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// 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.
#ifndef V8_COMPILER_BACKEND_CODE_GENERATOR_IMPL_H_
#define V8_COMPILER_BACKEND_CODE_GENERATOR_IMPL_H_
#include "src/compiler/backend/code-generator.h"
#include "src/compiler/backend/instruction.h"
#include "src/compiler/linkage.h"
#include "src/compiler/opcodes.h"
#include "src/macro-assembler.h"
namespace v8 {
namespace internal {
namespace compiler {
// Converts InstructionOperands from a given instruction to
// architecture-specific
// registers and operands after they have been assigned by the register
// allocator.
class InstructionOperandConverter {
public:
InstructionOperandConverter(CodeGenerator* gen, Instruction* instr)
: gen_(gen), instr_(instr) {}
// -- Instruction operand accesses with conversions --------------------------
Register InputRegister(size_t index) {
return ToRegister(instr_->InputAt(index));
}
FloatRegister InputFloatRegister(size_t index) {
return ToFloatRegister(instr_->InputAt(index));
}
DoubleRegister InputDoubleRegister(size_t index) {
return ToDoubleRegister(instr_->InputAt(index));
}
Simd128Register InputSimd128Register(size_t index) {
return ToSimd128Register(instr_->InputAt(index));
}
double InputDouble(size_t index) { return ToDouble(instr_->InputAt(index)); }
float InputFloat32(size_t index) { return ToFloat32(instr_->InputAt(index)); }
int32_t InputInt32(size_t index) {
return ToConstant(instr_->InputAt(index)).ToInt32();
}
uint32_t InputUint32(size_t index) {
return bit_cast<uint32_t>(InputInt32(index));
}
int64_t InputInt64(size_t index) {
return ToConstant(instr_->InputAt(index)).ToInt64();
}
int8_t InputInt8(size_t index) {
return static_cast<int8_t>(InputInt32(index));
}
int16_t InputInt16(size_t index) {
return static_cast<int16_t>(InputInt32(index));
}
uint8_t InputInt3(size_t index) {
return static_cast<uint8_t>(InputInt32(index) & 0x7);
}
uint8_t InputInt4(size_t index) {
return static_cast<uint8_t>(InputInt32(index) & 0xF);
}
uint8_t InputInt5(size_t index) {
return static_cast<uint8_t>(InputInt32(index) & 0x1F);
}
uint8_t InputInt6(size_t index) {
return static_cast<uint8_t>(InputInt32(index) & 0x3F);
}
ExternalReference InputExternalReference(size_t index) {
return ToExternalReference(instr_->InputAt(index));
}
Handle<Code> InputCode(size_t index) {
return ToCode(instr_->InputAt(index));
}
Label* InputLabel(size_t index) { return ToLabel(instr_->InputAt(index)); }
RpoNumber InputRpo(size_t index) {
return ToRpoNumber(instr_->InputAt(index));
}
Register OutputRegister(size_t index = 0) {
return ToRegister(instr_->OutputAt(index));
}
Register TempRegister(size_t index) {
return ToRegister(instr_->TempAt(index));
}
FloatRegister OutputFloatRegister() {
return ToFloatRegister(instr_->Output());
}
DoubleRegister OutputDoubleRegister() {
return ToDoubleRegister(instr_->Output());
}
Simd128Register OutputSimd128Register() {
return ToSimd128Register(instr_->Output());
}
// -- Conversions for operands -----------------------------------------------
Label* ToLabel(InstructionOperand* op) {
return gen_->GetLabel(ToRpoNumber(op));
}
RpoNumber ToRpoNumber(InstructionOperand* op) {
return ToConstant(op).ToRpoNumber();
}
Register ToRegister(InstructionOperand* op) {
return LocationOperand::cast(op)->GetRegister();
}
FloatRegister ToFloatRegister(InstructionOperand* op) {
return LocationOperand::cast(op)->GetFloatRegister();
}
DoubleRegister ToDoubleRegister(InstructionOperand* op) {
return LocationOperand::cast(op)->GetDoubleRegister();
}
Simd128Register ToSimd128Register(InstructionOperand* op) {
return LocationOperand::cast(op)->GetSimd128Register();
}
Constant ToConstant(InstructionOperand* op) {
if (op->IsImmediate()) {
return gen_->instructions()->GetImmediate(ImmediateOperand::cast(op));
}
return gen_->instructions()->GetConstant(
ConstantOperand::cast(op)->virtual_register());
}
double ToDouble(InstructionOperand* op) {
return ToConstant(op).ToFloat64().value();
}
float ToFloat32(InstructionOperand* op) { return ToConstant(op).ToFloat32(); }
ExternalReference ToExternalReference(InstructionOperand* op) {
return ToConstant(op).ToExternalReference();
}
Handle<Code> ToCode(InstructionOperand* op) {
return ToConstant(op).ToCode();
}
const Frame* frame() const { return gen_->frame(); }
FrameAccessState* frame_access_state() const {
return gen_->frame_access_state();
}
Isolate* isolate() const { return gen_->isolate(); }
Linkage* linkage() const { return gen_->linkage(); }
protected:
CodeGenerator* gen_;
Instruction* instr_;
};
// Eager deoptimization exit.
class DeoptimizationExit : public ZoneObject {
public:
explicit DeoptimizationExit(int deoptimization_id, SourcePosition pos)
: deoptimization_id_(deoptimization_id), pos_(pos) {}
int deoptimization_id() const { return deoptimization_id_; }
Label* label() { return &label_; }
SourcePosition pos() const { return pos_; }
private:
int const deoptimization_id_;
Label label_;
SourcePosition const pos_;
};
// Generator for out-of-line code that is emitted after the main code is done.
class OutOfLineCode : public ZoneObject {
public:
explicit OutOfLineCode(CodeGenerator* gen);
virtual ~OutOfLineCode();
virtual void Generate() = 0;
Label* entry() { return &entry_; }
Label* exit() { return &exit_; }
const Frame* frame() const { return frame_; }
TurboAssembler* tasm() { return tasm_; }
OutOfLineCode* next() const { return next_; }
private:
Label entry_;
Label exit_;
const Frame* const frame_;
TurboAssembler* const tasm_;
OutOfLineCode* const next_;
};
inline bool HasCallDescriptorFlag(Instruction* instr,
CallDescriptor::Flag flag) {
return MiscField::decode(instr->opcode()) & flag;
}
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_BACKEND_CODE_GENERATOR_IMPL_H_
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