| // Copyright 2013 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/compiler/code-generator.h" |
| |
| #include "src/ast/scopes.h" |
| #include "src/compiler/code-generator-impl.h" |
| #include "src/compiler/gap-resolver.h" |
| #include "src/compiler/node-matchers.h" |
| #include "src/compiler/osr.h" |
| #include "src/ia32/assembler-ia32.h" |
| #include "src/ia32/frames-ia32.h" |
| #include "src/ia32/macro-assembler-ia32.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| #define __ masm()-> |
| |
| |
| #define kScratchDoubleReg xmm0 |
| |
| |
| // Adds IA-32 specific methods for decoding operands. |
| class IA32OperandConverter : public InstructionOperandConverter { |
| public: |
| IA32OperandConverter(CodeGenerator* gen, Instruction* instr) |
| : InstructionOperandConverter(gen, instr) {} |
| |
| Operand InputOperand(size_t index, int extra = 0) { |
| return ToOperand(instr_->InputAt(index), extra); |
| } |
| |
| Immediate InputImmediate(size_t index) { |
| return ToImmediate(instr_->InputAt(index)); |
| } |
| |
| Operand OutputOperand() { return ToOperand(instr_->Output()); } |
| |
| Operand ToOperand(InstructionOperand* op, int extra = 0) { |
| if (op->IsRegister()) { |
| DCHECK(extra == 0); |
| return Operand(ToRegister(op)); |
| } else if (op->IsDoubleRegister()) { |
| DCHECK(extra == 0); |
| return Operand(ToDoubleRegister(op)); |
| } |
| DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot()); |
| FrameOffset offset = frame_access_state()->GetFrameOffset( |
| AllocatedOperand::cast(op)->index()); |
| return Operand(offset.from_stack_pointer() ? esp : ebp, |
| offset.offset() + extra); |
| } |
| |
| Operand ToMaterializableOperand(int materializable_offset) { |
| FrameOffset offset = frame_access_state()->GetFrameOffset( |
| Frame::FPOffsetToSlot(materializable_offset)); |
| return Operand(offset.from_stack_pointer() ? esp : ebp, offset.offset()); |
| } |
| |
| Operand HighOperand(InstructionOperand* op) { |
| DCHECK(op->IsDoubleStackSlot()); |
| return ToOperand(op, kPointerSize); |
| } |
| |
| Immediate ToImmediate(InstructionOperand* operand) { |
| Constant constant = ToConstant(operand); |
| switch (constant.type()) { |
| case Constant::kInt32: |
| return Immediate(constant.ToInt32()); |
| case Constant::kFloat32: |
| return Immediate( |
| isolate()->factory()->NewNumber(constant.ToFloat32(), TENURED)); |
| case Constant::kFloat64: |
| return Immediate( |
| isolate()->factory()->NewNumber(constant.ToFloat64(), TENURED)); |
| case Constant::kExternalReference: |
| return Immediate(constant.ToExternalReference()); |
| case Constant::kHeapObject: |
| return Immediate(constant.ToHeapObject()); |
| case Constant::kInt64: |
| break; |
| case Constant::kRpoNumber: |
| return Immediate::CodeRelativeOffset(ToLabel(operand)); |
| } |
| UNREACHABLE(); |
| return Immediate(-1); |
| } |
| |
| static size_t NextOffset(size_t* offset) { |
| size_t i = *offset; |
| (*offset)++; |
| return i; |
| } |
| |
| static ScaleFactor ScaleFor(AddressingMode one, AddressingMode mode) { |
| STATIC_ASSERT(0 == static_cast<int>(times_1)); |
| STATIC_ASSERT(1 == static_cast<int>(times_2)); |
| STATIC_ASSERT(2 == static_cast<int>(times_4)); |
| STATIC_ASSERT(3 == static_cast<int>(times_8)); |
| int scale = static_cast<int>(mode - one); |
| DCHECK(scale >= 0 && scale < 4); |
| return static_cast<ScaleFactor>(scale); |
| } |
| |
| Operand MemoryOperand(size_t* offset) { |
| AddressingMode mode = AddressingModeField::decode(instr_->opcode()); |
| switch (mode) { |
| case kMode_MR: { |
| Register base = InputRegister(NextOffset(offset)); |
| int32_t disp = 0; |
| return Operand(base, disp); |
| } |
| case kMode_MRI: { |
| Register base = InputRegister(NextOffset(offset)); |
| int32_t disp = InputInt32(NextOffset(offset)); |
| return Operand(base, disp); |
| } |
| case kMode_MR1: |
| case kMode_MR2: |
| case kMode_MR4: |
| case kMode_MR8: { |
| Register base = InputRegister(NextOffset(offset)); |
| Register index = InputRegister(NextOffset(offset)); |
| ScaleFactor scale = ScaleFor(kMode_MR1, mode); |
| int32_t disp = 0; |
| return Operand(base, index, scale, disp); |
| } |
| case kMode_MR1I: |
| case kMode_MR2I: |
| case kMode_MR4I: |
| case kMode_MR8I: { |
| Register base = InputRegister(NextOffset(offset)); |
| Register index = InputRegister(NextOffset(offset)); |
| ScaleFactor scale = ScaleFor(kMode_MR1I, mode); |
| int32_t disp = InputInt32(NextOffset(offset)); |
| return Operand(base, index, scale, disp); |
| } |
| case kMode_M1: |
| case kMode_M2: |
| case kMode_M4: |
| case kMode_M8: { |
| Register index = InputRegister(NextOffset(offset)); |
| ScaleFactor scale = ScaleFor(kMode_M1, mode); |
| int32_t disp = 0; |
| return Operand(index, scale, disp); |
| } |
| case kMode_M1I: |
| case kMode_M2I: |
| case kMode_M4I: |
| case kMode_M8I: { |
| Register index = InputRegister(NextOffset(offset)); |
| ScaleFactor scale = ScaleFor(kMode_M1I, mode); |
| int32_t disp = InputInt32(NextOffset(offset)); |
| return Operand(index, scale, disp); |
| } |
| case kMode_MI: { |
| int32_t disp = InputInt32(NextOffset(offset)); |
| return Operand(Immediate(disp)); |
| } |
| case kMode_None: |
| UNREACHABLE(); |
| return Operand(no_reg, 0); |
| } |
| UNREACHABLE(); |
| return Operand(no_reg, 0); |
| } |
| |
| Operand MemoryOperand(size_t first_input = 0) { |
| return MemoryOperand(&first_input); |
| } |
| }; |
| |
| |
| namespace { |
| |
| bool HasImmediateInput(Instruction* instr, size_t index) { |
| return instr->InputAt(index)->IsImmediate(); |
| } |
| |
| |
| class OutOfLineLoadInteger final : public OutOfLineCode { |
| public: |
| OutOfLineLoadInteger(CodeGenerator* gen, Register result) |
| : OutOfLineCode(gen), result_(result) {} |
| |
| void Generate() final { __ xor_(result_, result_); } |
| |
| private: |
| Register const result_; |
| }; |
| |
| |
| class OutOfLineLoadFloat final : public OutOfLineCode { |
| public: |
| OutOfLineLoadFloat(CodeGenerator* gen, XMMRegister result) |
| : OutOfLineCode(gen), result_(result) {} |
| |
| void Generate() final { __ pcmpeqd(result_, result_); } |
| |
| private: |
| XMMRegister const result_; |
| }; |
| |
| |
| class OutOfLineTruncateDoubleToI final : public OutOfLineCode { |
| public: |
| OutOfLineTruncateDoubleToI(CodeGenerator* gen, Register result, |
| XMMRegister input) |
| : OutOfLineCode(gen), result_(result), input_(input) {} |
| |
| void Generate() final { |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movsd(MemOperand(esp, 0), input_); |
| __ SlowTruncateToI(result_, esp, 0); |
| __ add(esp, Immediate(kDoubleSize)); |
| } |
| |
| private: |
| Register const result_; |
| XMMRegister const input_; |
| }; |
| |
| |
| class OutOfLineRecordWrite final : public OutOfLineCode { |
| public: |
