Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #if V8_TARGET_ARCH_X87 |
| 6 | |
| 7 | #include "src/crankshaft/x87/lithium-codegen-x87.h" |
| 8 | |
| 9 | #include "src/base/bits.h" |
| 10 | #include "src/code-factory.h" |
| 11 | #include "src/code-stubs.h" |
| 12 | #include "src/codegen.h" |
| 13 | #include "src/crankshaft/hydrogen-osr.h" |
| 14 | #include "src/deoptimizer.h" |
| 15 | #include "src/ic/ic.h" |
| 16 | #include "src/ic/stub-cache.h" |
| 17 | #include "src/profiler/cpu-profiler.h" |
| 18 | #include "src/x87/frames-x87.h" |
| 19 | |
| 20 | namespace v8 { |
| 21 | namespace internal { |
| 22 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 23 | // When invoking builtins, we need to record the safepoint in the middle of |
| 24 | // the invoke instruction sequence generated by the macro assembler. |
| 25 | class SafepointGenerator final : public CallWrapper { |
| 26 | public: |
| 27 | SafepointGenerator(LCodeGen* codegen, |
| 28 | LPointerMap* pointers, |
| 29 | Safepoint::DeoptMode mode) |
| 30 | : codegen_(codegen), |
| 31 | pointers_(pointers), |
| 32 | deopt_mode_(mode) {} |
| 33 | virtual ~SafepointGenerator() {} |
| 34 | |
| 35 | void BeforeCall(int call_size) const override {} |
| 36 | |
| 37 | void AfterCall() const override { |
| 38 | codegen_->RecordSafepoint(pointers_, deopt_mode_); |
| 39 | } |
| 40 | |
| 41 | private: |
| 42 | LCodeGen* codegen_; |
| 43 | LPointerMap* pointers_; |
| 44 | Safepoint::DeoptMode deopt_mode_; |
| 45 | }; |
| 46 | |
| 47 | |
| 48 | #define __ masm()-> |
| 49 | |
| 50 | bool LCodeGen::GenerateCode() { |
| 51 | LPhase phase("Z_Code generation", chunk()); |
| 52 | DCHECK(is_unused()); |
| 53 | status_ = GENERATING; |
| 54 | |
| 55 | // Open a frame scope to indicate that there is a frame on the stack. The |
| 56 | // MANUAL indicates that the scope shouldn't actually generate code to set up |
| 57 | // the frame (that is done in GeneratePrologue). |
| 58 | FrameScope frame_scope(masm_, StackFrame::MANUAL); |
| 59 | |
| 60 | support_aligned_spilled_doubles_ = info()->IsOptimizing(); |
| 61 | |
| 62 | dynamic_frame_alignment_ = info()->IsOptimizing() && |
| 63 | ((chunk()->num_double_slots() > 2 && |
| 64 | !chunk()->graph()->is_recursive()) || |
| 65 | !info()->osr_ast_id().IsNone()); |
| 66 | |
| 67 | return GeneratePrologue() && |
| 68 | GenerateBody() && |
| 69 | GenerateDeferredCode() && |
| 70 | GenerateJumpTable() && |
| 71 | GenerateSafepointTable(); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | void LCodeGen::FinishCode(Handle<Code> code) { |
| 76 | DCHECK(is_done()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 77 | code->set_stack_slots(GetTotalFrameSlotCount()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 78 | code->set_safepoint_table_offset(safepoints_.GetCodeOffset()); |
| 79 | PopulateDeoptimizationData(code); |
| 80 | if (info()->ShouldEnsureSpaceForLazyDeopt()) { |
| 81 | Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | |
| 86 | #ifdef _MSC_VER |
| 87 | void LCodeGen::MakeSureStackPagesMapped(int offset) { |
| 88 | const int kPageSize = 4 * KB; |
| 89 | for (offset -= kPageSize; offset > 0; offset -= kPageSize) { |
| 90 | __ mov(Operand(esp, offset), eax); |
| 91 | } |
| 92 | } |
| 93 | #endif |
| 94 | |
| 95 | |
| 96 | bool LCodeGen::GeneratePrologue() { |
| 97 | DCHECK(is_generating()); |
| 98 | |
| 99 | if (info()->IsOptimizing()) { |
| 100 | ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| 101 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 102 | if (support_aligned_spilled_doubles_ && dynamic_frame_alignment_) { |
| 103 | // Move state of dynamic frame alignment into edx. |
| 104 | __ Move(edx, Immediate(kNoAlignmentPadding)); |
| 105 | |
| 106 | Label do_not_pad, align_loop; |
| 107 | STATIC_ASSERT(kDoubleSize == 2 * kPointerSize); |
| 108 | // Align esp + 4 to a multiple of 2 * kPointerSize. |
| 109 | __ test(esp, Immediate(kPointerSize)); |
| 110 | __ j(not_zero, &do_not_pad, Label::kNear); |
| 111 | __ push(Immediate(0)); |
| 112 | __ mov(ebx, esp); |
| 113 | __ mov(edx, Immediate(kAlignmentPaddingPushed)); |
| 114 | // Copy arguments, receiver, and return address. |
| 115 | __ mov(ecx, Immediate(scope()->num_parameters() + 2)); |
| 116 | |
| 117 | __ bind(&align_loop); |
| 118 | __ mov(eax, Operand(ebx, 1 * kPointerSize)); |
| 119 | __ mov(Operand(ebx, 0), eax); |
| 120 | __ add(Operand(ebx), Immediate(kPointerSize)); |
| 121 | __ dec(ecx); |
| 122 | __ j(not_zero, &align_loop, Label::kNear); |
| 123 | __ mov(Operand(ebx, 0), Immediate(kAlignmentZapValue)); |
| 124 | __ bind(&do_not_pad); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | info()->set_prologue_offset(masm_->pc_offset()); |
| 129 | if (NeedsEagerFrame()) { |
| 130 | DCHECK(!frame_is_built_); |
| 131 | frame_is_built_ = true; |
| 132 | if (info()->IsStub()) { |
| 133 | __ StubPrologue(); |
| 134 | } else { |
| 135 | __ Prologue(info()->GeneratePreagedPrologue()); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | if (info()->IsOptimizing() && |
| 140 | dynamic_frame_alignment_ && |
| 141 | FLAG_debug_code) { |
| 142 | __ test(esp, Immediate(kPointerSize)); |
| 143 | __ Assert(zero, kFrameIsExpectedToBeAligned); |
| 144 | } |
| 145 | |
| 146 | // Reserve space for the stack slots needed by the code. |
| 147 | int slots = GetStackSlotCount(); |
| 148 | DCHECK(slots != 0 || !info()->IsOptimizing()); |
| 149 | if (slots > 0) { |
| 150 | if (slots == 1) { |
| 151 | if (dynamic_frame_alignment_) { |
| 152 | __ push(edx); |
| 153 | } else { |
| 154 | __ push(Immediate(kNoAlignmentPadding)); |
| 155 | } |
| 156 | } else { |
| 157 | if (FLAG_debug_code) { |
| 158 | __ sub(Operand(esp), Immediate(slots * kPointerSize)); |
| 159 | #ifdef _MSC_VER |
| 160 | MakeSureStackPagesMapped(slots * kPointerSize); |
| 161 | #endif |
| 162 | __ push(eax); |
| 163 | __ mov(Operand(eax), Immediate(slots)); |
| 164 | Label loop; |
| 165 | __ bind(&loop); |
| 166 | __ mov(MemOperand(esp, eax, times_4, 0), |
| 167 | Immediate(kSlotsZapValue)); |
| 168 | __ dec(eax); |
| 169 | __ j(not_zero, &loop); |
| 170 | __ pop(eax); |
| 171 | } else { |
| 172 | __ sub(Operand(esp), Immediate(slots * kPointerSize)); |
| 173 | #ifdef _MSC_VER |
| 174 | MakeSureStackPagesMapped(slots * kPointerSize); |
| 175 | #endif |
| 176 | } |
| 177 | |
| 178 | if (support_aligned_spilled_doubles_) { |
| 179 | Comment(";;; Store dynamic frame alignment tag for spilled doubles"); |
| 180 | // Store dynamic frame alignment state in the first local. |
| 181 | int offset = JavaScriptFrameConstants::kDynamicAlignmentStateOffset; |
| 182 | if (dynamic_frame_alignment_) { |
| 183 | __ mov(Operand(ebp, offset), edx); |
| 184 | } else { |
| 185 | __ mov(Operand(ebp, offset), Immediate(kNoAlignmentPadding)); |
| 186 | } |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | // Initailize FPU state. |
| 192 | __ fninit(); |
| 193 | |
| 194 | return !is_aborted(); |
| 195 | } |
| 196 | |
| 197 | |
| 198 | void LCodeGen::DoPrologue(LPrologue* instr) { |
| 199 | Comment(";;; Prologue begin"); |
| 200 | |
| 201 | // Possibly allocate a local context. |
| 202 | if (info_->num_heap_slots() > 0) { |
| 203 | Comment(";;; Allocate local context"); |
| 204 | bool need_write_barrier = true; |
| 205 | // Argument to NewContext is the function, which is still in edi. |
| 206 | int slots = info_->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| 207 | Safepoint::DeoptMode deopt_mode = Safepoint::kNoLazyDeopt; |
| 208 | if (info()->scope()->is_script_scope()) { |
| 209 | __ push(edi); |
| 210 | __ Push(info()->scope()->GetScopeInfo(info()->isolate())); |
| 211 | __ CallRuntime(Runtime::kNewScriptContext); |
| 212 | deopt_mode = Safepoint::kLazyDeopt; |
| 213 | } else if (slots <= FastNewContextStub::kMaximumSlots) { |
| 214 | FastNewContextStub stub(isolate(), slots); |
| 215 | __ CallStub(&stub); |
| 216 | // Result of FastNewContextStub is always in new space. |
| 217 | need_write_barrier = false; |
| 218 | } else { |
| 219 | __ push(edi); |
| 220 | __ CallRuntime(Runtime::kNewFunctionContext); |
| 221 | } |
| 222 | RecordSafepoint(deopt_mode); |
| 223 | |
| 224 | // Context is returned in eax. It replaces the context passed to us. |
| 225 | // It's saved in the stack and kept live in esi. |
| 226 | __ mov(esi, eax); |
| 227 | __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax); |
| 228 | |
| 229 | // Copy parameters into context if necessary. |
| 230 | int num_parameters = scope()->num_parameters(); |
| 231 | int first_parameter = scope()->has_this_declaration() ? -1 : 0; |
| 232 | for (int i = first_parameter; i < num_parameters; i++) { |
| 233 | Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i); |
| 234 | if (var->IsContextSlot()) { |
| 235 | int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| 236 | (num_parameters - 1 - i) * kPointerSize; |
| 237 | // Load parameter from stack. |
| 238 | __ mov(eax, Operand(ebp, parameter_offset)); |
| 239 | // Store it in the context. |
| 240 | int context_offset = Context::SlotOffset(var->index()); |
| 241 | __ mov(Operand(esi, context_offset), eax); |
| 242 | // Update the write barrier. This clobbers eax and ebx. |
| 243 | if (need_write_barrier) { |
| 244 | __ RecordWriteContextSlot(esi, context_offset, eax, ebx, |
| 245 | kDontSaveFPRegs); |
| 246 | } else if (FLAG_debug_code) { |
| 247 | Label done; |
| 248 | __ JumpIfInNewSpace(esi, eax, &done, Label::kNear); |
| 249 | __ Abort(kExpectedNewSpaceObject); |
| 250 | __ bind(&done); |
| 251 | } |
| 252 | } |
| 253 | } |
| 254 | Comment(";;; End allocate local context"); |
| 255 | } |
| 256 | |
| 257 | Comment(";;; Prologue end"); |
| 258 | } |
| 259 | |
| 260 | |
| 261 | void LCodeGen::GenerateOsrPrologue() { |
| 262 | // Generate the OSR entry prologue at the first unknown OSR value, or if there |
| 263 | // are none, at the OSR entrypoint instruction. |
| 264 | if (osr_pc_offset_ >= 0) return; |
| 265 | |
| 266 | osr_pc_offset_ = masm()->pc_offset(); |
| 267 | |
| 268 | // Move state of dynamic frame alignment into edx. |
| 269 | __ Move(edx, Immediate(kNoAlignmentPadding)); |
| 270 | |
| 271 | if (support_aligned_spilled_doubles_ && dynamic_frame_alignment_) { |
| 272 | Label do_not_pad, align_loop; |
| 273 | // Align ebp + 4 to a multiple of 2 * kPointerSize. |
| 274 | __ test(ebp, Immediate(kPointerSize)); |
| 275 | __ j(zero, &do_not_pad, Label::kNear); |
| 276 | __ push(Immediate(0)); |
| 277 | __ mov(ebx, esp); |
| 278 | __ mov(edx, Immediate(kAlignmentPaddingPushed)); |
| 279 | |
| 280 | // Move all parts of the frame over one word. The frame consists of: |
| 281 | // unoptimized frame slots, alignment state, context, frame pointer, return |
| 282 | // address, receiver, and the arguments. |
| 283 | __ mov(ecx, Immediate(scope()->num_parameters() + |
| 284 | 5 + graph()->osr()->UnoptimizedFrameSlots())); |
| 285 | |
| 286 | __ bind(&align_loop); |
| 287 | __ mov(eax, Operand(ebx, 1 * kPointerSize)); |
| 288 | __ mov(Operand(ebx, 0), eax); |
| 289 | __ add(Operand(ebx), Immediate(kPointerSize)); |
| 290 | __ dec(ecx); |
| 291 | __ j(not_zero, &align_loop, Label::kNear); |
| 292 | __ mov(Operand(ebx, 0), Immediate(kAlignmentZapValue)); |
| 293 | __ sub(Operand(ebp), Immediate(kPointerSize)); |
| 294 | __ bind(&do_not_pad); |
| 295 | } |
| 296 | |
| 297 | // Save the first local, which is overwritten by the alignment state. |
| 298 | Operand alignment_loc = MemOperand(ebp, -3 * kPointerSize); |
| 299 | __ push(alignment_loc); |
| 300 | |
| 301 | // Set the dynamic frame alignment state. |
| 302 | __ mov(alignment_loc, edx); |
| 303 | |
| 304 | // Adjust the frame size, subsuming the unoptimized frame into the |
| 305 | // optimized frame. |
| 306 | int slots = GetStackSlotCount() - graph()->osr()->UnoptimizedFrameSlots(); |
| 307 | DCHECK(slots >= 1); |
| 308 | __ sub(esp, Immediate((slots - 1) * kPointerSize)); |
| 309 | |
| 310 | // Initailize FPU state. |
| 311 | __ fninit(); |
| 312 | } |
| 313 | |
| 314 | |
| 315 | void LCodeGen::GenerateBodyInstructionPre(LInstruction* instr) { |
| 316 | if (instr->IsCall()) { |
| 317 | EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); |
| 318 | } |
| 319 | if (!instr->IsLazyBailout() && !instr->IsGap()) { |
| 320 | safepoints_.BumpLastLazySafepointIndex(); |
| 321 | } |
| 322 | FlushX87StackIfNecessary(instr); |
| 323 | } |
| 324 | |
| 325 | |
| 326 | void LCodeGen::GenerateBodyInstructionPost(LInstruction* instr) { |
| 327 | // When return from function call, FPU should be initialized again. |
| 328 | if (instr->IsCall() && instr->ClobbersDoubleRegisters(isolate())) { |
| 329 | bool double_result = instr->HasDoubleRegisterResult(); |
| 330 | if (double_result) { |
| 331 | __ lea(esp, Operand(esp, -kDoubleSize)); |
| 332 | __ fstp_d(Operand(esp, 0)); |
| 333 | } |
| 334 | __ fninit(); |
| 335 | if (double_result) { |
| 336 | __ fld_d(Operand(esp, 0)); |
| 337 | __ lea(esp, Operand(esp, kDoubleSize)); |
| 338 | } |
| 339 | } |
| 340 | if (instr->IsGoto()) { |
| 341 | x87_stack_.LeavingBlock(current_block_, LGoto::cast(instr), this); |
| 342 | } else if (FLAG_debug_code && FLAG_enable_slow_asserts && |
| 343 | !instr->IsGap() && !instr->IsReturn()) { |
| 344 | if (instr->ClobbersDoubleRegisters(isolate())) { |
| 345 | if (instr->HasDoubleRegisterResult()) { |
| 346 | DCHECK_EQ(1, x87_stack_.depth()); |
| 347 | } else { |
| 348 | DCHECK_EQ(0, x87_stack_.depth()); |
| 349 | } |
| 350 | } |
| 351 | __ VerifyX87StackDepth(x87_stack_.depth()); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | |
| 356 | bool LCodeGen::GenerateJumpTable() { |
| 357 | if (!jump_table_.length()) return !is_aborted(); |
| 358 | |
| 359 | Label needs_frame; |
| 360 | Comment(";;; -------------------- Jump table --------------------"); |
| 361 | |
| 362 | for (int i = 0; i < jump_table_.length(); i++) { |
| 363 | Deoptimizer::JumpTableEntry* table_entry = &jump_table_[i]; |
| 364 | __ bind(&table_entry->label); |
| 365 | Address entry = table_entry->address; |
| 366 | DeoptComment(table_entry->deopt_info); |
| 367 | if (table_entry->needs_frame) { |
| 368 | DCHECK(!info()->saves_caller_doubles()); |
| 369 | __ push(Immediate(ExternalReference::ForDeoptEntry(entry))); |
| 370 | __ call(&needs_frame); |
| 371 | } else { |
| 372 | __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| 373 | } |
| 374 | info()->LogDeoptCallPosition(masm()->pc_offset(), |
| 375 | table_entry->deopt_info.inlining_id); |
| 376 | } |
| 377 | if (needs_frame.is_linked()) { |
| 378 | __ bind(&needs_frame); |
| 379 | |
| 380 | /* stack layout |
| 381 | 4: entry address |
| 382 | 3: return address <-- esp |
| 383 | 2: garbage |
| 384 | 1: garbage |
| 385 | 0: garbage |
| 386 | */ |
| 387 | __ sub(esp, Immediate(kPointerSize)); // Reserve space for stub marker. |
| 388 | __ push(MemOperand(esp, kPointerSize)); // Copy return address. |
| 389 | __ push(MemOperand(esp, 3 * kPointerSize)); // Copy entry address. |
| 390 | |
| 391 | /* stack layout |
| 392 | 4: entry address |
| 393 | 3: return address |
| 394 | 2: garbage |
| 395 | 1: return address |
| 396 | 0: entry address <-- esp |
| 397 | */ |
| 398 | __ mov(MemOperand(esp, 4 * kPointerSize), ebp); // Save ebp. |
| 399 | |
| 400 | // Copy context. |
| 401 | __ mov(ebp, MemOperand(ebp, StandardFrameConstants::kContextOffset)); |
| 402 | __ mov(MemOperand(esp, 3 * kPointerSize), ebp); |
| 403 | // Fill ebp with the right stack frame address. |
| 404 | __ lea(ebp, MemOperand(esp, 4 * kPointerSize)); |
| 405 | |
| 406 | // This variant of deopt can only be used with stubs. Since we don't |
| 407 | // have a function pointer to install in the stack frame that we're |
| 408 | // building, install a special marker there instead. |
| 409 | DCHECK(info()->IsStub()); |
| 410 | __ mov(MemOperand(esp, 2 * kPointerSize), |
| 411 | Immediate(Smi::FromInt(StackFrame::STUB))); |
| 412 | |
| 413 | /* stack layout |
| 414 | 4: old ebp |
| 415 | 3: context pointer |
| 416 | 2: stub marker |
| 417 | 1: return address |
| 418 | 0: entry address <-- esp |
| 419 | */ |
| 420 | __ ret(0); // Call the continuation without clobbering registers. |
| 421 | } |
| 422 | return !is_aborted(); |
| 423 | } |
| 424 | |
| 425 | |
| 426 | bool LCodeGen::GenerateDeferredCode() { |
| 427 | DCHECK(is_generating()); |
| 428 | if (deferred_.length() > 0) { |
| 429 | for (int i = 0; !is_aborted() && i < deferred_.length(); i++) { |
| 430 | LDeferredCode* code = deferred_[i]; |
| 431 | X87Stack copy(code->x87_stack()); |
| 432 | x87_stack_ = copy; |
| 433 | |
| 434 | HValue* value = |
| 435 | instructions_->at(code->instruction_index())->hydrogen_value(); |
| 436 | RecordAndWritePosition( |
| 437 | chunk()->graph()->SourcePositionToScriptPosition(value->position())); |
| 438 | |
| 439 | Comment(";;; <@%d,#%d> " |
| 440 | "-------------------- Deferred %s --------------------", |
| 441 | code->instruction_index(), |
| 442 | code->instr()->hydrogen_value()->id(), |
| 443 | code->instr()->Mnemonic()); |
| 444 | __ bind(code->entry()); |
| 445 | if (NeedsDeferredFrame()) { |
| 446 | Comment(";;; Build frame"); |
| 447 | DCHECK(!frame_is_built_); |
| 448 | DCHECK(info()->IsStub()); |
| 449 | frame_is_built_ = true; |
| 450 | // Build the frame in such a way that esi isn't trashed. |
| 451 | __ push(ebp); // Caller's frame pointer. |
| 452 | __ push(Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 453 | __ push(Immediate(Smi::FromInt(StackFrame::STUB))); |
| 454 | __ lea(ebp, Operand(esp, 2 * kPointerSize)); |
| 455 | Comment(";;; Deferred code"); |
| 456 | } |
| 457 | code->Generate(); |
| 458 | if (NeedsDeferredFrame()) { |
| 459 | __ bind(code->done()); |
| 460 | Comment(";;; Destroy frame"); |
| 461 | DCHECK(frame_is_built_); |
| 462 | frame_is_built_ = false; |
| 463 | __ mov(esp, ebp); |
| 464 | __ pop(ebp); |
| 465 | } |
| 466 | __ jmp(code->exit()); |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | // Deferred code is the last part of the instruction sequence. Mark |
| 471 | // the generated code as done unless we bailed out. |
| 472 | if (!is_aborted()) status_ = DONE; |
| 473 | return !is_aborted(); |
| 474 | } |
| 475 | |
| 476 | |
| 477 | bool LCodeGen::GenerateSafepointTable() { |
| 478 | DCHECK(is_done()); |
| 479 | if (info()->ShouldEnsureSpaceForLazyDeopt()) { |
| 480 | // For lazy deoptimization we need space to patch a call after every call. |
| 481 | // Ensure there is always space for such patching, even if the code ends |
| 482 | // in a call. |
| 483 | int target_offset = masm()->pc_offset() + Deoptimizer::patch_size(); |
| 484 | while (masm()->pc_offset() < target_offset) { |
| 485 | masm()->nop(); |
| 486 | } |
| 487 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 488 | safepoints_.Emit(masm(), GetTotalFrameSlotCount()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 489 | return !is_aborted(); |
| 490 | } |
| 491 | |
| 492 | |
| 493 | Register LCodeGen::ToRegister(int code) const { |
| 494 | return Register::from_code(code); |
| 495 | } |
| 496 | |
| 497 | |
| 498 | X87Register LCodeGen::ToX87Register(int code) const { |
| 499 | return X87Register::from_code(code); |
| 500 | } |
| 501 | |
| 502 | |
| 503 | void LCodeGen::X87LoadForUsage(X87Register reg) { |
| 504 | DCHECK(x87_stack_.Contains(reg)); |
| 505 | x87_stack_.Fxch(reg); |
| 506 | x87_stack_.pop(); |
| 507 | } |
| 508 | |
| 509 | |
| 510 | void LCodeGen::X87LoadForUsage(X87Register reg1, X87Register reg2) { |
| 511 | DCHECK(x87_stack_.Contains(reg1)); |
| 512 | DCHECK(x87_stack_.Contains(reg2)); |
| 513 | if (reg1.is(reg2) && x87_stack_.depth() == 1) { |
| 514 | __ fld(x87_stack_.st(reg1)); |
| 515 | x87_stack_.push(reg1); |
| 516 | x87_stack_.pop(); |
| 517 | x87_stack_.pop(); |
| 518 | } else { |
| 519 | x87_stack_.Fxch(reg1, 1); |
| 520 | x87_stack_.Fxch(reg2); |
| 521 | x87_stack_.pop(); |
| 522 | x87_stack_.pop(); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | |
| 527 | int LCodeGen::X87Stack::GetLayout() { |
| 528 | int layout = stack_depth_; |
| 529 | for (int i = 0; i < stack_depth_; i++) { |
| 530 | layout |= (stack_[stack_depth_ - 1 - i].code() << ((i + 1) * 3)); |
| 531 | } |
| 532 | |
| 533 | return layout; |
| 534 | } |
| 535 | |
| 536 | |
| 537 | void LCodeGen::X87Stack::Fxch(X87Register reg, int other_slot) { |
| 538 | DCHECK(is_mutable_); |
| 539 | DCHECK(Contains(reg) && stack_depth_ > other_slot); |
| 540 | int i = ArrayIndex(reg); |
| 541 | int st = st2idx(i); |
| 542 | if (st != other_slot) { |
| 543 | int other_i = st2idx(other_slot); |
| 544 | X87Register other = stack_[other_i]; |
| 545 | stack_[other_i] = reg; |
| 546 | stack_[i] = other; |
| 547 | if (st == 0) { |
| 548 | __ fxch(other_slot); |
| 549 | } else if (other_slot == 0) { |
| 550 | __ fxch(st); |
| 551 | } else { |
| 552 | __ fxch(st); |
| 553 | __ fxch(other_slot); |
| 554 | __ fxch(st); |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | |
| 560 | int LCodeGen::X87Stack::st2idx(int pos) { |
| 561 | return stack_depth_ - pos - 1; |
| 562 | } |
| 563 | |
| 564 | |
| 565 | int LCodeGen::X87Stack::ArrayIndex(X87Register reg) { |
| 566 | for (int i = 0; i < stack_depth_; i++) { |
| 567 | if (stack_[i].is(reg)) return i; |
| 568 | } |
| 569 | UNREACHABLE(); |
| 570 | return -1; |
| 571 | } |
| 572 | |
| 573 | |
| 574 | bool LCodeGen::X87Stack::Contains(X87Register reg) { |
| 575 | for (int i = 0; i < stack_depth_; i++) { |
| 576 | if (stack_[i].is(reg)) return true; |
| 577 | } |
| 578 | return false; |
| 579 | } |
| 580 | |
| 581 | |
| 582 | void LCodeGen::X87Stack::Free(X87Register reg) { |
| 583 | DCHECK(is_mutable_); |
| 584 | DCHECK(Contains(reg)); |
| 585 | int i = ArrayIndex(reg); |
| 586 | int st = st2idx(i); |
| 587 | if (st > 0) { |
| 588 | // keep track of how fstp(i) changes the order of elements |
| 589 | int tos_i = st2idx(0); |
| 590 | stack_[i] = stack_[tos_i]; |
| 591 | } |
| 592 | pop(); |
| 593 | __ fstp(st); |
| 594 | } |
| 595 | |
| 596 | |
| 597 | void LCodeGen::X87Mov(X87Register dst, Operand src, X87OperandType opts) { |
| 598 | if (x87_stack_.Contains(dst)) { |
| 599 | x87_stack_.Fxch(dst); |
| 600 | __ fstp(0); |
| 601 | } else { |
| 602 | x87_stack_.push(dst); |
| 603 | } |
| 604 | X87Fld(src, opts); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | void LCodeGen::X87Mov(X87Register dst, X87Register src, X87OperandType opts) { |
| 609 | if (x87_stack_.Contains(dst)) { |
| 610 | x87_stack_.Fxch(dst); |
| 611 | __ fstp(0); |
| 612 | x87_stack_.pop(); |
| 613 | // Push ST(i) onto the FPU register stack |
| 614 | __ fld(x87_stack_.st(src)); |
| 615 | x87_stack_.push(dst); |
| 616 | } else { |
| 617 | // Push ST(i) onto the FPU register stack |
| 618 | __ fld(x87_stack_.st(src)); |
| 619 | x87_stack_.push(dst); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | |
| 624 | void LCodeGen::X87Fld(Operand src, X87OperandType opts) { |
| 625 | DCHECK(!src.is_reg_only()); |
| 626 | switch (opts) { |
| 627 | case kX87DoubleOperand: |
| 628 | __ fld_d(src); |
| 629 | break; |
| 630 | case kX87FloatOperand: |
| 631 | __ fld_s(src); |
| 632 | break; |
| 633 | case kX87IntOperand: |
| 634 | __ fild_s(src); |
| 635 | break; |
| 636 | default: |
| 637 | UNREACHABLE(); |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | |
| 642 | void LCodeGen::X87Mov(Operand dst, X87Register src, X87OperandType opts) { |
| 643 | DCHECK(!dst.is_reg_only()); |
| 644 | x87_stack_.Fxch(src); |
| 645 | switch (opts) { |
| 646 | case kX87DoubleOperand: |
| 647 | __ fst_d(dst); |
| 648 | break; |
| 649 | case kX87FloatOperand: |
| 650 | __ fst_s(dst); |
| 651 | break; |
| 652 | case kX87IntOperand: |
| 653 | __ fist_s(dst); |
| 654 | break; |
| 655 | default: |
| 656 | UNREACHABLE(); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | |
| 661 | void LCodeGen::X87Stack::PrepareToWrite(X87Register reg) { |
| 662 | DCHECK(is_mutable_); |
| 663 | if (Contains(reg)) { |
| 664 | Free(reg); |
| 665 | } |
| 666 | // Mark this register as the next register to write to |
| 667 | stack_[stack_depth_] = reg; |
| 668 | } |
| 669 | |
| 670 | |
| 671 | void LCodeGen::X87Stack::CommitWrite(X87Register reg) { |
| 672 | DCHECK(is_mutable_); |
| 673 | // Assert the reg is prepared to write, but not on the virtual stack yet |
| 674 | DCHECK(!Contains(reg) && stack_[stack_depth_].is(reg) && |
| 675 | stack_depth_ < X87Register::kMaxNumAllocatableRegisters); |
| 676 | stack_depth_++; |
| 677 | } |
| 678 | |
| 679 | |
| 680 | void LCodeGen::X87PrepareBinaryOp( |
| 681 | X87Register left, X87Register right, X87Register result) { |
| 682 | // You need to use DefineSameAsFirst for x87 instructions |
| 683 | DCHECK(result.is(left)); |
| 684 | x87_stack_.Fxch(right, 1); |
| 685 | x87_stack_.Fxch(left); |
| 686 | } |
| 687 | |
| 688 | |
| 689 | void LCodeGen::X87Stack::FlushIfNecessary(LInstruction* instr, LCodeGen* cgen) { |
| 690 | if (stack_depth_ > 0 && instr->ClobbersDoubleRegisters(isolate())) { |
| 691 | bool double_inputs = instr->HasDoubleRegisterInput(); |
| 692 | |
| 693 | // Flush stack from tos down, since FreeX87() will mess with tos |
| 694 | for (int i = stack_depth_-1; i >= 0; i--) { |
| 695 | X87Register reg = stack_[i]; |
| 696 | // Skip registers which contain the inputs for the next instruction |
| 697 | // when flushing the stack |
| 698 | if (double_inputs && instr->IsDoubleInput(reg, cgen)) { |
| 699 | continue; |
| 700 | } |
| 701 | Free(reg); |
| 702 | if (i < stack_depth_-1) i++; |
| 703 | } |
| 704 | } |
| 705 | if (instr->IsReturn()) { |
| 706 | while (stack_depth_ > 0) { |
| 707 | __ fstp(0); |
| 708 | stack_depth_--; |
| 709 | } |
| 710 | if (FLAG_debug_code && FLAG_enable_slow_asserts) __ VerifyX87StackDepth(0); |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | |
| 715 | void LCodeGen::X87Stack::LeavingBlock(int current_block_id, LGoto* goto_instr, |
| 716 | LCodeGen* cgen) { |
| 717 | // For going to a joined block, an explicit LClobberDoubles is inserted before |
| 718 | // LGoto. Because all used x87 registers are spilled to stack slots. The |
| 719 | // ResolvePhis phase of register allocator could guarantee the two input's x87 |
| 720 | // stacks have the same layout. So don't check stack_depth_ <= 1 here. |
| 721 | int goto_block_id = goto_instr->block_id(); |
| 722 | if (current_block_id + 1 != goto_block_id) { |
| 723 | // If we have a value on the x87 stack on leaving a block, it must be a |
| 724 | // phi input. If the next block we compile is not the join block, we have |
| 725 | // to discard the stack state. |
| 726 | // Before discarding the stack state, we need to save it if the "goto block" |
| 727 | // has unreachable last predecessor when FLAG_unreachable_code_elimination. |
| 728 | if (FLAG_unreachable_code_elimination) { |
| 729 | int length = goto_instr->block()->predecessors()->length(); |
| 730 | bool has_unreachable_last_predecessor = false; |
| 731 | for (int i = 0; i < length; i++) { |
| 732 | HBasicBlock* block = goto_instr->block()->predecessors()->at(i); |
| 733 | if (block->IsUnreachable() && |
| 734 | (block->block_id() + 1) == goto_block_id) { |
| 735 | has_unreachable_last_predecessor = true; |
| 736 | } |
| 737 | } |
| 738 | if (has_unreachable_last_predecessor) { |
| 739 | if (cgen->x87_stack_map_.find(goto_block_id) == |
| 740 | cgen->x87_stack_map_.end()) { |
| 741 | X87Stack* stack = new (cgen->zone()) X87Stack(*this); |
| 742 | cgen->x87_stack_map_.insert(std::make_pair(goto_block_id, stack)); |
| 743 | } |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | // Discard the stack state. |
| 748 | stack_depth_ = 0; |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | |
| 753 | void LCodeGen::EmitFlushX87ForDeopt() { |
| 754 | // The deoptimizer does not support X87 Registers. But as long as we |
| 755 | // deopt from a stub its not a problem, since we will re-materialize the |
| 756 | // original stub inputs, which can't be double registers. |
| 757 | // DCHECK(info()->IsStub()); |
| 758 | if (FLAG_debug_code && FLAG_enable_slow_asserts) { |
| 759 | __ pushfd(); |
| 760 | __ VerifyX87StackDepth(x87_stack_.depth()); |
| 761 | __ popfd(); |
| 762 | } |
| 763 | |
| 764 | // Flush X87 stack in the deoptimizer entry. |
| 765 | } |
| 766 | |
| 767 | |
| 768 | Register LCodeGen::ToRegister(LOperand* op) const { |
| 769 | DCHECK(op->IsRegister()); |
| 770 | return ToRegister(op->index()); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | X87Register LCodeGen::ToX87Register(LOperand* op) const { |
| 775 | DCHECK(op->IsDoubleRegister()); |
| 776 | return ToX87Register(op->index()); |
| 777 | } |
| 778 | |
| 779 | |
| 780 | int32_t LCodeGen::ToInteger32(LConstantOperand* op) const { |
| 781 | return ToRepresentation(op, Representation::Integer32()); |
| 782 | } |
| 783 | |
| 784 | |
| 785 | int32_t LCodeGen::ToRepresentation(LConstantOperand* op, |
| 786 | const Representation& r) const { |
| 787 | HConstant* constant = chunk_->LookupConstant(op); |
| 788 | if (r.IsExternal()) { |
| 789 | return reinterpret_cast<int32_t>( |
| 790 | constant->ExternalReferenceValue().address()); |
| 791 | } |
| 792 | int32_t value = constant->Integer32Value(); |
| 793 | if (r.IsInteger32()) return value; |
| 794 | DCHECK(r.IsSmiOrTagged()); |
| 795 | return reinterpret_cast<int32_t>(Smi::FromInt(value)); |
| 796 | } |
| 797 | |
| 798 | |
| 799 | Handle<Object> LCodeGen::ToHandle(LConstantOperand* op) const { |
| 800 | HConstant* constant = chunk_->LookupConstant(op); |
| 801 | DCHECK(chunk_->LookupLiteralRepresentation(op).IsSmiOrTagged()); |
| 802 | return constant->handle(isolate()); |
| 803 | } |
| 804 | |
| 805 | |
| 806 | double LCodeGen::ToDouble(LConstantOperand* op) const { |
| 807 | HConstant* constant = chunk_->LookupConstant(op); |
| 808 | DCHECK(constant->HasDoubleValue()); |
| 809 | return constant->DoubleValue(); |
| 810 | } |
| 811 | |
| 812 | |
| 813 | ExternalReference LCodeGen::ToExternalReference(LConstantOperand* op) const { |
| 814 | HConstant* constant = chunk_->LookupConstant(op); |
| 815 | DCHECK(constant->HasExternalReferenceValue()); |
| 816 | return constant->ExternalReferenceValue(); |
| 817 | } |
| 818 | |
| 819 | |
| 820 | bool LCodeGen::IsInteger32(LConstantOperand* op) const { |
