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chromium / v8 / v8 / d126e3fc5561a774cf5e4c70441ac585b2131e74 / . / src / compiler / x64 / code-generator-x64.cc
blob: 8f9b69d2c8b033f7654bbc6f53bd4b5d23934667 [file] [log] [blame]
// 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 <limits>
#include "src/compilation-info.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/heap/heap-inl.h"
#include "src/wasm/wasm-module.h"
#include "src/x64/assembler-x64.h"
#include "src/x64/macro-assembler-x64.h"
namespace v8 {
namespace internal {
namespace compiler {
#define __ masm()->
// Adds X64 specific methods for decoding operands.
class X64OperandConverter : public InstructionOperandConverter {
public:
X64OperandConverter(CodeGenerator* gen, Instruction* instr)
: InstructionOperandConverter(gen, instr) {}
Immediate InputImmediate(size_t index) {
return ToImmediate(instr_->InputAt(index));
}
Operand InputOperand(size_t index, int extra = 0) {
return ToOperand(instr_->InputAt(index), extra);
}
Operand OutputOperand() { return ToOperand(instr_->Output()); }
Immediate ToImmediate(InstructionOperand* operand) {
Constant constant = ToConstant(operand);
if (constant.type() == Constant::kFloat64) {
DCHECK_EQ(0, bit_cast<int64_t>(constant.ToFloat64()));
return Immediate(0);
}
if (RelocInfo::IsWasmReference(constant.rmode())) {
return Immediate(constant.ToInt32(), constant.rmode());
}
return Immediate(constant.ToInt32());
}
Operand ToOperand(InstructionOperand* op, int extra = 0) {
DCHECK(op->IsStackSlot() || op->IsFPStackSlot());
return SlotToOperand(AllocatedOperand::cast(op)->index(), extra);
}
Operand SlotToOperand(int slot_index, int extra = 0) {
FrameOffset offset = frame_access_state()->GetFrameOffset(slot_index);
return Operand(offset.from_stack_pointer() ? rsp : rbp,
offset.offset() + extra);
}
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: {
Register base = InputRegister(NextOffset(offset));
int32_t disp = 0;
return Operand(base, disp);
}
case kMode_M2:
UNREACHABLE(); // Should use kModeMR with more compact encoding instead
return Operand(no_reg, 0);
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_Root: {
Register base = kRootRegister;
int32_t disp = InputInt32(NextOffset(offset));
return Operand(base, 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 OutOfLineLoadZero final : public OutOfLineCode {
public:
OutOfLineLoadZero(CodeGenerator* gen, Register result)
: OutOfLineCode(gen), result_(result) {}
void Generate() final { __ xorl(result_, result_); }
private:
Register const result_;
};
class OutOfLineLoadFloat32NaN final : public OutOfLineCode {
public:
OutOfLineLoadFloat32NaN(CodeGenerator* gen, XMMRegister result)
: OutOfLineCode(gen), result_(result) {}
void Generate() final {
__ Xorps(result_, result_);
__ Divss(result_, result_);
}
private:
XMMRegister const result_;
};
class OutOfLineLoadFloat64NaN final : public OutOfLineCode {
public:
OutOfLineLoadFloat64NaN(CodeGenerator* gen, XMMRegister result)
: OutOfLineCode(gen), result_(result) {}
void Generate() final {
__ Xorpd(result_, result_);
__ Divsd(result_, result_);
}
private:
XMMRegister const result_;
};
class OutOfLineTruncateDoubleToI final : public OutOfLineCode {
public:
OutOfLineTruncateDoubleToI(CodeGenerator* gen, Register result,
XMMRegister input,
UnwindingInfoWriter* unwinding_info_writer)
: OutOfLineCode(gen),
result_(result),
input_(input),
unwinding_info_writer_(unwinding_info_writer) {}
void Generate() final {
__ subp(rsp, Immediate(kDoubleSize));
unwinding_info_writer_->MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kDoubleSize);
__ Movsd(MemOperand(rsp, 0), input_);
__ SlowTruncateToI(result_, rsp, 0);
__ addp(rsp, Immediate(kDoubleSize));
unwinding_info_writer_->MaybeIncreaseBaseOffsetAt(__ pc_offset(),
-kDoubleSize);
}
private:
Register const result_;
XMMRegister const input_;
UnwindingInfoWriter* const unwinding_info_writer_;
};
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());
}
__ CheckPageFlag(value_, scratch0_,
MemoryChunk::kPointersToHereAreInterestingMask, zero,
exit());
RememberedSetAction const remembered_set_action =
mode_ > RecordWriteMode::kValueIsMap ? EMIT_REMEMBERED_SET
: OMIT_REMEMBERED_SET;
SaveFPRegsMode const save_fp_mode =
frame()->DidAllocateDoubleRegisters() ? kSaveFPRegs : kDontSaveFPRegs;
RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
remembered_set_action, save_fp_mode);
__ leap(scratch1_, operand_);
__ CallStub(&stub);
}
private:
Register const object_;
Operand const operand_;
Register const value_;
Register const scratch0_;
Register const scratch1_;
RecordWriteMode const mode_;
};
class WasmOutOfLineTrap final : public OutOfLineCode {
public:
WasmOutOfLineTrap(CodeGenerator* gen, int pc, bool frame_elided,
int32_t position, Instruction* instr)
: OutOfLineCode(gen),
gen_(gen),
pc_(pc),
frame_elided_(frame_elided),
position_(position),
instr_(instr) {}
// TODO(eholk): Refactor this method to take the code generator as a
// parameter.
