 | __ j(overflow, slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4061 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4062 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4063 | case Token::DIV: |
| 4064 | case Token::MOD: |
| 4065 | // Sign extend eax into edx:eax. |
| 4066 | __ cdq(); |
| 4067 | // Check for 0 divisor. |
| 4068 | __ test(ebx, Operand(ebx)); |
| 4069 | __ j(zero, slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4070 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4071 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4072 | default: |
| 4073 | // Fall-through to smi check. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4074 | break; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4075 | } |
| 4076 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4077 | // Perform the actual smi check. |
| 4078 | ASSERT(kSmiTag == 0); // adjust zero check if not the case |
| 4079 | __ test(ecx, Immediate(kSmiTagMask)); |
| 4080 | __ j(not_zero, slow, not_taken); |
| 4081 | |
| 4082 | switch (op_) { |
| 4083 | case Token::ADD: |
| 4084 | case Token::SUB: |
| 4085 | // Do nothing here. |
| 4086 | break; |
| 4087 | |
| 4088 | case Token::MUL: |
| 4089 | // If the smi tag is 0 we can just leave the tag on one operand. |
| 4090 | ASSERT(kSmiTag == 0); // adjust code below if not the case |
| 4091 | // Remove tag from one of the operands (but keep sign). |
| 4092 | __ sar(eax, kSmiTagSize); |
| 4093 | // Do multiplication. |
| 4094 | __ imul(eax, Operand(ebx)); // multiplication of smis; result in eax |
| 4095 | // Go slow on overflows. |
| 4096 | __ j(overflow, slow, not_taken); |
| 4097 | // Check for negative zero result. |
| 4098 | __ NegativeZeroTest(eax, ecx, slow); // use ecx = x | y |
| 4099 | break; |
| 4100 | |
| 4101 | case Token::DIV: |
| 4102 | // Divide edx:eax by ebx. |
| 4103 | __ idiv(ebx); |
| 4104 | // Check for the corner case of dividing the most negative smi |
| 4105 | // by -1. We cannot use the overflow flag, since it is not set |
| 4106 | // by idiv instruction. |
| 4107 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 4108 | __ cmp(eax, 0x40000000); |
| 4109 | __ j(equal, slow); |
| 4110 | // Check for negative zero result. |
| 4111 | __ NegativeZeroTest(eax, ecx, slow); // use ecx = x | y |
| 4112 | // Check that the remainder is zero. |
| 4113 | __ test(edx, Operand(edx)); |
| 4114 | __ j(not_zero, slow); |
| 4115 | // Tag the result and store it in register eax. |
| 4116 | ASSERT(kSmiTagSize == times_2); // adjust code if not the case |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 4117 | __ lea(eax, Operand(eax, eax, times_1, kSmiTag)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4118 | break; |
| 4119 | |
| 4120 | case Token::MOD: |
| 4121 | // Divide edx:eax by ebx. |
| 4122 | __ idiv(ebx); |
| 4123 | // Check for negative zero result. |
| 4124 | __ NegativeZeroTest(edx, ecx, slow); // use ecx = x | y |
| 4125 | // Move remainder to register eax. |
| 4126 | __ mov(eax, Operand(edx)); |
| 4127 | break; |
| 4128 | |
| 4129 | case Token::BIT_OR: |
| 4130 | __ or_(eax, Operand(ebx)); |
| 4131 | break; |
| 4132 | |
| 4133 | case Token::BIT_AND: |
| 4134 | __ and_(eax, Operand(ebx)); |
| 4135 | break; |
| 4136 | |
| 4137 | case Token::BIT_XOR: |
| 4138 | __ xor_(eax, Operand(ebx)); |
| 4139 | break; |
| 4140 | |
| 4141 | case Token::SHL: |
| 4142 | case Token::SHR: |
| 4143 | case Token::SAR: |
| 4144 | // Move the second operand into register ecx. |
| 4145 | __ mov(ecx, Operand(ebx)); |
| 4146 | // Remove tags from operands (but keep sign). |
| 4147 | __ sar(eax, kSmiTagSize); |
| 4148 | __ sar(ecx, kSmiTagSize); |
| 4149 | // Perform the operation. |
| 4150 | switch (op_) { |
| 4151 | case Token::SAR: |
| 4152 | __ sar(eax); |
| 4153 | // No checks of result necessary |
| 4154 | break; |
| 4155 | case Token::SHR: |
| 4156 | __ shr(eax); |
| 4157 | // Check that the *unsigned* result fits in a smi. |
| 4158 | // Neither of the two high-order bits can be set: |
| 4159 | // - 0x80000000: high bit would be lost when smi tagging. |
| 4160 | // - 0x40000000: this number would convert to negative when |
| 4161 | // Smi tagging these two cases can only happen with shifts |
| 4162 | // by 0 or 1 when handed a valid smi. |
| 4163 | __ test(eax, Immediate(0xc0000000)); |
| 4164 | __ j(not_zero, slow, not_taken); |
| 4165 | break; |
| 4166 | case Token::SHL: |
| 4167 | __ shl(eax); |
| 4168 | // Check that the *signed* result fits in a smi. |
| 4169 | __ lea(ecx, Operand(eax, 0x40000000)); |
| 4170 | __ test(ecx, Immediate(0x80000000)); |
| 4171 | __ j(not_zero, slow, not_taken); |
| 4172 | break; |
| 4173 | default: |
| 4174 | UNREACHABLE(); |
| 4175 | } |
| 4176 | // Tag the result and store it in register eax. |
| 4177 | ASSERT(kSmiTagSize == times_2); // adjust code if not the case |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 4178 | __ lea(eax, Operand(eax, eax, times_1, kSmiTag)); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4179 | break; |
| 4180 | |
| 4181 | default: |
| 4182 | UNREACHABLE(); |
| 4183 | break; |
| 4184 | } |
| 4185 | } |
| 4186 | |
| 4187 | |
| 4188 | void GenericBinaryOpStub::Generate(MacroAssembler* masm) { |
| 4189 | Label call_runtime; |
| 4190 | |
| 4191 | if (flags_ == SMI_CODE_IN_STUB) { |
| 4192 | // The fast case smi code wasn't inlined in the stub caller |
| 4193 | // code. Generate it here to speed up common operations. |
| 4194 | Label slow; |
| 4195 | __ mov(ebx, Operand(esp, 1 * kPointerSize)); // get y |
| 4196 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // get x |
| 4197 | GenerateSmiCode(masm, &slow); |
| 4198 | __ ret(2 * kPointerSize); // remove both operands |
| 4199 | |
| 4200 | // Too bad. The fast case smi code didn't succeed. |
| 4201 | __ bind(&slow); |
| 4202 | } |
| 4203 | |
| 4204 | // Setup registers. |
| 4205 | __ mov(eax, Operand(esp, 1 * kPointerSize)); // get y |
| 4206 | __ mov(edx, Operand(esp, 2 * kPointerSize)); // get x |
| 4207 | |
| 4208 | // Floating point case. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4209 | switch (op_) { |
| 4210 | case Token::ADD: |
| 4211 | case Token::SUB: |
| 4212 | case Token::MUL: |
| 4213 | case Token::DIV: { |
| 4214 | // eax: y |
| 4215 | // edx: x |
| 4216 | FloatingPointHelper::CheckFloatOperands(masm, &call_runtime, ebx); |
| 4217 | // Fast-case: Both operands are numbers. |