| 821 | return chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32(); |
| 822 | } |
| 823 | |
| 824 | |
| 825 | bool LCodeGen::IsSmi(LConstantOperand* op) const { |
| 826 | return chunk_->LookupLiteralRepresentation(op).IsSmi(); |
| 827 | } |
| 828 | |
| 829 | |
| 830 | static int ArgumentsOffsetWithoutFrame(int index) { |
| 831 | DCHECK(index < 0); |
| 832 | return -(index + 1) * kPointerSize + kPCOnStackSize; |
| 833 | } |
| 834 | |
| 835 | |
| 836 | Operand LCodeGen::ToOperand(LOperand* op) const { |
| 837 | if (op->IsRegister()) return Operand(ToRegister(op)); |
| 838 | DCHECK(!op->IsDoubleRegister()); |
| 839 | DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot()); |
| 840 | if (NeedsEagerFrame()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 841 | return Operand(ebp, FrameSlotToFPOffset(op->index())); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 842 | } else { |
| 843 | // Retrieve parameter without eager stack-frame relative to the |
| 844 | // stack-pointer. |
| 845 | return Operand(esp, ArgumentsOffsetWithoutFrame(op->index())); |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | |
| 850 | Operand LCodeGen::HighOperand(LOperand* op) { |
| 851 | DCHECK(op->IsDoubleStackSlot()); |
| 852 | if (NeedsEagerFrame()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 853 | return Operand(ebp, FrameSlotToFPOffset(op->index()) + kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 854 | } else { |
| 855 | // Retrieve parameter without eager stack-frame relative to the |
| 856 | // stack-pointer. |
| 857 | return Operand( |
| 858 | esp, ArgumentsOffsetWithoutFrame(op->index()) + kPointerSize); |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | |
| 863 | void LCodeGen::WriteTranslation(LEnvironment* environment, |
| 864 | Translation* translation) { |
| 865 | if (environment == NULL) return; |
| 866 | |
| 867 | // The translation includes one command per value in the environment. |
| 868 | int translation_size = environment->translation_size(); |
| 869 | |
| 870 | WriteTranslation(environment->outer(), translation); |
| 871 | WriteTranslationFrame(environment, translation); |
| 872 | |
| 873 | int object_index = 0; |
| 874 | int dematerialized_index = 0; |
| 875 | for (int i = 0; i < translation_size; ++i) { |
| 876 | LOperand* value = environment->values()->at(i); |
| 877 | AddToTranslation(environment, |
| 878 | translation, |
| 879 | value, |
| 880 | environment->HasTaggedValueAt(i), |
| 881 | environment->HasUint32ValueAt(i), |
| 882 | &object_index, |
| 883 | &dematerialized_index); |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | |
| 888 | void LCodeGen::AddToTranslation(LEnvironment* environment, |
| 889 | Translation* translation, |
| 890 | LOperand* op, |
| 891 | bool is_tagged, |
| 892 | bool is_uint32, |
| 893 | int* object_index_pointer, |
| 894 | int* dematerialized_index_pointer) { |
| 895 | if (op == LEnvironment::materialization_marker()) { |
| 896 | int object_index = (*object_index_pointer)++; |
| 897 | if (environment->ObjectIsDuplicateAt(object_index)) { |
| 898 | int dupe_of = environment->ObjectDuplicateOfAt(object_index); |
| 899 | translation->DuplicateObject(dupe_of); |
| 900 | return; |
| 901 | } |
| 902 | int object_length = environment->ObjectLengthAt(object_index); |
| 903 | if (environment->ObjectIsArgumentsAt(object_index)) { |
| 904 | translation->BeginArgumentsObject(object_length); |
| 905 | } else { |
| 906 | translation->BeginCapturedObject(object_length); |
| 907 | } |
| 908 | int dematerialized_index = *dematerialized_index_pointer; |
| 909 | int env_offset = environment->translation_size() + dematerialized_index; |
| 910 | *dematerialized_index_pointer += object_length; |
| 911 | for (int i = 0; i < object_length; ++i) { |
| 912 | LOperand* value = environment->values()->at(env_offset + i); |
| 913 | AddToTranslation(environment, |
| 914 | translation, |
| 915 | value, |
| 916 | environment->HasTaggedValueAt(env_offset + i), |
| 917 | environment->HasUint32ValueAt(env_offset + i), |
| 918 | object_index_pointer, |
| 919 | dematerialized_index_pointer); |
| 920 | } |
| 921 | return; |
| 922 | } |
| 923 | |
| 924 | if (op->IsStackSlot()) { |
| 925 | int index = op->index(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 926 | if (is_tagged) { |
| 927 | translation->StoreStackSlot(index); |
| 928 | } else if (is_uint32) { |
| 929 | translation->StoreUint32StackSlot(index); |
| 930 | } else { |
| 931 | translation->StoreInt32StackSlot(index); |
| 932 | } |
| 933 | } else if (op->IsDoubleStackSlot()) { |
| 934 | int index = op->index(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 935 | translation->StoreDoubleStackSlot(index); |
| 936 | } else if (op->IsRegister()) { |
| 937 | Register reg = ToRegister(op); |
| 938 | if (is_tagged) { |
| 939 | translation->StoreRegister(reg); |
| 940 | } else if (is_uint32) { |
| 941 | translation->StoreUint32Register(reg); |
| 942 | } else { |
| 943 | translation->StoreInt32Register(reg); |
| 944 | } |
| 945 | } else if (op->IsDoubleRegister()) { |
| 946 | X87Register reg = ToX87Register(op); |
| 947 | translation->StoreDoubleRegister(reg); |
| 948 | } else if (op->IsConstantOperand()) { |
| 949 | HConstant* constant = chunk()->LookupConstant(LConstantOperand::cast(op)); |
| 950 | int src_index = DefineDeoptimizationLiteral(constant->handle(isolate())); |
| 951 | translation->StoreLiteral(src_index); |
| 952 | } else { |
| 953 | UNREACHABLE(); |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | |
| 958 | void LCodeGen::CallCodeGeneric(Handle<Code> code, |
| 959 | RelocInfo::Mode mode, |
| 960 | LInstruction* instr, |
| 961 | SafepointMode safepoint_mode) { |
| 962 | DCHECK(instr != NULL); |
| 963 | __ call(code, mode); |
| 964 | RecordSafepointWithLazyDeopt(instr, safepoint_mode); |
| 965 | |
| 966 | // Signal that we don't inline smi code before these stubs in the |
| 967 | // optimizing code generator. |
| 968 | if (code->kind() == Code::BINARY_OP_IC || |
| 969 | code->kind() == Code::COMPARE_IC) { |
| 970 | __ nop(); |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | |
| 975 | void LCodeGen::CallCode(Handle<Code> code, |
| 976 | RelocInfo::Mode mode, |
| 977 | LInstruction* instr) { |
| 978 | CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT); |
| 979 | } |
| 980 | |
| 981 | |
| 982 | void LCodeGen::CallRuntime(const Runtime::Function* fun, int argc, |
| 983 | LInstruction* instr, SaveFPRegsMode save_doubles) { |
| 984 | DCHECK(instr != NULL); |
| 985 | DCHECK(instr->HasPointerMap()); |
| 986 | |
| 987 | __ CallRuntime(fun, argc, save_doubles); |
| 988 | |
| 989 | RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| 990 | |
| 991 | DCHECK(info()->is_calling()); |
| 992 | } |
| 993 | |
| 994 | |
| 995 | void LCodeGen::LoadContextFromDeferred(LOperand* context) { |
| 996 | if (context->IsRegister()) { |
| 997 | if (!ToRegister(context).is(esi)) { |
| 998 | __ mov(esi, ToRegister(context)); |
| 999 | } |
| 1000 | } else if (context->IsStackSlot()) { |
| 1001 | __ mov(esi, ToOperand(context)); |
| 1002 | } else if (context->IsConstantOperand()) { |
| 1003 | HConstant* constant = |
| 1004 | chunk_->LookupConstant(LConstantOperand::cast(context)); |
| 1005 | __ LoadObject(esi, Handle<Object>::cast(constant->handle(isolate()))); |
| 1006 | } else { |
| 1007 | UNREACHABLE(); |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id, |
| 1012 | int argc, |
| 1013 | LInstruction* instr, |
| 1014 | LOperand* context) { |
| 1015 | LoadContextFromDeferred(context); |
| 1016 | |
| 1017 | __ CallRuntimeSaveDoubles(id); |
| 1018 | RecordSafepointWithRegisters( |
| 1019 | instr->pointer_map(), argc, Safepoint::kNoLazyDeopt); |
| 1020 | |
| 1021 | DCHECK(info()->is_calling()); |
| 1022 | } |
| 1023 | |
| 1024 | |
| 1025 | void LCodeGen::RegisterEnvironmentForDeoptimization( |
| 1026 | LEnvironment* environment, Safepoint::DeoptMode mode) { |
| 1027 | environment->set_has_been_used(); |
| 1028 | if (!environment->HasBeenRegistered()) { |
| 1029 | // Physical stack frame layout: |
| 1030 | // -x ............. -4 0 ..................................... y |
| 1031 | // [incoming arguments] [spill slots] [pushed outgoing arguments] |
| 1032 | |
| 1033 | // Layout of the environment: |
| 1034 | // 0 ..................................................... size-1 |
| 1035 | // [parameters] [locals] [expression stack including arguments] |
| 1036 | |
| 1037 | // Layout of the translation: |
| 1038 | // 0 ........................................................ size - 1 + 4 |
| 1039 | // [expression stack including arguments] [locals] [4 words] [parameters] |
| 1040 | // |>------------ translation_size ------------<| |
| 1041 | |
| 1042 | int frame_count = 0; |
| 1043 | int jsframe_count = 0; |
| 1044 | for (LEnvironment* e = environment; e != NULL; e = e->outer()) { |
| 1045 | ++frame_count; |
| 1046 | if (e->frame_type() == JS_FUNCTION) { |
| 1047 | ++jsframe_count; |
| 1048 | } |
| 1049 | } |
| 1050 | Translation translation(&translations_, frame_count, jsframe_count, zone()); |
| 1051 | WriteTranslation(environment, &translation); |
| 1052 | int deoptimization_index = deoptimizations_.length(); |
| 1053 | int pc_offset = masm()->pc_offset(); |
| 1054 | environment->Register(deoptimization_index, |
| 1055 | translation.index(), |
| 1056 | (mode == Safepoint::kLazyDeopt) ? pc_offset : -1); |
| 1057 | deoptimizations_.Add(environment, zone()); |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | |
| 1062 | void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr, |
| 1063 | Deoptimizer::DeoptReason deopt_reason, |
| 1064 | Deoptimizer::BailoutType bailout_type) { |
| 1065 | LEnvironment* environment = instr->environment(); |
| 1066 | RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); |
| 1067 | DCHECK(environment->HasBeenRegistered()); |
| 1068 | int id = environment->deoptimization_index(); |
| 1069 | Address entry = |
| 1070 | Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type); |
| 1071 | if (entry == NULL) { |
| 1072 | Abort(kBailoutWasNotPrepared); |
| 1073 | return; |
| 1074 | } |
| 1075 | |
| 1076 | if (DeoptEveryNTimes()) { |
| 1077 | ExternalReference count = ExternalReference::stress_deopt_count(isolate()); |
| 1078 | Label no_deopt; |
| 1079 | __ pushfd(); |
| 1080 | __ push(eax); |
| 1081 | __ mov(eax, Operand::StaticVariable(count)); |
| 1082 | __ sub(eax, Immediate(1)); |
| 1083 | __ j(not_zero, &no_deopt, Label::kNear); |
| 1084 | if (FLAG_trap_on_deopt) __ int3(); |
| 1085 | __ mov(eax, Immediate(FLAG_deopt_every_n_times)); |
| 1086 | __ mov(Operand::StaticVariable(count), eax); |
| 1087 | __ pop(eax); |
| 1088 | __ popfd(); |
| 1089 | DCHECK(frame_is_built_); |
| 1090 | // Put the x87 stack layout in TOS. |
| 1091 | if (x87_stack_.depth() > 0) EmitFlushX87ForDeopt(); |
| 1092 | __ push(Immediate(x87_stack_.GetLayout())); |
| 1093 | __ fild_s(MemOperand(esp, 0)); |
| 1094 | // Don't touch eflags. |
| 1095 | __ lea(esp, Operand(esp, kPointerSize)); |
| 1096 | __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| 1097 | __ bind(&no_deopt); |
| 1098 | __ mov(Operand::StaticVariable(count), eax); |
| 1099 | __ pop(eax); |
| 1100 | __ popfd(); |
| 1101 | } |
| 1102 | |
| 1103 | // Put the x87 stack layout in TOS, so that we can save x87 fp registers in |
| 1104 | // the correct location. |
| 1105 | { |
| 1106 | Label done; |
| 1107 | if (cc != no_condition) __ j(NegateCondition(cc), &done, Label::kNear); |
| 1108 | if (x87_stack_.depth() > 0) EmitFlushX87ForDeopt(); |
| 1109 | |
| 1110 | int x87_stack_layout = x87_stack_.GetLayout(); |
| 1111 | __ push(Immediate(x87_stack_layout)); |
| 1112 | __ fild_s(MemOperand(esp, 0)); |
| 1113 | // Don't touch eflags. |
| 1114 | __ lea(esp, Operand(esp, kPointerSize)); |
| 1115 | __ bind(&done); |
| 1116 | } |
| 1117 | |
| 1118 | if (info()->ShouldTrapOnDeopt()) { |
| 1119 | Label done; |
| 1120 | if (cc != no_condition) __ j(NegateCondition(cc), &done, Label::kNear); |
| 1121 | __ int3(); |
| 1122 | __ bind(&done); |
| 1123 | } |
| 1124 | |
| 1125 | Deoptimizer::DeoptInfo deopt_info = MakeDeoptInfo(instr, deopt_reason); |
| 1126 | |
| 1127 | DCHECK(info()->IsStub() || frame_is_built_); |
| 1128 | if (cc == no_condition && frame_is_built_) { |
| 1129 | DeoptComment(deopt_info); |
| 1130 | __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| 1131 | info()->LogDeoptCallPosition(masm()->pc_offset(), deopt_info.inlining_id); |
| 1132 | } else { |
| 1133 | Deoptimizer::JumpTableEntry table_entry(entry, deopt_info, bailout_type, |
| 1134 | !frame_is_built_); |
| 1135 | // We often have several deopts to the same entry, reuse the last |
| 1136 | // jump entry if this is the case. |
| 1137 | if (FLAG_trace_deopt || isolate()->cpu_profiler()->is_profiling() || |
| 1138 | jump_table_.is_empty() || |
| 1139 | !table_entry.IsEquivalentTo(jump_table_.last())) { |
| 1140 | jump_table_.Add(table_entry, zone()); |
| 1141 | } |
| 1142 | if (cc == no_condition) { |
| 1143 | __ jmp(&jump_table_.last().label); |
| 1144 | } else { |
| 1145 | __ j(cc, &jump_table_.last().label); |
| 1146 | } |
| 1147 | } |
| 1148 | } |
| 1149 | |
| 1150 | |
| 1151 | void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr, |
| 1152 | Deoptimizer::DeoptReason deopt_reason) { |
| 1153 | Deoptimizer::BailoutType bailout_type = info()->IsStub() |
| 1154 | ? Deoptimizer::LAZY |
| 1155 | : Deoptimizer::EAGER; |
| 1156 | DeoptimizeIf(cc, instr, deopt_reason, bailout_type); |
| 1157 | } |
| 1158 | |
| 1159 | |
| 1160 | void LCodeGen::RecordSafepointWithLazyDeopt( |
| 1161 | LInstruction* instr, SafepointMode safepoint_mode) { |
| 1162 | if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) { |
| 1163 | RecordSafepoint(instr->pointer_map(), Safepoint::kLazyDeopt); |
| 1164 | } else { |
| 1165 | DCHECK(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| 1166 | RecordSafepointWithRegisters( |
| 1167 | instr->pointer_map(), 0, Safepoint::kLazyDeopt); |
| 1168 | } |
| 1169 | } |
| 1170 | |
| 1171 | |
| 1172 | void LCodeGen::RecordSafepoint( |
| 1173 | LPointerMap* pointers, |
| 1174 | Safepoint::Kind kind, |
| 1175 | int arguments, |
| 1176 | Safepoint::DeoptMode deopt_mode) { |
| 1177 | DCHECK(kind == expected_safepoint_kind_); |
| 1178 | const ZoneList<LOperand*>* operands = pointers->GetNormalizedOperands(); |
| 1179 | Safepoint safepoint = |
| 1180 | safepoints_.DefineSafepoint(masm(), kind, arguments, deopt_mode); |
| 1181 | for (int i = 0; i < operands->length(); i++) { |
| 1182 | LOperand* pointer = operands->at(i); |
| 1183 | if (pointer->IsStackSlot()) { |
| 1184 | safepoint.DefinePointerSlot(pointer->index(), zone()); |
| 1185 | } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) { |
| 1186 | safepoint.DefinePointerRegister(ToRegister(pointer), zone()); |
| 1187 | } |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | |
| 1192 | void LCodeGen::RecordSafepoint(LPointerMap* pointers, |
| 1193 | Safepoint::DeoptMode mode) { |
| 1194 | RecordSafepoint(pointers, Safepoint::kSimple, 0, mode); |
| 1195 | } |
| 1196 | |
| 1197 | |
| 1198 | void LCodeGen::RecordSafepoint(Safepoint::DeoptMode mode) { |
| 1199 | LPointerMap empty_pointers(zone()); |
| 1200 | RecordSafepoint(&empty_pointers, mode); |
| 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers, |
| 1205 | int arguments, |
| 1206 | Safepoint::DeoptMode mode) { |
| 1207 | RecordSafepoint(pointers, Safepoint::kWithRegisters, arguments, mode); |
| 1208 | } |
| 1209 | |
| 1210 | |
| 1211 | void LCodeGen::RecordAndWritePosition(int position) { |
| 1212 | if (position == RelocInfo::kNoPosition) return; |
| 1213 | masm()->positions_recorder()->RecordPosition(position); |
| 1214 | masm()->positions_recorder()->WriteRecordedPositions(); |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | static const char* LabelType(LLabel* label) { |
| 1219 | if (label->is_loop_header()) return " (loop header)"; |
| 1220 | if (label->is_osr_entry()) return " (OSR entry)"; |
| 1221 | return ""; |
| 1222 | } |
| 1223 | |
| 1224 | |
| 1225 | void LCodeGen::DoLabel(LLabel* label) { |
| 1226 | Comment(";;; <@%d,#%d> -------------------- B%d%s --------------------", |
| 1227 | current_instruction_, |
| 1228 | label->hydrogen_value()->id(), |
| 1229 | label->block_id(), |
| 1230 | LabelType(label)); |
| 1231 | __ bind(label->label()); |
| 1232 | current_block_ = label->block_id(); |
| 1233 | if (label->block()->predecessors()->length() > 1) { |
| 1234 | // A join block's x87 stack is that of its last visited predecessor. |
| 1235 | // If the last visited predecessor block is unreachable, the stack state |
| 1236 | // will be wrong. In such case, use the x87 stack of reachable predecessor. |
| 1237 | X87StackMap::const_iterator it = x87_stack_map_.find(current_block_); |
| 1238 | // Restore x87 stack. |
| 1239 | if (it != x87_stack_map_.end()) { |
| 1240 | x87_stack_ = *(it->second); |
| 1241 | } |
| 1242 | } |
| 1243 | DoGap(label); |
| 1244 | } |
| 1245 | |
| 1246 | |
| 1247 | void LCodeGen::DoParallelMove(LParallelMove* move) { |
| 1248 | resolver_.Resolve(move); |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | void LCodeGen::DoGap(LGap* gap) { |
| 1253 | for (int i = LGap::FIRST_INNER_POSITION; |
| 1254 | i <= LGap::LAST_INNER_POSITION; |
| 1255 | i++) { |
| 1256 | LGap::InnerPosition inner_pos = static_cast<LGap::InnerPosition>(i); |
| 1257 | LParallelMove* move = gap->GetParallelMove(inner_pos); |
| 1258 | if (move != NULL) DoParallelMove(move); |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | void LCodeGen::DoInstructionGap(LInstructionGap* instr) { |
| 1264 | DoGap(instr); |
| 1265 | } |
| 1266 | |
| 1267 | |
| 1268 | void LCodeGen::DoParameter(LParameter* instr) { |
| 1269 | // Nothing to do. |
| 1270 | } |
| 1271 | |
| 1272 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1273 | void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { |
| 1274 | GenerateOsrPrologue(); |
| 1275 | } |
| 1276 | |
| 1277 | |
| 1278 | void LCodeGen::DoModByPowerOf2I(LModByPowerOf2I* instr) { |
| 1279 | Register dividend = ToRegister(instr->dividend()); |
| 1280 | int32_t divisor = instr->divisor(); |
| 1281 | DCHECK(dividend.is(ToRegister(instr->result()))); |
| 1282 | |
| 1283 | // Theoretically, a variation of the branch-free code for integer division by |
| 1284 | // a power of 2 (calculating the remainder via an additional multiplication |
| 1285 | // (which gets simplified to an 'and') and subtraction) should be faster, and |
| 1286 | // this is exactly what GCC and clang emit. Nevertheless, benchmarks seem to |
| 1287 | // indicate that positive dividends are heavily favored, so the branching |
| 1288 | // version performs better. |
| 1289 | HMod* hmod = instr->hydrogen(); |
| 1290 | int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1); |
| 1291 | Label dividend_is_not_negative, done; |
| 1292 | if (hmod->CheckFlag(HValue::kLeftCanBeNegative)) { |
| 1293 | __ test(dividend, dividend); |
| 1294 | __ j(not_sign, ÷nd_is_not_negative, Label::kNear); |
| 1295 | // Note that this is correct even for kMinInt operands. |
| 1296 | __ neg(dividend); |
| 1297 | __ and_(dividend, mask); |
| 1298 | __ neg(dividend); |
| 1299 | if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1300 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1301 | } |
| 1302 | __ jmp(&done, Label::kNear); |
| 1303 | } |
| 1304 | |
| 1305 | __ bind(÷nd_is_not_negative); |
| 1306 | __ and_(dividend, mask); |
| 1307 | __ bind(&done); |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | void LCodeGen::DoModByConstI(LModByConstI* instr) { |
| 1312 | Register dividend = ToRegister(instr->dividend()); |
| 1313 | int32_t divisor = instr->divisor(); |
| 1314 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 1315 | |
| 1316 | if (divisor == 0) { |
| 1317 | DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero); |
| 1318 | return; |
| 1319 | } |
| 1320 | |
| 1321 | __ TruncatingDiv(dividend, Abs(divisor)); |
| 1322 | __ imul(edx, edx, Abs(divisor)); |
| 1323 | __ mov(eax, dividend); |
| 1324 | __ sub(eax, edx); |
| 1325 | |
| 1326 | // Check for negative zero. |
| 1327 | HMod* hmod = instr->hydrogen(); |
| 1328 | if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1329 | Label remainder_not_zero; |
| 1330 | __ j(not_zero, &remainder_not_zero, Label::kNear); |
| 1331 | __ cmp(dividend, Immediate(0)); |
| 1332 | DeoptimizeIf(less, instr, Deoptimizer::kMinusZero); |
| 1333 | __ bind(&remainder_not_zero); |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | |
| 1338 | void LCodeGen::DoModI(LModI* instr) { |
| 1339 | HMod* hmod = instr->hydrogen(); |
| 1340 | |
| 1341 | Register left_reg = ToRegister(instr->left()); |
| 1342 | DCHECK(left_reg.is(eax)); |
| 1343 | Register right_reg = ToRegister(instr->right()); |
| 1344 | DCHECK(!right_reg.is(eax)); |
| 1345 | DCHECK(!right_reg.is(edx)); |
| 1346 | Register result_reg = ToRegister(instr->result()); |
| 1347 | DCHECK(result_reg.is(edx)); |
| 1348 | |
| 1349 | Label done; |
| 1350 | // Check for x % 0, idiv would signal a divide error. We have to |
| 1351 | // deopt in this case because we can't return a NaN. |
| 1352 | if (hmod->CheckFlag(HValue::kCanBeDivByZero)) { |
| 1353 | __ test(right_reg, Operand(right_reg)); |
| 1354 | DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero); |
| 1355 | } |
| 1356 | |
| 1357 | // Check for kMinInt % -1, idiv would signal a divide error. We |
| 1358 | // have to deopt if we care about -0, because we can't return that. |
| 1359 | if (hmod->CheckFlag(HValue::kCanOverflow)) { |
| 1360 | Label no_overflow_possible; |
| 1361 | __ cmp(left_reg, kMinInt); |
| 1362 | __ j(not_equal, &no_overflow_possible, Label::kNear); |
| 1363 | __ cmp(right_reg, -1); |
| 1364 | if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1365 | DeoptimizeIf(equal, instr, Deoptimizer::kMinusZero); |
| 1366 | } else { |
| 1367 | __ j(not_equal, &no_overflow_possible, Label::kNear); |
| 1368 | __ Move(result_reg, Immediate(0)); |
| 1369 | __ jmp(&done, Label::kNear); |
| 1370 | } |
| 1371 | __ bind(&no_overflow_possible); |
| 1372 | } |
| 1373 | |
| 1374 | // Sign extend dividend in eax into edx:eax. |
| 1375 | __ cdq(); |
| 1376 | |
| 1377 | // If we care about -0, test if the dividend is <0 and the result is 0. |
| 1378 | if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1379 | Label positive_left; |
| 1380 | __ test(left_reg, Operand(left_reg)); |
| 1381 | __ j(not_sign, &positive_left, Label::kNear); |
| 1382 | __ idiv(right_reg); |
| 1383 | __ test(result_reg, Operand(result_reg)); |
| 1384 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1385 | __ jmp(&done, Label::kNear); |
| 1386 | __ bind(&positive_left); |
| 1387 | } |
| 1388 | __ idiv(right_reg); |
| 1389 | __ bind(&done); |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | void LCodeGen::DoDivByPowerOf2I(LDivByPowerOf2I* instr) { |
| 1394 | Register dividend = ToRegister(instr->dividend()); |
| 1395 | int32_t divisor = instr->divisor(); |
| 1396 | Register result = ToRegister(instr->result()); |
| 1397 | DCHECK(divisor == kMinInt || base::bits::IsPowerOfTwo32(Abs(divisor))); |
| 1398 | DCHECK(!result.is(dividend)); |
| 1399 | |
| 1400 | // Check for (0 / -x) that will produce negative zero. |
| 1401 | HDiv* hdiv = instr->hydrogen(); |
| 1402 | if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| 1403 | __ test(dividend, dividend); |
| 1404 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1405 | } |
| 1406 | // Check for (kMinInt / -1). |
| 1407 | if (hdiv->CheckFlag(HValue::kCanOverflow) && divisor == -1) { |
| 1408 | __ cmp(dividend, kMinInt); |
| 1409 | DeoptimizeIf(zero, instr, Deoptimizer::kOverflow); |
| 1410 | } |
| 1411 | // Deoptimize if remainder will not be 0. |
| 1412 | if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) && |
| 1413 | divisor != 1 && divisor != -1) { |
| 1414 | int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1); |
| 1415 | __ test(dividend, Immediate(mask)); |
| 1416 | DeoptimizeIf(not_zero, instr, Deoptimizer::kLostPrecision); |
| 1417 | } |
| 1418 | __ Move(result, dividend); |
| 1419 | int32_t shift = WhichPowerOf2Abs(divisor); |
| 1420 | if (shift > 0) { |
| 1421 | // The arithmetic shift is always OK, the 'if' is an optimization only. |
| 1422 | if (shift > 1) __ sar(result, 31); |
| 1423 | __ shr(result, 32 - shift); |
| 1424 | __ add(result, dividend); |
| 1425 | __ sar(result, shift); |
| 1426 | } |
| 1427 | if (divisor < 0) __ neg(result); |
| 1428 | } |
| 1429 | |
| 1430 | |
| 1431 | void LCodeGen::DoDivByConstI(LDivByConstI* instr) { |
| 1432 | Register dividend = ToRegister(instr->dividend()); |
| 1433 | int32_t divisor = instr->divisor(); |
| 1434 | DCHECK(ToRegister(instr->result()).is(edx)); |
| 1435 | |
| 1436 | if (divisor == 0) { |
| 1437 | DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero); |
| 1438 | return; |
| 1439 | } |
| 1440 | |
| 1441 | // Check for (0 / -x) that will produce negative zero. |
| 1442 | HDiv* hdiv = instr->hydrogen(); |
| 1443 | if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| 1444 | __ test(dividend, dividend); |
| 1445 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1446 | } |
| 1447 | |
| 1448 | __ TruncatingDiv(dividend, Abs(divisor)); |
| 1449 | if (divisor < 0) __ neg(edx); |
| 1450 | |
| 1451 | if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) { |
| 1452 | __ mov(eax, edx); |
| 1453 | __ imul(eax, eax, divisor); |
| 1454 | __ sub(eax, dividend); |
| 1455 | DeoptimizeIf(not_equal, instr, Deoptimizer::kLostPrecision); |
| 1456 | } |
| 1457 | } |
| 1458 | |
| 1459 | |
| 1460 | // TODO(svenpanne) Refactor this to avoid code duplication with DoFlooringDivI. |
| 1461 | void LCodeGen::DoDivI(LDivI* instr) { |
| 1462 | HBinaryOperation* hdiv = instr->hydrogen(); |
| 1463 | Register dividend = ToRegister(instr->dividend()); |
| 1464 | Register divisor = ToRegister(instr->divisor()); |
| 1465 | Register remainder = ToRegister(instr->temp()); |
| 1466 | DCHECK(dividend.is(eax)); |
| 1467 | DCHECK(remainder.is(edx)); |
| 1468 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 1469 | DCHECK(!divisor.is(eax)); |
| 1470 | DCHECK(!divisor.is(edx)); |
| 1471 | |
| 1472 | // Check for x / 0. |
| 1473 | if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) { |
| 1474 | __ test(divisor, divisor); |
| 1475 | DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero); |
| 1476 | } |
| 1477 | |
| 1478 | // Check for (0 / -x) that will produce negative zero. |
| 1479 | if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1480 | Label dividend_not_zero; |
| 1481 | __ test(dividend, dividend); |
| 1482 | __ j(not_zero, ÷nd_not_zero, Label::kNear); |
| 1483 | __ test(divisor, divisor); |
| 1484 | DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero); |
| 1485 | __ bind(÷nd_not_zero); |
| 1486 | } |
| 1487 | |
| 1488 | // Check for (kMinInt / -1). |
| 1489 | if (hdiv->CheckFlag(HValue::kCanOverflow)) { |
| 1490 | Label dividend_not_min_int; |
| 1491 | __ cmp(dividend, kMinInt); |
| 1492 | __ j(not_zero, ÷nd_not_min_int, Label::kNear); |
| 1493 | __ cmp(divisor, -1); |
| 1494 | DeoptimizeIf(zero, instr, Deoptimizer::kOverflow); |
| 1495 | __ bind(÷nd_not_min_int); |
| 1496 | } |
| 1497 | |
| 1498 | // Sign extend to edx (= remainder). |
| 1499 | __ cdq(); |
| 1500 | __ idiv(divisor); |
| 1501 | |
| 1502 | if (!hdiv->CheckFlag(HValue::kAllUsesTruncatingToInt32)) { |
| 1503 | // Deoptimize if remainder is not 0. |
| 1504 | __ test(remainder, remainder); |
| 1505 | DeoptimizeIf(not_zero, instr, Deoptimizer::kLostPrecision); |
| 1506 | } |
| 1507 | } |
| 1508 | |
| 1509 | |
| 1510 | void LCodeGen::DoFlooringDivByPowerOf2I(LFlooringDivByPowerOf2I* instr) { |
| 1511 | Register dividend = ToRegister(instr->dividend()); |
| 1512 | int32_t divisor = instr->divisor(); |
| 1513 | DCHECK(dividend.is(ToRegister(instr->result()))); |
| 1514 | |
| 1515 | // If the divisor is positive, things are easy: There can be no deopts and we |
| 1516 | // can simply do an arithmetic right shift. |
| 1517 | if (divisor == 1) return; |
| 1518 | int32_t shift = WhichPowerOf2Abs(divisor); |
| 1519 | if (divisor > 1) { |
| 1520 | __ sar(dividend, shift); |
| 1521 | return; |
| 1522 | } |
| 1523 | |
| 1524 | // If the divisor is negative, we have to negate and handle edge cases. |
| 1525 | __ neg(dividend); |
| 1526 | if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1527 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1528 | } |
| 1529 | |
| 1530 | // Dividing by -1 is basically negation, unless we overflow. |
| 1531 | if (divisor == -1) { |
| 1532 | if (instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) { |
| 1533 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 1534 | } |
| 1535 | return; |
| 1536 | } |
| 1537 | |
| 1538 | // If the negation could not overflow, simply shifting is OK. |
| 1539 | if (!instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) { |
| 1540 | __ sar(dividend, shift); |
| 1541 | return; |
| 1542 | } |
| 1543 | |
| 1544 | Label not_kmin_int, done; |
| 1545 | __ j(no_overflow, ¬_kmin_int, Label::kNear); |
| 1546 | __ mov(dividend, Immediate(kMinInt / divisor)); |
| 1547 | __ jmp(&done, Label::kNear); |
| 1548 | __ bind(¬_kmin_int); |
| 1549 | __ sar(dividend, shift); |
| 1550 | __ bind(&done); |
| 1551 | } |
| 1552 | |
| 1553 | |
| 1554 | void LCodeGen::DoFlooringDivByConstI(LFlooringDivByConstI* instr) { |
| 1555 | Register dividend = ToRegister(instr->dividend()); |
| 1556 | int32_t divisor = instr->divisor(); |
| 1557 | DCHECK(ToRegister(instr->result()).is(edx)); |
| 1558 | |
| 1559 | if (divisor == 0) { |
| 1560 | DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero); |
| 1561 | return; |
| 1562 | } |
| 1563 | |
| 1564 | // Check for (0 / -x) that will produce negative zero. |
| 1565 | HMathFloorOfDiv* hdiv = instr->hydrogen(); |
| 1566 | if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| 1567 | __ test(dividend, dividend); |
| 1568 | DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero); |
| 1569 | } |
| 1570 | |