void Generate() final {
__ RecordProtectedInstructionLanding(pc_);
if (frame_elided_) {
__ EnterFrame(StackFrame::WASM_COMPILED);
}
wasm::TrapReason trap_id = wasm::kTrapMemOutOfBounds;
int trap_reason = wasm::WasmOpcodes::TrapReasonToMessageId(trap_id);
__ Push(Smi::FromInt(trap_reason));
__ Push(Smi::FromInt(position_));
__ Move(rsi, gen_->isolate()->native_context());
__ CallRuntime(Runtime::kThrowWasmError);
if (instr_->reference_map() != nullptr) {
gen_->RecordSafepoint(instr_->reference_map(), Safepoint::kSimple, 0,
Safepoint::kNoLazyDeopt);
}
}
private:
CodeGenerator* gen_;
int pc_;
bool frame_elided_;
int32_t position_;
Instruction* instr_;
};
void EmitOOLTrapIfNeeded(Zone* zone, CodeGenerator* codegen,
InstructionCode opcode, size_t input_count,
X64OperandConverter& i, int pc, Instruction* instr) {
const X64MemoryProtection protection =
static_cast<X64MemoryProtection>(MiscField::decode(opcode));
if (protection == X64MemoryProtection::kProtected) {
const bool frame_elided = !codegen->frame_access_state()->has_frame();
const int32_t position = i.InputInt32(input_count - 1);
new (zone) WasmOutOfLineTrap(codegen, pc, frame_elided, position, instr);
}
}
} // namespace
#define ASSEMBLE_UNOP(asm_instr) \
do { \
if (instr->Output()->IsRegister()) { \
__ asm_instr(i.OutputRegister()); \
} else { \
__ asm_instr(i.OutputOperand()); \
} \
} while (0)
#define ASSEMBLE_BINOP(asm_instr) \
do { \
if (HasImmediateInput(instr, 1)) { \
if (instr->InputAt(0)->IsRegister()) { \
__ asm_instr(i.InputRegister(0), i.InputImmediate(1)); \
} else { \
__ asm_instr(i.InputOperand(0), i.InputImmediate(1)); \
} \
} else { \
if (instr->InputAt(1)->IsRegister()) { \
__ asm_instr(i.InputRegister(0), i.InputRegister(1)); \
} else { \
__ asm_instr(i.InputRegister(0), i.InputOperand(1)); \
} \
} \
} while (0)
#define ASSEMBLE_COMPARE(asm_instr) \
do { \
if (AddressingModeField::decode(instr->opcode()) != kMode_None) { \
size_t index = 0; \
Operand left = i.MemoryOperand(&index); \
if (HasImmediateInput(instr, index)) { \
__ asm_instr(left, i.InputImmediate(index)); \
} else { \
__ asm_instr(left, i.InputRegister(index)); \
} \
} else { \
if (HasImmediateInput(instr, 1)) { \
if (instr->InputAt(0)->IsRegister()) { \
__ asm_instr(i.InputRegister(0), i.InputImmediate(1)); \
} else { \
__ asm_instr(i.InputOperand(0), i.InputImmediate(1)); \
} \
} else { \
if (instr->InputAt(1)->IsRegister()) { \
__ asm_instr(i.InputRegister(0), i.InputRegister(1)); \
} else { \
__ asm_instr(i.InputRegister(0), i.InputOperand(1)); \
} \
} \
} \
} while (0)
#define ASSEMBLE_MULT(asm_instr) \
do { \
if (HasImmediateInput(instr, 1)) { \
if (instr->InputAt(0)->IsRegister()) { \
__ asm_instr(i.OutputRegister(), i.InputRegister(0), \
i.InputImmediate(1)); \
} else { \
__ asm_instr(i.OutputRegister(), i.InputOperand(0), \
i.InputImmediate(1)); \
} \
} else { \
if (instr->InputAt(1)->IsRegister()) { \
__ asm_instr(i.OutputRegister(), i.InputRegister(1)); \
} else { \
__ asm_instr(i.OutputRegister(), i.InputOperand(1)); \
} \
} \
} while (0)
#define ASSEMBLE_SHIFT(asm_instr, width) \
do { \
if (HasImmediateInput(instr, 1)) { \
if (instr->Output()->IsRegister()) { \
__ asm_instr(i.OutputRegister(), Immediate(i.InputInt##width(1))); \
} else { \
__ asm_instr(i.OutputOperand(), Immediate(i.InputInt##width(1))); \
} \
} else { \
if (instr->Output()->IsRegister()) { \
__ asm_instr##_cl(i.OutputRegister()); \
} else { \
__ asm_instr##_cl(i.OutputOperand()); \
} \
} \
} while (0)
#define ASSEMBLE_MOVX(asm_instr) \
do { \
if (instr->addressing_mode() != kMode_None) { \
__ asm_instr(i.OutputRegister(), i.MemoryOperand()); \
} else if (instr->InputAt(0)->IsRegister()) { \
__ asm_instr(i.OutputRegister(), i.InputRegister(0)); \
} else { \
__ asm_instr(i.OutputRegister(), i.InputOperand(0)); \
} \
} while (0)
#define ASSEMBLE_SSE_BINOP(asm_instr) \
do { \
if (instr->InputAt(1)->IsFPRegister()) { \
__ asm_instr(i.InputDoubleRegister(0), i.InputDoubleRegister(1)); \
} else { \
__ asm_instr(i.InputDoubleRegister(0), i.InputOperand(1)); \
} \
} while (0)
#define ASSEMBLE_SSE_UNOP(asm_instr) \
do { \
if (instr->InputAt(0)->IsFPRegister()) { \
__ asm_instr(i.OutputDoubleRegister(), i.InputDoubleRegister(0)); \
} else { \
__ asm_instr(i.OutputDoubleRegister(), i.InputOperand(0)); \
} \
} while (0)
#define ASSEMBLE_AVX_BINOP(asm_instr) \
do { \
CpuFeatureScope avx_scope(masm(), AVX); \
if (instr->InputAt(1)->IsFPRegister()) { \
__ asm_instr(i.OutputDoubleRegister(), i.InputDoubleRegister(0), \
i.InputDoubleRegister(1)); \
} else { \
__ asm_instr(i.OutputDoubleRegister(), i.InputDoubleRegister(0), \
i.InputOperand(1)); \
} \
} while (0)
#define ASSEMBLE_CHECKED_LOAD_FLOAT(asm_instr, OutOfLineLoadNaN) \
do { \
auto result = i.OutputDoubleRegister(); \
auto buffer = i.InputRegister(0); \
auto index1 = i.InputRegister(1); \
auto index2 = i.InputUint32(2); \
OutOfLineCode* ool; \
if (instr->InputAt(3)->IsRegister()) { \
auto length = i.InputRegister(3); \
DCHECK_EQ(0u, index2); \