| 4218 | // Allocate a heap number, if needed. |
| 4219 | Label skip_allocation; |
| 4220 | switch (mode_) { |
| 4221 | case OVERWRITE_LEFT: |
| 4222 | __ mov(eax, Operand(edx)); |
| 4223 | // Fall through! |
| 4224 | case OVERWRITE_RIGHT: |
| 4225 | // If the argument in eax is already an object, we skip the |
| 4226 | // allocation of a heap number. |
| 4227 | __ test(eax, Immediate(kSmiTagMask)); |
| 4228 | __ j(not_zero, &skip_allocation, not_taken); |
| 4229 | // Fall through! |
| 4230 | case NO_OVERWRITE: |
| 4231 | FloatingPointHelper::AllocateHeapNumber(masm, |
| 4232 | &call_runtime, |
| 4233 | ecx, |
| 4234 | edx); |
| 4235 | __ bind(&skip_allocation); |
| 4236 | break; |
| 4237 | default: UNREACHABLE(); |
| 4238 | } |
| 4239 | FloatingPointHelper::LoadFloatOperands(masm, ecx); |
| 4240 | |
| 4241 | switch (op_) { |
| 4242 | case Token::ADD: __ faddp(1); break; |
| 4243 | case Token::SUB: __ fsubp(1); break; |
| 4244 | case Token::MUL: __ fmulp(1); break; |
| 4245 | case Token::DIV: __ fdivp(1); break; |
| 4246 | default: UNREACHABLE(); |
| 4247 | } |
| 4248 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 4249 | __ ret(2 * kPointerSize); |
| 4250 | } |
| 4251 | case Token::MOD: { |
| 4252 | // For MOD we go directly to runtime in the non-smi case. |
| 4253 | break; |
| 4254 | } |
| 4255 | case Token::BIT_OR: |
| 4256 | case Token::BIT_AND: |
| 4257 | case Token::BIT_XOR: |
| 4258 | case Token::SAR: |
| 4259 | case Token::SHL: |
| 4260 | case Token::SHR: { |
| 4261 | FloatingPointHelper::CheckFloatOperands(masm, &call_runtime, ebx); |
| 4262 | FloatingPointHelper::LoadFloatOperands(masm, ecx); |
| 4263 | |
| 4264 | Label non_int32_operands, non_smi_result, skip_allocation; |
| 4265 | // Reserve space for converted numbers. |
| 4266 | __ sub(Operand(esp), Immediate(2 * kPointerSize)); |
| 4267 | |
| 4268 | // Check if right operand is int32. |
| 4269 | __ fist_s(Operand(esp, 1 * kPointerSize)); |
| 4270 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 4271 | __ fucompp(); |
| 4272 | __ fnstsw_ax(); |
| 4273 | __ sahf(); |
| 4274 | __ j(not_zero, &non_int32_operands); |
| 4275 | __ j(parity_even, &non_int32_operands); |
| 4276 | |
| 4277 | // Check if left operand is int32. |
| 4278 | __ fist_s(Operand(esp, 0 * kPointerSize)); |
| 4279 | __ fild_s(Operand(esp, 0 * kPointerSize)); |
| 4280 | __ fucompp(); |
| 4281 | __ fnstsw_ax(); |
| 4282 | __ sahf(); |
| 4283 | __ j(not_zero, &non_int32_operands); |
| 4284 | __ j(parity_even, &non_int32_operands); |
| 4285 | |
| 4286 | // Get int32 operands and perform bitop. |
| 4287 | __ pop(eax); |
| 4288 | __ pop(ecx); |
| 4289 | switch (op_) { |
| 4290 | case Token::BIT_OR: __ or_(eax, Operand(ecx)); break; |
| 4291 | case Token::BIT_AND: __ and_(eax, Operand(ecx)); break; |
| 4292 | case Token::BIT_XOR: __ xor_(eax, Operand(ecx)); break; |
| 4293 | case Token::SAR: __ sar(eax); break; |
| 4294 | case Token::SHL: __ shl(eax); break; |
| 4295 | case Token::SHR: __ shr(eax); break; |
| 4296 | default: UNREACHABLE(); |
| 4297 | } |
| 4298 | |
| 4299 | // Check if result is non-negative and fits in a smi. |
| 4300 | __ test(eax, Immediate(0xc0000000)); |
| 4301 | __ j(not_zero, &non_smi_result); |
| 4302 | |
| 4303 | // Tag smi result and return. |
| 4304 | ASSERT(kSmiTagSize == times_2); // adjust code if not the case |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 4305 | __ lea(eax, Operand(eax, eax, times_1, kSmiTag)); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4306 | __ ret(2 * kPointerSize); |
| 4307 | |
| 4308 | // All ops except SHR return a signed int32 that we load in a HeapNumber. |
| 4309 | if (op_ != Token::SHR) { |
| 4310 | __ bind(&non_smi_result); |
| 4311 | // Allocate a heap number if needed. |
| 4312 | __ mov(ebx, Operand(eax)); // ebx: result |
| 4313 | switch (mode_) { |
| 4314 | case OVERWRITE_LEFT: |
| 4315 | case OVERWRITE_RIGHT: |
| 4316 | // If the operand was an object, we skip the |
| 4317 | // allocation of a heap number. |
| 4318 | __ mov(eax, Operand(esp, mode_ == OVERWRITE_RIGHT ? |
| 4319 | 1 * kPointerSize : 2 * kPointerSize)); |
| 4320 | __ test(eax, Immediate(kSmiTagMask)); |
| 4321 | __ j(not_zero, &skip_allocation, not_taken); |
| 4322 | // Fall through! |
| 4323 | case NO_OVERWRITE: |
| 4324 | FloatingPointHelper::AllocateHeapNumber(masm, &call_runtime, |
| 4325 | ecx, edx); |
| 4326 | __ bind(&skip_allocation); |
| 4327 | break; |
| 4328 | default: UNREACHABLE(); |
| 4329 | } |
| 4330 | // Store the result in the HeapNumber and return. |
| 4331 | __ mov(Operand(esp, 1 * kPointerSize), ebx); |
| 4332 | __ fild_s(Operand(esp, 1 * kPointerSize)); |
| 4333 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 4334 | __ ret(2 * kPointerSize); |
| 4335 | } |
| 4336 | __ bind(&non_int32_operands); |
| 4337 | // Restore stacks and operands before calling runtime. |
| 4338 | __ ffree(0); |
| 4339 | __ add(Operand(esp), Immediate(2 * kPointerSize)); |
| 4340 | |
| 4341 | // SHR should return uint32 - go to runtime for non-smi/negative result. |
| 4342 | if (op_ == Token::SHR) __ bind(&non_smi_result); |
| 4343 | __ mov(eax, Operand(esp, 1 * kPointerSize)); |
| 4344 | __ mov(edx, Operand(esp, 2 * kPointerSize)); |
| 4345 | break; |
| 4346 | } |
| 4347 | default: UNREACHABLE(); break; |
| 4348 | } |
| 4349 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 4350 | // If all else fails, use the runtime system to get the correct |
| 4351 | // result. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4352 | __ bind(&call_runtime); |
| 4353 | switch (op_) { |
| 4354 | case Token::ADD: |
| 4355 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 4356 | break; |
| 4357 | case Token::SUB: |
| 4358 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 4359 | break; |
| 4360 | case Token::MUL: |
| 4361 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 4362 | break; |
| 4363 | case Token::DIV: |
| 4364 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 4365 | break; |
| 4366 | case Token::MOD: |
| 4367 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 4368 | break; |
| 4369 | case Token::BIT_OR: |
| 4370 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 4371 | break; |
| 4372 | case Token::BIT_AND: |
| 4373 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 4374 | break; |
| 4375 | case Token::BIT_XOR: |
| 4376 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 4377 | break; |
