| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/v8.h" |
| |
| #if V8_TARGET_ARCH_X87 |
| |
| #include "src/base/bits.h" |
| #include "src/code-factory.h" |
| #include "src/code-stubs.h" |
| #include "src/codegen.h" |
| #include "src/deoptimizer.h" |
| #include "src/hydrogen-osr.h" |
| #include "src/ic/ic.h" |
| #include "src/ic/stub-cache.h" |
| #include "src/x87/lithium-codegen-x87.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // When invoking builtins, we need to record the safepoint in the middle of |
| // the invoke instruction sequence generated by the macro assembler. |
| class SafepointGenerator FINAL : public CallWrapper { |
| public: |
| SafepointGenerator(LCodeGen* codegen, |
| LPointerMap* pointers, |
| Safepoint::DeoptMode mode) |
| : codegen_(codegen), |
| pointers_(pointers), |
| deopt_mode_(mode) {} |
| virtual ~SafepointGenerator() {} |
| |
| void BeforeCall(int call_size) const OVERRIDE {} |
| |
| void AfterCall() const OVERRIDE { |
| codegen_->RecordSafepoint(pointers_, deopt_mode_); |
| } |
| |
| private: |
| LCodeGen* codegen_; |
| LPointerMap* pointers_; |
| Safepoint::DeoptMode deopt_mode_; |
| }; |
| |
| |
| #define __ masm()-> |
| |
| bool LCodeGen::GenerateCode() { |
| LPhase phase("Z_Code generation", chunk()); |
| DCHECK(is_unused()); |
| status_ = GENERATING; |
| |
| // Open a frame scope to indicate that there is a frame on the stack. The |
| // MANUAL indicates that the scope shouldn't actually generate code to set up |
| // the frame (that is done in GeneratePrologue). |
| FrameScope frame_scope(masm_, StackFrame::MANUAL); |
| |
| support_aligned_spilled_doubles_ = info()->IsOptimizing(); |
| |
| dynamic_frame_alignment_ = info()->IsOptimizing() && |
| ((chunk()->num_double_slots() > 2 && |
| !chunk()->graph()->is_recursive()) || |
| !info()->osr_ast_id().IsNone()); |
| |
| return GeneratePrologue() && |
| GenerateBody() && |
| GenerateDeferredCode() && |
| GenerateJumpTable() && |
| GenerateSafepointTable(); |
| } |
| |
| |
| void LCodeGen::FinishCode(Handle<Code> code) { |
| DCHECK(is_done()); |
| code->set_stack_slots(GetStackSlotCount()); |
| code->set_safepoint_table_offset(safepoints_.GetCodeOffset()); |
| if (code->is_optimized_code()) RegisterWeakObjectsInOptimizedCode(code); |
| PopulateDeoptimizationData(code); |
| if (!info()->IsStub()) { |
| Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code); |
| } |
| } |
| |
| |
| #ifdef _MSC_VER |
| void LCodeGen::MakeSureStackPagesMapped(int offset) { |
| const int kPageSize = 4 * KB; |
| for (offset -= kPageSize; offset > 0; offset -= kPageSize) { |
| __ mov(Operand(esp, offset), eax); |
| } |
| } |
| #endif |
| |
| |
| bool LCodeGen::GeneratePrologue() { |
| DCHECK(is_generating()); |
| |
| if (info()->IsOptimizing()) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| |
| #ifdef DEBUG |
| if (strlen(FLAG_stop_at) > 0 && |
| info_->function()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) { |
| __ int3(); |
| } |
| #endif |
| |
| // Sloppy mode functions and builtins need to replace the receiver with the |
| // global proxy when called as functions (without an explicit receiver |
| // object). |
| if (info_->this_has_uses() && |
| info_->strict_mode() == SLOPPY && |
| !info_->is_native()) { |
| Label ok; |
| // +1 for return address. |
| int receiver_offset = (scope()->num_parameters() + 1) * kPointerSize; |
| __ mov(ecx, Operand(esp, receiver_offset)); |
| |
| __ cmp(ecx, isolate()->factory()->undefined_value()); |
| __ j(not_equal, &ok, Label::kNear); |
| |
| __ mov(ecx, GlobalObjectOperand()); |
| __ mov(ecx, FieldOperand(ecx, GlobalObject::kGlobalProxyOffset)); |
| |
| __ mov(Operand(esp, receiver_offset), ecx); |
| |
| __ bind(&ok); |
| } |
| |
| if (support_aligned_spilled_doubles_ && dynamic_frame_alignment_) { |
| // Move state of dynamic frame alignment into edx. |
| __ Move(edx, Immediate(kNoAlignmentPadding)); |
| |
| Label do_not_pad, align_loop; |
| STATIC_ASSERT(kDoubleSize == 2 * kPointerSize); |
| // Align esp + 4 to a multiple of 2 * kPointerSize. |
| __ test(esp, Immediate(kPointerSize)); |
| __ j(not_zero, &do_not_pad, Label::kNear); |
| __ push(Immediate(0)); |
| __ mov(ebx, esp); |
| __ mov(edx, Immediate(kAlignmentPaddingPushed)); |
| // Copy arguments, receiver, and return address. |
| __ mov(ecx, Immediate(scope()->num_parameters() + 2)); |
| |
| __ bind(&align_loop); |
| __ mov(eax, Operand(ebx, 1 * kPointerSize)); |
| __ mov(Operand(ebx, 0), eax); |
| __ add(Operand(ebx), Immediate(kPointerSize)); |
| __ dec(ecx); |
| __ j(not_zero, &align_loop, Label::kNear); |
| __ mov(Operand(ebx, 0), Immediate(kAlignmentZapValue)); |
| __ bind(&do_not_pad); |
| } |
| } |
| |
| info()->set_prologue_offset(masm_->pc_offset()); |
| if (NeedsEagerFrame()) { |
| DCHECK(!frame_is_built_); |
| frame_is_built_ = true; |
| if (info()->IsStub()) { |
| __ StubPrologue(); |
| } else { |
| __ Prologue(info()->IsCodePreAgingActive()); |
| } |
| info()->AddNoFrameRange(0, masm_->pc_offset()); |
| } |
| |
| if (info()->IsOptimizing() && |
| dynamic_frame_alignment_ && |
| FLAG_debug_code) { |
| __ test(esp, Immediate(kPointerSize)); |
| __ Assert(zero, kFrameIsExpectedToBeAligned); |
| } |
| |
| // Reserve space for the stack slots needed by the code. |
| int slots = GetStackSlotCount(); |
| DCHECK(slots != 0 || !info()->IsOptimizing()); |
| if (slots > 0) { |
| if (slots == 1) { |
| if (dynamic_frame_alignment_) { |
| __ push(edx); |
| } else { |
| __ push(Immediate(kNoAlignmentPadding)); |
| } |
| } else { |
| if (FLAG_debug_code) { |
| __ sub(Operand(esp), Immediate(slots * kPointerSize)); |
| #ifdef _MSC_VER |
| MakeSureStackPagesMapped(slots * kPointerSize); |
| #endif |
| __ push(eax); |
| __ mov(Operand(eax), Immediate(slots)); |
| Label loop; |
| __ bind(&loop); |
| __ mov(MemOperand(esp, eax, times_4, 0), |
| Immediate(kSlotsZapValue)); |
| __ dec(eax); |
| __ j(not_zero, &loop); |
| __ pop(eax); |
| } else { |
| __ sub(Operand(esp), Immediate(slots * kPointerSize)); |
| #ifdef _MSC_VER |
| MakeSureStackPagesMapped(slots * kPointerSize); |
| #endif |
| } |
| |
| if (support_aligned_spilled_doubles_) { |
| Comment(";;; Store dynamic frame alignment tag for spilled doubles"); |
| // Store dynamic frame alignment state in the first local. |
| int offset = JavaScriptFrameConstants::kDynamicAlignmentStateOffset; |
| if (dynamic_frame_alignment_) { |
| __ mov(Operand(ebp, offset), edx); |
| } else { |
| __ mov(Operand(ebp, offset), Immediate(kNoAlignmentPadding)); |
| } |
| } |
| } |
| } |
| |
| // Possibly allocate a local context. |
| int heap_slots = info_->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| if (heap_slots > 0) { |
| Comment(";;; Allocate local context"); |
| bool need_write_barrier = true; |
| // Argument to NewContext is the function, which is still in edi. |
| if (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| FastNewContextStub stub(isolate(), heap_slots); |
| __ CallStub(&stub); |
| // Result of FastNewContextStub is always in new space. |
| need_write_barrier = false; |
| } else { |
| __ push(edi); |
| __ CallRuntime(Runtime::kNewFunctionContext, 1); |
| } |
| RecordSafepoint(Safepoint::kNoLazyDeopt); |
| // Context is returned in eax. It replaces the context passed to us. |
| // It's saved in the stack and kept live in esi. |
| __ mov(esi, eax); |
| __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), eax); |
| |
| // Copy parameters into context if necessary. |
| int num_parameters = scope()->num_parameters(); |
| for (int i = 0; i < num_parameters; i++) { |
| Variable* var = scope()->parameter(i); |
| if (var->IsContextSlot()) { |
| int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| (num_parameters - 1 - i) * kPointerSize; |
| // Load parameter from stack. |
| __ mov(eax, Operand(ebp, parameter_offset)); |
| // Store it in the context. |
| int context_offset = Context::SlotOffset(var->index()); |
| __ mov(Operand(esi, context_offset), eax); |
| // Update the write barrier. This clobbers eax and ebx. |
| if (need_write_barrier) { |
| __ RecordWriteContextSlot(esi, context_offset, eax, ebx, |
| kDontSaveFPRegs); |
| } else if (FLAG_debug_code) { |
| Label done; |
| __ JumpIfInNewSpace(esi, eax, &done, Label::kNear); |
| __ Abort(kExpectedNewSpaceObject); |
| __ bind(&done); |
| } |
| } |
| } |
| Comment(";;; End allocate local context"); |
| } |
| |
| // Initailize FPU state. |
| __ fninit(); |
| // Trace the call. |
| if (FLAG_trace && info()->IsOptimizing()) { |
| // We have not executed any compiled code yet, so esi still holds the |
| // incoming context. |
| __ CallRuntime(Runtime::kTraceEnter, 0); |
| } |
| return !is_aborted(); |
| } |
| |
| |
| void LCodeGen::GenerateOsrPrologue() { |
| // Generate the OSR entry prologue at the first unknown OSR value, or if there |
| // are none, at the OSR entrypoint instruction. |
| if (osr_pc_offset_ >= 0) return; |
| |
| osr_pc_offset_ = masm()->pc_offset(); |
| |
| // Move state of dynamic frame alignment into edx. |
| __ Move(edx, Immediate(kNoAlignmentPadding)); |
| |
| if (support_aligned_spilled_doubles_ && dynamic_frame_alignment_) { |
| Label do_not_pad, align_loop; |
| // Align ebp + 4 to a multiple of 2 * kPointerSize. |
| __ test(ebp, Immediate(kPointerSize)); |
| __ j(zero, &do_not_pad, Label::kNear); |
| __ push(Immediate(0)); |
| __ mov(ebx, esp); |
| __ mov(edx, Immediate(kAlignmentPaddingPushed)); |
| |
| // Move all parts of the frame over one word. The frame consists of: |
| // unoptimized frame slots, alignment state, context, frame pointer, return |
| // address, receiver, and the arguments. |
| __ mov(ecx, Immediate(scope()->num_parameters() + |
| 5 + graph()->osr()->UnoptimizedFrameSlots())); |
| |
| __ bind(&align_loop); |
| __ mov(eax, Operand(ebx, 1 * kPointerSize)); |
| __ mov(Operand(ebx, 0), eax); |
| __ add(Operand(ebx), Immediate(kPointerSize)); |
| __ dec(ecx); |
| __ j(not_zero, &align_loop, Label::kNear); |
| __ mov(Operand(ebx, 0), Immediate(kAlignmentZapValue)); |
| __ sub(Operand(ebp), Immediate(kPointerSize)); |
| __ bind(&do_not_pad); |
| } |
| |
| // Save the first local, which is overwritten by the alignment state. |
| Operand alignment_loc = MemOperand(ebp, -3 * kPointerSize); |
| __ push(alignment_loc); |
| |
| // Set the dynamic frame alignment state. |
| __ mov(alignment_loc, edx); |
| |
| // Adjust the frame size, subsuming the unoptimized frame into the |
| // optimized frame. |
| int slots = GetStackSlotCount() - graph()->osr()->UnoptimizedFrameSlots(); |
| DCHECK(slots >= 1); |
| __ sub(esp, Immediate((slots - 1) * kPointerSize)); |
| |
| // Initailize FPU state. |
| __ fninit(); |
| } |
| |
| |
| void LCodeGen::GenerateBodyInstructionPre(LInstruction* instr) { |
| if (instr->IsCall()) { |
| EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); |
| } |
| if (!instr->IsLazyBailout() && !instr->IsGap()) { |
| safepoints_.BumpLastLazySafepointIndex(); |
| } |
| FlushX87StackIfNecessary(instr); |
| } |
| |
| |
| void LCodeGen::GenerateBodyInstructionPost(LInstruction* instr) { |
| // When return from function call, FPU should be initialized again. |
| if (instr->IsCall() && instr->ClobbersDoubleRegisters(isolate())) { |
| bool double_result = instr->HasDoubleRegisterResult(); |
| if (double_result) { |
| __ lea(esp, Operand(esp, -kDoubleSize)); |
| __ fstp_d(Operand(esp, 0)); |
| } |
| __ fninit(); |
| if (double_result) { |
| __ fld_d(Operand(esp, 0)); |
| __ lea(esp, Operand(esp, kDoubleSize)); |
| } |
| } |
| if (instr->IsGoto()) { |
| x87_stack_.LeavingBlock(current_block_, LGoto::cast(instr), this); |
| } else if (FLAG_debug_code && FLAG_enable_slow_asserts && |
| !instr->IsGap() && !instr->IsReturn()) { |
| if (instr->ClobbersDoubleRegisters(isolate())) { |
| if (instr->HasDoubleRegisterResult()) { |
| DCHECK_EQ(1, x87_stack_.depth()); |
| } else { |
| DCHECK_EQ(0, x87_stack_.depth()); |
| } |
| } |
| __ VerifyX87StackDepth(x87_stack_.depth()); |
| } |
| } |
| |
| |
| bool LCodeGen::GenerateJumpTable() { |
| Label needs_frame; |
| if (jump_table_.length() > 0) { |
| Comment(";;; -------------------- Jump table --------------------"); |
| } |
| for (int i = 0; i < jump_table_.length(); i++) { |
| Deoptimizer::JumpTableEntry* table_entry = &jump_table_[i]; |
| __ bind(&table_entry->label); |
| Address entry = table_entry->address; |
| DeoptComment(table_entry->reason); |
| if (table_entry->needs_frame) { |
| DCHECK(!info()->saves_caller_doubles()); |
| __ push(Immediate(ExternalReference::ForDeoptEntry(entry))); |
| if (needs_frame.is_bound()) { |
| __ jmp(&needs_frame); |
| } else { |
| __ bind(&needs_frame); |
| __ push(MemOperand(ebp, StandardFrameConstants::kContextOffset)); |
| // This variant of deopt can only be used with stubs. Since we don't |
| // have a function pointer to install in the stack frame that we're |
| // building, install a special marker there instead. |
| DCHECK(info()->IsStub()); |
| __ push(Immediate(Smi::FromInt(StackFrame::STUB))); |
| // Push a PC inside the function so that the deopt code can find where |
| // the deopt comes from. It doesn't have to be the precise return |
| // address of a "calling" LAZY deopt, it only has to be somewhere |
| // inside the code body. |
| Label push_approx_pc; |
| __ call(&push_approx_pc); |
| __ bind(&push_approx_pc); |
| // Push the continuation which was stashed were the ebp should |
| // be. Replace it with the saved ebp. |
| __ push(MemOperand(esp, 3 * kPointerSize)); |
| __ mov(MemOperand(esp, 4 * kPointerSize), ebp); |
| __ lea(ebp, MemOperand(esp, 4 * kPointerSize)); |
| __ ret(0); // Call the continuation without clobbering registers. |
| } |
| } else { |
| __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| } |
| } |
| return !is_aborted(); |
| } |
| |
| |
| bool LCodeGen::GenerateDeferredCode() { |
| DCHECK(is_generating()); |
| if (deferred_.length() > 0) { |
| for (int i = 0; !is_aborted() && i < deferred_.length(); i++) { |
| LDeferredCode* code = deferred_[i]; |
| X87Stack copy(code->x87_stack()); |
| x87_stack_ = copy; |
| |
| HValue* value = |
| instructions_->at(code->instruction_index())->hydrogen_value(); |
| RecordAndWritePosition( |
| chunk()->graph()->SourcePositionToScriptPosition(value->position())); |
| |
| Comment(";;; <@%d,#%d> " |
| "-------------------- Deferred %s --------------------", |
| code->instruction_index(), |
| code->instr()->hydrogen_value()->id(), |
| code->instr()->Mnemonic()); |
| __ bind(code->entry()); |
| if (NeedsDeferredFrame()) { |
| Comment(";;; Build frame"); |
| DCHECK(!frame_is_built_); |
| DCHECK(info()->IsStub()); |
| frame_is_built_ = true; |
| // Build the frame in such a way that esi isn't trashed. |
| __ push(ebp); // Caller's frame pointer. |
| __ push(Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ push(Immediate(Smi::FromInt(StackFrame::STUB))); |
| __ lea(ebp, Operand(esp, 2 * kPointerSize)); |
| Comment(";;; Deferred code"); |
| } |
| code->Generate(); |
| if (NeedsDeferredFrame()) { |
| __ bind(code->done()); |
| Comment(";;; Destroy frame"); |
| DCHECK(frame_is_built_); |
| frame_is_built_ = false; |
| __ mov(esp, ebp); |
| __ pop(ebp); |
| } |
| __ jmp(code->exit()); |
| } |
| } |
| |
| // Deferred code is the last part of the instruction sequence. Mark |
| // the generated code as done unless we bailed out. |
| if (!is_aborted()) status_ = DONE; |
| return !is_aborted(); |
| } |
| |
| |
| bool LCodeGen::GenerateSafepointTable() { |
| DCHECK(is_done()); |
| if (!info()->IsStub()) { |
| // For lazy deoptimization we need space to patch a call after every call. |
| // Ensure there is always space for such patching, even if the code ends |
| // in a call. |
| int target_offset = masm()->pc_offset() + Deoptimizer::patch_size(); |
| while (masm()->pc_offset() < target_offset) { |
| masm()->nop(); |
| } |
| } |
| safepoints_.Emit(masm(), GetStackSlotCount()); |
| return !is_aborted(); |
| } |
| |
| |
| Register LCodeGen::ToRegister(int index) const { |
| return Register::FromAllocationIndex(index); |
| } |
| |
| |
| X87Register LCodeGen::ToX87Register(int index) const { |
| return X87Register::FromAllocationIndex(index); |
| } |
| |
| |
| void LCodeGen::X87LoadForUsage(X87Register reg) { |
| DCHECK(x87_stack_.Contains(reg)); |
| x87_stack_.Fxch(reg); |
| x87_stack_.pop(); |
| } |
| |
| |
| void LCodeGen::X87LoadForUsage(X87Register reg1, X87Register reg2) { |
| DCHECK(x87_stack_.Contains(reg1)); |
| DCHECK(x87_stack_.Contains(reg2)); |
| if (reg1.is(reg2) && x87_stack_.depth() == 1) { |
| __ fld(x87_stack_.st(reg1)); |
| x87_stack_.push(reg1); |
| x87_stack_.pop(); |
| x87_stack_.pop(); |
| } else { |
| x87_stack_.Fxch(reg1, 1); |
| x87_stack_.Fxch(reg2); |
| x87_stack_.pop(); |
| x87_stack_.pop(); |
| } |
| } |
| |
| |
| int LCodeGen::X87Stack::GetLayout() { |
| int layout = stack_depth_; |
| for (int i = 0; i < stack_depth_; i++) { |
| layout |= (stack_[stack_depth_ - 1 - i].code() << ((i + 1) * 3)); |
| } |
| |
| return layout; |
| } |
| |
| |
| void LCodeGen::X87Stack::Fxch(X87Register reg, int other_slot) { |
| DCHECK(is_mutable_); |
| DCHECK(Contains(reg) && stack_depth_ > other_slot); |
| int i = ArrayIndex(reg); |
| int st = st2idx(i); |
| if (st != other_slot) { |
| int other_i = st2idx(other_slot); |
| X87Register other = stack_[other_i]; |
| stack_[other_i] = reg; |
| stack_[i] = other; |
| if (st == 0) { |
| __ fxch(other_slot); |
| } else if (other_slot == 0) { |
| __ fxch(st); |
| } else { |
| __ fxch(st); |
| __ fxch(other_slot); |
| __ fxch(st); |
| } |
| } |
| } |
| |
| |
| int LCodeGen::X87Stack::st2idx(int pos) { |
| return stack_depth_ - pos - 1; |
| } |
| |
| |
| int LCodeGen::X87Stack::ArrayIndex(X87Register reg) { |
| for (int i = 0; i < stack_depth_; i++) { |
| if (stack_[i].is(reg)) return i; |
| } |
| UNREACHABLE(); |
| return -1; |
| } |
| |
| |
| bool LCodeGen::X87Stack::Contains(X87Register reg) { |
| for (int i = 0; i < stack_depth_; i++) { |
| if (stack_[i].is(reg)) return true; |
| } |
| return false; |
| } |
| |
| |
| void LCodeGen::X87Stack::Free(X87Register reg) { |
| DCHECK(is_mutable_); |
| DCHECK(Contains(reg)); |
| int i = ArrayIndex(reg); |
| int st = st2idx(i); |
| if (st > 0) { |
| // keep track of how fstp(i) changes the order of elements |
| int tos_i = st2idx(0); |
| stack_[i] = stack_[tos_i]; |
| } |
| pop(); |
| __ fstp(st); |
| } |
| |
| |
| void LCodeGen::X87Mov(X87Register dst, Operand src, X87OperandType opts) { |
| if (x87_stack_.Contains(dst)) { |
| x87_stack_.Fxch(dst); |
| __ fstp(0); |
| } else { |
| x87_stack_.push(dst); |
| } |
| X87Fld(src, opts); |
| } |
| |
| |
| void LCodeGen::X87Mov(X87Register dst, X87Register src, X87OperandType opts) { |
| if (x87_stack_.Contains(dst)) { |
| x87_stack_.Fxch(dst); |
| __ fstp(0); |
| x87_stack_.pop(); |
| // Push ST(i) onto the FPU register stack |
| __ fld(x87_stack_.st(src)); |
| x87_stack_.push(dst); |
| } else { |
| // Push ST(i) onto the FPU register stack |
| __ fld(x87_stack_.st(src)); |
| x87_stack_.push(dst); |
| } |
| } |
| |
| |
| void LCodeGen::X87Fld(Operand src, X87OperandType opts) { |
| DCHECK(!src.is_reg_only()); |
| switch (opts) { |
| case kX87DoubleOperand: |
| __ fld_d(src); |
| break; |
| case kX87FloatOperand: |
| __ fld_s(src); |
| break; |
| case kX87IntOperand: |
| __ fild_s(src); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::X87Mov(Operand dst, X87Register src, X87OperandType opts) { |
| DCHECK(!dst.is_reg_only()); |
| x87_stack_.Fxch(src); |
| switch (opts) { |
| case kX87DoubleOperand: |
| __ fst_d(dst); |
| break; |
| case kX87FloatOperand: |
| __ fst_s(dst); |
| break; |
| case kX87IntOperand: |
| __ fist_s(dst); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::X87Stack::PrepareToWrite(X87Register reg) { |
| DCHECK(is_mutable_); |
| if (Contains(reg)) { |
| Free(reg); |
| } |
| // Mark this register as the next register to write to |
| stack_[stack_depth_] = reg; |
| } |
| |
| |
| void LCodeGen::X87Stack::CommitWrite(X87Register reg) { |
| DCHECK(is_mutable_); |
| // Assert the reg is prepared to write, but not on the virtual stack yet |
| DCHECK(!Contains(reg) && stack_[stack_depth_].is(reg) && |
| stack_depth_ < X87Register::kMaxNumAllocatableRegisters); |
| stack_depth_++; |
| } |
| |
| |
| void LCodeGen::X87PrepareBinaryOp( |
| X87Register left, X87Register right, X87Register result) { |
| // You need to use DefineSameAsFirst for x87 instructions |
| DCHECK(result.is(left)); |
| x87_stack_.Fxch(right, 1); |
| x87_stack_.Fxch(left); |
| } |
| |
| |
| void LCodeGen::X87Stack::FlushIfNecessary(LInstruction* instr, LCodeGen* cgen) { |
| if (stack_depth_ > 0 && instr->ClobbersDoubleRegisters(isolate())) { |
| bool double_inputs = instr->HasDoubleRegisterInput(); |
| |
| // Flush stack from tos down, since FreeX87() will mess with tos |
| for (int i = stack_depth_-1; i >= 0; i--) { |
| X87Register reg = stack_[i]; |
| // Skip registers which contain the inputs for the next instruction |
| // when flushing the stack |
| if (double_inputs && instr->IsDoubleInput(reg, cgen)) { |
| continue; |
| } |
| Free(reg); |
| if (i < stack_depth_-1) i++; |
| } |
| } |
| if (instr->IsReturn()) { |
| while (stack_depth_ > 0) { |
| __ fstp(0); |
| stack_depth_--; |
| } |
| if (FLAG_debug_code && FLAG_enable_slow_asserts) __ VerifyX87StackDepth(0); |
| } |
| } |
| |
| |
| void LCodeGen::X87Stack::LeavingBlock(int current_block_id, LGoto* goto_instr, |
| LCodeGen* cgen) { |
| // For going to a joined block, an explicit LClobberDoubles is inserted before |
| // LGoto. Because all used x87 registers are spilled to stack slots. The |
| // ResolvePhis phase of register allocator could guarantee the two input's x87 |
| // stacks have the same layout. So don't check stack_depth_ <= 1 here. |
| int goto_block_id = goto_instr->block_id(); |
| if (current_block_id + 1 != goto_block_id) { |
| // If we have a value on the x87 stack on leaving a block, it must be a |
| // phi input. If the next block we compile is not the join block, we have |
| // to discard the stack state. |
| // Before discarding the stack state, we need to save it if the "goto block" |
| // has unreachable last predecessor when FLAG_unreachable_code_elimination. |
| if (FLAG_unreachable_code_elimination) { |
| int length = goto_instr->block()->predecessors()->length(); |
| bool has_unreachable_last_predecessor = false; |
| for (int i = 0; i < length; i++) { |
| HBasicBlock* block = goto_instr->block()->predecessors()->at(i); |
| if (block->IsUnreachable() && |
| (block->block_id() + 1) == goto_block_id) { |
| has_unreachable_last_predecessor = true; |
| } |
| } |
| if (has_unreachable_last_predecessor) { |
| if (cgen->x87_stack_map_.find(goto_block_id) == |
| cgen->x87_stack_map_.end()) { |
| X87Stack* stack = new (cgen->zone()) X87Stack(*this); |
| cgen->x87_stack_map_.insert(std::make_pair(goto_block_id, stack)); |
| } |
| } |
| } |
| |
| // Discard the stack state. |
| stack_depth_ = 0; |
| } |
| } |
| |
| |
| void LCodeGen::EmitFlushX87ForDeopt() { |
| // The deoptimizer does not support X87 Registers. But as long as we |
| // deopt from a stub its not a problem, since we will re-materialize the |
| // original stub inputs, which can't be double registers. |
| // DCHECK(info()->IsStub()); |
| if (FLAG_debug_code && FLAG_enable_slow_asserts) { |
| __ pushfd(); |
| __ VerifyX87StackDepth(x87_stack_.depth()); |
| __ popfd(); |
| } |
| |
| // Flush X87 stack in the deoptimizer entry. |
| } |
| |
| |
| Register LCodeGen::ToRegister(LOperand* op) const { |
| DCHECK(op->IsRegister()); |
| return ToRegister(op->index()); |
| } |
| |
| |
| X87Register LCodeGen::ToX87Register(LOperand* op) const { |
| DCHECK(op->IsDoubleRegister()); |
| return ToX87Register(op->index()); |
| } |
| |
| |
| int32_t LCodeGen::ToInteger32(LConstantOperand* op) const { |
| return ToRepresentation(op, Representation::Integer32()); |
| } |
| |
| |
| int32_t LCodeGen::ToRepresentation(LConstantOperand* op, |
| const Representation& r) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| int32_t value = constant->Integer32Value(); |
| if (r.IsInteger32()) return value; |
| DCHECK(r.IsSmiOrTagged()); |
| return reinterpret_cast<int32_t>(Smi::FromInt(value)); |
| } |
| |
| |
| Handle<Object> LCodeGen::ToHandle(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| DCHECK(chunk_->LookupLiteralRepresentation(op).IsSmiOrTagged()); |
| return constant->handle(isolate()); |
| } |
| |
| |
| double LCodeGen::ToDouble(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| DCHECK(constant->HasDoubleValue()); |
| return constant->DoubleValue(); |
| } |
| |
| |
| ExternalReference LCodeGen::ToExternalReference(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| DCHECK(constant->HasExternalReferenceValue()); |
| return constant->ExternalReferenceValue(); |
| } |
| |
| |
| bool LCodeGen::IsInteger32(LConstantOperand* op) const { |
| return chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32(); |
| } |
| |
| |
| bool LCodeGen::IsSmi(LConstantOperand* op) const { |
| return chunk_->LookupLiteralRepresentation(op).IsSmi(); |
| } |
| |
| |
| static int ArgumentsOffsetWithoutFrame(int index) { |
| DCHECK(index < 0); |
| return -(index + 1) * kPointerSize + kPCOnStackSize; |