__ cmpl(index1, length); \
ool = new (zone()) OutOfLineLoadNaN(this, result); \
} else { \
auto length = i.InputUint32(3); \
RelocInfo::Mode rmode = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmpl(index1, Immediate(length - index2, rmode)); \
class OutOfLineLoadFloat final : public OutOfLineCode { \
public: \
OutOfLineLoadFloat(CodeGenerator* gen, XMMRegister result, \
Register buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode) \
: OutOfLineCode(gen), \
result_(result), \
buffer_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_(rmode) {} \
\
void Generate() final { \
__ leal(kScratchRegister, Operand(index1_, index2_)); \
__ Pcmpeqd(result_, result_); \
__ cmpl(kScratchRegister, Immediate(length_, rmode_)); \
__ j(above_equal, exit()); \
__ asm_instr(result_, \
Operand(buffer_, kScratchRegister, times_1, 0)); \
} \
\
private: \
XMMRegister const result_; \
Register const buffer_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
RelocInfo::Mode rmode_; \
}; \
ool = new (zone()) OutOfLineLoadFloat(this, result, buffer, index1, \
index2, length, rmode); \
} \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(buffer, index1, times_1, index2)); \
__ bind(ool->exit()); \
} while (false)
#define ASSEMBLE_CHECKED_LOAD_INTEGER(asm_instr) \
do { \
auto result = i.OutputRegister(); \
auto buffer = i.InputRegister(0); \
auto index1 = i.InputRegister(1); \
auto index2 = i.InputUint32(2); \
OutOfLineCode* ool; \
if (instr->InputAt(3)->IsRegister()) { \
auto length = i.InputRegister(3); \
DCHECK_EQ(0u, index2); \
__ cmpl(index1, length); \
ool = new (zone()) OutOfLineLoadZero(this, result); \
} else { \
auto length = i.InputUint32(3); \
RelocInfo::Mode rmode = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmpl(index1, Immediate(length - index2, rmode)); \
class OutOfLineLoadInteger final : public OutOfLineCode { \
public: \
OutOfLineLoadInteger(CodeGenerator* gen, Register result, \
Register buffer, Register index1, int32_t index2, \
int32_t length, RelocInfo::Mode rmode) \
: OutOfLineCode(gen), \
result_(result), \
buffer_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
rmode_(rmode) {} \
\
void Generate() final { \
Label oob; \
__ leal(kScratchRegister, Operand(index1_, index2_)); \
__ cmpl(kScratchRegister, Immediate(length_, rmode_)); \
__ j(above_equal, &oob, Label::kNear); \
__ asm_instr(result_, \
Operand(buffer_, kScratchRegister, times_1, 0)); \
__ jmp(exit()); \
__ bind(&oob); \
__ xorl(result_, result_); \
} \
\
private: \
Register const result_; \
Register const buffer_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
RelocInfo::Mode const rmode_; \
}; \
ool = new (zone()) OutOfLineLoadInteger(this, result, buffer, index1, \
index2, length, rmode); \
} \
__ j(above_equal, ool->entry()); \
__ asm_instr(result, Operand(buffer, index1, times_1, index2)); \
__ bind(ool->exit()); \
} while (false)
#define ASSEMBLE_CHECKED_STORE_FLOAT(asm_instr) \
do { \
auto buffer = i.InputRegister(0); \
auto index1 = i.InputRegister(1); \
auto index2 = i.InputUint32(2); \
auto value = i.InputDoubleRegister(4); \
if (instr->InputAt(3)->IsRegister()) { \
auto length = i.InputRegister(3); \
DCHECK_EQ(0u, index2); \
Label done; \
__ cmpl(index1, length); \
__ j(above_equal, &done, Label::kNear); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(&done); \
} else { \
auto length = i.InputUint32(3); \
RelocInfo::Mode rmode = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmpl(index1, Immediate(length - index2, rmode)); \
class OutOfLineStoreFloat final : public OutOfLineCode { \
public: \
OutOfLineStoreFloat(CodeGenerator* gen, Register buffer, \
Register index1, int32_t index2, int32_t length, \
XMMRegister value, RelocInfo::Mode rmode) \
: OutOfLineCode(gen), \
buffer_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_(rmode) {} \
\
void Generate() final { \
__ leal(kScratchRegister, Operand(index1_, index2_)); \
__ cmpl(kScratchRegister, Immediate(length_, rmode_)); \
__ j(above_equal, exit()); \
__ asm_instr(Operand(buffer_, kScratchRegister, times_1, 0), \
value_); \
} \
\
private: \
Register const buffer_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
XMMRegister const value_; \
RelocInfo::Mode rmode_; \
}; \
auto ool = new (zone()) OutOfLineStoreFloat( \
this, buffer, index1, index2, length, value, rmode); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(ool->exit()); \
} \
} while (false)
#define ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Value) \
do { \
auto buffer = i.InputRegister(0); \
auto index1 = i.InputRegister(1); \
auto index2 = i.InputUint32(2); \
if (instr->InputAt(3)->IsRegister()) { \
auto length = i.InputRegister(3); \
DCHECK_EQ(0u, index2); \
Label done; \
__ cmpl(index1, length); \
__ j(above_equal, &done, Label::kNear); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(&done); \
} else { \
auto length = i.InputUint32(3); \
RelocInfo::Mode rmode = i.ToConstant(instr->InputAt(3)).rmode(); \
DCHECK_LE(index2, length); \
__ cmpl(index1, Immediate(length - index2, rmode)); \
class OutOfLineStoreInteger final : public OutOfLineCode { \