| 4378 | case Token::SAR: |
| 4379 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 4380 | break; |
| 4381 | case Token::SHL: |
| 4382 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 4383 | break; |
| 4384 | case Token::SHR: |
| 4385 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 4386 | break; |
| 4387 | default: |
| 4388 | UNREACHABLE(); |
| 4389 | } |
| 4390 | } |
| 4391 | |
| 4392 | |
| 4393 | void FloatingPointHelper::AllocateHeapNumber(MacroAssembler* masm, |
| 4394 | Label* need_gc, |
| 4395 | Register scratch1, |
| 4396 | Register scratch2) { |
| 4397 | ExternalReference allocation_top = |
| 4398 | ExternalReference::new_space_allocation_top_address(); |
| 4399 | ExternalReference allocation_limit = |
| 4400 | ExternalReference::new_space_allocation_limit_address(); |
| 4401 | __ mov(Operand(scratch1), Immediate(allocation_top)); |
| 4402 | __ mov(eax, Operand(scratch1, 0)); |
| 4403 | __ lea(scratch2, Operand(eax, HeapNumber::kSize)); // scratch2: new top |
| 4404 | __ cmp(scratch2, Operand::StaticVariable(allocation_limit)); |
| 4405 | __ j(above, need_gc, not_taken); |
| 4406 | |
| 4407 | __ mov(Operand(scratch1, 0), scratch2); // store new top |
| 4408 | __ mov(Operand(eax, HeapObject::kMapOffset), |
| 4409 | Immediate(Factory::heap_number_map())); |
| 4410 | // Tag old top and use as result. |
| 4411 | __ add(Operand(eax), Immediate(kHeapObjectTag)); |
| 4412 | } |
| 4413 | |
| 4414 | |
| 4415 | void FloatingPointHelper::LoadFloatOperands(MacroAssembler* masm, |
| 4416 | Register scratch) { |
| 4417 | Label load_smi_1, load_smi_2, done_load_1, done; |
| 4418 | __ mov(scratch, Operand(esp, 2 * kPointerSize)); |
| 4419 | __ test(scratch, Immediate(kSmiTagMask)); |
| 4420 | __ j(zero, &load_smi_1, not_taken); |
| 4421 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 4422 | __ bind(&done_load_1); |
| 4423 | |
| 4424 | __ mov(scratch, Operand(esp, 1 * kPointerSize)); |
| 4425 | __ test(scratch, Immediate(kSmiTagMask)); |
| 4426 | __ j(zero, &load_smi_2, not_taken); |
| 4427 | __ fld_d(FieldOperand(scratch, HeapNumber::kValueOffset)); |
| 4428 | __ jmp(&done); |
| 4429 | |
| 4430 | __ bind(&load_smi_1); |
| 4431 | __ sar(scratch, kSmiTagSize); |
| 4432 | __ push(scratch); |
| 4433 | __ fild_s(Operand(esp, 0)); |
| 4434 | __ pop(scratch); |
| 4435 | __ jmp(&done_load_1); |
| 4436 | |
| 4437 | __ bind(&load_smi_2); |
| 4438 | __ sar(scratch, kSmiTagSize); |
| 4439 | __ push(scratch); |
| 4440 | __ fild_s(Operand(esp, 0)); |
| 4441 | __ pop(scratch); |
| 4442 | |
| 4443 | __ bind(&done); |
| 4444 | } |
| 4445 | |
| 4446 | |
| 4447 | void FloatingPointHelper::CheckFloatOperands(MacroAssembler* masm, |
| 4448 | Label* non_float, |
| 4449 | Register scratch) { |
| 4450 | Label test_other, done; |
| 4451 | // Test if both operands are floats or smi -> scratch=k_is_float; |
| 4452 | // Otherwise scratch = k_not_float. |
| 4453 | __ test(edx, Immediate(kSmiTagMask)); |
| 4454 | __ j(zero, &test_other, not_taken); // argument in edx is OK |
| 4455 | __ mov(scratch, FieldOperand(edx, HeapObject::kMapOffset)); |
| 4456 | __ cmp(scratch, Factory::heap_number_map()); |
| 4457 | __ j(not_equal, non_float); // argument in edx is not a number -> NaN |
| 4458 | |
| 4459 | __ bind(&test_other); |
| 4460 | __ test(eax, Immediate(kSmiTagMask)); |
| 4461 | __ j(zero, &done); // argument in eax is OK |
| 4462 | __ mov(scratch, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4463 | __ cmp(scratch, Factory::heap_number_map()); |
| 4464 | __ j(not_equal, non_float); // argument in eax is not a number -> NaN |
| 4465 | |
| 4466 | // Fall-through: Both operands are numbers. |
| 4467 | __ bind(&done); |
| 4468 | } |
| 4469 | |
| 4470 | |
| 4471 | void UnarySubStub::Generate(MacroAssembler* masm) { |
| 4472 | Label undo; |
| 4473 | Label slow; |
| 4474 | Label done; |
| 4475 | Label try_float; |
| 4476 | |
| 4477 | // Check whether the value is a smi. |
| 4478 | __ test(eax, Immediate(kSmiTagMask)); |
| 4479 | __ j(not_zero, &try_float, not_taken); |
| 4480 | |
| 4481 | // Enter runtime system if the value of the expression is zero |
| 4482 | // to make sure that we switch between 0 and -0. |
| 4483 | __ test(eax, Operand(eax)); |
| 4484 | __ j(zero, &slow, not_taken); |
| 4485 | |
| 4486 | // The value of the expression is a smi that is not zero. Try |
| 4487 | // optimistic subtraction '0 - value'. |
| 4488 | __ mov(edx, Operand(eax)); |
| 4489 | __ Set(eax, Immediate(0)); |
| 4490 | __ sub(eax, Operand(edx)); |
| 4491 | __ j(overflow, &undo, not_taken); |
| 4492 | |
| 4493 | // If result is a smi we are done. |
| 4494 | __ test(eax, Immediate(kSmiTagMask)); |
| 4495 | __ j(zero, &done, taken); |
| 4496 | |
| 4497 | // Restore eax and enter runtime system. |
| 4498 | __ bind(&undo); |
| 4499 | __ mov(eax, Operand(edx)); |
| 4500 | |
| 4501 | // Enter runtime system. |
| 4502 | __ bind(&slow); |
| 4503 | __ pop(ecx); // pop return address |
| 4504 | __ push(eax); |
| 4505 | __ push(ecx); // push return address |
| 4506 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 4507 | |
| 4508 | // Try floating point case. |
| 4509 | __ bind(&try_float); |
| 4510 | __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4511 | __ cmp(edx, Factory::heap_number_map()); |
| 4512 | __ j(not_equal, &slow); |
| 4513 | __ mov(edx, Operand(eax)); |
| 4514 | // edx: operand |
| 4515 | FloatingPointHelper::AllocateHeapNumber(masm, &undo, ebx, ecx); |
| 4516 | // eax: allocated 'empty' number |
| 4517 | __ fld_d(FieldOperand(edx, HeapNumber::kValueOffset)); |
| 4518 | __ fchs(); |
| 4519 | __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset)); |
| 4520 | |
| 4521 | __ bind(&done); |
| 4522 | |
| 4523 | __ StubReturn(1); |
| 4524 | } |
| 4525 | |
| 4526 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4527 | void ArgumentsAccessStub::GenerateReadLength(MacroAssembler* masm) { |
| 4528 | // Check if the calling frame is an arguments adaptor frame. |
| 4529 | Label adaptor; |
| 4530 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 4531 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 4532 | __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL); |
| 4533 | __ j(equal, &adaptor); |
| 4534 | |
| 4535 | // Nothing to do: The formal number of parameters has already been |
| 4536 | // passed in register eax by calling function. Just return it. |