| } |
| |
| |
| Operand LCodeGen::ToOperand(LOperand* op) const { |
| if (op->IsRegister()) return Operand(ToRegister(op)); |
| DCHECK(!op->IsDoubleRegister()); |
| DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot()); |
| if (NeedsEagerFrame()) { |
| return Operand(ebp, StackSlotOffset(op->index())); |
| } else { |
| // Retrieve parameter without eager stack-frame relative to the |
| // stack-pointer. |
| return Operand(esp, ArgumentsOffsetWithoutFrame(op->index())); |
| } |
| } |
| |
| |
| Operand LCodeGen::HighOperand(LOperand* op) { |
| DCHECK(op->IsDoubleStackSlot()); |
| if (NeedsEagerFrame()) { |
| return Operand(ebp, StackSlotOffset(op->index()) + kPointerSize); |
| } else { |
| // Retrieve parameter without eager stack-frame relative to the |
| // stack-pointer. |
| return Operand( |
| esp, ArgumentsOffsetWithoutFrame(op->index()) + kPointerSize); |
| } |
| } |
| |
| |
| void LCodeGen::WriteTranslation(LEnvironment* environment, |
| Translation* translation) { |
| if (environment == NULL) return; |
| |
| // The translation includes one command per value in the environment. |
| int translation_size = environment->translation_size(); |
| // The output frame height does not include the parameters. |
| int height = translation_size - environment->parameter_count(); |
| |
| WriteTranslation(environment->outer(), translation); |
| bool has_closure_id = !info()->closure().is_null() && |
| !info()->closure().is_identical_to(environment->closure()); |
| int closure_id = has_closure_id |
| ? DefineDeoptimizationLiteral(environment->closure()) |
| : Translation::kSelfLiteralId; |
| switch (environment->frame_type()) { |
| case JS_FUNCTION: |
| translation->BeginJSFrame(environment->ast_id(), closure_id, height); |
| break; |
| case JS_CONSTRUCT: |
| translation->BeginConstructStubFrame(closure_id, translation_size); |
| break; |
| case JS_GETTER: |
| DCHECK(translation_size == 1); |
| DCHECK(height == 0); |
| translation->BeginGetterStubFrame(closure_id); |
| break; |
| case JS_SETTER: |
| DCHECK(translation_size == 2); |
| DCHECK(height == 0); |
| translation->BeginSetterStubFrame(closure_id); |
| break; |
| case ARGUMENTS_ADAPTOR: |
| translation->BeginArgumentsAdaptorFrame(closure_id, translation_size); |
| break; |
| case STUB: |
| translation->BeginCompiledStubFrame(); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| int object_index = 0; |
| int dematerialized_index = 0; |
| for (int i = 0; i < translation_size; ++i) { |
| LOperand* value = environment->values()->at(i); |
| AddToTranslation(environment, |
| translation, |
| value, |
| environment->HasTaggedValueAt(i), |
| environment->HasUint32ValueAt(i), |
| &object_index, |
| &dematerialized_index); |
| } |
| } |
| |
| |
| void LCodeGen::AddToTranslation(LEnvironment* environment, |
| Translation* translation, |
| LOperand* op, |
| bool is_tagged, |
| bool is_uint32, |
| int* object_index_pointer, |
| int* dematerialized_index_pointer) { |
| if (op == LEnvironment::materialization_marker()) { |
| int object_index = (*object_index_pointer)++; |
| if (environment->ObjectIsDuplicateAt(object_index)) { |
| int dupe_of = environment->ObjectDuplicateOfAt(object_index); |
| translation->DuplicateObject(dupe_of); |
| return; |
| } |
| int object_length = environment->ObjectLengthAt(object_index); |
| if (environment->ObjectIsArgumentsAt(object_index)) { |
| translation->BeginArgumentsObject(object_length); |
| } else { |
| translation->BeginCapturedObject(object_length); |
| } |
| int dematerialized_index = *dematerialized_index_pointer; |
| int env_offset = environment->translation_size() + dematerialized_index; |
| *dematerialized_index_pointer += object_length; |
| for (int i = 0; i < object_length; ++i) { |
| LOperand* value = environment->values()->at(env_offset + i); |
| AddToTranslation(environment, |
| translation, |
| value, |
| environment->HasTaggedValueAt(env_offset + i), |
| environment->HasUint32ValueAt(env_offset + i), |
| object_index_pointer, |
| dematerialized_index_pointer); |
| } |
| return; |
| } |
| |
| if (op->IsStackSlot()) { |
| if (is_tagged) { |
| translation->StoreStackSlot(op->index()); |
| } else if (is_uint32) { |
| translation->StoreUint32StackSlot(op->index()); |
| } else { |
| translation->StoreInt32StackSlot(op->index()); |
| } |
| } else if (op->IsDoubleStackSlot()) { |
| translation->StoreDoubleStackSlot(op->index()); |
| } else if (op->IsRegister()) { |
| Register reg = ToRegister(op); |
| if (is_tagged) { |
| translation->StoreRegister(reg); |
| } else if (is_uint32) { |
| translation->StoreUint32Register(reg); |
| } else { |
| translation->StoreInt32Register(reg); |
| } |
| } else if (op->IsDoubleRegister()) { |
| X87Register reg = ToX87Register(op); |
| translation->StoreDoubleRegister(reg); |
| } else if (op->IsConstantOperand()) { |
| HConstant* constant = chunk()->LookupConstant(LConstantOperand::cast(op)); |
| int src_index = DefineDeoptimizationLiteral(constant->handle(isolate())); |
| translation->StoreLiteral(src_index); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::CallCodeGeneric(Handle<Code> code, |
| RelocInfo::Mode mode, |
| LInstruction* instr, |
| SafepointMode safepoint_mode) { |
| DCHECK(instr != NULL); |
| __ call(code, mode); |
| RecordSafepointWithLazyDeopt(instr, safepoint_mode); |
| |
| // Signal that we don't inline smi code before these stubs in the |
| // optimizing code generator. |
| if (code->kind() == Code::BINARY_OP_IC || |
| code->kind() == Code::COMPARE_IC) { |
| __ nop(); |
| } |
| } |
| |
| |
| void LCodeGen::CallCode(Handle<Code> code, |
| RelocInfo::Mode mode, |
| LInstruction* instr) { |
| CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT); |
| } |
| |
| |
| void LCodeGen::CallRuntime(const Runtime::Function* fun, int argc, |
| LInstruction* instr, SaveFPRegsMode save_doubles) { |
| DCHECK(instr != NULL); |
| DCHECK(instr->HasPointerMap()); |
| |
| __ CallRuntime(fun, argc, save_doubles); |
| |
| RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| |
| DCHECK(info()->is_calling()); |
| } |
| |
| |
| void LCodeGen::LoadContextFromDeferred(LOperand* context) { |
| if (context->IsRegister()) { |
| if (!ToRegister(context).is(esi)) { |
| __ mov(esi, ToRegister(context)); |
| } |
| } else if (context->IsStackSlot()) { |
| __ mov(esi, ToOperand(context)); |
| } else if (context->IsConstantOperand()) { |
| HConstant* constant = |
| chunk_->LookupConstant(LConstantOperand::cast(context)); |
| __ LoadObject(esi, Handle<Object>::cast(constant->handle(isolate()))); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id, |
| int argc, |
| LInstruction* instr, |
| LOperand* context) { |
| LoadContextFromDeferred(context); |
| |
| __ CallRuntimeSaveDoubles(id); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), argc, Safepoint::kNoLazyDeopt); |
| |
| DCHECK(info()->is_calling()); |
| } |
| |
| |
| void LCodeGen::RegisterEnvironmentForDeoptimization( |
| LEnvironment* environment, Safepoint::DeoptMode mode) { |
| environment->set_has_been_used(); |
| if (!environment->HasBeenRegistered()) { |
| // Physical stack frame layout: |
| // -x ............. -4 0 ..................................... y |
| // [incoming arguments] [spill slots] [pushed outgoing arguments] |
| |
| // Layout of the environment: |
| // 0 ..................................................... size-1 |
| // [parameters] [locals] [expression stack including arguments] |
| |
| // Layout of the translation: |
| // 0 ........................................................ size - 1 + 4 |
| // [expression stack including arguments] [locals] [4 words] [parameters] |
| // |>------------ translation_size ------------<| |
| |
| int frame_count = 0; |
| int jsframe_count = 0; |
| for (LEnvironment* e = environment; e != NULL; e = e->outer()) { |
| ++frame_count; |
| if (e->frame_type() == JS_FUNCTION) { |
| ++jsframe_count; |
| } |
| } |
| Translation translation(&translations_, frame_count, jsframe_count, zone()); |
| WriteTranslation(environment, &translation); |
| int deoptimization_index = deoptimizations_.length(); |
| int pc_offset = masm()->pc_offset(); |
| environment->Register(deoptimization_index, |
| translation.index(), |
| (mode == Safepoint::kLazyDeopt) ? pc_offset : -1); |
| deoptimizations_.Add(environment, zone()); |
| } |
| } |
| |
| |
| void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr, |
| const char* detail, |
| Deoptimizer::BailoutType bailout_type) { |
| LEnvironment* environment = instr->environment(); |
| RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); |
| DCHECK(environment->HasBeenRegistered()); |
| int id = environment->deoptimization_index(); |
| DCHECK(info()->IsOptimizing() || info()->IsStub()); |
| Address entry = |
| Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type); |
| if (entry == NULL) { |
| Abort(kBailoutWasNotPrepared); |
| return; |
| } |
| |
| if (DeoptEveryNTimes()) { |
| ExternalReference count = ExternalReference::stress_deopt_count(isolate()); |
| Label no_deopt; |
| __ pushfd(); |
| __ push(eax); |
| __ mov(eax, Operand::StaticVariable(count)); |
| __ sub(eax, Immediate(1)); |
| __ j(not_zero, &no_deopt, Label::kNear); |
| if (FLAG_trap_on_deopt) __ int3(); |
| __ mov(eax, Immediate(FLAG_deopt_every_n_times)); |
| __ mov(Operand::StaticVariable(count), eax); |
| __ pop(eax); |
| __ popfd(); |
| DCHECK(frame_is_built_); |
| // Put the x87 stack layout in TOS. |
| if (x87_stack_.depth() > 0) EmitFlushX87ForDeopt(); |
| __ push(Immediate(x87_stack_.GetLayout())); |
| __ fild_s(MemOperand(esp, 0)); |
| // Don't touch eflags. |
| __ lea(esp, Operand(esp, kPointerSize)); |
| __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| __ bind(&no_deopt); |
| __ mov(Operand::StaticVariable(count), eax); |
| __ pop(eax); |
| __ popfd(); |
| } |
| |
| // Put the x87 stack layout in TOS, so that we can save x87 fp registers in |
| // the correct location. |
| { |
| Label done; |
| if (cc != no_condition) __ j(NegateCondition(cc), &done, Label::kNear); |
| if (x87_stack_.depth() > 0) EmitFlushX87ForDeopt(); |
| |
| int x87_stack_layout = x87_stack_.GetLayout(); |
| __ push(Immediate(x87_stack_layout)); |
| __ fild_s(MemOperand(esp, 0)); |
| // Don't touch eflags. |
| __ lea(esp, Operand(esp, kPointerSize)); |
| __ bind(&done); |
| } |
| |
| if (info()->ShouldTrapOnDeopt()) { |
| Label done; |
| if (cc != no_condition) __ j(NegateCondition(cc), &done, Label::kNear); |
| __ int3(); |
| __ bind(&done); |
| } |
| |
| Deoptimizer::Reason reason(instr->hydrogen_value()->position().raw(), |
| instr->Mnemonic(), detail); |
| DCHECK(info()->IsStub() || frame_is_built_); |
| if (cc == no_condition && frame_is_built_) { |
| DeoptComment(reason); |
| __ call(entry, RelocInfo::RUNTIME_ENTRY); |
| } else { |
| Deoptimizer::JumpTableEntry table_entry(entry, reason, bailout_type, |
| !frame_is_built_); |
| // We often have several deopts to the same entry, reuse the last |
| // jump entry if this is the case. |
| if (jump_table_.is_empty() || |
| !table_entry.IsEquivalentTo(jump_table_.last())) { |
| jump_table_.Add(table_entry, zone()); |
| } |
| if (cc == no_condition) { |
| __ jmp(&jump_table_.last().label); |
| } else { |
| __ j(cc, &jump_table_.last().label); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr, |
| const char* detail) { |
| Deoptimizer::BailoutType bailout_type = info()->IsStub() |
| ? Deoptimizer::LAZY |
| : Deoptimizer::EAGER; |
| DeoptimizeIf(cc, instr, detail, bailout_type); |
| } |
| |
| |
| void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) { |
| int length = deoptimizations_.length(); |
| if (length == 0) return; |
| Handle<DeoptimizationInputData> data = |
| DeoptimizationInputData::New(isolate(), length, TENURED); |
| |
| Handle<ByteArray> translations = |
| translations_.CreateByteArray(isolate()->factory()); |
| data->SetTranslationByteArray(*translations); |
| data->SetInlinedFunctionCount(Smi::FromInt(inlined_function_count_)); |
| data->SetOptimizationId(Smi::FromInt(info_->optimization_id())); |
| if (info_->IsOptimizing()) { |
| // Reference to shared function info does not change between phases. |
| AllowDeferredHandleDereference allow_handle_dereference; |
| data->SetSharedFunctionInfo(*info_->shared_info()); |
| } else { |
| data->SetSharedFunctionInfo(Smi::FromInt(0)); |
| } |
| |
| Handle<FixedArray> literals = |
| factory()->NewFixedArray(deoptimization_literals_.length(), TENURED); |
| { AllowDeferredHandleDereference copy_handles; |
| for (int i = 0; i < deoptimization_literals_.length(); i++) { |
| literals->set(i, *deoptimization_literals_[i]); |
| } |
| data->SetLiteralArray(*literals); |
| } |
| |
| data->SetOsrAstId(Smi::FromInt(info_->osr_ast_id().ToInt())); |
| data->SetOsrPcOffset(Smi::FromInt(osr_pc_offset_)); |
| |
| // Populate the deoptimization entries. |
| for (int i = 0; i < length; i++) { |
| LEnvironment* env = deoptimizations_[i]; |
| data->SetAstId(i, env->ast_id()); |
| data->SetTranslationIndex(i, Smi::FromInt(env->translation_index())); |
| data->SetArgumentsStackHeight(i, |
| Smi::FromInt(env->arguments_stack_height())); |
| data->SetPc(i, Smi::FromInt(env->pc_offset())); |
| } |
| code->set_deoptimization_data(*data); |
| } |
| |
| |
| int LCodeGen::DefineDeoptimizationLiteral(Handle<Object> literal) { |
| int result = deoptimization_literals_.length(); |
| for (int i = 0; i < deoptimization_literals_.length(); ++i) { |
| if (deoptimization_literals_[i].is_identical_to(literal)) return i; |
| } |
| deoptimization_literals_.Add(literal, zone()); |
| return result; |
| } |
| |
| |
| void LCodeGen::PopulateDeoptimizationLiteralsWithInlinedFunctions() { |
| DCHECK(deoptimization_literals_.length() == 0); |
| |
| const ZoneList<Handle<JSFunction> >* inlined_closures = |
| chunk()->inlined_closures(); |
| |
| for (int i = 0, length = inlined_closures->length(); |
| i < length; |
| i++) { |
| DefineDeoptimizationLiteral(inlined_closures->at(i)); |
| } |
| |
| inlined_function_count_ = deoptimization_literals_.length(); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithLazyDeopt( |
| LInstruction* instr, SafepointMode safepoint_mode) { |
| if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) { |
| RecordSafepoint(instr->pointer_map(), Safepoint::kLazyDeopt); |
| } else { |
| DCHECK(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kLazyDeopt); |
| } |
| } |
| |
| |
| void LCodeGen::RecordSafepoint( |
| LPointerMap* pointers, |
| Safepoint::Kind kind, |
| int arguments, |
| Safepoint::DeoptMode deopt_mode) { |
| DCHECK(kind == expected_safepoint_kind_); |
| const ZoneList<LOperand*>* operands = pointers->GetNormalizedOperands(); |
| Safepoint safepoint = |
| safepoints_.DefineSafepoint(masm(), kind, arguments, deopt_mode); |
| for (int i = 0; i < operands->length(); i++) { |
| LOperand* pointer = operands->at(i); |
| if (pointer->IsStackSlot()) { |
| safepoint.DefinePointerSlot(pointer->index(), zone()); |
| } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) { |
| safepoint.DefinePointerRegister(ToRegister(pointer), zone()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(LPointerMap* pointers, |
| Safepoint::DeoptMode mode) { |
| RecordSafepoint(pointers, Safepoint::kSimple, 0, mode); |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(Safepoint::DeoptMode mode) { |
| LPointerMap empty_pointers(zone()); |
| RecordSafepoint(&empty_pointers, mode); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers, |
| int arguments, |
| Safepoint::DeoptMode mode) { |
| RecordSafepoint(pointers, Safepoint::kWithRegisters, arguments, mode); |
| } |
| |
| |
| void LCodeGen::RecordAndWritePosition(int position) { |
| if (position == RelocInfo::kNoPosition) return; |
| masm()->positions_recorder()->RecordPosition(position); |
| masm()->positions_recorder()->WriteRecordedPositions(); |
| } |
| |
| |
| static const char* LabelType(LLabel* label) { |
| if (label->is_loop_header()) return " (loop header)"; |
| if (label->is_osr_entry()) return " (OSR entry)"; |
| return ""; |
| } |
| |
| |
| void LCodeGen::DoLabel(LLabel* label) { |
| Comment(";;; <@%d,#%d> -------------------- B%d%s --------------------", |
| current_instruction_, |
| label->hydrogen_value()->id(), |
| label->block_id(), |
| LabelType(label)); |
| __ bind(label->label()); |
| current_block_ = label->block_id(); |
| if (label->block()->predecessors()->length() > 1) { |
| // A join block's x87 stack is that of its last visited predecessor. |
| // If the last visited predecessor block is unreachable, the stack state |
| // will be wrong. In such case, use the x87 stack of reachable predecessor. |
| X87StackMap::const_iterator it = x87_stack_map_.find(current_block_); |
| // Restore x87 stack. |
| if (it != x87_stack_map_.end()) { |
| x87_stack_ = *(it->second); |
| } |
| } |
| DoGap(label); |
| } |
| |
| |
| void LCodeGen::DoParallelMove(LParallelMove* move) { |
| resolver_.Resolve(move); |
| } |
| |
| |
| void LCodeGen::DoGap(LGap* gap) { |
| for (int i = LGap::FIRST_INNER_POSITION; |
| i <= LGap::LAST_INNER_POSITION; |
| i++) { |
| LGap::InnerPosition inner_pos = static_cast<LGap::InnerPosition>(i); |
| LParallelMove* move = gap->GetParallelMove(inner_pos); |
| if (move != NULL) DoParallelMove(move); |
| } |
| } |
| |
| |
| void LCodeGen::DoInstructionGap(LInstructionGap* instr) { |
| DoGap(instr); |
| } |
| |
| |
| void LCodeGen::DoParameter(LParameter* instr) { |
| // Nothing to do. |
| } |
| |
| |
| void LCodeGen::DoCallStub(LCallStub* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| switch (instr->hydrogen()->major_key()) { |
| case CodeStub::RegExpExec: { |
| RegExpExecStub stub(isolate()); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::SubString: { |
| SubStringStub stub(isolate()); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::StringCompare: { |
| StringCompareStub stub(isolate()); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { |
| GenerateOsrPrologue(); |
| } |
| |
| |
| void LCodeGen::DoModByPowerOf2I(LModByPowerOf2I* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| DCHECK(dividend.is(ToRegister(instr->result()))); |
| |
| // Theoretically, a variation of the branch-free code for integer division by |
| // a power of 2 (calculating the remainder via an additional multiplication |
| // (which gets simplified to an 'and') and subtraction) should be faster, and |
| // this is exactly what GCC and clang emit. Nevertheless, benchmarks seem to |
| // indicate that positive dividends are heavily favored, so the branching |
| // version performs better. |
| HMod* hmod = instr->hydrogen(); |
| int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1); |
| Label dividend_is_not_negative, done; |
| if (hmod->CheckFlag(HValue::kLeftCanBeNegative)) { |
| __ test(dividend, dividend); |
| __ j(not_sign, ÷nd_is_not_negative, Label::kNear); |
| // Note that this is correct even for kMinInt operands. |
| __ neg(dividend); |
| __ and_(dividend, mask); |
| __ neg(dividend); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(zero, instr, "minus zero"); |
| } |
| __ jmp(&done, Label::kNear); |
| } |
| |
| __ bind(÷nd_is_not_negative); |
| __ and_(dividend, mask); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoModByConstI(LModByConstI* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| if (divisor == 0) { |
| DeoptimizeIf(no_condition, instr, "division by zero"); |
| return; |
| } |
| |
| __ TruncatingDiv(dividend, Abs(divisor)); |
| __ imul(edx, edx, Abs(divisor)); |
| __ mov(eax, dividend); |
| __ sub(eax, edx); |
| |
| // Check for negative zero. |
| HMod* hmod = instr->hydrogen(); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label remainder_not_zero; |
| __ j(not_zero, &remainder_not_zero, Label::kNear); |
| __ cmp(dividend, Immediate(0)); |
| DeoptimizeIf(less, instr, "minus zero"); |
| __ bind(&remainder_not_zero); |
| } |
| } |
| |
| |
| void LCodeGen::DoModI(LModI* instr) { |
| HMod* hmod = instr->hydrogen(); |
| |
| Register left_reg = ToRegister(instr->left()); |
| DCHECK(left_reg.is(eax)); |
| Register right_reg = ToRegister(instr->right()); |
| DCHECK(!right_reg.is(eax)); |
| DCHECK(!right_reg.is(edx)); |
| Register result_reg = ToRegister(instr->result()); |
| DCHECK(result_reg.is(edx)); |
| |
| Label done; |
| // Check for x % 0, idiv would signal a divide error. We have to |
| // deopt in this case because we can't return a NaN. |
| if (hmod->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ test(right_reg, Operand(right_reg)); |
| DeoptimizeIf(zero, instr, "division by zero"); |
| } |
| |
| // Check for kMinInt % -1, idiv would signal a divide error. We |
| // have to deopt if we care about -0, because we can't return that. |
| if (hmod->CheckFlag(HValue::kCanOverflow)) { |
| Label no_overflow_possible; |
| __ cmp(left_reg, kMinInt); |
| __ j(not_equal, &no_overflow_possible, Label::kNear); |
| __ cmp(right_reg, -1); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(equal, instr, "minus zero"); |
| } else { |
| __ j(not_equal, &no_overflow_possible, Label::kNear); |
| __ Move(result_reg, Immediate(0)); |
| __ jmp(&done, Label::kNear); |
| } |
| __ bind(&no_overflow_possible); |
| } |
| |
| // Sign extend dividend in eax into edx:eax. |
| __ cdq(); |
| |
| // If we care about -0, test if the dividend is <0 and the result is 0. |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label positive_left; |
| __ test(left_reg, Operand(left_reg)); |
| __ j(not_sign, &positive_left, Label::kNear); |
| __ idiv(right_reg); |
| __ test(result_reg, Operand(result_reg)); |
| DeoptimizeIf(zero, instr, "minus zero"); |
| __ jmp(&done, Label::kNear); |
| __ bind(&positive_left); |
| } |
| __ idiv(right_reg); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDivByPowerOf2I(LDivByPowerOf2I* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| Register result = ToRegister(instr->result()); |
| DCHECK(divisor == kMinInt || base::bits::IsPowerOfTwo32(Abs(divisor))); |
| DCHECK(!result.is(dividend)); |
| |
| // Check for (0 / -x) that will produce negative zero. |
| HDiv* hdiv = instr->hydrogen(); |
| if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| __ test(dividend, dividend); |
| DeoptimizeIf(zero, instr, "minus zero"); |
| } |
| // Check for (kMinInt / -1). |
| if (hdiv->CheckFlag(HValue::kCanOverflow) && divisor == -1) { |
| __ cmp(dividend, kMinInt); |
| DeoptimizeIf(zero, instr, "overflow"); |
| } |
| // Deoptimize if remainder will not be 0. |
| if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) && |
| divisor != 1 && divisor != -1) { |
| int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1); |
| __ test(dividend, Immediate(mask)); |
| DeoptimizeIf(not_zero, instr, "lost precision"); |
| } |
| __ Move(result, dividend); |
| int32_t shift = WhichPowerOf2Abs(divisor); |
| if (shift > 0) { |
| // The arithmetic shift is always OK, the 'if' is an optimization only. |
| if (shift > 1) __ sar(result, 31); |
| __ shr(result, 32 - shift); |
| __ add(result, dividend); |
| __ sar(result, shift); |
| } |
| if (divisor < 0) __ neg(result); |
| } |
| |
| |
| void LCodeGen::DoDivByConstI(LDivByConstI* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| DCHECK(ToRegister(instr->result()).is(edx)); |
| |
| if (divisor == 0) { |
| DeoptimizeIf(no_condition, instr, "division by zero"); |
| return; |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| HDiv* hdiv = instr->hydrogen(); |
| if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| __ test(dividend, dividend); |
| DeoptimizeIf(zero, instr, "minus zero"); |
| } |
| |
| __ TruncatingDiv(dividend, Abs(divisor)); |
| if (divisor < 0) __ neg(edx); |
| |
| if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) { |
| __ mov(eax, edx); |
| __ imul(eax, eax, divisor); |
| __ sub(eax, dividend); |
| DeoptimizeIf(not_equal, instr, "lost precision"); |
| } |
| } |
| |
| |
| // TODO(svenpanne) Refactor this to avoid code duplication with DoFlooringDivI. |
| void LCodeGen::DoDivI(LDivI* instr) { |
| HBinaryOperation* hdiv = instr->hydrogen(); |
| Register dividend = ToRegister(instr->dividend()); |
| Register divisor = ToRegister(instr->divisor()); |
| Register remainder = ToRegister(instr->temp()); |
| DCHECK(dividend.is(eax)); |
| DCHECK(remainder.is(edx)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| DCHECK(!divisor.is(eax)); |
| DCHECK(!divisor.is(edx)); |
| |
| // Check for x / 0. |
| if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ test(divisor, divisor); |
| DeoptimizeIf(zero, instr, "division by zero"); |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label dividend_not_zero; |
| __ test(dividend, dividend); |
| __ j(not_zero, ÷nd_not_zero, Label::kNear); |
| __ test(divisor, divisor); |
| DeoptimizeIf(sign, instr, "minus zero"); |
| __ bind(÷nd_not_zero); |
| } |
| |
| // Check for (kMinInt / -1). |
| if (hdiv->CheckFlag(HValue::kCanOverflow)) { |
| Label dividend_not_min_int; |
| __ cmp(dividend, kMinInt); |
| __ j(not_zero, ÷nd_not_min_int, Label::kNear); |
| __ cmp(divisor, -1); |
| DeoptimizeIf(zero, instr, "overflow"); |
| __ bind(÷nd_not_min_int); |
| } |
| |
| // Sign extend to edx (= remainder). |
| __ cdq(); |
| __ idiv(divisor); |
| |
| if (!hdiv->CheckFlag(HValue::kAllUsesTruncatingToInt32)) { |