| 1571 | // Easy case: We need no dynamic check for the dividend and the flooring |
| 1572 | // division is the same as the truncating division. |
| 1573 | if ((divisor > 0 && !hdiv->CheckFlag(HValue::kLeftCanBeNegative)) || |
| 1574 | (divisor < 0 && !hdiv->CheckFlag(HValue::kLeftCanBePositive))) { |
| 1575 | __ TruncatingDiv(dividend, Abs(divisor)); |
| 1576 | if (divisor < 0) __ neg(edx); |
| 1577 | return; |
| 1578 | } |
| 1579 | |
| 1580 | // In the general case we may need to adjust before and after the truncating |
| 1581 | // division to get a flooring division. |
| 1582 | Register temp = ToRegister(instr->temp3()); |
| 1583 | DCHECK(!temp.is(dividend) && !temp.is(eax) && !temp.is(edx)); |
| 1584 | Label needs_adjustment, done; |
| 1585 | __ cmp(dividend, Immediate(0)); |
| 1586 | __ j(divisor > 0 ? less : greater, &needs_adjustment, Label::kNear); |
| 1587 | __ TruncatingDiv(dividend, Abs(divisor)); |
| 1588 | if (divisor < 0) __ neg(edx); |
| 1589 | __ jmp(&done, Label::kNear); |
| 1590 | __ bind(&needs_adjustment); |
| 1591 | __ lea(temp, Operand(dividend, divisor > 0 ? 1 : -1)); |
| 1592 | __ TruncatingDiv(temp, Abs(divisor)); |
| 1593 | if (divisor < 0) __ neg(edx); |
| 1594 | __ dec(edx); |
| 1595 | __ bind(&done); |
| 1596 | } |
| 1597 | |
| 1598 | |
| 1599 | // TODO(svenpanne) Refactor this to avoid code duplication with DoDivI. |
| 1600 | void LCodeGen::DoFlooringDivI(LFlooringDivI* instr) { |
| 1601 | HBinaryOperation* hdiv = instr->hydrogen(); |
| 1602 | Register dividend = ToRegister(instr->dividend()); |
| 1603 | Register divisor = ToRegister(instr->divisor()); |
| 1604 | Register remainder = ToRegister(instr->temp()); |
| 1605 | Register result = ToRegister(instr->result()); |
| 1606 | DCHECK(dividend.is(eax)); |
| 1607 | DCHECK(remainder.is(edx)); |
| 1608 | DCHECK(result.is(eax)); |
| 1609 | DCHECK(!divisor.is(eax)); |
| 1610 | DCHECK(!divisor.is(edx)); |
| 1611 | |
| 1612 | // Check for x / 0. |
| 1613 | if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) { |
| 1614 | __ test(divisor, divisor); |
| 1615 | DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero); |
| 1616 | } |
| 1617 | |
| 1618 | // Check for (0 / -x) that will produce negative zero. |
| 1619 | if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1620 | Label dividend_not_zero; |
| 1621 | __ test(dividend, dividend); |
| 1622 | __ j(not_zero, ÷nd_not_zero, Label::kNear); |
| 1623 | __ test(divisor, divisor); |
| 1624 | DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero); |
| 1625 | __ bind(÷nd_not_zero); |
| 1626 | } |
| 1627 | |
| 1628 | // Check for (kMinInt / -1). |
| 1629 | if (hdiv->CheckFlag(HValue::kCanOverflow)) { |
| 1630 | Label dividend_not_min_int; |
| 1631 | __ cmp(dividend, kMinInt); |
| 1632 | __ j(not_zero, ÷nd_not_min_int, Label::kNear); |
| 1633 | __ cmp(divisor, -1); |
| 1634 | DeoptimizeIf(zero, instr, Deoptimizer::kOverflow); |
| 1635 | __ bind(÷nd_not_min_int); |
| 1636 | } |
| 1637 | |
| 1638 | // Sign extend to edx (= remainder). |
| 1639 | __ cdq(); |
| 1640 | __ idiv(divisor); |
| 1641 | |
| 1642 | Label done; |
| 1643 | __ test(remainder, remainder); |
| 1644 | __ j(zero, &done, Label::kNear); |
| 1645 | __ xor_(remainder, divisor); |
| 1646 | __ sar(remainder, 31); |
| 1647 | __ add(result, remainder); |
| 1648 | __ bind(&done); |
| 1649 | } |
| 1650 | |
| 1651 | |
| 1652 | void LCodeGen::DoMulI(LMulI* instr) { |
| 1653 | Register left = ToRegister(instr->left()); |
| 1654 | LOperand* right = instr->right(); |
| 1655 | |
| 1656 | if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1657 | __ mov(ToRegister(instr->temp()), left); |
| 1658 | } |
| 1659 | |
| 1660 | if (right->IsConstantOperand()) { |
| 1661 | // Try strength reductions on the multiplication. |
| 1662 | // All replacement instructions are at most as long as the imul |
| 1663 | // and have better latency. |
| 1664 | int constant = ToInteger32(LConstantOperand::cast(right)); |
| 1665 | if (constant == -1) { |
| 1666 | __ neg(left); |
| 1667 | } else if (constant == 0) { |
| 1668 | __ xor_(left, Operand(left)); |
| 1669 | } else if (constant == 2) { |
| 1670 | __ add(left, Operand(left)); |
| 1671 | } else if (!instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| 1672 | // If we know that the multiplication can't overflow, it's safe to |
| 1673 | // use instructions that don't set the overflow flag for the |
| 1674 | // multiplication. |
| 1675 | switch (constant) { |
| 1676 | case 1: |
| 1677 | // Do nothing. |
| 1678 | break; |
| 1679 | case 3: |
| 1680 | __ lea(left, Operand(left, left, times_2, 0)); |
| 1681 | break; |
| 1682 | case 4: |
| 1683 | __ shl(left, 2); |
| 1684 | break; |
| 1685 | case 5: |
| 1686 | __ lea(left, Operand(left, left, times_4, 0)); |
| 1687 | break; |
| 1688 | case 8: |
| 1689 | __ shl(left, 3); |
| 1690 | break; |
| 1691 | case 9: |
| 1692 | __ lea(left, Operand(left, left, times_8, 0)); |
| 1693 | break; |
| 1694 | case 16: |
| 1695 | __ shl(left, 4); |
| 1696 | break; |
| 1697 | default: |
| 1698 | __ imul(left, left, constant); |
| 1699 | break; |
| 1700 | } |
| 1701 | } else { |
| 1702 | __ imul(left, left, constant); |
| 1703 | } |
| 1704 | } else { |
| 1705 | if (instr->hydrogen()->representation().IsSmi()) { |
| 1706 | __ SmiUntag(left); |
| 1707 | } |
| 1708 | __ imul(left, ToOperand(right)); |
| 1709 | } |
| 1710 | |
| 1711 | if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| 1712 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 1713 | } |
| 1714 | |
| 1715 | if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 1716 | // Bail out if the result is supposed to be negative zero. |
| 1717 | Label done; |
| 1718 | __ test(left, Operand(left)); |
| 1719 | __ j(not_zero, &done); |
| 1720 | if (right->IsConstantOperand()) { |
| 1721 | if (ToInteger32(LConstantOperand::cast(right)) < 0) { |
| 1722 | DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero); |
| 1723 | } else if (ToInteger32(LConstantOperand::cast(right)) == 0) { |
| 1724 | __ cmp(ToRegister(instr->temp()), Immediate(0)); |
| 1725 | DeoptimizeIf(less, instr, Deoptimizer::kMinusZero); |
| 1726 | } |
| 1727 | } else { |
| 1728 | // Test the non-zero operand for negative sign. |
| 1729 | __ or_(ToRegister(instr->temp()), ToOperand(right)); |
| 1730 | DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero); |
| 1731 | } |
| 1732 | __ bind(&done); |
| 1733 | } |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | void LCodeGen::DoBitI(LBitI* instr) { |
| 1738 | LOperand* left = instr->left(); |
| 1739 | LOperand* right = instr->right(); |
| 1740 | DCHECK(left->Equals(instr->result())); |
| 1741 | DCHECK(left->IsRegister()); |
| 1742 | |
| 1743 | if (right->IsConstantOperand()) { |
| 1744 | int32_t right_operand = |
| 1745 | ToRepresentation(LConstantOperand::cast(right), |
| 1746 | instr->hydrogen()->representation()); |
| 1747 | switch (instr->op()) { |
| 1748 | case Token::BIT_AND: |
| 1749 | __ and_(ToRegister(left), right_operand); |
| 1750 | break; |
| 1751 | case Token::BIT_OR: |
| 1752 | __ or_(ToRegister(left), right_operand); |
| 1753 | break; |
| 1754 | case Token::BIT_XOR: |
| 1755 | if (right_operand == int32_t(~0)) { |
| 1756 | __ not_(ToRegister(left)); |
| 1757 | } else { |
| 1758 | __ xor_(ToRegister(left), right_operand); |
| 1759 | } |
| 1760 | break; |
| 1761 | default: |
| 1762 | UNREACHABLE(); |
| 1763 | break; |
| 1764 | } |
| 1765 | } else { |
| 1766 | switch (instr->op()) { |
| 1767 | case Token::BIT_AND: |
| 1768 | __ and_(ToRegister(left), ToOperand(right)); |
| 1769 | break; |
| 1770 | case Token::BIT_OR: |
| 1771 | __ or_(ToRegister(left), ToOperand(right)); |
| 1772 | break; |
| 1773 | case Token::BIT_XOR: |
| 1774 | __ xor_(ToRegister(left), ToOperand(right)); |
| 1775 | break; |
| 1776 | default: |
| 1777 | UNREACHABLE(); |
| 1778 | break; |
| 1779 | } |
| 1780 | } |
| 1781 | } |
| 1782 | |
| 1783 | |
| 1784 | void LCodeGen::DoShiftI(LShiftI* instr) { |
| 1785 | LOperand* left = instr->left(); |
| 1786 | LOperand* right = instr->right(); |
| 1787 | DCHECK(left->Equals(instr->result())); |
| 1788 | DCHECK(left->IsRegister()); |
| 1789 | if (right->IsRegister()) { |
| 1790 | DCHECK(ToRegister(right).is(ecx)); |
| 1791 | |
| 1792 | switch (instr->op()) { |
| 1793 | case Token::ROR: |
| 1794 | __ ror_cl(ToRegister(left)); |
| 1795 | break; |
| 1796 | case Token::SAR: |
| 1797 | __ sar_cl(ToRegister(left)); |
| 1798 | break; |
| 1799 | case Token::SHR: |
| 1800 | __ shr_cl(ToRegister(left)); |
| 1801 | if (instr->can_deopt()) { |
| 1802 | __ test(ToRegister(left), ToRegister(left)); |
| 1803 | DeoptimizeIf(sign, instr, Deoptimizer::kNegativeValue); |
| 1804 | } |
| 1805 | break; |
| 1806 | case Token::SHL: |
| 1807 | __ shl_cl(ToRegister(left)); |
| 1808 | break; |
| 1809 | default: |
| 1810 | UNREACHABLE(); |
| 1811 | break; |
| 1812 | } |
| 1813 | } else { |
| 1814 | int value = ToInteger32(LConstantOperand::cast(right)); |
| 1815 | uint8_t shift_count = static_cast<uint8_t>(value & 0x1F); |
| 1816 | switch (instr->op()) { |
| 1817 | case Token::ROR: |
| 1818 | if (shift_count == 0 && instr->can_deopt()) { |
| 1819 | __ test(ToRegister(left), ToRegister(left)); |
| 1820 | DeoptimizeIf(sign, instr, Deoptimizer::kNegativeValue); |
| 1821 | } else { |
| 1822 | __ ror(ToRegister(left), shift_count); |
| 1823 | } |
| 1824 | break; |
| 1825 | case Token::SAR: |
| 1826 | if (shift_count != 0) { |
| 1827 | __ sar(ToRegister(left), shift_count); |
| 1828 | } |
| 1829 | break; |
| 1830 | case Token::SHR: |
| 1831 | if (shift_count != 0) { |
| 1832 | __ shr(ToRegister(left), shift_count); |
| 1833 | } else if (instr->can_deopt()) { |
| 1834 | __ test(ToRegister(left), ToRegister(left)); |
| 1835 | DeoptimizeIf(sign, instr, Deoptimizer::kNegativeValue); |
| 1836 | } |
| 1837 | break; |
| 1838 | case Token::SHL: |
| 1839 | if (shift_count != 0) { |
| 1840 | if (instr->hydrogen_value()->representation().IsSmi() && |
| 1841 | instr->can_deopt()) { |
| 1842 | if (shift_count != 1) { |
| 1843 | __ shl(ToRegister(left), shift_count - 1); |
| 1844 | } |
| 1845 | __ SmiTag(ToRegister(left)); |
| 1846 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 1847 | } else { |
| 1848 | __ shl(ToRegister(left), shift_count); |
| 1849 | } |
| 1850 | } |
| 1851 | break; |
| 1852 | default: |
| 1853 | UNREACHABLE(); |
| 1854 | break; |
| 1855 | } |
| 1856 | } |
| 1857 | } |
| 1858 | |
| 1859 | |
| 1860 | void LCodeGen::DoSubI(LSubI* instr) { |
| 1861 | LOperand* left = instr->left(); |
| 1862 | LOperand* right = instr->right(); |
| 1863 | DCHECK(left->Equals(instr->result())); |
| 1864 | |
| 1865 | if (right->IsConstantOperand()) { |
| 1866 | __ sub(ToOperand(left), |
| 1867 | ToImmediate(right, instr->hydrogen()->representation())); |
| 1868 | } else { |
| 1869 | __ sub(ToRegister(left), ToOperand(right)); |
| 1870 | } |
| 1871 | if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| 1872 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 1873 | } |
| 1874 | } |
| 1875 | |
| 1876 | |
| 1877 | void LCodeGen::DoConstantI(LConstantI* instr) { |
| 1878 | __ Move(ToRegister(instr->result()), Immediate(instr->value())); |
| 1879 | } |
| 1880 | |
| 1881 | |
| 1882 | void LCodeGen::DoConstantS(LConstantS* instr) { |
| 1883 | __ Move(ToRegister(instr->result()), Immediate(instr->value())); |
| 1884 | } |
| 1885 | |
| 1886 | |
| 1887 | void LCodeGen::DoConstantD(LConstantD* instr) { |
| 1888 | uint64_t const bits = instr->bits(); |
| 1889 | uint32_t const lower = static_cast<uint32_t>(bits); |
| 1890 | uint32_t const upper = static_cast<uint32_t>(bits >> 32); |
| 1891 | DCHECK(instr->result()->IsDoubleRegister()); |
| 1892 | |
| 1893 | __ push(Immediate(upper)); |
| 1894 | __ push(Immediate(lower)); |
| 1895 | X87Register reg = ToX87Register(instr->result()); |
| 1896 | X87Mov(reg, Operand(esp, 0)); |
| 1897 | __ add(Operand(esp), Immediate(kDoubleSize)); |
| 1898 | } |
| 1899 | |
| 1900 | |
| 1901 | void LCodeGen::DoConstantE(LConstantE* instr) { |
| 1902 | __ lea(ToRegister(instr->result()), Operand::StaticVariable(instr->value())); |
| 1903 | } |
| 1904 | |
| 1905 | |
| 1906 | void LCodeGen::DoConstantT(LConstantT* instr) { |
| 1907 | Register reg = ToRegister(instr->result()); |
| 1908 | Handle<Object> object = instr->value(isolate()); |
| 1909 | AllowDeferredHandleDereference smi_check; |
| 1910 | __ LoadObject(reg, object); |
| 1911 | } |
| 1912 | |
| 1913 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1914 | Operand LCodeGen::BuildSeqStringOperand(Register string, |
| 1915 | LOperand* index, |
| 1916 | String::Encoding encoding) { |
| 1917 | if (index->IsConstantOperand()) { |
| 1918 | int offset = ToRepresentation(LConstantOperand::cast(index), |
| 1919 | Representation::Integer32()); |
| 1920 | if (encoding == String::TWO_BYTE_ENCODING) { |
| 1921 | offset *= kUC16Size; |
| 1922 | } |
| 1923 | STATIC_ASSERT(kCharSize == 1); |
| 1924 | return FieldOperand(string, SeqString::kHeaderSize + offset); |
| 1925 | } |
| 1926 | return FieldOperand( |
| 1927 | string, ToRegister(index), |
| 1928 | encoding == String::ONE_BYTE_ENCODING ? times_1 : times_2, |
| 1929 | SeqString::kHeaderSize); |
| 1930 | } |
| 1931 | |
| 1932 | |
| 1933 | void LCodeGen::DoSeqStringGetChar(LSeqStringGetChar* instr) { |
| 1934 | String::Encoding encoding = instr->hydrogen()->encoding(); |
| 1935 | Register result = ToRegister(instr->result()); |
| 1936 | Register string = ToRegister(instr->string()); |
| 1937 | |
| 1938 | if (FLAG_debug_code) { |
| 1939 | __ push(string); |
| 1940 | __ mov(string, FieldOperand(string, HeapObject::kMapOffset)); |
| 1941 | __ movzx_b(string, FieldOperand(string, Map::kInstanceTypeOffset)); |
| 1942 | |
| 1943 | __ and_(string, Immediate(kStringRepresentationMask | kStringEncodingMask)); |
| 1944 | static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| 1945 | static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| 1946 | __ cmp(string, Immediate(encoding == String::ONE_BYTE_ENCODING |
| 1947 | ? one_byte_seq_type : two_byte_seq_type)); |
| 1948 | __ Check(equal, kUnexpectedStringType); |
| 1949 | __ pop(string); |
| 1950 | } |
| 1951 | |
| 1952 | Operand operand = BuildSeqStringOperand(string, instr->index(), encoding); |
| 1953 | if (encoding == String::ONE_BYTE_ENCODING) { |
| 1954 | __ movzx_b(result, operand); |
| 1955 | } else { |
| 1956 | __ movzx_w(result, operand); |
| 1957 | } |
| 1958 | } |
| 1959 | |
| 1960 | |
| 1961 | void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) { |
| 1962 | String::Encoding encoding = instr->hydrogen()->encoding(); |
| 1963 | Register string = ToRegister(instr->string()); |
| 1964 | |
| 1965 | if (FLAG_debug_code) { |
| 1966 | Register value = ToRegister(instr->value()); |
| 1967 | Register index = ToRegister(instr->index()); |
| 1968 | static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| 1969 | static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| 1970 | int encoding_mask = |
| 1971 | instr->hydrogen()->encoding() == String::ONE_BYTE_ENCODING |
| 1972 | ? one_byte_seq_type : two_byte_seq_type; |
| 1973 | __ EmitSeqStringSetCharCheck(string, index, value, encoding_mask); |
| 1974 | } |
| 1975 | |
| 1976 | Operand operand = BuildSeqStringOperand(string, instr->index(), encoding); |
| 1977 | if (instr->value()->IsConstantOperand()) { |
| 1978 | int value = ToRepresentation(LConstantOperand::cast(instr->value()), |
| 1979 | Representation::Integer32()); |
| 1980 | DCHECK_LE(0, value); |
| 1981 | if (encoding == String::ONE_BYTE_ENCODING) { |
| 1982 | DCHECK_LE(value, String::kMaxOneByteCharCode); |
| 1983 | __ mov_b(operand, static_cast<int8_t>(value)); |
| 1984 | } else { |
| 1985 | DCHECK_LE(value, String::kMaxUtf16CodeUnit); |
| 1986 | __ mov_w(operand, static_cast<int16_t>(value)); |
| 1987 | } |
| 1988 | } else { |
| 1989 | Register value = ToRegister(instr->value()); |
| 1990 | if (encoding == String::ONE_BYTE_ENCODING) { |
| 1991 | __ mov_b(operand, value); |
| 1992 | } else { |
| 1993 | __ mov_w(operand, value); |
| 1994 | } |
| 1995 | } |
| 1996 | } |
| 1997 | |
| 1998 | |
| 1999 | void LCodeGen::DoAddI(LAddI* instr) { |
| 2000 | LOperand* left = instr->left(); |
| 2001 | LOperand* right = instr->right(); |
| 2002 | |
| 2003 | if (LAddI::UseLea(instr->hydrogen()) && !left->Equals(instr->result())) { |
| 2004 | if (right->IsConstantOperand()) { |
| 2005 | int32_t offset = ToRepresentation(LConstantOperand::cast(right), |
| 2006 | instr->hydrogen()->representation()); |
| 2007 | __ lea(ToRegister(instr->result()), MemOperand(ToRegister(left), offset)); |
| 2008 | } else { |
| 2009 | Operand address(ToRegister(left), ToRegister(right), times_1, 0); |
| 2010 | __ lea(ToRegister(instr->result()), address); |
| 2011 | } |
| 2012 | } else { |
| 2013 | if (right->IsConstantOperand()) { |
| 2014 | __ add(ToOperand(left), |
| 2015 | ToImmediate(right, instr->hydrogen()->representation())); |
| 2016 | } else { |
| 2017 | __ add(ToRegister(left), ToOperand(right)); |
| 2018 | } |
| 2019 | if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| 2020 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 2021 | } |
| 2022 | } |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | void LCodeGen::DoMathMinMax(LMathMinMax* instr) { |
| 2027 | LOperand* left = instr->left(); |
| 2028 | LOperand* right = instr->right(); |
| 2029 | DCHECK(left->Equals(instr->result())); |
| 2030 | HMathMinMax::Operation operation = instr->hydrogen()->operation(); |
| 2031 | if (instr->hydrogen()->representation().IsSmiOrInteger32()) { |
| 2032 | Label return_left; |
| 2033 | Condition condition = (operation == HMathMinMax::kMathMin) |
| 2034 | ? less_equal |
| 2035 | : greater_equal; |
| 2036 | if (right->IsConstantOperand()) { |
| 2037 | Operand left_op = ToOperand(left); |
| 2038 | Immediate immediate = ToImmediate(LConstantOperand::cast(instr->right()), |
| 2039 | instr->hydrogen()->representation()); |
| 2040 | __ cmp(left_op, immediate); |
| 2041 | __ j(condition, &return_left, Label::kNear); |
| 2042 | __ mov(left_op, immediate); |
| 2043 | } else { |
| 2044 | Register left_reg = ToRegister(left); |
| 2045 | Operand right_op = ToOperand(right); |
| 2046 | __ cmp(left_reg, right_op); |
| 2047 | __ j(condition, &return_left, Label::kNear); |
| 2048 | __ mov(left_reg, right_op); |
| 2049 | } |
| 2050 | __ bind(&return_left); |
| 2051 | } else { |
| 2052 | DCHECK(instr->hydrogen()->representation().IsDouble()); |
| 2053 | Label check_nan_left, check_zero, return_left, return_right; |
| 2054 | Condition condition = (operation == HMathMinMax::kMathMin) ? below : above; |
| 2055 | X87Register left_reg = ToX87Register(left); |
| 2056 | X87Register right_reg = ToX87Register(right); |
| 2057 | |
| 2058 | X87PrepareBinaryOp(left_reg, right_reg, ToX87Register(instr->result())); |
| 2059 | __ fld(1); |
| 2060 | __ fld(1); |
| 2061 | __ FCmp(); |
| 2062 | __ j(parity_even, &check_nan_left, Label::kNear); // At least one NaN. |
| 2063 | __ j(equal, &check_zero, Label::kNear); // left == right. |
| 2064 | __ j(condition, &return_left, Label::kNear); |
| 2065 | __ jmp(&return_right, Label::kNear); |
| 2066 | |
| 2067 | __ bind(&check_zero); |
| 2068 | __ fld(0); |
| 2069 | __ fldz(); |
| 2070 | __ FCmp(); |
| 2071 | __ j(not_equal, &return_left, Label::kNear); // left == right != 0. |
| 2072 | // At this point, both left and right are either 0 or -0. |
| 2073 | if (operation == HMathMinMax::kMathMin) { |
| 2074 | // Push st0 and st1 to stack, then pop them to temp registers and OR them, |
| 2075 | // load it to left. |
| 2076 | Register scratch_reg = ToRegister(instr->temp()); |
| 2077 | __ fld(1); |
| 2078 | __ fld(1); |
| 2079 | __ sub(esp, Immediate(2 * kPointerSize)); |
| 2080 | __ fstp_s(MemOperand(esp, 0)); |
| 2081 | __ fstp_s(MemOperand(esp, kPointerSize)); |
| 2082 | __ pop(scratch_reg); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2083 | __ or_(MemOperand(esp, 0), scratch_reg); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2084 | X87Mov(left_reg, MemOperand(esp, 0), kX87FloatOperand); |
| 2085 | __ pop(scratch_reg); // restore esp |
| 2086 | } else { |
| 2087 | // Since we operate on +0 and/or -0, addsd and andsd have the same effect. |
| 2088 | X87Fxch(left_reg); |
| 2089 | __ fadd(1); |
| 2090 | } |
| 2091 | __ jmp(&return_left, Label::kNear); |
| 2092 | |
| 2093 | __ bind(&check_nan_left); |
| 2094 | __ fld(0); |
| 2095 | __ fld(0); |
| 2096 | __ FCmp(); // NaN check. |
| 2097 | __ j(parity_even, &return_left, Label::kNear); // left == NaN. |
| 2098 | |
| 2099 | __ bind(&return_right); |
| 2100 | X87Fxch(left_reg); |
| 2101 | X87Mov(left_reg, right_reg); |
| 2102 | |
| 2103 | __ bind(&return_left); |
| 2104 | } |
| 2105 | } |
| 2106 | |
| 2107 | |
| 2108 | void LCodeGen::DoArithmeticD(LArithmeticD* instr) { |
| 2109 | X87Register left = ToX87Register(instr->left()); |
| 2110 | X87Register right = ToX87Register(instr->right()); |
| 2111 | X87Register result = ToX87Register(instr->result()); |
| 2112 | if (instr->op() != Token::MOD) { |
| 2113 | X87PrepareBinaryOp(left, right, result); |
| 2114 | } |
| 2115 | // Set the precision control to double-precision. |
| 2116 | __ X87SetFPUCW(0x027F); |
| 2117 | switch (instr->op()) { |
| 2118 | case Token::ADD: |
| 2119 | __ fadd_i(1); |
| 2120 | break; |
| 2121 | case Token::SUB: |
| 2122 | __ fsub_i(1); |
| 2123 | break; |
| 2124 | case Token::MUL: |
| 2125 | __ fmul_i(1); |
| 2126 | break; |
| 2127 | case Token::DIV: |
| 2128 | __ fdiv_i(1); |
| 2129 | break; |
| 2130 | case Token::MOD: { |
| 2131 | // Pass two doubles as arguments on the stack. |
| 2132 | __ PrepareCallCFunction(4, eax); |
| 2133 | X87Mov(Operand(esp, 1 * kDoubleSize), right); |
| 2134 | X87Mov(Operand(esp, 0), left); |
| 2135 | X87Free(right); |
| 2136 | DCHECK(left.is(result)); |
| 2137 | X87PrepareToWrite(result); |
| 2138 | __ CallCFunction( |
| 2139 | ExternalReference::mod_two_doubles_operation(isolate()), |
| 2140 | 4); |
| 2141 | |
| 2142 | // Return value is in st(0) on ia32. |
| 2143 | X87CommitWrite(result); |
| 2144 | break; |
| 2145 | } |
| 2146 | default: |
| 2147 | UNREACHABLE(); |
| 2148 | break; |
| 2149 | } |
| 2150 | |
| 2151 | // Restore the default value of control word. |
| 2152 | __ X87SetFPUCW(0x037F); |
| 2153 | } |
| 2154 | |
| 2155 | |
| 2156 | void LCodeGen::DoArithmeticT(LArithmeticT* instr) { |
| 2157 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 2158 | DCHECK(ToRegister(instr->left()).is(edx)); |
| 2159 | DCHECK(ToRegister(instr->right()).is(eax)); |
| 2160 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 2161 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2162 | Handle<Code> code = CodeFactory::BinaryOpIC(isolate(), instr->op()).code(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2163 | CallCode(code, RelocInfo::CODE_TARGET, instr); |
| 2164 | } |
| 2165 | |
| 2166 | |
| 2167 | template<class InstrType> |
| 2168 | void LCodeGen::EmitBranch(InstrType instr, Condition cc) { |
| 2169 | int left_block = instr->TrueDestination(chunk_); |
| 2170 | int right_block = instr->FalseDestination(chunk_); |
| 2171 | |
| 2172 | int next_block = GetNextEmittedBlock(); |
| 2173 | |
| 2174 | if (right_block == left_block || cc == no_condition) { |
| 2175 | EmitGoto(left_block); |
| 2176 | } else if (left_block == next_block) { |
| 2177 | __ j(NegateCondition(cc), chunk_->GetAssemblyLabel(right_block)); |
| 2178 | } else if (right_block == next_block) { |
| 2179 | __ j(cc, chunk_->GetAssemblyLabel(left_block)); |
| 2180 | } else { |
| 2181 | __ j(cc, chunk_->GetAssemblyLabel(left_block)); |
| 2182 | __ jmp(chunk_->GetAssemblyLabel(right_block)); |
| 2183 | } |
| 2184 | } |
| 2185 | |
| 2186 | |
| 2187 | template <class InstrType> |
| 2188 | void LCodeGen::EmitTrueBranch(InstrType instr, Condition cc) { |
| 2189 | int true_block = instr->TrueDestination(chunk_); |
| 2190 | if (cc == no_condition) { |
| 2191 | __ jmp(chunk_->GetAssemblyLabel(true_block)); |
| 2192 | } else { |
| 2193 | __ j(cc, chunk_->GetAssemblyLabel(true_block)); |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | |
| 2198 | template<class InstrType> |
| 2199 | void LCodeGen::EmitFalseBranch(InstrType instr, Condition cc) { |
| 2200 | int false_block = instr->FalseDestination(chunk_); |
| 2201 | if (cc == no_condition) { |
| 2202 | __ jmp(chunk_->GetAssemblyLabel(false_block)); |
| 2203 | } else { |
| 2204 | __ j(cc, chunk_->GetAssemblyLabel(false_block)); |
| 2205 | } |
| 2206 | } |
| 2207 | |
| 2208 | |
| 2209 | void LCodeGen::DoBranch(LBranch* instr) { |
| 2210 | Representation r = instr->hydrogen()->value()->representation(); |
| 2211 | if (r.IsSmiOrInteger32()) { |
| 2212 | Register reg = ToRegister(instr->value()); |
| 2213 | __ test(reg, Operand(reg)); |
| 2214 | EmitBranch(instr, not_zero); |
| 2215 | } else if (r.IsDouble()) { |
| 2216 | X87Register reg = ToX87Register(instr->value()); |
| 2217 | X87LoadForUsage(reg); |
| 2218 | __ fldz(); |
| 2219 | __ FCmp(); |
| 2220 | EmitBranch(instr, not_zero); |
| 2221 | } else { |
| 2222 | DCHECK(r.IsTagged()); |
| 2223 | Register reg = ToRegister(instr->value()); |
| 2224 | HType type = instr->hydrogen()->value()->type(); |
| 2225 | if (type.IsBoolean()) { |
| 2226 | DCHECK(!info()->IsStub()); |
| 2227 | __ cmp(reg, factory()->true_value()); |
| 2228 | EmitBranch(instr, equal); |
| 2229 | } else if (type.IsSmi()) { |
| 2230 | DCHECK(!info()->IsStub()); |
| 2231 | __ test(reg, Operand(reg)); |
| 2232 | EmitBranch(instr, not_equal); |
| 2233 | } else if (type.IsJSArray()) { |
| 2234 | DCHECK(!info()->IsStub()); |
| 2235 | EmitBranch(instr, no_condition); |
| 2236 | } else if (type.IsHeapNumber()) { |
| 2237 | UNREACHABLE(); |
| 2238 | } else if (type.IsString()) { |
| 2239 | DCHECK(!info()->IsStub()); |
| 2240 | __ cmp(FieldOperand(reg, String::kLengthOffset), Immediate(0)); |
| 2241 | EmitBranch(instr, not_equal); |
| 2242 | } else { |
| 2243 | ToBooleanStub::Types expected = instr->hydrogen()->expected_input_types(); |
| 2244 | if (expected.IsEmpty()) expected = ToBooleanStub::Types::Generic(); |
| 2245 | |
| 2246 | if (expected.Contains(ToBooleanStub::UNDEFINED)) { |
| 2247 | // undefined -> false. |
| 2248 | __ cmp(reg, factory()->undefined_value()); |
| 2249 | __ j(equal, instr->FalseLabel(chunk_)); |
| 2250 | } |
| 2251 | if (expected.Contains(ToBooleanStub::BOOLEAN)) { |
| 2252 | // true -> true. |
| 2253 | __ cmp(reg, factory()->true_value()); |
| 2254 | __ j(equal, instr->TrueLabel(chunk_)); |
| 2255 | // false -> false. |
| 2256 | __ cmp(reg, factory()->false_value()); |
| 2257 | __ j(equal, instr->FalseLabel(chunk_)); |
| 2258 | } |
| 2259 | if (expected.Contains(ToBooleanStub::NULL_TYPE)) { |
| 2260 | // 'null' -> false. |
| 2261 | __ cmp(reg, factory()->null_value()); |
| 2262 | __ j(equal, instr->FalseLabel(chunk_)); |
| 2263 | } |
| 2264 | |
| 2265 | if (expected.Contains(ToBooleanStub::SMI)) { |
| 2266 | // Smis: 0 -> false, all other -> true. |
| 2267 | __ test(reg, Operand(reg)); |
| 2268 | __ j(equal, instr->FalseLabel(chunk_)); |
| 2269 | __ JumpIfSmi(reg, instr->TrueLabel(chunk_)); |
| 2270 | } else if (expected.NeedsMap()) { |
| 2271 | // If we need a map later and have a Smi -> deopt. |
| 2272 | __ test(reg, Immediate(kSmiTagMask)); |
| 2273 | DeoptimizeIf(zero, instr, Deoptimizer::kSmi); |
| 2274 | } |
| 2275 | |
| 2276 | Register map = no_reg; // Keep the compiler happy. |
| 2277 | if (expected.NeedsMap()) { |
| 2278 | map = ToRegister(instr->temp()); |
| 2279 | DCHECK(!map.is(reg)); |
| 2280 | __ mov(map, FieldOperand(reg, HeapObject::kMapOffset)); |
| 2281 | |
| 2282 | if (expected.CanBeUndetectable()) { |
| 2283 | // Undetectable -> false. |
| 2284 | __ test_b(FieldOperand(map, Map::kBitFieldOffset), |
| 2285 | 1 << Map::kIsUndetectable); |
| 2286 | __ j(not_zero, instr->FalseLabel(chunk_)); |
| 2287 | } |
| 2288 | } |
| 2289 | |
| 2290 | if (expected.Contains(ToBooleanStub::SPEC_OBJECT)) { |
| 2291 | // spec object -> true. |
| 2292 | __ CmpInstanceType(map, FIRST_JS_RECEIVER_TYPE); |
| 2293 | __ j(above_equal, instr->TrueLabel(chunk_)); |
| 2294 | } |
| 2295 | |
| 2296 | if (expected.Contains(ToBooleanStub::STRING)) { |
| 2297 | // String value -> false iff empty. |
| 2298 | Label not_string; |
| 2299 | __ CmpInstanceType(map, FIRST_NONSTRING_TYPE); |
| 2300 | __ j(above_equal, ¬_string, Label::kNear); |
| 2301 | __ cmp(FieldOperand(reg, String::kLengthOffset), Immediate(0)); |
| 2302 | __ j(not_zero, instr->TrueLabel(chunk_)); |
| 2303 | __ jmp(instr->FalseLabel(chunk_)); |
| 2304 | __ bind(¬_string); |
| 2305 | } |
| 2306 | |
| 2307 | if (expected.Contains(ToBooleanStub::SYMBOL)) { |
| 2308 | // Symbol value -> true. |
| 2309 | __ CmpInstanceType(map, SYMBOL_TYPE); |
| 2310 | __ j(equal, instr->TrueLabel(chunk_)); |
| 2311 | } |
| 2312 | |
| 2313 | if (expected.Contains(ToBooleanStub::SIMD_VALUE)) { |
| 2314 | // SIMD value -> true. |
| 2315 | __ CmpInstanceType(map, SIMD128_VALUE_TYPE); |
| 2316 | __ j(equal, instr->TrueLabel(chunk_)); |
| 2317 | } |
| 2318 | |
| 2319 | if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) { |
| 2320 | // heap number -> false iff +0, -0, or NaN. |
| 2321 | Label not_heap_number; |
| 2322 | __ cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| 2323 | factory()->heap_number_map()); |
| 2324 | __ j(not_equal, ¬_heap_number, Label::kNear); |
| 2325 | __ fldz(); |
| 2326 | __ fld_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| 2327 | __ FCmp(); |
| 2328 | __ j(zero, instr->FalseLabel(chunk_)); |
| 2329 | __ jmp(instr->TrueLabel(chunk_)); |
| 2330 | __ bind(¬_heap_number); |
| 2331 | } |
| 2332 | |
| 2333 | if (!expected.IsGeneric()) { |
| 2334 | // We've seen something for the first time -> deopt. |
| 2335 | // This can only happen if we are not generic already. |
| 2336 | DeoptimizeIf(no_condition, instr, Deoptimizer::kUnexpectedObject); |
| 2337 | } |
| 2338 | } |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | |
| 2343 | void LCodeGen::EmitGoto(int block) { |
| 2344 | if (!IsNextEmittedBlock(block)) { |
| 2345 | __ jmp(chunk_->GetAssemblyLabel(LookupDestination(block))); |
| 2346 | } |
| 2347 | } |
| 2348 | |
| 2349 | |