| 4537 | __ ret(0); |
| 4538 | |
| 4539 | // Arguments adaptor case: Read the arguments length from the |
| 4540 | // adaptor frame and return it. |
| 4541 | __ bind(&adaptor); |
| 4542 | __ mov(eax, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4543 | __ ret(0); |
| 4544 | } |
| 4545 | |
| 4546 | |
| 4547 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 4548 | // The displacement is used for skipping the frame pointer on the |
| 4549 | // stack. It is the offset of the last parameter (if any) relative |
| 4550 | // to the frame pointer. |
| 4551 | static const int kDisplacement = 1 * kPointerSize; |
| 4552 | |
| 4553 | // Check that the key is a smi. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4554 | Label slow; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4555 | __ mov(ebx, Operand(esp, 1 * kPointerSize)); // skip return address |
| 4556 | __ test(ebx, Immediate(kSmiTagMask)); |
| 4557 | __ j(not_zero, &slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4558 | |
| 4559 | // Check if the calling frame is an arguments adaptor frame. |
| 4560 | Label adaptor; |
| 4561 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 4562 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 4563 | __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4564 | __ j(equal, &adaptor); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4565 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4566 | // Check index against formal parameters count limit passed in |
| 4567 | // through register eax. Use unsigned comparison to get negative |
| 4568 | // check for free. |
| 4569 | __ cmp(ebx, Operand(eax)); |
| 4570 | __ j(above_equal, &slow, not_taken); |
| 4571 | |
| 4572 | // Read the argument from the stack and return it. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4573 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); // shifting code depends on this |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4574 | __ lea(edx, Operand(ebp, eax, times_2, 0)); |
| 4575 | __ neg(ebx); |
| 4576 | __ mov(eax, Operand(edx, ebx, times_2, kDisplacement)); |
| 4577 | __ ret(0); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4578 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4579 | // Arguments adaptor case: Check index against actual arguments |
| 4580 | // limit found in the arguments adaptor frame. Use unsigned |
| 4581 | // comparison to get negative check for free. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4582 | __ bind(&adaptor); |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4583 | __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4584 | __ cmp(ebx, Operand(ecx)); |
| 4585 | __ j(above_equal, &slow, not_taken); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4586 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4587 | // Read the argument from the stack and return it. |
| 4588 | ASSERT(kSmiTagSize == 1 && kSmiTag == 0); // shifting code depends on this |
| 4589 | __ lea(edx, Operand(edx, ecx, times_2, 0)); |
| 4590 | __ neg(ebx); |
| 4591 | __ mov(eax, Operand(edx, ebx, times_2, kDisplacement)); |
| 4592 | __ ret(0); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4593 | |
| 4594 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 4595 | // by calling the runtime system. |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4596 | __ bind(&slow); |
| 4597 | __ TailCallRuntime(ExternalReference(Runtime::kGetArgumentsProperty), 1); |
| 4598 | } |
| 4599 | |
| 4600 | |
| 4601 | void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) { |
| 4602 | // The displacement is used for skipping the return address and the |
| 4603 | // frame pointer on the stack. It is the offset of the last |
| 4604 | // parameter (if any) relative to the frame pointer. |
| 4605 | static const int kDisplacement = 2 * kPointerSize; |
| 4606 | |
| 4607 | // Check if the calling frame is an arguments adaptor frame. |
| 4608 | Label runtime; |
| 4609 | __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 4610 | __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset)); |
| 4611 | __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL); |
| 4612 | __ j(not_equal, &runtime); |
| 4613 | |
| 4614 | // Patch the arguments.length and the parameters pointer. |
| 4615 | __ mov(ecx, Operand(edx, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4616 | __ mov(Operand(esp, 1 * kPointerSize), ecx); |
| 4617 | __ lea(edx, Operand(edx, ecx, times_2, kDisplacement)); |
| 4618 | __ mov(Operand(esp, 2 * kPointerSize), edx); |
| 4619 | |
| 4620 | // Do the runtime call to allocate the arguments object. |
| 4621 | __ bind(&runtime); |
| 4622 | __ TailCallRuntime(ExternalReference(Runtime::kNewArgumentsFast), 3); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4623 | } |
| 4624 | |
| 4625 | |
| 4626 | void CompareStub::Generate(MacroAssembler* masm) { |
| 4627 | Label call_builtin, done; |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 4628 | |
| 4629 | // If we're doing a strict equality comparison, we generate code |
| 4630 | // to do fast comparison for objects and oddballs. Numbers and |
| 4631 | // strings still go through the usual slow-case code. |
| 4632 | if (strict_) { |
| 4633 | Label slow; |
| 4634 | __ test(eax, Immediate(kSmiTagMask)); |
| 4635 | __ j(zero, &slow); |
| 4636 | |
| 4637 | // Get the type of the first operand. |
| 4638 | __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); |
| 4639 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 4640 | |
| 4641 | // If the first object is an object, we do pointer comparison. |
| 4642 | ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| 4643 | Label non_object; |
| 4644 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 4645 | __ j(less, &non_object); |
| 4646 | __ sub(eax, Operand(edx)); |
| 4647 | __ ret(0); |
| 4648 | |
| 4649 | // Check for oddballs: true, false, null, undefined. |
| 4650 | __ bind(&non_object); |
| 4651 | __ cmp(ecx, ODDBALL_TYPE); |
| 4652 | __ j(not_equal, &slow); |
| 4653 | |
| 4654 | // If the oddball isn't undefined, we do pointer comparison. For |
| 4655 | // the undefined value, we have to be careful and check for |
| 4656 | // 'undetectable' objects too. |
| 4657 | Label undefined; |
| 4658 | __ cmp(Operand(eax), Immediate(Factory::undefined_value())); |
| 4659 | __ j(equal, &undefined); |
| 4660 | __ sub(eax, Operand(edx)); |