| // Deoptimize if remainder is not 0. |
| __ test(remainder, remainder); |
| DeoptimizeIf(not_zero, instr, "lost precision"); |
| } |
| } |
| |
| |
| void LCodeGen::DoFlooringDivByPowerOf2I(LFlooringDivByPowerOf2I* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| DCHECK(dividend.is(ToRegister(instr->result()))); |
| |
| // If the divisor is positive, things are easy: There can be no deopts and we |
| // can simply do an arithmetic right shift. |
| if (divisor == 1) return; |
| int32_t shift = WhichPowerOf2Abs(divisor); |
| if (divisor > 1) { |
| __ sar(dividend, shift); |
| return; |
| } |
| |
| // If the divisor is negative, we have to negate and handle edge cases. |
| __ neg(dividend); |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(zero, instr, "minus zero"); |
| } |
| |
| // Dividing by -1 is basically negation, unless we overflow. |
| if (divisor == -1) { |
| if (instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) { |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| return; |
| } |
| |
| // If the negation could not overflow, simply shifting is OK. |
| if (!instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) { |
| __ sar(dividend, shift); |
| return; |
| } |
| |
| Label not_kmin_int, done; |
| __ j(no_overflow, ¬_kmin_int, Label::kNear); |
| __ mov(dividend, Immediate(kMinInt / divisor)); |
| __ jmp(&done, Label::kNear); |
| __ bind(¬_kmin_int); |
| __ sar(dividend, shift); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoFlooringDivByConstI(LFlooringDivByConstI* instr) { |
| Register dividend = ToRegister(instr->dividend()); |
| int32_t divisor = instr->divisor(); |
| DCHECK(ToRegister(instr->result()).is(edx)); |
| |
| if (divisor == 0) { |
| DeoptimizeIf(no_condition, instr, "division by zero"); |
| return; |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| HMathFloorOfDiv* hdiv = instr->hydrogen(); |
| if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) { |
| __ test(dividend, dividend); |
| DeoptimizeIf(zero, instr, "minus zero"); |
| } |
| |
| // Easy case: We need no dynamic check for the dividend and the flooring |
| // division is the same as the truncating division. |
| if ((divisor > 0 && !hdiv->CheckFlag(HValue::kLeftCanBeNegative)) || |
| (divisor < 0 && !hdiv->CheckFlag(HValue::kLeftCanBePositive))) { |
| __ TruncatingDiv(dividend, Abs(divisor)); |
| if (divisor < 0) __ neg(edx); |
| return; |
| } |
| |
| // In the general case we may need to adjust before and after the truncating |
| // division to get a flooring division. |
| Register temp = ToRegister(instr->temp3()); |
| DCHECK(!temp.is(dividend) && !temp.is(eax) && !temp.is(edx)); |
| Label needs_adjustment, done; |
| __ cmp(dividend, Immediate(0)); |
| __ j(divisor > 0 ? less : greater, &needs_adjustment, Label::kNear); |
| __ TruncatingDiv(dividend, Abs(divisor)); |
| if (divisor < 0) __ neg(edx); |
| __ jmp(&done, Label::kNear); |
| __ bind(&needs_adjustment); |
| __ lea(temp, Operand(dividend, divisor > 0 ? 1 : -1)); |
| __ TruncatingDiv(temp, Abs(divisor)); |
| if (divisor < 0) __ neg(edx); |
| __ dec(edx); |
| __ bind(&done); |
| } |
| |
| |
| // TODO(svenpanne) Refactor this to avoid code duplication with DoDivI. |
| void LCodeGen::DoFlooringDivI(LFlooringDivI* instr) { |
| HBinaryOperation* hdiv = instr->hydrogen(); |
| Register dividend = ToRegister(instr->dividend()); |
| Register divisor = ToRegister(instr->divisor()); |
| Register remainder = ToRegister(instr->temp()); |
| Register result = ToRegister(instr->result()); |
| DCHECK(dividend.is(eax)); |
| DCHECK(remainder.is(edx)); |
| DCHECK(result.is(eax)); |
| DCHECK(!divisor.is(eax)); |
| DCHECK(!divisor.is(edx)); |
| |
| // Check for x / 0. |
| if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ test(divisor, divisor); |
| DeoptimizeIf(zero, instr, "division by zero"); |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label dividend_not_zero; |
| __ test(dividend, dividend); |
| __ j(not_zero, ÷nd_not_zero, Label::kNear); |
| __ test(divisor, divisor); |
| DeoptimizeIf(sign, instr, "minus zero"); |
| __ bind(÷nd_not_zero); |
| } |
| |
| // Check for (kMinInt / -1). |
| if (hdiv->CheckFlag(HValue::kCanOverflow)) { |
| Label dividend_not_min_int; |
| __ cmp(dividend, kMinInt); |
| __ j(not_zero, ÷nd_not_min_int, Label::kNear); |
| __ cmp(divisor, -1); |
| DeoptimizeIf(zero, instr, "overflow"); |
| __ bind(÷nd_not_min_int); |
| } |
| |
| // Sign extend to edx (= remainder). |
| __ cdq(); |
| __ idiv(divisor); |
| |
| Label done; |
| __ test(remainder, remainder); |
| __ j(zero, &done, Label::kNear); |
| __ xor_(remainder, divisor); |
| __ sar(remainder, 31); |
| __ add(result, remainder); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMulI(LMulI* instr) { |
| Register left = ToRegister(instr->left()); |
| LOperand* right = instr->right(); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ mov(ToRegister(instr->temp()), left); |
| } |
| |
| if (right->IsConstantOperand()) { |
| // Try strength reductions on the multiplication. |
| // All replacement instructions are at most as long as the imul |
| // and have better latency. |
| int constant = ToInteger32(LConstantOperand::cast(right)); |
| if (constant == -1) { |
| __ neg(left); |
| } else if (constant == 0) { |
| __ xor_(left, Operand(left)); |
| } else if (constant == 2) { |
| __ add(left, Operand(left)); |
| } else if (!instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| // If we know that the multiplication can't overflow, it's safe to |
| // use instructions that don't set the overflow flag for the |
| // multiplication. |
| switch (constant) { |
| case 1: |
| // Do nothing. |
| break; |
| case 3: |
| __ lea(left, Operand(left, left, times_2, 0)); |
| break; |
| case 4: |
| __ shl(left, 2); |
| break; |
| case 5: |
| __ lea(left, Operand(left, left, times_4, 0)); |
| break; |
| case 8: |
| __ shl(left, 3); |
| break; |
| case 9: |
| __ lea(left, Operand(left, left, times_8, 0)); |
| break; |
| case 16: |
| __ shl(left, 4); |
| break; |
| default: |
| __ imul(left, left, constant); |
| break; |
| } |
| } else { |
| __ imul(left, left, constant); |
| } |
| } else { |
| if (instr->hydrogen()->representation().IsSmi()) { |
| __ SmiUntag(left); |
| } |
| __ imul(left, ToOperand(right)); |
| } |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| // Bail out if the result is supposed to be negative zero. |
| Label done; |
| __ test(left, Operand(left)); |
| __ j(not_zero, &done); |
| if (right->IsConstantOperand()) { |
| if (ToInteger32(LConstantOperand::cast(right)) < 0) { |
| DeoptimizeIf(no_condition, instr, "minus zero"); |
| } else if (ToInteger32(LConstantOperand::cast(right)) == 0) { |
| __ cmp(ToRegister(instr->temp()), Immediate(0)); |
| DeoptimizeIf(less, instr, "minus zero"); |
| } |
| } else { |
| // Test the non-zero operand for negative sign. |
| __ or_(ToRegister(instr->temp()), ToOperand(right)); |
| DeoptimizeIf(sign, instr, "minus zero"); |
| } |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoBitI(LBitI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| DCHECK(left->Equals(instr->result())); |
| DCHECK(left->IsRegister()); |
| |
| if (right->IsConstantOperand()) { |
| int32_t right_operand = |
| ToRepresentation(LConstantOperand::cast(right), |
| instr->hydrogen()->representation()); |
| switch (instr->op()) { |
| case Token::BIT_AND: |
| __ and_(ToRegister(left), right_operand); |
| break; |
| case Token::BIT_OR: |
| __ or_(ToRegister(left), right_operand); |
| break; |
| case Token::BIT_XOR: |
| if (right_operand == int32_t(~0)) { |
| __ not_(ToRegister(left)); |
| } else { |
| __ xor_(ToRegister(left), right_operand); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } else { |
| switch (instr->op()) { |
| case Token::BIT_AND: |
| __ and_(ToRegister(left), ToOperand(right)); |
| break; |
| case Token::BIT_OR: |
| __ or_(ToRegister(left), ToOperand(right)); |
| break; |
| case Token::BIT_XOR: |
| __ xor_(ToRegister(left), ToOperand(right)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoShiftI(LShiftI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| DCHECK(left->Equals(instr->result())); |
| DCHECK(left->IsRegister()); |
| if (right->IsRegister()) { |
| DCHECK(ToRegister(right).is(ecx)); |
| |
| switch (instr->op()) { |
| case Token::ROR: |
| __ ror_cl(ToRegister(left)); |
| break; |
| case Token::SAR: |
| __ sar_cl(ToRegister(left)); |
| break; |
| case Token::SHR: |
| __ shr_cl(ToRegister(left)); |
| if (instr->can_deopt()) { |
| __ test(ToRegister(left), ToRegister(left)); |
| DeoptimizeIf(sign, instr, "negative value"); |
| } |
| break; |
| case Token::SHL: |
| __ shl_cl(ToRegister(left)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } else { |
| int value = ToInteger32(LConstantOperand::cast(right)); |
| uint8_t shift_count = static_cast<uint8_t>(value & 0x1F); |
| switch (instr->op()) { |
| case Token::ROR: |
| if (shift_count == 0 && instr->can_deopt()) { |
| __ test(ToRegister(left), ToRegister(left)); |
| DeoptimizeIf(sign, instr, "negative value"); |
| } else { |
| __ ror(ToRegister(left), shift_count); |
| } |
| break; |
| case Token::SAR: |
| if (shift_count != 0) { |
| __ sar(ToRegister(left), shift_count); |
| } |
| break; |
| case Token::SHR: |
| if (shift_count != 0) { |
| __ shr(ToRegister(left), shift_count); |
| } else if (instr->can_deopt()) { |
| __ test(ToRegister(left), ToRegister(left)); |
| DeoptimizeIf(sign, instr, "negative value"); |
| } |
| break; |
| case Token::SHL: |
| if (shift_count != 0) { |
| if (instr->hydrogen_value()->representation().IsSmi() && |
| instr->can_deopt()) { |
| if (shift_count != 1) { |
| __ shl(ToRegister(left), shift_count - 1); |
| } |
| __ SmiTag(ToRegister(left)); |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } else { |
| __ shl(ToRegister(left), shift_count); |
| } |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoSubI(LSubI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| DCHECK(left->Equals(instr->result())); |
| |
| if (right->IsConstantOperand()) { |
| __ sub(ToOperand(left), |
| ToImmediate(right, instr->hydrogen()->representation())); |
| } else { |
| __ sub(ToRegister(left), ToOperand(right)); |
| } |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| } |
| |
| |
| void LCodeGen::DoConstantI(LConstantI* instr) { |
| __ Move(ToRegister(instr->result()), Immediate(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoConstantS(LConstantS* instr) { |
| __ Move(ToRegister(instr->result()), Immediate(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoConstantD(LConstantD* instr) { |
| double v = instr->value(); |
| uint64_t int_val = bit_cast<uint64_t, double>(v); |
| int32_t lower = static_cast<int32_t>(int_val); |
| int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt)); |
| DCHECK(instr->result()->IsDoubleRegister()); |
| |
| __ push(Immediate(upper)); |
| __ push(Immediate(lower)); |
| X87Register reg = ToX87Register(instr->result()); |
| X87Mov(reg, Operand(esp, 0)); |
| __ add(Operand(esp), Immediate(kDoubleSize)); |
| } |
| |
| |
| void LCodeGen::DoConstantE(LConstantE* instr) { |
| __ lea(ToRegister(instr->result()), Operand::StaticVariable(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoConstantT(LConstantT* instr) { |
| Register reg = ToRegister(instr->result()); |
| Handle<Object> object = instr->value(isolate()); |
| AllowDeferredHandleDereference smi_check; |
| __ LoadObject(reg, object); |
| } |
| |
| |
| void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register map = ToRegister(instr->value()); |
| __ EnumLength(result, map); |
| } |
| |
| |
| void LCodeGen::DoDateField(LDateField* instr) { |
| Register object = ToRegister(instr->date()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = ToRegister(instr->temp()); |
| Smi* index = instr->index(); |
| Label runtime, done; |
| DCHECK(object.is(result)); |
| DCHECK(object.is(eax)); |
| |
| __ test(object, Immediate(kSmiTagMask)); |
| DeoptimizeIf(zero, instr, "Smi"); |
| __ CmpObjectType(object, JS_DATE_TYPE, scratch); |
| DeoptimizeIf(not_equal, instr, "not a date object"); |
| |
| if (index->value() == 0) { |
| __ mov(result, FieldOperand(object, JSDate::kValueOffset)); |
| } else { |
| if (index->value() < JSDate::kFirstUncachedField) { |
| ExternalReference stamp = ExternalReference::date_cache_stamp(isolate()); |
| __ mov(scratch, Operand::StaticVariable(stamp)); |
| __ cmp(scratch, FieldOperand(object, JSDate::kCacheStampOffset)); |
| __ j(not_equal, &runtime, Label::kNear); |
| __ mov(result, FieldOperand(object, JSDate::kValueOffset + |
| kPointerSize * index->value())); |
| __ jmp(&done, Label::kNear); |
| } |
| __ bind(&runtime); |
| __ PrepareCallCFunction(2, scratch); |
| __ mov(Operand(esp, 0), object); |
| __ mov(Operand(esp, 1 * kPointerSize), Immediate(index)); |
| __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2); |
| __ bind(&done); |
| } |
| } |
| |
| |
| Operand LCodeGen::BuildSeqStringOperand(Register string, |
| LOperand* index, |
| String::Encoding encoding) { |
| if (index->IsConstantOperand()) { |
| int offset = ToRepresentation(LConstantOperand::cast(index), |
| Representation::Integer32()); |
| if (encoding == String::TWO_BYTE_ENCODING) { |
| offset *= kUC16Size; |
| } |
| STATIC_ASSERT(kCharSize == 1); |
| return FieldOperand(string, SeqString::kHeaderSize + offset); |
| } |
| return FieldOperand( |
| string, ToRegister(index), |
| encoding == String::ONE_BYTE_ENCODING ? times_1 : times_2, |
| SeqString::kHeaderSize); |
| } |
| |
| |
| void LCodeGen::DoSeqStringGetChar(LSeqStringGetChar* instr) { |
| String::Encoding encoding = instr->hydrogen()->encoding(); |
| Register result = ToRegister(instr->result()); |
| Register string = ToRegister(instr->string()); |
| |
| if (FLAG_debug_code) { |
| __ push(string); |
| __ mov(string, FieldOperand(string, HeapObject::kMapOffset)); |
| __ movzx_b(string, FieldOperand(string, Map::kInstanceTypeOffset)); |
| |
| __ and_(string, Immediate(kStringRepresentationMask | kStringEncodingMask)); |
| static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| __ cmp(string, Immediate(encoding == String::ONE_BYTE_ENCODING |
| ? one_byte_seq_type : two_byte_seq_type)); |
| __ Check(equal, kUnexpectedStringType); |
| __ pop(string); |
| } |
| |
| Operand operand = BuildSeqStringOperand(string, instr->index(), encoding); |
| if (encoding == String::ONE_BYTE_ENCODING) { |
| __ movzx_b(result, operand); |
| } else { |
| __ movzx_w(result, operand); |
| } |
| } |
| |
| |
| void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) { |
| String::Encoding encoding = instr->hydrogen()->encoding(); |
| Register string = ToRegister(instr->string()); |
| |
| if (FLAG_debug_code) { |
| Register value = ToRegister(instr->value()); |
| Register index = ToRegister(instr->index()); |
| static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| int encoding_mask = |
| instr->hydrogen()->encoding() == String::ONE_BYTE_ENCODING |
| ? one_byte_seq_type : two_byte_seq_type; |
| __ EmitSeqStringSetCharCheck(string, index, value, encoding_mask); |
| } |
| |
| Operand operand = BuildSeqStringOperand(string, instr->index(), encoding); |
| if (instr->value()->IsConstantOperand()) { |
| int value = ToRepresentation(LConstantOperand::cast(instr->value()), |
| Representation::Integer32()); |
| DCHECK_LE(0, value); |
| if (encoding == String::ONE_BYTE_ENCODING) { |
| DCHECK_LE(value, String::kMaxOneByteCharCode); |
| __ mov_b(operand, static_cast<int8_t>(value)); |
| } else { |
| DCHECK_LE(value, String::kMaxUtf16CodeUnit); |
| __ mov_w(operand, static_cast<int16_t>(value)); |
| } |
| } else { |
| Register value = ToRegister(instr->value()); |
| if (encoding == String::ONE_BYTE_ENCODING) { |
| __ mov_b(operand, value); |
| } else { |
| __ mov_w(operand, value); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoAddI(LAddI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| |
| if (LAddI::UseLea(instr->hydrogen()) && !left->Equals(instr->result())) { |
| if (right->IsConstantOperand()) { |
| int32_t offset = ToRepresentation(LConstantOperand::cast(right), |
| instr->hydrogen()->representation()); |
| __ lea(ToRegister(instr->result()), MemOperand(ToRegister(left), offset)); |
| } else { |
| Operand address(ToRegister(left), ToRegister(right), times_1, 0); |
| __ lea(ToRegister(instr->result()), address); |
| } |
| } else { |
| if (right->IsConstantOperand()) { |
| __ add(ToOperand(left), |
| ToImmediate(right, instr->hydrogen()->representation())); |
| } else { |
| __ add(ToRegister(left), ToOperand(right)); |
| } |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoMathMinMax(LMathMinMax* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| DCHECK(left->Equals(instr->result())); |
| HMathMinMax::Operation operation = instr->hydrogen()->operation(); |
| if (instr->hydrogen()->representation().IsSmiOrInteger32()) { |
| Label return_left; |
| Condition condition = (operation == HMathMinMax::kMathMin) |
| ? less_equal |
| : greater_equal; |
| if (right->IsConstantOperand()) { |
| Operand left_op = ToOperand(left); |
| Immediate immediate = ToImmediate(LConstantOperand::cast(instr->right()), |
| instr->hydrogen()->representation()); |
| __ cmp(left_op, immediate); |
| __ j(condition, &return_left, Label::kNear); |
| __ mov(left_op, immediate); |
| } else { |
| Register left_reg = ToRegister(left); |
| Operand right_op = ToOperand(right); |
| __ cmp(left_reg, right_op); |
| __ j(condition, &return_left, Label::kNear); |
| __ mov(left_reg, right_op); |
| } |
| __ bind(&return_left); |
| } else { |
| DCHECK(instr->hydrogen()->representation().IsDouble()); |
| Label check_nan_left, check_zero, return_left, return_right; |
| Condition condition = (operation == HMathMinMax::kMathMin) ? below : above; |
| X87Register left_reg = ToX87Register(left); |
| X87Register right_reg = ToX87Register(right); |
| |
| X87PrepareBinaryOp(left_reg, right_reg, ToX87Register(instr->result())); |
| __ fld(1); |
| __ fld(1); |
| __ FCmp(); |
| __ j(parity_even, &check_nan_left, Label::kNear); // At least one NaN. |
| __ j(equal, &check_zero, Label::kNear); // left == right. |
| __ j(condition, &return_left, Label::kNear); |
| __ jmp(&return_right, Label::kNear); |
| |
| __ bind(&check_zero); |
| __ fld(0); |
| __ fldz(); |
| __ FCmp(); |
| __ j(not_equal, &return_left, Label::kNear); // left == right != 0. |
| // At this point, both left and right are either 0 or -0. |
| if (operation == HMathMinMax::kMathMin) { |
| // Push st0 and st1 to stack, then pop them to temp registers and OR them, |
| // load it to left. |
| Register scratch_reg = ToRegister(instr->temp()); |
| __ fld(1); |
| __ fld(1); |
| __ sub(esp, Immediate(2 * kPointerSize)); |
| __ fstp_s(MemOperand(esp, 0)); |
| __ fstp_s(MemOperand(esp, kPointerSize)); |
| __ pop(scratch_reg); |
| __ xor_(MemOperand(esp, 0), scratch_reg); |
| X87Mov(left_reg, MemOperand(esp, 0), kX87FloatOperand); |
| __ pop(scratch_reg); // restore esp |
| } else { |
| // Since we operate on +0 and/or -0, addsd and andsd have the same effect. |
| X87Fxch(left_reg); |
| __ fadd(1); |
| } |
| __ jmp(&return_left, Label::kNear); |
| |
| __ bind(&check_nan_left); |
| __ fld(0); |
| __ fld(0); |
| __ FCmp(); // NaN check. |
| __ j(parity_even, &return_left, Label::kNear); // left == NaN. |
| |
| __ bind(&return_right); |
| X87Fxch(left_reg); |
| X87Mov(left_reg, right_reg); |
| |
| __ bind(&return_left); |
| } |
| } |
| |
| |
| void LCodeGen::DoArithmeticD(LArithmeticD* instr) { |
| X87Register left = ToX87Register(instr->left()); |
| X87Register right = ToX87Register(instr->right()); |
| X87Register result = ToX87Register(instr->result()); |
| if (instr->op() != Token::MOD) { |
| X87PrepareBinaryOp(left, right, result); |
| } |
| // Set the precision control to double-precision. |
| __ X87SetFPUCW(0x027F); |
| switch (instr->op()) { |
| case Token::ADD: |
| __ fadd_i(1); |
| break; |
| case Token::SUB: |
| __ fsub_i(1); |
| break; |
| case Token::MUL: |
| __ fmul_i(1); |
| break; |
| case Token::DIV: |
| __ fdiv_i(1); |
| break; |
| case Token::MOD: { |
| // Pass two doubles as arguments on the stack. |
| __ PrepareCallCFunction(4, eax); |
| X87Mov(Operand(esp, 1 * kDoubleSize), right); |
| X87Mov(Operand(esp, 0), left); |
| X87Free(right); |
| DCHECK(left.is(result)); |
| X87PrepareToWrite(result); |
| __ CallCFunction( |
| ExternalReference::mod_two_doubles_operation(isolate()), |
| 4); |
| |
| // Return value is in st(0) on ia32. |
| X87CommitWrite(result); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| // Restore the default value of control word. |
| __ X87SetFPUCW(0x037F); |
| } |
| |
| |
| void LCodeGen::DoArithmeticT(LArithmeticT* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->left()).is(edx)); |
| DCHECK(ToRegister(instr->right()).is(eax)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| Handle<Code> code = |
| CodeFactory::BinaryOpIC(isolate(), instr->op(), NO_OVERWRITE).code(); |
| CallCode(code, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| template<class InstrType> |
| void LCodeGen::EmitBranch(InstrType instr, Condition cc) { |
| int left_block = instr->TrueDestination(chunk_); |
| int right_block = instr->FalseDestination(chunk_); |
| |
| int next_block = GetNextEmittedBlock(); |
| |
| if (right_block == left_block || cc == no_condition) { |
| EmitGoto(left_block); |
| } else if (left_block == next_block) { |
| __ j(NegateCondition(cc), chunk_->GetAssemblyLabel(right_block)); |
| } else if (right_block == next_block) { |
| __ j(cc, chunk_->GetAssemblyLabel(left_block)); |
| } else { |
| __ j(cc, chunk_->GetAssemblyLabel(left_block)); |
| __ jmp(chunk_->GetAssemblyLabel(right_block)); |
| } |
| } |
| |
| |
| template<class InstrType> |
| void LCodeGen::EmitFalseBranch(InstrType instr, Condition cc) { |
| int false_block = instr->FalseDestination(chunk_); |
| if (cc == no_condition) { |
| __ jmp(chunk_->GetAssemblyLabel(false_block)); |
| } else { |
| __ j(cc, chunk_->GetAssemblyLabel(false_block)); |
| } |
| } |
| |
| |
| void LCodeGen::DoBranch(LBranch* instr) { |
| Representation r = instr->hydrogen()->value()->representation(); |
| if (r.IsSmiOrInteger32()) { |
| Register reg = ToRegister(instr->value()); |
| __ test(reg, Operand(reg)); |
| EmitBranch(instr, not_zero); |
| } else if (r.IsDouble()) { |
| X87Register reg = ToX87Register(instr->value()); |
| X87LoadForUsage(reg); |
| __ fldz(); |
| __ FCmp(); |
| EmitBranch(instr, not_zero); |
| } else { |
| DCHECK(r.IsTagged()); |
| Register reg = ToRegister(instr->value()); |
| HType type = instr->hydrogen()->value()->type(); |
| if (type.IsBoolean()) { |
| DCHECK(!info()->IsStub()); |
| __ cmp(reg, factory()->true_value()); |
| EmitBranch(instr, equal); |
| } else if (type.IsSmi()) { |
| DCHECK(!info()->IsStub()); |
| __ test(reg, Operand(reg)); |
| EmitBranch(instr, not_equal); |
| } else if (type.IsJSArray()) { |
| DCHECK(!info()->IsStub()); |
| EmitBranch(instr, no_condition); |
| } else if (type.IsHeapNumber()) { |
| UNREACHABLE(); |
| } else if (type.IsString()) { |
| DCHECK(!info()->IsStub()); |
| __ cmp(FieldOperand(reg, String::kLengthOffset), Immediate(0)); |
| EmitBranch(instr, not_equal); |
| } else { |
| ToBooleanStub::Types expected = instr->hydrogen()->expected_input_types(); |
| if (expected.IsEmpty()) expected = ToBooleanStub::Types::Generic(); |
| |
| if (expected.Contains(ToBooleanStub::UNDEFINED)) { |
| // undefined -> false. |
| __ cmp(reg, factory()->undefined_value()); |
| __ j(equal, instr->FalseLabel(chunk_)); |
| } |
| if (expected.Contains(ToBooleanStub::BOOLEAN)) { |
| // true -> true. |
| __ cmp(reg, factory()->true_value()); |
| __ j(equal, instr->TrueLabel(chunk_)); |
| // false -> false. |
| __ cmp(reg, factory()->false_value()); |
| __ j(equal, instr->FalseLabel(chunk_)); |
| } |
| if (expected.Contains(ToBooleanStub::NULL_TYPE)) { |
| // 'null' -> false. |
| __ cmp(reg, factory()->null_value()); |
| __ j(equal, instr->FalseLabel(chunk_)); |
| } |
| |
| if (expected.Contains(ToBooleanStub::SMI)) { |
| // Smis: 0 -> false, all other -> true. |
| __ test(reg, Operand(reg)); |
| __ j(equal, instr->FalseLabel(chunk_)); |
| __ JumpIfSmi(reg, instr->TrueLabel(chunk_)); |
| } else if (expected.NeedsMap()) { |
| // If we need a map later and have a Smi -> deopt. |
| __ test(reg, Immediate(kSmiTagMask)); |
| DeoptimizeIf(zero, instr, "Smi"); |
| } |
| |
| Register map = no_reg; // Keep the compiler happy. |
| if (expected.NeedsMap()) { |
| map = ToRegister(instr->temp()); |
| DCHECK(!map.is(reg)); |
| __ mov(map, FieldOperand(reg, HeapObject::kMapOffset)); |
| |
| if (expected.CanBeUndetectable()) { |
| // Undetectable -> false. |
| __ test_b(FieldOperand(map, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| __ j(not_zero, instr->FalseLabel(chunk_)); |
| } |
| } |
| |
| if (expected.Contains(ToBooleanStub::SPEC_OBJECT)) { |
| // spec object -> true. |
| __ CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE); |
| __ j(above_equal, instr->TrueLabel(chunk_)); |
| } |
| |
| if (expected.Contains(ToBooleanStub::STRING)) { |
| // String value -> false iff empty. |
| Label not_string; |
| __ CmpInstanceType(map, FIRST_NONSTRING_TYPE); |
| __ j(above_equal, ¬_string, Label::kNear); |