| 2350 | void LCodeGen::DoClobberDoubles(LClobberDoubles* instr) { |
| 2351 | } |
| 2352 | |
| 2353 | |
| 2354 | void LCodeGen::DoGoto(LGoto* instr) { |
| 2355 | EmitGoto(instr->block_id()); |
| 2356 | } |
| 2357 | |
| 2358 | |
| 2359 | Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) { |
| 2360 | Condition cond = no_condition; |
| 2361 | switch (op) { |
| 2362 | case Token::EQ: |
| 2363 | case Token::EQ_STRICT: |
| 2364 | cond = equal; |
| 2365 | break; |
| 2366 | case Token::NE: |
| 2367 | case Token::NE_STRICT: |
| 2368 | cond = not_equal; |
| 2369 | break; |
| 2370 | case Token::LT: |
| 2371 | cond = is_unsigned ? below : less; |
| 2372 | break; |
| 2373 | case Token::GT: |
| 2374 | cond = is_unsigned ? above : greater; |
| 2375 | break; |
| 2376 | case Token::LTE: |
| 2377 | cond = is_unsigned ? below_equal : less_equal; |
| 2378 | break; |
| 2379 | case Token::GTE: |
| 2380 | cond = is_unsigned ? above_equal : greater_equal; |
| 2381 | break; |
| 2382 | case Token::IN: |
| 2383 | case Token::INSTANCEOF: |
| 2384 | default: |
| 2385 | UNREACHABLE(); |
| 2386 | } |
| 2387 | return cond; |
| 2388 | } |
| 2389 | |
| 2390 | |
| 2391 | void LCodeGen::DoCompareNumericAndBranch(LCompareNumericAndBranch* instr) { |
| 2392 | LOperand* left = instr->left(); |
| 2393 | LOperand* right = instr->right(); |
| 2394 | bool is_unsigned = |
| 2395 | instr->is_double() || |
| 2396 | instr->hydrogen()->left()->CheckFlag(HInstruction::kUint32) || |
| 2397 | instr->hydrogen()->right()->CheckFlag(HInstruction::kUint32); |
| 2398 | Condition cc = TokenToCondition(instr->op(), is_unsigned); |
| 2399 | |
| 2400 | if (left->IsConstantOperand() && right->IsConstantOperand()) { |
| 2401 | // We can statically evaluate the comparison. |
| 2402 | double left_val = ToDouble(LConstantOperand::cast(left)); |
| 2403 | double right_val = ToDouble(LConstantOperand::cast(right)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2404 | int next_block = Token::EvalComparison(instr->op(), left_val, right_val) |
| 2405 | ? instr->TrueDestination(chunk_) |
| 2406 | : instr->FalseDestination(chunk_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2407 | EmitGoto(next_block); |
| 2408 | } else { |
| 2409 | if (instr->is_double()) { |
| 2410 | X87LoadForUsage(ToX87Register(right), ToX87Register(left)); |
| 2411 | __ FCmp(); |
| 2412 | // Don't base result on EFLAGS when a NaN is involved. Instead |
| 2413 | // jump to the false block. |
| 2414 | __ j(parity_even, instr->FalseLabel(chunk_)); |
| 2415 | } else { |
| 2416 | if (right->IsConstantOperand()) { |
| 2417 | __ cmp(ToOperand(left), |
| 2418 | ToImmediate(right, instr->hydrogen()->representation())); |
| 2419 | } else if (left->IsConstantOperand()) { |
| 2420 | __ cmp(ToOperand(right), |
| 2421 | ToImmediate(left, instr->hydrogen()->representation())); |
| 2422 | // We commuted the operands, so commute the condition. |
| 2423 | cc = CommuteCondition(cc); |
| 2424 | } else { |
| 2425 | __ cmp(ToRegister(left), ToOperand(right)); |
| 2426 | } |
| 2427 | } |
| 2428 | EmitBranch(instr, cc); |
| 2429 | } |
| 2430 | } |
| 2431 | |
| 2432 | |
| 2433 | void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) { |
| 2434 | Register left = ToRegister(instr->left()); |
| 2435 | |
| 2436 | if (instr->right()->IsConstantOperand()) { |
| 2437 | Handle<Object> right = ToHandle(LConstantOperand::cast(instr->right())); |
| 2438 | __ CmpObject(left, right); |
| 2439 | } else { |
| 2440 | Operand right = ToOperand(instr->right()); |
| 2441 | __ cmp(left, right); |
| 2442 | } |
| 2443 | EmitBranch(instr, equal); |
| 2444 | } |
| 2445 | |
| 2446 | |
| 2447 | void LCodeGen::DoCmpHoleAndBranch(LCmpHoleAndBranch* instr) { |
| 2448 | if (instr->hydrogen()->representation().IsTagged()) { |
| 2449 | Register input_reg = ToRegister(instr->object()); |
| 2450 | __ cmp(input_reg, factory()->the_hole_value()); |
| 2451 | EmitBranch(instr, equal); |
| 2452 | return; |
| 2453 | } |
| 2454 | |
| 2455 | // Put the value to the top of stack |
| 2456 | X87Register src = ToX87Register(instr->object()); |
| 2457 | X87LoadForUsage(src); |
| 2458 | __ fld(0); |
| 2459 | __ fld(0); |
| 2460 | __ FCmp(); |
| 2461 | Label ok; |
| 2462 | __ j(parity_even, &ok, Label::kNear); |
| 2463 | __ fstp(0); |
| 2464 | EmitFalseBranch(instr, no_condition); |
| 2465 | __ bind(&ok); |
| 2466 | |
| 2467 | |
| 2468 | __ sub(esp, Immediate(kDoubleSize)); |
| 2469 | __ fstp_d(MemOperand(esp, 0)); |
| 2470 | |
| 2471 | __ add(esp, Immediate(kDoubleSize)); |
| 2472 | int offset = sizeof(kHoleNanUpper32); |
| 2473 | // x87 converts sNaN(0xfff7fffffff7ffff) to QNaN(0xfffffffffff7ffff), |
| 2474 | // so we check the upper with 0xffffffff for hole as a temporary fix. |
| 2475 | __ cmp(MemOperand(esp, -offset), Immediate(0xffffffff)); |
| 2476 | EmitBranch(instr, equal); |
| 2477 | } |
| 2478 | |
| 2479 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2480 | Condition LCodeGen::EmitIsString(Register input, |
| 2481 | Register temp1, |
| 2482 | Label* is_not_string, |
| 2483 | SmiCheck check_needed = INLINE_SMI_CHECK) { |
| 2484 | if (check_needed == INLINE_SMI_CHECK) { |
| 2485 | __ JumpIfSmi(input, is_not_string); |
| 2486 | } |
| 2487 | |
| 2488 | Condition cond = masm_->IsObjectStringType(input, temp1, temp1); |
| 2489 | |
| 2490 | return cond; |
| 2491 | } |
| 2492 | |
| 2493 | |
| 2494 | void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) { |
| 2495 | Register reg = ToRegister(instr->value()); |
| 2496 | Register temp = ToRegister(instr->temp()); |
| 2497 | |
| 2498 | SmiCheck check_needed = |
| 2499 | instr->hydrogen()->value()->type().IsHeapObject() |
| 2500 | ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| 2501 | |
| 2502 | Condition true_cond = EmitIsString( |
| 2503 | reg, temp, instr->FalseLabel(chunk_), check_needed); |
| 2504 | |
| 2505 | EmitBranch(instr, true_cond); |
| 2506 | } |
| 2507 | |
| 2508 | |
| 2509 | void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) { |
| 2510 | Operand input = ToOperand(instr->value()); |
| 2511 | |
| 2512 | __ test(input, Immediate(kSmiTagMask)); |
| 2513 | EmitBranch(instr, zero); |
| 2514 | } |
| 2515 | |
| 2516 | |
| 2517 | void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) { |
| 2518 | Register input = ToRegister(instr->value()); |
| 2519 | Register temp = ToRegister(instr->temp()); |
| 2520 | |
| 2521 | if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| 2522 | STATIC_ASSERT(kSmiTag == 0); |
| 2523 | __ JumpIfSmi(input, instr->FalseLabel(chunk_)); |
| 2524 | } |
| 2525 | __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| 2526 | __ test_b(FieldOperand(temp, Map::kBitFieldOffset), |
| 2527 | 1 << Map::kIsUndetectable); |
| 2528 | EmitBranch(instr, not_zero); |
| 2529 | } |
| 2530 | |
| 2531 | |
| 2532 | static Condition ComputeCompareCondition(Token::Value op) { |
| 2533 | switch (op) { |
| 2534 | case Token::EQ_STRICT: |
| 2535 | case Token::EQ: |
| 2536 | return equal; |
| 2537 | case Token::LT: |
| 2538 | return less; |
| 2539 | case Token::GT: |
| 2540 | return greater; |
| 2541 | case Token::LTE: |
| 2542 | return less_equal; |
| 2543 | case Token::GTE: |
| 2544 | return greater_equal; |
| 2545 | default: |
| 2546 | UNREACHABLE(); |
| 2547 | return no_condition; |
| 2548 | } |
| 2549 | } |
| 2550 | |
| 2551 | |
| 2552 | void LCodeGen::DoStringCompareAndBranch(LStringCompareAndBranch* instr) { |
| 2553 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 2554 | DCHECK(ToRegister(instr->left()).is(edx)); |
| 2555 | DCHECK(ToRegister(instr->right()).is(eax)); |
| 2556 | |
| 2557 | Handle<Code> code = CodeFactory::StringCompare(isolate()).code(); |
| 2558 | CallCode(code, RelocInfo::CODE_TARGET, instr); |
| 2559 | __ test(eax, eax); |
| 2560 | |
| 2561 | EmitBranch(instr, ComputeCompareCondition(instr->op())); |
| 2562 | } |
| 2563 | |
| 2564 | |
| 2565 | static InstanceType TestType(HHasInstanceTypeAndBranch* instr) { |
| 2566 | InstanceType from = instr->from(); |
| 2567 | InstanceType to = instr->to(); |
| 2568 | if (from == FIRST_TYPE) return to; |
| 2569 | DCHECK(from == to || to == LAST_TYPE); |
| 2570 | return from; |
| 2571 | } |
| 2572 | |
| 2573 | |
| 2574 | static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) { |
| 2575 | InstanceType from = instr->from(); |
| 2576 | InstanceType to = instr->to(); |
| 2577 | if (from == to) return equal; |
| 2578 | if (to == LAST_TYPE) return above_equal; |
| 2579 | if (from == FIRST_TYPE) return below_equal; |
| 2580 | UNREACHABLE(); |
| 2581 | return equal; |
| 2582 | } |
| 2583 | |
| 2584 | |
| 2585 | void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) { |
| 2586 | Register input = ToRegister(instr->value()); |
| 2587 | Register temp = ToRegister(instr->temp()); |
| 2588 | |
| 2589 | if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| 2590 | __ JumpIfSmi(input, instr->FalseLabel(chunk_)); |
| 2591 | } |
| 2592 | |
| 2593 | __ CmpObjectType(input, TestType(instr->hydrogen()), temp); |
| 2594 | EmitBranch(instr, BranchCondition(instr->hydrogen())); |
| 2595 | } |
| 2596 | |
| 2597 | |
| 2598 | void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) { |
| 2599 | Register input = ToRegister(instr->value()); |
| 2600 | Register result = ToRegister(instr->result()); |
| 2601 | |
| 2602 | __ AssertString(input); |
| 2603 | |
| 2604 | __ mov(result, FieldOperand(input, String::kHashFieldOffset)); |
| 2605 | __ IndexFromHash(result, result); |
| 2606 | } |
| 2607 | |
| 2608 | |
| 2609 | void LCodeGen::DoHasCachedArrayIndexAndBranch( |
| 2610 | LHasCachedArrayIndexAndBranch* instr) { |
| 2611 | Register input = ToRegister(instr->value()); |
| 2612 | |
| 2613 | __ test(FieldOperand(input, String::kHashFieldOffset), |
| 2614 | Immediate(String::kContainsCachedArrayIndexMask)); |
| 2615 | EmitBranch(instr, equal); |
| 2616 | } |
| 2617 | |
| 2618 | |
| 2619 | // Branches to a label or falls through with the answer in the z flag. Trashes |
| 2620 | // the temp registers, but not the input. |
| 2621 | void LCodeGen::EmitClassOfTest(Label* is_true, |
| 2622 | Label* is_false, |
| 2623 | Handle<String>class_name, |
| 2624 | Register input, |
| 2625 | Register temp, |
| 2626 | Register temp2) { |
| 2627 | DCHECK(!input.is(temp)); |
| 2628 | DCHECK(!input.is(temp2)); |
| 2629 | DCHECK(!temp.is(temp2)); |
| 2630 | __ JumpIfSmi(input, is_false); |
| 2631 | |
| 2632 | __ CmpObjectType(input, JS_FUNCTION_TYPE, temp); |
| 2633 | if (String::Equals(isolate()->factory()->Function_string(), class_name)) { |
| 2634 | __ j(equal, is_true); |
| 2635 | } else { |
| 2636 | __ j(equal, is_false); |
| 2637 | } |
| 2638 | |
| 2639 | // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
| 2640 | // Check if the constructor in the map is a function. |
| 2641 | __ GetMapConstructor(temp, temp, temp2); |
| 2642 | // Objects with a non-function constructor have class 'Object'. |
| 2643 | __ CmpInstanceType(temp2, JS_FUNCTION_TYPE); |
| 2644 | if (String::Equals(class_name, isolate()->factory()->Object_string())) { |
| 2645 | __ j(not_equal, is_true); |
| 2646 | } else { |
| 2647 | __ j(not_equal, is_false); |
| 2648 | } |
| 2649 | |
| 2650 | // temp now contains the constructor function. Grab the |
| 2651 | // instance class name from there. |
| 2652 | __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
| 2653 | __ mov(temp, FieldOperand(temp, |
| 2654 | SharedFunctionInfo::kInstanceClassNameOffset)); |
| 2655 | // The class name we are testing against is internalized since it's a literal. |
| 2656 | // The name in the constructor is internalized because of the way the context |
| 2657 | // is booted. This routine isn't expected to work for random API-created |
| 2658 | // classes and it doesn't have to because you can't access it with natives |
| 2659 | // syntax. Since both sides are internalized it is sufficient to use an |
| 2660 | // identity comparison. |
| 2661 | __ cmp(temp, class_name); |
| 2662 | // End with the answer in the z flag. |
| 2663 | } |
| 2664 | |
| 2665 | |
| 2666 | void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) { |
| 2667 | Register input = ToRegister(instr->value()); |
| 2668 | Register temp = ToRegister(instr->temp()); |
| 2669 | Register temp2 = ToRegister(instr->temp2()); |
| 2670 | |
| 2671 | Handle<String> class_name = instr->hydrogen()->class_name(); |
| 2672 | |
| 2673 | EmitClassOfTest(instr->TrueLabel(chunk_), instr->FalseLabel(chunk_), |
| 2674 | class_name, input, temp, temp2); |
| 2675 | |
| 2676 | EmitBranch(instr, equal); |
| 2677 | } |
| 2678 | |
| 2679 | |
| 2680 | void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) { |
| 2681 | Register reg = ToRegister(instr->value()); |
| 2682 | __ cmp(FieldOperand(reg, HeapObject::kMapOffset), instr->map()); |
| 2683 | EmitBranch(instr, equal); |
| 2684 | } |
| 2685 | |
| 2686 | |
| 2687 | void LCodeGen::DoInstanceOf(LInstanceOf* instr) { |
| 2688 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 2689 | DCHECK(ToRegister(instr->left()).is(InstanceOfDescriptor::LeftRegister())); |
| 2690 | DCHECK(ToRegister(instr->right()).is(InstanceOfDescriptor::RightRegister())); |
| 2691 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 2692 | InstanceOfStub stub(isolate()); |
| 2693 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 2694 | } |
| 2695 | |
| 2696 | |
| 2697 | void LCodeGen::DoHasInPrototypeChainAndBranch( |
| 2698 | LHasInPrototypeChainAndBranch* instr) { |
| 2699 | Register const object = ToRegister(instr->object()); |
| 2700 | Register const object_map = ToRegister(instr->scratch()); |
| 2701 | Register const object_prototype = object_map; |
| 2702 | Register const prototype = ToRegister(instr->prototype()); |
| 2703 | |
| 2704 | // The {object} must be a spec object. It's sufficient to know that {object} |
| 2705 | // is not a smi, since all other non-spec objects have {null} prototypes and |
| 2706 | // will be ruled out below. |
| 2707 | if (instr->hydrogen()->ObjectNeedsSmiCheck()) { |
| 2708 | __ test(object, Immediate(kSmiTagMask)); |
| 2709 | EmitFalseBranch(instr, zero); |
| 2710 | } |
| 2711 | |
| 2712 | // Loop through the {object}s prototype chain looking for the {prototype}. |
| 2713 | __ mov(object_map, FieldOperand(object, HeapObject::kMapOffset)); |
| 2714 | Label loop; |
| 2715 | __ bind(&loop); |
| 2716 | |
| 2717 | // Deoptimize if the object needs to be access checked. |
| 2718 | __ test_b(FieldOperand(object_map, Map::kBitFieldOffset), |
| 2719 | 1 << Map::kIsAccessCheckNeeded); |
| 2720 | DeoptimizeIf(not_zero, instr, Deoptimizer::kAccessCheck); |
| 2721 | // Deoptimize for proxies. |
| 2722 | __ CmpInstanceType(object_map, JS_PROXY_TYPE); |
| 2723 | DeoptimizeIf(equal, instr, Deoptimizer::kProxy); |
| 2724 | |
| 2725 | __ mov(object_prototype, FieldOperand(object_map, Map::kPrototypeOffset)); |
| 2726 | __ cmp(object_prototype, prototype); |
| 2727 | EmitTrueBranch(instr, equal); |
| 2728 | __ cmp(object_prototype, factory()->null_value()); |
| 2729 | EmitFalseBranch(instr, equal); |
| 2730 | __ mov(object_map, FieldOperand(object_prototype, HeapObject::kMapOffset)); |
| 2731 | __ jmp(&loop); |
| 2732 | } |
| 2733 | |
| 2734 | |
| 2735 | void LCodeGen::DoCmpT(LCmpT* instr) { |
| 2736 | Token::Value op = instr->op(); |
| 2737 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2738 | Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).code(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2739 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 2740 | |
| 2741 | Condition condition = ComputeCompareCondition(op); |
| 2742 | Label true_value, done; |
| 2743 | __ test(eax, Operand(eax)); |
| 2744 | __ j(condition, &true_value, Label::kNear); |
| 2745 | __ mov(ToRegister(instr->result()), factory()->false_value()); |
| 2746 | __ jmp(&done, Label::kNear); |
| 2747 | __ bind(&true_value); |
| 2748 | __ mov(ToRegister(instr->result()), factory()->true_value()); |
| 2749 | __ bind(&done); |
| 2750 | } |
| 2751 | |
| 2752 | |
| 2753 | void LCodeGen::EmitReturn(LReturn* instr, bool dynamic_frame_alignment) { |
| 2754 | int extra_value_count = dynamic_frame_alignment ? 2 : 1; |
| 2755 | |
| 2756 | if (instr->has_constant_parameter_count()) { |
| 2757 | int parameter_count = ToInteger32(instr->constant_parameter_count()); |
| 2758 | if (dynamic_frame_alignment && FLAG_debug_code) { |
| 2759 | __ cmp(Operand(esp, |
| 2760 | (parameter_count + extra_value_count) * kPointerSize), |
| 2761 | Immediate(kAlignmentZapValue)); |
| 2762 | __ Assert(equal, kExpectedAlignmentMarker); |
| 2763 | } |
| 2764 | __ Ret((parameter_count + extra_value_count) * kPointerSize, ecx); |
| 2765 | } else { |
| 2766 | DCHECK(info()->IsStub()); // Functions would need to drop one more value. |
| 2767 | Register reg = ToRegister(instr->parameter_count()); |
| 2768 | // The argument count parameter is a smi |
| 2769 | __ SmiUntag(reg); |
| 2770 | Register return_addr_reg = reg.is(ecx) ? ebx : ecx; |
| 2771 | if (dynamic_frame_alignment && FLAG_debug_code) { |
| 2772 | DCHECK(extra_value_count == 2); |
| 2773 | __ cmp(Operand(esp, reg, times_pointer_size, |
| 2774 | extra_value_count * kPointerSize), |
| 2775 | Immediate(kAlignmentZapValue)); |
| 2776 | __ Assert(equal, kExpectedAlignmentMarker); |
| 2777 | } |
| 2778 | |
| 2779 | // emit code to restore stack based on instr->parameter_count() |
| 2780 | __ pop(return_addr_reg); // save return address |
| 2781 | if (dynamic_frame_alignment) { |
| 2782 | __ inc(reg); // 1 more for alignment |
| 2783 | } |
| 2784 | __ shl(reg, kPointerSizeLog2); |
| 2785 | __ add(esp, reg); |
| 2786 | __ jmp(return_addr_reg); |
| 2787 | } |
| 2788 | } |
| 2789 | |
| 2790 | |
| 2791 | void LCodeGen::DoReturn(LReturn* instr) { |
| 2792 | if (FLAG_trace && info()->IsOptimizing()) { |
| 2793 | // Preserve the return value on the stack and rely on the runtime call |
| 2794 | // to return the value in the same register. We're leaving the code |
| 2795 | // managed by the register allocator and tearing down the frame, it's |
| 2796 | // safe to write to the context register. |
| 2797 | __ push(eax); |
| 2798 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 2799 | __ CallRuntime(Runtime::kTraceExit); |
| 2800 | } |
| 2801 | if (dynamic_frame_alignment_) { |
| 2802 | // Fetch the state of the dynamic frame alignment. |
| 2803 | __ mov(edx, Operand(ebp, |
| 2804 | JavaScriptFrameConstants::kDynamicAlignmentStateOffset)); |
| 2805 | } |
| 2806 | if (NeedsEagerFrame()) { |
| 2807 | __ mov(esp, ebp); |
| 2808 | __ pop(ebp); |
| 2809 | } |
| 2810 | if (dynamic_frame_alignment_) { |
| 2811 | Label no_padding; |
| 2812 | __ cmp(edx, Immediate(kNoAlignmentPadding)); |
| 2813 | __ j(equal, &no_padding, Label::kNear); |
| 2814 | |
| 2815 | EmitReturn(instr, true); |
| 2816 | __ bind(&no_padding); |
| 2817 | } |
| 2818 | |
| 2819 | EmitReturn(instr, false); |
| 2820 | } |
| 2821 | |
| 2822 | |
| 2823 | template <class T> |
| 2824 | void LCodeGen::EmitVectorLoadICRegisters(T* instr) { |
| 2825 | Register vector_register = ToRegister(instr->temp_vector()); |
| 2826 | Register slot_register = LoadWithVectorDescriptor::SlotRegister(); |
| 2827 | DCHECK(vector_register.is(LoadWithVectorDescriptor::VectorRegister())); |
| 2828 | DCHECK(slot_register.is(eax)); |
| 2829 | |
| 2830 | AllowDeferredHandleDereference vector_structure_check; |
| 2831 | Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector(); |
| 2832 | __ mov(vector_register, vector); |
| 2833 | // No need to allocate this register. |
| 2834 | FeedbackVectorSlot slot = instr->hydrogen()->slot(); |
| 2835 | int index = vector->GetIndex(slot); |
| 2836 | __ mov(slot_register, Immediate(Smi::FromInt(index))); |
| 2837 | } |
| 2838 | |
| 2839 | |
| 2840 | template <class T> |
| 2841 | void LCodeGen::EmitVectorStoreICRegisters(T* instr) { |
| 2842 | Register vector_register = ToRegister(instr->temp_vector()); |
| 2843 | Register slot_register = ToRegister(instr->temp_slot()); |
| 2844 | |
| 2845 | AllowDeferredHandleDereference vector_structure_check; |
| 2846 | Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector(); |
| 2847 | __ mov(vector_register, vector); |
| 2848 | FeedbackVectorSlot slot = instr->hydrogen()->slot(); |
| 2849 | int index = vector->GetIndex(slot); |
| 2850 | __ mov(slot_register, Immediate(Smi::FromInt(index))); |
| 2851 | } |
| 2852 | |
| 2853 | |
| 2854 | void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) { |
| 2855 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 2856 | DCHECK(ToRegister(instr->global_object()) |
| 2857 | .is(LoadDescriptor::ReceiverRegister())); |
| 2858 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 2859 | |
| 2860 | __ mov(LoadDescriptor::NameRegister(), instr->name()); |
| 2861 | EmitVectorLoadICRegisters<LLoadGlobalGeneric>(instr); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2862 | Handle<Code> ic = CodeFactory::LoadICInOptimizedCode( |
| 2863 | isolate(), instr->typeof_mode(), PREMONOMORPHIC) |
| 2864 | .code(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2865 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 2866 | } |
| 2867 | |
| 2868 | |
| 2869 | void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) { |
| 2870 | Register context = ToRegister(instr->context()); |
| 2871 | Register result = ToRegister(instr->result()); |
| 2872 | __ mov(result, ContextOperand(context, instr->slot_index())); |
| 2873 | |
| 2874 | if (instr->hydrogen()->RequiresHoleCheck()) { |
| 2875 | __ cmp(result, factory()->the_hole_value()); |
| 2876 | if (instr->hydrogen()->DeoptimizesOnHole()) { |
| 2877 | DeoptimizeIf(equal, instr, Deoptimizer::kHole); |
| 2878 | } else { |
| 2879 | Label is_not_hole; |
| 2880 | __ j(not_equal, &is_not_hole, Label::kNear); |
| 2881 | __ mov(result, factory()->undefined_value()); |
| 2882 | __ bind(&is_not_hole); |
| 2883 | } |
| 2884 | } |
| 2885 | } |
| 2886 | |
| 2887 | |
| 2888 | void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) { |
| 2889 | Register context = ToRegister(instr->context()); |
| 2890 | Register value = ToRegister(instr->value()); |
| 2891 | |
| 2892 | Label skip_assignment; |
| 2893 | |
| 2894 | Operand target = ContextOperand(context, instr->slot_index()); |
| 2895 | if (instr->hydrogen()->RequiresHoleCheck()) { |
| 2896 | __ cmp(target, factory()->the_hole_value()); |
| 2897 | if (instr->hydrogen()->DeoptimizesOnHole()) { |
| 2898 | DeoptimizeIf(equal, instr, Deoptimizer::kHole); |
| 2899 | } else { |
| 2900 | __ j(not_equal, &skip_assignment, Label::kNear); |
| 2901 | } |
| 2902 | } |
| 2903 | |
| 2904 | __ mov(target, value); |
| 2905 | if (instr->hydrogen()->NeedsWriteBarrier()) { |
| 2906 | SmiCheck check_needed = |
| 2907 | instr->hydrogen()->value()->type().IsHeapObject() |
| 2908 | ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| 2909 | Register temp = ToRegister(instr->temp()); |
| 2910 | int offset = Context::SlotOffset(instr->slot_index()); |
| 2911 | __ RecordWriteContextSlot(context, offset, value, temp, kSaveFPRegs, |
| 2912 | EMIT_REMEMBERED_SET, check_needed); |
| 2913 | } |
| 2914 | |
| 2915 | __ bind(&skip_assignment); |
| 2916 | } |
| 2917 | |
| 2918 | |
| 2919 | void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) { |
| 2920 | HObjectAccess access = instr->hydrogen()->access(); |
| 2921 | int offset = access.offset(); |
| 2922 | |
| 2923 | if (access.IsExternalMemory()) { |
| 2924 | Register result = ToRegister(instr->result()); |
| 2925 | MemOperand operand = instr->object()->IsConstantOperand() |
| 2926 | ? MemOperand::StaticVariable(ToExternalReference( |
| 2927 | LConstantOperand::cast(instr->object()))) |
| 2928 | : MemOperand(ToRegister(instr->object()), offset); |
| 2929 | __ Load(result, operand, access.representation()); |
| 2930 | return; |
| 2931 | } |
| 2932 | |
| 2933 | Register object = ToRegister(instr->object()); |
| 2934 | if (instr->hydrogen()->representation().IsDouble()) { |
| 2935 | X87Mov(ToX87Register(instr->result()), FieldOperand(object, offset)); |
| 2936 | return; |
| 2937 | } |
| 2938 | |
| 2939 | Register result = ToRegister(instr->result()); |
| 2940 | if (!access.IsInobject()) { |
| 2941 | __ mov(result, FieldOperand(object, JSObject::kPropertiesOffset)); |
| 2942 | object = result; |
| 2943 | } |
| 2944 | __ Load(result, FieldOperand(object, offset), access.representation()); |
| 2945 | } |
| 2946 | |
| 2947 | |
| 2948 | void LCodeGen::EmitPushTaggedOperand(LOperand* operand) { |
| 2949 | DCHECK(!operand->IsDoubleRegister()); |
| 2950 | if (operand->IsConstantOperand()) { |
| 2951 | Handle<Object> object = ToHandle(LConstantOperand::cast(operand)); |
| 2952 | AllowDeferredHandleDereference smi_check; |
| 2953 | if (object->IsSmi()) { |
| 2954 | __ Push(Handle<Smi>::cast(object)); |
| 2955 | } else { |
| 2956 | __ PushHeapObject(Handle<HeapObject>::cast(object)); |
| 2957 | } |
| 2958 | } else if (operand->IsRegister()) { |
| 2959 | __ push(ToRegister(operand)); |
| 2960 | } else { |
| 2961 | __ push(ToOperand(operand)); |
| 2962 | } |
| 2963 | } |
| 2964 | |
| 2965 | |
| 2966 | void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) { |
| 2967 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 2968 | DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister())); |
| 2969 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 2970 | |
| 2971 | __ mov(LoadDescriptor::NameRegister(), instr->name()); |
| 2972 | EmitVectorLoadICRegisters<LLoadNamedGeneric>(instr); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 2973 | Handle<Code> ic = CodeFactory::LoadICInOptimizedCode( |
| 2974 | isolate(), NOT_INSIDE_TYPEOF, |
| 2975 | instr->hydrogen()->initialization_state()) |
| 2976 | .code(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2977 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 2978 | } |
| 2979 | |
| 2980 | |
| 2981 | void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) { |
| 2982 | Register function = ToRegister(instr->function()); |
| 2983 | Register temp = ToRegister(instr->temp()); |
| 2984 | Register result = ToRegister(instr->result()); |
| 2985 | |
| 2986 | // Get the prototype or initial map from the function. |
| 2987 | __ mov(result, |
| 2988 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2989 | |
| 2990 | // Check that the function has a prototype or an initial map. |
| 2991 | __ cmp(Operand(result), Immediate(factory()->the_hole_value())); |
| 2992 | DeoptimizeIf(equal, instr, Deoptimizer::kHole); |
| 2993 | |
| 2994 | // If the function does not have an initial map, we're done. |
| 2995 | Label done; |
| 2996 | __ CmpObjectType(result, MAP_TYPE, temp); |
| 2997 | __ j(not_equal, &done, Label::kNear); |
| 2998 | |
| 2999 | // Get the prototype from the initial map. |
| 3000 | __ mov(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 3001 | |
| 3002 | // All done. |
| 3003 | __ bind(&done); |
| 3004 | } |
| 3005 | |
| 3006 | |
| 3007 | void LCodeGen::DoLoadRoot(LLoadRoot* instr) { |
| 3008 | Register result = ToRegister(instr->result()); |
| 3009 | __ LoadRoot(result, instr->index()); |
| 3010 | } |
| 3011 | |
| 3012 | |
| 3013 | void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
| 3014 | Register arguments = ToRegister(instr->arguments()); |
| 3015 | Register result = ToRegister(instr->result()); |
| 3016 | if (instr->length()->IsConstantOperand() && |
| 3017 | instr->index()->IsConstantOperand()) { |
| 3018 | int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| 3019 | int const_length = ToInteger32(LConstantOperand::cast(instr->length())); |
| 3020 | int index = (const_length - const_index) + 1; |
| 3021 | __ mov(result, Operand(arguments, index * kPointerSize)); |
| 3022 | } else { |
| 3023 | Register length = ToRegister(instr->length()); |
| 3024 | Operand index = ToOperand(instr->index()); |
| 3025 | // There are two words between the frame pointer and the last argument. |
| 3026 | // Subtracting from length accounts for one of them add one more. |
| 3027 | __ sub(length, index); |
| 3028 | __ mov(result, Operand(arguments, length, times_4, kPointerSize)); |
| 3029 | } |
| 3030 | } |
| 3031 | |
| 3032 | |
| 3033 | void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { |
| 3034 | ElementsKind elements_kind = instr->elements_kind(); |
| 3035 | LOperand* key = instr->key(); |
| 3036 | if (!key->IsConstantOperand() && |
| 3037 | ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(), |
| 3038 | elements_kind)) { |
| 3039 | __ SmiUntag(ToRegister(key)); |
| 3040 | } |
| 3041 | Operand operand(BuildFastArrayOperand( |
| 3042 | instr->elements(), |
| 3043 | key, |
| 3044 | instr->hydrogen()->key()->representation(), |
| 3045 | elements_kind, |
| 3046 | instr->base_offset())); |
| 3047 | if (elements_kind == FLOAT32_ELEMENTS) { |
| 3048 | X87Mov(ToX87Register(instr->result()), operand, kX87FloatOperand); |
| 3049 | } else if (elements_kind == FLOAT64_ELEMENTS) { |
| 3050 | X87Mov(ToX87Register(instr->result()), operand); |
| 3051 | } else { |
| 3052 | Register result(ToRegister(instr->result())); |
| 3053 | switch (elements_kind) { |
| 3054 | case INT8_ELEMENTS: |
| 3055 | __ movsx_b(result, operand); |
| 3056 | break; |
| 3057 | case UINT8_ELEMENTS: |
| 3058 | case UINT8_CLAMPED_ELEMENTS: |
| 3059 | __ movzx_b(result, operand); |
| 3060 | break; |
| 3061 | case INT16_ELEMENTS: |
| 3062 | __ movsx_w(result, operand); |
| 3063 | break; |
| 3064 | case UINT16_ELEMENTS: |
| 3065 | __ movzx_w(result, operand); |
| 3066 | break; |
| 3067 | case INT32_ELEMENTS: |
| 3068 | __ mov(result, operand); |
| 3069 | break; |
| 3070 | case UINT32_ELEMENTS: |
| 3071 | __ mov(result, operand); |
| 3072 | if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) { |
| 3073 | __ test(result, Operand(result)); |
| 3074 | DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue); |
| 3075 | } |
| 3076 | break; |
| 3077 | case FLOAT32_ELEMENTS: |
| 3078 | case FLOAT64_ELEMENTS: |
| 3079 | case FAST_SMI_ELEMENTS: |
| 3080 | case FAST_ELEMENTS: |
| 3081 | case FAST_DOUBLE_ELEMENTS: |
| 3082 | case FAST_HOLEY_SMI_ELEMENTS: |
| 3083 | case FAST_HOLEY_ELEMENTS: |
| 3084 | case FAST_HOLEY_DOUBLE_ELEMENTS: |
| 3085 | case DICTIONARY_ELEMENTS: |
| 3086 | case FAST_SLOPPY_ARGUMENTS_ELEMENTS: |