| OutOfLineRecordWrite(CodeGenerator* gen, Register object, Operand operand, |
| Register value, Register scratch0, Register scratch1, |
| RecordWriteMode mode) |
| : OutOfLineCode(gen), |
| object_(object), |
| operand_(operand), |
| value_(value), |
| scratch0_(scratch0), |
| scratch1_(scratch1), |
| mode_(mode) {} |
| |
| void Generate() final { |
| if (mode_ > RecordWriteMode::kValueIsPointer) { |
| __ JumpIfSmi(value_, exit()); |
| } |
| if (mode_ > RecordWriteMode::kValueIsMap) { |
| __ CheckPageFlag(value_, scratch0_, |
| MemoryChunk::kPointersToHereAreInterestingMask, zero, |
| exit()); |
| } |
| SaveFPRegsMode const save_fp_mode = |
| frame()->DidAllocateDoubleRegisters() ? kSaveFPRegs : kDontSaveFPRegs; |
| RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_, |
| EMIT_REMEMBERED_SET, save_fp_mode); |
| __ lea(scratch1_, operand_); |
| __ CallStub(&stub); |
| } |
| |
| private: |
| Register const object_; |
| Operand const operand_; |
| Register const value_; |
| Register const scratch0_; |
| Register const scratch1_; |
| RecordWriteMode const mode_; |
| }; |
| |
| } // namespace |
| |
| |
| #define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr) \ |
| do { \ |
| auto result = i.OutputDoubleRegister(); \ |
| auto offset = i.InputRegister(0); \ |
| if (instr->InputAt(1)->IsRegister()) { \ |
| __ cmp(offset, i.InputRegister(1)); \ |
| } else { \ |
| __ cmp(offset, i.InputImmediate(1)); \ |
| } \ |
| OutOfLineCode* ool = new (zone()) OutOfLineLoadFloat(this, result); \ |
| __ j(above_equal, ool->entry()); \ |
| __ asm_instr(result, i.MemoryOperand(2)); \ |
| __ bind(ool->exit()); \ |
| } while (false) |
| |
| |
| #define ASSEMBLE_CHECKED_LOAD_INTEGER(asm_instr) \ |
| do { \ |
| auto result = i.OutputRegister(); \ |
| auto offset = i.InputRegister(0); \ |
| if (instr->InputAt(1)->IsRegister()) { \ |
| __ cmp(offset, i.InputRegister(1)); \ |
| } else { \ |
| __ cmp(offset, i.InputImmediate(1)); \ |
| } \ |
| OutOfLineCode* ool = new (zone()) OutOfLineLoadInteger(this, result); \ |
| __ j(above_equal, ool->entry()); \ |
| __ asm_instr(result, i.MemoryOperand(2)); \ |
| __ bind(ool->exit()); \ |
| } while (false) |
| |
| |
| #define ASSEMBLE_CHECKED_STORE_FLOAT(asm_instr) \ |
| do { \ |
| auto offset = i.InputRegister(0); \ |
| if (instr->InputAt(1)->IsRegister()) { \ |
| __ cmp(offset, i.InputRegister(1)); \ |
| } else { \ |
| __ cmp(offset, i.InputImmediate(1)); \ |
| } \ |
| Label done; \ |
| __ j(above_equal, &done, Label::kNear); \ |
| __ asm_instr(i.MemoryOperand(3), i.InputDoubleRegister(2)); \ |
| __ bind(&done); \ |
| } while (false) |
| |
| |
| #define ASSEMBLE_CHECKED_STORE_INTEGER(asm_instr) \ |
| do { \ |
| auto offset = i.InputRegister(0); \ |
| if (instr->InputAt(1)->IsRegister()) { \ |
| __ cmp(offset, i.InputRegister(1)); \ |
| } else { \ |
| __ cmp(offset, i.InputImmediate(1)); \ |
| } \ |
| Label done; \ |
| __ j(above_equal, &done, Label::kNear); \ |
| if (instr->InputAt(2)->IsRegister()) { \ |
| __ asm_instr(i.MemoryOperand(3), i.InputRegister(2)); \ |
| } else { \ |
| __ asm_instr(i.MemoryOperand(3), i.InputImmediate(2)); \ |
| } \ |
| __ bind(&done); \ |
| } while (false) |
| |
| |
| void CodeGenerator::AssembleDeconstructActivationRecord(int stack_param_delta) { |
| int sp_slot_delta = TailCallFrameStackSlotDelta(stack_param_delta); |
| if (sp_slot_delta > 0) { |
| __ add(esp, Immediate(sp_slot_delta * kPointerSize)); |
| } |
| frame_access_state()->SetFrameAccessToDefault(); |
| } |
| |
| |
| void CodeGenerator::AssemblePrepareTailCall(int stack_param_delta) { |
| int sp_slot_delta = TailCallFrameStackSlotDelta(stack_param_delta); |
| if (sp_slot_delta < 0) { |
| __ sub(esp, Immediate(-sp_slot_delta * kPointerSize)); |
| frame_access_state()->IncreaseSPDelta(-sp_slot_delta); |
| } |
| if (frame()->needs_frame()) { |
| __ mov(ebp, MemOperand(ebp, 0)); |
| } |
| frame_access_state()->SetFrameAccessToSP(); |
| } |
| |
| |
| // Assembles an instruction after register allocation, producing machine code. |
| void CodeGenerator::AssembleArchInstruction(Instruction* instr) { |
| IA32OperandConverter i(this, instr); |
| |
| switch (ArchOpcodeField::decode(instr->opcode())) { |
| case kArchCallCodeObject: { |
| EnsureSpaceForLazyDeopt(); |
| if (HasImmediateInput(instr, 0)) { |
| Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0)); |
| __ call(code, RelocInfo::CODE_TARGET); |
| } else { |
| Register reg = i.InputRegister(0); |
| __ add(reg, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ call(reg); |
| } |
| RecordCallPosition(instr); |
| frame_access_state()->ClearSPDelta(); |
| break; |
| } |
| case kArchTailCallCodeObject: { |
| int stack_param_delta = i.InputInt32(instr->InputCount() - 1); |
| AssembleDeconstructActivationRecord(stack_param_delta); |
| if (HasImmediateInput(instr, 0)) { |
| Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0)); |
| __ jmp(code, RelocInfo::CODE_TARGET); |
| } else { |
| Register reg = i.InputRegister(0); |
| __ add(reg, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| __ jmp(reg); |
| } |
| frame_access_state()->ClearSPDelta(); |
| break; |
| } |
| case kArchCallJSFunction: { |
| EnsureSpaceForLazyDeopt(); |
| Register func = i.InputRegister(0); |
| if (FLAG_debug_code) { |
| // Check the function's context matches the context argument. |
| __ cmp(esi, FieldOperand(func, JSFunction::kContextOffset)); |
| __ Assert(equal, kWrongFunctionContext); |
| } |
| __ call(FieldOperand(func, JSFunction::kCodeEntryOffset)); |
| RecordCallPosition(instr); |
| frame_access_state()->ClearSPDelta(); |
| break; |
| } |
| case kArchTailCallJSFunction: { |
| Register func = i.InputRegister(0); |
| if (FLAG_debug_code) { |
| // Check the function's context matches the context argument. |
| __ cmp(esi, FieldOperand(func, JSFunction::kContextOffset)); |
| __ Assert(equal, kWrongFunctionContext); |
| } |
| int stack_param_delta = i.InputInt32(instr->InputCount() - 1); |
| AssembleDeconstructActivationRecord(stack_param_delta); |
| __ jmp(FieldOperand(func, JSFunction::kCodeEntryOffset)); |
| frame_access_state()->ClearSPDelta(); |
| break; |
| } |
| case kArchLazyBailout: { |
| EnsureSpaceForLazyDeopt(); |
| RecordCallPosition(instr); |
| break; |
| } |
| case kArchPrepareCallCFunction: { |
| // Frame alignment requires using FP-relative frame addressing. |
| frame_access_state()->SetFrameAccessToFP(); |
| int const num_parameters = MiscField::decode(instr->opcode()); |
| __ PrepareCallCFunction(num_parameters, i.TempRegister(0)); |
| break; |
| } |
| case kArchPrepareTailCall: |
| AssemblePrepareTailCall(i.InputInt32(instr->InputCount() - 1)); |
| break; |
| case kArchCallCFunction: { |
| int const num_parameters = MiscField::decode(instr->opcode()); |
| if (HasImmediateInput(instr, 0)) { |