| 4661 | __ ret(0); |
| 4662 | |
| 4663 | // Undefined case: If the other operand isn't undefined too, we |
| 4664 | // have to check if it's 'undetectable'. |
| 4665 | Label check_undetectable; |
| 4666 | __ bind(&undefined); |
| 4667 | __ cmp(Operand(edx), Immediate(Factory::undefined_value())); |
| 4668 | __ j(not_equal, &check_undetectable); |
| 4669 | __ Set(eax, Immediate(0)); |
| 4670 | __ ret(0); |
| 4671 | |
| 4672 | // Check for undetectability of the other operand. |
| 4673 | Label not_strictly_equal; |
| 4674 | __ bind(&check_undetectable); |
| 4675 | __ test(edx, Immediate(kSmiTagMask)); |
| 4676 | __ j(zero, ¬_strictly_equal); |
| 4677 | __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset)); |
| 4678 | __ movzx_b(ecx, FieldOperand(ecx, Map::kBitFieldOffset)); |
| 4679 | __ and_(ecx, 1 << Map::kIsUndetectable); |
| 4680 | __ cmp(ecx, 1 << Map::kIsUndetectable); |
| 4681 | __ j(not_equal, ¬_strictly_equal); |
| 4682 | __ Set(eax, Immediate(0)); |
| 4683 | __ ret(0); |
| 4684 | |
| 4685 | // No cigar: Objects aren't strictly equal. Register eax contains |
| 4686 | // a non-smi value so it can't be 0. Just return. |
| 4687 | ASSERT(kHeapObjectTag != 0); |
| 4688 | __ bind(¬_strictly_equal); |
| 4689 | __ ret(0); |
| 4690 | |
| 4691 | // Fall through to the general case. |
| 4692 | __ bind(&slow); |
| 4693 | } |
| 4694 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 4695 | // Save the return address (and get it off the stack). |
| 4696 | __ pop(ecx); |
| 4697 | |
| 4698 | // Push arguments. |
| 4699 | __ push(eax); |
| 4700 | __ push(edx); |
| 4701 | __ push(ecx); |
| 4702 | |
| 4703 | // Inlined floating point compare. |
| 4704 | // Call builtin if operands are not floating point or smi. |
| 4705 | FloatingPointHelper::CheckFloatOperands(masm, &call_builtin, ebx); |
| 4706 | FloatingPointHelper::LoadFloatOperands(masm, ecx); |
| 4707 | __ FCmp(); |
| 4708 | |
| 4709 | // Jump to builtin for NaN. |
| 4710 | __ j(parity_even, &call_builtin, not_taken); |
| 4711 | |
| 4712 | // TODO(1243847): Use cmov below once CpuFeatures are properly hooked up. |
| 4713 | Label below_lbl, above_lbl; |
| 4714 | // use edx, eax to convert unsigned to signed comparison |
| 4715 | __ j(below, &below_lbl, not_taken); |
| 4716 | __ j(above, &above_lbl, not_taken); |
| 4717 | |
| 4718 | __ xor_(eax, Operand(eax)); // equal |
| 4719 | __ ret(2 * kPointerSize); |
| 4720 | |
| 4721 | __ bind(&below_lbl); |
| 4722 | __ mov(eax, -1); |
| 4723 | __ ret(2 * kPointerSize); |
| 4724 | |
| 4725 | __ bind(&above_lbl); |
| 4726 | __ mov(eax, 1); |
| 4727 | __ ret(2 * kPointerSize); // eax, edx were pushed |
| 4728 | |
| 4729 | __ bind(&call_builtin); |
| 4730 | // must swap argument order |
| 4731 | __ pop(ecx); |
| 4732 | __ pop(edx); |
| 4733 | __ pop(eax); |
| 4734 | __ push(edx); |
| 4735 | __ push(eax); |
| 4736 | |
| 4737 | // Figure out which native to call and setup the arguments. |
| 4738 | Builtins::JavaScript builtin; |
| 4739 | if (cc_ == equal) { |
| 4740 | builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 4741 | } else { |
| 4742 | builtin = Builtins::COMPARE; |
| 4743 | int ncr; // NaN compare result |
| 4744 | if (cc_ == less || cc_ == less_equal) { |
| 4745 | ncr = GREATER; |
| 4746 | } else { |
| 4747 | ASSERT(cc_ == greater || cc_ == greater_equal); // remaining cases |
| 4748 | ncr = LESS; |
| 4749 | } |
| 4750 | __ push(Immediate(Smi::FromInt(ncr))); |
| 4751 | } |
| 4752 | |
| 4753 | // Restore return address on the stack. |
| 4754 | __ push(ecx); |
| 4755 | |
| 4756 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 4757 | // tagged as a small integer. |
| 4758 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 4759 | } |
| 4760 | |
| 4761 | |
| 4762 | void StackCheckStub::Generate(MacroAssembler* masm) { |
| 4763 | // Because builtins always remove the receiver from the stack, we |
| 4764 | // have to fake one to avoid underflowing the stack. The receiver |
| 4765 | // must be inserted below the return address on the stack so we |
| 4766 | // temporarily store that in a register. |
| 4767 | __ pop(eax); |
| 4768 | __ push(Immediate(Smi::FromInt(0))); |
| 4769 | __ push(eax); |
| 4770 | |
| 4771 | // Do tail-call to runtime routine. |
| 4772 | __ TailCallRuntime(ExternalReference(Runtime::kStackGuard), 1); |
| 4773 | } |
| 4774 | |
| 4775 | |
| 4776 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
| 4777 | Label slow; |
| 4778 | |
| 4779 | // Get the function to call from the stack. |
| 4780 | // +2 ~ receiver, return address |
| 4781 | __ mov(edi, Operand(esp, (argc_ + 2) * kPointerSize)); |
| 4782 | |
| 4783 | // Check that the function really is a JavaScript function. |
| 4784 | __ test(edi, Immediate(kSmiTagMask)); |
| 4785 | __ j(zero, &slow, not_taken); |
| 4786 | // Get the map. |
| 4787 | __ mov(ecx, FieldOperand(edi, HeapObject::kMapOffset)); |
| 4788 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 4789 | __ cmp(ecx, JS_FUNCTION_TYPE); |
| 4790 | __ j(not_equal, &slow, not_taken); |
| 4791 | |
| 4792 | // Fast-case: Just invoke the function. |
| 4793 | ParameterCount actual(argc_); |
| 4794 | __ InvokeFunction(edi, actual, JUMP_FUNCTION); |
| 4795 | |
| 4796 | // Slow-case: Non-function called. |
| 4797 | __ bind(&slow); |
| 4798 | __ Set(eax, Immediate(argc_)); |
| 4799 | __ Set(ebx, Immediate(0)); |
| 4800 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
| 4801 | Handle<Code> adaptor(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 4802 | __ jmp(adaptor, RelocInfo::CODE_TARGET); |
| 4803 | } |
| 4804 | |
| 4805 | |
| 4806 | void RevertToNumberStub::Generate(MacroAssembler* masm) { |
| 4807 | // Revert optimistic increment/decrement. |
| 4808 | if (is_increment_) { |
| 4809 | __ sub(Operand(eax), Immediate(Smi::FromInt(1))); |
| 4810 | } else { |
| 4811 | __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| 4812 | } |
| 4813 | |
| 4814 | __ pop(ecx); |
| 4815 | __ push(eax); |
| 4816 | __ push(ecx); |
| 4817 | __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION); |
| 4818 | // Code never returns due to JUMP_FUNCTION. |
| 4819 | } |
| 4820 | |
| 4821 | |
| 4822 | void CounterOpStub::Generate(MacroAssembler* masm) { |
| 4823 | // Store to the result on the stack (skip return address) before |
| 4824 | // performing the count operation. |
| 4825 | if (is_postfix_) { |
| 4826 | __ mov(Operand(esp, result_offset_ + kPointerSize), eax); |