| 3087 | case SLOW_SLOPPY_ARGUMENTS_ELEMENTS: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3088 | case FAST_STRING_WRAPPER_ELEMENTS: |
| 3089 | case SLOW_STRING_WRAPPER_ELEMENTS: |
| 3090 | case NO_ELEMENTS: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3091 | UNREACHABLE(); |
| 3092 | break; |
| 3093 | } |
| 3094 | } |
| 3095 | } |
| 3096 | |
| 3097 | |
| 3098 | void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) { |
| 3099 | if (instr->hydrogen()->RequiresHoleCheck()) { |
| 3100 | Operand hole_check_operand = BuildFastArrayOperand( |
| 3101 | instr->elements(), instr->key(), |
| 3102 | instr->hydrogen()->key()->representation(), |
| 3103 | FAST_DOUBLE_ELEMENTS, |
| 3104 | instr->base_offset() + sizeof(kHoleNanLower32)); |
| 3105 | __ cmp(hole_check_operand, Immediate(kHoleNanUpper32)); |
| 3106 | DeoptimizeIf(equal, instr, Deoptimizer::kHole); |
| 3107 | } |
| 3108 | |
| 3109 | Operand double_load_operand = BuildFastArrayOperand( |
| 3110 | instr->elements(), |
| 3111 | instr->key(), |
| 3112 | instr->hydrogen()->key()->representation(), |
| 3113 | FAST_DOUBLE_ELEMENTS, |
| 3114 | instr->base_offset()); |
| 3115 | X87Mov(ToX87Register(instr->result()), double_load_operand); |
| 3116 | } |
| 3117 | |
| 3118 | |
| 3119 | void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) { |
| 3120 | Register result = ToRegister(instr->result()); |
| 3121 | |
| 3122 | // Load the result. |
| 3123 | __ mov(result, |
| 3124 | BuildFastArrayOperand(instr->elements(), instr->key(), |
| 3125 | instr->hydrogen()->key()->representation(), |
| 3126 | FAST_ELEMENTS, instr->base_offset())); |
| 3127 | |
| 3128 | // Check for the hole value. |
| 3129 | if (instr->hydrogen()->RequiresHoleCheck()) { |
| 3130 | if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) { |
| 3131 | __ test(result, Immediate(kSmiTagMask)); |
| 3132 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotASmi); |
| 3133 | } else { |
| 3134 | __ cmp(result, factory()->the_hole_value()); |
| 3135 | DeoptimizeIf(equal, instr, Deoptimizer::kHole); |
| 3136 | } |
| 3137 | } else if (instr->hydrogen()->hole_mode() == CONVERT_HOLE_TO_UNDEFINED) { |
| 3138 | DCHECK(instr->hydrogen()->elements_kind() == FAST_HOLEY_ELEMENTS); |
| 3139 | Label done; |
| 3140 | __ cmp(result, factory()->the_hole_value()); |
| 3141 | __ j(not_equal, &done); |
| 3142 | if (info()->IsStub()) { |
| 3143 | // A stub can safely convert the hole to undefined only if the array |
| 3144 | // protector cell contains (Smi) Isolate::kArrayProtectorValid. Otherwise |
| 3145 | // it needs to bail out. |
| 3146 | __ mov(result, isolate()->factory()->array_protector()); |
| 3147 | __ cmp(FieldOperand(result, PropertyCell::kValueOffset), |
| 3148 | Immediate(Smi::FromInt(Isolate::kArrayProtectorValid))); |
| 3149 | DeoptimizeIf(not_equal, instr, Deoptimizer::kHole); |
| 3150 | } |
| 3151 | __ mov(result, isolate()->factory()->undefined_value()); |
| 3152 | __ bind(&done); |
| 3153 | } |
| 3154 | } |
| 3155 | |
| 3156 | |
| 3157 | void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) { |
| 3158 | if (instr->is_fixed_typed_array()) { |
| 3159 | DoLoadKeyedExternalArray(instr); |
| 3160 | } else if (instr->hydrogen()->representation().IsDouble()) { |
| 3161 | DoLoadKeyedFixedDoubleArray(instr); |
| 3162 | } else { |
| 3163 | DoLoadKeyedFixedArray(instr); |
| 3164 | } |
| 3165 | } |
| 3166 | |
| 3167 | |
| 3168 | Operand LCodeGen::BuildFastArrayOperand( |
| 3169 | LOperand* elements_pointer, |
| 3170 | LOperand* key, |
| 3171 | Representation key_representation, |
| 3172 | ElementsKind elements_kind, |
| 3173 | uint32_t base_offset) { |
| 3174 | Register elements_pointer_reg = ToRegister(elements_pointer); |
| 3175 | int element_shift_size = ElementsKindToShiftSize(elements_kind); |
| 3176 | int shift_size = element_shift_size; |
| 3177 | if (key->IsConstantOperand()) { |
| 3178 | int constant_value = ToInteger32(LConstantOperand::cast(key)); |
| 3179 | if (constant_value & 0xF0000000) { |
| 3180 | Abort(kArrayIndexConstantValueTooBig); |
| 3181 | } |
| 3182 | return Operand(elements_pointer_reg, |
| 3183 | ((constant_value) << shift_size) |
| 3184 | + base_offset); |
| 3185 | } else { |
| 3186 | // Take the tag bit into account while computing the shift size. |
| 3187 | if (key_representation.IsSmi() && (shift_size >= 1)) { |
| 3188 | shift_size -= kSmiTagSize; |
| 3189 | } |
| 3190 | ScaleFactor scale_factor = static_cast<ScaleFactor>(shift_size); |
| 3191 | return Operand(elements_pointer_reg, |
| 3192 | ToRegister(key), |
| 3193 | scale_factor, |
| 3194 | base_offset); |
| 3195 | } |
| 3196 | } |
| 3197 | |
| 3198 | |
| 3199 | void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) { |
| 3200 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 3201 | DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister())); |
| 3202 | DCHECK(ToRegister(instr->key()).is(LoadDescriptor::NameRegister())); |
| 3203 | |
| 3204 | if (instr->hydrogen()->HasVectorAndSlot()) { |
| 3205 | EmitVectorLoadICRegisters<LLoadKeyedGeneric>(instr); |
| 3206 | } |
| 3207 | |
| 3208 | Handle<Code> ic = CodeFactory::KeyedLoadICInOptimizedCode( |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3209 | isolate(), instr->hydrogen()->initialization_state()) |
| 3210 | .code(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3211 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 3212 | } |
| 3213 | |
| 3214 | |
| 3215 | void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) { |
| 3216 | Register result = ToRegister(instr->result()); |
| 3217 | |
| 3218 | if (instr->hydrogen()->from_inlined()) { |
| 3219 | __ lea(result, Operand(esp, -2 * kPointerSize)); |
| 3220 | } else { |
| 3221 | // Check for arguments adapter frame. |
| 3222 | Label done, adapted; |
| 3223 | __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3224 | __ mov(result, Operand(result, StandardFrameConstants::kContextOffset)); |
| 3225 | __ cmp(Operand(result), |
| 3226 | Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 3227 | __ j(equal, &adapted, Label::kNear); |
| 3228 | |
| 3229 | // No arguments adaptor frame. |
| 3230 | __ mov(result, Operand(ebp)); |
| 3231 | __ jmp(&done, Label::kNear); |
| 3232 | |
| 3233 | // Arguments adaptor frame present. |
| 3234 | __ bind(&adapted); |
| 3235 | __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3236 | |
| 3237 | // Result is the frame pointer for the frame if not adapted and for the real |
| 3238 | // frame below the adaptor frame if adapted. |
| 3239 | __ bind(&done); |
| 3240 | } |
| 3241 | } |
| 3242 | |
| 3243 | |
| 3244 | void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) { |
| 3245 | Operand elem = ToOperand(instr->elements()); |
| 3246 | Register result = ToRegister(instr->result()); |
| 3247 | |
| 3248 | Label done; |
| 3249 | |
| 3250 | // If no arguments adaptor frame the number of arguments is fixed. |
| 3251 | __ cmp(ebp, elem); |
| 3252 | __ mov(result, Immediate(scope()->num_parameters())); |
| 3253 | __ j(equal, &done, Label::kNear); |
| 3254 | |
| 3255 | // Arguments adaptor frame present. Get argument length from there. |
| 3256 | __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| 3257 | __ mov(result, Operand(result, |
| 3258 | ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 3259 | __ SmiUntag(result); |
| 3260 | |
| 3261 | // Argument length is in result register. |
| 3262 | __ bind(&done); |
| 3263 | } |
| 3264 | |
| 3265 | |
| 3266 | void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) { |
| 3267 | Register receiver = ToRegister(instr->receiver()); |
| 3268 | Register function = ToRegister(instr->function()); |
| 3269 | |
| 3270 | // If the receiver is null or undefined, we have to pass the global |
| 3271 | // object as a receiver to normal functions. Values have to be |
| 3272 | // passed unchanged to builtins and strict-mode functions. |
| 3273 | Label receiver_ok, global_object; |
| 3274 | Register scratch = ToRegister(instr->temp()); |
| 3275 | |
| 3276 | if (!instr->hydrogen()->known_function()) { |
| 3277 | // Do not transform the receiver to object for strict mode |
| 3278 | // functions. |
| 3279 | __ mov(scratch, |
| 3280 | FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 3281 | __ test_b(FieldOperand(scratch, SharedFunctionInfo::kStrictModeByteOffset), |
| 3282 | 1 << SharedFunctionInfo::kStrictModeBitWithinByte); |
| 3283 | __ j(not_equal, &receiver_ok); |
| 3284 | |
| 3285 | // Do not transform the receiver to object for builtins. |
| 3286 | __ test_b(FieldOperand(scratch, SharedFunctionInfo::kNativeByteOffset), |
| 3287 | 1 << SharedFunctionInfo::kNativeBitWithinByte); |
| 3288 | __ j(not_equal, &receiver_ok); |
| 3289 | } |
| 3290 | |
| 3291 | // Normal function. Replace undefined or null with global receiver. |
| 3292 | __ cmp(receiver, factory()->null_value()); |
| 3293 | __ j(equal, &global_object); |
| 3294 | __ cmp(receiver, factory()->undefined_value()); |
| 3295 | __ j(equal, &global_object); |
| 3296 | |
| 3297 | // The receiver should be a JS object. |
| 3298 | __ test(receiver, Immediate(kSmiTagMask)); |
| 3299 | DeoptimizeIf(equal, instr, Deoptimizer::kSmi); |
| 3300 | __ CmpObjectType(receiver, FIRST_JS_RECEIVER_TYPE, scratch); |
| 3301 | DeoptimizeIf(below, instr, Deoptimizer::kNotAJavaScriptObject); |
| 3302 | |
| 3303 | __ jmp(&receiver_ok, Label::kNear); |
| 3304 | __ bind(&global_object); |
| 3305 | __ mov(receiver, FieldOperand(function, JSFunction::kContextOffset)); |
| 3306 | __ mov(receiver, ContextOperand(receiver, Context::NATIVE_CONTEXT_INDEX)); |
| 3307 | __ mov(receiver, ContextOperand(receiver, Context::GLOBAL_PROXY_INDEX)); |
| 3308 | __ bind(&receiver_ok); |
| 3309 | } |
| 3310 | |
| 3311 | |
| 3312 | void LCodeGen::DoApplyArguments(LApplyArguments* instr) { |
| 3313 | Register receiver = ToRegister(instr->receiver()); |
| 3314 | Register function = ToRegister(instr->function()); |
| 3315 | Register length = ToRegister(instr->length()); |
| 3316 | Register elements = ToRegister(instr->elements()); |
| 3317 | DCHECK(receiver.is(eax)); // Used for parameter count. |
| 3318 | DCHECK(function.is(edi)); // Required by InvokeFunction. |
| 3319 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 3320 | |
| 3321 | // Copy the arguments to this function possibly from the |
| 3322 | // adaptor frame below it. |
| 3323 | const uint32_t kArgumentsLimit = 1 * KB; |
| 3324 | __ cmp(length, kArgumentsLimit); |
| 3325 | DeoptimizeIf(above, instr, Deoptimizer::kTooManyArguments); |
| 3326 | |
| 3327 | __ push(receiver); |
| 3328 | __ mov(receiver, length); |
| 3329 | |
| 3330 | // Loop through the arguments pushing them onto the execution |
| 3331 | // stack. |
| 3332 | Label invoke, loop; |
| 3333 | // length is a small non-negative integer, due to the test above. |
| 3334 | __ test(length, Operand(length)); |
| 3335 | __ j(zero, &invoke, Label::kNear); |
| 3336 | __ bind(&loop); |
| 3337 | __ push(Operand(elements, length, times_pointer_size, 1 * kPointerSize)); |
| 3338 | __ dec(length); |
| 3339 | __ j(not_zero, &loop); |
| 3340 | |
| 3341 | // Invoke the function. |
| 3342 | __ bind(&invoke); |
| 3343 | DCHECK(instr->HasPointerMap()); |
| 3344 | LPointerMap* pointers = instr->pointer_map(); |
| 3345 | SafepointGenerator safepoint_generator( |
| 3346 | this, pointers, Safepoint::kLazyDeopt); |
| 3347 | ParameterCount actual(eax); |
| 3348 | __ InvokeFunction(function, no_reg, actual, CALL_FUNCTION, |
| 3349 | safepoint_generator); |
| 3350 | } |
| 3351 | |
| 3352 | |
| 3353 | void LCodeGen::DoDebugBreak(LDebugBreak* instr) { |
| 3354 | __ int3(); |
| 3355 | } |
| 3356 | |
| 3357 | |
| 3358 | void LCodeGen::DoPushArgument(LPushArgument* instr) { |
| 3359 | LOperand* argument = instr->value(); |
| 3360 | EmitPushTaggedOperand(argument); |
| 3361 | } |
| 3362 | |
| 3363 | |
| 3364 | void LCodeGen::DoDrop(LDrop* instr) { |
| 3365 | __ Drop(instr->count()); |
| 3366 | } |
| 3367 | |
| 3368 | |
| 3369 | void LCodeGen::DoThisFunction(LThisFunction* instr) { |
| 3370 | Register result = ToRegister(instr->result()); |
| 3371 | __ mov(result, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 3372 | } |
| 3373 | |
| 3374 | |
| 3375 | void LCodeGen::DoContext(LContext* instr) { |
| 3376 | Register result = ToRegister(instr->result()); |
| 3377 | if (info()->IsOptimizing()) { |
| 3378 | __ mov(result, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3379 | } else { |
| 3380 | // If there is no frame, the context must be in esi. |
| 3381 | DCHECK(result.is(esi)); |
| 3382 | } |
| 3383 | } |
| 3384 | |
| 3385 | |
| 3386 | void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) { |
| 3387 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 3388 | __ push(Immediate(instr->hydrogen()->pairs())); |
| 3389 | __ push(Immediate(Smi::FromInt(instr->hydrogen()->flags()))); |
| 3390 | CallRuntime(Runtime::kDeclareGlobals, instr); |
| 3391 | } |
| 3392 | |
| 3393 | |
| 3394 | void LCodeGen::CallKnownFunction(Handle<JSFunction> function, |
| 3395 | int formal_parameter_count, int arity, |
| 3396 | LInstruction* instr) { |
| 3397 | bool dont_adapt_arguments = |
| 3398 | formal_parameter_count == SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 3399 | bool can_invoke_directly = |
| 3400 | dont_adapt_arguments || formal_parameter_count == arity; |
| 3401 | |
| 3402 | Register function_reg = edi; |
| 3403 | |
| 3404 | if (can_invoke_directly) { |
| 3405 | // Change context. |
| 3406 | __ mov(esi, FieldOperand(function_reg, JSFunction::kContextOffset)); |
| 3407 | |
| 3408 | // Always initialize new target and number of actual arguments. |
| 3409 | __ mov(edx, factory()->undefined_value()); |
| 3410 | __ mov(eax, arity); |
| 3411 | |
| 3412 | // Invoke function directly. |
| 3413 | if (function.is_identical_to(info()->closure())) { |
| 3414 | __ CallSelf(); |
| 3415 | } else { |
| 3416 | __ call(FieldOperand(function_reg, JSFunction::kCodeEntryOffset)); |
| 3417 | } |
| 3418 | RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| 3419 | } else { |
| 3420 | // We need to adapt arguments. |
| 3421 | LPointerMap* pointers = instr->pointer_map(); |
| 3422 | SafepointGenerator generator( |
| 3423 | this, pointers, Safepoint::kLazyDeopt); |
| 3424 | ParameterCount count(arity); |
| 3425 | ParameterCount expected(formal_parameter_count); |
| 3426 | __ InvokeFunction(function_reg, expected, count, CALL_FUNCTION, generator); |
| 3427 | } |
| 3428 | } |
| 3429 | |
| 3430 | |
| 3431 | void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) { |
| 3432 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 3433 | |
| 3434 | if (instr->hydrogen()->IsTailCall()) { |
| 3435 | if (NeedsEagerFrame()) __ leave(); |
| 3436 | |
| 3437 | if (instr->target()->IsConstantOperand()) { |
| 3438 | LConstantOperand* target = LConstantOperand::cast(instr->target()); |
| 3439 | Handle<Code> code = Handle<Code>::cast(ToHandle(target)); |
| 3440 | __ jmp(code, RelocInfo::CODE_TARGET); |
| 3441 | } else { |
| 3442 | DCHECK(instr->target()->IsRegister()); |
| 3443 | Register target = ToRegister(instr->target()); |
| 3444 | __ add(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 3445 | __ jmp(target); |
| 3446 | } |
| 3447 | } else { |
| 3448 | LPointerMap* pointers = instr->pointer_map(); |
| 3449 | SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt); |
| 3450 | |
| 3451 | if (instr->target()->IsConstantOperand()) { |
| 3452 | LConstantOperand* target = LConstantOperand::cast(instr->target()); |
| 3453 | Handle<Code> code = Handle<Code>::cast(ToHandle(target)); |
| 3454 | generator.BeforeCall(__ CallSize(code, RelocInfo::CODE_TARGET)); |
| 3455 | __ call(code, RelocInfo::CODE_TARGET); |
| 3456 | } else { |
| 3457 | DCHECK(instr->target()->IsRegister()); |
| 3458 | Register target = ToRegister(instr->target()); |
| 3459 | generator.BeforeCall(__ CallSize(Operand(target))); |
| 3460 | __ add(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 3461 | __ call(target); |
| 3462 | } |
| 3463 | generator.AfterCall(); |
| 3464 | } |
| 3465 | } |
| 3466 | |
| 3467 | |
| 3468 | void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) { |
| 3469 | DCHECK(ToRegister(instr->function()).is(edi)); |
| 3470 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 3471 | |
| 3472 | // Change context. |
| 3473 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 3474 | |
| 3475 | // Always initialize new target and number of actual arguments. |
| 3476 | __ mov(edx, factory()->undefined_value()); |
| 3477 | __ mov(eax, instr->arity()); |
| 3478 | |
| 3479 | bool is_self_call = false; |
| 3480 | if (instr->hydrogen()->function()->IsConstant()) { |
| 3481 | HConstant* fun_const = HConstant::cast(instr->hydrogen()->function()); |
| 3482 | Handle<JSFunction> jsfun = |
| 3483 | Handle<JSFunction>::cast(fun_const->handle(isolate())); |
| 3484 | is_self_call = jsfun.is_identical_to(info()->closure()); |
| 3485 | } |
| 3486 | |
| 3487 | if (is_self_call) { |
| 3488 | __ CallSelf(); |
| 3489 | } else { |
| 3490 | __ call(FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| 3491 | } |
| 3492 | |
| 3493 | RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| 3494 | } |
| 3495 | |
| 3496 | |
| 3497 | void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { |
| 3498 | Register input_reg = ToRegister(instr->value()); |
| 3499 | __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| 3500 | factory()->heap_number_map()); |
| 3501 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); |
| 3502 | |
| 3503 | Label slow, allocated, done; |
| 3504 | Register tmp = input_reg.is(eax) ? ecx : eax; |
| 3505 | Register tmp2 = tmp.is(ecx) ? edx : input_reg.is(ecx) ? edx : ecx; |
| 3506 | |
| 3507 | // Preserve the value of all registers. |
| 3508 | PushSafepointRegistersScope scope(this); |
| 3509 | |
| 3510 | __ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| 3511 | // Check the sign of the argument. If the argument is positive, just |
| 3512 | // return it. We do not need to patch the stack since |input| and |
| 3513 | // |result| are the same register and |input| will be restored |
| 3514 | // unchanged by popping safepoint registers. |
| 3515 | __ test(tmp, Immediate(HeapNumber::kSignMask)); |
| 3516 | __ j(zero, &done, Label::kNear); |
| 3517 | |
| 3518 | __ AllocateHeapNumber(tmp, tmp2, no_reg, &slow); |
| 3519 | __ jmp(&allocated, Label::kNear); |
| 3520 | |
| 3521 | // Slow case: Call the runtime system to do the number allocation. |
| 3522 | __ bind(&slow); |
| 3523 | CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, |
| 3524 | instr, instr->context()); |
| 3525 | // Set the pointer to the new heap number in tmp. |
| 3526 | if (!tmp.is(eax)) __ mov(tmp, eax); |
| 3527 | // Restore input_reg after call to runtime. |
| 3528 | __ LoadFromSafepointRegisterSlot(input_reg, input_reg); |
| 3529 | |
| 3530 | __ bind(&allocated); |
| 3531 | __ mov(tmp2, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| 3532 | __ and_(tmp2, ~HeapNumber::kSignMask); |
| 3533 | __ mov(FieldOperand(tmp, HeapNumber::kExponentOffset), tmp2); |
| 3534 | __ mov(tmp2, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| 3535 | __ mov(FieldOperand(tmp, HeapNumber::kMantissaOffset), tmp2); |
| 3536 | __ StoreToSafepointRegisterSlot(input_reg, tmp); |
| 3537 | |
| 3538 | __ bind(&done); |
| 3539 | } |
| 3540 | |
| 3541 | |
| 3542 | void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) { |
| 3543 | Register input_reg = ToRegister(instr->value()); |
| 3544 | __ test(input_reg, Operand(input_reg)); |
| 3545 | Label is_positive; |
| 3546 | __ j(not_sign, &is_positive, Label::kNear); |
| 3547 | __ neg(input_reg); // Sets flags. |
| 3548 | DeoptimizeIf(negative, instr, Deoptimizer::kOverflow); |
| 3549 | __ bind(&is_positive); |
| 3550 | } |
| 3551 | |
| 3552 | |
| 3553 | void LCodeGen::DoMathAbs(LMathAbs* instr) { |
| 3554 | // Class for deferred case. |
| 3555 | class DeferredMathAbsTaggedHeapNumber final : public LDeferredCode { |
| 3556 | public: |
| 3557 | DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen, |
| 3558 | LMathAbs* instr, |
| 3559 | const X87Stack& x87_stack) |
| 3560 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 3561 | void Generate() override { |
| 3562 | codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_); |
| 3563 | } |
| 3564 | LInstruction* instr() override { return instr_; } |
| 3565 | |
| 3566 | private: |
| 3567 | LMathAbs* instr_; |
| 3568 | }; |
| 3569 | |
| 3570 | DCHECK(instr->value()->Equals(instr->result())); |
| 3571 | Representation r = instr->hydrogen()->value()->representation(); |
| 3572 | |
| 3573 | if (r.IsDouble()) { |
| 3574 | X87Register value = ToX87Register(instr->value()); |
| 3575 | X87Fxch(value); |
| 3576 | __ fabs(); |
| 3577 | } else if (r.IsSmiOrInteger32()) { |
| 3578 | EmitIntegerMathAbs(instr); |
| 3579 | } else { // Tagged case. |
| 3580 | DeferredMathAbsTaggedHeapNumber* deferred = |
| 3581 | new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr, x87_stack_); |
| 3582 | Register input_reg = ToRegister(instr->value()); |
| 3583 | // Smi check. |
| 3584 | __ JumpIfNotSmi(input_reg, deferred->entry()); |
| 3585 | EmitIntegerMathAbs(instr); |
| 3586 | __ bind(deferred->exit()); |
| 3587 | } |
| 3588 | } |
| 3589 | |
| 3590 | |
| 3591 | void LCodeGen::DoMathFloor(LMathFloor* instr) { |
| 3592 | Register output_reg = ToRegister(instr->result()); |
| 3593 | X87Register input_reg = ToX87Register(instr->value()); |
| 3594 | X87Fxch(input_reg); |
| 3595 | |
| 3596 | Label not_minus_zero, done; |
| 3597 | // Deoptimize on unordered. |
| 3598 | __ fldz(); |
| 3599 | __ fld(1); |
| 3600 | __ FCmp(); |
| 3601 | DeoptimizeIf(parity_even, instr, Deoptimizer::kNaN); |
| 3602 | __ j(below, ¬_minus_zero, Label::kNear); |
| 3603 | |
| 3604 | if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 3605 | // Check for negative zero. |
| 3606 | __ j(not_equal, ¬_minus_zero, Label::kNear); |
| 3607 | // +- 0.0. |
| 3608 | __ fld(0); |
| 3609 | __ FXamSign(); |
| 3610 | DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero); |
| 3611 | __ Move(output_reg, Immediate(0)); |
| 3612 | __ jmp(&done, Label::kFar); |
| 3613 | } |
| 3614 | |
| 3615 | // Positive input. |
| 3616 | // rc=01B, round down. |
| 3617 | __ bind(¬_minus_zero); |
| 3618 | __ fnclex(); |
| 3619 | __ X87SetRC(0x0400); |
| 3620 | __ sub(esp, Immediate(kPointerSize)); |
| 3621 | __ fist_s(Operand(esp, 0)); |
| 3622 | __ pop(output_reg); |
| 3623 | __ X87CheckIA(); |
| 3624 | DeoptimizeIf(equal, instr, Deoptimizer::kOverflow); |
| 3625 | __ fnclex(); |
| 3626 | __ X87SetRC(0x0000); |
| 3627 | __ bind(&done); |
| 3628 | } |
| 3629 | |
| 3630 | |
| 3631 | void LCodeGen::DoMathRound(LMathRound* instr) { |
| 3632 | X87Register input_reg = ToX87Register(instr->value()); |
| 3633 | Register result = ToRegister(instr->result()); |
| 3634 | X87Fxch(input_reg); |
| 3635 | Label below_one_half, below_minus_one_half, done; |
| 3636 | |
| 3637 | ExternalReference one_half = ExternalReference::address_of_one_half(); |
| 3638 | ExternalReference minus_one_half = |
| 3639 | ExternalReference::address_of_minus_one_half(); |
| 3640 | |
| 3641 | __ fld_d(Operand::StaticVariable(one_half)); |
| 3642 | __ fld(1); |
| 3643 | __ FCmp(); |
| 3644 | __ j(carry, &below_one_half); |
| 3645 | |
| 3646 | // Use rounds towards zero, since 0.5 <= x, we use floor(0.5 + x) |
| 3647 | __ fld(0); |
| 3648 | __ fadd_d(Operand::StaticVariable(one_half)); |
| 3649 | // rc=11B, round toward zero. |
| 3650 | __ X87SetRC(0x0c00); |
| 3651 | __ sub(esp, Immediate(kPointerSize)); |
| 3652 | // Clear exception bits. |
| 3653 | __ fnclex(); |
| 3654 | __ fistp_s(MemOperand(esp, 0)); |
| 3655 | // Check overflow. |
| 3656 | __ X87CheckIA(); |
| 3657 | __ pop(result); |
| 3658 | DeoptimizeIf(equal, instr, Deoptimizer::kConversionOverflow); |
| 3659 | __ fnclex(); |
| 3660 | // Restore round mode. |
| 3661 | __ X87SetRC(0x0000); |
| 3662 | __ jmp(&done); |
| 3663 | |
| 3664 | __ bind(&below_one_half); |
| 3665 | __ fld_d(Operand::StaticVariable(minus_one_half)); |
| 3666 | __ fld(1); |
| 3667 | __ FCmp(); |
| 3668 | __ j(carry, &below_minus_one_half); |
| 3669 | // We return 0 for the input range [+0, 0.5[, or [-0.5, 0.5[ if |
| 3670 | // we can ignore the difference between a result of -0 and +0. |
| 3671 | if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| 3672 | // If the sign is positive, we return +0. |
| 3673 | __ fld(0); |
| 3674 | __ FXamSign(); |
| 3675 | DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero); |
| 3676 | } |
| 3677 | __ Move(result, Immediate(0)); |
| 3678 | __ jmp(&done); |
| 3679 | |
| 3680 | __ bind(&below_minus_one_half); |
| 3681 | __ fld(0); |
| 3682 | __ fadd_d(Operand::StaticVariable(one_half)); |
| 3683 | // rc=01B, round down. |
| 3684 | __ X87SetRC(0x0400); |
| 3685 | __ sub(esp, Immediate(kPointerSize)); |
| 3686 | // Clear exception bits. |
| 3687 | __ fnclex(); |
| 3688 | __ fistp_s(MemOperand(esp, 0)); |
| 3689 | // Check overflow. |
| 3690 | __ X87CheckIA(); |
| 3691 | __ pop(result); |
| 3692 | DeoptimizeIf(equal, instr, Deoptimizer::kConversionOverflow); |
| 3693 | __ fnclex(); |
| 3694 | // Restore round mode. |
| 3695 | __ X87SetRC(0x0000); |
| 3696 | |
| 3697 | __ bind(&done); |
| 3698 | } |
| 3699 | |
| 3700 | |
| 3701 | void LCodeGen::DoMathFround(LMathFround* instr) { |
| 3702 | X87Register input_reg = ToX87Register(instr->value()); |
| 3703 | X87Fxch(input_reg); |
| 3704 | __ sub(esp, Immediate(kPointerSize)); |
| 3705 | __ fstp_s(MemOperand(esp, 0)); |
| 3706 | X87Fld(MemOperand(esp, 0), kX87FloatOperand); |
| 3707 | __ add(esp, Immediate(kPointerSize)); |
| 3708 | } |
| 3709 | |
| 3710 | |
| 3711 | void LCodeGen::DoMathSqrt(LMathSqrt* instr) { |
| 3712 | X87Register input_reg = ToX87Register(instr->value()); |
| 3713 | __ X87SetFPUCW(0x027F); |
| 3714 | X87Fxch(input_reg); |
| 3715 | __ fsqrt(); |
| 3716 | __ X87SetFPUCW(0x037F); |
| 3717 | } |
| 3718 | |
| 3719 | |
| 3720 | void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) { |
| 3721 | X87Register input_reg = ToX87Register(instr->value()); |
| 3722 | DCHECK(ToX87Register(instr->result()).is(input_reg)); |
| 3723 | X87Fxch(input_reg); |
| 3724 | // Note that according to ECMA-262 15.8.2.13: |
| 3725 | // Math.pow(-Infinity, 0.5) == Infinity |
| 3726 | // Math.sqrt(-Infinity) == NaN |
| 3727 | Label done, sqrt; |
| 3728 | // Check base for -Infinity. C3 == 0, C2 == 1, C1 == 1 and C0 == 1 |
| 3729 | __ fxam(); |
| 3730 | __ push(eax); |
| 3731 | __ fnstsw_ax(); |
| 3732 | __ and_(eax, Immediate(0x4700)); |
| 3733 | __ cmp(eax, Immediate(0x0700)); |
| 3734 | __ j(not_equal, &sqrt, Label::kNear); |
| 3735 | // If input is -Infinity, return Infinity. |
| 3736 | __ fchs(); |
| 3737 | __ jmp(&done, Label::kNear); |
| 3738 | |
| 3739 | // Square root. |
| 3740 | __ bind(&sqrt); |
| 3741 | __ fldz(); |
| 3742 | __ faddp(); // Convert -0 to +0. |
| 3743 | __ fsqrt(); |
| 3744 | __ bind(&done); |
| 3745 | __ pop(eax); |
| 3746 | } |
| 3747 | |
| 3748 | |
| 3749 | void LCodeGen::DoPower(LPower* instr) { |
| 3750 | Representation exponent_type = instr->hydrogen()->right()->representation(); |
| 3751 | X87Register result = ToX87Register(instr->result()); |
| 3752 | // Having marked this as a call, we can use any registers. |
| 3753 | X87Register base = ToX87Register(instr->left()); |
| 3754 | ExternalReference one_half = ExternalReference::address_of_one_half(); |
| 3755 | |
| 3756 | if (exponent_type.IsSmi()) { |
| 3757 | Register exponent = ToRegister(instr->right()); |
| 3758 | X87LoadForUsage(base); |
| 3759 | __ SmiUntag(exponent); |
| 3760 | __ push(exponent); |
| 3761 | __ fild_s(MemOperand(esp, 0)); |
| 3762 | __ pop(exponent); |
| 3763 | } else if (exponent_type.IsTagged()) { |
| 3764 | Register exponent = ToRegister(instr->right()); |
| 3765 | Register temp = exponent.is(ecx) ? eax : ecx; |
| 3766 | Label no_deopt, done; |
| 3767 | X87LoadForUsage(base); |
| 3768 | __ JumpIfSmi(exponent, &no_deopt); |
| 3769 | __ CmpObjectType(exponent, HEAP_NUMBER_TYPE, temp); |
| 3770 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); |
| 3771 | // Heap number(double) |
| 3772 | __ fld_d(FieldOperand(exponent, HeapNumber::kValueOffset)); |
| 3773 | __ jmp(&done); |
| 3774 | // SMI |
| 3775 | __ bind(&no_deopt); |
| 3776 | __ SmiUntag(exponent); |
| 3777 | __ push(exponent); |
| 3778 | __ fild_s(MemOperand(esp, 0)); |
| 3779 | __ pop(exponent); |
| 3780 | __ bind(&done); |
| 3781 | } else if (exponent_type.IsInteger32()) { |
| 3782 | Register exponent = ToRegister(instr->right()); |
| 3783 | X87LoadForUsage(base); |
| 3784 | __ push(exponent); |
| 3785 | __ fild_s(MemOperand(esp, 0)); |
| 3786 | __ pop(exponent); |
| 3787 | } else { |
| 3788 | DCHECK(exponent_type.IsDouble()); |
| 3789 | X87Register exponent_double = ToX87Register(instr->right()); |
| 3790 | X87LoadForUsage(base, exponent_double); |
| 3791 | } |
| 3792 | |
| 3793 | // FP data stack {base, exponent(TOS)}. |
| 3794 | // Handle (exponent==+-0.5 && base == -0). |
| 3795 | Label not_plus_0; |
| 3796 | __ fld(0); |
| 3797 | __ fabs(); |
| 3798 | X87Fld(Operand::StaticVariable(one_half), kX87DoubleOperand); |
| 3799 | __ FCmp(); |
| 3800 | __ j(parity_even, ¬_plus_0, Label::kNear); // NaN. |
| 3801 | __ j(not_equal, ¬_plus_0, Label::kNear); |
| 3802 | __ fldz(); |
| 3803 | // FP data stack {base, exponent(TOS), zero}. |
| 3804 | __ faddp(2); |
| 3805 | __ bind(¬_plus_0); |
| 3806 | |
| 3807 | { |
| 3808 | __ PrepareCallCFunction(4, eax); |
| 3809 | __ fstp_d(MemOperand(esp, kDoubleSize)); // Exponent value. |
| 3810 | __ fstp_d(MemOperand(esp, 0)); // Base value. |
| 3811 | X87PrepareToWrite(result); |
| 3812 | __ CallCFunction(ExternalReference::power_double_double_function(isolate()), |
| 3813 | 4); |
| 3814 | // Return value is in st(0) on ia32. |
| 3815 | X87CommitWrite(result); |
| 3816 | } |
| 3817 | } |
| 3818 | |
| 3819 | |
| 3820 | void LCodeGen::DoMathLog(LMathLog* instr) { |
| 3821 | DCHECK(instr->value()->Equals(instr->result())); |
| 3822 | X87Register input_reg = ToX87Register(instr->value()); |