| ExternalReference ref = i.InputExternalReference(0); |
| __ CallCFunction(ref, num_parameters); |
| } else { |
| Register func = i.InputRegister(0); |
| __ CallCFunction(func, num_parameters); |
| } |
| frame_access_state()->SetFrameAccessToDefault(); |
| frame_access_state()->ClearSPDelta(); |
| break; |
| } |
| case kArchJmp: |
| AssembleArchJump(i.InputRpo(0)); |
| break; |
| case kArchLookupSwitch: |
| AssembleArchLookupSwitch(instr); |
| break; |
| case kArchTableSwitch: |
| AssembleArchTableSwitch(instr); |
| break; |
| case kArchNop: |
| case kArchThrowTerminator: |
| // don't emit code for nops. |
| break; |
| case kArchDeoptimize: { |
| int deopt_state_id = |
| BuildTranslation(instr, -1, 0, OutputFrameStateCombine::Ignore()); |
| Deoptimizer::BailoutType bailout_type = |
| Deoptimizer::BailoutType(MiscField::decode(instr->opcode())); |
| AssembleDeoptimizerCall(deopt_state_id, bailout_type); |
| break; |
| } |
| case kArchRet: |
| AssembleReturn(); |
| break; |
| case kArchStackPointer: |
| __ mov(i.OutputRegister(), esp); |
| break; |
| case kArchFramePointer: |
| __ mov(i.OutputRegister(), ebp); |
| break; |
| case kArchTruncateDoubleToI: { |
| auto result = i.OutputRegister(); |
| auto input = i.InputDoubleRegister(0); |
| auto ool = new (zone()) OutOfLineTruncateDoubleToI(this, result, input); |
| __ cvttsd2si(result, Operand(input)); |
| __ cmp(result, 1); |
| __ j(overflow, ool->entry()); |
| __ bind(ool->exit()); |
| break; |
| } |
| case kArchStoreWithWriteBarrier: { |
| RecordWriteMode mode = |
| static_cast<RecordWriteMode>(MiscField::decode(instr->opcode())); |
| Register object = i.InputRegister(0); |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| Register value = i.InputRegister(index); |
| Register scratch0 = i.TempRegister(0); |
| Register scratch1 = i.TempRegister(1); |
| auto ool = new (zone()) OutOfLineRecordWrite(this, object, operand, value, |
| scratch0, scratch1, mode); |
| __ mov(operand, value); |
| __ CheckPageFlag(object, scratch0, |
| MemoryChunk::kPointersFromHereAreInterestingMask, |
| not_zero, ool->entry()); |
| __ bind(ool->exit()); |
| break; |
| } |
| case kIA32Add: |
| if (HasImmediateInput(instr, 1)) { |
| __ add(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ add(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32And: |
| if (HasImmediateInput(instr, 1)) { |
| __ and_(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ and_(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Cmp: |
| if (HasImmediateInput(instr, 1)) { |
| __ cmp(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ cmp(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Test: |
| if (HasImmediateInput(instr, 1)) { |
| __ test(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ test(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Imul: |
| if (HasImmediateInput(instr, 1)) { |
| __ imul(i.OutputRegister(), i.InputOperand(0), i.InputInt32(1)); |
| } else { |
| __ imul(i.OutputRegister(), i.InputOperand(1)); |
| } |
| break; |
| case kIA32ImulHigh: |
| __ imul(i.InputRegister(1)); |
| break; |
| case kIA32UmulHigh: |
| __ mul(i.InputRegister(1)); |
| break; |
| case kIA32Idiv: |
| __ cdq(); |
| __ idiv(i.InputOperand(1)); |
| break; |
| case kIA32Udiv: |
| __ Move(edx, Immediate(0)); |
| __ div(i.InputOperand(1)); |
| break; |
| case kIA32Not: |
| __ not_(i.OutputOperand()); |
| break; |
| case kIA32Neg: |
| __ neg(i.OutputOperand()); |
| break; |
| case kIA32Or: |
| if (HasImmediateInput(instr, 1)) { |
| __ or_(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ or_(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Xor: |
| if (HasImmediateInput(instr, 1)) { |
| __ xor_(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ xor_(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Sub: |
| if (HasImmediateInput(instr, 1)) { |
| __ sub(i.InputOperand(0), i.InputImmediate(1)); |
| } else { |
| __ sub(i.InputRegister(0), i.InputOperand(1)); |
| } |
| break; |
| case kIA32Shl: |
| if (HasImmediateInput(instr, 1)) { |
| __ shl(i.OutputOperand(), i.InputInt5(1)); |
| } else { |
| __ shl_cl(i.OutputOperand()); |
| } |
| break; |
| case kIA32Shr: |
| if (HasImmediateInput(instr, 1)) { |
| __ shr(i.OutputOperand(), i.InputInt5(1)); |
| } else { |
| __ shr_cl(i.OutputOperand()); |
| } |
| break; |
| case kIA32Sar: |
| if (HasImmediateInput(instr, 1)) { |
| __ sar(i.OutputOperand(), i.InputInt5(1)); |
| } else { |
| __ sar_cl(i.OutputOperand()); |
| } |
| break; |
| case kIA32Ror: |
| if (HasImmediateInput(instr, 1)) { |
| __ ror(i.OutputOperand(), i.InputInt5(1)); |
| } else { |
| __ ror_cl(i.OutputOperand()); |
| } |
| break; |
| case kIA32Lzcnt: |
| __ Lzcnt(i.OutputRegister(), i.InputOperand(0)); |
| break; |
| case kIA32Tzcnt: |
| __ Tzcnt(i.OutputRegister(), i.InputOperand(0)); |
| break; |
| case kIA32Popcnt: |
| __ Popcnt(i.OutputRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat32Cmp: |
| __ ucomiss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Add: |
| __ addss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Sub: |
| __ subss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Mul: |
| __ mulss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Div: |
| __ divss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| // Don't delete this mov. It may improve performance on some CPUs, |
| // when there is a (v)mulss depending on the result. |
| __ movaps(i.OutputDoubleRegister(), i.OutputDoubleRegister()); |
| break; |
| case kSSEFloat32Max: |
| __ maxss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Min: |
| __ minss(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat32Sqrt: |
| __ sqrtss(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat32Abs: { |
| // TODO(bmeurer): Use 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psrlq(kScratchDoubleReg, 33); |
| __ andps(i.OutputDoubleRegister(), kScratchDoubleReg); |
| break; |
| } |
| case kSSEFloat32Neg: { |
| // TODO(bmeurer): Use 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psllq(kScratchDoubleReg, 31); |
| __ xorps(i.OutputDoubleRegister(), kScratchDoubleReg); |
| break; |
| } |
| case kSSEFloat32Round: { |
| CpuFeatureScope sse_scope(masm(), SSE4_1); |
| RoundingMode const mode = |
| static_cast<RoundingMode>(MiscField::decode(instr->opcode())); |
| __ roundss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), mode); |
| break; |
| } |
| case kSSEFloat64Cmp: |
| __ ucomisd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Add: |
| __ addsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Sub: |
| __ subsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Mul: |
| __ mulsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Div: |
| __ divsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| // Don't delete this mov. It may improve performance on some CPUs, |