| __ cmp(FieldOperand(reg, String::kLengthOffset), Immediate(0)); |
| __ j(not_zero, instr->TrueLabel(chunk_)); |
| __ jmp(instr->FalseLabel(chunk_)); |
| __ bind(¬_string); |
| } |
| |
| if (expected.Contains(ToBooleanStub::SYMBOL)) { |
| // Symbol value -> true. |
| __ CmpInstanceType(map, SYMBOL_TYPE); |
| __ j(equal, instr->TrueLabel(chunk_)); |
| } |
| |
| if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) { |
| // heap number -> false iff +0, -0, or NaN. |
| Label not_heap_number; |
| __ cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| __ j(not_equal, ¬_heap_number, Label::kNear); |
| __ fldz(); |
| __ fld_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| __ FCmp(); |
| __ j(zero, instr->FalseLabel(chunk_)); |
| __ jmp(instr->TrueLabel(chunk_)); |
| __ bind(¬_heap_number); |
| } |
| |
| if (!expected.IsGeneric()) { |
| // We've seen something for the first time -> deopt. |
| // This can only happen if we are not generic already. |
| DeoptimizeIf(no_condition, instr, "unexpected object"); |
| } |
| } |
| } |
| } |
| |
| |
| void LCodeGen::EmitGoto(int block) { |
| if (!IsNextEmittedBlock(block)) { |
| __ jmp(chunk_->GetAssemblyLabel(LookupDestination(block))); |
| } |
| } |
| |
| |
| void LCodeGen::DoClobberDoubles(LClobberDoubles* instr) { |
| } |
| |
| |
| void LCodeGen::DoGoto(LGoto* instr) { |
| EmitGoto(instr->block_id()); |
| } |
| |
| |
| Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) { |
| Condition cond = no_condition; |
| switch (op) { |
| case Token::EQ: |
| case Token::EQ_STRICT: |
| cond = equal; |
| break; |
| case Token::NE: |
| case Token::NE_STRICT: |
| cond = not_equal; |
| break; |
| case Token::LT: |
| cond = is_unsigned ? below : less; |
| break; |
| case Token::GT: |
| cond = is_unsigned ? above : greater; |
| break; |
| case Token::LTE: |
| cond = is_unsigned ? below_equal : less_equal; |
| break; |
| case Token::GTE: |
| cond = is_unsigned ? above_equal : greater_equal; |
| break; |
| case Token::IN: |
| case Token::INSTANCEOF: |
| default: |
| UNREACHABLE(); |
| } |
| return cond; |
| } |
| |
| |
| void LCodeGen::DoCompareNumericAndBranch(LCompareNumericAndBranch* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| bool is_unsigned = |
| instr->is_double() || |
| instr->hydrogen()->left()->CheckFlag(HInstruction::kUint32) || |
| instr->hydrogen()->right()->CheckFlag(HInstruction::kUint32); |
| Condition cc = TokenToCondition(instr->op(), is_unsigned); |
| |
| if (left->IsConstantOperand() && right->IsConstantOperand()) { |
| // We can statically evaluate the comparison. |
| double left_val = ToDouble(LConstantOperand::cast(left)); |
| double right_val = ToDouble(LConstantOperand::cast(right)); |
| int next_block = EvalComparison(instr->op(), left_val, right_val) ? |
| instr->TrueDestination(chunk_) : instr->FalseDestination(chunk_); |
| EmitGoto(next_block); |
| } else { |
| if (instr->is_double()) { |
| X87LoadForUsage(ToX87Register(right), ToX87Register(left)); |
| __ FCmp(); |
| // Don't base result on EFLAGS when a NaN is involved. Instead |
| // jump to the false block. |
| __ j(parity_even, instr->FalseLabel(chunk_)); |
| } else { |
| if (right->IsConstantOperand()) { |
| __ cmp(ToOperand(left), |
| ToImmediate(right, instr->hydrogen()->representation())); |
| } else if (left->IsConstantOperand()) { |
| __ cmp(ToOperand(right), |
| ToImmediate(left, instr->hydrogen()->representation())); |
| // We commuted the operands, so commute the condition. |
| cc = CommuteCondition(cc); |
| } else { |
| __ cmp(ToRegister(left), ToOperand(right)); |
| } |
| } |
| EmitBranch(instr, cc); |
| } |
| } |
| |
| |
| void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) { |
| Register left = ToRegister(instr->left()); |
| |
| if (instr->right()->IsConstantOperand()) { |
| Handle<Object> right = ToHandle(LConstantOperand::cast(instr->right())); |
| __ CmpObject(left, right); |
| } else { |
| Operand right = ToOperand(instr->right()); |
| __ cmp(left, right); |
| } |
| EmitBranch(instr, equal); |
| } |
| |
| |
| void LCodeGen::DoCmpHoleAndBranch(LCmpHoleAndBranch* instr) { |
| if (instr->hydrogen()->representation().IsTagged()) { |
| Register input_reg = ToRegister(instr->object()); |
| __ cmp(input_reg, factory()->the_hole_value()); |
| EmitBranch(instr, equal); |
| return; |
| } |
| |
| // Put the value to the top of stack |
| X87Register src = ToX87Register(instr->object()); |
| X87LoadForUsage(src); |
| __ fld(0); |
| __ fld(0); |
| __ FCmp(); |
| Label ok; |
| __ j(parity_even, &ok, Label::kNear); |
| __ fstp(0); |
| EmitFalseBranch(instr, no_condition); |
| __ bind(&ok); |
| |
| |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ fstp_d(MemOperand(esp, 0)); |
| |
| __ add(esp, Immediate(kDoubleSize)); |
| int offset = sizeof(kHoleNanUpper32); |
| __ cmp(MemOperand(esp, -offset), Immediate(kHoleNanUpper32)); |
| EmitBranch(instr, equal); |
| } |
| |
| |
| void LCodeGen::DoCompareMinusZeroAndBranch(LCompareMinusZeroAndBranch* instr) { |
| Representation rep = instr->hydrogen()->value()->representation(); |
| DCHECK(!rep.IsInteger32()); |
| |
| if (rep.IsDouble()) { |
| X87Register input = ToX87Register(instr->value()); |
| X87LoadForUsage(input); |
| __ FXamMinusZero(); |
| EmitBranch(instr, equal); |
| } else { |
| Register value = ToRegister(instr->value()); |
| Handle<Map> map = masm()->isolate()->factory()->heap_number_map(); |
| __ CheckMap(value, map, instr->FalseLabel(chunk()), DO_SMI_CHECK); |
| __ cmp(FieldOperand(value, HeapNumber::kExponentOffset), |
| Immediate(0x1)); |
| EmitFalseBranch(instr, no_overflow); |
| __ cmp(FieldOperand(value, HeapNumber::kMantissaOffset), |
| Immediate(0x00000000)); |
| EmitBranch(instr, equal); |
| } |
| } |
| |
| |
| Condition LCodeGen::EmitIsObject(Register input, |
| Register temp1, |
| Label* is_not_object, |
| Label* is_object) { |
| __ JumpIfSmi(input, is_not_object); |
| |
| __ cmp(input, isolate()->factory()->null_value()); |
| __ j(equal, is_object); |
| |
| __ mov(temp1, FieldOperand(input, HeapObject::kMapOffset)); |
| // Undetectable objects behave like undefined. |
| __ test_b(FieldOperand(temp1, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| __ j(not_zero, is_not_object); |
| |
| __ movzx_b(temp1, FieldOperand(temp1, Map::kInstanceTypeOffset)); |
| __ cmp(temp1, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE); |
| __ j(below, is_not_object); |
| __ cmp(temp1, LAST_NONCALLABLE_SPEC_OBJECT_TYPE); |
| return below_equal; |
| } |
| |
| |
| void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) { |
| Register reg = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| Condition true_cond = EmitIsObject( |
| reg, temp, instr->FalseLabel(chunk_), instr->TrueLabel(chunk_)); |
| |
| EmitBranch(instr, true_cond); |
| } |
| |
| |
| Condition LCodeGen::EmitIsString(Register input, |
| Register temp1, |
| Label* is_not_string, |
| SmiCheck check_needed = INLINE_SMI_CHECK) { |
| if (check_needed == INLINE_SMI_CHECK) { |
| __ JumpIfSmi(input, is_not_string); |
| } |
| |
| Condition cond = masm_->IsObjectStringType(input, temp1, temp1); |
| |
| return cond; |
| } |
| |
| |
| void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) { |
| Register reg = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| SmiCheck check_needed = |
| instr->hydrogen()->value()->type().IsHeapObject() |
| ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| |
| Condition true_cond = EmitIsString( |
| reg, temp, instr->FalseLabel(chunk_), check_needed); |
| |
| EmitBranch(instr, true_cond); |
| } |
| |
| |
| void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) { |
| Operand input = ToOperand(instr->value()); |
| |
| __ test(input, Immediate(kSmiTagMask)); |
| EmitBranch(instr, zero); |
| } |
| |
| |
| void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| __ JumpIfSmi(input, instr->FalseLabel(chunk_)); |
| } |
| __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| __ test_b(FieldOperand(temp, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| EmitBranch(instr, not_zero); |
| } |
| |
| |
| static Condition ComputeCompareCondition(Token::Value op) { |
| switch (op) { |
| case Token::EQ_STRICT: |
| case Token::EQ: |
| return equal; |
| case Token::LT: |
| return less; |
| case Token::GT: |
| return greater; |
| case Token::LTE: |
| return less_equal; |
| case Token::GTE: |
| return greater_equal; |
| default: |
| UNREACHABLE(); |
| return no_condition; |
| } |
| } |
| |
| |
| void LCodeGen::DoStringCompareAndBranch(LStringCompareAndBranch* instr) { |
| Token::Value op = instr->op(); |
| |
| Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| |
| Condition condition = ComputeCompareCondition(op); |
| __ test(eax, Operand(eax)); |
| |
| EmitBranch(instr, condition); |
| } |
| |
| |
| static InstanceType TestType(HHasInstanceTypeAndBranch* instr) { |
| InstanceType from = instr->from(); |
| InstanceType to = instr->to(); |
| if (from == FIRST_TYPE) return to; |
| DCHECK(from == to || to == LAST_TYPE); |
| return from; |
| } |
| |
| |
| static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) { |
| InstanceType from = instr->from(); |
| InstanceType to = instr->to(); |
| if (from == to) return equal; |
| if (to == LAST_TYPE) return above_equal; |
| if (from == FIRST_TYPE) return below_equal; |
| UNREACHABLE(); |
| return equal; |
| } |
| |
| |
| void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| __ JumpIfSmi(input, instr->FalseLabel(chunk_)); |
| } |
| |
| __ CmpObjectType(input, TestType(instr->hydrogen()), temp); |
| EmitBranch(instr, BranchCondition(instr->hydrogen())); |
| } |
| |
| |
| void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| |
| __ AssertString(input); |
| |
| __ mov(result, FieldOperand(input, String::kHashFieldOffset)); |
| __ IndexFromHash(result, result); |
| } |
| |
| |
| void LCodeGen::DoHasCachedArrayIndexAndBranch( |
| LHasCachedArrayIndexAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| |
| __ test(FieldOperand(input, String::kHashFieldOffset), |
| Immediate(String::kContainsCachedArrayIndexMask)); |
| EmitBranch(instr, equal); |
| } |
| |
| |
| // Branches to a label or falls through with the answer in the z flag. Trashes |
| // the temp registers, but not the input. |
| void LCodeGen::EmitClassOfTest(Label* is_true, |
| Label* is_false, |
| Handle<String>class_name, |
| Register input, |
| Register temp, |
| Register temp2) { |
| DCHECK(!input.is(temp)); |
| DCHECK(!input.is(temp2)); |
| DCHECK(!temp.is(temp2)); |
| __ JumpIfSmi(input, is_false); |
| |
| if (String::Equals(isolate()->factory()->Function_string(), class_name)) { |
| // Assuming the following assertions, we can use the same compares to test |
| // for both being a function type and being in the object type range. |
| STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
| STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| FIRST_SPEC_OBJECT_TYPE + 1); |
| STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| LAST_SPEC_OBJECT_TYPE - 1); |
| STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp); |
| __ j(below, is_false); |
| __ j(equal, is_true); |
| __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE); |
| __ j(equal, is_true); |
| } else { |
| // Faster code path to avoid two compares: subtract lower bound from the |
| // actual type and do a signed compare with the width of the type range. |
| __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| __ movzx_b(temp2, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| __ sub(Operand(temp2), Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| __ cmp(Operand(temp2), Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - |
| FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| __ j(above, is_false); |
| } |
| |
| // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
| // Check if the constructor in the map is a function. |
| __ mov(temp, FieldOperand(temp, Map::kConstructorOffset)); |
| // Objects with a non-function constructor have class 'Object'. |
| __ CmpObjectType(temp, JS_FUNCTION_TYPE, temp2); |
| if (String::Equals(class_name, isolate()->factory()->Object_string())) { |
| __ j(not_equal, is_true); |
| } else { |
| __ j(not_equal, is_false); |
| } |
| |
| // temp now contains the constructor function. Grab the |
| // instance class name from there. |
| __ mov(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
| __ mov(temp, FieldOperand(temp, |
| SharedFunctionInfo::kInstanceClassNameOffset)); |
| // The class name we are testing against is internalized since it's a literal. |
| // The name in the constructor is internalized because of the way the context |
| // is booted. This routine isn't expected to work for random API-created |
| // classes and it doesn't have to because you can't access it with natives |
| // syntax. Since both sides are internalized it is sufficient to use an |
| // identity comparison. |
| __ cmp(temp, class_name); |
| // End with the answer in the z flag. |
| } |
| |
| |
| void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| Register temp2 = ToRegister(instr->temp2()); |
| |
| Handle<String> class_name = instr->hydrogen()->class_name(); |
| |
| EmitClassOfTest(instr->TrueLabel(chunk_), instr->FalseLabel(chunk_), |
| class_name, input, temp, temp2); |
| |
| EmitBranch(instr, equal); |
| } |
| |
| |
| void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) { |
| Register reg = ToRegister(instr->value()); |
| __ cmp(FieldOperand(reg, HeapObject::kMapOffset), instr->map()); |
| EmitBranch(instr, equal); |
| } |
| |
| |
| void LCodeGen::DoInstanceOf(LInstanceOf* instr) { |
| // Object and function are in fixed registers defined by the stub. |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| InstanceofStub stub(isolate(), InstanceofStub::kArgsInRegisters); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| |
| Label true_value, done; |
| __ test(eax, Operand(eax)); |
| __ j(zero, &true_value, Label::kNear); |
| __ mov(ToRegister(instr->result()), factory()->false_value()); |
| __ jmp(&done, Label::kNear); |
| __ bind(&true_value); |
| __ mov(ToRegister(instr->result()), factory()->true_value()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) { |
| class DeferredInstanceOfKnownGlobal FINAL : public LDeferredCode { |
| public: |
| DeferredInstanceOfKnownGlobal(LCodeGen* codegen, |
| LInstanceOfKnownGlobal* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredInstanceOfKnownGlobal(instr_, &map_check_); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| Label* map_check() { return &map_check_; } |
| private: |
| LInstanceOfKnownGlobal* instr_; |
| Label map_check_; |
| }; |
| |
| DeferredInstanceOfKnownGlobal* deferred; |
| deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr, x87_stack_); |
| |
| Label done, false_result; |
| Register object = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| // A Smi is not an instance of anything. |
| __ JumpIfSmi(object, &false_result, Label::kNear); |
| |
| // This is the inlined call site instanceof cache. The two occurences of the |
| // hole value will be patched to the last map/result pair generated by the |
| // instanceof stub. |
| Label cache_miss; |
| Register map = ToRegister(instr->temp()); |
| __ mov(map, FieldOperand(object, HeapObject::kMapOffset)); |
| __ bind(deferred->map_check()); // Label for calculating code patching. |
| Handle<Cell> cache_cell = factory()->NewCell(factory()->the_hole_value()); |
| __ cmp(map, Operand::ForCell(cache_cell)); // Patched to cached map. |
| __ j(not_equal, &cache_miss, Label::kNear); |
| __ mov(eax, factory()->the_hole_value()); // Patched to either true or false. |
| __ jmp(&done, Label::kNear); |
| |
| // The inlined call site cache did not match. Check for null and string |
| // before calling the deferred code. |
| __ bind(&cache_miss); |
| // Null is not an instance of anything. |
| __ cmp(object, factory()->null_value()); |
| __ j(equal, &false_result, Label::kNear); |
| |
| // String values are not instances of anything. |
| Condition is_string = masm_->IsObjectStringType(object, temp, temp); |
| __ j(is_string, &false_result, Label::kNear); |
| |
| // Go to the deferred code. |
| __ jmp(deferred->entry()); |
| |
| __ bind(&false_result); |
| __ mov(ToRegister(instr->result()), factory()->false_value()); |
| |
| // Here result has either true or false. Deferred code also produces true or |
| // false object. |
| __ bind(deferred->exit()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr, |
| Label* map_check) { |
| PushSafepointRegistersScope scope(this); |
| |
| InstanceofStub::Flags flags = InstanceofStub::kNoFlags; |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kArgsInRegisters); |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kCallSiteInlineCheck); |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kReturnTrueFalseObject); |
| InstanceofStub stub(isolate(), flags); |
| |
| // Get the temp register reserved by the instruction. This needs to be a |
| // register which is pushed last by PushSafepointRegisters as top of the |
| // stack is used to pass the offset to the location of the map check to |
| // the stub. |
| Register temp = ToRegister(instr->temp()); |
| DCHECK(MacroAssembler::SafepointRegisterStackIndex(temp) == 0); |
| __ LoadHeapObject(InstanceofStub::right(), instr->function()); |
| static const int kAdditionalDelta = 13; |
| int delta = masm_->SizeOfCodeGeneratedSince(map_check) + kAdditionalDelta; |
| __ mov(temp, Immediate(delta)); |
| __ StoreToSafepointRegisterSlot(temp, temp); |
| CallCodeGeneric(stub.GetCode(), |
| RelocInfo::CODE_TARGET, |
| instr, |
| RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| // Get the deoptimization index of the LLazyBailout-environment that |
| // corresponds to this instruction. |
| LEnvironment* env = instr->GetDeferredLazyDeoptimizationEnvironment(); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| |
| // Put the result value into the eax slot and restore all registers. |
| __ StoreToSafepointRegisterSlot(eax, eax); |
| } |
| |
| |
| void LCodeGen::DoCmpT(LCmpT* instr) { |
| Token::Value op = instr->op(); |
| |
| Handle<Code> ic = CodeFactory::CompareIC(isolate(), op).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| |
| Condition condition = ComputeCompareCondition(op); |
| Label true_value, done; |
| __ test(eax, Operand(eax)); |
| __ j(condition, &true_value, Label::kNear); |
| __ mov(ToRegister(instr->result()), factory()->false_value()); |
| __ jmp(&done, Label::kNear); |
| __ bind(&true_value); |
| __ mov(ToRegister(instr->result()), factory()->true_value()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::EmitReturn(LReturn* instr, bool dynamic_frame_alignment) { |
| int extra_value_count = dynamic_frame_alignment ? 2 : 1; |
| |
| if (instr->has_constant_parameter_count()) { |
| int parameter_count = ToInteger32(instr->constant_parameter_count()); |
| if (dynamic_frame_alignment && FLAG_debug_code) { |
| __ cmp(Operand(esp, |
| (parameter_count + extra_value_count) * kPointerSize), |
| Immediate(kAlignmentZapValue)); |
| __ Assert(equal, kExpectedAlignmentMarker); |
| } |
| __ Ret((parameter_count + extra_value_count) * kPointerSize, ecx); |
| } else { |
| DCHECK(info()->IsStub()); // Functions would need to drop one more value. |
| Register reg = ToRegister(instr->parameter_count()); |
| // The argument count parameter is a smi |
| __ SmiUntag(reg); |
| Register return_addr_reg = reg.is(ecx) ? ebx : ecx; |
| if (dynamic_frame_alignment && FLAG_debug_code) { |
| DCHECK(extra_value_count == 2); |
| __ cmp(Operand(esp, reg, times_pointer_size, |
| extra_value_count * kPointerSize), |
| Immediate(kAlignmentZapValue)); |
| __ Assert(equal, kExpectedAlignmentMarker); |
| } |
| |
| // emit code to restore stack based on instr->parameter_count() |
| __ pop(return_addr_reg); // save return address |
| if (dynamic_frame_alignment) { |
| __ inc(reg); // 1 more for alignment |
| } |
| __ shl(reg, kPointerSizeLog2); |
| __ add(esp, reg); |
| __ jmp(return_addr_reg); |
| } |
| } |
| |
| |
| void LCodeGen::DoReturn(LReturn* instr) { |
| if (FLAG_trace && info()->IsOptimizing()) { |
| // Preserve the return value on the stack and rely on the runtime call |
| // to return the value in the same register. We're leaving the code |
| // managed by the register allocator and tearing down the frame, it's |
| // safe to write to the context register. |
| __ push(eax); |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntime(Runtime::kTraceExit, 1); |
| } |
| if (dynamic_frame_alignment_) { |
| // Fetch the state of the dynamic frame alignment. |
| __ mov(edx, Operand(ebp, |
| JavaScriptFrameConstants::kDynamicAlignmentStateOffset)); |
| } |
| int no_frame_start = -1; |
| if (NeedsEagerFrame()) { |
| __ mov(esp, ebp); |
| __ pop(ebp); |
| no_frame_start = masm_->pc_offset(); |
| } |
| if (dynamic_frame_alignment_) { |
| Label no_padding; |
| __ cmp(edx, Immediate(kNoAlignmentPadding)); |
| __ j(equal, &no_padding, Label::kNear); |
| |
| EmitReturn(instr, true); |
| __ bind(&no_padding); |
| } |
| |
| EmitReturn(instr, false); |
| if (no_frame_start != -1) { |
| info()->AddNoFrameRange(no_frame_start, masm_->pc_offset()); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) { |
| Register result = ToRegister(instr->result()); |
| __ mov(result, Operand::ForCell(instr->hydrogen()->cell().handle())); |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ cmp(result, factory()->the_hole_value()); |
| DeoptimizeIf(equal, instr, "hole"); |
| } |
| } |
| |
| |
| template <class T> |
| void LCodeGen::EmitVectorLoadICRegisters(T* instr) { |
| DCHECK(FLAG_vector_ics); |
| Register vector_register = ToRegister(instr->temp_vector()); |
| Register slot_register = VectorLoadICDescriptor::SlotRegister(); |
| DCHECK(vector_register.is(VectorLoadICDescriptor::VectorRegister())); |
| DCHECK(slot_register.is(eax)); |
| |
| AllowDeferredHandleDereference vector_structure_check; |
| Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector(); |
| __ mov(vector_register, vector); |
| // No need to allocate this register. |
| FeedbackVectorICSlot slot = instr->hydrogen()->slot(); |
| int index = vector->GetIndex(slot); |
| __ mov(slot_register, Immediate(Smi::FromInt(index))); |
| } |
| |
| |
| void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->global_object()) |
| .is(LoadDescriptor::ReceiverRegister())); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| __ mov(LoadDescriptor::NameRegister(), instr->name()); |
| if (FLAG_vector_ics) { |
| EmitVectorLoadICRegisters<LLoadGlobalGeneric>(instr); |
| } |
| ContextualMode mode = instr->for_typeof() ? NOT_CONTEXTUAL : CONTEXTUAL; |
| Handle<Code> ic = CodeFactory::LoadICInOptimizedCode(isolate(), mode).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) { |
| Register value = ToRegister(instr->value()); |
| Handle<PropertyCell> cell_handle = instr->hydrogen()->cell().handle(); |
| |
| // If the cell we are storing to contains the hole it could have |
| // been deleted from the property dictionary. In that case, we need |
| // to update the property details in the property dictionary to mark |
| // it as no longer deleted. We deoptimize in that case. |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ cmp(Operand::ForCell(cell_handle), factory()->the_hole_value()); |
| DeoptimizeIf(equal, instr, "hole"); |
| } |
| |
| // Store the value. |
| __ mov(Operand::ForCell(cell_handle), value); |
| // Cells are always rescanned, so no write barrier here. |
| } |
| |
| |
| void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ mov(result, ContextOperand(context, instr->slot_index())); |
| |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ cmp(result, factory()->the_hole_value()); |
| if (instr->hydrogen()->DeoptimizesOnHole()) { |
| DeoptimizeIf(equal, instr, "hole"); |
| } else { |
| Label is_not_hole; |
| __ j(not_equal, &is_not_hole, Label::kNear); |
| __ mov(result, factory()->undefined_value()); |
| __ bind(&is_not_hole); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register value = ToRegister(instr->value()); |
| |
| Label skip_assignment; |
| |
| Operand target = ContextOperand(context, instr->slot_index()); |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ cmp(target, factory()->the_hole_value()); |
| if (instr->hydrogen()->DeoptimizesOnHole()) { |
| DeoptimizeIf(equal, instr, "hole"); |
| } else { |
| __ j(not_equal, &skip_assignment, Label::kNear); |
| } |
| } |
| |
| __ mov(target, value); |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| SmiCheck check_needed = |
| instr->hydrogen()->value()->type().IsHeapObject() |
| ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| Register temp = ToRegister(instr->temp()); |
| int offset = Context::SlotOffset(instr->slot_index()); |
| __ RecordWriteContextSlot(context, offset, value, temp, kSaveFPRegs, |
| EMIT_REMEMBERED_SET, check_needed); |
| } |
| |
| __ bind(&skip_assignment); |
| } |
| |
| |
| void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) { |
| HObjectAccess access = instr->hydrogen()->access(); |
| int offset = access.offset(); |
| |
| if (access.IsExternalMemory()) { |
| Register result = ToRegister(instr->result()); |