| 3823 | X87Fxch(input_reg); |
| 3824 | |
| 3825 | Label positive, done, zero, nan_result; |
| 3826 | __ fldz(); |
| 3827 | __ fld(1); |
| 3828 | __ FCmp(); |
| 3829 | __ j(below, &nan_result, Label::kNear); |
| 3830 | __ j(equal, &zero, Label::kNear); |
| 3831 | // Positive input. |
| 3832 | // {input, ln2}. |
| 3833 | __ fldln2(); |
| 3834 | // {ln2, input}. |
| 3835 | __ fxch(); |
| 3836 | // {result}. |
| 3837 | __ fyl2x(); |
| 3838 | __ jmp(&done, Label::kNear); |
| 3839 | |
| 3840 | __ bind(&nan_result); |
| 3841 | X87PrepareToWrite(input_reg); |
| 3842 | __ push(Immediate(0xffffffff)); |
| 3843 | __ push(Immediate(0x7fffffff)); |
| 3844 | __ fld_d(MemOperand(esp, 0)); |
| 3845 | __ lea(esp, Operand(esp, kDoubleSize)); |
| 3846 | X87CommitWrite(input_reg); |
| 3847 | __ jmp(&done, Label::kNear); |
| 3848 | |
| 3849 | __ bind(&zero); |
| 3850 | ExternalReference ninf = ExternalReference::address_of_negative_infinity(); |
| 3851 | X87PrepareToWrite(input_reg); |
| 3852 | __ fld_d(Operand::StaticVariable(ninf)); |
| 3853 | X87CommitWrite(input_reg); |
| 3854 | |
| 3855 | __ bind(&done); |
| 3856 | } |
| 3857 | |
| 3858 | |
| 3859 | void LCodeGen::DoMathClz32(LMathClz32* instr) { |
| 3860 | Register input = ToRegister(instr->value()); |
| 3861 | Register result = ToRegister(instr->result()); |
| 3862 | |
| 3863 | __ Lzcnt(result, input); |
| 3864 | } |
| 3865 | |
| 3866 | |
| 3867 | void LCodeGen::DoMathExp(LMathExp* instr) { |
| 3868 | X87Register input = ToX87Register(instr->value()); |
| 3869 | X87Register result_reg = ToX87Register(instr->result()); |
| 3870 | Register temp_result = ToRegister(instr->temp1()); |
| 3871 | Register temp = ToRegister(instr->temp2()); |
| 3872 | Label slow, done, smi, finish; |
| 3873 | DCHECK(result_reg.is(input)); |
| 3874 | |
| 3875 | // Store input into Heap number and call runtime function kMathExpRT. |
| 3876 | if (FLAG_inline_new) { |
| 3877 | __ AllocateHeapNumber(temp_result, temp, no_reg, &slow); |
| 3878 | __ jmp(&done, Label::kNear); |
| 3879 | } |
| 3880 | |
| 3881 | // Slow case: Call the runtime system to do the number allocation. |
| 3882 | __ bind(&slow); |
| 3883 | { |
| 3884 | // TODO(3095996): Put a valid pointer value in the stack slot where the |
| 3885 | // result register is stored, as this register is in the pointer map, but |
| 3886 | // contains an integer value. |
| 3887 | __ Move(temp_result, Immediate(0)); |
| 3888 | |
| 3889 | // Preserve the value of all registers. |
| 3890 | PushSafepointRegistersScope scope(this); |
| 3891 | |
| 3892 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3893 | __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| 3894 | RecordSafepointWithRegisters(instr->pointer_map(), 0, |
| 3895 | Safepoint::kNoLazyDeopt); |
| 3896 | __ StoreToSafepointRegisterSlot(temp_result, eax); |
| 3897 | } |
| 3898 | __ bind(&done); |
| 3899 | X87LoadForUsage(input); |
| 3900 | __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| 3901 | |
| 3902 | { |
| 3903 | // Preserve the value of all registers. |
| 3904 | PushSafepointRegistersScope scope(this); |
| 3905 | |
| 3906 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 3907 | __ push(temp_result); |
| 3908 | __ CallRuntimeSaveDoubles(Runtime::kMathExpRT); |
| 3909 | RecordSafepointWithRegisters(instr->pointer_map(), 1, |
| 3910 | Safepoint::kNoLazyDeopt); |
| 3911 | __ StoreToSafepointRegisterSlot(temp_result, eax); |
| 3912 | } |
| 3913 | X87PrepareToWrite(result_reg); |
| 3914 | // return value of MathExpRT is Smi or Heap Number. |
| 3915 | __ JumpIfSmi(temp_result, &smi); |
| 3916 | // Heap number(double) |
| 3917 | __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| 3918 | __ jmp(&finish); |
| 3919 | // SMI |
| 3920 | __ bind(&smi); |
| 3921 | __ SmiUntag(temp_result); |
| 3922 | __ push(temp_result); |
| 3923 | __ fild_s(MemOperand(esp, 0)); |
| 3924 | __ pop(temp_result); |
| 3925 | __ bind(&finish); |
| 3926 | X87CommitWrite(result_reg); |
| 3927 | } |
| 3928 | |
| 3929 | |
| 3930 | void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) { |
| 3931 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 3932 | DCHECK(ToRegister(instr->function()).is(edi)); |
| 3933 | DCHECK(instr->HasPointerMap()); |
| 3934 | |
| 3935 | Handle<JSFunction> known_function = instr->hydrogen()->known_function(); |
| 3936 | if (known_function.is_null()) { |
| 3937 | LPointerMap* pointers = instr->pointer_map(); |
| 3938 | SafepointGenerator generator( |
| 3939 | this, pointers, Safepoint::kLazyDeopt); |
| 3940 | ParameterCount count(instr->arity()); |
| 3941 | __ InvokeFunction(edi, no_reg, count, CALL_FUNCTION, generator); |
| 3942 | } else { |
| 3943 | CallKnownFunction(known_function, |
| 3944 | instr->hydrogen()->formal_parameter_count(), |
| 3945 | instr->arity(), instr); |
| 3946 | } |
| 3947 | } |
| 3948 | |
| 3949 | |
| 3950 | void LCodeGen::DoCallFunction(LCallFunction* instr) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3951 | HCallFunction* hinstr = instr->hydrogen(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3952 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 3953 | DCHECK(ToRegister(instr->function()).is(edi)); |
| 3954 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 3955 | |
| 3956 | int arity = instr->arity(); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3957 | ConvertReceiverMode mode = hinstr->convert_mode(); |
| 3958 | if (hinstr->HasVectorAndSlot()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3959 | Register slot_register = ToRegister(instr->temp_slot()); |
| 3960 | Register vector_register = ToRegister(instr->temp_vector()); |
| 3961 | DCHECK(slot_register.is(edx)); |
| 3962 | DCHECK(vector_register.is(ebx)); |
| 3963 | |
| 3964 | AllowDeferredHandleDereference vector_structure_check; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 3965 | Handle<TypeFeedbackVector> vector = hinstr->feedback_vector(); |
| 3966 | int index = vector->GetIndex(hinstr->slot()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3967 | |
| 3968 | __ mov(vector_register, vector); |
| 3969 | __ mov(slot_register, Immediate(Smi::FromInt(index))); |
| 3970 | |
| 3971 | Handle<Code> ic = |
| 3972 | CodeFactory::CallICInOptimizedCode(isolate(), arity, mode).code(); |
| 3973 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 3974 | } else { |
| 3975 | __ Set(eax, arity); |
| 3976 | CallCode(isolate()->builtins()->Call(mode), RelocInfo::CODE_TARGET, instr); |
| 3977 | } |
| 3978 | } |
| 3979 | |
| 3980 | |
| 3981 | void LCodeGen::DoCallNewArray(LCallNewArray* instr) { |
| 3982 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 3983 | DCHECK(ToRegister(instr->constructor()).is(edi)); |
| 3984 | DCHECK(ToRegister(instr->result()).is(eax)); |
| 3985 | |
| 3986 | __ Move(eax, Immediate(instr->arity())); |
| 3987 | if (instr->arity() == 1) { |
| 3988 | // We only need the allocation site for the case we have a length argument. |
| 3989 | // The case may bail out to the runtime, which will determine the correct |
| 3990 | // elements kind with the site. |
| 3991 | __ mov(ebx, instr->hydrogen()->site()); |
| 3992 | } else { |
| 3993 | __ mov(ebx, isolate()->factory()->undefined_value()); |
| 3994 | } |
| 3995 | |
| 3996 | ElementsKind kind = instr->hydrogen()->elements_kind(); |
| 3997 | AllocationSiteOverrideMode override_mode = |
| 3998 | (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE) |
| 3999 | ? DISABLE_ALLOCATION_SITES |
| 4000 | : DONT_OVERRIDE; |
| 4001 | |
| 4002 | if (instr->arity() == 0) { |
| 4003 | ArrayNoArgumentConstructorStub stub(isolate(), kind, override_mode); |
| 4004 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 4005 | } else if (instr->arity() == 1) { |
| 4006 | Label done; |
| 4007 | if (IsFastPackedElementsKind(kind)) { |
| 4008 | Label packed_case; |
| 4009 | // We might need a change here |
| 4010 | // look at the first argument |
| 4011 | __ mov(ecx, Operand(esp, 0)); |
| 4012 | __ test(ecx, ecx); |
| 4013 | __ j(zero, &packed_case, Label::kNear); |
| 4014 | |
| 4015 | ElementsKind holey_kind = GetHoleyElementsKind(kind); |
| 4016 | ArraySingleArgumentConstructorStub stub(isolate(), |
| 4017 | holey_kind, |
| 4018 | override_mode); |
| 4019 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 4020 | __ jmp(&done, Label::kNear); |
| 4021 | __ bind(&packed_case); |
| 4022 | } |
| 4023 | |
| 4024 | ArraySingleArgumentConstructorStub stub(isolate(), kind, override_mode); |
| 4025 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 4026 | __ bind(&done); |
| 4027 | } else { |
| 4028 | ArrayNArgumentsConstructorStub stub(isolate(), kind, override_mode); |
| 4029 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 4030 | } |
| 4031 | } |
| 4032 | |
| 4033 | |
| 4034 | void LCodeGen::DoCallRuntime(LCallRuntime* instr) { |
| 4035 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 4036 | CallRuntime(instr->function(), instr->arity(), instr, instr->save_doubles()); |
| 4037 | } |
| 4038 | |
| 4039 | |
| 4040 | void LCodeGen::DoStoreCodeEntry(LStoreCodeEntry* instr) { |
| 4041 | Register function = ToRegister(instr->function()); |
| 4042 | Register code_object = ToRegister(instr->code_object()); |
| 4043 | __ lea(code_object, FieldOperand(code_object, Code::kHeaderSize)); |
| 4044 | __ mov(FieldOperand(function, JSFunction::kCodeEntryOffset), code_object); |
| 4045 | } |
| 4046 | |
| 4047 | |
| 4048 | void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) { |
| 4049 | Register result = ToRegister(instr->result()); |
| 4050 | Register base = ToRegister(instr->base_object()); |
| 4051 | if (instr->offset()->IsConstantOperand()) { |
| 4052 | LConstantOperand* offset = LConstantOperand::cast(instr->offset()); |
| 4053 | __ lea(result, Operand(base, ToInteger32(offset))); |
| 4054 | } else { |
| 4055 | Register offset = ToRegister(instr->offset()); |
| 4056 | __ lea(result, Operand(base, offset, times_1, 0)); |
| 4057 | } |
| 4058 | } |
| 4059 | |
| 4060 | |
| 4061 | void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) { |
| 4062 | Representation representation = instr->hydrogen()->field_representation(); |
| 4063 | |
| 4064 | HObjectAccess access = instr->hydrogen()->access(); |
| 4065 | int offset = access.offset(); |
| 4066 | |
| 4067 | if (access.IsExternalMemory()) { |
| 4068 | DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| 4069 | MemOperand operand = instr->object()->IsConstantOperand() |
| 4070 | ? MemOperand::StaticVariable( |
| 4071 | ToExternalReference(LConstantOperand::cast(instr->object()))) |
| 4072 | : MemOperand(ToRegister(instr->object()), offset); |
| 4073 | if (instr->value()->IsConstantOperand()) { |
| 4074 | LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| 4075 | __ mov(operand, Immediate(ToInteger32(operand_value))); |
| 4076 | } else { |
| 4077 | Register value = ToRegister(instr->value()); |
| 4078 | __ Store(value, operand, representation); |
| 4079 | } |
| 4080 | return; |
| 4081 | } |
| 4082 | |
| 4083 | Register object = ToRegister(instr->object()); |
| 4084 | __ AssertNotSmi(object); |
| 4085 | DCHECK(!representation.IsSmi() || |
| 4086 | !instr->value()->IsConstantOperand() || |
| 4087 | IsSmi(LConstantOperand::cast(instr->value()))); |
| 4088 | if (representation.IsDouble()) { |
| 4089 | DCHECK(access.IsInobject()); |
| 4090 | DCHECK(!instr->hydrogen()->has_transition()); |
| 4091 | DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| 4092 | X87Register value = ToX87Register(instr->value()); |
| 4093 | X87Mov(FieldOperand(object, offset), value); |
| 4094 | return; |
| 4095 | } |
| 4096 | |
| 4097 | if (instr->hydrogen()->has_transition()) { |
| 4098 | Handle<Map> transition = instr->hydrogen()->transition_map(); |
| 4099 | AddDeprecationDependency(transition); |
| 4100 | __ mov(FieldOperand(object, HeapObject::kMapOffset), transition); |
| 4101 | if (instr->hydrogen()->NeedsWriteBarrierForMap()) { |
| 4102 | Register temp = ToRegister(instr->temp()); |
| 4103 | Register temp_map = ToRegister(instr->temp_map()); |
| 4104 | __ mov(temp_map, transition); |
| 4105 | __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map); |
| 4106 | // Update the write barrier for the map field. |
| 4107 | __ RecordWriteForMap(object, transition, temp_map, temp, kSaveFPRegs); |
| 4108 | } |
| 4109 | } |
| 4110 | |
| 4111 | // Do the store. |
| 4112 | Register write_register = object; |
| 4113 | if (!access.IsInobject()) { |
| 4114 | write_register = ToRegister(instr->temp()); |
| 4115 | __ mov(write_register, FieldOperand(object, JSObject::kPropertiesOffset)); |
| 4116 | } |
| 4117 | |
| 4118 | MemOperand operand = FieldOperand(write_register, offset); |
| 4119 | if (instr->value()->IsConstantOperand()) { |
| 4120 | LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| 4121 | if (operand_value->IsRegister()) { |
| 4122 | Register value = ToRegister(operand_value); |
| 4123 | __ Store(value, operand, representation); |
| 4124 | } else if (representation.IsInteger32() || representation.IsExternal()) { |
| 4125 | Immediate immediate = ToImmediate(operand_value, representation); |
| 4126 | DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| 4127 | __ mov(operand, immediate); |
| 4128 | } else { |
| 4129 | Handle<Object> handle_value = ToHandle(operand_value); |
| 4130 | DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| 4131 | __ mov(operand, handle_value); |
| 4132 | } |
| 4133 | } else { |
| 4134 | Register value = ToRegister(instr->value()); |
| 4135 | __ Store(value, operand, representation); |
| 4136 | } |
| 4137 | |
| 4138 | if (instr->hydrogen()->NeedsWriteBarrier()) { |
| 4139 | Register value = ToRegister(instr->value()); |
| 4140 | Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object; |
| 4141 | // Update the write barrier for the object for in-object properties. |
| 4142 | __ RecordWriteField(write_register, offset, value, temp, kSaveFPRegs, |
| 4143 | EMIT_REMEMBERED_SET, |
| 4144 | instr->hydrogen()->SmiCheckForWriteBarrier(), |
| 4145 | instr->hydrogen()->PointersToHereCheckForValue()); |
| 4146 | } |
| 4147 | } |
| 4148 | |
| 4149 | |
| 4150 | void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) { |
| 4151 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 4152 | DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister())); |
| 4153 | DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister())); |
| 4154 | |
| 4155 | if (instr->hydrogen()->HasVectorAndSlot()) { |
| 4156 | EmitVectorStoreICRegisters<LStoreNamedGeneric>(instr); |
| 4157 | } |
| 4158 | |
| 4159 | __ mov(StoreDescriptor::NameRegister(), instr->name()); |
| 4160 | Handle<Code> ic = CodeFactory::StoreICInOptimizedCode( |
| 4161 | isolate(), instr->language_mode(), |
| 4162 | instr->hydrogen()->initialization_state()).code(); |
| 4163 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 4164 | } |
| 4165 | |
| 4166 | |
| 4167 | void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) { |
| 4168 | Condition cc = instr->hydrogen()->allow_equality() ? above : above_equal; |
| 4169 | if (instr->index()->IsConstantOperand()) { |
| 4170 | __ cmp(ToOperand(instr->length()), |
| 4171 | ToImmediate(LConstantOperand::cast(instr->index()), |
| 4172 | instr->hydrogen()->length()->representation())); |
| 4173 | cc = CommuteCondition(cc); |
| 4174 | } else if (instr->length()->IsConstantOperand()) { |
| 4175 | __ cmp(ToOperand(instr->index()), |
| 4176 | ToImmediate(LConstantOperand::cast(instr->length()), |
| 4177 | instr->hydrogen()->index()->representation())); |
| 4178 | } else { |
| 4179 | __ cmp(ToRegister(instr->index()), ToOperand(instr->length())); |
| 4180 | } |
| 4181 | if (FLAG_debug_code && instr->hydrogen()->skip_check()) { |
| 4182 | Label done; |
| 4183 | __ j(NegateCondition(cc), &done, Label::kNear); |
| 4184 | __ int3(); |
| 4185 | __ bind(&done); |
| 4186 | } else { |
| 4187 | DeoptimizeIf(cc, instr, Deoptimizer::kOutOfBounds); |
| 4188 | } |
| 4189 | } |
| 4190 | |
| 4191 | |
| 4192 | void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) { |
| 4193 | ElementsKind elements_kind = instr->elements_kind(); |
| 4194 | LOperand* key = instr->key(); |
| 4195 | if (!key->IsConstantOperand() && |
| 4196 | ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(), |
| 4197 | elements_kind)) { |
| 4198 | __ SmiUntag(ToRegister(key)); |
| 4199 | } |
| 4200 | Operand operand(BuildFastArrayOperand( |
| 4201 | instr->elements(), |
| 4202 | key, |
| 4203 | instr->hydrogen()->key()->representation(), |
| 4204 | elements_kind, |
| 4205 | instr->base_offset())); |
| 4206 | if (elements_kind == FLOAT32_ELEMENTS) { |
| 4207 | X87Mov(operand, ToX87Register(instr->value()), kX87FloatOperand); |
| 4208 | } else if (elements_kind == FLOAT64_ELEMENTS) { |
| 4209 | uint64_t int_val = kHoleNanInt64; |
| 4210 | int32_t lower = static_cast<int32_t>(int_val); |
| 4211 | int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt)); |
| 4212 | Operand operand2 = BuildFastArrayOperand( |
| 4213 | instr->elements(), instr->key(), |
| 4214 | instr->hydrogen()->key()->representation(), elements_kind, |
| 4215 | instr->base_offset() + kPointerSize); |
| 4216 | |
| 4217 | Label no_special_nan_handling, done; |
| 4218 | X87Register value = ToX87Register(instr->value()); |
| 4219 | X87Fxch(value); |
| 4220 | __ lea(esp, Operand(esp, -kDoubleSize)); |
| 4221 | __ fst_d(MemOperand(esp, 0)); |
| 4222 | __ lea(esp, Operand(esp, kDoubleSize)); |
| 4223 | int offset = sizeof(kHoleNanUpper32); |
| 4224 | // x87 converts sNaN(0xfff7fffffff7ffff) to QNaN(0xfffffffffff7ffff), |
| 4225 | // so we check the upper with 0xffffffff for hole as a temporary fix. |
| 4226 | __ cmp(MemOperand(esp, -offset), Immediate(0xffffffff)); |
| 4227 | __ j(not_equal, &no_special_nan_handling, Label::kNear); |
| 4228 | __ mov(operand, Immediate(lower)); |
| 4229 | __ mov(operand2, Immediate(upper)); |
| 4230 | __ jmp(&done, Label::kNear); |
| 4231 | |
| 4232 | __ bind(&no_special_nan_handling); |
| 4233 | __ fst_d(operand); |
| 4234 | __ bind(&done); |
| 4235 | } else { |
| 4236 | Register value = ToRegister(instr->value()); |
| 4237 | switch (elements_kind) { |
| 4238 | case UINT8_ELEMENTS: |
| 4239 | case INT8_ELEMENTS: |
| 4240 | case UINT8_CLAMPED_ELEMENTS: |
| 4241 | __ mov_b(operand, value); |
| 4242 | break; |
| 4243 | case UINT16_ELEMENTS: |
| 4244 | case INT16_ELEMENTS: |
| 4245 | __ mov_w(operand, value); |
| 4246 | break; |
| 4247 | case UINT32_ELEMENTS: |
| 4248 | case INT32_ELEMENTS: |
| 4249 | __ mov(operand, value); |
| 4250 | break; |
| 4251 | case FLOAT32_ELEMENTS: |
| 4252 | case FLOAT64_ELEMENTS: |
| 4253 | case FAST_SMI_ELEMENTS: |
| 4254 | case FAST_ELEMENTS: |
| 4255 | case FAST_DOUBLE_ELEMENTS: |
| 4256 | case FAST_HOLEY_SMI_ELEMENTS: |
| 4257 | case FAST_HOLEY_ELEMENTS: |
| 4258 | case FAST_HOLEY_DOUBLE_ELEMENTS: |
| 4259 | case DICTIONARY_ELEMENTS: |
| 4260 | case FAST_SLOPPY_ARGUMENTS_ELEMENTS: |
| 4261 | case SLOW_SLOPPY_ARGUMENTS_ELEMENTS: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 4262 | case FAST_STRING_WRAPPER_ELEMENTS: |
| 4263 | case SLOW_STRING_WRAPPER_ELEMENTS: |
| 4264 | case NO_ELEMENTS: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4265 | UNREACHABLE(); |
| 4266 | break; |
| 4267 | } |
| 4268 | } |
| 4269 | } |
| 4270 | |
| 4271 | |
| 4272 | void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) { |
| 4273 | Operand double_store_operand = BuildFastArrayOperand( |
| 4274 | instr->elements(), |
| 4275 | instr->key(), |
| 4276 | instr->hydrogen()->key()->representation(), |
| 4277 | FAST_DOUBLE_ELEMENTS, |
| 4278 | instr->base_offset()); |
| 4279 | |
| 4280 | uint64_t int_val = kHoleNanInt64; |
| 4281 | int32_t lower = static_cast<int32_t>(int_val); |
| 4282 | int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt)); |
| 4283 | Operand double_store_operand2 = BuildFastArrayOperand( |
| 4284 | instr->elements(), instr->key(), |
| 4285 | instr->hydrogen()->key()->representation(), FAST_DOUBLE_ELEMENTS, |
| 4286 | instr->base_offset() + kPointerSize); |
| 4287 | |
| 4288 | if (instr->hydrogen()->IsConstantHoleStore()) { |
| 4289 | // This means we should store the (double) hole. No floating point |
| 4290 | // registers required. |
| 4291 | __ mov(double_store_operand, Immediate(lower)); |
| 4292 | __ mov(double_store_operand2, Immediate(upper)); |
| 4293 | } else { |
| 4294 | Label no_special_nan_handling, done; |
| 4295 | X87Register value = ToX87Register(instr->value()); |
| 4296 | X87Fxch(value); |
| 4297 | |
| 4298 | if (instr->NeedsCanonicalization()) { |
| 4299 | __ fld(0); |
| 4300 | __ fld(0); |
| 4301 | __ FCmp(); |
| 4302 | __ j(parity_odd, &no_special_nan_handling, Label::kNear); |
| 4303 | // All NaNs are Canonicalized to 0x7fffffffffffffff |
| 4304 | __ mov(double_store_operand, Immediate(0xffffffff)); |
| 4305 | __ mov(double_store_operand2, Immediate(0x7fffffff)); |
| 4306 | __ jmp(&done, Label::kNear); |
| 4307 | } else { |
| 4308 | __ lea(esp, Operand(esp, -kDoubleSize)); |
| 4309 | __ fst_d(MemOperand(esp, 0)); |
| 4310 | __ lea(esp, Operand(esp, kDoubleSize)); |
| 4311 | int offset = sizeof(kHoleNanUpper32); |
| 4312 | // x87 converts sNaN(0xfff7fffffff7ffff) to QNaN(0xfffffffffff7ffff), |
| 4313 | // so we check the upper with 0xffffffff for hole as a temporary fix. |
| 4314 | __ cmp(MemOperand(esp, -offset), Immediate(0xffffffff)); |
| 4315 | __ j(not_equal, &no_special_nan_handling, Label::kNear); |
| 4316 | __ mov(double_store_operand, Immediate(lower)); |
| 4317 | __ mov(double_store_operand2, Immediate(upper)); |
| 4318 | __ jmp(&done, Label::kNear); |
| 4319 | } |
| 4320 | __ bind(&no_special_nan_handling); |
| 4321 | __ fst_d(double_store_operand); |
| 4322 | __ bind(&done); |
| 4323 | } |
| 4324 | } |
| 4325 | |
| 4326 | |
| 4327 | void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) { |
| 4328 | Register elements = ToRegister(instr->elements()); |
| 4329 | Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg; |
| 4330 | |
| 4331 | Operand operand = BuildFastArrayOperand( |
| 4332 | instr->elements(), |
| 4333 | instr->key(), |
| 4334 | instr->hydrogen()->key()->representation(), |
| 4335 | FAST_ELEMENTS, |
| 4336 | instr->base_offset()); |
| 4337 | if (instr->value()->IsRegister()) { |
| 4338 | __ mov(operand, ToRegister(instr->value())); |
| 4339 | } else { |
| 4340 | LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| 4341 | if (IsSmi(operand_value)) { |
| 4342 | Immediate immediate = ToImmediate(operand_value, Representation::Smi()); |
| 4343 | __ mov(operand, immediate); |
| 4344 | } else { |
| 4345 | DCHECK(!IsInteger32(operand_value)); |
| 4346 | Handle<Object> handle_value = ToHandle(operand_value); |
| 4347 | __ mov(operand, handle_value); |
| 4348 | } |
| 4349 | } |
| 4350 | |
| 4351 | if (instr->hydrogen()->NeedsWriteBarrier()) { |
| 4352 | DCHECK(instr->value()->IsRegister()); |
| 4353 | Register value = ToRegister(instr->value()); |
| 4354 | DCHECK(!instr->key()->IsConstantOperand()); |
| 4355 | SmiCheck check_needed = |
| 4356 | instr->hydrogen()->value()->type().IsHeapObject() |
| 4357 | ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| 4358 | // Compute address of modified element and store it into key register. |
| 4359 | __ lea(key, operand); |
| 4360 | __ RecordWrite(elements, key, value, kSaveFPRegs, EMIT_REMEMBERED_SET, |
| 4361 | check_needed, |
| 4362 | instr->hydrogen()->PointersToHereCheckForValue()); |
| 4363 | } |
| 4364 | } |
| 4365 | |
| 4366 | |
| 4367 | void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) { |
| 4368 | // By cases...external, fast-double, fast |
| 4369 | if (instr->is_fixed_typed_array()) { |
| 4370 | DoStoreKeyedExternalArray(instr); |
| 4371 | } else if (instr->hydrogen()->value()->representation().IsDouble()) { |
| 4372 | DoStoreKeyedFixedDoubleArray(instr); |
| 4373 | } else { |
| 4374 | DoStoreKeyedFixedArray(instr); |
| 4375 | } |
| 4376 | } |
| 4377 | |
| 4378 | |
| 4379 | void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) { |
| 4380 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 4381 | DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister())); |
| 4382 | DCHECK(ToRegister(instr->key()).is(StoreDescriptor::NameRegister())); |
| 4383 | DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister())); |
| 4384 | |
| 4385 | if (instr->hydrogen()->HasVectorAndSlot()) { |
| 4386 | EmitVectorStoreICRegisters<LStoreKeyedGeneric>(instr); |
| 4387 | } |
| 4388 | |
| 4389 | Handle<Code> ic = CodeFactory::KeyedStoreICInOptimizedCode( |
| 4390 | isolate(), instr->language_mode(), |
| 4391 | instr->hydrogen()->initialization_state()).code(); |
| 4392 | CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| 4393 | } |
| 4394 | |
| 4395 | |
| 4396 | void LCodeGen::DoTrapAllocationMemento(LTrapAllocationMemento* instr) { |
| 4397 | Register object = ToRegister(instr->object()); |
| 4398 | Register temp = ToRegister(instr->temp()); |
| 4399 | Label no_memento_found; |
| 4400 | __ TestJSArrayForAllocationMemento(object, temp, &no_memento_found); |
| 4401 | DeoptimizeIf(equal, instr, Deoptimizer::kMementoFound); |
| 4402 | __ bind(&no_memento_found); |
| 4403 | } |
| 4404 | |
| 4405 | |
| 4406 | void LCodeGen::DoMaybeGrowElements(LMaybeGrowElements* instr) { |
| 4407 | class DeferredMaybeGrowElements final : public LDeferredCode { |
| 4408 | public: |
| 4409 | DeferredMaybeGrowElements(LCodeGen* codegen, |
| 4410 | LMaybeGrowElements* instr, |
| 4411 | const X87Stack& x87_stack) |
| 4412 | : LDeferredCode(codegen, x87_stack), instr_(instr) {} |
| 4413 | void Generate() override { codegen()->DoDeferredMaybeGrowElements(instr_); } |
| 4414 | LInstruction* instr() override { return instr_; } |
| 4415 | |
| 4416 | private: |
| 4417 | LMaybeGrowElements* instr_; |
| 4418 | }; |
| 4419 | |
| 4420 | Register result = eax; |
| 4421 | DeferredMaybeGrowElements* deferred = |
| 4422 | new (zone()) DeferredMaybeGrowElements(this, instr, x87_stack_); |
| 4423 | LOperand* key = instr->key(); |
| 4424 | LOperand* current_capacity = instr->current_capacity(); |
| 4425 | |
| 4426 | DCHECK(instr->hydrogen()->key()->representation().IsInteger32()); |
| 4427 | DCHECK(instr->hydrogen()->current_capacity()->representation().IsInteger32()); |
| 4428 | DCHECK(key->IsConstantOperand() || key->IsRegister()); |
| 4429 | DCHECK(current_capacity->IsConstantOperand() || |
| 4430 | current_capacity->IsRegister()); |
| 4431 | |
| 4432 | if (key->IsConstantOperand() && current_capacity->IsConstantOperand()) { |
| 4433 | int32_t constant_key = ToInteger32(LConstantOperand::cast(key)); |
| 4434 | int32_t constant_capacity = |
| 4435 | ToInteger32(LConstantOperand::cast(current_capacity)); |
| 4436 | if (constant_key >= constant_capacity) { |
| 4437 | // Deferred case. |
| 4438 | __ jmp(deferred->entry()); |
| 4439 | } |
| 4440 | } else if (key->IsConstantOperand()) { |
| 4441 | int32_t constant_key = ToInteger32(LConstantOperand::cast(key)); |
| 4442 | __ cmp(ToOperand(current_capacity), Immediate(constant_key)); |
| 4443 | __ j(less_equal, deferred->entry()); |
| 4444 | } else if (current_capacity->IsConstantOperand()) { |
| 4445 | int32_t constant_capacity = |
| 4446 | ToInteger32(LConstantOperand::cast(current_capacity)); |
| 4447 | __ cmp(ToRegister(key), Immediate(constant_capacity)); |
| 4448 | __ j(greater_equal, deferred->entry()); |
| 4449 | } else { |
| 4450 | __ cmp(ToRegister(key), ToRegister(current_capacity)); |
| 4451 | __ j(greater_equal, deferred->entry()); |
| 4452 | } |
| 4453 | |
| 4454 | __ mov(result, ToOperand(instr->elements())); |
| 4455 | __ bind(deferred->exit()); |
| 4456 | } |
| 4457 | |
| 4458 | |
| 4459 | void LCodeGen::DoDeferredMaybeGrowElements(LMaybeGrowElements* instr) { |
| 4460 | // TODO(3095996): Get rid of this. For now, we need to make the |
| 4461 | // result register contain a valid pointer because it is already |
| 4462 | // contained in the register pointer map. |
| 4463 | Register result = eax; |
| 4464 | __ Move(result, Immediate(0)); |
| 4465 | |
| 4466 | // We have to call a stub. |
| 4467 | { |
| 4468 | PushSafepointRegistersScope scope(this); |
| 4469 | if (instr->object()->IsRegister()) { |
| 4470 | __ Move(result, ToRegister(instr->object())); |
| 4471 | } else { |
| 4472 | __ mov(result, ToOperand(instr->object())); |
| 4473 | } |
| 4474 | |
| 4475 | LOperand* key = instr->key(); |
| 4476 | if (key->IsConstantOperand()) { |
| 4477 | __ mov(ebx, ToImmediate(key, Representation::Smi())); |
| 4478 | } else { |
| 4479 | __ Move(ebx, ToRegister(key)); |
| 4480 | __ SmiTag(ebx); |
| 4481 | } |
| 4482 | |
| 4483 | GrowArrayElementsStub stub(isolate(), instr->hydrogen()->is_js_array(), |
| 4484 | instr->hydrogen()->kind()); |
| 4485 | __ CallStub(&stub); |
| 4486 | RecordSafepointWithLazyDeopt( |
| 4487 | instr, RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| 4488 | __ StoreToSafepointRegisterSlot(result, result); |
| 4489 | } |
| 4490 | |
| 4491 | // Deopt on smi, which means the elements array changed to dictionary mode. |
| 4492 | __ test(result, Immediate(kSmiTagMask)); |
| 4493 | DeoptimizeIf(equal, instr, Deoptimizer::kSmi); |
| 4494 | } |
| 4495 | |
| 4496 | |
| 4497 | void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) { |
| 4498 | Register object_reg = ToRegister(instr->object()); |
| 4499 | |
| 4500 | Handle<Map> from_map = instr->original_map(); |
| 4501 | Handle<Map> to_map = instr->transitioned_map(); |
| 4502 | ElementsKind from_kind = instr->from_kind(); |
| 4503 | ElementsKind to_kind = instr->to_kind(); |
| 4504 | |
| 4505 | Label not_applicable; |
| 4506 | bool is_simple_map_transition = |
| 4507 | IsSimpleMapChangeTransition(from_kind, to_kind); |
| 4508 | Label::Distance branch_distance = |
| 4509 | is_simple_map_transition ? Label::kNear : Label::kFar; |
| 4510 | __ cmp(FieldOperand(object_reg, HeapObject::kMapOffset), from_map); |
| 4511 | __ j(not_equal, ¬_applicable, branch_distance); |
| 4512 | if (is_simple_map_transition) { |
| 4513 | Register new_map_reg = ToRegister(instr->new_map_temp()); |
| 4514 | __ mov(FieldOperand(object_reg, HeapObject::kMapOffset), |
| 4515 | Immediate(to_map)); |
| 4516 | // Write barrier. |
| 4517 | DCHECK_NOT_NULL(instr->temp()); |