public: \
OutOfLineStoreInteger(CodeGenerator* gen, Register buffer, \
Register index1, int32_t index2, int32_t length, \
Value value, RelocInfo::Mode rmode) \
: OutOfLineCode(gen), \
buffer_(buffer), \
index1_(index1), \
index2_(index2), \
length_(length), \
value_(value), \
rmode_(rmode) {} \
\
void Generate() final { \
__ leal(kScratchRegister, Operand(index1_, index2_)); \
__ cmpl(kScratchRegister, Immediate(length_, rmode_)); \
__ j(above_equal, exit()); \
__ asm_instr(Operand(buffer_, kScratchRegister, times_1, 0), \
value_); \
} \
\
private: \
Register const buffer_; \
Register const index1_; \
int32_t const index2_; \
int32_t const length_; \
Value const value_; \
RelocInfo::Mode rmode_; \
}; \
auto ool = new (zone()) OutOfLineStoreInteger( \
this, buffer, index1, index2, length, value, rmode); \
__ j(above_equal, ool->entry()); \
__ asm_instr(Operand(buffer, index1, times_1, index2), value); \
__ bind(ool->exit()); \
} \
} while (false)
#define ASSEMBLE_CHECKED_STORE_INTEGER(asm_instr) \
do { \
if (instr->InputAt(4)->IsRegister()) { \
Register value = i.InputRegister(4); \
ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Register); \
} else { \
Immediate value = i.InputImmediate(4); \
ASSEMBLE_CHECKED_STORE_INTEGER_IMPL(asm_instr, Immediate); \
} \
} while (false)
#define ASSEMBLE_IEEE754_BINOP(name) \
do { \
__ PrepareCallCFunction(2); \
__ CallCFunction(ExternalReference::ieee754_##name##_function(isolate()), \
2); \
} while (false)
#define ASSEMBLE_IEEE754_UNOP(name) \
do { \
__ PrepareCallCFunction(1); \
__ CallCFunction(ExternalReference::ieee754_##name##_function(isolate()), \
1); \
} while (false)
void CodeGenerator::AssembleDeconstructFrame() {
unwinding_info_writer_.MarkFrameDeconstructed(__ pc_offset());
__ movq(rsp, rbp);
__ popq(rbp);
}
void CodeGenerator::AssemblePrepareTailCall() {
if (frame_access_state()->has_frame()) {
__ movq(rbp, MemOperand(rbp, 0));
}
frame_access_state()->SetFrameAccessToSP();
}
void CodeGenerator::AssemblePopArgumentsAdaptorFrame(Register args_reg,
Register scratch1,
Register scratch2,
Register scratch3) {
DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3));
Label done;
// Check if current frame is an arguments adaptor frame.
__ cmpp(Operand(rbp, CommonFrameConstants::kContextOrFrameTypeOffset),
Immediate(StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)));
__ j(not_equal, &done, Label::kNear);
// Load arguments count from current arguments adaptor frame (note, it
// does not include receiver).
Register caller_args_count_reg = scratch1;
__ SmiToInteger32(
caller_args_count_reg,
Operand(rbp, ArgumentsAdaptorFrameConstants::kLengthOffset));
ParameterCount callee_args_count(args_reg);
__ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2,
scratch3, ReturnAddressState::kOnStack);
__ bind(&done);
}
namespace {
void AdjustStackPointerForTailCall(MacroAssembler* masm,
FrameAccessState* state,
int new_slot_above_sp,
bool allow_shrinkage = true) {
int current_sp_offset = state->GetSPToFPSlotCount() +
StandardFrameConstants::kFixedSlotCountAboveFp;
int stack_slot_delta = new_slot_above_sp - current_sp_offset;
if (stack_slot_delta > 0) {
masm->subq(rsp, Immediate(stack_slot_delta * kPointerSize));
state->IncreaseSPDelta(stack_slot_delta);
} else if (allow_shrinkage && stack_slot_delta < 0) {
masm->addq(rsp, Immediate(-stack_slot_delta * kPointerSize));
state->IncreaseSPDelta(stack_slot_delta);
}
}
} // namespace
void CodeGenerator::AssembleTailCallBeforeGap(Instruction* instr,
int first_unused_stack_slot) {
CodeGenerator::PushTypeFlags flags(kImmediatePush | kScalarPush);
ZoneVector<MoveOperands*> pushes(zone());
GetPushCompatibleMoves(instr, flags, &pushes);
if (!pushes.empty() &&
(LocationOperand::cast(pushes.back()->destination()).index() + 1 ==
first_unused_stack_slot)) {
X64OperandConverter g(this, instr);
for (auto move : pushes) {
LocationOperand destination_location(
LocationOperand::cast(move->destination()));
InstructionOperand source(move->source());
AdjustStackPointerForTailCall(masm(), frame_access_state(),
destination_location.index());
if (source.IsStackSlot()) {
LocationOperand source_location(LocationOperand::cast(source));
__ Push(g.SlotToOperand(source_location.index()));
} else if (source.IsRegister()) {
LocationOperand source_location(LocationOperand::cast(source));
__ Push(source_location.GetRegister());
} else if (source.IsImmediate()) {
__ Push(Immediate(ImmediateOperand::cast(source).inline_value()));
} else {
// Pushes of non-scalar data types is not supported.
UNIMPLEMENTED();
}
frame_access_state()->IncreaseSPDelta(1);
move->Eliminate();
}
}
AdjustStackPointerForTailCall(masm(), frame_access_state(),
first_unused_stack_slot, false);
}
void CodeGenerator::AssembleTailCallAfterGap(Instruction* instr,
int first_unused_stack_slot) {
AdjustStackPointerForTailCall(masm(), frame_access_state(),
first_unused_stack_slot);
}
// Assembles an instruction after register allocation, producing machine code.
CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
Instruction* instr) {
X64OperandConverter i(this, instr);
InstructionCode opcode = instr->opcode();
ArchOpcode arch_opcode = ArchOpcodeField::decode(opcode);
switch (arch_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);
__ addp(reg, Immediate(Code::kHeaderSize - kHeapObjectTag));
__ call(reg);
}
RecordCallPosition(instr);
frame_access_state()->ClearSPDelta();
break;
}
case kArchTailCallCodeObjectFromJSFunction:
case kArchTailCallCodeObject: {
if (arch_opcode == kArchTailCallCodeObjectFromJSFunction) {
AssemblePopArgumentsAdaptorFrame(kJavaScriptCallArgCountRegister,
i.TempRegister(0), i.TempRegister(1),
i.TempRegister(2));
}
if (HasImmediateInput(instr, 0)) {
Handle<Code> code = Handle<Code>::cast(i.InputHeapObject(0));
__ jmp(code, RelocInfo::CODE_TARGET);
} else {
Register reg = i.InputRegister(0);
__ addp(reg, Immediate(Code::kHeaderSize - kHeapObjectTag));
__ jmp(reg);
}
unwinding_info_writer_.MarkBlockWillExit();
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
break;
}
case kArchTailCallAddress: {
CHECK(!HasImmediateInput(instr, 0));
Register reg = i.InputRegister(0);
__ jmp(reg);
unwinding_info_writer_.MarkBlockWillExit();
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
break;
}
case kArchCallJSFunction: {
EnsureSpaceForLazyDeopt();
Register func = i.InputRegister(0);
if (FLAG_debug_code) {
// Check the function's context matches the context argument.
__ cmpp(rsi, FieldOperand(func, JSFunction::kContextOffset));
__ Assert(equal, kWrongFunctionContext);
}
__ Call(FieldOperand(func, JSFunction::kCodeEntryOffset));
frame_access_state()->ClearSPDelta();
RecordCallPosition(instr);
break;
}
case kArchTailCallJSFunctionFromJSFunction: {
Register func = i.InputRegister(0);
if (FLAG_debug_code) {
// Check the function's context matches the context argument.
__ cmpp(rsi, FieldOperand(func, JSFunction::kContextOffset));
__ Assert(equal, kWrongFunctionContext);
}
AssemblePopArgumentsAdaptorFrame(kJavaScriptCallArgCountRegister,
i.TempRegister(0), i.TempRegister(1),
i.TempRegister(2));
__ jmp(FieldOperand(func, JSFunction::kCodeEntryOffset));
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
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);
break;
}
case kArchPrepareTailCall:
AssemblePrepareTailCall();
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 kArchComment: {
Address comment_string = i.InputExternalReference(0).address();
__ RecordComment(reinterpret_cast<const char*>(comment_string));
break;
}
case kArchDebugBreak:
__ int3();
break;
case kArchNop:
case kArchThrowTerminator:
// don't emit code for nops.
break;
case kArchDeoptimize: {
int deopt_state_id =
BuildTranslation(instr, -1, 0, OutputFrameStateCombine::Ignore());
CodeGenResult result =
AssembleDeoptimizerCall(deopt_state_id, current_source_position_);
if (result != kSuccess) return result;
break;
}
case kArchRet:
AssembleReturn(instr->InputAt(0));
break;
case kArchStackPointer:
__ movq(i.OutputRegister(), rsp);
break;
case kArchFramePointer:
__ movq(i.OutputRegister(), rbp);
break;
case kArchParentFramePointer:
if (frame_access_state()->has_frame()) {
__ movq(i.OutputRegister(), Operand(rbp, 0));
} else {
__ movq(i.OutputRegister(), rbp);
}
break;
case kArchTruncateDoubleToI: {
auto result = i.OutputRegister();
auto input = i.InputDoubleRegister(0);
auto ool = new (zone()) OutOfLineTruncateDoubleToI(
this, result, input, &unwinding_info_writer_);
// We use Cvttsd2siq instead of Cvttsd2si due to performance reasons. The
// use of Cvttsd2siq requires the movl below to avoid sign extension.
__ Cvttsd2siq(result, input);
__ cmpq(result, Immediate(1));
__ j(overflow, ool->entry());
__ bind(ool->exit());
__ movl(result, result);
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);
__ movp(operand, value);
__ CheckPageFlag(object, scratch0,
MemoryChunk::kPointersFromHereAreInterestingMask,
not_zero, ool->entry());
__ bind(ool->exit());
break;
}
case kArchStackSlot: {
FrameOffset offset =
frame_access_state()->GetFrameOffset(i.InputInt32(0));
Register base;
if (offset.from_stack_pointer()) {
base = rsp;
} else {
base = rbp;
}
__ leaq(i.OutputRegister(), Operand(base, offset.offset()));
break;
}
case kIeee754Float64Acos:
ASSEMBLE_IEEE754_UNOP(acos);
break;
case kIeee754Float64Acosh:
ASSEMBLE_IEEE754_UNOP(acosh);
break;
case kIeee754Float64Asin:
ASSEMBLE_IEEE754_UNOP(asin);
break;
case kIeee754Float64Asinh:
ASSEMBLE_IEEE754_UNOP(asinh);
break;
case kIeee754Float64Atan:
ASSEMBLE_IEEE754_UNOP(atan);
break;
case kIeee754Float64Atanh:
ASSEMBLE_IEEE754_UNOP(atanh);
break;
case kIeee754Float64Atan2:
ASSEMBLE_IEEE754_BINOP(atan2);
break;
case kIeee754Float64Cbrt:
ASSEMBLE_IEEE754_UNOP(cbrt);
break;
case kIeee754Float64Cos:
ASSEMBLE_IEEE754_UNOP(cos);
break;
case kIeee754Float64Cosh:
ASSEMBLE_IEEE754_UNOP(cosh);
break;
case kIeee754Float64Exp:
ASSEMBLE_IEEE754_UNOP(exp);
break;
case kIeee754Float64Expm1:
ASSEMBLE_IEEE754_UNOP(expm1);
break;
case kIeee754Float64Log:
ASSEMBLE_IEEE754_UNOP(log);
break;
case kIeee754Float64Log1p:
ASSEMBLE_IEEE754_UNOP(log1p);
break;
case kIeee754Float64Log2:
ASSEMBLE_IEEE754_UNOP(log2);
break;
case kIeee754Float64Log10:
ASSEMBLE_IEEE754_UNOP(log10);
break;
case kIeee754Float64Pow: {
// TODO(bmeurer): Improve integration of the stub.