| MemOperand operand = instr->object()->IsConstantOperand() |
| ? MemOperand::StaticVariable(ToExternalReference( |
| LConstantOperand::cast(instr->object()))) |
| : MemOperand(ToRegister(instr->object()), offset); |
| __ Load(result, operand, access.representation()); |
| return; |
| } |
| |
| Register object = ToRegister(instr->object()); |
| if (instr->hydrogen()->representation().IsDouble()) { |
| X87Mov(ToX87Register(instr->result()), FieldOperand(object, offset)); |
| return; |
| } |
| |
| Register result = ToRegister(instr->result()); |
| if (!access.IsInobject()) { |
| __ mov(result, FieldOperand(object, JSObject::kPropertiesOffset)); |
| object = result; |
| } |
| __ Load(result, FieldOperand(object, offset), access.representation()); |
| } |
| |
| |
| void LCodeGen::EmitPushTaggedOperand(LOperand* operand) { |
| DCHECK(!operand->IsDoubleRegister()); |
| if (operand->IsConstantOperand()) { |
| Handle<Object> object = ToHandle(LConstantOperand::cast(operand)); |
| AllowDeferredHandleDereference smi_check; |
| if (object->IsSmi()) { |
| __ Push(Handle<Smi>::cast(object)); |
| } else { |
| __ PushHeapObject(Handle<HeapObject>::cast(object)); |
| } |
| } else if (operand->IsRegister()) { |
| __ push(ToRegister(operand)); |
| } else { |
| __ push(ToOperand(operand)); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister())); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| __ mov(LoadDescriptor::NameRegister(), instr->name()); |
| if (FLAG_vector_ics) { |
| EmitVectorLoadICRegisters<LLoadNamedGeneric>(instr); |
| } |
| Handle<Code> ic = |
| CodeFactory::LoadICInOptimizedCode(isolate(), NOT_CONTEXTUAL).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) { |
| Register function = ToRegister(instr->function()); |
| Register temp = ToRegister(instr->temp()); |
| Register result = ToRegister(instr->result()); |
| |
| // Get the prototype or initial map from the function. |
| __ mov(result, |
| FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // Check that the function has a prototype or an initial map. |
| __ cmp(Operand(result), Immediate(factory()->the_hole_value())); |
| DeoptimizeIf(equal, instr, "hole"); |
| |
| // If the function does not have an initial map, we're done. |
| Label done; |
| __ CmpObjectType(result, MAP_TYPE, temp); |
| __ j(not_equal, &done, Label::kNear); |
| |
| // Get the prototype from the initial map. |
| __ mov(result, FieldOperand(result, Map::kPrototypeOffset)); |
| |
| // All done. |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoLoadRoot(LLoadRoot* instr) { |
| Register result = ToRegister(instr->result()); |
| __ LoadRoot(result, instr->index()); |
| } |
| |
| |
| void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
| Register arguments = ToRegister(instr->arguments()); |
| Register result = ToRegister(instr->result()); |
| if (instr->length()->IsConstantOperand() && |
| instr->index()->IsConstantOperand()) { |
| int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| int const_length = ToInteger32(LConstantOperand::cast(instr->length())); |
| int index = (const_length - const_index) + 1; |
| __ mov(result, Operand(arguments, index * kPointerSize)); |
| } else { |
| Register length = ToRegister(instr->length()); |
| Operand index = ToOperand(instr->index()); |
| // There are two words between the frame pointer and the last argument. |
| // Subtracting from length accounts for one of them add one more. |
| __ sub(length, index); |
| __ mov(result, Operand(arguments, length, times_4, kPointerSize)); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { |
| ElementsKind elements_kind = instr->elements_kind(); |
| LOperand* key = instr->key(); |
| if (!key->IsConstantOperand() && |
| ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(), |
| elements_kind)) { |
| __ SmiUntag(ToRegister(key)); |
| } |
| Operand operand(BuildFastArrayOperand( |
| instr->elements(), |
| key, |
| instr->hydrogen()->key()->representation(), |
| elements_kind, |
| instr->base_offset())); |
| if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS || |
| elements_kind == FLOAT32_ELEMENTS) { |
| X87Mov(ToX87Register(instr->result()), operand, kX87FloatOperand); |
| } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS || |
| elements_kind == FLOAT64_ELEMENTS) { |
| X87Mov(ToX87Register(instr->result()), operand); |
| } else { |
| Register result(ToRegister(instr->result())); |
| switch (elements_kind) { |
| case EXTERNAL_INT8_ELEMENTS: |
| case INT8_ELEMENTS: |
| __ movsx_b(result, operand); |
| break; |
| case EXTERNAL_UINT8_CLAMPED_ELEMENTS: |
| case EXTERNAL_UINT8_ELEMENTS: |
| case UINT8_ELEMENTS: |
| case UINT8_CLAMPED_ELEMENTS: |
| __ movzx_b(result, operand); |
| break; |
| case EXTERNAL_INT16_ELEMENTS: |
| case INT16_ELEMENTS: |
| __ movsx_w(result, operand); |
| break; |
| case EXTERNAL_UINT16_ELEMENTS: |
| case UINT16_ELEMENTS: |
| __ movzx_w(result, operand); |
| break; |
| case EXTERNAL_INT32_ELEMENTS: |
| case INT32_ELEMENTS: |
| __ mov(result, operand); |
| break; |
| case EXTERNAL_UINT32_ELEMENTS: |
| case UINT32_ELEMENTS: |
| __ mov(result, operand); |
| if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) { |
| __ test(result, Operand(result)); |
| DeoptimizeIf(negative, instr, "negative value"); |
| } |
| break; |
| case EXTERNAL_FLOAT32_ELEMENTS: |
| case EXTERNAL_FLOAT64_ELEMENTS: |
| case FLOAT32_ELEMENTS: |
| case FLOAT64_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case SLOPPY_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) { |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| Operand hole_check_operand = BuildFastArrayOperand( |
| instr->elements(), instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_DOUBLE_ELEMENTS, |
| instr->base_offset() + sizeof(kHoleNanLower32)); |
| __ cmp(hole_check_operand, Immediate(kHoleNanUpper32)); |
| DeoptimizeIf(equal, instr, "hole"); |
| } |
| |
| Operand double_load_operand = BuildFastArrayOperand( |
| instr->elements(), |
| instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_DOUBLE_ELEMENTS, |
| instr->base_offset()); |
| X87Mov(ToX87Register(instr->result()), double_load_operand); |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) { |
| Register result = ToRegister(instr->result()); |
| |
| // Load the result. |
| __ mov(result, |
| BuildFastArrayOperand(instr->elements(), instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_ELEMENTS, instr->base_offset())); |
| |
| // Check for the hole value. |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) { |
| __ test(result, Immediate(kSmiTagMask)); |
| DeoptimizeIf(not_equal, instr, "not a Smi"); |
| } else { |
| __ cmp(result, factory()->the_hole_value()); |
| DeoptimizeIf(equal, instr, "hole"); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) { |
| if (instr->is_typed_elements()) { |
| DoLoadKeyedExternalArray(instr); |
| } else if (instr->hydrogen()->representation().IsDouble()) { |
| DoLoadKeyedFixedDoubleArray(instr); |
| } else { |
| DoLoadKeyedFixedArray(instr); |
| } |
| } |
| |
| |
| Operand LCodeGen::BuildFastArrayOperand( |
| LOperand* elements_pointer, |
| LOperand* key, |
| Representation key_representation, |
| ElementsKind elements_kind, |
| uint32_t base_offset) { |
| Register elements_pointer_reg = ToRegister(elements_pointer); |
| int element_shift_size = ElementsKindToShiftSize(elements_kind); |
| int shift_size = element_shift_size; |
| if (key->IsConstantOperand()) { |
| int constant_value = ToInteger32(LConstantOperand::cast(key)); |
| if (constant_value & 0xF0000000) { |
| Abort(kArrayIndexConstantValueTooBig); |
| } |
| return Operand(elements_pointer_reg, |
| ((constant_value) << shift_size) |
| + base_offset); |
| } else { |
| // Take the tag bit into account while computing the shift size. |
| if (key_representation.IsSmi() && (shift_size >= 1)) { |
| shift_size -= kSmiTagSize; |
| } |
| ScaleFactor scale_factor = static_cast<ScaleFactor>(shift_size); |
| return Operand(elements_pointer_reg, |
| ToRegister(key), |
| scale_factor, |
| base_offset); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister())); |
| DCHECK(ToRegister(instr->key()).is(LoadDescriptor::NameRegister())); |
| |
| if (FLAG_vector_ics) { |
| EmitVectorLoadICRegisters<LLoadKeyedGeneric>(instr); |
| } |
| |
| Handle<Code> ic = CodeFactory::KeyedLoadICInOptimizedCode(isolate()).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) { |
| Register result = ToRegister(instr->result()); |
| |
| if (instr->hydrogen()->from_inlined()) { |
| __ lea(result, Operand(esp, -2 * kPointerSize)); |
| } else { |
| // Check for arguments adapter frame. |
| Label done, adapted; |
| __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| __ mov(result, Operand(result, StandardFrameConstants::kContextOffset)); |
| __ cmp(Operand(result), |
| Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ j(equal, &adapted, Label::kNear); |
| |
| // No arguments adaptor frame. |
| __ mov(result, Operand(ebp)); |
| __ jmp(&done, Label::kNear); |
| |
| // Arguments adaptor frame present. |
| __ bind(&adapted); |
| __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Result is the frame pointer for the frame if not adapted and for the real |
| // frame below the adaptor frame if adapted. |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) { |
| Operand elem = ToOperand(instr->elements()); |
| Register result = ToRegister(instr->result()); |
| |
| Label done; |
| |
| // If no arguments adaptor frame the number of arguments is fixed. |
| __ cmp(ebp, elem); |
| __ mov(result, Immediate(scope()->num_parameters())); |
| __ j(equal, &done, Label::kNear); |
| |
| // Arguments adaptor frame present. Get argument length from there. |
| __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| __ mov(result, Operand(result, |
| ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(result); |
| |
| // Argument length is in result register. |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) { |
| Register receiver = ToRegister(instr->receiver()); |
| Register function = ToRegister(instr->function()); |
| |
| // If the receiver is null or undefined, we have to pass the global |
| // object as a receiver to normal functions. Values have to be |
| // passed unchanged to builtins and strict-mode functions. |
| Label receiver_ok, global_object; |
| Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear; |
| Register scratch = ToRegister(instr->temp()); |
| |
| if (!instr->hydrogen()->known_function()) { |
| // Do not transform the receiver to object for strict mode |
| // functions. |
| __ mov(scratch, |
| FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| __ test_b(FieldOperand(scratch, SharedFunctionInfo::kStrictModeByteOffset), |
| 1 << SharedFunctionInfo::kStrictModeBitWithinByte); |
| __ j(not_equal, &receiver_ok, dist); |
| |
| // Do not transform the receiver to object for builtins. |
| __ test_b(FieldOperand(scratch, SharedFunctionInfo::kNativeByteOffset), |
| 1 << SharedFunctionInfo::kNativeBitWithinByte); |
| __ j(not_equal, &receiver_ok, dist); |
| } |
| |
| // Normal function. Replace undefined or null with global receiver. |
| __ cmp(receiver, factory()->null_value()); |
| __ j(equal, &global_object, Label::kNear); |
| __ cmp(receiver, factory()->undefined_value()); |
| __ j(equal, &global_object, Label::kNear); |
| |
| // The receiver should be a JS object. |
| __ test(receiver, Immediate(kSmiTagMask)); |
| DeoptimizeIf(equal, instr, "Smi"); |
| __ CmpObjectType(receiver, FIRST_SPEC_OBJECT_TYPE, scratch); |
| DeoptimizeIf(below, instr, "not a JavaScript object"); |
| |
| __ jmp(&receiver_ok, Label::kNear); |
| __ bind(&global_object); |
| __ mov(receiver, FieldOperand(function, JSFunction::kContextOffset)); |
| const int global_offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX); |
| __ mov(receiver, Operand(receiver, global_offset)); |
| const int proxy_offset = GlobalObject::kGlobalProxyOffset; |
| __ mov(receiver, FieldOperand(receiver, proxy_offset)); |
| __ bind(&receiver_ok); |
| } |
| |
| |
| void LCodeGen::DoApplyArguments(LApplyArguments* instr) { |
| Register receiver = ToRegister(instr->receiver()); |
| Register function = ToRegister(instr->function()); |
| Register length = ToRegister(instr->length()); |
| Register elements = ToRegister(instr->elements()); |
| DCHECK(receiver.is(eax)); // Used for parameter count. |
| DCHECK(function.is(edi)); // Required by InvokeFunction. |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| // Copy the arguments to this function possibly from the |
| // adaptor frame below it. |
| const uint32_t kArgumentsLimit = 1 * KB; |
| __ cmp(length, kArgumentsLimit); |
| DeoptimizeIf(above, instr, "too many arguments"); |
| |
| __ push(receiver); |
| __ mov(receiver, length); |
| |
| // Loop through the arguments pushing them onto the execution |
| // stack. |
| Label invoke, loop; |
| // length is a small non-negative integer, due to the test above. |
| __ test(length, Operand(length)); |
| __ j(zero, &invoke, Label::kNear); |
| __ bind(&loop); |
| __ push(Operand(elements, length, times_pointer_size, 1 * kPointerSize)); |
| __ dec(length); |
| __ j(not_zero, &loop); |
| |
| // Invoke the function. |
| __ bind(&invoke); |
| DCHECK(instr->HasPointerMap()); |
| LPointerMap* pointers = instr->pointer_map(); |
| SafepointGenerator safepoint_generator( |
| this, pointers, Safepoint::kLazyDeopt); |
| ParameterCount actual(eax); |
| __ InvokeFunction(function, actual, CALL_FUNCTION, safepoint_generator); |
| } |
| |
| |
| void LCodeGen::DoDebugBreak(LDebugBreak* instr) { |
| __ int3(); |
| } |
| |
| |
| void LCodeGen::DoPushArgument(LPushArgument* instr) { |
| LOperand* argument = instr->value(); |
| EmitPushTaggedOperand(argument); |
| } |
| |
| |
| void LCodeGen::DoDrop(LDrop* instr) { |
| __ Drop(instr->count()); |
| } |
| |
| |
| void LCodeGen::DoThisFunction(LThisFunction* instr) { |
| Register result = ToRegister(instr->result()); |
| __ mov(result, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| |
| void LCodeGen::DoContext(LContext* instr) { |
| Register result = ToRegister(instr->result()); |
| if (info()->IsOptimizing()) { |
| __ mov(result, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| } else { |
| // If there is no frame, the context must be in esi. |
| DCHECK(result.is(esi)); |
| } |
| } |
| |
| |
| void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| __ push(esi); // The context is the first argument. |
| __ push(Immediate(instr->hydrogen()->pairs())); |
| __ push(Immediate(Smi::FromInt(instr->hydrogen()->flags()))); |
| CallRuntime(Runtime::kDeclareGlobals, 3, instr); |
| } |
| |
| |
| void LCodeGen::CallKnownFunction(Handle<JSFunction> function, |
| int formal_parameter_count, |
| int arity, |
| LInstruction* instr, |
| EDIState edi_state) { |
| bool dont_adapt_arguments = |
| formal_parameter_count == SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| bool can_invoke_directly = |
| dont_adapt_arguments || formal_parameter_count == arity; |
| |
| if (can_invoke_directly) { |
| if (edi_state == EDI_UNINITIALIZED) { |
| __ LoadHeapObject(edi, function); |
| } |
| |
| // Change context. |
| __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| |
| // Set eax to arguments count if adaption is not needed. Assumes that eax |
| // is available to write to at this point. |
| if (dont_adapt_arguments) { |
| __ mov(eax, arity); |
| } |
| |
| // Invoke function directly. |
| if (function.is_identical_to(info()->closure())) { |
| __ CallSelf(); |
| } else { |
| __ call(FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| } |
| RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| } else { |
| // We need to adapt arguments. |
| LPointerMap* pointers = instr->pointer_map(); |
| SafepointGenerator generator( |
| this, pointers, Safepoint::kLazyDeopt); |
| ParameterCount count(arity); |
| ParameterCount expected(formal_parameter_count); |
| __ InvokeFunction(function, expected, count, CALL_FUNCTION, generator); |
| } |
| } |
| |
| |
| void LCodeGen::DoTailCallThroughMegamorphicCache( |
| LTailCallThroughMegamorphicCache* instr) { |
| Register receiver = ToRegister(instr->receiver()); |
| Register name = ToRegister(instr->name()); |
| DCHECK(receiver.is(LoadDescriptor::ReceiverRegister())); |
| DCHECK(name.is(LoadDescriptor::NameRegister())); |
| Register slot = FLAG_vector_ics ? ToRegister(instr->slot()) : no_reg; |
| Register vector = FLAG_vector_ics ? ToRegister(instr->vector()) : no_reg; |
| |
| Register scratch = ebx; |
| Register extra = edi; |
| DCHECK(!extra.is(slot) && !extra.is(vector)); |
| DCHECK(!scratch.is(receiver) && !scratch.is(name)); |
| DCHECK(!extra.is(receiver) && !extra.is(name)); |
| |
| // Important for the tail-call. |
| bool must_teardown_frame = NeedsEagerFrame(); |
| |
| if (!instr->hydrogen()->is_just_miss()) { |
| if (FLAG_vector_ics) { |
| __ push(slot); |
| __ push(vector); |
| } |
| |
| // The probe will tail call to a handler if found. |
| // If --vector-ics is on, then it knows to pop the two args first. |
| DCHECK(!instr->hydrogen()->is_keyed_load()); |
| isolate()->stub_cache()->GenerateProbe( |
| masm(), Code::LOAD_IC, instr->hydrogen()->flags(), must_teardown_frame, |
| receiver, name, scratch, extra); |
| |
| if (FLAG_vector_ics) { |
| __ pop(vector); |
| __ pop(slot); |
| } |
| } |
| |
| // Tail call to miss if we ended up here. |
| if (must_teardown_frame) __ leave(); |
| if (instr->hydrogen()->is_keyed_load()) { |
| KeyedLoadIC::GenerateMiss(masm()); |
| } else { |
| LoadIC::GenerateMiss(masm()); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) { |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| if (instr->hydrogen()->IsTailCall()) { |
| if (NeedsEagerFrame()) __ leave(); |
| |
| if (instr->target()->IsConstantOperand()) { |
| LConstantOperand* target = LConstantOperand::cast(instr->target()); |
| Handle<Code> code = Handle<Code>::cast(ToHandle(target)); |
| __ jmp(code, RelocInfo::CODE_TARGET); |
| } else { |
| DCHECK(instr->target()->IsRegister()); |
| Register target = ToRegister(instr->target()); |
| __ add(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ jmp(target); |
| } |
| } else { |
| LPointerMap* pointers = instr->pointer_map(); |
| SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt); |
| |
| if (instr->target()->IsConstantOperand()) { |
| LConstantOperand* target = LConstantOperand::cast(instr->target()); |
| Handle<Code> code = Handle<Code>::cast(ToHandle(target)); |
| generator.BeforeCall(__ CallSize(code, RelocInfo::CODE_TARGET)); |
| __ call(code, RelocInfo::CODE_TARGET); |
| } else { |
| DCHECK(instr->target()->IsRegister()); |
| Register target = ToRegister(instr->target()); |
| generator.BeforeCall(__ CallSize(Operand(target))); |
| __ add(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ call(target); |
| } |
| generator.AfterCall(); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) { |
| DCHECK(ToRegister(instr->function()).is(edi)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| if (instr->hydrogen()->pass_argument_count()) { |
| __ mov(eax, instr->arity()); |
| } |
| |
| // Change context. |
| __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| |
| bool is_self_call = false; |
| if (instr->hydrogen()->function()->IsConstant()) { |
| HConstant* fun_const = HConstant::cast(instr->hydrogen()->function()); |
| Handle<JSFunction> jsfun = |
| Handle<JSFunction>::cast(fun_const->handle(isolate())); |
| is_self_call = jsfun.is_identical_to(info()->closure()); |
| } |
| |
| if (is_self_call) { |
| __ CallSelf(); |
| } else { |
| __ call(FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| } |
| |
| RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| } |
| |
| |
| void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { |
| Register input_reg = ToRegister(instr->value()); |
| __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| DeoptimizeIf(not_equal, instr, "not a heap number"); |
| |
| Label slow, allocated, done; |
| Register tmp = input_reg.is(eax) ? ecx : eax; |
| Register tmp2 = tmp.is(ecx) ? edx : input_reg.is(ecx) ? edx : ecx; |
| |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| __ mov(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| // Check the sign of the argument. If the argument is positive, just |
| // return it. We do not need to patch the stack since |input| and |
| // |result| are the same register and |input| will be restored |
| // unchanged by popping safepoint registers. |
| __ test(tmp, Immediate(HeapNumber::kSignMask)); |
| __ j(zero, &done, Label::kNear); |
| |
| __ AllocateHeapNumber(tmp, tmp2, no_reg, &slow); |
| __ jmp(&allocated, Label::kNear); |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, |
| instr, instr->context()); |
| // Set the pointer to the new heap number in tmp. |
| if (!tmp.is(eax)) __ mov(tmp, eax); |
| // Restore input_reg after call to runtime. |
| __ LoadFromSafepointRegisterSlot(input_reg, input_reg); |
| |
| __ bind(&allocated); |
| __ mov(tmp2, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| __ and_(tmp2, ~HeapNumber::kSignMask); |
| __ mov(FieldOperand(tmp, HeapNumber::kExponentOffset), tmp2); |
| __ mov(tmp2, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| __ mov(FieldOperand(tmp, HeapNumber::kMantissaOffset), tmp2); |
| __ StoreToSafepointRegisterSlot(input_reg, tmp); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) { |
| Register input_reg = ToRegister(instr->value()); |
| __ test(input_reg, Operand(input_reg)); |
| Label is_positive; |
| __ j(not_sign, &is_positive, Label::kNear); |
| __ neg(input_reg); // Sets flags. |
| DeoptimizeIf(negative, instr, "overflow"); |
| __ bind(&is_positive); |
| } |
| |
| |
| void LCodeGen::DoMathAbs(LMathAbs* instr) { |
| // Class for deferred case. |
| class DeferredMathAbsTaggedHeapNumber FINAL : public LDeferredCode { |
| public: |
| DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen, |
| LMathAbs* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LMathAbs* instr_; |
| }; |
| |
| DCHECK(instr->value()->Equals(instr->result())); |
| Representation r = instr->hydrogen()->value()->representation(); |
| |
| if (r.IsDouble()) { |
| X87Register value = ToX87Register(instr->value()); |
| X87Fxch(value); |
| __ fabs(); |
| } else if (r.IsSmiOrInteger32()) { |
| EmitIntegerMathAbs(instr); |
| } else { // Tagged case. |
| DeferredMathAbsTaggedHeapNumber* deferred = |
| new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr, x87_stack_); |
| Register input_reg = ToRegister(instr->value()); |
| // Smi check. |
| __ JumpIfNotSmi(input_reg, deferred->entry()); |
| EmitIntegerMathAbs(instr); |
| __ bind(deferred->exit()); |
| } |
| } |
| |
| |
| void LCodeGen::DoMathFloor(LMathFloor* instr) { |
| Register output_reg = ToRegister(instr->result()); |
| X87Register input_reg = ToX87Register(instr->value()); |
| X87Fxch(input_reg); |
| |
| Label not_minus_zero, done; |
| // Deoptimize on unordered. |
| __ fldz(); |
| __ fld(1); |
| __ FCmp(); |
| DeoptimizeIf(parity_even, instr, "NaN"); |
| __ j(below, ¬_minus_zero, Label::kNear); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| // Check for negative zero. |
| __ j(not_equal, ¬_minus_zero, Label::kNear); |
| // +- 0.0. |
| __ fld(0); |
| __ FXamSign(); |
| DeoptimizeIf(not_zero, instr, "minus zero"); |
| __ Move(output_reg, Immediate(0)); |
| __ jmp(&done, Label::kFar); |
| } |
| |
| // Positive input. |
| // rc=01B, round down. |
| __ bind(¬_minus_zero); |
| __ fnclex(); |
| __ X87SetRC(0x0400); |
| __ sub(esp, Immediate(kPointerSize)); |
| __ fist_s(Operand(esp, 0)); |
| __ pop(output_reg); |
| __ X87CheckIA(); |
| DeoptimizeIf(equal, instr, "overflow"); |
| __ fnclex(); |
| __ X87SetRC(0x0000); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathRound(LMathRound* instr) { |
| X87Register input_reg = ToX87Register(instr->value()); |
| Register result = ToRegister(instr->result()); |
| X87Fxch(input_reg); |
| Label below_one_half, below_minus_one_half, done; |
| |
| ExternalReference one_half = ExternalReference::address_of_one_half(); |
| ExternalReference minus_one_half = |
| ExternalReference::address_of_minus_one_half(); |
| |
| __ fld_d(Operand::StaticVariable(one_half)); |
| __ fld(1); |
| __ FCmp(); |
| __ j(carry, &below_one_half); |
| |
| // Use rounds towards zero, since 0.5 <= x, we use floor(0.5 + x) |
| __ fld(0); |
| __ fadd_d(Operand::StaticVariable(one_half)); |
| // rc=11B, round toward zero. |
| __ X87SetRC(0x0c00); |
| __ sub(esp, Immediate(kPointerSize)); |
| // Clear exception bits. |
| __ fnclex(); |
| __ fistp_s(MemOperand(esp, 0)); |
| // Check overflow. |
| __ X87CheckIA(); |
| __ pop(result); |
| DeoptimizeIf(equal, instr, "conversion overflow"); |
| __ fnclex(); |
| // Restore round mode. |
| __ X87SetRC(0x0000); |
| __ jmp(&done); |
| |
| __ bind(&below_one_half); |
| __ fld_d(Operand::StaticVariable(minus_one_half)); |
| __ fld(1); |
| __ FCmp(); |
| __ j(carry, &below_minus_one_half); |
| // We return 0 for the input range [+0, 0.5[, or [-0.5, 0.5[ if |
| // we can ignore the difference between a result of -0 and +0. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| // If the sign is positive, we return +0. |
| __ fld(0); |
| __ FXamSign(); |
| DeoptimizeIf(not_zero, instr, "minus zero"); |