| 4518 | __ RecordWriteForMap(object_reg, to_map, new_map_reg, |
| 4519 | ToRegister(instr->temp()), kDontSaveFPRegs); |
| 4520 | } else { |
| 4521 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 4522 | DCHECK(object_reg.is(eax)); |
| 4523 | PushSafepointRegistersScope scope(this); |
| 4524 | __ mov(ebx, to_map); |
| 4525 | bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE; |
| 4526 | TransitionElementsKindStub stub(isolate(), from_kind, to_kind, is_js_array); |
| 4527 | __ CallStub(&stub); |
| 4528 | RecordSafepointWithLazyDeopt(instr, |
| 4529 | RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| 4530 | } |
| 4531 | __ bind(¬_applicable); |
| 4532 | } |
| 4533 | |
| 4534 | |
| 4535 | void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) { |
| 4536 | class DeferredStringCharCodeAt final : public LDeferredCode { |
| 4537 | public: |
| 4538 | DeferredStringCharCodeAt(LCodeGen* codegen, |
| 4539 | LStringCharCodeAt* instr, |
| 4540 | const X87Stack& x87_stack) |
| 4541 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 4542 | void Generate() override { codegen()->DoDeferredStringCharCodeAt(instr_); } |
| 4543 | LInstruction* instr() override { return instr_; } |
| 4544 | |
| 4545 | private: |
| 4546 | LStringCharCodeAt* instr_; |
| 4547 | }; |
| 4548 | |
| 4549 | DeferredStringCharCodeAt* deferred = |
| 4550 | new(zone()) DeferredStringCharCodeAt(this, instr, x87_stack_); |
| 4551 | |
| 4552 | StringCharLoadGenerator::Generate(masm(), |
| 4553 | factory(), |
| 4554 | ToRegister(instr->string()), |
| 4555 | ToRegister(instr->index()), |
| 4556 | ToRegister(instr->result()), |
| 4557 | deferred->entry()); |
| 4558 | __ bind(deferred->exit()); |
| 4559 | } |
| 4560 | |
| 4561 | |
| 4562 | void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) { |
| 4563 | Register string = ToRegister(instr->string()); |
| 4564 | Register result = ToRegister(instr->result()); |
| 4565 | |
| 4566 | // TODO(3095996): Get rid of this. For now, we need to make the |
| 4567 | // result register contain a valid pointer because it is already |
| 4568 | // contained in the register pointer map. |
| 4569 | __ Move(result, Immediate(0)); |
| 4570 | |
| 4571 | PushSafepointRegistersScope scope(this); |
| 4572 | __ push(string); |
| 4573 | // Push the index as a smi. This is safe because of the checks in |
| 4574 | // DoStringCharCodeAt above. |
| 4575 | STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue); |
| 4576 | if (instr->index()->IsConstantOperand()) { |
| 4577 | Immediate immediate = ToImmediate(LConstantOperand::cast(instr->index()), |
| 4578 | Representation::Smi()); |
| 4579 | __ push(immediate); |
| 4580 | } else { |
| 4581 | Register index = ToRegister(instr->index()); |
| 4582 | __ SmiTag(index); |
| 4583 | __ push(index); |
| 4584 | } |
| 4585 | CallRuntimeFromDeferred(Runtime::kStringCharCodeAtRT, 2, |
| 4586 | instr, instr->context()); |
| 4587 | __ AssertSmi(eax); |
| 4588 | __ SmiUntag(eax); |
| 4589 | __ StoreToSafepointRegisterSlot(result, eax); |
| 4590 | } |
| 4591 | |
| 4592 | |
| 4593 | void LCodeGen::DoStringCharFromCode(LStringCharFromCode* instr) { |
| 4594 | class DeferredStringCharFromCode final : public LDeferredCode { |
| 4595 | public: |
| 4596 | DeferredStringCharFromCode(LCodeGen* codegen, |
| 4597 | LStringCharFromCode* instr, |
| 4598 | const X87Stack& x87_stack) |
| 4599 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 4600 | void Generate() override { |
| 4601 | codegen()->DoDeferredStringCharFromCode(instr_); |
| 4602 | } |
| 4603 | LInstruction* instr() override { return instr_; } |
| 4604 | |
| 4605 | private: |
| 4606 | LStringCharFromCode* instr_; |
| 4607 | }; |
| 4608 | |
| 4609 | DeferredStringCharFromCode* deferred = |
| 4610 | new(zone()) DeferredStringCharFromCode(this, instr, x87_stack_); |
| 4611 | |
| 4612 | DCHECK(instr->hydrogen()->value()->representation().IsInteger32()); |
| 4613 | Register char_code = ToRegister(instr->char_code()); |
| 4614 | Register result = ToRegister(instr->result()); |
| 4615 | DCHECK(!char_code.is(result)); |
| 4616 | |
| 4617 | __ cmp(char_code, String::kMaxOneByteCharCode); |
| 4618 | __ j(above, deferred->entry()); |
| 4619 | __ Move(result, Immediate(factory()->single_character_string_cache())); |
| 4620 | __ mov(result, FieldOperand(result, |
| 4621 | char_code, times_pointer_size, |
| 4622 | FixedArray::kHeaderSize)); |
| 4623 | __ cmp(result, factory()->undefined_value()); |
| 4624 | __ j(equal, deferred->entry()); |
| 4625 | __ bind(deferred->exit()); |
| 4626 | } |
| 4627 | |
| 4628 | |
| 4629 | void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) { |
| 4630 | Register char_code = ToRegister(instr->char_code()); |
| 4631 | Register result = ToRegister(instr->result()); |
| 4632 | |
| 4633 | // TODO(3095996): Get rid of this. For now, we need to make the |
| 4634 | // result register contain a valid pointer because it is already |
| 4635 | // contained in the register pointer map. |
| 4636 | __ Move(result, Immediate(0)); |
| 4637 | |
| 4638 | PushSafepointRegistersScope scope(this); |
| 4639 | __ SmiTag(char_code); |
| 4640 | __ push(char_code); |
| 4641 | CallRuntimeFromDeferred(Runtime::kStringCharFromCode, 1, instr, |
| 4642 | instr->context()); |
| 4643 | __ StoreToSafepointRegisterSlot(result, eax); |
| 4644 | } |
| 4645 | |
| 4646 | |
| 4647 | void LCodeGen::DoStringAdd(LStringAdd* instr) { |
| 4648 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 4649 | DCHECK(ToRegister(instr->left()).is(edx)); |
| 4650 | DCHECK(ToRegister(instr->right()).is(eax)); |
| 4651 | StringAddStub stub(isolate(), |
| 4652 | instr->hydrogen()->flags(), |
| 4653 | instr->hydrogen()->pretenure_flag()); |
| 4654 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 4655 | } |
| 4656 | |
| 4657 | |
| 4658 | void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) { |
| 4659 | LOperand* input = instr->value(); |
| 4660 | LOperand* output = instr->result(); |
| 4661 | DCHECK(input->IsRegister() || input->IsStackSlot()); |
| 4662 | DCHECK(output->IsDoubleRegister()); |
| 4663 | if (input->IsRegister()) { |
| 4664 | Register input_reg = ToRegister(input); |
| 4665 | __ push(input_reg); |
| 4666 | X87Mov(ToX87Register(output), Operand(esp, 0), kX87IntOperand); |
| 4667 | __ pop(input_reg); |
| 4668 | } else { |
| 4669 | X87Mov(ToX87Register(output), ToOperand(input), kX87IntOperand); |
| 4670 | } |
| 4671 | } |
| 4672 | |
| 4673 | |
| 4674 | void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) { |
| 4675 | LOperand* input = instr->value(); |
| 4676 | LOperand* output = instr->result(); |
| 4677 | X87Register res = ToX87Register(output); |
| 4678 | X87PrepareToWrite(res); |
| 4679 | __ LoadUint32NoSSE2(ToRegister(input)); |
| 4680 | X87CommitWrite(res); |
| 4681 | } |
| 4682 | |
| 4683 | |
| 4684 | void LCodeGen::DoNumberTagI(LNumberTagI* instr) { |
| 4685 | class DeferredNumberTagI final : public LDeferredCode { |
| 4686 | public: |
| 4687 | DeferredNumberTagI(LCodeGen* codegen, |
| 4688 | LNumberTagI* instr, |
| 4689 | const X87Stack& x87_stack) |
| 4690 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 4691 | void Generate() override { |
| 4692 | codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp(), |
| 4693 | SIGNED_INT32); |
| 4694 | } |
| 4695 | LInstruction* instr() override { return instr_; } |
| 4696 | |
| 4697 | private: |
| 4698 | LNumberTagI* instr_; |
| 4699 | }; |
| 4700 | |
| 4701 | LOperand* input = instr->value(); |
| 4702 | DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| 4703 | Register reg = ToRegister(input); |
| 4704 | |
| 4705 | DeferredNumberTagI* deferred = |
| 4706 | new(zone()) DeferredNumberTagI(this, instr, x87_stack_); |
| 4707 | __ SmiTag(reg); |
| 4708 | __ j(overflow, deferred->entry()); |
| 4709 | __ bind(deferred->exit()); |
| 4710 | } |
| 4711 | |
| 4712 | |
| 4713 | void LCodeGen::DoNumberTagU(LNumberTagU* instr) { |
| 4714 | class DeferredNumberTagU final : public LDeferredCode { |
| 4715 | public: |
| 4716 | DeferredNumberTagU(LCodeGen* codegen, |
| 4717 | LNumberTagU* instr, |
| 4718 | const X87Stack& x87_stack) |
| 4719 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 4720 | void Generate() override { |
| 4721 | codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp(), |
| 4722 | UNSIGNED_INT32); |
| 4723 | } |
| 4724 | LInstruction* instr() override { return instr_; } |
| 4725 | |
| 4726 | private: |
| 4727 | LNumberTagU* instr_; |
| 4728 | }; |
| 4729 | |
| 4730 | LOperand* input = instr->value(); |
| 4731 | DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| 4732 | Register reg = ToRegister(input); |
| 4733 | |
| 4734 | DeferredNumberTagU* deferred = |
| 4735 | new(zone()) DeferredNumberTagU(this, instr, x87_stack_); |
| 4736 | __ cmp(reg, Immediate(Smi::kMaxValue)); |
| 4737 | __ j(above, deferred->entry()); |
| 4738 | __ SmiTag(reg); |
| 4739 | __ bind(deferred->exit()); |
| 4740 | } |
| 4741 | |
| 4742 | |
| 4743 | void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr, |
| 4744 | LOperand* value, |
| 4745 | LOperand* temp, |
| 4746 | IntegerSignedness signedness) { |
| 4747 | Label done, slow; |
| 4748 | Register reg = ToRegister(value); |
| 4749 | Register tmp = ToRegister(temp); |
| 4750 | |
| 4751 | if (signedness == SIGNED_INT32) { |
| 4752 | // There was overflow, so bits 30 and 31 of the original integer |
| 4753 | // disagree. Try to allocate a heap number in new space and store |
| 4754 | // the value in there. If that fails, call the runtime system. |
| 4755 | __ SmiUntag(reg); |
| 4756 | __ xor_(reg, 0x80000000); |
| 4757 | __ push(reg); |
| 4758 | __ fild_s(Operand(esp, 0)); |
| 4759 | __ pop(reg); |
| 4760 | } else { |
| 4761 | // There's no fild variant for unsigned values, so zero-extend to a 64-bit |
| 4762 | // int manually. |
| 4763 | __ push(Immediate(0)); |
| 4764 | __ push(reg); |
| 4765 | __ fild_d(Operand(esp, 0)); |
| 4766 | __ pop(reg); |
| 4767 | __ pop(reg); |
| 4768 | } |
| 4769 | |
| 4770 | if (FLAG_inline_new) { |
| 4771 | __ AllocateHeapNumber(reg, tmp, no_reg, &slow); |
| 4772 | __ jmp(&done, Label::kNear); |
| 4773 | } |
| 4774 | |
| 4775 | // Slow case: Call the runtime system to do the number allocation. |
| 4776 | __ bind(&slow); |
| 4777 | { |
| 4778 | // TODO(3095996): Put a valid pointer value in the stack slot where the |
| 4779 | // result register is stored, as this register is in the pointer map, but |
| 4780 | // contains an integer value. |
| 4781 | __ Move(reg, Immediate(0)); |
| 4782 | |
| 4783 | // Preserve the value of all registers. |
| 4784 | PushSafepointRegistersScope scope(this); |
| 4785 | |
| 4786 | // NumberTagI and NumberTagD use the context from the frame, rather than |
| 4787 | // the environment's HContext or HInlinedContext value. |
| 4788 | // They only call Runtime::kAllocateHeapNumber. |
| 4789 | // The corresponding HChange instructions are added in a phase that does |
| 4790 | // not have easy access to the local context. |
| 4791 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4792 | __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| 4793 | RecordSafepointWithRegisters( |
| 4794 | instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| 4795 | __ StoreToSafepointRegisterSlot(reg, eax); |
| 4796 | } |
| 4797 | |
| 4798 | __ bind(&done); |
| 4799 | __ fstp_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| 4800 | } |
| 4801 | |
| 4802 | |
| 4803 | void LCodeGen::DoNumberTagD(LNumberTagD* instr) { |
| 4804 | class DeferredNumberTagD final : public LDeferredCode { |
| 4805 | public: |
| 4806 | DeferredNumberTagD(LCodeGen* codegen, |
| 4807 | LNumberTagD* instr, |
| 4808 | const X87Stack& x87_stack) |
| 4809 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 4810 | void Generate() override { codegen()->DoDeferredNumberTagD(instr_); } |
| 4811 | LInstruction* instr() override { return instr_; } |
| 4812 | |
| 4813 | private: |
| 4814 | LNumberTagD* instr_; |
| 4815 | }; |
| 4816 | |
| 4817 | Register reg = ToRegister(instr->result()); |
| 4818 | |
| 4819 | // Put the value to the top of stack |
| 4820 | X87Register src = ToX87Register(instr->value()); |
| 4821 | // Don't use X87LoadForUsage here, which is only used by Instruction which |
| 4822 | // clobbers fp registers. |
| 4823 | x87_stack_.Fxch(src); |
| 4824 | |
| 4825 | DeferredNumberTagD* deferred = |
| 4826 | new(zone()) DeferredNumberTagD(this, instr, x87_stack_); |
| 4827 | if (FLAG_inline_new) { |
| 4828 | Register tmp = ToRegister(instr->temp()); |
| 4829 | __ AllocateHeapNumber(reg, tmp, no_reg, deferred->entry()); |
| 4830 | } else { |
| 4831 | __ jmp(deferred->entry()); |
| 4832 | } |
| 4833 | __ bind(deferred->exit()); |
| 4834 | __ fst_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| 4835 | } |
| 4836 | |
| 4837 | |
| 4838 | void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) { |
| 4839 | // TODO(3095996): Get rid of this. For now, we need to make the |
| 4840 | // result register contain a valid pointer because it is already |
| 4841 | // contained in the register pointer map. |
| 4842 | Register reg = ToRegister(instr->result()); |
| 4843 | __ Move(reg, Immediate(0)); |
| 4844 | |
| 4845 | PushSafepointRegistersScope scope(this); |
| 4846 | // NumberTagI and NumberTagD use the context from the frame, rather than |
| 4847 | // the environment's HContext or HInlinedContext value. |
| 4848 | // They only call Runtime::kAllocateHeapNumber. |
| 4849 | // The corresponding HChange instructions are added in a phase that does |
| 4850 | // not have easy access to the local context. |
| 4851 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 4852 | __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| 4853 | RecordSafepointWithRegisters( |
| 4854 | instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| 4855 | __ StoreToSafepointRegisterSlot(reg, eax); |
| 4856 | } |
| 4857 | |
| 4858 | |
| 4859 | void LCodeGen::DoSmiTag(LSmiTag* instr) { |
| 4860 | HChange* hchange = instr->hydrogen(); |
| 4861 | Register input = ToRegister(instr->value()); |
| 4862 | if (hchange->CheckFlag(HValue::kCanOverflow) && |
| 4863 | hchange->value()->CheckFlag(HValue::kUint32)) { |
| 4864 | __ test(input, Immediate(0xc0000000)); |
| 4865 | DeoptimizeIf(not_zero, instr, Deoptimizer::kOverflow); |
| 4866 | } |
| 4867 | __ SmiTag(input); |
| 4868 | if (hchange->CheckFlag(HValue::kCanOverflow) && |
| 4869 | !hchange->value()->CheckFlag(HValue::kUint32)) { |
| 4870 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 4871 | } |
| 4872 | } |
| 4873 | |
| 4874 | |
| 4875 | void LCodeGen::DoSmiUntag(LSmiUntag* instr) { |
| 4876 | LOperand* input = instr->value(); |
| 4877 | Register result = ToRegister(input); |
| 4878 | DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| 4879 | if (instr->needs_check()) { |
| 4880 | __ test(result, Immediate(kSmiTagMask)); |
| 4881 | DeoptimizeIf(not_zero, instr, Deoptimizer::kNotASmi); |
| 4882 | } else { |
| 4883 | __ AssertSmi(result); |
| 4884 | } |
| 4885 | __ SmiUntag(result); |
| 4886 | } |
| 4887 | |
| 4888 | |
| 4889 | void LCodeGen::EmitNumberUntagDNoSSE2(LNumberUntagD* instr, Register input_reg, |
| 4890 | Register temp_reg, X87Register res_reg, |
| 4891 | NumberUntagDMode mode) { |
| 4892 | bool can_convert_undefined_to_nan = |
| 4893 | instr->hydrogen()->can_convert_undefined_to_nan(); |
| 4894 | bool deoptimize_on_minus_zero = instr->hydrogen()->deoptimize_on_minus_zero(); |
| 4895 | |
| 4896 | Label load_smi, done; |
| 4897 | |
| 4898 | X87PrepareToWrite(res_reg); |
| 4899 | if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED) { |
| 4900 | // Smi check. |
| 4901 | __ JumpIfSmi(input_reg, &load_smi); |
| 4902 | |
| 4903 | // Heap number map check. |
| 4904 | __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| 4905 | factory()->heap_number_map()); |
| 4906 | if (!can_convert_undefined_to_nan) { |
| 4907 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); |
| 4908 | } else { |
| 4909 | Label heap_number, convert; |
| 4910 | __ j(equal, &heap_number); |
| 4911 | |
| 4912 | // Convert undefined (or hole) to NaN. |
| 4913 | __ cmp(input_reg, factory()->undefined_value()); |
| 4914 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumberUndefined); |
| 4915 | |
| 4916 | __ bind(&convert); |
| 4917 | __ push(Immediate(0xffffffff)); |
| 4918 | __ push(Immediate(0x7fffffff)); |
| 4919 | __ fld_d(MemOperand(esp, 0)); |
| 4920 | __ lea(esp, Operand(esp, kDoubleSize)); |
| 4921 | __ jmp(&done, Label::kNear); |
| 4922 | |
| 4923 | __ bind(&heap_number); |
| 4924 | } |
| 4925 | // Heap number to x87 conversion. |
| 4926 | __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| 4927 | if (deoptimize_on_minus_zero) { |
| 4928 | __ fldz(); |
| 4929 | __ FCmp(); |
| 4930 | __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| 4931 | __ j(not_zero, &done, Label::kNear); |
| 4932 | |
| 4933 | // Use general purpose registers to check if we have -0.0 |
| 4934 | __ mov(temp_reg, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| 4935 | __ test(temp_reg, Immediate(HeapNumber::kSignMask)); |
| 4936 | __ j(zero, &done, Label::kNear); |
| 4937 | |
| 4938 | // Pop FPU stack before deoptimizing. |
| 4939 | __ fstp(0); |
| 4940 | DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero); |
| 4941 | } |
| 4942 | __ jmp(&done, Label::kNear); |
| 4943 | } else { |
| 4944 | DCHECK(mode == NUMBER_CANDIDATE_IS_SMI); |
| 4945 | } |
| 4946 | |
| 4947 | __ bind(&load_smi); |
| 4948 | // Clobbering a temp is faster than re-tagging the |
| 4949 | // input register since we avoid dependencies. |
| 4950 | __ mov(temp_reg, input_reg); |
| 4951 | __ SmiUntag(temp_reg); // Untag smi before converting to float. |
| 4952 | __ push(temp_reg); |
| 4953 | __ fild_s(Operand(esp, 0)); |
| 4954 | __ add(esp, Immediate(kPointerSize)); |
| 4955 | __ bind(&done); |
| 4956 | X87CommitWrite(res_reg); |
| 4957 | } |
| 4958 | |
| 4959 | |
| 4960 | void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr, Label* done) { |
| 4961 | Register input_reg = ToRegister(instr->value()); |
| 4962 | |
| 4963 | // The input was optimistically untagged; revert it. |
| 4964 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4965 | __ lea(input_reg, Operand(input_reg, times_2, kHeapObjectTag)); |
| 4966 | |
| 4967 | if (instr->truncating()) { |
| 4968 | Label no_heap_number, check_bools, check_false; |
| 4969 | |
| 4970 | // Heap number map check. |
| 4971 | __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| 4972 | factory()->heap_number_map()); |
| 4973 | __ j(not_equal, &no_heap_number, Label::kNear); |
| 4974 | __ TruncateHeapNumberToI(input_reg, input_reg); |
| 4975 | __ jmp(done); |
| 4976 | |
| 4977 | __ bind(&no_heap_number); |
| 4978 | // Check for Oddballs. Undefined/False is converted to zero and True to one |
| 4979 | // for truncating conversions. |
| 4980 | __ cmp(input_reg, factory()->undefined_value()); |
| 4981 | __ j(not_equal, &check_bools, Label::kNear); |
| 4982 | __ Move(input_reg, Immediate(0)); |
| 4983 | __ jmp(done); |
| 4984 | |
| 4985 | __ bind(&check_bools); |
| 4986 | __ cmp(input_reg, factory()->true_value()); |
| 4987 | __ j(not_equal, &check_false, Label::kNear); |
| 4988 | __ Move(input_reg, Immediate(1)); |
| 4989 | __ jmp(done); |
| 4990 | |
| 4991 | __ bind(&check_false); |
| 4992 | __ cmp(input_reg, factory()->false_value()); |
| 4993 | DeoptimizeIf(not_equal, instr, |
| 4994 | Deoptimizer::kNotAHeapNumberUndefinedBoolean); |
| 4995 | __ Move(input_reg, Immediate(0)); |
| 4996 | } else { |
| 4997 | // TODO(olivf) Converting a number on the fpu is actually quite slow. We |
| 4998 | // should first try a fast conversion and then bailout to this slow case. |
| 4999 | __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| 5000 | isolate()->factory()->heap_number_map()); |
| 5001 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber); |
| 5002 | |
| 5003 | __ sub(esp, Immediate(kPointerSize)); |
| 5004 | __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| 5005 | |
| 5006 | if (instr->hydrogen()->GetMinusZeroMode() == FAIL_ON_MINUS_ZERO) { |
| 5007 | Label no_precision_lost, not_nan, zero_check; |
| 5008 | __ fld(0); |
| 5009 | |
| 5010 | __ fist_s(MemOperand(esp, 0)); |
| 5011 | __ fild_s(MemOperand(esp, 0)); |
| 5012 | __ FCmp(); |
| 5013 | __ pop(input_reg); |
| 5014 | |
| 5015 | __ j(equal, &no_precision_lost, Label::kNear); |
| 5016 | __ fstp(0); |
| 5017 | DeoptimizeIf(no_condition, instr, Deoptimizer::kLostPrecision); |
| 5018 | __ bind(&no_precision_lost); |
| 5019 | |
| 5020 | __ j(parity_odd, ¬_nan); |
| 5021 | __ fstp(0); |
| 5022 | DeoptimizeIf(no_condition, instr, Deoptimizer::kNaN); |
| 5023 | __ bind(¬_nan); |
| 5024 | |
| 5025 | __ test(input_reg, Operand(input_reg)); |
| 5026 | __ j(zero, &zero_check, Label::kNear); |
| 5027 | __ fstp(0); |
| 5028 | __ jmp(done); |
| 5029 | |
| 5030 | __ bind(&zero_check); |
| 5031 | // To check for minus zero, we load the value again as float, and check |
| 5032 | // if that is still 0. |
| 5033 | __ sub(esp, Immediate(kPointerSize)); |
| 5034 | __ fstp_s(Operand(esp, 0)); |
| 5035 | __ pop(input_reg); |
| 5036 | __ test(input_reg, Operand(input_reg)); |
| 5037 | DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero); |
| 5038 | } else { |
| 5039 | __ fist_s(MemOperand(esp, 0)); |
| 5040 | __ fild_s(MemOperand(esp, 0)); |
| 5041 | __ FCmp(); |
| 5042 | __ pop(input_reg); |
| 5043 | DeoptimizeIf(not_equal, instr, Deoptimizer::kLostPrecision); |
| 5044 | DeoptimizeIf(parity_even, instr, Deoptimizer::kNaN); |
| 5045 | } |
| 5046 | } |
| 5047 | } |
| 5048 | |
| 5049 | |
| 5050 | void LCodeGen::DoTaggedToI(LTaggedToI* instr) { |
| 5051 | class DeferredTaggedToI final : public LDeferredCode { |
| 5052 | public: |
| 5053 | DeferredTaggedToI(LCodeGen* codegen, |
| 5054 | LTaggedToI* instr, |
| 5055 | const X87Stack& x87_stack) |
| 5056 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 5057 | void Generate() override { codegen()->DoDeferredTaggedToI(instr_, done()); } |
| 5058 | LInstruction* instr() override { return instr_; } |
| 5059 | |
| 5060 | private: |
| 5061 | LTaggedToI* instr_; |
| 5062 | }; |
| 5063 | |
| 5064 | LOperand* input = instr->value(); |
| 5065 | DCHECK(input->IsRegister()); |
| 5066 | Register input_reg = ToRegister(input); |
| 5067 | DCHECK(input_reg.is(ToRegister(instr->result()))); |
| 5068 | |
| 5069 | if (instr->hydrogen()->value()->representation().IsSmi()) { |
| 5070 | __ SmiUntag(input_reg); |
| 5071 | } else { |
| 5072 | DeferredTaggedToI* deferred = |
| 5073 | new(zone()) DeferredTaggedToI(this, instr, x87_stack_); |
| 5074 | // Optimistically untag the input. |
| 5075 | // If the input is a HeapObject, SmiUntag will set the carry flag. |
| 5076 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 5077 | __ SmiUntag(input_reg); |
| 5078 | // Branch to deferred code if the input was tagged. |
| 5079 | // The deferred code will take care of restoring the tag. |
| 5080 | __ j(carry, deferred->entry()); |
| 5081 | __ bind(deferred->exit()); |
| 5082 | } |
| 5083 | } |
| 5084 | |
| 5085 | |
| 5086 | void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { |
| 5087 | LOperand* input = instr->value(); |
| 5088 | DCHECK(input->IsRegister()); |
| 5089 | LOperand* temp = instr->temp(); |
| 5090 | DCHECK(temp->IsRegister()); |
| 5091 | LOperand* result = instr->result(); |
| 5092 | DCHECK(result->IsDoubleRegister()); |
| 5093 | |
| 5094 | Register input_reg = ToRegister(input); |
| 5095 | Register temp_reg = ToRegister(temp); |
| 5096 | |
| 5097 | HValue* value = instr->hydrogen()->value(); |
| 5098 | NumberUntagDMode mode = value->representation().IsSmi() |
| 5099 | ? NUMBER_CANDIDATE_IS_SMI : NUMBER_CANDIDATE_IS_ANY_TAGGED; |
| 5100 | |
| 5101 | EmitNumberUntagDNoSSE2(instr, input_reg, temp_reg, ToX87Register(result), |
| 5102 | mode); |
| 5103 | } |
| 5104 | |
| 5105 | |
| 5106 | void LCodeGen::DoDoubleToI(LDoubleToI* instr) { |
| 5107 | LOperand* input = instr->value(); |
| 5108 | DCHECK(input->IsDoubleRegister()); |
| 5109 | LOperand* result = instr->result(); |
| 5110 | DCHECK(result->IsRegister()); |
| 5111 | Register result_reg = ToRegister(result); |
| 5112 | |
| 5113 | if (instr->truncating()) { |
| 5114 | X87Register input_reg = ToX87Register(input); |
| 5115 | X87Fxch(input_reg); |
| 5116 | __ TruncateX87TOSToI(result_reg); |
| 5117 | } else { |
| 5118 | Label lost_precision, is_nan, minus_zero, done; |
| 5119 | X87Register input_reg = ToX87Register(input); |
| 5120 | X87Fxch(input_reg); |
| 5121 | __ X87TOSToI(result_reg, instr->hydrogen()->GetMinusZeroMode(), |
| 5122 | &lost_precision, &is_nan, &minus_zero); |
| 5123 | __ jmp(&done); |
| 5124 | __ bind(&lost_precision); |
| 5125 | DeoptimizeIf(no_condition, instr, Deoptimizer::kLostPrecision); |
| 5126 | __ bind(&is_nan); |
| 5127 | DeoptimizeIf(no_condition, instr, Deoptimizer::kNaN); |
| 5128 | __ bind(&minus_zero); |
| 5129 | DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero); |
| 5130 | __ bind(&done); |
| 5131 | } |
| 5132 | } |
| 5133 | |
| 5134 | |
| 5135 | void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) { |
| 5136 | LOperand* input = instr->value(); |
| 5137 | DCHECK(input->IsDoubleRegister()); |
| 5138 | LOperand* result = instr->result(); |
| 5139 | DCHECK(result->IsRegister()); |
| 5140 | Register result_reg = ToRegister(result); |
| 5141 | |
| 5142 | Label lost_precision, is_nan, minus_zero, done; |
| 5143 | X87Register input_reg = ToX87Register(input); |
| 5144 | X87Fxch(input_reg); |
| 5145 | __ X87TOSToI(result_reg, instr->hydrogen()->GetMinusZeroMode(), |
| 5146 | &lost_precision, &is_nan, &minus_zero); |
| 5147 | __ jmp(&done); |
| 5148 | __ bind(&lost_precision); |
| 5149 | DeoptimizeIf(no_condition, instr, Deoptimizer::kLostPrecision); |
| 5150 | __ bind(&is_nan); |
| 5151 | DeoptimizeIf(no_condition, instr, Deoptimizer::kNaN); |
| 5152 | __ bind(&minus_zero); |
| 5153 | DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero); |
| 5154 | __ bind(&done); |
| 5155 | __ SmiTag(result_reg); |
| 5156 | DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow); |
| 5157 | } |
| 5158 | |
| 5159 | |
| 5160 | void LCodeGen::DoCheckSmi(LCheckSmi* instr) { |
| 5161 | LOperand* input = instr->value(); |
| 5162 | __ test(ToOperand(input), Immediate(kSmiTagMask)); |
| 5163 | DeoptimizeIf(not_zero, instr, Deoptimizer::kNotASmi); |
| 5164 | } |
| 5165 | |
| 5166 | |
| 5167 | void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) { |
| 5168 | if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| 5169 | LOperand* input = instr->value(); |
| 5170 | __ test(ToOperand(input), Immediate(kSmiTagMask)); |
| 5171 | DeoptimizeIf(zero, instr, Deoptimizer::kSmi); |
| 5172 | } |
| 5173 | } |
| 5174 | |
| 5175 | |
| 5176 | void LCodeGen::DoCheckArrayBufferNotNeutered( |
| 5177 | LCheckArrayBufferNotNeutered* instr) { |
| 5178 | Register view = ToRegister(instr->view()); |
| 5179 | Register scratch = ToRegister(instr->scratch()); |
| 5180 | |
| 5181 | __ mov(scratch, FieldOperand(view, JSArrayBufferView::kBufferOffset)); |
| 5182 | __ test_b(FieldOperand(scratch, JSArrayBuffer::kBitFieldOffset), |
| 5183 | 1 << JSArrayBuffer::WasNeutered::kShift); |
| 5184 | DeoptimizeIf(not_zero, instr, Deoptimizer::kOutOfBounds); |
| 5185 | } |
| 5186 | |
| 5187 | |
| 5188 | void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) { |
| 5189 | Register input = ToRegister(instr->value()); |
| 5190 | Register temp = ToRegister(instr->temp()); |
| 5191 | |
| 5192 | __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| 5193 | |
| 5194 | if (instr->hydrogen()->is_interval_check()) { |
| 5195 | InstanceType first; |
| 5196 | InstanceType last; |
| 5197 | instr->hydrogen()->GetCheckInterval(&first, &last); |
| 5198 | |
| 5199 | __ cmpb(FieldOperand(temp, Map::kInstanceTypeOffset), |
| 5200 | static_cast<int8_t>(first)); |
| 5201 | |
| 5202 | // If there is only one type in the interval check for equality. |
| 5203 | if (first == last) { |
| 5204 | DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongInstanceType); |
| 5205 | } else { |
| 5206 | DeoptimizeIf(below, instr, Deoptimizer::kWrongInstanceType); |
| 5207 | // Omit check for the last type. |
| 5208 | if (last != LAST_TYPE) { |
| 5209 | __ cmpb(FieldOperand(temp, Map::kInstanceTypeOffset), |
| 5210 | static_cast<int8_t>(last)); |
| 5211 | DeoptimizeIf(above, instr, Deoptimizer::kWrongInstanceType); |
| 5212 | } |
| 5213 | } |
| 5214 | } else { |
| 5215 | uint8_t mask; |
| 5216 | uint8_t tag; |
| 5217 | instr->hydrogen()->GetCheckMaskAndTag(&mask, &tag); |
| 5218 | |
| 5219 | if (base::bits::IsPowerOfTwo32(mask)) { |
| 5220 | DCHECK(tag == 0 || base::bits::IsPowerOfTwo32(tag)); |
| 5221 | __ test_b(FieldOperand(temp, Map::kInstanceTypeOffset), mask); |
| 5222 | DeoptimizeIf(tag == 0 ? not_zero : zero, instr, |
| 5223 | Deoptimizer::kWrongInstanceType); |
| 5224 | } else { |
| 5225 | __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| 5226 | __ and_(temp, mask); |
| 5227 | __ cmp(temp, tag); |
| 5228 | DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongInstanceType); |
| 5229 | } |
| 5230 | } |
| 5231 | } |
| 5232 | |
| 5233 | |
| 5234 | void LCodeGen::DoCheckValue(LCheckValue* instr) { |
| 5235 | Handle<HeapObject> object = instr->hydrogen()->object().handle(); |
| 5236 | if (instr->hydrogen()->object_in_new_space()) { |
| 5237 | Register reg = ToRegister(instr->value()); |
| 5238 | Handle<Cell> cell = isolate()->factory()->NewCell(object); |
| 5239 | __ cmp(reg, Operand::ForCell(cell)); |
| 5240 | } else { |
| 5241 | Operand operand = ToOperand(instr->value()); |
| 5242 | __ cmp(operand, object); |
| 5243 | } |
| 5244 | DeoptimizeIf(not_equal, instr, Deoptimizer::kValueMismatch); |
| 5245 | } |
| 5246 | |
| 5247 | |
| 5248 | void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) { |
| 5249 | { |
| 5250 | PushSafepointRegistersScope scope(this); |
| 5251 | __ push(object); |
| 5252 | __ xor_(esi, esi); |
| 5253 | __ CallRuntimeSaveDoubles(Runtime::kTryMigrateInstance); |
| 5254 | RecordSafepointWithRegisters( |
| 5255 | instr->pointer_map(), 1, Safepoint::kNoLazyDeopt); |