__ Movsd(xmm2, xmm0);
MathPowStub stub(isolate(), MathPowStub::DOUBLE);
__ CallStub(&stub);
__ Movsd(xmm0, xmm3);
break;
}
case kIeee754Float64Sin:
ASSEMBLE_IEEE754_UNOP(sin);
break;
case kIeee754Float64Sinh:
ASSEMBLE_IEEE754_UNOP(sinh);
break;
case kIeee754Float64Tan:
ASSEMBLE_IEEE754_UNOP(tan);
break;
case kIeee754Float64Tanh:
ASSEMBLE_IEEE754_UNOP(tanh);
break;
case kX64Add32:
ASSEMBLE_BINOP(addl);
break;
case kX64Add:
ASSEMBLE_BINOP(addq);
break;
case kX64Sub32:
ASSEMBLE_BINOP(subl);
break;
case kX64Sub:
ASSEMBLE_BINOP(subq);
break;
case kX64And32:
ASSEMBLE_BINOP(andl);
break;
case kX64And:
ASSEMBLE_BINOP(andq);
break;
case kX64Cmp8:
ASSEMBLE_COMPARE(cmpb);
break;
case kX64Cmp16:
ASSEMBLE_COMPARE(cmpw);
break;
case kX64Cmp32:
ASSEMBLE_COMPARE(cmpl);
break;
case kX64Cmp:
ASSEMBLE_COMPARE(cmpq);
break;
case kX64Test8:
ASSEMBLE_COMPARE(testb);
break;
case kX64Test16:
ASSEMBLE_COMPARE(testw);
break;
case kX64Test32:
ASSEMBLE_COMPARE(testl);
break;
case kX64Test:
ASSEMBLE_COMPARE(testq);
break;
case kX64Imul32:
ASSEMBLE_MULT(imull);
break;
case kX64Imul:
ASSEMBLE_MULT(imulq);
break;
case kX64ImulHigh32:
if (instr->InputAt(1)->IsRegister()) {
__ imull(i.InputRegister(1));
} else {
__ imull(i.InputOperand(1));
}
break;
case kX64UmulHigh32:
if (instr->InputAt(1)->IsRegister()) {
__ mull(i.InputRegister(1));
} else {
__ mull(i.InputOperand(1));
}
break;
case kX64Idiv32:
__ cdq();
__ idivl(i.InputRegister(1));
break;
case kX64Idiv:
__ cqo();
__ idivq(i.InputRegister(1));
break;
case kX64Udiv32:
__ xorl(rdx, rdx);
__ divl(i.InputRegister(1));
break;
case kX64Udiv:
__ xorq(rdx, rdx);
__ divq(i.InputRegister(1));
break;
case kX64Not:
ASSEMBLE_UNOP(notq);
break;
case kX64Not32:
ASSEMBLE_UNOP(notl);
break;
case kX64Neg:
ASSEMBLE_UNOP(negq);
break;
case kX64Neg32:
ASSEMBLE_UNOP(negl);
break;
case kX64Or32:
ASSEMBLE_BINOP(orl);
break;
case kX64Or:
ASSEMBLE_BINOP(orq);
break;
case kX64Xor32:
ASSEMBLE_BINOP(xorl);
break;
case kX64Xor:
ASSEMBLE_BINOP(xorq);
break;
case kX64Shl32:
ASSEMBLE_SHIFT(shll, 5);
break;
case kX64Shl:
ASSEMBLE_SHIFT(shlq, 6);
break;
case kX64Shr32:
ASSEMBLE_SHIFT(shrl, 5);
break;
case kX64Shr:
ASSEMBLE_SHIFT(shrq, 6);
break;
case kX64Sar32:
ASSEMBLE_SHIFT(sarl, 5);
break;
case kX64Sar:
ASSEMBLE_SHIFT(sarq, 6);
break;
case kX64Ror32:
ASSEMBLE_SHIFT(rorl, 5);
break;
case kX64Ror:
ASSEMBLE_SHIFT(rorq, 6);
break;
case kX64Lzcnt:
if (instr->InputAt(0)->IsRegister()) {
__ Lzcntq(i.OutputRegister(), i.InputRegister(0));
} else {
__ Lzcntq(i.OutputRegister(), i.InputOperand(0));
}
break;
case kX64Lzcnt32:
if (instr->InputAt(0)->IsRegister()) {
__ Lzcntl(i.OutputRegister(), i.InputRegister(0));
} else {
__ Lzcntl(i.OutputRegister(), i.InputOperand(0));
}
break;
case kX64Tzcnt:
if (instr->InputAt(0)->IsRegister()) {
__ Tzcntq(i.OutputRegister(), i.InputRegister(0));
} else {
__ Tzcntq(i.OutputRegister(), i.InputOperand(0));
}
break;
case kX64Tzcnt32:
if (instr->InputAt(0)->IsRegister()) {
__ Tzcntl(i.OutputRegister(), i.InputRegister(0));
} else {
__ Tzcntl(i.OutputRegister(), i.InputOperand(0));
}
break;
case kX64Popcnt:
if (instr->InputAt(0)->IsRegister()) {
__ Popcntq(i.OutputRegister(), i.InputRegister(0));
} else {
__ Popcntq(i.OutputRegister(), i.InputOperand(0));
}
break;
case kX64Popcnt32:
if (instr->InputAt(0)->IsRegister()) {
__ Popcntl(i.OutputRegister(), i.InputRegister(0));
} else {
__ Popcntl(i.OutputRegister(), i.InputOperand(0));
}
break;
case kSSEFloat32Cmp:
ASSEMBLE_SSE_BINOP(Ucomiss);
break;
case kSSEFloat32Add:
ASSEMBLE_SSE_BINOP(addss);
break;
case kSSEFloat32Sub:
ASSEMBLE_SSE_BINOP(subss);
break;
case kSSEFloat32Mul:
ASSEMBLE_SSE_BINOP(mulss);
break;
case kSSEFloat32Div:
ASSEMBLE_SSE_BINOP(divss);
// 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 kSSEFloat32Abs: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
__ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
__ psrlq(kScratchDoubleReg, 33);
__ andps(i.OutputDoubleRegister(), kScratchDoubleReg);
break;
}
case kSSEFloat32Neg: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
__ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
__ psllq(kScratchDoubleReg, 31);
__ xorps(i.OutputDoubleRegister(), kScratchDoubleReg);
break;
}
case kSSEFloat32Sqrt:
ASSEMBLE_SSE_UNOP(sqrtss);
break;
case kSSEFloat32ToFloat64:
ASSEMBLE_SSE_UNOP(Cvtss2sd);
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 kSSEFloat32ToInt32:
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttss2si(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttss2si(i.OutputRegister(), i.InputOperand(0));
}
break;
case kSSEFloat32ToUint32: {
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttss2siq(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttss2siq(i.OutputRegister(), i.InputOperand(0));
}
break;
}
case kSSEFloat64Cmp:
ASSEMBLE_SSE_BINOP(Ucomisd);
break;
case kSSEFloat64Add:
ASSEMBLE_SSE_BINOP(addsd);
break;
case kSSEFloat64Sub:
ASSEMBLE_SSE_BINOP(subsd);
break;
case kSSEFloat64Mul:
ASSEMBLE_SSE_BINOP(mulsd);
break;
case kSSEFloat64Div:
ASSEMBLE_SSE_BINOP(divsd);
// Don't delete this mov. It may improve performance on some CPUs,
// when there is a (v)mulsd depending on the result.