| } |
| __ Move(result, Immediate(0)); |
| __ jmp(&done); |
| |
| __ bind(&below_minus_one_half); |
| __ fld(0); |
| __ fadd_d(Operand::StaticVariable(one_half)); |
| // rc=01B, round down. |
| __ X87SetRC(0x0400); |
| __ sub(esp, Immediate(kPointerSize)); |
| // Clear exception bits. |
| __ fnclex(); |
| __ fistp_s(MemOperand(esp, 0)); |
| // Check overflow. |
| __ X87CheckIA(); |
| __ pop(result); |
| DeoptimizeIf(equal, instr, "conversion overflow"); |
| __ fnclex(); |
| // Restore round mode. |
| __ X87SetRC(0x0000); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathFround(LMathFround* instr) { |
| X87Register input_reg = ToX87Register(instr->value()); |
| X87Fxch(input_reg); |
| __ sub(esp, Immediate(kPointerSize)); |
| __ fstp_s(MemOperand(esp, 0)); |
| X87Fld(MemOperand(esp, 0), kX87FloatOperand); |
| __ add(esp, Immediate(kPointerSize)); |
| } |
| |
| |
| void LCodeGen::DoMathSqrt(LMathSqrt* instr) { |
| X87Register input = ToX87Register(instr->value()); |
| X87Register result_reg = ToX87Register(instr->result()); |
| Register temp_result = ToRegister(instr->temp1()); |
| Register temp = ToRegister(instr->temp2()); |
| Label slow, done, smi, finish; |
| DCHECK(result_reg.is(input)); |
| |
| // Store input into Heap number and call runtime function kMathExpRT. |
| if (FLAG_inline_new) { |
| __ AllocateHeapNumber(temp_result, temp, no_reg, &slow); |
| __ jmp(&done, Label::kNear); |
| } |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| { |
| // TODO(3095996): Put a valid pointer value in the stack slot where the |
| // result register is stored, as this register is in the pointer map, but |
| // contains an integer value. |
| __ Move(temp_result, Immediate(0)); |
| |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(temp_result, eax); |
| } |
| __ bind(&done); |
| X87LoadForUsage(input); |
| __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| |
| { |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ push(temp_result); |
| __ CallRuntimeSaveDoubles(Runtime::kMathSqrtRT); |
| RecordSafepointWithRegisters(instr->pointer_map(), 1, |
| Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(temp_result, eax); |
| } |
| X87PrepareToWrite(result_reg); |
| // return value of MathExpRT is Smi or Heap Number. |
| __ JumpIfSmi(temp_result, &smi); |
| // Heap number(double) |
| __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| __ jmp(&finish); |
| // SMI |
| __ bind(&smi); |
| __ SmiUntag(temp_result); |
| __ push(temp_result); |
| __ fild_s(MemOperand(esp, 0)); |
| __ pop(temp_result); |
| __ bind(&finish); |
| X87CommitWrite(result_reg); |
| } |
| |
| |
| void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) { |
| X87Register input_reg = ToX87Register(instr->value()); |
| DCHECK(ToX87Register(instr->result()).is(input_reg)); |
| X87Fxch(input_reg); |
| // Note that according to ECMA-262 15.8.2.13: |
| // Math.pow(-Infinity, 0.5) == Infinity |
| // Math.sqrt(-Infinity) == NaN |
| Label done, sqrt; |
| // Check base for -Infinity. C3 == 0, C2 == 1, C1 == 1 and C0 == 1 |
| __ fxam(); |
| __ push(eax); |
| __ fnstsw_ax(); |
| __ and_(eax, Immediate(0x4700)); |
| __ cmp(eax, Immediate(0x0700)); |
| __ j(not_equal, &sqrt, Label::kNear); |
| // If input is -Infinity, return Infinity. |
| __ fchs(); |
| __ jmp(&done, Label::kNear); |
| |
| // Square root. |
| __ bind(&sqrt); |
| __ fldz(); |
| __ faddp(); // Convert -0 to +0. |
| __ fsqrt(); |
| __ bind(&done); |
| __ pop(eax); |
| } |
| |
| |
| void LCodeGen::DoPower(LPower* instr) { |
| Representation exponent_type = instr->hydrogen()->right()->representation(); |
| X87Register result = ToX87Register(instr->result()); |
| // Having marked this as a call, we can use any registers. |
| X87Register base = ToX87Register(instr->left()); |
| ExternalReference one_half = ExternalReference::address_of_one_half(); |
| |
| if (exponent_type.IsSmi()) { |
| Register exponent = ToRegister(instr->right()); |
| X87LoadForUsage(base); |
| __ SmiUntag(exponent); |
| __ push(exponent); |
| __ fild_s(MemOperand(esp, 0)); |
| __ pop(exponent); |
| } else if (exponent_type.IsTagged()) { |
| Register exponent = ToRegister(instr->right()); |
| Register temp = exponent.is(ecx) ? eax : ecx; |
| Label no_deopt, done; |
| X87LoadForUsage(base); |
| __ JumpIfSmi(exponent, &no_deopt); |
| __ CmpObjectType(exponent, HEAP_NUMBER_TYPE, temp); |
| DeoptimizeIf(not_equal, instr, "not a heap number"); |
| // Heap number(double) |
| __ fld_d(FieldOperand(exponent, HeapNumber::kValueOffset)); |
| __ jmp(&done); |
| // SMI |
| __ bind(&no_deopt); |
| __ SmiUntag(exponent); |
| __ push(exponent); |
| __ fild_s(MemOperand(esp, 0)); |
| __ pop(exponent); |
| __ bind(&done); |
| } else if (exponent_type.IsInteger32()) { |
| Register exponent = ToRegister(instr->right()); |
| X87LoadForUsage(base); |
| __ push(exponent); |
| __ fild_s(MemOperand(esp, 0)); |
| __ pop(exponent); |
| } else { |
| DCHECK(exponent_type.IsDouble()); |
| X87Register exponent_double = ToX87Register(instr->right()); |
| X87LoadForUsage(base, exponent_double); |
| } |
| |
| // FP data stack {base, exponent(TOS)}. |
| // Handle (exponent==+-0.5 && base == -0). |
| Label not_plus_0; |
| __ fld(0); |
| __ fabs(); |
| X87Fld(Operand::StaticVariable(one_half), kX87DoubleOperand); |
| __ FCmp(); |
| __ j(parity_even, ¬_plus_0, Label::kNear); // NaN. |
| __ j(not_equal, ¬_plus_0, Label::kNear); |
| __ fldz(); |
| // FP data stack {base, exponent(TOS), zero}. |
| __ faddp(2); |
| __ bind(¬_plus_0); |
| |
| { |
| __ PrepareCallCFunction(4, eax); |
| __ fstp_d(MemOperand(esp, kDoubleSize)); // Exponent value. |
| __ fstp_d(MemOperand(esp, 0)); // Base value. |
| X87PrepareToWrite(result); |
| __ CallCFunction(ExternalReference::power_double_double_function(isolate()), |
| 4); |
| // Return value is in st(0) on ia32. |
| X87CommitWrite(result); |
| } |
| } |
| |
| |
| void LCodeGen::DoMathLog(LMathLog* instr) { |
| DCHECK(instr->value()->Equals(instr->result())); |
| X87Register input_reg = ToX87Register(instr->value()); |
| X87Fxch(input_reg); |
| |
| Label positive, done, zero, nan_result; |
| __ fldz(); |
| __ fld(1); |
| __ FCmp(); |
| __ j(below, &nan_result, Label::kNear); |
| __ j(equal, &zero, Label::kNear); |
| // Positive input. |
| // {input, ln2}. |
| __ fldln2(); |
| // {ln2, input}. |
| __ fxch(); |
| // {result}. |
| __ fyl2x(); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&nan_result); |
| ExternalReference nan = |
| ExternalReference::address_of_canonical_non_hole_nan(); |
| X87PrepareToWrite(input_reg); |
| __ fld_d(Operand::StaticVariable(nan)); |
| X87CommitWrite(input_reg); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&zero); |
| ExternalReference ninf = ExternalReference::address_of_negative_infinity(); |
| X87PrepareToWrite(input_reg); |
| __ fld_d(Operand::StaticVariable(ninf)); |
| X87CommitWrite(input_reg); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathClz32(LMathClz32* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| Label not_zero_input; |
| __ bsr(result, input); |
| |
| __ j(not_zero, ¬_zero_input); |
| __ Move(result, Immediate(63)); // 63^31 == 32 |
| |
| __ bind(¬_zero_input); |
| __ xor_(result, Immediate(31)); // for x in [0..31], 31^x == 31-x. |
| } |
| |
| |
| void LCodeGen::DoMathExp(LMathExp* instr) { |
| X87Register input = ToX87Register(instr->value()); |
| X87Register result_reg = ToX87Register(instr->result()); |
| Register temp_result = ToRegister(instr->temp1()); |
| Register temp = ToRegister(instr->temp2()); |
| Label slow, done, smi, finish; |
| DCHECK(result_reg.is(input)); |
| |
| // Store input into Heap number and call runtime function kMathExpRT. |
| if (FLAG_inline_new) { |
| __ AllocateHeapNumber(temp_result, temp, no_reg, &slow); |
| __ jmp(&done, Label::kNear); |
| } |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| { |
| // TODO(3095996): Put a valid pointer value in the stack slot where the |
| // result register is stored, as this register is in the pointer map, but |
| // contains an integer value. |
| __ Move(temp_result, Immediate(0)); |
| |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters(instr->pointer_map(), 0, |
| Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(temp_result, eax); |
| } |
| __ bind(&done); |
| X87LoadForUsage(input); |
| __ fstp_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| |
| { |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ push(temp_result); |
| __ CallRuntimeSaveDoubles(Runtime::kMathExpRT); |
| RecordSafepointWithRegisters(instr->pointer_map(), 1, |
| Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(temp_result, eax); |
| } |
| X87PrepareToWrite(result_reg); |
| // return value of MathExpRT is Smi or Heap Number. |
| __ JumpIfSmi(temp_result, &smi); |
| // Heap number(double) |
| __ fld_d(FieldOperand(temp_result, HeapNumber::kValueOffset)); |
| __ jmp(&finish); |
| // SMI |
| __ bind(&smi); |
| __ SmiUntag(temp_result); |
| __ push(temp_result); |
| __ fild_s(MemOperand(esp, 0)); |
| __ pop(temp_result); |
| __ bind(&finish); |
| X87CommitWrite(result_reg); |
| } |
| |
| |
| void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->function()).is(edi)); |
| DCHECK(instr->HasPointerMap()); |
| |
| Handle<JSFunction> known_function = instr->hydrogen()->known_function(); |
| if (known_function.is_null()) { |
| LPointerMap* pointers = instr->pointer_map(); |
| SafepointGenerator generator( |
| this, pointers, Safepoint::kLazyDeopt); |
| ParameterCount count(instr->arity()); |
| __ InvokeFunction(edi, count, CALL_FUNCTION, generator); |
| } else { |
| CallKnownFunction(known_function, |
| instr->hydrogen()->formal_parameter_count(), |
| instr->arity(), |
| instr, |
| EDI_CONTAINS_TARGET); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallFunction(LCallFunction* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->function()).is(edi)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| int arity = instr->arity(); |
| CallFunctionStub stub(isolate(), arity, instr->hydrogen()->function_flags()); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoCallNew(LCallNew* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->constructor()).is(edi)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| // No cell in ebx for construct type feedback in optimized code |
| __ mov(ebx, isolate()->factory()->undefined_value()); |
| CallConstructStub stub(isolate(), NO_CALL_CONSTRUCTOR_FLAGS); |
| __ Move(eax, Immediate(instr->arity())); |
| CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr); |
| } |
| |
| |
| void LCodeGen::DoCallNewArray(LCallNewArray* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->constructor()).is(edi)); |
| DCHECK(ToRegister(instr->result()).is(eax)); |
| |
| __ Move(eax, Immediate(instr->arity())); |
| __ mov(ebx, isolate()->factory()->undefined_value()); |
| ElementsKind kind = instr->hydrogen()->elements_kind(); |
| AllocationSiteOverrideMode override_mode = |
| (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE) |
| ? DISABLE_ALLOCATION_SITES |
| : DONT_OVERRIDE; |
| |
| if (instr->arity() == 0) { |
| ArrayNoArgumentConstructorStub stub(isolate(), kind, override_mode); |
| CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr); |
| } else if (instr->arity() == 1) { |
| Label done; |
| if (IsFastPackedElementsKind(kind)) { |
| Label packed_case; |
| // We might need a change here |
| // look at the first argument |
| __ mov(ecx, Operand(esp, 0)); |
| __ test(ecx, ecx); |
| __ j(zero, &packed_case, Label::kNear); |
| |
| ElementsKind holey_kind = GetHoleyElementsKind(kind); |
| ArraySingleArgumentConstructorStub stub(isolate(), |
| holey_kind, |
| override_mode); |
| CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr); |
| __ jmp(&done, Label::kNear); |
| __ bind(&packed_case); |
| } |
| |
| ArraySingleArgumentConstructorStub stub(isolate(), kind, override_mode); |
| CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr); |
| __ bind(&done); |
| } else { |
| ArrayNArgumentsConstructorStub stub(isolate(), kind, override_mode); |
| CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallRuntime(LCallRuntime* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| CallRuntime(instr->function(), instr->arity(), instr, instr->save_doubles()); |
| } |
| |
| |
| void LCodeGen::DoStoreCodeEntry(LStoreCodeEntry* instr) { |
| Register function = ToRegister(instr->function()); |
| Register code_object = ToRegister(instr->code_object()); |
| __ lea(code_object, FieldOperand(code_object, Code::kHeaderSize)); |
| __ mov(FieldOperand(function, JSFunction::kCodeEntryOffset), code_object); |
| } |
| |
| |
| void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) { |
| Register result = ToRegister(instr->result()); |
| Register base = ToRegister(instr->base_object()); |
| if (instr->offset()->IsConstantOperand()) { |
| LConstantOperand* offset = LConstantOperand::cast(instr->offset()); |
| __ lea(result, Operand(base, ToInteger32(offset))); |
| } else { |
| Register offset = ToRegister(instr->offset()); |
| __ lea(result, Operand(base, offset, times_1, 0)); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) { |
| Representation representation = instr->hydrogen()->field_representation(); |
| |
| HObjectAccess access = instr->hydrogen()->access(); |
| int offset = access.offset(); |
| |
| if (access.IsExternalMemory()) { |
| DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| MemOperand operand = instr->object()->IsConstantOperand() |
| ? MemOperand::StaticVariable( |
| ToExternalReference(LConstantOperand::cast(instr->object()))) |
| : MemOperand(ToRegister(instr->object()), offset); |
| if (instr->value()->IsConstantOperand()) { |
| LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| __ mov(operand, Immediate(ToInteger32(operand_value))); |
| } else { |
| Register value = ToRegister(instr->value()); |
| __ Store(value, operand, representation); |
| } |
| return; |
| } |
| |
| Register object = ToRegister(instr->object()); |
| __ AssertNotSmi(object); |
| DCHECK(!representation.IsSmi() || |
| !instr->value()->IsConstantOperand() || |
| IsSmi(LConstantOperand::cast(instr->value()))); |
| if (representation.IsDouble()) { |
| DCHECK(access.IsInobject()); |
| DCHECK(!instr->hydrogen()->has_transition()); |
| DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| X87Register value = ToX87Register(instr->value()); |
| X87Mov(FieldOperand(object, offset), value); |
| return; |
| } |
| |
| if (instr->hydrogen()->has_transition()) { |
| Handle<Map> transition = instr->hydrogen()->transition_map(); |
| AddDeprecationDependency(transition); |
| __ mov(FieldOperand(object, HeapObject::kMapOffset), transition); |
| if (instr->hydrogen()->NeedsWriteBarrierForMap()) { |
| Register temp = ToRegister(instr->temp()); |
| Register temp_map = ToRegister(instr->temp_map()); |
| __ mov(temp_map, transition); |
| __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map); |
| // Update the write barrier for the map field. |
| __ RecordWriteForMap(object, transition, temp_map, temp, kSaveFPRegs); |
| } |
| } |
| |
| // Do the store. |
| Register write_register = object; |
| if (!access.IsInobject()) { |
| write_register = ToRegister(instr->temp()); |
| __ mov(write_register, FieldOperand(object, JSObject::kPropertiesOffset)); |
| } |
| |
| MemOperand operand = FieldOperand(write_register, offset); |
| if (instr->value()->IsConstantOperand()) { |
| LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| if (operand_value->IsRegister()) { |
| Register value = ToRegister(operand_value); |
| __ Store(value, operand, representation); |
| } else if (representation.IsInteger32()) { |
| Immediate immediate = ToImmediate(operand_value, representation); |
| DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| __ mov(operand, immediate); |
| } else { |
| Handle<Object> handle_value = ToHandle(operand_value); |
| DCHECK(!instr->hydrogen()->NeedsWriteBarrier()); |
| __ mov(operand, handle_value); |
| } |
| } else { |
| Register value = ToRegister(instr->value()); |
| __ Store(value, operand, representation); |
| } |
| |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| Register value = ToRegister(instr->value()); |
| Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object; |
| // Update the write barrier for the object for in-object properties. |
| __ RecordWriteField(write_register, offset, value, temp, kSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| instr->hydrogen()->SmiCheckForWriteBarrier(), |
| instr->hydrogen()->PointersToHereCheckForValue()); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister())); |
| DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister())); |
| |
| __ mov(StoreDescriptor::NameRegister(), instr->name()); |
| Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->strict_mode()); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) { |
| Condition cc = instr->hydrogen()->allow_equality() ? above : above_equal; |
| if (instr->index()->IsConstantOperand()) { |
| __ cmp(ToOperand(instr->length()), |
| ToImmediate(LConstantOperand::cast(instr->index()), |
| instr->hydrogen()->length()->representation())); |
| cc = CommuteCondition(cc); |
| } else if (instr->length()->IsConstantOperand()) { |
| __ cmp(ToOperand(instr->index()), |
| ToImmediate(LConstantOperand::cast(instr->length()), |
| instr->hydrogen()->index()->representation())); |
| } else { |
| __ cmp(ToRegister(instr->index()), ToOperand(instr->length())); |
| } |
| if (FLAG_debug_code && instr->hydrogen()->skip_check()) { |
| Label done; |
| __ j(NegateCondition(cc), &done, Label::kNear); |
| __ int3(); |
| __ bind(&done); |
| } else { |
| DeoptimizeIf(cc, instr, "out of bounds"); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) { |
| ElementsKind elements_kind = instr->elements_kind(); |
| LOperand* key = instr->key(); |
| if (!key->IsConstantOperand() && |
| ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(), |
| elements_kind)) { |
| __ SmiUntag(ToRegister(key)); |
| } |
| Operand operand(BuildFastArrayOperand( |
| instr->elements(), |
| key, |
| instr->hydrogen()->key()->representation(), |
| elements_kind, |
| instr->base_offset())); |
| if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS || |
| elements_kind == FLOAT32_ELEMENTS) { |
| X87Mov(operand, ToX87Register(instr->value()), kX87FloatOperand); |
| } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS || |
| elements_kind == FLOAT64_ELEMENTS) { |
| X87Mov(operand, ToX87Register(instr->value())); |
| } else { |
| Register value = ToRegister(instr->value()); |
| switch (elements_kind) { |
| case EXTERNAL_UINT8_CLAMPED_ELEMENTS: |
| case EXTERNAL_UINT8_ELEMENTS: |
| case EXTERNAL_INT8_ELEMENTS: |
| case UINT8_ELEMENTS: |
| case INT8_ELEMENTS: |
| case UINT8_CLAMPED_ELEMENTS: |
| __ mov_b(operand, value); |
| break; |
| case EXTERNAL_INT16_ELEMENTS: |
| case EXTERNAL_UINT16_ELEMENTS: |
| case UINT16_ELEMENTS: |
| case INT16_ELEMENTS: |
| __ mov_w(operand, value); |
| break; |
| case EXTERNAL_INT32_ELEMENTS: |
| case EXTERNAL_UINT32_ELEMENTS: |
| case UINT32_ELEMENTS: |
| case INT32_ELEMENTS: |
| __ mov(operand, value); |
| break; |
| case EXTERNAL_FLOAT32_ELEMENTS: |
| case EXTERNAL_FLOAT64_ELEMENTS: |
| case FLOAT32_ELEMENTS: |
| case FLOAT64_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case SLOPPY_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) { |
| ExternalReference canonical_nan_reference = |
| ExternalReference::address_of_canonical_non_hole_nan(); |
| Operand double_store_operand = BuildFastArrayOperand( |
| instr->elements(), |
| instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_DOUBLE_ELEMENTS, |
| instr->base_offset()); |
| |
| // Can't use SSE2 in the serializer |
| if (instr->hydrogen()->IsConstantHoleStore()) { |
| // This means we should store the (double) hole. No floating point |
| // registers required. |
| double nan_double = FixedDoubleArray::hole_nan_as_double(); |
| uint64_t int_val = bit_cast<uint64_t, double>(nan_double); |
| int32_t lower = static_cast<int32_t>(int_val); |
| int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt)); |
| |
| __ mov(double_store_operand, Immediate(lower)); |
| Operand double_store_operand2 = BuildFastArrayOperand( |
| instr->elements(), |
| instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_DOUBLE_ELEMENTS, |
| instr->base_offset() + kPointerSize); |
| __ mov(double_store_operand2, Immediate(upper)); |
| } else { |
| Label no_special_nan_handling; |
| X87Register value = ToX87Register(instr->value()); |
| X87Fxch(value); |
| |
| if (instr->NeedsCanonicalization()) { |
| __ fld(0); |
| __ fld(0); |
| __ FCmp(); |
| |
| __ j(parity_odd, &no_special_nan_handling, Label::kNear); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ fst_d(MemOperand(esp, 0)); |
| __ cmp(MemOperand(esp, sizeof(kHoleNanLower32)), |
| Immediate(kHoleNanUpper32)); |
| __ add(esp, Immediate(kDoubleSize)); |
| Label canonicalize; |
| __ j(not_equal, &canonicalize, Label::kNear); |
| __ jmp(&no_special_nan_handling, Label::kNear); |
| __ bind(&canonicalize); |
| __ fstp(0); |
| __ fld_d(Operand::StaticVariable(canonical_nan_reference)); |
| } |
| |
| __ bind(&no_special_nan_handling); |
| __ fst_d(double_store_operand); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) { |
| Register elements = ToRegister(instr->elements()); |
| Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg; |
| |
| Operand operand = BuildFastArrayOperand( |
| instr->elements(), |
| instr->key(), |
| instr->hydrogen()->key()->representation(), |
| FAST_ELEMENTS, |
| instr->base_offset()); |
| if (instr->value()->IsRegister()) { |
| __ mov(operand, ToRegister(instr->value())); |
| } else { |
| LConstantOperand* operand_value = LConstantOperand::cast(instr->value()); |
| if (IsSmi(operand_value)) { |
| Immediate immediate = ToImmediate(operand_value, Representation::Smi()); |
| __ mov(operand, immediate); |
| } else { |
| DCHECK(!IsInteger32(operand_value)); |
| Handle<Object> handle_value = ToHandle(operand_value); |
| __ mov(operand, handle_value); |
| } |
| } |
| |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| DCHECK(instr->value()->IsRegister()); |
| Register value = ToRegister(instr->value()); |
| DCHECK(!instr->key()->IsConstantOperand()); |
| SmiCheck check_needed = |
| instr->hydrogen()->value()->type().IsHeapObject() |
| ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| // Compute address of modified element and store it into key register. |
| __ lea(key, operand); |
| __ RecordWrite(elements, key, value, kSaveFPRegs, EMIT_REMEMBERED_SET, |
| check_needed, |
| instr->hydrogen()->PointersToHereCheckForValue()); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) { |
| // By cases...external, fast-double, fast |
| if (instr->is_typed_elements()) { |
| DoStoreKeyedExternalArray(instr); |
| } else if (instr->hydrogen()->value()->representation().IsDouble()) { |
| DoStoreKeyedFixedDoubleArray(instr); |
| } else { |
| DoStoreKeyedFixedArray(instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister())); |
| DCHECK(ToRegister(instr->key()).is(StoreDescriptor::NameRegister())); |
| DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister())); |
| |
| Handle<Code> ic = |
| CodeFactory::KeyedStoreIC(isolate(), instr->strict_mode()).code(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoTrapAllocationMemento(LTrapAllocationMemento* instr) { |
| Register object = ToRegister(instr->object()); |
| Register temp = ToRegister(instr->temp()); |
| Label no_memento_found; |
| __ TestJSArrayForAllocationMemento(object, temp, &no_memento_found); |
| DeoptimizeIf(equal, instr, "memento found"); |
| __ bind(&no_memento_found); |
| } |
| |
| |
| void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) { |
| Register object_reg = ToRegister(instr->object()); |
| |
| Handle<Map> from_map = instr->original_map(); |
| Handle<Map> to_map = instr->transitioned_map(); |
| ElementsKind from_kind = instr->from_kind(); |
| ElementsKind to_kind = instr->to_kind(); |
| |
| Label not_applicable; |
| bool is_simple_map_transition = |
| IsSimpleMapChangeTransition(from_kind, to_kind); |
| Label::Distance branch_distance = |
| is_simple_map_transition ? Label::kNear : Label::kFar; |
| __ cmp(FieldOperand(object_reg, HeapObject::kMapOffset), from_map); |
| __ j(not_equal, ¬_applicable, branch_distance); |
| if (is_simple_map_transition) { |
| Register new_map_reg = ToRegister(instr->new_map_temp()); |
| __ mov(FieldOperand(object_reg, HeapObject::kMapOffset), |
| Immediate(to_map)); |
| // Write barrier. |
| DCHECK_NE(instr->temp(), NULL); |
| __ RecordWriteForMap(object_reg, to_map, new_map_reg, |
| ToRegister(instr->temp()), kDontSaveFPRegs); |
| } else { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(object_reg.is(eax)); |
| PushSafepointRegistersScope scope(this); |
| __ mov(ebx, to_map); |
| bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE; |
| TransitionElementsKindStub stub(isolate(), from_kind, to_kind, is_js_array); |
| __ CallStub(&stub); |
| RecordSafepointWithLazyDeopt(instr, |
| RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| } |
| __ bind(¬_applicable); |
| } |
| |
| |
| void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) { |