| 4827 | } |
| 4828 | |
| 4829 | // Revert optimistic increment/decrement but only for prefix |
| 4830 | // counts. For postfix counts it has already been reverted before |
| 4831 | // the conversion to numbers. |
| 4832 | if (!is_postfix_) { |
| 4833 | if (is_increment_) { |
| 4834 | __ sub(Operand(eax), Immediate(Smi::FromInt(1))); |
| 4835 | } else { |
| 4836 | __ add(Operand(eax), Immediate(Smi::FromInt(1))); |
| 4837 | } |
| 4838 | } |
| 4839 | |
| 4840 | // Compute the new value by calling the right JavaScript native. |
| 4841 | __ pop(ecx); |
| 4842 | __ push(eax); |
| 4843 | __ push(ecx); |
| 4844 | Builtins::JavaScript builtin = is_increment_ ? Builtins::INC : Builtins::DEC; |
| 4845 | __ InvokeBuiltin(builtin, JUMP_FUNCTION); |
| 4846 | // Code never returns due to JUMP_FUNCTION. |
| 4847 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4848 | |
| 4849 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4850 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
| 4851 | ASSERT(StackHandlerConstants::kSize == 6 * kPointerSize); // adjust this code |
| 4852 | ExternalReference handler_address(Top::k_handler_address); |
| 4853 | __ mov(edx, Operand::StaticVariable(handler_address)); |
| 4854 | __ mov(ecx, Operand(edx, -1 * kPointerSize)); // get next in chain |
| 4855 | __ mov(Operand::StaticVariable(handler_address), ecx); |
| 4856 | __ mov(esp, Operand(edx)); |
| 4857 | __ pop(edi); |
| 4858 | __ pop(ebp); |
| 4859 | __ pop(edx); // remove code pointer |
| 4860 | __ pop(edx); // remove state |
| 4861 | |
| 4862 | // Before returning we restore the context from the frame pointer if not NULL. |
| 4863 | // The frame pointer is NULL in the exception handler of a JS entry frame. |
| 4864 | __ xor_(esi, Operand(esi)); // tentatively set context pointer to NULL |
| 4865 | Label skip; |
| 4866 | __ cmp(ebp, 0); |
| 4867 | __ j(equal, &skip, not_taken); |
| 4868 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4869 | __ bind(&skip); |
| 4870 | |
| 4871 | __ ret(0); |
| 4872 | } |
| 4873 | |
| 4874 | |
| 4875 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 4876 | Label* throw_normal_exception, |
| 4877 | Label* throw_out_of_memory_exception, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4878 | StackFrame::Type frame_type, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4879 | bool do_gc, |
| 4880 | bool always_allocate_scope) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4881 | // eax: result parameter for PerformGC, if any |
| 4882 | // ebx: pointer to C function (C callee-saved) |
| 4883 | // ebp: frame pointer (restored after C call) |
| 4884 | // esp: stack pointer (restored after C call) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 4885 | // edi: number of arguments including receiver (C callee-saved) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4886 | // esi: pointer to the first argument (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4887 | |
| 4888 | if (do_gc) { |
| 4889 | __ mov(Operand(esp, 0 * kPointerSize), eax); // Result. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4890 | __ call(FUNCTION_ADDR(Runtime::PerformGC), RelocInfo::RUNTIME_ENTRY); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4891 | } |
| 4892 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4893 | ExternalReference scope_depth = |
| 4894 | ExternalReference::heap_always_allocate_scope_depth(); |
| 4895 | if (always_allocate_scope) { |
| 4896 | __ inc(Operand::StaticVariable(scope_depth)); |
| 4897 | } |
| 4898 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4899 | // Call C function. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4900 | __ mov(Operand(esp, 0 * kPointerSize), edi); // argc. |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4901 | __ mov(Operand(esp, 1 * kPointerSize), esi); // argv. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4902 | __ call(Operand(ebx)); |
| 4903 | // Result is in eax or edx:eax - do not destroy these registers! |
| 4904 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 4905 | if (always_allocate_scope) { |
| 4906 | __ dec(Operand::StaticVariable(scope_depth)); |
| 4907 | } |
| 4908 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4909 | // Check for failure result. |
| 4910 | Label failure_returned; |
| 4911 | ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 4912 | __ lea(ecx, Operand(eax, 1)); |
| 4913 | // Lower 2 bits of ecx are 0 iff eax has failure tag. |
| 4914 | __ test(ecx, Immediate(kFailureTagMask)); |
| 4915 | __ j(zero, &failure_returned, not_taken); |
| 4916 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4917 | // Exit the JavaScript to C++ exit frame. |
| 4918 | __ LeaveExitFrame(frame_type); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4919 | __ ret(0); |
| 4920 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 4921 | // Handling of failure. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 4922 | __ bind(&failure_returned); |
| 4923 | |
| 4924 | Label retry; |
| 4925 | // If the returned exception is RETRY_AFTER_GC continue at retry label |
| 4926 | ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 4927 | __ test(eax, Immediate(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
| 4928 | __ j(zero, &retry, taken); |
| 4929 | |
| 4930 | Label continue_exception; |
| 4931 | // If the returned failure is EXCEPTION then promote Top::pending_exception(). |
| 4932 | __ cmp(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
| 4933 | __ j(not_equal, &continue_exception); |
| 4934 | |
| 4935 | // Retrieve the pending exception and clear the variable. |
| 4936 | ExternalReference pending_exception_address(Top::k_pending_exception_address); |
| 4937 | __ mov(eax, Operand::StaticVariable(pending_exception_address)); |
| 4938 | __ mov(edx, |
| 4939 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 4940 | __ mov(Operand::StaticVariable(pending_exception_address), edx); |
| 4941 | |
| 4942 | __ bind(&continue_exception); |
| 4943 | // Special handling of out of memory exception. |
| 4944 | __ cmp(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 4945 | __ j(equal, throw_out_of_memory_exception); |
| 4946 | |
| 4947 | // Handle normal exception. |
| 4948 | __ jmp(throw_normal_exception); |
| 4949 | |
| 4950 | // Retry. |
| 4951 | __ bind(&retry); |
| 4952 | } |
| 4953 | |
| 4954 | |