__ Movapd(i.OutputDoubleRegister(), i.OutputDoubleRegister());
break;
case kSSEFloat64Mod: {
__ subq(rsp, Immediate(kDoubleSize));
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kDoubleSize);
// Move values to st(0) and st(1).
__ Movsd(Operand(rsp, 0), i.InputDoubleRegister(1));
__ fld_d(Operand(rsp, 0));
__ Movsd(Operand(rsp, 0), i.InputDoubleRegister(0));
__ fld_d(Operand(rsp, 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 rax.
__ fnstsw_ax();
if (CpuFeatures::IsSupported(SAHF)) {
CpuFeatureScope sahf_scope(masm(), SAHF);
__ sahf();
} else {
__ shrl(rax, Immediate(8));
__ andl(rax, Immediate(0xFF));
__ pushq(rax);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
__ popfq();
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
-kPointerSize);
}
__ j(parity_even, &mod_loop);
// Move output to stack and clean up.
__ fstp(1);
__ fstp_d(Operand(rsp, 0));
__ Movsd(i.OutputDoubleRegister(), Operand(rsp, 0));
__ addq(rsp, Immediate(kDoubleSize));
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
-kDoubleSize);
break;
}
case kSSEFloat32Max: {
Label compare_nan, compare_swap, done_compare;
if (instr->InputAt(1)->IsFPRegister()) {
__ Ucomiss(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Ucomiss(i.InputDoubleRegister(0), i.InputOperand(1));
}
auto ool =
new (zone()) OutOfLineLoadFloat32NaN(this, i.OutputDoubleRegister());
__ j(parity_even, ool->entry());
__ j(above, &done_compare, Label::kNear);
__ j(below, &compare_swap, Label::kNear);
__ Movmskps(kScratchRegister, i.InputDoubleRegister(0));
__ testl(kScratchRegister, Immediate(1));
__ j(zero, &done_compare, Label::kNear);
__ bind(&compare_swap);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movss(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Movss(i.InputDoubleRegister(0), i.InputOperand(1));
}
__ bind(&done_compare);
__ bind(ool->exit());
break;
}
case kSSEFloat32Min: {
Label compare_swap, done_compare;
if (instr->InputAt(1)->IsFPRegister()) {
__ Ucomiss(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Ucomiss(i.InputDoubleRegister(0), i.InputOperand(1));
}
auto ool =
new (zone()) OutOfLineLoadFloat32NaN(this, i.OutputDoubleRegister());
__ j(parity_even, ool->entry());
__ j(below, &done_compare, Label::kNear);
__ j(above, &compare_swap, Label::kNear);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movmskps(kScratchRegister, i.InputDoubleRegister(1));
} else {
__ Movss(kScratchDoubleReg, i.InputOperand(1));
__ Movmskps(kScratchRegister, kScratchDoubleReg);
}
__ testl(kScratchRegister, Immediate(1));
__ j(zero, &done_compare, Label::kNear);
__ bind(&compare_swap);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movss(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Movss(i.InputDoubleRegister(0), i.InputOperand(1));
}
__ bind(&done_compare);
__ bind(ool->exit());
break;
}
case kSSEFloat64Max: {
Label compare_nan, compare_swap, done_compare;
if (instr->InputAt(1)->IsFPRegister()) {
__ Ucomisd(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Ucomisd(i.InputDoubleRegister(0), i.InputOperand(1));
}
auto ool =
new (zone()) OutOfLineLoadFloat64NaN(this, i.OutputDoubleRegister());
__ j(parity_even, ool->entry());
__ j(above, &done_compare, Label::kNear);
__ j(below, &compare_swap, Label::kNear);
__ Movmskpd(kScratchRegister, i.InputDoubleRegister(0));
__ testl(kScratchRegister, Immediate(1));
__ j(zero, &done_compare, Label::kNear);
__ bind(&compare_swap);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movsd(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Movsd(i.InputDoubleRegister(0), i.InputOperand(1));
}
__ bind(&done_compare);
__ bind(ool->exit());
break;
}
case kSSEFloat64Min: {
Label compare_swap, done_compare;
if (instr->InputAt(1)->IsFPRegister()) {
__ Ucomisd(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Ucomisd(i.InputDoubleRegister(0), i.InputOperand(1));
}
auto ool =
new (zone()) OutOfLineLoadFloat64NaN(this, i.OutputDoubleRegister());
__ j(parity_even, ool->entry());
__ j(below, &done_compare, Label::kNear);
__ j(above, &compare_swap, Label::kNear);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movmskpd(kScratchRegister, i.InputDoubleRegister(1));
} else {
__ Movsd(kScratchDoubleReg, i.InputOperand(1));
__ Movmskpd(kScratchRegister, kScratchDoubleReg);
}
__ testl(kScratchRegister, Immediate(1));
__ j(zero, &done_compare, Label::kNear);
__ bind(&compare_swap);
if (instr->InputAt(1)->IsFPRegister()) {
__ Movsd(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ Movsd(i.InputDoubleRegister(0), i.InputOperand(1));
}
__ bind(&done_compare);
__ bind(ool->exit());
break;
}
case kSSEFloat64Abs: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
__ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
__ psrlq(kScratchDoubleReg, 1);
__ andpd(i.OutputDoubleRegister(), kScratchDoubleReg);
break;