| // when there is a (v)mulsd depending on the result. |
| __ movaps(i.OutputDoubleRegister(), i.OutputDoubleRegister()); |
| break; |
| case kSSEFloat64Max: |
| __ maxsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Min: |
| __ minsd(i.InputDoubleRegister(0), i.InputOperand(1)); |
| break; |
| case kSSEFloat64Mod: { |
| // TODO(dcarney): alignment is wrong. |
| __ sub(esp, Immediate(kDoubleSize)); |
| // Move values to st(0) and st(1). |
| __ movsd(Operand(esp, 0), i.InputDoubleRegister(1)); |
| __ fld_d(Operand(esp, 0)); |
| __ movsd(Operand(esp, 0), i.InputDoubleRegister(0)); |
| __ fld_d(Operand(esp, 0)); |
| // Loop while fprem isn't done. |
| Label mod_loop; |
| __ bind(&mod_loop); |
| // This instructions traps on all kinds inputs, but we are assuming the |
| // floating point control word is set to ignore them all. |
| __ fprem(); |
| // The following 2 instruction implicitly use eax. |
| __ fnstsw_ax(); |
| __ sahf(); |
| __ j(parity_even, &mod_loop); |
| // Move output to stack and clean up. |
| __ fstp(1); |
| __ fstp_d(Operand(esp, 0)); |
| __ movsd(i.OutputDoubleRegister(), Operand(esp, 0)); |
| __ add(esp, Immediate(kDoubleSize)); |
| break; |
| } |
| case kSSEFloat64Abs: { |
| // TODO(bmeurer): Use 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psrlq(kScratchDoubleReg, 1); |
| __ andpd(i.OutputDoubleRegister(), kScratchDoubleReg); |
| break; |
| } |
| case kSSEFloat64Neg: { |
| // TODO(bmeurer): Use 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psllq(kScratchDoubleReg, 63); |
| __ xorpd(i.OutputDoubleRegister(), kScratchDoubleReg); |
| break; |
| } |
| case kSSEFloat64Sqrt: |
| __ sqrtsd(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat64Round: { |
| CpuFeatureScope sse_scope(masm(), SSE4_1); |
| RoundingMode const mode = |
| static_cast<RoundingMode>(MiscField::decode(instr->opcode())); |
| __ roundsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), mode); |
| break; |
| } |
| case kSSEFloat32ToFloat64: |
| __ cvtss2sd(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat64ToFloat32: |
| __ cvtsd2ss(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat64ToInt32: |
| __ cvttsd2si(i.OutputRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat64ToUint32: { |
| __ Move(kScratchDoubleReg, -2147483648.0); |
| __ addsd(kScratchDoubleReg, i.InputOperand(0)); |
| __ cvttsd2si(i.OutputRegister(), kScratchDoubleReg); |
| __ add(i.OutputRegister(), Immediate(0x80000000)); |
| break; |
| } |
| case kSSEInt32ToFloat64: |
| __ cvtsi2sd(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEUint32ToFloat64: |
| __ LoadUint32(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kSSEFloat64ExtractLowWord32: |
| if (instr->InputAt(0)->IsDoubleStackSlot()) { |
| __ mov(i.OutputRegister(), i.InputOperand(0)); |
| } else { |
| __ movd(i.OutputRegister(), i.InputDoubleRegister(0)); |
| } |
| break; |
| case kSSEFloat64ExtractHighWord32: |
| if (instr->InputAt(0)->IsDoubleStackSlot()) { |
| __ mov(i.OutputRegister(), i.InputOperand(0, kDoubleSize / 2)); |
| } else { |
| __ Pextrd(i.OutputRegister(), i.InputDoubleRegister(0), 1); |
| } |
| break; |
| case kSSEFloat64InsertLowWord32: |
| __ Pinsrd(i.OutputDoubleRegister(), i.InputOperand(1), 0); |
| break; |
| case kSSEFloat64InsertHighWord32: |
| __ Pinsrd(i.OutputDoubleRegister(), i.InputOperand(1), 1); |
| break; |
| case kSSEFloat64LoadLowWord32: |
| __ movd(i.OutputDoubleRegister(), i.InputOperand(0)); |
| break; |
| case kAVXFloat32Add: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vaddss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat32Sub: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vsubss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat32Mul: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vmulss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat32Div: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vdivss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| // Don't delete this mov. It may improve performance on some CPUs, |
| // when there is a (v)mulss depending on the result. |
| __ movaps(i.OutputDoubleRegister(), i.OutputDoubleRegister()); |
| break; |
| } |
| case kAVXFloat32Max: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vmaxss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat32Min: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vminss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat64Add: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vaddsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat64Sub: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vsubsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat64Mul: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vmulsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat64Div: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vdivsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| // Don't delete this mov. It may improve performance on some CPUs, |
| // when there is a (v)mulsd depending on the result. |
| __ movaps(i.OutputDoubleRegister(), i.OutputDoubleRegister()); |
| break; |
| } |
| case kAVXFloat64Max: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vmaxsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat64Min: { |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vminsd(i.OutputDoubleRegister(), i.InputDoubleRegister(0), |
| i.InputOperand(1)); |
| break; |
| } |
| case kAVXFloat32Abs: { |
| // TODO(bmeurer): Use RIP relative 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psrlq(kScratchDoubleReg, 33); |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vandps(i.OutputDoubleRegister(), kScratchDoubleReg, i.InputOperand(0)); |
| break; |
| } |
| case kAVXFloat32Neg: { |
| // TODO(bmeurer): Use RIP relative 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psllq(kScratchDoubleReg, 31); |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vxorps(i.OutputDoubleRegister(), kScratchDoubleReg, i.InputOperand(0)); |
| break; |
| } |
| case kAVXFloat64Abs: { |
| // TODO(bmeurer): Use RIP relative 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psrlq(kScratchDoubleReg, 1); |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vandpd(i.OutputDoubleRegister(), kScratchDoubleReg, i.InputOperand(0)); |
| break; |
| } |
| case kAVXFloat64Neg: { |
| // TODO(bmeurer): Use RIP relative 128-bit constants. |
| __ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg); |
| __ psllq(kScratchDoubleReg, 63); |
| CpuFeatureScope avx_scope(masm(), AVX); |
| __ vxorpd(i.OutputDoubleRegister(), kScratchDoubleReg, i.InputOperand(0)); |
| break; |
| } |
| case kIA32Movsxbl: |
| __ movsx_b(i.OutputRegister(), i.MemoryOperand()); |
| break; |
| case kIA32Movzxbl: |