| 4955 | void CEntryStub::GenerateThrowOutOfMemory(MacroAssembler* masm) { |
| 4956 | // Fetch top stack handler. |
| 4957 | ExternalReference handler_address(Top::k_handler_address); |
| 4958 | __ mov(edx, Operand::StaticVariable(handler_address)); |
| 4959 | |
| 4960 | // Unwind the handlers until the ENTRY handler is found. |
| 4961 | Label loop, done; |
| 4962 | __ bind(&loop); |
| 4963 | // Load the type of the current stack handler. |
| 4964 | const int kStateOffset = StackHandlerConstants::kAddressDisplacement + |
| 4965 | StackHandlerConstants::kStateOffset; |
| 4966 | __ cmp(Operand(edx, kStateOffset), Immediate(StackHandler::ENTRY)); |
| 4967 | __ j(equal, &done); |
| 4968 | // Fetch the next handler in the list. |
| 4969 | const int kNextOffset = StackHandlerConstants::kAddressDisplacement + |
| 4970 | StackHandlerConstants::kNextOffset; |
| 4971 | __ mov(edx, Operand(edx, kNextOffset)); |
| 4972 | __ jmp(&loop); |
| 4973 | __ bind(&done); |
| 4974 | |
| 4975 | // Set the top handler address to next handler past the current ENTRY handler. |
| 4976 | __ mov(eax, Operand(edx, kNextOffset)); |
| 4977 | __ mov(Operand::StaticVariable(handler_address), eax); |
| 4978 | |
| 4979 | // Set external caught exception to false. |
| 4980 | __ mov(eax, false); |
| 4981 | ExternalReference external_caught(Top::k_external_caught_exception_address); |
| 4982 | __ mov(Operand::StaticVariable(external_caught), eax); |
| 4983 | |
| 4984 | // Set pending exception and eax to out of memory exception. |
| 4985 | __ mov(eax, reinterpret_cast<int32_t>(Failure::OutOfMemoryException())); |
| 4986 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 4987 | __ mov(Operand::StaticVariable(pending_exception), eax); |
| 4988 | |
| 4989 | // Restore the stack to the address of the ENTRY handler |
| 4990 | __ mov(esp, Operand(edx)); |
| 4991 | |
| 4992 | // Clear the context pointer; |
| 4993 | __ xor_(esi, Operand(esi)); |
| 4994 | |
| 4995 | // Restore registers from handler. |
| 4996 | __ pop(edi); // PP |
| 4997 | __ pop(ebp); // FP |
| 4998 | __ pop(edx); // Code |
| 4999 | __ pop(edx); // State |
| 5000 | |
| 5001 | __ ret(0); |
| 5002 | } |
| 5003 | |
| 5004 | |
| 5005 | void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5006 | // eax: number of arguments including receiver |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5007 | // ebx: pointer to C function (C callee-saved) |
| 5008 | // ebp: frame pointer (restored after C call) |
| 5009 | // esp: stack pointer (restored after C call) |
| 5010 | // esi: current context (C callee-saved) |
| 5011 | // edi: caller's parameter pointer pp (C callee-saved) |
| 5012 | |
| 5013 | // NOTE: Invocations of builtins may return failure objects |
| 5014 | // instead of a proper result. The builtin entry handles |
| 5015 | // this by performing a garbage collection and retrying the |
| 5016 | // builtin once. |
| 5017 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5018 | StackFrame::Type frame_type = is_debug_break ? |
| 5019 | StackFrame::EXIT_DEBUG : |
| 5020 | StackFrame::EXIT; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5021 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5022 | // Enter the exit frame that transitions from JavaScript to C++. |
| 5023 | __ EnterExitFrame(frame_type); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5024 | |
| 5025 | // eax: result parameter for PerformGC, if any (setup below) |
| 5026 | // ebx: pointer to builtin function (C callee-saved) |
| 5027 | // ebp: frame pointer (restored after C call) |
| 5028 | // esp: stack pointer (restored after C call) |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 5029 | // edi: number of arguments including receiver (C callee-saved) |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5030 | // esi: argv pointer (C callee-saved) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5031 | |
| 5032 | Label throw_out_of_memory_exception; |
| 5033 | Label throw_normal_exception; |
| 5034 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 5035 | // Call into the runtime system. Collect garbage before the call if |
| 5036 | // running with --gc-greedy set. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5037 | if (FLAG_gc_greedy) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 5038 | Failure* failure = Failure::RetryAfterGC(0); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5039 | __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure))); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5040 | } |
| 5041 | GenerateCore(masm, &throw_normal_exception, |
| 5042 | &throw_out_of_memory_exception, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5043 | frame_type, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 5044 | FLAG_gc_greedy, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5045 | false); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5046 | |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 5047 | // Do space-specific GC and retry runtime call. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5048 | GenerateCore(masm, |
| 5049 | &throw_normal_exception, |
| 5050 | &throw_out_of_memory_exception, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5051 | frame_type, |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 5052 | true, |
| 5053 | false); |
| 5054 | |
| 5055 | // Do full GC and retry runtime call one final time. |
| 5056 | Failure* failure = Failure::InternalError(); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5057 | __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure))); |
kasperl@chromium.org | 9bbf968 | 2008-10-30 11:53:07 +0000 | [diff] [blame] | 5058 | GenerateCore(masm, |
| 5059 | &throw_normal_exception, |
| 5060 | &throw_out_of_memory_exception, |
| 5061 | frame_type, |
| 5062 | true, |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 5063 | true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5064 | |
| 5065 | __ bind(&throw_out_of_memory_exception); |
| 5066 | GenerateThrowOutOfMemory(masm); |
| 5067 | // control flow for generated will not return. |
| 5068 | |
| 5069 | __ bind(&throw_normal_exception); |
| 5070 | GenerateThrowTOS(masm); |
| 5071 | } |
| 5072 | |
| 5073 | |
| 5074 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
| 5075 | Label invoke, exit; |
| 5076 | |
| 5077 | // Setup frame. |
| 5078 | __ push(ebp); |
| 5079 | __ mov(ebp, Operand(esp)); |