| class DeferredStringCharCodeAt FINAL : public LDeferredCode { |
| public: |
| DeferredStringCharCodeAt(LCodeGen* codegen, |
| LStringCharCodeAt* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { codegen()->DoDeferredStringCharCodeAt(instr_); } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LStringCharCodeAt* instr_; |
| }; |
| |
| DeferredStringCharCodeAt* deferred = |
| new(zone()) DeferredStringCharCodeAt(this, instr, x87_stack_); |
| |
| StringCharLoadGenerator::Generate(masm(), |
| factory(), |
| ToRegister(instr->string()), |
| ToRegister(instr->index()), |
| ToRegister(instr->result()), |
| deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) { |
| Register string = ToRegister(instr->string()); |
| Register result = ToRegister(instr->result()); |
| |
| // TODO(3095996): Get rid of this. For now, we need to make the |
| // result register contain a valid pointer because it is already |
| // contained in the register pointer map. |
| __ Move(result, Immediate(0)); |
| |
| PushSafepointRegistersScope scope(this); |
| __ push(string); |
| // Push the index as a smi. This is safe because of the checks in |
| // DoStringCharCodeAt above. |
| STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue); |
| if (instr->index()->IsConstantOperand()) { |
| Immediate immediate = ToImmediate(LConstantOperand::cast(instr->index()), |
| Representation::Smi()); |
| __ push(immediate); |
| } else { |
| Register index = ToRegister(instr->index()); |
| __ SmiTag(index); |
| __ push(index); |
| } |
| CallRuntimeFromDeferred(Runtime::kStringCharCodeAtRT, 2, |
| instr, instr->context()); |
| __ AssertSmi(eax); |
| __ SmiUntag(eax); |
| __ StoreToSafepointRegisterSlot(result, eax); |
| } |
| |
| |
| void LCodeGen::DoStringCharFromCode(LStringCharFromCode* instr) { |
| class DeferredStringCharFromCode FINAL : public LDeferredCode { |
| public: |
| DeferredStringCharFromCode(LCodeGen* codegen, |
| LStringCharFromCode* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredStringCharFromCode(instr_); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LStringCharFromCode* instr_; |
| }; |
| |
| DeferredStringCharFromCode* deferred = |
| new(zone()) DeferredStringCharFromCode(this, instr, x87_stack_); |
| |
| DCHECK(instr->hydrogen()->value()->representation().IsInteger32()); |
| Register char_code = ToRegister(instr->char_code()); |
| Register result = ToRegister(instr->result()); |
| DCHECK(!char_code.is(result)); |
| |
| __ cmp(char_code, String::kMaxOneByteCharCode); |
| __ j(above, deferred->entry()); |
| __ Move(result, Immediate(factory()->single_character_string_cache())); |
| __ mov(result, FieldOperand(result, |
| char_code, times_pointer_size, |
| FixedArray::kHeaderSize)); |
| __ cmp(result, factory()->undefined_value()); |
| __ j(equal, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) { |
| Register char_code = ToRegister(instr->char_code()); |
| Register result = ToRegister(instr->result()); |
| |
| // TODO(3095996): Get rid of this. For now, we need to make the |
| // result register contain a valid pointer because it is already |
| // contained in the register pointer map. |
| __ Move(result, Immediate(0)); |
| |
| PushSafepointRegistersScope scope(this); |
| __ SmiTag(char_code); |
| __ push(char_code); |
| CallRuntimeFromDeferred(Runtime::kCharFromCode, 1, instr, instr->context()); |
| __ StoreToSafepointRegisterSlot(result, eax); |
| } |
| |
| |
| void LCodeGen::DoStringAdd(LStringAdd* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| DCHECK(ToRegister(instr->left()).is(edx)); |
| DCHECK(ToRegister(instr->right()).is(eax)); |
| StringAddStub stub(isolate(), |
| instr->hydrogen()->flags(), |
| instr->hydrogen()->pretenure_flag()); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) { |
| LOperand* input = instr->value(); |
| LOperand* output = instr->result(); |
| DCHECK(input->IsRegister() || input->IsStackSlot()); |
| DCHECK(output->IsDoubleRegister()); |
| if (input->IsRegister()) { |
| Register input_reg = ToRegister(input); |
| __ push(input_reg); |
| X87Mov(ToX87Register(output), Operand(esp, 0), kX87IntOperand); |
| __ pop(input_reg); |
| } else { |
| X87Mov(ToX87Register(output), ToOperand(input), kX87IntOperand); |
| } |
| } |
| |
| |
| void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) { |
| LOperand* input = instr->value(); |
| LOperand* output = instr->result(); |
| X87Register res = ToX87Register(output); |
| X87PrepareToWrite(res); |
| __ LoadUint32NoSSE2(ToRegister(input)); |
| X87CommitWrite(res); |
| } |
| |
| |
| void LCodeGen::DoNumberTagI(LNumberTagI* instr) { |
| class DeferredNumberTagI FINAL : public LDeferredCode { |
| public: |
| DeferredNumberTagI(LCodeGen* codegen, |
| LNumberTagI* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp(), |
| SIGNED_INT32); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LNumberTagI* instr_; |
| }; |
| |
| LOperand* input = instr->value(); |
| DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| Register reg = ToRegister(input); |
| |
| DeferredNumberTagI* deferred = |
| new(zone()) DeferredNumberTagI(this, instr, x87_stack_); |
| __ SmiTag(reg); |
| __ j(overflow, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoNumberTagU(LNumberTagU* instr) { |
| class DeferredNumberTagU FINAL : public LDeferredCode { |
| public: |
| DeferredNumberTagU(LCodeGen* codegen, |
| LNumberTagU* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp(), |
| UNSIGNED_INT32); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LNumberTagU* instr_; |
| }; |
| |
| LOperand* input = instr->value(); |
| DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| Register reg = ToRegister(input); |
| |
| DeferredNumberTagU* deferred = |
| new(zone()) DeferredNumberTagU(this, instr, x87_stack_); |
| __ cmp(reg, Immediate(Smi::kMaxValue)); |
| __ j(above, deferred->entry()); |
| __ SmiTag(reg); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr, |
| LOperand* value, |
| LOperand* temp, |
| IntegerSignedness signedness) { |
| Label done, slow; |
| Register reg = ToRegister(value); |
| Register tmp = ToRegister(temp); |
| |
| if (signedness == SIGNED_INT32) { |
| // There was overflow, so bits 30 and 31 of the original integer |
| // disagree. Try to allocate a heap number in new space and store |
| // the value in there. If that fails, call the runtime system. |
| __ SmiUntag(reg); |
| __ xor_(reg, 0x80000000); |
| __ push(reg); |
| __ fild_s(Operand(esp, 0)); |
| __ pop(reg); |
| } else { |
| // There's no fild variant for unsigned values, so zero-extend to a 64-bit |
| // int manually. |
| __ push(Immediate(0)); |
| __ push(reg); |
| __ fild_d(Operand(esp, 0)); |
| __ pop(reg); |
| __ pop(reg); |
| } |
| |
| if (FLAG_inline_new) { |
| __ AllocateHeapNumber(reg, tmp, no_reg, &slow); |
| __ jmp(&done, Label::kNear); |
| } |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| { |
| // TODO(3095996): Put a valid pointer value in the stack slot where the |
| // result register is stored, as this register is in the pointer map, but |
| // contains an integer value. |
| __ Move(reg, Immediate(0)); |
| |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this); |
| |
| // NumberTagI and NumberTagD use the context from the frame, rather than |
| // the environment's HContext or HInlinedContext value. |
| // They only call Runtime::kAllocateHeapNumber. |
| // The corresponding HChange instructions are added in a phase that does |
| // not have easy access to the local context. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(reg, eax); |
| } |
| |
| __ bind(&done); |
| __ fstp_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| } |
| |
| |
| void LCodeGen::DoNumberTagD(LNumberTagD* instr) { |
| class DeferredNumberTagD FINAL : public LDeferredCode { |
| public: |
| DeferredNumberTagD(LCodeGen* codegen, |
| LNumberTagD* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { codegen()->DoDeferredNumberTagD(instr_); } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LNumberTagD* instr_; |
| }; |
| |
| Register reg = ToRegister(instr->result()); |
| |
| // Put the value to the top of stack |
| X87Register src = ToX87Register(instr->value()); |
| // Don't use X87LoadForUsage here, which is only used by Instruction which |
| // clobbers fp registers. |
| x87_stack_.Fxch(src); |
| |
| DeferredNumberTagD* deferred = |
| new(zone()) DeferredNumberTagD(this, instr, x87_stack_); |
| if (FLAG_inline_new) { |
| Register tmp = ToRegister(instr->temp()); |
| __ AllocateHeapNumber(reg, tmp, no_reg, deferred->entry()); |
| } else { |
| __ jmp(deferred->entry()); |
| } |
| __ bind(deferred->exit()); |
| __ fst_d(FieldOperand(reg, HeapNumber::kValueOffset)); |
| } |
| |
| |
| void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) { |
| // TODO(3095996): Get rid of this. For now, we need to make the |
| // result register contain a valid pointer because it is already |
| // contained in the register pointer map. |
| Register reg = ToRegister(instr->result()); |
| __ Move(reg, Immediate(0)); |
| |
| PushSafepointRegistersScope scope(this); |
| // NumberTagI and NumberTagD use the context from the frame, rather than |
| // the environment's HContext or HInlinedContext value. |
| // They only call Runtime::kAllocateHeapNumber. |
| // The corresponding HChange instructions are added in a phase that does |
| // not have easy access to the local context. |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(reg, eax); |
| } |
| |
| |
| void LCodeGen::DoSmiTag(LSmiTag* instr) { |
| HChange* hchange = instr->hydrogen(); |
| Register input = ToRegister(instr->value()); |
| if (hchange->CheckFlag(HValue::kCanOverflow) && |
| hchange->value()->CheckFlag(HValue::kUint32)) { |
| __ test(input, Immediate(0xc0000000)); |
| DeoptimizeIf(not_zero, instr, "overflow"); |
| } |
| __ SmiTag(input); |
| if (hchange->CheckFlag(HValue::kCanOverflow) && |
| !hchange->value()->CheckFlag(HValue::kUint32)) { |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| } |
| |
| |
| void LCodeGen::DoSmiUntag(LSmiUntag* instr) { |
| LOperand* input = instr->value(); |
| Register result = ToRegister(input); |
| DCHECK(input->IsRegister() && input->Equals(instr->result())); |
| if (instr->needs_check()) { |
| __ test(result, Immediate(kSmiTagMask)); |
| DeoptimizeIf(not_zero, instr, "not a Smi"); |
| } else { |
| __ AssertSmi(result); |
| } |
| __ SmiUntag(result); |
| } |
| |
| |
| void LCodeGen::EmitNumberUntagDNoSSE2(LNumberUntagD* instr, Register input_reg, |
| Register temp_reg, X87Register res_reg, |
| NumberUntagDMode mode) { |
| bool can_convert_undefined_to_nan = |
| instr->hydrogen()->can_convert_undefined_to_nan(); |
| bool deoptimize_on_minus_zero = instr->hydrogen()->deoptimize_on_minus_zero(); |
| |
| Label load_smi, done; |
| |
| X87PrepareToWrite(res_reg); |
| if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED) { |
| // Smi check. |
| __ JumpIfSmi(input_reg, &load_smi); |
| |
| // Heap number map check. |
| __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| if (!can_convert_undefined_to_nan) { |
| DeoptimizeIf(not_equal, instr, "not a heap number"); |
| } else { |
| Label heap_number, convert; |
| __ j(equal, &heap_number); |
| |
| // Convert undefined (or hole) to NaN. |
| __ cmp(input_reg, factory()->undefined_value()); |
| DeoptimizeIf(not_equal, instr, "not a heap number/undefined"); |
| |
| __ bind(&convert); |
| ExternalReference nan = |
| ExternalReference::address_of_canonical_non_hole_nan(); |
| __ fld_d(Operand::StaticVariable(nan)); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&heap_number); |
| } |
| // Heap number to x87 conversion. |
| __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| if (deoptimize_on_minus_zero) { |
| __ fldz(); |
| __ FCmp(); |
| __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| __ j(not_zero, &done, Label::kNear); |
| |
| // Use general purpose registers to check if we have -0.0 |
| __ mov(temp_reg, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| __ test(temp_reg, Immediate(HeapNumber::kSignMask)); |
| __ j(zero, &done, Label::kNear); |
| |
| // Pop FPU stack before deoptimizing. |
| __ fstp(0); |
| DeoptimizeIf(not_zero, instr, "minus zero"); |
| } |
| __ jmp(&done, Label::kNear); |
| } else { |
| DCHECK(mode == NUMBER_CANDIDATE_IS_SMI); |
| } |
| |
| __ bind(&load_smi); |
| // Clobbering a temp is faster than re-tagging the |
| // input register since we avoid dependencies. |
| __ mov(temp_reg, input_reg); |
| __ SmiUntag(temp_reg); // Untag smi before converting to float. |
| __ push(temp_reg); |
| __ fild_s(Operand(esp, 0)); |
| __ add(esp, Immediate(kPointerSize)); |
| __ bind(&done); |
| X87CommitWrite(res_reg); |
| } |
| |
| |
| void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr, Label* done) { |
| Register input_reg = ToRegister(instr->value()); |
| |
| // The input was optimistically untagged; revert it. |
| STATIC_ASSERT(kSmiTagSize == 1); |
| __ lea(input_reg, Operand(input_reg, times_2, kHeapObjectTag)); |
| |
| if (instr->truncating()) { |
| Label no_heap_number, check_bools, check_false; |
| |
| // Heap number map check. |
| __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| __ j(not_equal, &no_heap_number, Label::kNear); |
| __ TruncateHeapNumberToI(input_reg, input_reg); |
| __ jmp(done); |
| |
| __ bind(&no_heap_number); |
| // Check for Oddballs. Undefined/False is converted to zero and True to one |
| // for truncating conversions. |
| __ cmp(input_reg, factory()->undefined_value()); |
| __ j(not_equal, &check_bools, Label::kNear); |
| __ Move(input_reg, Immediate(0)); |
| __ jmp(done); |
| |
| __ bind(&check_bools); |
| __ cmp(input_reg, factory()->true_value()); |
| __ j(not_equal, &check_false, Label::kNear); |
| __ Move(input_reg, Immediate(1)); |
| __ jmp(done); |
| |
| __ bind(&check_false); |
| __ cmp(input_reg, factory()->false_value()); |
| DeoptimizeIf(not_equal, instr, "not a heap number/undefined/true/false"); |
| __ Move(input_reg, Immediate(0)); |
| } else { |
| // TODO(olivf) Converting a number on the fpu is actually quite slow. We |
| // should first try a fast conversion and then bailout to this slow case. |
| __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| isolate()->factory()->heap_number_map()); |
| DeoptimizeIf(not_equal, instr, "not a heap number"); |
| |
| __ sub(esp, Immediate(kPointerSize)); |
| __ fld_d(FieldOperand(input_reg, HeapNumber::kValueOffset)); |
| |
| if (instr->hydrogen()->GetMinusZeroMode() == FAIL_ON_MINUS_ZERO) { |
| Label no_precision_lost, not_nan, zero_check; |
| __ fld(0); |
| |
| __ fist_s(MemOperand(esp, 0)); |
| __ fild_s(MemOperand(esp, 0)); |
| __ FCmp(); |
| __ pop(input_reg); |
| |
| __ j(equal, &no_precision_lost, Label::kNear); |
| __ fstp(0); |
| DeoptimizeIf(no_condition, instr, "lost precision"); |
| __ bind(&no_precision_lost); |
| |
| __ j(parity_odd, ¬_nan); |
| __ fstp(0); |
| DeoptimizeIf(no_condition, instr, "NaN"); |
| __ bind(¬_nan); |
| |
| __ test(input_reg, Operand(input_reg)); |
| __ j(zero, &zero_check, Label::kNear); |
| __ fstp(0); |
| __ jmp(done); |
| |
| __ bind(&zero_check); |
| // To check for minus zero, we load the value again as float, and check |
| // if that is still 0. |
| __ sub(esp, Immediate(kPointerSize)); |
| __ fstp_s(Operand(esp, 0)); |
| __ pop(input_reg); |
| __ test(input_reg, Operand(input_reg)); |
| DeoptimizeIf(not_zero, instr, "minus zero"); |
| } else { |
| __ fist_s(MemOperand(esp, 0)); |
| __ fild_s(MemOperand(esp, 0)); |
| __ FCmp(); |
| __ pop(input_reg); |
| DeoptimizeIf(not_equal, instr, "lost precision"); |
| DeoptimizeIf(parity_even, instr, "NaN"); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoTaggedToI(LTaggedToI* instr) { |
| class DeferredTaggedToI FINAL : public LDeferredCode { |
| public: |
| DeferredTaggedToI(LCodeGen* codegen, |
| LTaggedToI* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { codegen()->DoDeferredTaggedToI(instr_, done()); } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LTaggedToI* instr_; |
| }; |
| |
| LOperand* input = instr->value(); |
| DCHECK(input->IsRegister()); |
| Register input_reg = ToRegister(input); |
| DCHECK(input_reg.is(ToRegister(instr->result()))); |
| |
| if (instr->hydrogen()->value()->representation().IsSmi()) { |
| __ SmiUntag(input_reg); |
| } else { |
| DeferredTaggedToI* deferred = |
| new(zone()) DeferredTaggedToI(this, instr, x87_stack_); |
| // Optimistically untag the input. |
| // If the input is a HeapObject, SmiUntag will set the carry flag. |
| STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| __ SmiUntag(input_reg); |
| // Branch to deferred code if the input was tagged. |
| // The deferred code will take care of restoring the tag. |
| __ j(carry, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| } |
| |
| |
| void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { |
| LOperand* input = instr->value(); |
| DCHECK(input->IsRegister()); |
| LOperand* temp = instr->temp(); |
| DCHECK(temp->IsRegister()); |
| LOperand* result = instr->result(); |
| DCHECK(result->IsDoubleRegister()); |
| |
| Register input_reg = ToRegister(input); |
| Register temp_reg = ToRegister(temp); |
| |
| HValue* value = instr->hydrogen()->value(); |
| NumberUntagDMode mode = value->representation().IsSmi() |
| ? NUMBER_CANDIDATE_IS_SMI : NUMBER_CANDIDATE_IS_ANY_TAGGED; |
| |
| EmitNumberUntagDNoSSE2(instr, input_reg, temp_reg, ToX87Register(result), |
| mode); |
| } |
| |
| |
| void LCodeGen::DoDoubleToI(LDoubleToI* instr) { |
| LOperand* input = instr->value(); |
| DCHECK(input->IsDoubleRegister()); |
| LOperand* result = instr->result(); |
| DCHECK(result->IsRegister()); |
| Register result_reg = ToRegister(result); |
| |
| if (instr->truncating()) { |
| X87Register input_reg = ToX87Register(input); |
| X87Fxch(input_reg); |
| __ TruncateX87TOSToI(result_reg); |
| } else { |
| Label lost_precision, is_nan, minus_zero, done; |
| X87Register input_reg = ToX87Register(input); |
| X87Fxch(input_reg); |
| __ X87TOSToI(result_reg, instr->hydrogen()->GetMinusZeroMode(), |
| &lost_precision, &is_nan, &minus_zero); |
| __ jmp(&done); |
| __ bind(&lost_precision); |
| DeoptimizeIf(no_condition, instr, "lost precision"); |
| __ bind(&is_nan); |
| DeoptimizeIf(no_condition, instr, "NaN"); |
| __ bind(&minus_zero); |
| DeoptimizeIf(no_condition, instr, "minus zero"); |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) { |
| LOperand* input = instr->value(); |
| DCHECK(input->IsDoubleRegister()); |
| LOperand* result = instr->result(); |
| DCHECK(result->IsRegister()); |
| Register result_reg = ToRegister(result); |
| |
| Label lost_precision, is_nan, minus_zero, done; |
| X87Register input_reg = ToX87Register(input); |
| X87Fxch(input_reg); |
| __ X87TOSToI(result_reg, instr->hydrogen()->GetMinusZeroMode(), |
| &lost_precision, &is_nan, &minus_zero); |
| __ jmp(&done); |
| __ bind(&lost_precision); |
| DeoptimizeIf(no_condition, instr, "lost precision"); |
| __ bind(&is_nan); |
| DeoptimizeIf(no_condition, instr, "NaN"); |
| __ bind(&minus_zero); |
| DeoptimizeIf(no_condition, instr, "minus zero"); |
| __ bind(&done); |
| __ SmiTag(result_reg); |
| DeoptimizeIf(overflow, instr, "overflow"); |
| } |
| |
| |
| void LCodeGen::DoCheckSmi(LCheckSmi* instr) { |
| LOperand* input = instr->value(); |
| __ test(ToOperand(input), Immediate(kSmiTagMask)); |
| DeoptimizeIf(not_zero, instr, "not a Smi"); |
| } |
| |
| |
| void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) { |
| if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| LOperand* input = instr->value(); |
| __ test(ToOperand(input), Immediate(kSmiTagMask)); |
| DeoptimizeIf(zero, instr, "Smi"); |
| } |
| } |
| |
| |
| void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| __ mov(temp, FieldOperand(input, HeapObject::kMapOffset)); |
| |
| if (instr->hydrogen()->is_interval_check()) { |
| InstanceType first; |
| InstanceType last; |
| instr->hydrogen()->GetCheckInterval(&first, &last); |
| |
| __ cmpb(FieldOperand(temp, Map::kInstanceTypeOffset), |
| static_cast<int8_t>(first)); |
| |
| // If there is only one type in the interval check for equality. |
| if (first == last) { |
| DeoptimizeIf(not_equal, instr, "wrong instance type"); |
| } else { |
| DeoptimizeIf(below, instr, "wrong instance type"); |
| // Omit check for the last type. |
| if (last != LAST_TYPE) { |
| __ cmpb(FieldOperand(temp, Map::kInstanceTypeOffset), |
| static_cast<int8_t>(last)); |
| DeoptimizeIf(above, instr, "wrong instance type"); |
| } |
| } |
| } else { |
| uint8_t mask; |
| uint8_t tag; |
| instr->hydrogen()->GetCheckMaskAndTag(&mask, &tag); |
| |
| if (base::bits::IsPowerOfTwo32(mask)) { |
| DCHECK(tag == 0 || base::bits::IsPowerOfTwo32(tag)); |
| __ test_b(FieldOperand(temp, Map::kInstanceTypeOffset), mask); |
| DeoptimizeIf(tag == 0 ? not_zero : zero, instr, "wrong instance type"); |
| } else { |
| __ movzx_b(temp, FieldOperand(temp, Map::kInstanceTypeOffset)); |
| __ and_(temp, mask); |
| __ cmp(temp, tag); |
| DeoptimizeIf(not_equal, instr, "wrong instance type"); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoCheckValue(LCheckValue* instr) { |
| Handle<HeapObject> object = instr->hydrogen()->object().handle(); |
| if (instr->hydrogen()->object_in_new_space()) { |
| Register reg = ToRegister(instr->value()); |
| Handle<Cell> cell = isolate()->factory()->NewCell(object); |
| __ cmp(reg, Operand::ForCell(cell)); |
| } else { |
| Operand operand = ToOperand(instr->value()); |
| __ cmp(operand, object); |
| } |
| DeoptimizeIf(not_equal, instr, "value mismatch"); |
| } |
| |
| |
| void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) { |
| { |
| PushSafepointRegistersScope scope(this); |
| __ push(object); |
| __ xor_(esi, esi); |
| __ CallRuntimeSaveDoubles(Runtime::kTryMigrateInstance); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 1, Safepoint::kNoLazyDeopt); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| } |
| DeoptimizeIf(zero, instr, "instance migration failed"); |
| } |
| |
| |
| void LCodeGen::DoCheckMaps(LCheckMaps* instr) { |
| class DeferredCheckMaps FINAL : public LDeferredCode { |
| public: |
| DeferredCheckMaps(LCodeGen* codegen, |
| LCheckMaps* instr, |
| Register object, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr), object_(object) { |
| SetExit(check_maps()); |
| } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredInstanceMigration(instr_, object_); |
| } |
| Label* check_maps() { return &check_maps_; } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LCheckMaps* instr_; |
| Label check_maps_; |
| Register object_; |
| }; |
| |
| if (instr->hydrogen()->IsStabilityCheck()) { |
| const UniqueSet<Map>* maps = instr->hydrogen()->maps(); |
| for (int i = 0; i < maps->size(); ++i) { |
| AddStabilityDependency(maps->at(i).handle()); |
| } |
| return; |
| } |
| |
| LOperand* input = instr->value(); |
| DCHECK(input->IsRegister()); |
| Register reg = ToRegister(input); |
| |
| DeferredCheckMaps* deferred = NULL; |
| if (instr->hydrogen()->HasMigrationTarget()) { |
| deferred = new(zone()) DeferredCheckMaps(this, instr, reg, x87_stack_); |
| __ bind(deferred->check_maps()); |
| } |
| |
| const UniqueSet<Map>* maps = instr->hydrogen()->maps(); |
| Label success; |
| for (int i = 0; i < maps->size() - 1; i++) { |
| Handle<Map> map = maps->at(i).handle(); |
| __ CompareMap(reg, map); |
| __ j(equal, &success, Label::kNear); |
| } |
| |
| Handle<Map> map = maps->at(maps->size() - 1).handle(); |
| __ CompareMap(reg, map); |
| if (instr->hydrogen()->HasMigrationTarget()) { |
| __ j(not_equal, deferred->entry()); |
| } else { |
| DeoptimizeIf(not_equal, instr, "wrong map"); |
| } |
| |
| __ bind(&success); |
| } |
| |
| |
| void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) { |
| X87Register value_reg = ToX87Register(instr->unclamped()); |
| Register result_reg = ToRegister(instr->result()); |
| X87Fxch(value_reg); |
| __ ClampTOSToUint8(result_reg); |
| } |
| |
| |
| void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) { |
| DCHECK(instr->unclamped()->Equals(instr->result())); |
| Register value_reg = ToRegister(instr->result()); |
| __ ClampUint8(value_reg); |
| } |
| |
| |
| void LCodeGen::DoClampTToUint8NoSSE2(LClampTToUint8NoSSE2* instr) { |
| Register input_reg = ToRegister(instr->unclamped()); |
| Register result_reg = ToRegister(instr->result()); |
| Register scratch = ToRegister(instr->scratch()); |
| Register scratch2 = ToRegister(instr->scratch2()); |
| Register scratch3 = ToRegister(instr->scratch3()); |
| Label is_smi, done, heap_number, valid_exponent, |
| largest_value, zero_result, maybe_nan_or_infinity; |
| |
| __ JumpIfSmi(input_reg, &is_smi); |
| |
| // Check for heap number |
| __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| __ j(equal, &heap_number, Label::kNear); |
| |
| // Check for undefined. Undefined is converted to zero for clamping |
| // conversions. |
| __ cmp(input_reg, factory()->undefined_value()); |
| DeoptimizeIf(not_equal, instr, "not a heap number/undefined"); |
| __ jmp(&zero_result, Label::kNear); |
| |
| // Heap number |
| __ bind(&heap_number); |
| |
| // Surprisingly, all of the hand-crafted bit-manipulations below are much |