| __ movzx_b(i.OutputRegister(), i.MemoryOperand()); |
| break; |
| case kIA32Movb: { |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| if (HasImmediateInput(instr, index)) { |
| __ mov_b(operand, i.InputInt8(index)); |
| } else { |
| __ mov_b(operand, i.InputRegister(index)); |
| } |
| break; |
| } |
| case kIA32Movsxwl: |
| __ movsx_w(i.OutputRegister(), i.MemoryOperand()); |
| break; |
| case kIA32Movzxwl: |
| __ movzx_w(i.OutputRegister(), i.MemoryOperand()); |
| break; |
| case kIA32Movw: { |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| if (HasImmediateInput(instr, index)) { |
| __ mov_w(operand, i.InputInt16(index)); |
| } else { |
| __ mov_w(operand, i.InputRegister(index)); |
| } |
| break; |
| } |
| case kIA32Movl: |
| if (instr->HasOutput()) { |
| __ mov(i.OutputRegister(), i.MemoryOperand()); |
| } else { |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| if (HasImmediateInput(instr, index)) { |
| __ mov(operand, i.InputImmediate(index)); |
| } else { |
| __ mov(operand, i.InputRegister(index)); |
| } |
| } |
| break; |
| case kIA32Movsd: |
| if (instr->HasOutput()) { |
| __ movsd(i.OutputDoubleRegister(), i.MemoryOperand()); |
| } else { |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| __ movsd(operand, i.InputDoubleRegister(index)); |
| } |
| break; |
| case kIA32Movss: |
| if (instr->HasOutput()) { |
| __ movss(i.OutputDoubleRegister(), i.MemoryOperand()); |
| } else { |
| size_t index = 0; |
| Operand operand = i.MemoryOperand(&index); |
| __ movss(operand, i.InputDoubleRegister(index)); |
| } |
| break; |
| case kIA32BitcastFI: |
| if (instr->InputAt(0)->IsDoubleStackSlot()) { |
| __ mov(i.OutputRegister(), i.InputOperand(0)); |
| } else { |
| __ movd(i.OutputRegister(), i.InputDoubleRegister(0)); |
| } |
| break; |
| case kIA32BitcastIF: |
| if (instr->InputAt(0)->IsRegister()) { |
| __ movd(i.OutputDoubleRegister(), i.InputRegister(0)); |
| } else { |
| __ movss(i.OutputDoubleRegister(), i.InputOperand(0)); |
| } |
| break; |
| case kIA32Lea: { |
| AddressingMode mode = AddressingModeField::decode(instr->opcode()); |
| // Shorten "leal" to "addl", "subl" or "shll" if the register allocation |
| // and addressing mode just happens to work out. The "addl"/"subl" forms |
| // in these cases are faster based on measurements. |
| if (mode == kMode_MI) { |
| __ Move(i.OutputRegister(), Immediate(i.InputInt32(0))); |
| } else if (i.InputRegister(0).is(i.OutputRegister())) { |
| if (mode == kMode_MRI) { |
| int32_t constant_summand = i.InputInt32(1); |
| if (constant_summand > 0) { |
| __ add(i.OutputRegister(), Immediate(constant_summand)); |
| } else if (constant_summand < 0) { |
| __ sub(i.OutputRegister(), Immediate(-constant_summand)); |
| } |
| } else if (mode == kMode_MR1) { |
| if (i.InputRegister(1).is(i.OutputRegister())) { |
| __ shl(i.OutputRegister(), 1); |
| } else { |
| __ lea(i.OutputRegister(), i.MemoryOperand()); |
| } |
| } else if (mode == kMode_M2) { |
| __ shl(i.OutputRegister(), 1); |
| } else if (mode == kMode_M4) { |
| __ shl(i.OutputRegister(), 2); |
| } else if (mode == kMode_M8) { |
| __ shl(i.OutputRegister(), 3); |
| } else { |
| __ lea(i.OutputRegister(), i.MemoryOperand()); |
| } |
| } else { |
| __ lea(i.OutputRegister(), i.MemoryOperand()); |
| } |
| break; |
| } |
| case kIA32PushFloat32: |
| if (instr->InputAt(0)->IsDoubleRegister()) { |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movss(Operand(esp, 0), i.InputDoubleRegister(0)); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } else if (HasImmediateInput(instr, 0)) { |
| __ Move(kScratchDoubleReg, i.InputDouble(0)); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movss(Operand(esp, 0), kScratchDoubleReg); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } else { |
| __ movsd(kScratchDoubleReg, i.InputOperand(0)); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movss(Operand(esp, 0), kScratchDoubleReg); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } |
| break; |
| case kIA32PushFloat64: |
| if (instr->InputAt(0)->IsDoubleRegister()) { |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movsd(Operand(esp, 0), i.InputDoubleRegister(0)); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } else if (HasImmediateInput(instr, 0)) { |
| __ Move(kScratchDoubleReg, i.InputDouble(0)); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movsd(Operand(esp, 0), kScratchDoubleReg); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } else { |
| __ movsd(kScratchDoubleReg, i.InputOperand(0)); |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movsd(Operand(esp, 0), kScratchDoubleReg); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } |
| break; |
| case kIA32Push: |
| if (instr->InputAt(0)->IsDoubleRegister()) { |
| __ sub(esp, Immediate(kDoubleSize)); |
| __ movsd(Operand(esp, 0), i.InputDoubleRegister(0)); |
| frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize); |
| } else if (HasImmediateInput(instr, 0)) { |
| __ push(i.InputImmediate(0)); |
| frame_access_state()->IncreaseSPDelta(1); |
| } else { |
| __ push(i.InputOperand(0)); |
| frame_access_state()->IncreaseSPDelta(1); |
| } |
| break; |
| case kIA32Poke: { |
| int const slot = MiscField::decode(instr->opcode()); |
| if (HasImmediateInput(instr, 0)) { |
| __ mov(Operand(esp, slot * kPointerSize), i.InputImmediate(0)); |
| } else { |
| __ mov(Operand(esp, slot * kPointerSize), i.InputRegister(0)); |
| } |
| break; |
| } |
| case kCheckedLoadInt8: |
| ASSEMBLE_CHECKED_LOAD_INTEGER(movsx_b); |
| break; |
| case kCheckedLoadUint8: |
| ASSEMBLE_CHECKED_LOAD_INTEGER(movzx_b); |
| break; |
| case kCheckedLoadInt16: |
| ASSEMBLE_CHECKED_LOAD_INTEGER(movsx_w); |
| break; |
| case kCheckedLoadUint16: |
| ASSEMBLE_CHECKED_LOAD_INTEGER(movzx_w); |
| break; |
| case kCheckedLoadWord32: |
| ASSEMBLE_CHECKED_LOAD_INTEGER(mov); |
| break; |
| case kCheckedLoadFloat32: |
| ASSEMBLE_CHECKED_LOAD_FLOAT(movss); |
| break; |
| case kCheckedLoadFloat64: |
| ASSEMBLE_CHECKED_LOAD_FLOAT(movsd); |
| break; |
| case kCheckedStoreWord8: |
| ASSEMBLE_CHECKED_STORE_INTEGER(mov_b); |
| break; |
| case kCheckedStoreWord16: |
| ASSEMBLE_CHECKED_STORE_INTEGER(mov_w); |
| break; |
| case kCheckedStoreWord32: |
| ASSEMBLE_CHECKED_STORE_INTEGER(mov); |
| break; |
| case kCheckedStoreFloat32: |
| ASSEMBLE_CHECKED_STORE_FLOAT(movss); |
| break; |
| case kCheckedStoreFloat64: |
| ASSEMBLE_CHECKED_STORE_FLOAT(movsd); |
| break; |
| case kIA32StackCheck: { |
| ExternalReference const stack_limit = |
| ExternalReference::address_of_stack_limit(isolate()); |
| __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| break; |
| } |
| case kCheckedLoadWord64: |
| case kCheckedStoreWord64: |
| UNREACHABLE(); // currently unsupported checked int64 load/store. |
| break; |
| } |