| 5080 | |
| 5081 | // Save callee-saved registers (C calling conventions). |
| 5082 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 5083 | // Push something that is not an arguments adaptor. |
| 5084 | __ push(Immediate(~ArgumentsAdaptorFrame::SENTINEL)); |
| 5085 | __ push(Immediate(Smi::FromInt(marker))); // @ function offset |
| 5086 | __ push(edi); |
| 5087 | __ push(esi); |
| 5088 | __ push(ebx); |
| 5089 | |
| 5090 | // Save copies of the top frame descriptor on the stack. |
| 5091 | ExternalReference c_entry_fp(Top::k_c_entry_fp_address); |
| 5092 | __ push(Operand::StaticVariable(c_entry_fp)); |
| 5093 | |
| 5094 | // Call a faked try-block that does the invoke. |
| 5095 | __ call(&invoke); |
| 5096 | |
| 5097 | // Caught exception: Store result (exception) in the pending |
| 5098 | // exception field in the JSEnv and return a failure sentinel. |
| 5099 | ExternalReference pending_exception(Top::k_pending_exception_address); |
| 5100 | __ mov(Operand::StaticVariable(pending_exception), eax); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5101 | __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5102 | __ jmp(&exit); |
| 5103 | |
| 5104 | // Invoke: Link this frame into the handler chain. |
| 5105 | __ bind(&invoke); |
| 5106 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 5107 | __ push(eax); // flush TOS |
| 5108 | |
| 5109 | // Clear any pending exceptions. |
| 5110 | __ mov(edx, |
| 5111 | Operand::StaticVariable(ExternalReference::the_hole_value_location())); |
| 5112 | __ mov(Operand::StaticVariable(pending_exception), edx); |
| 5113 | |
| 5114 | // Fake a receiver (NULL). |
| 5115 | __ push(Immediate(0)); // receiver |
| 5116 | |
| 5117 | // Invoke the function by calling through JS entry trampoline |
| 5118 | // builtin and pop the faked function when we return. Notice that we |
| 5119 | // cannot store a reference to the trampoline code directly in this |
| 5120 | // stub, because the builtin stubs may not have been generated yet. |
| 5121 | if (is_construct) { |
| 5122 | ExternalReference construct_entry(Builtins::JSConstructEntryTrampoline); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5123 | __ mov(edx, Immediate(construct_entry)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5124 | } else { |
| 5125 | ExternalReference entry(Builtins::JSEntryTrampoline); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 5126 | __ mov(edx, Immediate(entry)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5127 | } |
| 5128 | __ mov(edx, Operand(edx, 0)); // deref address |
| 5129 | __ lea(edx, FieldOperand(edx, Code::kHeaderSize)); |
| 5130 | __ call(Operand(edx)); |
| 5131 | |
| 5132 | // Unlink this frame from the handler chain. |
| 5133 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_handler_address))); |
| 5134 | // Pop next_sp. |
| 5135 | __ add(Operand(esp), Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 5136 | |
| 5137 | // Restore the top frame descriptor from the stack. |
| 5138 | __ bind(&exit); |
| 5139 | __ pop(Operand::StaticVariable(ExternalReference(Top::k_c_entry_fp_address))); |
| 5140 | |
| 5141 | // Restore callee-saved registers (C calling conventions). |
| 5142 | __ pop(ebx); |
| 5143 | __ pop(esi); |
| 5144 | __ pop(edi); |
| 5145 | __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers |
| 5146 | |
| 5147 | // Restore frame pointer and return. |
| 5148 | __ pop(ebp); |
| 5149 | __ ret(0); |
| 5150 | } |
| 5151 | |
| 5152 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5153 | void InstanceofStub::Generate(MacroAssembler* masm) { |
| 5154 | // Get the object - go slow case if it's a smi. |
| 5155 | Label slow; |
| 5156 | __ mov(eax, Operand(esp, 2 * kPointerSize)); // 2 ~ return address, function |
| 5157 | __ test(eax, Immediate(kSmiTagMask)); |
| 5158 | __ j(zero, &slow, not_taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5159 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5160 | // Check that the left hand is a JS object. |
| 5161 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); // ebx - object map |
| 5162 | __ movzx_b(ecx, FieldOperand(eax, Map::kInstanceTypeOffset)); // ecx - type |
| 5163 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 5164 | __ j(less, &slow, not_taken); |
| 5165 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| 5166 | __ j(greater, &slow, not_taken); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5167 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5168 | // Get the prototype of the function. |
| 5169 | __ mov(edx, Operand(esp, 1 * kPointerSize)); // 1 ~ return address |
| 5170 | __ TryGetFunctionPrototype(edx, ebx, ecx, &slow); |
| 5171 | |
| 5172 | // Check that the function prototype is a JS object. |
| 5173 | __ mov(ecx, FieldOperand(ebx, HeapObject::kMapOffset)); |
| 5174 | __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset)); |
| 5175 | __ cmp(ecx, FIRST_JS_OBJECT_TYPE); |
| 5176 | __ j(less, &slow, not_taken); |
| 5177 | __ cmp(ecx, LAST_JS_OBJECT_TYPE); |
| 5178 | __ j(greater, &slow, not_taken); |
| 5179 | |
| 5180 | // Register mapping: eax is object map and ebx is function prototype. |
| 5181 | __ mov(ecx, FieldOperand(eax, Map::kPrototypeOffset)); |
| 5182 | |
| 5183 | // Loop through the prototype chain looking for the function prototype. |
| 5184 | Label loop, is_instance, is_not_instance; |
| 5185 | __ bind(&loop); |
| 5186 | __ cmp(ecx, Operand(ebx)); |
| 5187 | __ j(equal, &is_instance); |
| 5188 | __ cmp(Operand(ecx), Immediate(Factory::null_value())); |
| 5189 | __ j(equal, &is_not_instance); |
| 5190 | __ mov(ecx, FieldOperand(ecx, HeapObject::kMapOffset)); |
| 5191 | __ mov(ecx, FieldOperand(ecx, Map::kPrototypeOffset)); |
| 5192 | __ jmp(&loop); |
| 5193 | |
| 5194 | __ bind(&is_instance); |
| 5195 | __ Set(eax, Immediate(0)); |
| 5196 | __ ret(2 * kPointerSize); |
| 5197 | |
| 5198 | __ bind(&is_not_instance); |
| 5199 | __ Set(eax, Immediate(Smi::FromInt(1))); |
| 5200 | __ ret(2 * kPointerSize); |
| 5201 | |
| 5202 | // Slow-case: Go through the JavaScript implementation. |
| 5203 | __ bind(&slow); |
| 5204 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5205 | } |
| 5206 | |
| 5207 | |
ager@chromium.org | 7c537e2 | 2008-10-16 08:43:32 +0000 | [diff] [blame] | 5208 | #undef __ |
| 5209 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 5210 | } } // namespace v8::internal |