| // faster than the x86 FPU built-in instruction, especially since "banker's |
| // rounding" would be additionally very expensive |
| |
| // Get exponent word. |
| __ mov(scratch, FieldOperand(input_reg, HeapNumber::kExponentOffset)); |
| __ mov(scratch3, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| |
| // Test for negative values --> clamp to zero |
| __ test(scratch, scratch); |
| __ j(negative, &zero_result, Label::kNear); |
| |
| // Get exponent alone in scratch2. |
| __ mov(scratch2, scratch); |
| __ and_(scratch2, HeapNumber::kExponentMask); |
| __ shr(scratch2, HeapNumber::kExponentShift); |
| __ j(zero, &zero_result, Label::kNear); |
| __ sub(scratch2, Immediate(HeapNumber::kExponentBias - 1)); |
| __ j(negative, &zero_result, Label::kNear); |
| |
| const uint32_t non_int8_exponent = 7; |
| __ cmp(scratch2, Immediate(non_int8_exponent + 1)); |
| // If the exponent is too big, check for special values. |
| __ j(greater, &maybe_nan_or_infinity, Label::kNear); |
| |
| __ bind(&valid_exponent); |
| // Exponent word in scratch, exponent in scratch2. We know that 0 <= exponent |
| // < 7. The shift bias is the number of bits to shift the mantissa such that |
| // with an exponent of 7 such the that top-most one is in bit 30, allowing |
| // detection the rounding overflow of a 255.5 to 256 (bit 31 goes from 0 to |
| // 1). |
| int shift_bias = (30 - HeapNumber::kExponentShift) - 7 - 1; |
| __ lea(result_reg, MemOperand(scratch2, shift_bias)); |
| // Here result_reg (ecx) is the shift, scratch is the exponent word. Get the |
| // top bits of the mantissa. |
| __ and_(scratch, HeapNumber::kMantissaMask); |
| // Put back the implicit 1 of the mantissa |
| __ or_(scratch, 1 << HeapNumber::kExponentShift); |
| // Shift up to round |
| __ shl_cl(scratch); |
| // Use "banker's rounding" to spec: If fractional part of number is 0.5, then |
| // use the bit in the "ones" place and add it to the "halves" place, which has |
| // the effect of rounding to even. |
| __ mov(scratch2, scratch); |
| const uint32_t one_half_bit_shift = 30 - sizeof(uint8_t) * 8; |
| const uint32_t one_bit_shift = one_half_bit_shift + 1; |
| __ and_(scratch2, Immediate((1 << one_bit_shift) - 1)); |
| __ cmp(scratch2, Immediate(1 << one_half_bit_shift)); |
| Label no_round; |
| __ j(less, &no_round, Label::kNear); |
| Label round_up; |
| __ mov(scratch2, Immediate(1 << one_half_bit_shift)); |
| __ j(greater, &round_up, Label::kNear); |
| __ test(scratch3, scratch3); |
| __ j(not_zero, &round_up, Label::kNear); |
| __ mov(scratch2, scratch); |
| __ and_(scratch2, Immediate(1 << one_bit_shift)); |
| __ shr(scratch2, 1); |
| __ bind(&round_up); |
| __ add(scratch, scratch2); |
| __ j(overflow, &largest_value, Label::kNear); |
| __ bind(&no_round); |
| __ shr(scratch, 23); |
| __ mov(result_reg, scratch); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&maybe_nan_or_infinity); |
| // Check for NaN/Infinity, all other values map to 255 |
| __ cmp(scratch2, Immediate(HeapNumber::kInfinityOrNanExponent + 1)); |
| __ j(not_equal, &largest_value, Label::kNear); |
| |
| // Check for NaN, which differs from Infinity in that at least one mantissa |
| // bit is set. |
| __ and_(scratch, HeapNumber::kMantissaMask); |
| __ or_(scratch, FieldOperand(input_reg, HeapNumber::kMantissaOffset)); |
| __ j(not_zero, &zero_result, Label::kNear); // M!=0 --> NaN |
| // Infinity -> Fall through to map to 255. |
| |
| __ bind(&largest_value); |
| __ mov(result_reg, Immediate(255)); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&zero_result); |
| __ xor_(result_reg, result_reg); |
| __ jmp(&done, Label::kNear); |
| |
| // smi |
| __ bind(&is_smi); |
| if (!input_reg.is(result_reg)) { |
| __ mov(result_reg, input_reg); |
| } |
| __ SmiUntag(result_reg); |
| __ ClampUint8(result_reg); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDoubleBits(LDoubleBits* instr) { |
| X87Register value_reg = ToX87Register(instr->value()); |
| Register result_reg = ToRegister(instr->result()); |
| X87Fxch(value_reg); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ fst_d(Operand(esp, 0)); |
| if (instr->hydrogen()->bits() == HDoubleBits::HIGH) { |
| __ mov(result_reg, Operand(esp, kPointerSize)); |
| } else { |
| __ mov(result_reg, Operand(esp, 0)); |
| } |
| __ add(esp, Immediate(kDoubleSize)); |
| } |
| |
| |
| void LCodeGen::DoConstructDouble(LConstructDouble* instr) { |
| Register hi_reg = ToRegister(instr->hi()); |
| Register lo_reg = ToRegister(instr->lo()); |
| X87Register result_reg = ToX87Register(instr->result()); |
| // Follow below pattern to write a x87 fp register. |
| X87PrepareToWrite(result_reg); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ mov(Operand(esp, 0), lo_reg); |
| __ mov(Operand(esp, kPointerSize), hi_reg); |
| __ fld_d(Operand(esp, 0)); |
| __ add(esp, Immediate(kDoubleSize)); |
| X87CommitWrite(result_reg); |
| } |
| |
| |
| void LCodeGen::DoAllocate(LAllocate* instr) { |
| class DeferredAllocate FINAL : public LDeferredCode { |
| public: |
| DeferredAllocate(LCodeGen* codegen, |
| LAllocate* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { codegen()->DoDeferredAllocate(instr_); } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LAllocate* instr_; |
| }; |
| |
| DeferredAllocate* deferred = |
| new(zone()) DeferredAllocate(this, instr, x87_stack_); |
| |
| Register result = ToRegister(instr->result()); |
| Register temp = ToRegister(instr->temp()); |
| |
| // Allocate memory for the object. |
| AllocationFlags flags = TAG_OBJECT; |
| if (instr->hydrogen()->MustAllocateDoubleAligned()) { |
| flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT); |
| } |
| if (instr->hydrogen()->IsOldPointerSpaceAllocation()) { |
| DCHECK(!instr->hydrogen()->IsOldDataSpaceAllocation()); |
| DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE); |
| } else if (instr->hydrogen()->IsOldDataSpaceAllocation()) { |
| DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_DATA_SPACE); |
| } |
| |
| if (instr->size()->IsConstantOperand()) { |
| int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| if (size <= Page::kMaxRegularHeapObjectSize) { |
| __ Allocate(size, result, temp, no_reg, deferred->entry(), flags); |
| } else { |
| __ jmp(deferred->entry()); |
| } |
| } else { |
| Register size = ToRegister(instr->size()); |
| __ Allocate(size, result, temp, no_reg, deferred->entry(), flags); |
| } |
| |
| __ bind(deferred->exit()); |
| |
| if (instr->hydrogen()->MustPrefillWithFiller()) { |
| if (instr->size()->IsConstantOperand()) { |
| int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| __ mov(temp, (size / kPointerSize) - 1); |
| } else { |
| temp = ToRegister(instr->size()); |
| __ shr(temp, kPointerSizeLog2); |
| __ dec(temp); |
| } |
| Label loop; |
| __ bind(&loop); |
| __ mov(FieldOperand(result, temp, times_pointer_size, 0), |
| isolate()->factory()->one_pointer_filler_map()); |
| __ dec(temp); |
| __ j(not_zero, &loop); |
| } |
| } |
| |
| |
| void LCodeGen::DoDeferredAllocate(LAllocate* instr) { |
| Register result = ToRegister(instr->result()); |
| |
| // TODO(3095996): Get rid of this. For now, we need to make the |
| // result register contain a valid pointer because it is already |
| // contained in the register pointer map. |
| __ Move(result, Immediate(Smi::FromInt(0))); |
| |
| PushSafepointRegistersScope scope(this); |
| if (instr->size()->IsRegister()) { |
| Register size = ToRegister(instr->size()); |
| DCHECK(!size.is(result)); |
| __ SmiTag(ToRegister(instr->size())); |
| __ push(size); |
| } else { |
| int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| if (size >= 0 && size <= Smi::kMaxValue) { |
| __ push(Immediate(Smi::FromInt(size))); |
| } else { |
| // We should never get here at runtime => abort |
| __ int3(); |
| return; |
| } |
| } |
| |
| int flags = AllocateDoubleAlignFlag::encode( |
| instr->hydrogen()->MustAllocateDoubleAligned()); |
| if (instr->hydrogen()->IsOldPointerSpaceAllocation()) { |
| DCHECK(!instr->hydrogen()->IsOldDataSpaceAllocation()); |
| DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| flags = AllocateTargetSpace::update(flags, OLD_POINTER_SPACE); |
| } else if (instr->hydrogen()->IsOldDataSpaceAllocation()) { |
| DCHECK(!instr->hydrogen()->IsNewSpaceAllocation()); |
| flags = AllocateTargetSpace::update(flags, OLD_DATA_SPACE); |
| } else { |
| flags = AllocateTargetSpace::update(flags, NEW_SPACE); |
| } |
| __ push(Immediate(Smi::FromInt(flags))); |
| |
| CallRuntimeFromDeferred( |
| Runtime::kAllocateInTargetSpace, 2, instr, instr->context()); |
| __ StoreToSafepointRegisterSlot(result, eax); |
| } |
| |
| |
| void LCodeGen::DoToFastProperties(LToFastProperties* instr) { |
| DCHECK(ToRegister(instr->value()).is(eax)); |
| __ push(eax); |
| CallRuntime(Runtime::kToFastProperties, 1, instr); |
| } |
| |
| |
| void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| Label materialized; |
| // Registers will be used as follows: |
| // ecx = literals array. |
| // ebx = regexp literal. |
| // eax = regexp literal clone. |
| // esi = context. |
| int literal_offset = |
| FixedArray::OffsetOfElementAt(instr->hydrogen()->literal_index()); |
| __ LoadHeapObject(ecx, instr->hydrogen()->literals()); |
| __ mov(ebx, FieldOperand(ecx, literal_offset)); |
| __ cmp(ebx, factory()->undefined_value()); |
| __ j(not_equal, &materialized, Label::kNear); |
| |
| // Create regexp literal using runtime function |
| // Result will be in eax. |
| __ push(ecx); |
| __ push(Immediate(Smi::FromInt(instr->hydrogen()->literal_index()))); |
| __ push(Immediate(instr->hydrogen()->pattern())); |
| __ push(Immediate(instr->hydrogen()->flags())); |
| CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr); |
| __ mov(ebx, eax); |
| |
| __ bind(&materialized); |
| int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize; |
| Label allocated, runtime_allocate; |
| __ Allocate(size, eax, ecx, edx, &runtime_allocate, TAG_OBJECT); |
| __ jmp(&allocated, Label::kNear); |
| |
| __ bind(&runtime_allocate); |
| __ push(ebx); |
| __ push(Immediate(Smi::FromInt(size))); |
| CallRuntime(Runtime::kAllocateInNewSpace, 1, instr); |
| __ pop(ebx); |
| |
| __ bind(&allocated); |
| // Copy the content into the newly allocated memory. |
| // (Unroll copy loop once for better throughput). |
| for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) { |
| __ mov(edx, FieldOperand(ebx, i)); |
| __ mov(ecx, FieldOperand(ebx, i + kPointerSize)); |
| __ mov(FieldOperand(eax, i), edx); |
| __ mov(FieldOperand(eax, i + kPointerSize), ecx); |
| } |
| if ((size % (2 * kPointerSize)) != 0) { |
| __ mov(edx, FieldOperand(ebx, size - kPointerSize)); |
| __ mov(FieldOperand(eax, size - kPointerSize), edx); |
| } |
| } |
| |
| |
| void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| // Use the fast case closure allocation code that allocates in new |
| // space for nested functions that don't need literals cloning. |
| bool pretenure = instr->hydrogen()->pretenure(); |
| if (!pretenure && instr->hydrogen()->has_no_literals()) { |
| FastNewClosureStub stub(isolate(), instr->hydrogen()->strict_mode(), |
| instr->hydrogen()->kind()); |
| __ mov(ebx, Immediate(instr->hydrogen()->shared_info())); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } else { |
| __ push(esi); |
| __ push(Immediate(instr->hydrogen()->shared_info())); |
| __ push(Immediate(pretenure ? factory()->true_value() |
| : factory()->false_value())); |
| CallRuntime(Runtime::kNewClosure, 3, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoTypeof(LTypeof* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| LOperand* input = instr->value(); |
| EmitPushTaggedOperand(input); |
| CallRuntime(Runtime::kTypeof, 1, instr); |
| } |
| |
| |
| void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Condition final_branch_condition = EmitTypeofIs(instr, input); |
| if (final_branch_condition != no_condition) { |
| EmitBranch(instr, final_branch_condition); |
| } |
| } |
| |
| |
| Condition LCodeGen::EmitTypeofIs(LTypeofIsAndBranch* instr, Register input) { |
| Label* true_label = instr->TrueLabel(chunk_); |
| Label* false_label = instr->FalseLabel(chunk_); |
| Handle<String> type_name = instr->type_literal(); |
| int left_block = instr->TrueDestination(chunk_); |
| int right_block = instr->FalseDestination(chunk_); |
| int next_block = GetNextEmittedBlock(); |
| |
| Label::Distance true_distance = left_block == next_block ? Label::kNear |
| : Label::kFar; |
| Label::Distance false_distance = right_block == next_block ? Label::kNear |
| : Label::kFar; |
| Condition final_branch_condition = no_condition; |
| if (String::Equals(type_name, factory()->number_string())) { |
| __ JumpIfSmi(input, true_label, true_distance); |
| __ cmp(FieldOperand(input, HeapObject::kMapOffset), |
| factory()->heap_number_map()); |
| final_branch_condition = equal; |
| |
| } else if (String::Equals(type_name, factory()->string_string())) { |
| __ JumpIfSmi(input, false_label, false_distance); |
| __ CmpObjectType(input, FIRST_NONSTRING_TYPE, input); |
| __ j(above_equal, false_label, false_distance); |
| __ test_b(FieldOperand(input, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| final_branch_condition = zero; |
| |
| } else if (String::Equals(type_name, factory()->symbol_string())) { |
| __ JumpIfSmi(input, false_label, false_distance); |
| __ CmpObjectType(input, SYMBOL_TYPE, input); |
| final_branch_condition = equal; |
| |
| } else if (String::Equals(type_name, factory()->boolean_string())) { |
| __ cmp(input, factory()->true_value()); |
| __ j(equal, true_label, true_distance); |
| __ cmp(input, factory()->false_value()); |
| final_branch_condition = equal; |
| |
| } else if (String::Equals(type_name, factory()->undefined_string())) { |
| __ cmp(input, factory()->undefined_value()); |
| __ j(equal, true_label, true_distance); |
| __ JumpIfSmi(input, false_label, false_distance); |
| // Check for undetectable objects => true. |
| __ mov(input, FieldOperand(input, HeapObject::kMapOffset)); |
| __ test_b(FieldOperand(input, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| final_branch_condition = not_zero; |
| |
| } else if (String::Equals(type_name, factory()->function_string())) { |
| STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
| __ JumpIfSmi(input, false_label, false_distance); |
| __ CmpObjectType(input, JS_FUNCTION_TYPE, input); |
| __ j(equal, true_label, true_distance); |
| __ CmpInstanceType(input, JS_FUNCTION_PROXY_TYPE); |
| final_branch_condition = equal; |
| |
| } else if (String::Equals(type_name, factory()->object_string())) { |
| __ JumpIfSmi(input, false_label, false_distance); |
| __ cmp(input, factory()->null_value()); |
| __ j(equal, true_label, true_distance); |
| __ CmpObjectType(input, FIRST_NONCALLABLE_SPEC_OBJECT_TYPE, input); |
| __ j(below, false_label, false_distance); |
| __ CmpInstanceType(input, LAST_NONCALLABLE_SPEC_OBJECT_TYPE); |
| __ j(above, false_label, false_distance); |
| // Check for undetectable objects => false. |
| __ test_b(FieldOperand(input, Map::kBitFieldOffset), |
| 1 << Map::kIsUndetectable); |
| final_branch_condition = zero; |
| |
| } else { |
| __ jmp(false_label, false_distance); |
| } |
| return final_branch_condition; |
| } |
| |
| |
| void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) { |
| Register temp = ToRegister(instr->temp()); |
| |
| EmitIsConstructCall(temp); |
| EmitBranch(instr, equal); |
| } |
| |
| |
| void LCodeGen::EmitIsConstructCall(Register temp) { |
| // Get the frame pointer for the calling frame. |
| __ mov(temp, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Skip the arguments adaptor frame if it exists. |
| Label check_frame_marker; |
| __ cmp(Operand(temp, StandardFrameConstants::kContextOffset), |
| Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ j(not_equal, &check_frame_marker, Label::kNear); |
| __ mov(temp, Operand(temp, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Check the marker in the calling frame. |
| __ bind(&check_frame_marker); |
| __ cmp(Operand(temp, StandardFrameConstants::kMarkerOffset), |
| Immediate(Smi::FromInt(StackFrame::CONSTRUCT))); |
| } |
| |
| |
| void LCodeGen::EnsureSpaceForLazyDeopt(int space_needed) { |
| if (!info()->IsStub()) { |
| // Ensure that we have enough space after the previous lazy-bailout |
| // instruction for patching the code here. |
| int current_pc = masm()->pc_offset(); |
| if (current_pc < last_lazy_deopt_pc_ + space_needed) { |
| int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; |
| __ Nop(padding_size); |
| } |
| } |
| last_lazy_deopt_pc_ = masm()->pc_offset(); |
| } |
| |
| |
| void LCodeGen::DoLazyBailout(LLazyBailout* instr) { |
| last_lazy_deopt_pc_ = masm()->pc_offset(); |
| DCHECK(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| } |
| |
| |
| void LCodeGen::DoDeoptimize(LDeoptimize* instr) { |
| Deoptimizer::BailoutType type = instr->hydrogen()->type(); |
| // TODO(danno): Stubs expect all deopts to be lazy for historical reasons (the |
| // needed return address), even though the implementation of LAZY and EAGER is |
| // now identical. When LAZY is eventually completely folded into EAGER, remove |
| // the special case below. |
| if (info()->IsStub() && type == Deoptimizer::EAGER) { |
| type = Deoptimizer::LAZY; |
| } |
| DeoptimizeIf(no_condition, instr, instr->hydrogen()->reason(), type); |
| } |
| |
| |
| void LCodeGen::DoDummy(LDummy* instr) { |
| // Nothing to see here, move on! |
| } |
| |
| |
| void LCodeGen::DoDummyUse(LDummyUse* instr) { |
| // Nothing to see here, move on! |
| } |
| |
| |
| void LCodeGen::DoDeferredStackCheck(LStackCheck* instr) { |
| PushSafepointRegistersScope scope(this); |
| __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| __ CallRuntimeSaveDoubles(Runtime::kStackGuard); |
| RecordSafepointWithLazyDeopt( |
| instr, RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| DCHECK(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| } |
| |
| |
| void LCodeGen::DoStackCheck(LStackCheck* instr) { |
| class DeferredStackCheck FINAL : public LDeferredCode { |
| public: |
| DeferredStackCheck(LCodeGen* codegen, |
| LStackCheck* instr, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), instr_(instr) { } |
| void Generate() OVERRIDE { codegen()->DoDeferredStackCheck(instr_); } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LStackCheck* instr_; |
| }; |
| |
| DCHECK(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| // There is no LLazyBailout instruction for stack-checks. We have to |
| // prepare for lazy deoptimization explicitly here. |
| if (instr->hydrogen()->is_function_entry()) { |
| // Perform stack overflow check. |
| Label done; |
| ExternalReference stack_limit = |
| ExternalReference::address_of_stack_limit(isolate()); |
| __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| __ j(above_equal, &done, Label::kNear); |
| |
| DCHECK(instr->context()->IsRegister()); |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| CallCode(isolate()->builtins()->StackCheck(), |
| RelocInfo::CODE_TARGET, |
| instr); |
| __ bind(&done); |
| } else { |
| DCHECK(instr->hydrogen()->is_backwards_branch()); |
| // Perform stack overflow check if this goto needs it before jumping. |
| DeferredStackCheck* deferred_stack_check = |
| new(zone()) DeferredStackCheck(this, instr, x87_stack_); |
| ExternalReference stack_limit = |
| ExternalReference::address_of_stack_limit(isolate()); |
| __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| __ j(below, deferred_stack_check->entry()); |
| EnsureSpaceForLazyDeopt(Deoptimizer::patch_size()); |
| __ bind(instr->done_label()); |
| deferred_stack_check->SetExit(instr->done_label()); |
| RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| // Don't record a deoptimization index for the safepoint here. |
| // This will be done explicitly when emitting call and the safepoint in |
| // the deferred code. |
| } |
| } |
| |
| |
| void LCodeGen::DoOsrEntry(LOsrEntry* instr) { |
| // This is a pseudo-instruction that ensures that the environment here is |
| // properly registered for deoptimization and records the assembler's PC |
| // offset. |
| LEnvironment* environment = instr->environment(); |
| |
| // If the environment were already registered, we would have no way of |
| // backpatching it with the spill slot operands. |
| DCHECK(!environment->HasBeenRegistered()); |
| RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); |
| |
| GenerateOsrPrologue(); |
| } |
| |
| |
| void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) { |
| DCHECK(ToRegister(instr->context()).is(esi)); |
| __ cmp(eax, isolate()->factory()->undefined_value()); |
| DeoptimizeIf(equal, instr, "undefined"); |
| |
| __ cmp(eax, isolate()->factory()->null_value()); |
| DeoptimizeIf(equal, instr, "null"); |
| |
| __ test(eax, Immediate(kSmiTagMask)); |
| DeoptimizeIf(zero, instr, "Smi"); |
| |
| STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE); |
| __ CmpObjectType(eax, LAST_JS_PROXY_TYPE, ecx); |
| DeoptimizeIf(below_equal, instr, "wrong instance type"); |
| |
| Label use_cache, call_runtime; |
| __ CheckEnumCache(&call_runtime); |
| |
| __ mov(eax, FieldOperand(eax, HeapObject::kMapOffset)); |
| __ jmp(&use_cache, Label::kNear); |
| |
| // Get the set of properties to enumerate. |
| __ bind(&call_runtime); |
| __ push(eax); |
| CallRuntime(Runtime::kGetPropertyNamesFast, 1, instr); |
| |
| __ cmp(FieldOperand(eax, HeapObject::kMapOffset), |
| isolate()->factory()->meta_map()); |
| DeoptimizeIf(not_equal, instr, "wrong map"); |
| __ bind(&use_cache); |
| } |
| |
| |
| void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) { |
| Register map = ToRegister(instr->map()); |
| Register result = ToRegister(instr->result()); |
| Label load_cache, done; |
| __ EnumLength(result, map); |
| __ cmp(result, Immediate(Smi::FromInt(0))); |
| __ j(not_equal, &load_cache, Label::kNear); |
| __ mov(result, isolate()->factory()->empty_fixed_array()); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&load_cache); |
| __ LoadInstanceDescriptors(map, result); |
| __ mov(result, |
| FieldOperand(result, DescriptorArray::kEnumCacheOffset)); |
| __ mov(result, |
| FieldOperand(result, FixedArray::SizeFor(instr->idx()))); |
| __ bind(&done); |
| __ test(result, result); |
| DeoptimizeIf(equal, instr, "no cache"); |
| } |
| |
| |
| void LCodeGen::DoCheckMapValue(LCheckMapValue* instr) { |
| Register object = ToRegister(instr->value()); |
| __ cmp(ToRegister(instr->map()), |
| FieldOperand(object, HeapObject::kMapOffset)); |
| DeoptimizeIf(not_equal, instr, "wrong map"); |
| } |
| |
| |
| void LCodeGen::DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr, |
| Register object, |
| Register index) { |
| PushSafepointRegistersScope scope(this); |
| __ push(object); |
| __ push(index); |
| __ xor_(esi, esi); |
| __ CallRuntimeSaveDoubles(Runtime::kLoadMutableDouble); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 2, Safepoint::kNoLazyDeopt); |
| __ StoreToSafepointRegisterSlot(object, eax); |
| } |
| |
| |
| void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) { |
| class DeferredLoadMutableDouble FINAL : public LDeferredCode { |
| public: |
| DeferredLoadMutableDouble(LCodeGen* codegen, |
| LLoadFieldByIndex* instr, |
| Register object, |
| Register index, |
| const X87Stack& x87_stack) |
| : LDeferredCode(codegen, x87_stack), |
| instr_(instr), |
| object_(object), |
| index_(index) { |
| } |
| void Generate() OVERRIDE { |
| codegen()->DoDeferredLoadMutableDouble(instr_, object_, index_); |
| } |
| LInstruction* instr() OVERRIDE { return instr_; } |
| |
| private: |
| LLoadFieldByIndex* instr_; |
| Register object_; |
| Register index_; |
| }; |
| |
| Register object = ToRegister(instr->object()); |
| Register index = ToRegister(instr->index()); |
| |
| DeferredLoadMutableDouble* deferred; |
| deferred = new(zone()) DeferredLoadMutableDouble( |
| this, instr, object, index, x87_stack_); |
| |
| Label out_of_object, done; |
| __ test(index, Immediate(Smi::FromInt(1))); |
| __ j(not_zero, deferred->entry()); |
| |
| __ sar(index, 1); |
| |
| __ cmp(index, Immediate(0)); |
| __ j(less, &out_of_object, Label::kNear); |
| __ mov(object, FieldOperand(object, |
| index, |
| times_half_pointer_size, |
| JSObject::kHeaderSize)); |
| __ jmp(&done, Label::kNear); |
| |
| __ bind(&out_of_object); |
| __ mov(object, FieldOperand(object, JSObject::kPropertiesOffset)); |
| __ neg(index); |
| // Index is now equal to out of object property index plus 1. |
| __ mov(object, FieldOperand(object, |
| index, |
| times_half_pointer_size, |
| FixedArray::kHeaderSize - kPointerSize)); |
| __ bind(deferred->exit()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) { |
| Register context = ToRegister(instr->context()); |
| __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context); |
| } |
| |
| |
| void LCodeGen::DoAllocateBlockContext(LAllocateBlockContext* instr) { |
| Handle<ScopeInfo> scope_info = instr->scope_info(); |
| __ Push(scope_info); |
| __ push(ToRegister(instr->function())); |
| CallRuntime(Runtime::kPushBlockContext, 2, instr); |
| RecordSafepoint(Safepoint::kNoLazyDeopt); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_X87 |