| } // NOLINT(readability/fn_size) |
| |
| |
| // Assembles a branch after an instruction. |
| void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) { |
| IA32OperandConverter i(this, instr); |
| Label::Distance flabel_distance = |
| branch->fallthru ? Label::kNear : Label::kFar; |
| Label* tlabel = branch->true_label; |
| Label* flabel = branch->false_label; |
| switch (branch->condition) { |
| case kUnorderedEqual: |
| __ j(parity_even, flabel, flabel_distance); |
| // Fall through. |
| case kEqual: |
| __ j(equal, tlabel); |
| break; |
| case kUnorderedNotEqual: |
| __ j(parity_even, tlabel); |
| // Fall through. |
| case kNotEqual: |
| __ j(not_equal, tlabel); |
| break; |
| case kSignedLessThan: |
| __ j(less, tlabel); |
| break; |
| case kSignedGreaterThanOrEqual: |
| __ j(greater_equal, tlabel); |
| break; |
| case kSignedLessThanOrEqual: |
| __ j(less_equal, tlabel); |
| break; |
| case kSignedGreaterThan: |
| __ j(greater, tlabel); |
| break; |
| case kUnsignedLessThan: |
| __ j(below, tlabel); |
| break; |
| case kUnsignedGreaterThanOrEqual: |
| __ j(above_equal, tlabel); |
| break; |
| case kUnsignedLessThanOrEqual: |
| __ j(below_equal, tlabel); |
| break; |
| case kUnsignedGreaterThan: |
| __ j(above, tlabel); |
| break; |
| case kOverflow: |
| __ j(overflow, tlabel); |
| break; |
| case kNotOverflow: |
| __ j(no_overflow, tlabel); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| // Add a jump if not falling through to the next block. |
| if (!branch->fallthru) __ jmp(flabel); |
| } |
| |
| |
| void CodeGenerator::AssembleArchJump(RpoNumber target) { |
| if (!IsNextInAssemblyOrder(target)) __ jmp(GetLabel(target)); |
| } |
| |
| |
| // Assembles boolean materializations after an instruction. |
| void CodeGenerator::AssembleArchBoolean(Instruction* instr, |
| FlagsCondition condition) { |
| IA32OperandConverter i(this, instr); |
| Label done; |
| |
| // Materialize a full 32-bit 1 or 0 value. The result register is always the |
| // last output of the instruction. |
| Label check; |
| DCHECK_NE(0u, instr->OutputCount()); |
| Register reg = i.OutputRegister(instr->OutputCount() - 1); |
| Condition cc = no_condition; |
| switch (condition) { |
| case kUnorderedEqual: |
| __ j(parity_odd, &check, Label::kNear); |
| __ Move(reg, Immediate(0)); |
| __ jmp(&done, Label::kNear); |
| // Fall through. |
| case kEqual: |
| cc = equal; |
| break; |
| case kUnorderedNotEqual: |
| __ j(parity_odd, &check, Label::kNear); |
| __ mov(reg, Immediate(1)); |
| __ jmp(&done, Label::kNear); |
| // Fall through. |
| case kNotEqual: |
| cc = not_equal; |
| break; |
| case kSignedLessThan: |
| cc = less; |
| break; |
| case kSignedGreaterThanOrEqual: |
| cc = greater_equal; |
| break; |
| case kSignedLessThanOrEqual: |
| cc = less_equal; |
| break; |
| case kSignedGreaterThan: |
| cc = greater; |
| break; |
| case kUnsignedLessThan: |
| cc = below; |
| break; |
| case kUnsignedGreaterThanOrEqual: |
| cc = above_equal; |
| break; |
| case kUnsignedLessThanOrEqual: |
| cc = below_equal; |
| break; |
| case kUnsignedGreaterThan: |
| cc = above; |
| break; |
| case kOverflow: |
| cc = overflow; |
| break; |
| case kNotOverflow: |
| cc = no_overflow; |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| __ bind(&check); |
| if (reg.is_byte_register()) { |
| // setcc for byte registers (al, bl, cl, dl). |
| __ setcc(cc, reg); |
| __ movzx_b(reg, reg); |
| } else { |
| // Emit a branch to set a register to either 1 or 0. |
| Label set; |
| __ j(cc, &set, Label::kNear); |
| __ Move(reg, Immediate(0)); |
| __ jmp(&done, Label::kNear); |
| __ bind(&set); |
| __ mov(reg, Immediate(1)); |
| } |
| __ bind(&done); |
| } |
| |
| |
| void CodeGenerator::AssembleArchLookupSwitch(Instruction* instr) { |
| IA32OperandConverter i(this, instr); |
| Register input = i.InputRegister(0); |
| for (size_t index = 2; index < instr->InputCount(); index += 2) { |
| __ cmp(input, Immediate(i.InputInt32(index + 0))); |
| __ j(equal, GetLabel(i.InputRpo(index + 1))); |
| } |
| AssembleArchJump(i.InputRpo(1)); |
| } |
| |
| |
| void CodeGenerator::AssembleArchTableSwitch(Instruction* instr) { |
| IA32OperandConverter i(this, instr); |
| Register input = i.InputRegister(0); |
| size_t const case_count = instr->InputCount() - 2; |
| Label** cases = zone()->NewArray<Label*>(case_count); |
| for (size_t index = 0; index < case_count; ++index) { |
| cases[index] = GetLabel(i.InputRpo(index + 2)); |
| } |
| Label* const table = AddJumpTable(cases, case_count); |
| __ cmp(input, Immediate(case_count)); |
| __ j(above_equal, GetLabel(i.InputRpo(1))); |
| __ jmp(Operand::JumpTable(input, times_4, table)); |
| } |
| |
| |
| void CodeGenerator::AssembleDeoptimizerCall( |
| int deoptimization_id, Deoptimizer::BailoutType bailout_type) { |
| Address deopt_entry = Deoptimizer::GetDeoptimizationEntry( |
| isolate(), deoptimization_id, bailout_type); |
| __ call(deopt_entry, RelocInfo::RUNTIME_ENTRY); |
| } |
| |
| |
| // The calling convention for JSFunctions on IA32 passes arguments on the |
| // stack and the JSFunction and context in EDI and ESI, respectively, thus |
| // the steps of the call look as follows: |
| |
| // --{ before the call instruction }-------------------------------------------- |
| // | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ push arguments and setup ESI, EDI }-------------------------------------- |
| // | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| // [edi = JSFunction, esi = context] |
| |
| // --{ call [edi + kCodeEntryOffset] }------------------------------------------ |
| // | RET | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| |
| // =={ prologue of called function }============================================ |
| // --{ push ebp }--------------------------------------------------------------- |
| // | FP | RET | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ mov ebp, esp }----------------------------------------------------------- |
| // | FP | RET | args + receiver | caller frame | |
| // ^ ebp,esp |
| |
| // --{ push esi }--------------------------------------------------------------- |
| // | CTX | FP | RET | args + receiver | caller frame | |
| // ^esp ^ ebp |
| |
| // --{ push edi }--------------------------------------------------------------- |
| // | FNC | CTX | FP | RET | args + receiver | caller frame | |
| // ^esp ^ ebp |
| |
| // --{ subi esp, #N }----------------------------------------------------------- |
| // | callee frame | FNC | CTX | FP | RET | args + receiver | caller frame | |
| // ^esp ^ ebp |
| |
| // =={ body of called function }================================================ |
| |
| // =={ epilogue of called function }============================================ |