| 5256 | |
| 5257 | __ test(eax, Immediate(kSmiTagMask)); |
| 5258 | } |
| 5259 | DeoptimizeIf(zero, instr, Deoptimizer::kInstanceMigrationFailed); |
| 5260 | } |
| 5261 | |
| 5262 | |
| 5263 | void LCodeGen::DoCheckMaps(LCheckMaps* instr) { |
| 5264 | class DeferredCheckMaps final : public LDeferredCode { |
| 5265 | public: |
| 5266 | DeferredCheckMaps(LCodeGen* codegen, |
| 5267 | LCheckMaps* instr, |
| 5268 | Register object, |
| 5269 | const X87Stack& x87_stack) |
| 5270 | : LDeferredCode(codegen, x87_stack), instr_(instr), object_(object) { |
| 5271 | SetExit(check_maps()); |
| 5272 | } |
| 5273 | void Generate() override { |
| 5274 | codegen()->DoDeferredInstanceMigration(instr_, object_); |
| 5275 | } |
| 5276 | Label* check_maps() { return &check_maps_; } |
| 5277 | LInstruction* instr() override { return instr_; } |
| 5278 | |
| 5279 | private: |
| 5280 | LCheckMaps* instr_; |
| 5281 | Label check_maps_; |
| 5282 | Register object_; |
| 5283 | }; |
| 5284 | |
| 5285 | if (instr->hydrogen()->IsStabilityCheck()) { |
| 5286 | const UniqueSet<Map>* maps = instr->hydrogen()->maps(); |
| 5287 | for (int i = 0; i < maps->size(); ++i) { |
| 5288 | AddStabilityDependency(maps->at(i).handle()); |
| 5289 | } |
| 5290 | return; |
| 5291 | } |
| 5292 | |
| 5293 | LOperand* input = instr->value(); |
| 5294 | DCHECK(input->IsRegister()); |
| 5295 | Register reg = ToRegister(input); |
| 5296 | |
| 5297 | DeferredCheckMaps* deferred = NULL; |
| 5298 | if (instr->hydrogen()->HasMigrationTarget()) { |
| 5299 | deferred = new(zone()) DeferredCheckMaps(this, instr, reg, x87_stack_); |
| 5300 | __ bind(deferred->check_maps()); |
| 5301 | } |
| 5302 | |
| 5303 | const UniqueSet<Map>* maps = instr->hydrogen()->maps(); |
| 5304 | Label success; |
| 5305 | for (int i = 0; i < maps->size() - 1; i++) { |
| 5306 | Handle<Map> map = maps->at(i).handle(); |
| 5307 | __ CompareMap(reg, map); |
| 5308 | __ j(equal, &success, Label::kNear); |
| 5309 | } |
| 5310 | |
| 5311 | Handle<Map> map = maps->at(maps->size() - 1).handle(); |
| 5312 | __ CompareMap(reg, map); |
| 5313 | if (instr->hydrogen()->HasMigrationTarget()) { |
| 5314 | __ j(not_equal, deferred->entry()); |
| 5315 | } else { |
| 5316 | DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongMap); |
| 5317 | } |
| 5318 | |
| 5319 | __ bind(&success); |
| 5320 | } |
| 5321 | |
| 5322 | |
| 5323 | void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) { |
| 5324 | X87Register value_reg = ToX87Register(instr->unclamped()); |
| 5325 | Register result_reg = ToRegister(instr->result()); |
| 5326 | X87Fxch(value_reg); |
| 5327 | __ ClampTOSToUint8(result_reg); |
| 5328 | } |
| 5329 | |
| 5330 | |
| 5331 | void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) { |
| 5332 | DCHECK(instr->unclamped()->Equals(instr->result())); |
| 5333 | Register value_reg = ToRegister(instr->result()); |
| 5334 | __ ClampUint8(value_reg); |
| 5335 | } |
| 5336 | |
| 5337 | |
| 5338 | void LCodeGen::DoClampTToUint8NoSSE2(LClampTToUint8NoSSE2* instr) { |
| 5339 | Register input_reg = ToRegister(instr->unclamped()); |
| 5340 | Register result_reg = ToRegister(instr->result()); |
| 5341 | Register scratch = ToRegister(instr->scratch()); |
| 5342 | Register scratch2 = ToRegister(instr->scratch2()); |
| 5343 | Register scratch3 = ToRegister(instr->scratch3()); |
| 5344 | Label is_smi, done, heap_number, valid_exponent, |
| 5345 | largest_value, zero_result, maybe_nan_or_infinity; |
| 5346 | |
| 5347 | __ JumpIfSmi(input_reg, &is_smi); |
| 5348 | |
| 5349 | // Check for heap number |
| 5350 | __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| 5351 | factory()->heap_number_map()); |
| 5352 | __ j(equal, &heap_number, Label::kNear); |
| 5353 | |
| 5354 | // Check for undefined. Undefined is converted to zero for clamping |
| 5355 | // conversions. |
| 5356 | __ cmp(input_reg, factory()->undefined_value()); |
| 5357 | DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumberUndefined); |
| 5358 | __ jmp(&zero_result, Label::kNear); |
| 5359 | |
| 5360 | // Heap number |
| 5361 | __ bind(&heap_number); |
| 5362 | |
| 5363 | // Surprisingly, all of the hand-crafted bit-manipulations below are much |
| 5364 | // faster than the x86 FPU built-in instruction, especially since "banker's |
| 5365 | // rounding" would be additionally very expensive |
| 5366 | |
| 5367 | // Get exponent word. |
| 5368 | __ mov(scratch, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| 5369 | __ mov(scratch3, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| 5370 | |
| 5371 | // Test for negative values --> clamp to zero |
| 5372 | __ test(scratch, scratch); |
| 5373 | __ j(negative, &zero_result, Label::kNear); |
| 5374 | |
| 5375 | // Get exponent alone in scratch2. |
| 5376 | __ mov(scratch2, scratch); |
| 5377 | __ and_(scratch2, HeapNumber::kExponentMask); |
| 5378 | __ shr(scratch2, HeapNumber::kExponentShift); |
| 5379 | __ j(zero, &zero_result, Label::kNear); |
| 5380 | __ sub(scratch2, Immediate(HeapNumber::kExponentBias - 1)); |
| 5381 | __ j(negative, &zero_result, Label::kNear); |
| 5382 | |
| 5383 | const uint32_t non_int8_exponent = 7; |
| 5384 | __ cmp(scratch2, Immediate(non_int8_exponent + 1)); |
| 5385 | // If the exponent is too big, check for special values. |
| 5386 | __ j(greater, &maybe_nan_or_infinity, Label::kNear); |
| 5387 | |
| 5388 | __ bind(&valid_exponent); |
| 5389 | // Exponent word in scratch, exponent in scratch2. We know that 0 <= exponent |
| 5390 | // < 7. The shift bias is the number of bits to shift the mantissa such that |
| 5391 | // with an exponent of 7 such the that top-most one is in bit 30, allowing |
| 5392 | // detection the rounding overflow of a 255.5 to 256 (bit 31 goes from 0 to |
| 5393 | // 1). |
| 5394 | int shift_bias = (30 - HeapNumber::kExponentShift) - 7 - 1; |
| 5395 | __ lea(result_reg, MemOperand(scratch2, shift_bias)); |
| 5396 | // Here result_reg (ecx) is the shift, scratch is the exponent word. Get the |
| 5397 | // top bits of the mantissa. |
| 5398 | __ and_(scratch, HeapNumber::kMantissaMask); |
| 5399 | // Put back the implicit 1 of the mantissa |
| 5400 | __ or_(scratch, 1 << HeapNumber::kExponentShift); |
| 5401 | // Shift up to round |
| 5402 | __ shl_cl(scratch); |
| 5403 | // Use "banker's rounding" to spec: If fractional part of number is 0.5, then |
| 5404 | // use the bit in the "ones" place and add it to the "halves" place, which has |
| 5405 | // the effect of rounding to even. |
| 5406 | __ mov(scratch2, scratch); |
| 5407 | const uint32_t one_half_bit_shift = 30 - sizeof(uint8_t) * 8; |
| 5408 | const uint32_t one_bit_shift = one_half_bit_shift + 1; |
| 5409 | __ and_(scratch2, Immediate((1 << one_bit_shift) - 1)); |
| 5410 | __ cmp(scratch2, Immediate(1 << one_half_bit_shift)); |
| 5411 | Label no_round; |
| 5412 | __ j(less, &no_round, Label::kNear); |
| 5413 | Label round_up; |
| 5414 | __ mov(scratch2, Immediate(1 << one_half_bit_shift)); |
| 5415 | __ j(greater, &round_up, Label::kNear); |
| 5416 | __ test(scratch3, scratch3); |
| 5417 | __ j(not_zero, &round_up, Label::kNear); |
| 5418 | __ mov(scratch2, scratch); |
| 5419 | __ and_(scratch2, Immediate(1 << one_bit_shift)); |
| 5420 | __ shr(scratch2, 1); |
| 5421 | __ bind(&round_up); |
| 5422 | __ add(scratch, scratch2); |
| 5423 | __ j(overflow, &largest_value, Label::kNear); |
| 5424 | __ bind(&no_round); |
| 5425 | __ shr(scratch, 23); |
| 5426 | __ mov(result_reg, scratch); |
| 5427 | __ jmp(&done, Label::kNear); |
| 5428 | |
| 5429 | __ bind(&maybe_nan_or_infinity); |
| 5430 | // Check for NaN/Infinity, all other values map to 255 |
| 5431 | __ cmp(scratch2, Immediate(HeapNumber::kInfinityOrNanExponent + 1)); |
| 5432 | __ j(not_equal, &largest_value, Label::kNear); |
| 5433 | |
| 5434 | // Check for NaN, which differs from Infinity in that at least one mantissa |
| 5435 | // bit is set. |
| 5436 | __ and_(scratch, HeapNumber::kMantissaMask); |
| 5437 | __ or_(scratch, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| 5438 | __ j(not_zero, &zero_result, Label::kNear); // M!=0 --> NaN |
| 5439 | // Infinity -> Fall through to map to 255. |
| 5440 | |
| 5441 | __ bind(&largest_value); |
| 5442 | __ mov(result_reg, Immediate(255)); |
| 5443 | __ jmp(&done, Label::kNear); |
| 5444 | |
| 5445 | __ bind(&zero_result); |
| 5446 | __ xor_(result_reg, result_reg); |
| 5447 | __ jmp(&done, Label::kNear); |
| 5448 | |
| 5449 | // smi |
| 5450 | __ bind(&is_smi); |
| 5451 | if (!input_reg.is(result_reg)) { |
| 5452 | __ mov(result_reg, input_reg); |
| 5453 | } |
| 5454 | __ SmiUntag(result_reg); |
| 5455 | __ ClampUint8(result_reg); |
| 5456 | __ bind(&done); |
| 5457 | } |
| 5458 | |
| 5459 | |
| 5460 | void LCodeGen::DoDoubleBits(LDoubleBits* instr) { |
| 5461 | X87Register value_reg = ToX87Register(instr->value()); |
| 5462 | Register result_reg = ToRegister(instr->result()); |
| 5463 | X87Fxch(value_reg); |
| 5464 | __ sub(esp, Immediate(kDoubleSize)); |
| 5465 | __ fst_d(Operand(esp, 0)); |
| 5466 | if (instr->hydrogen()->bits() == HDoubleBits::HIGH) { |
| 5467 | __ mov(result_reg, Operand(esp, kPointerSize)); |
| 5468 | } else { |
| 5469 | __ mov(result_reg, Operand(esp, 0)); |
| 5470 | } |
| 5471 | __ add(esp, Immediate(kDoubleSize)); |
| 5472 | } |
| 5473 | |
| 5474 | |
| 5475 | void LCodeGen::DoConstructDouble(LConstructDouble* instr) { |
| 5476 | Register hi_reg = ToRegister(instr->hi()); |
| 5477 | Register lo_reg = ToRegister(instr->lo()); |
| 5478 | X87Register result_reg = ToX87Register(instr->result()); |
| 5479 | // Follow below pattern to write a x87 fp register. |
| 5480 | X87PrepareToWrite(result_reg); |
| 5481 | __ sub(esp, Immediate(kDoubleSize)); |
| 5482 | __ mov(Operand(esp, 0), lo_reg); |
| 5483 | __ mov(Operand(esp, kPointerSize), hi_reg); |
| 5484 | __ fld_d(Operand(esp, 0)); |
| 5485 | __ add(esp, Immediate(kDoubleSize)); |
| 5486 | X87CommitWrite(result_reg); |
| 5487 | } |
| 5488 | |
| 5489 | |
| 5490 | void LCodeGen::DoAllocate(LAllocate* instr) { |
| 5491 | class DeferredAllocate final : public LDeferredCode { |
| 5492 | public: |
| 5493 | DeferredAllocate(LCodeGen* codegen, |
| 5494 | LAllocate* instr, |
| 5495 | const X87Stack& x87_stack) |
| 5496 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 5497 | void Generate() override { codegen()->DoDeferredAllocate(instr_); } |
| 5498 | LInstruction* instr() override { return instr_; } |
| 5499 | |
| 5500 | private: |
| 5501 | LAllocate* instr_; |
| 5502 | }; |
| 5503 | |
| 5504 | DeferredAllocate* deferred = |
| 5505 | new(zone()) DeferredAllocate(this, instr, x87_stack_); |
| 5506 | |
| 5507 | Register result = ToRegister(instr->result()); |
| 5508 | Register temp = ToRegister(instr->temp()); |
| 5509 | |
| 5510 | // Allocate memory for the object. |
| 5511 | AllocationFlags flags = TAG_OBJECT; |
| 5512 | if (instr->hydrogen()->MustAllocateDoubleAligned()) { |
| 5513 | flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT); |
| 5514 | } |
| 5515 | if (instr->hydrogen()->IsOldSpaceAllocation()) { |
| 5516 | DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| 5517 | flags = static_cast<AllocationFlags>(flags | PRETENURE); |
| 5518 | } |
| 5519 | |
| 5520 | if (instr->size()->IsConstantOperand()) { |
| 5521 | int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| 5522 | CHECK(size <= Page::kMaxRegularHeapObjectSize); |
| 5523 | __ Allocate(size, result, temp, no_reg, deferred->entry(), flags); |
| 5524 | } else { |
| 5525 | Register size = ToRegister(instr->size()); |
| 5526 | __ Allocate(size, result, temp, no_reg, deferred->entry(), flags); |
| 5527 | } |
| 5528 | |
| 5529 | __ bind(deferred->exit()); |
| 5530 | |
| 5531 | if (instr->hydrogen()->MustPrefillWithFiller()) { |
| 5532 | if (instr->size()->IsConstantOperand()) { |
| 5533 | int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| 5534 | __ mov(temp, (size / kPointerSize) - 1); |
| 5535 | } else { |
| 5536 | temp = ToRegister(instr->size()); |
| 5537 | __ shr(temp, kPointerSizeLog2); |
| 5538 | __ dec(temp); |
| 5539 | } |
| 5540 | Label loop; |
| 5541 | __ bind(&loop); |
| 5542 | __ mov(FieldOperand(result, temp, times_pointer_size, 0), |
| 5543 | isolate()->factory()->one_pointer_filler_map()); |
| 5544 | __ dec(temp); |
| 5545 | __ j(not_zero, &loop); |
| 5546 | } |
| 5547 | } |
| 5548 | |
| 5549 | |
| 5550 | void LCodeGen::DoDeferredAllocate(LAllocate* instr) { |
| 5551 | Register result = ToRegister(instr->result()); |
| 5552 | |
| 5553 | // TODO(3095996): Get rid of this. For now, we need to make the |
| 5554 | // result register contain a valid pointer because it is already |
| 5555 | // contained in the register pointer map. |
| 5556 | __ Move(result, Immediate(Smi::FromInt(0))); |
| 5557 | |
| 5558 | PushSafepointRegistersScope scope(this); |
| 5559 | if (instr->size()->IsRegister()) { |
| 5560 | Register size = ToRegister(instr->size()); |
| 5561 | DCHECK(!size.is(result)); |
| 5562 | __ SmiTag(ToRegister(instr->size())); |
| 5563 | __ push(size); |
| 5564 | } else { |
| 5565 | int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| 5566 | if (size >= 0 && size <= Smi::kMaxValue) { |
| 5567 | __ push(Immediate(Smi::FromInt(size))); |
| 5568 | } else { |
| 5569 | // We should never get here at runtime => abort |
| 5570 | __ int3(); |
| 5571 | return; |
| 5572 | } |
| 5573 | } |
| 5574 | |
| 5575 | int flags = AllocateDoubleAlignFlag::encode( |
| 5576 | instr->hydrogen()->MustAllocateDoubleAligned()); |
| 5577 | if (instr->hydrogen()->IsOldSpaceAllocation()) { |
| 5578 | DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| 5579 | flags = AllocateTargetSpace::update(flags, OLD_SPACE); |
| 5580 | } else { |
| 5581 | flags = AllocateTargetSpace::update(flags, NEW_SPACE); |
| 5582 | } |
| 5583 | __ push(Immediate(Smi::FromInt(flags))); |
| 5584 | |
| 5585 | CallRuntimeFromDeferred( |
| 5586 | Runtime::kAllocateInTargetSpace, 2, instr, instr->context()); |
| 5587 | __ StoreToSafepointRegisterSlot(result, eax); |
| 5588 | } |
| 5589 | |
| 5590 | |
| 5591 | void LCodeGen::DoToFastProperties(LToFastProperties* instr) { |
| 5592 | DCHECK(ToRegister(instr->value()).is(eax)); |
| 5593 | __ push(eax); |
| 5594 | CallRuntime(Runtime::kToFastProperties, 1, instr); |
| 5595 | } |
| 5596 | |
| 5597 | |
| 5598 | void LCodeGen::DoTypeof(LTypeof* instr) { |
| 5599 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 5600 | DCHECK(ToRegister(instr->value()).is(ebx)); |
| 5601 | Label end, do_call; |
| 5602 | Register value_register = ToRegister(instr->value()); |
| 5603 | __ JumpIfNotSmi(value_register, &do_call); |
| 5604 | __ mov(eax, Immediate(isolate()->factory()->number_string())); |
| 5605 | __ jmp(&end); |
| 5606 | __ bind(&do_call); |
| 5607 | TypeofStub stub(isolate()); |
| 5608 | CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| 5609 | __ bind(&end); |
| 5610 | } |
| 5611 | |
| 5612 | |
| 5613 | void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) { |
| 5614 | Register input = ToRegister(instr->value()); |
| 5615 | Condition final_branch_condition = EmitTypeofIs(instr, input); |
| 5616 | if (final_branch_condition != no_condition) { |
| 5617 | EmitBranch(instr, final_branch_condition); |
| 5618 | } |
| 5619 | } |
| 5620 | |
| 5621 | |
| 5622 | Condition LCodeGen::EmitTypeofIs(LTypeofIsAndBranch* instr, Register input) { |
| 5623 | Label* true_label = instr->TrueLabel(chunk_); |
| 5624 | Label* false_label = instr->FalseLabel(chunk_); |
| 5625 | Handle<String> type_name = instr->type_literal(); |
| 5626 | int left_block = instr->TrueDestination(chunk_); |
| 5627 | int right_block = instr->FalseDestination(chunk_); |
| 5628 | int next_block = GetNextEmittedBlock(); |
| 5629 | |
| 5630 | Label::Distance true_distance = left_block == next_block ? Label::kNear |
| 5631 | : Label::kFar; |
| 5632 | Label::Distance false_distance = right_block == next_block ? Label::kNear |
| 5633 | : Label::kFar; |
| 5634 | Condition final_branch_condition = no_condition; |
| 5635 | if (String::Equals(type_name, factory()->number_string())) { |
| 5636 | __ JumpIfSmi(input, true_label, true_distance); |
| 5637 | __ cmp(FieldOperand(input, HeapObject::kMapOffset), |
| 5638 | factory()->heap_number_map()); |
| 5639 | final_branch_condition = equal; |
| 5640 | |
| 5641 | } else if (String::Equals(type_name, factory()->string_string())) { |
| 5642 | __ JumpIfSmi(input, false_label, false_distance); |
| 5643 | __ CmpObjectType(input, FIRST_NONSTRING_TYPE, input); |
| 5644 | final_branch_condition = below; |
| 5645 | |
| 5646 | } else if (String::Equals(type_name, factory()->symbol_string())) { |
| 5647 | __ JumpIfSmi(input, false_label, false_distance); |
| 5648 | __ CmpObjectType(input, SYMBOL_TYPE, input); |
| 5649 | final_branch_condition = equal; |
| 5650 | |
| 5651 | } else if (String::Equals(type_name, factory()->boolean_string())) { |
| 5652 | __ cmp(input, factory()->true_value()); |
| 5653 | __ j(equal, true_label, true_distance); |
| 5654 | __ cmp(input, factory()->false_value()); |
| 5655 | final_branch_condition = equal; |
| 5656 | |
| 5657 | } else if (String::Equals(type_name, factory()->undefined_string())) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 5658 | __ cmp(input, factory()->null_value()); |
| 5659 | __ j(equal, false_label, false_distance); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5660 | __ JumpIfSmi(input, false_label, false_distance); |
| 5661 | // Check for undetectable objects => true. |
| 5662 | __ mov(input, FieldOperand(input, HeapObject::kMapOffset)); |
| 5663 | __ test_b(FieldOperand(input, Map::kBitFieldOffset), |
| 5664 | 1 << Map::kIsUndetectable); |
| 5665 | final_branch_condition = not_zero; |
| 5666 | |
| 5667 | } else if (String::Equals(type_name, factory()->function_string())) { |
| 5668 | __ JumpIfSmi(input, false_label, false_distance); |
| 5669 | // Check for callable and not undetectable objects => true. |
| 5670 | __ mov(input, FieldOperand(input, HeapObject::kMapOffset)); |
| 5671 | __ movzx_b(input, FieldOperand(input, Map::kBitFieldOffset)); |
| 5672 | __ and_(input, (1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)); |
| 5673 | __ cmp(input, 1 << Map::kIsCallable); |
| 5674 | final_branch_condition = equal; |
| 5675 | |
| 5676 | } else if (String::Equals(type_name, factory()->object_string())) { |
| 5677 | __ JumpIfSmi(input, false_label, false_distance); |
| 5678 | __ cmp(input, factory()->null_value()); |
| 5679 | __ j(equal, true_label, true_distance); |
| 5680 | STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| 5681 | __ CmpObjectType(input, FIRST_JS_RECEIVER_TYPE, input); |
| 5682 | __ j(below, false_label, false_distance); |
| 5683 | // Check for callable or undetectable objects => false. |
| 5684 | __ test_b(FieldOperand(input, Map::kBitFieldOffset), |
| 5685 | (1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)); |
| 5686 | final_branch_condition = zero; |
| 5687 | |
| 5688 | // clang-format off |
| 5689 | #define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \ |
| 5690 | } else if (String::Equals(type_name, factory()->type##_string())) { \ |
| 5691 | __ JumpIfSmi(input, false_label, false_distance); \ |
| 5692 | __ cmp(FieldOperand(input, HeapObject::kMapOffset), \ |
| 5693 | factory()->type##_map()); \ |
| 5694 | final_branch_condition = equal; |
| 5695 | SIMD128_TYPES(SIMD128_TYPE) |
| 5696 | #undef SIMD128_TYPE |
| 5697 | // clang-format on |
| 5698 | |
| 5699 | } else { |
| 5700 | __ jmp(false_label, false_distance); |
| 5701 | } |
| 5702 | return final_branch_condition; |
| 5703 | } |
| 5704 | |
| 5705 | |
| 5706 | void LCodeGen::EnsureSpaceForLazyDeopt(int space_needed) { |
| 5707 | if (info()->ShouldEnsureSpaceForLazyDeopt()) { |
| 5708 | // Ensure that we have enough space after the previous lazy-bailout |
| 5709 | // instruction for patching the code here. |
| 5710 | int current_pc = masm()->pc_offset(); |
| 5711 | if (current_pc < last_lazy_deopt_pc_ + space_needed) { |
| 5712 | int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; |
| 5713 | __ Nop(padding_size); |
| 5714 | } |
| 5715 | } |
| 5716 | last_lazy_deopt_pc_ = masm()->pc_offset(); |
| 5717 | } |
| 5718 | |
| 5719 | |
| 5720 | void LCodeGen::DoLazyBailout(LLazyBailout* instr) { |
| 5721 | last_lazy_deopt_pc_ = masm()->pc_offset(); |
| 5722 | DCHECK(instr->HasEnvironment()); |
| 5723 | LEnvironment* env = instr->environment(); |
| 5724 | RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| 5725 | safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| 5726 | } |
| 5727 | |
| 5728 | |
| 5729 | void LCodeGen::DoDeoptimize(LDeoptimize* instr) { |
| 5730 | Deoptimizer::BailoutType type = instr->hydrogen()->type(); |
| 5731 | // TODO(danno): Stubs expect all deopts to be lazy for historical reasons (the |
| 5732 | // needed return address), even though the implementation of LAZY and EAGER is |
| 5733 | // now identical. When LAZY is eventually completely folded into EAGER, remove |
| 5734 | // the special case below. |
| 5735 | if (info()->IsStub() && type == Deoptimizer::EAGER) { |
| 5736 | type = Deoptimizer::LAZY; |
| 5737 | } |
| 5738 | DeoptimizeIf(no_condition, instr, instr->hydrogen()->reason(), type); |
| 5739 | } |
| 5740 | |
| 5741 | |
| 5742 | void LCodeGen::DoDummy(LDummy* instr) { |
| 5743 | // Nothing to see here, move on! |
| 5744 | } |
| 5745 | |
| 5746 | |
| 5747 | void LCodeGen::DoDummyUse(LDummyUse* instr) { |
| 5748 | // Nothing to see here, move on! |
| 5749 | } |
| 5750 | |
| 5751 | |
| 5752 | void LCodeGen::DoDeferredStackCheck(LStackCheck* instr) { |
| 5753 | PushSafepointRegistersScope scope(this); |
| 5754 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 5755 | __ CallRuntimeSaveDoubles(Runtime::kStackGuard); |
| 5756 | RecordSafepointWithLazyDeopt( |
| 5757 | instr, RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| 5758 | DCHECK(instr->HasEnvironment()); |
| 5759 | LEnvironment* env = instr->environment(); |
| 5760 | safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| 5761 | } |
| 5762 | |
| 5763 | |
| 5764 | void LCodeGen::DoStackCheck(LStackCheck* instr) { |
| 5765 | class DeferredStackCheck final : public LDeferredCode { |
| 5766 | public: |
| 5767 | DeferredStackCheck(LCodeGen* codegen, |
| 5768 | LStackCheck* instr, |
| 5769 | const X87Stack& x87_stack) |
| 5770 | : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| 5771 | void Generate() override { codegen()->DoDeferredStackCheck(instr_); } |
| 5772 | LInstruction* instr() override { return instr_; } |
| 5773 | |
| 5774 | private: |
| 5775 | LStackCheck* instr_; |
| 5776 | }; |
| 5777 | |
| 5778 | DCHECK(instr->HasEnvironment()); |
| 5779 | LEnvironment* env = instr->environment(); |
| 5780 | // There is no LLazyBailout instruction for stack-checks. We have to |
| 5781 | // prepare for lazy deoptimization explicitly here. |
| 5782 | if (instr->hydrogen()->is_function_entry()) { |
| 5783 | // Perform stack overflow check. |
| 5784 | Label done; |
| 5785 | ExternalReference stack_limit = |
| 5786 | ExternalReference::address_of_stack_limit(isolate()); |
| 5787 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| 5788 | __ j(above_equal, &done, Label::kNear); |
| 5789 | |
| 5790 | DCHECK(instr->context()->IsRegister()); |
| 5791 | DCHECK(ToRegister(instr->context()).is(esi)); |
| 5792 | CallCode(isolate()->builtins()->StackCheck(), |
| 5793 | RelocInfo::CODE_TARGET, |
| 5794 | instr); |
| 5795 | __ bind(&done); |
| 5796 | } else { |
| 5797 | DCHECK(instr->hydrogen()->is_backwards_branch()); |
| 5798 | // Perform stack overflow check if this goto needs it before jumping. |
| 5799 | DeferredStackCheck* deferred_stack_check = |
| 5800 | new(zone()) DeferredStackCheck(this, instr, x87_stack_); |
| 5801 | ExternalReference stack_limit = |
| 5802 | ExternalReference::address_of_stack_limit(isolate()); |
| 5803 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| 5804 | __ j(below, deferred_stack_check->entry()); |
| 5805 | EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); |
| 5806 | __ bind(instr->done_label()); |
| 5807 | deferred_stack_check->SetExit(instr->done_label()); |
| 5808 | RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| 5809 | // Don't record a deoptimization index for the safepoint here. |
| 5810 | // This will be done explicitly when emitting call and the safepoint in |
| 5811 | // the deferred code. |
| 5812 | } |
| 5813 | } |
| 5814 | |
| 5815 | |
| 5816 | void LCodeGen::DoOsrEntry(LOsrEntry* instr) { |
| 5817 | // This is a pseudo-instruction that ensures that the environment here is |
| 5818 | // properly registered for deoptimization and records the assembler's PC |
| 5819 | // offset. |
| 5820 | LEnvironment* environment = instr->environment(); |
| 5821 | |
| 5822 | // If the environment were already registered, we would have no way of |
| 5823 | // backpatching it with the spill slot operands. |
| 5824 | DCHECK(!environment->HasBeenRegistered()); |
| 5825 | RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); |
| 5826 | |
| 5827 | GenerateOsrPrologue(); |
| 5828 | } |
| 5829 | |
| 5830 | |
| 5831 | void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) { |
| 5832 | DCHECK(ToRegister(instr->context()).is(esi)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5833 | |
| 5834 | Label use_cache, call_runtime; |
| 5835 | __ CheckEnumCache(&call_runtime); |
| 5836 | |
| 5837 | __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| 5838 | __ jmp(&use_cache, Label::kNear); |
| 5839 | |
| 5840 | // Get the set of properties to enumerate. |
| 5841 | __ bind(&call_runtime); |
| 5842 | __ push(eax); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 5843 | CallRuntime(Runtime::kForInEnumerate, instr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5844 | __ bind(&use_cache); |
| 5845 | } |
| 5846 | |
| 5847 | |
| 5848 | void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) { |
| 5849 | Register map = ToRegister(instr->map()); |
| 5850 | Register result = ToRegister(instr->result()); |
| 5851 | Label load_cache, done; |
| 5852 | __ EnumLength(result, map); |
| 5853 | __ cmp(result, Immediate(Smi::FromInt(0))); |
| 5854 | __ j(not_equal, &load_cache, Label::kNear); |
| 5855 | __ mov(result, isolate()->factory()->empty_fixed_array()); |
| 5856 | __ jmp(&done, Label::kNear); |
| 5857 | |
| 5858 | __ bind(&load_cache); |
| 5859 | __ LoadInstanceDescriptors(map, result); |
| 5860 | __ mov(result, |
| 5861 | FieldOperand(result, DescriptorArray::kEnumCacheOffset)); |
| 5862 | __ mov(result, |
| 5863 | FieldOperand(result, FixedArray::SizeFor(instr->idx()))); |
| 5864 | __ bind(&done); |
| 5865 | __ test(result, result); |
| 5866 | DeoptimizeIf(equal, instr, Deoptimizer::kNoCache); |
| 5867 | } |
| 5868 | |
| 5869 | |
| 5870 | void LCodeGen::DoCheckMapValue(LCheckMapValue* instr) { |
| 5871 | Register object = ToRegister(instr->value()); |
| 5872 | __ cmp(ToRegister(instr->map()), |
| 5873 | FieldOperand(object, HeapObject::kMapOffset)); |
| 5874 | DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongMap); |
| 5875 | } |
| 5876 | |
| 5877 | |
| 5878 | void LCodeGen::DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, |
| 5879 | Register object, |
| 5880 | Register index) { |
| 5881 | PushSafepointRegistersScope scope(this); |
| 5882 | __ push(object); |
| 5883 | __ push(index); |
| 5884 | __ xor_(esi, esi); |
| 5885 | __ CallRuntimeSaveDoubles(Runtime::kLoadMutableDouble); |
| 5886 | RecordSafepointWithRegisters( |
| 5887 | instr->pointer_map(), 2, Safepoint::kNoLazyDeopt); |
| 5888 | __ StoreToSafepointRegisterSlot(object, eax); |
| 5889 | } |
| 5890 | |
| 5891 | |
| 5892 | void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) { |
| 5893 | class DeferredLoadMutableDouble final : public LDeferredCode { |
| 5894 | public: |
| 5895 | DeferredLoadMutableDouble(LCodeGen* codegen, |
| 5896 | LLoadFieldByIndex* instr, |
| 5897 | Register object, |
| 5898 | Register index, |
| 5899 | const X87Stack& x87_stack) |
| 5900 | : LDeferredCode(codegen, x87_stack), |
| 5901 | instr_(instr), |
| 5902 | object_(object), |
| 5903 | index_(index) { |
| 5904 | } |
| 5905 | void Generate() override { |
| 5906 | codegen()->DoDeferredLoadMutableDouble(instr_, object_, index_); |
| 5907 | } |
| 5908 | LInstruction* instr() override { return instr_; } |
| 5909 | |
| 5910 | private: |
| 5911 | LLoadFieldByIndex* instr_; |
| 5912 | Register object_; |
| 5913 | Register index_; |
| 5914 | }; |
| 5915 | |
| 5916 | Register object = ToRegister(instr->object()); |
| 5917 | Register index = ToRegister(instr->index()); |
| 5918 | |
| 5919 | DeferredLoadMutableDouble* deferred; |
| 5920 | deferred = new(zone()) DeferredLoadMutableDouble( |
| 5921 | this, instr, object, index, x87_stack_); |
| 5922 | |
| 5923 | Label out_of_object, done; |
| 5924 | __ test(index, Immediate(Smi::FromInt(1))); |
| 5925 | __ j(not_zero, deferred->entry()); |
| 5926 | |
| 5927 | __ sar(index, 1); |
| 5928 | |
| 5929 | __ cmp(index, Immediate(0)); |
| 5930 | __ j(less, &out_of_object, Label::kNear); |
| 5931 | __ mov(object, FieldOperand(object, |
| 5932 | index, |
| 5933 | times_half_pointer_size, |
| 5934 | JSObject::kHeaderSize)); |
| 5935 | __ jmp(&done, Label::kNear); |
| 5936 | |
| 5937 | __ bind(&out_of_object); |
| 5938 | __ mov(object, FieldOperand(object, JSObject::kPropertiesOffset)); |
| 5939 | __ neg(index); |
| 5940 | // Index is now equal to out of object property index plus 1. |
| 5941 | __ mov(object, FieldOperand(object, |
| 5942 | index, |
| 5943 | times_half_pointer_size, |
| 5944 | FixedArray::kHeaderSize - kPointerSize)); |
| 5945 | __ bind(deferred->exit()); |
| 5946 | __ bind(&done); |
| 5947 | } |
| 5948 | |
| 5949 | |
| 5950 | void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) { |
| 5951 | Register context = ToRegister(instr->context()); |
| 5952 | __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context); |
| 5953 | } |
| 5954 | |
| 5955 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5956 | #undef __ |
| 5957 | |
| 5958 | } // namespace internal |
| 5959 | } // namespace v8 |
| 5960 | |
| 5961 | #endif // V8_TARGET_ARCH_X87 |