| // --{ mov esp, ebp }----------------------------------------------------------- |
| // | FP | RET | args + receiver | caller frame | |
| // ^ esp,ebp |
| |
| // --{ pop ebp }----------------------------------------------------------- |
| // | | RET | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ ret #A+1 }----------------------------------------------------------- |
| // | | caller frame | |
| // ^ esp ^ ebp |
| |
| |
| // Runtime function calls are accomplished by doing a stub call to the |
| // CEntryStub (a real code object). On IA32 passes arguments on the |
| // stack, the number of arguments in EAX, the address of the runtime function |
| // in EBX, and the context in ESI. |
| |
| // --{ before the call instruction }-------------------------------------------- |
| // | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ push arguments and setup EAX, EBX, and ESI }----------------------------- |
| // | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| // [eax = #args, ebx = runtime function, esi = context] |
| |
| // --{ call #CEntryStub }------------------------------------------------------- |
| // | RET | args + receiver | caller frame | |
| // ^ esp ^ ebp |
| |
| // =={ body of runtime function }=============================================== |
| |
| // --{ runtime returns }-------------------------------------------------------- |
| // | caller frame | |
| // ^ esp ^ ebp |
| |
| // Other custom linkages (e.g. for calling directly into and out of C++) may |
| // need to save callee-saved registers on the stack, which is done in the |
| // function prologue of generated code. |
| |
| // --{ before the call instruction }-------------------------------------------- |
| // | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ set up arguments in registers on stack }--------------------------------- |
| // | args | caller frame | |
| // ^ esp ^ ebp |
| // [r0 = arg0, r1 = arg1, ...] |
| |
| // --{ call code }-------------------------------------------------------------- |
| // | RET | args | caller frame | |
| // ^ esp ^ ebp |
| |
| // =={ prologue of called function }============================================ |
| // --{ push ebp }--------------------------------------------------------------- |
| // | FP | RET | args | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ mov ebp, esp }----------------------------------------------------------- |
| // | FP | RET | args | caller frame | |
| // ^ ebp,esp |
| |
| // --{ save registers }--------------------------------------------------------- |
| // | regs | FP | RET | args | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ subi esp, #N }----------------------------------------------------------- |
| // | callee frame | regs | FP | RET | args | caller frame | |
| // ^esp ^ ebp |
| |
| // =={ body of called function }================================================ |
| |
| // =={ epilogue of called function }============================================ |
| // --{ restore registers }------------------------------------------------------ |
| // | regs | FP | RET | args | caller frame | |
| // ^ esp ^ ebp |
| |
| // --{ mov esp, ebp }----------------------------------------------------------- |
| // | FP | RET | args | caller frame | |
| // ^ esp,ebp |
| |
| // --{ pop ebp }---------------------------------------------------------------- |
| // | RET | args | caller frame | |
| // ^ esp ^ ebp |
| |
| |
| void CodeGenerator::AssemblePrologue() { |
| CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); |
| if (descriptor->IsCFunctionCall()) { |
| // Assemble a prologue similar the to cdecl calling convention. |
| __ push(ebp); |
| __ mov(ebp, esp); |
| } else if (descriptor->IsJSFunctionCall()) { |
| // TODO(turbofan): this prologue is redundant with OSR, but still needed for |
| // code aging. |
| __ Prologue(this->info()->GeneratePreagedPrologue()); |
| } else if (frame()->needs_frame()) { |
| __ StubPrologue(); |
| } else { |
| frame()->SetElidedFrameSizeInSlots(kPCOnStackSize / kPointerSize); |
| } |
| frame_access_state()->SetFrameAccessToDefault(); |
| |
| int stack_shrink_slots = frame()->GetSpillSlotCount(); |
| if (info()->is_osr()) { |
| // TurboFan OSR-compiled functions cannot be entered directly. |
| __ Abort(kShouldNotDirectlyEnterOsrFunction); |
| |
| // Unoptimized code jumps directly to this entrypoint while the unoptimized |
| // frame is still on the stack. Optimized code uses OSR values directly from |
| // the unoptimized frame. Thus, all that needs to be done is to allocate the |
| // remaining stack slots. |
| if (FLAG_code_comments) __ RecordComment("-- OSR entrypoint --"); |
| osr_pc_offset_ = __ pc_offset(); |
| // TODO(titzer): cannot address target function == local #-1 |
| __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| stack_shrink_slots -= OsrHelper(info()).UnoptimizedFrameSlots(); |
| } |
| |
| const RegList saves = descriptor->CalleeSavedRegisters(); |
| if (stack_shrink_slots > 0) { |
| __ sub(esp, Immediate(stack_shrink_slots * kPointerSize)); |
| } |
| |
| if (saves != 0) { // Save callee-saved registers. |
| DCHECK(!info()->is_osr()); |
| int pushed = 0; |
| for (int i = Register::kNumRegisters - 1; i >= 0; i--) { |
| if (!((1 << i) & saves)) continue; |
| __ push(Register::from_code(i)); |
| ++pushed; |
| } |
| frame()->AllocateSavedCalleeRegisterSlots(pushed); |
| } |
| } |
| |
| |
| void CodeGenerator::AssembleReturn() { |
| CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); |
| |
| const RegList saves = descriptor->CalleeSavedRegisters(); |
| // Restore registers. |
| if (saves != 0) { |
| for (int i = 0; i < Register::kNumRegisters; i++) { |
| if (!((1 << i) & saves)) continue; |
| __ pop(Register::from_code(i)); |
| } |
| } |
| |
| if (descriptor->IsCFunctionCall()) { |
| __ mov(esp, ebp); // Move stack pointer back to frame pointer. |
| __ pop(ebp); // Pop caller's frame pointer. |
| } else if (frame()->needs_frame()) { |
| // Canonicalize JSFunction return sites for now. |
| if (return_label_.is_bound()) { |
| __ jmp(&return_label_); |
| return; |
| } else { |
| __ bind(&return_label_); |
| __ mov(esp, ebp); // Move stack pointer back to frame pointer. |
| __ pop(ebp); // Pop caller's frame pointer. |
| } |
| } |
| size_t pop_size = descriptor->StackParameterCount() * kPointerSize; |
| // Might need ecx for scratch if pop_size is too big. |
| DCHECK_EQ(0u, descriptor->CalleeSavedRegisters() & ecx.bit()); |
| __ Ret(static_cast<int>(pop_size), ecx); |
| } |
| |
| |
| void CodeGenerator::AssembleMove(InstructionOperand* source, |
| InstructionOperand* destination) { |
| IA32OperandConverter g(this, nullptr); |
| // Dispatch on the source and destination operand kinds. Not all |
| // combinations are possible. |
| if (source->IsRegister()) { |
| DCHECK(destination->IsRegister() || destination->IsStackSlot()); |
| Register src = g.ToRegister(source); |
| Operand dst = g.ToOperand(destination); |
| __ mov(dst, src); |
| } else if (source->IsStackSlot()) { |
| DCHECK(destination->IsRegister() || destination->IsStackSlot()); |
| Operand src = g.ToOperand(source); |
| if (destination->IsRegister()) { |
| Register dst = g.ToRegister(destination); |
| __ mov(dst, src); |
| } else { |
| Operand dst = g.ToOperand(destination); |
| __ push(src); |
| __ pop(dst); |
| } |
| } else if (source->IsConstant()) { |
| Constant src_constant = g.ToConstant(source); |
| if (src_constant.type() == Constant::kHeapObject) { |
| Handle<HeapObject> src = src_constant.ToHeapObject(); |
| int offset; |
| if (IsMaterializableFromFrame(src, &offset)) { |
| if (destination->IsRegister()) { |
| Register dst = g.ToRegister(destination); |
| __ mov(dst, g.ToMaterializableOperand(offset)); |
| } else { |
| DCHECK(destination->IsStackSlot()); |
| Operand dst = g.ToOperand(destination); |
| __ push(g.ToMaterializableOperand(offset)); |
| __ pop(dst); |
| } |
| } else if (destination->IsRegister()) { |
| Register dst = g.ToRegister(destination); |
| __ LoadHeapObject(dst, src); |
| } else { |
| DCHECK(destination->IsStackSlot()); |
| Operand dst = g.ToOperand(destination); |
| AllowDeferredHandleDereference embedding_raw_address; |
| if (isolate()->heap()->InNewSpace(*src)) { |
| __ PushHeapObject(src); |
| __ pop(dst); |
| } else { |
| __ mov(dst, src); |
| } |
| } |
| } else if (destination->IsRegister()) { |
| Register dst = g.ToRegister(destination); |
| __ Move(dst, g.ToImmediate(source)); |
| } else if (destination->IsStackSlot()) { |
| Operand dst = g.ToOperand(destination); |
| __ Move(dst, g.ToImmediate(source)); |
| } else if (src_constant.type() == Constant::kFloat32) { |
| // TODO(turbofan): Can we do better here? |
| uint32_t src = bit_cast<uint32_t>(src_constant.ToFloat32()); |
| if (destination->IsDoubleRegister()) { |
| XMMRegister dst = g.ToDoubleRegister(destination); |
| __ Move(dst, src); |
| } else { |
| DCHECK(destination->IsDoubleStackSlot()); |
| Operand dst = g.ToOperand(destination); |
| __ Move(dst, Immediate(src)); |
| } |
| } else { |
| DCHECK_EQ(Constant::kFloat64, src_constant.type()); |
| uint64_t src = bit_cast<uint64_t>(src_constant.ToFloat64()); |
| uint32_t lower = static_cast<uint32_t>(src); |
| uint32_t upper = static_cast<uint32_t>(src >> 32); |
| if (destination->IsDoubleRegister()) { |
| XMMRegister dst = g.ToDoubleRegister(destination); |
| __ Move(dst, src); |
| } else { |
| DCHECK(destination->IsDoubleStackSlot()); |
| Operand dst0 = g.ToOperand(destination); |
| Operand dst1 = g.HighOperand(destination); |
| __ Move(dst0, Immediate(lower)); |
| __ Move(dst1, Immediate(upper)); |
| } |
| } |
| } else if (source->IsDoubleRegister()) { |
| XMMRegister src = g.ToDoubleRegister(source); |
| if (destination->IsDoubleRegister()) { |
| XMMRegister dst = g.ToDoubleRegister(destination); |
| __ movaps(dst, src); |
| } else { |
| DCHECK(destination->IsDoubleStackSlot()); |
| Operand dst = g.ToOperand(destination); |
| __ movsd(dst, src); |
| } |
| } else if (source->IsDoubleStackSlot()) { |
| DCHECK(destination->IsDoubleRegister() || destination->IsDoubleStackSlot()); |
| Operand src = g.ToOperand(source); |
| if (destination->IsDoubleRegister()) { |
| XMMRegister dst = g.ToDoubleRegister(destination); |
| __ movsd(dst, src); |
| } else { |
| Operand dst = g.ToOperand(destination); |
| __ movsd(kScratchDoubleReg, src); |
| __ movsd(dst, kScratchDoubleReg); |
| } |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void CodeGenerator::AssembleSwap(InstructionOperand* source, |
| InstructionOperand* destination) { |
| IA32OperandConverter g(this, nullptr); |
| // Dispatch on the source and destination operand kinds. Not all |
| // combinations are possible. |
| if (source->IsRegister() && destination->IsRegister()) { |
| // Register-register. |
| Register src = g.ToRegister(source); |
| Register dst = g.ToRegister(destination); |
| __ push(src); |
| __ mov(src, dst); |
| __ pop(dst); |
| } else if (source->IsRegister() && destination->IsStackSlot()) { |
| // Register-memory. |
| Register src = g.ToRegister(source); |
| __ push(src); |
| frame_access_state()->IncreaseSPDelta(1); |
| Operand dst = g.ToOperand(destination); |
| __ mov(src, dst); |
| frame_access_state()->IncreaseSPDelta(-1); |
| dst = g.ToOperand(destination); |
| __ pop(dst); |
| } else if (source->IsStackSlot() && destination->IsStackSlot()) { |
| // Memory-memory. |
| Operand dst1 = g.ToOperand(destination); |
| __ push(dst1); |
| frame_access_state()->IncreaseSPDelta(1); |
| Operand src1 = g.ToOperand(source); |
| __ push(src1); |
| Operand dst2 = g.ToOperand(destination); |
| __ pop(dst2); |
| frame_access_state()->IncreaseSPDelta(-1); |
| Operand src2 = g.ToOperand(source); |
| __ pop(src2); |
| } else if (source->IsDoubleRegister() && destination->IsDoubleRegister()) { |
| // XMM register-register swap. |
| XMMRegister src = g.ToDoubleRegister(source); |
| XMMRegister dst = g.ToDoubleRegister(destination); |
| __ movaps(kScratchDoubleReg, src); |
| __ movaps(src, dst); |
| __ movaps(dst, kScratchDoubleReg); |
| } else if (source->IsDoubleRegister() && destination->IsDoubleStackSlot()) { |
| // XMM register-memory swap. |
| XMMRegister reg = g.ToDoubleRegister(source); |
| Operand other = g.ToOperand(destination); |
| __ movsd(kScratchDoubleReg, other); |
| __ movsd(other, reg); |
| __ movaps(reg, kScratchDoubleReg); |
| } else if (source->IsDoubleStackSlot() && destination->IsDoubleStackSlot()) { |
| // Double-width memory-to-memory. |
| Operand src0 = g.ToOperand(source); |
| Operand src1 = g.HighOperand(source); |
| Operand dst0 = g.ToOperand(destination); |
| Operand dst1 = g.HighOperand(destination); |
| __ movsd(kScratchDoubleReg, dst0); // Save destination in scratch register. |
| __ push(src0); // Then use stack to copy source to destination. |
| __ pop(dst0); |
| __ push(src1); |
| __ pop(dst1); |
| __ movsd(src0, kScratchDoubleReg); |
| } else { |
| // No other combinations are possible. |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void CodeGenerator::AssembleJumpTable(Label** targets, size_t target_count) { |
| for (size_t index = 0; index < target_count; ++index) { |
| __ dd(targets[index]); |
| } |
| } |
| |
| |
| void CodeGenerator::AddNopForSmiCodeInlining() { __ nop(); } |
| |
| |
| void CodeGenerator::EnsureSpaceForLazyDeopt() { |
| if (!info()->ShouldEnsureSpaceForLazyDeopt()) { |
| return; |
| } |
| |
| int space_needed = Deoptimizer::patch_size(); |
| // 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); |
| } |
| } |
| |
| #undef __ |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