}
case kSSEFloat64Neg: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
__ pcmpeqd(kScratchDoubleReg, kScratchDoubleReg);
__ psllq(kScratchDoubleReg, 63);
__ xorpd(i.OutputDoubleRegister(), kScratchDoubleReg);
break;
}
case kSSEFloat64Sqrt:
ASSEMBLE_SSE_UNOP(Sqrtsd);
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 kSSEFloat64ToFloat32:
ASSEMBLE_SSE_UNOP(Cvtsd2ss);
break;
case kSSEFloat64ToInt32:
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttsd2si(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttsd2si(i.OutputRegister(), i.InputOperand(0));
}
break;
case kSSEFloat64ToUint32: {
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttsd2siq(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttsd2siq(i.OutputRegister(), i.InputOperand(0));
}
if (MiscField::decode(instr->opcode())) {
__ AssertZeroExtended(i.OutputRegister());
}
break;
}
case kSSEFloat32ToInt64:
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttss2siq(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttss2siq(i.OutputRegister(), i.InputOperand(0));
}
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 1);
Label done;
Label fail;
__ Move(kScratchDoubleReg, static_cast<float>(INT64_MIN));
if (instr->InputAt(0)->IsFPRegister()) {
__ Ucomiss(kScratchDoubleReg, i.InputDoubleRegister(0));
} else {
__ Ucomiss(kScratchDoubleReg, i.InputOperand(0));
}
// If the input is NaN, then the conversion fails.
__ j(parity_even, &fail);
// If the input is INT64_MIN, then the conversion succeeds.
__ j(equal, &done);
__ cmpq(i.OutputRegister(0), Immediate(1));
// If the conversion results in INT64_MIN, but the input was not
// INT64_MIN, then the conversion fails.
__ j(no_overflow, &done);
__ bind(&fail);
__ Set(i.OutputRegister(1), 0);
__ bind(&done);
}
break;
case kSSEFloat64ToInt64:
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttsd2siq(i.OutputRegister(0), i.InputDoubleRegister(0));
} else {
__ Cvttsd2siq(i.OutputRegister(0), i.InputOperand(0));
}
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 1);
Label done;
Label fail;
__ Move(kScratchDoubleReg, static_cast<double>(INT64_MIN));
if (instr->InputAt(0)->IsFPRegister()) {
__ Ucomisd(kScratchDoubleReg, i.InputDoubleRegister(0));
} else {
__ Ucomisd(kScratchDoubleReg, i.InputOperand(0));
}
// If the input is NaN, then the conversion fails.
__ j(parity_even, &fail);
// If the input is INT64_MIN, then the conversion succeeds.
__ j(equal, &done);
__ cmpq(i.OutputRegister(0), Immediate(1));
// If the conversion results in INT64_MIN, but the input was not
// INT64_MIN, then the conversion fails.
__ j(no_overflow, &done);
__ bind(&fail);
__ Set(i.OutputRegister(1), 0);
__ bind(&done);
}
break;
case kSSEFloat32ToUint64: {
Label done;
Label success;
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 0);
}
// There does not exist a Float32ToUint64 instruction, so we have to use
// the Float32ToInt64 instruction.
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttss2siq(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttss2siq(i.OutputRegister(), i.InputOperand(0));
}
// Check if the result of the Float32ToInt64 conversion is positive, we
// are already done.
__ testq(i.OutputRegister(), i.OutputRegister());
__ j(positive, &success);
// The result of the first conversion was negative, which means that the
// input value was not within the positive int64 range. We subtract 2^64
// and convert it again to see if it is within the uint64 range.
__ Move(kScratchDoubleReg, -9223372036854775808.0f);
if (instr->InputAt(0)->IsFPRegister()) {
__ addss(kScratchDoubleReg, i.InputDoubleRegister(0));
} else {
__ addss(kScratchDoubleReg, i.InputOperand(0));
}
__ Cvttss2siq(i.OutputRegister(), kScratchDoubleReg);
__ testq(i.OutputRegister(), i.OutputRegister());
// The only possible negative value here is 0x80000000000000000, which is
// used on x64 to indicate an integer overflow.
__ j(negative, &done);
// The input value is within uint64 range and the second conversion worked
// successfully, but we still have to undo the subtraction we did
// earlier.
__ Set(kScratchRegister, 0x8000000000000000);
__ orq(i.OutputRegister(), kScratchRegister);
__ bind(&success);
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 1);
}
__ bind(&done);
break;
}
case kSSEFloat64ToUint64: {
Label done;
Label success;
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 0);
}
// There does not exist a Float64ToUint64 instruction, so we have to use
// the Float64ToInt64 instruction.
if (instr->InputAt(0)->IsFPRegister()) {
__ Cvttsd2siq(i.OutputRegister(), i.InputDoubleRegister(0));
} else {
__ Cvttsd2siq(i.OutputRegister(), i.InputOperand(0));
}
// Check if the result of the Float64ToInt64 conversion is positive, we
// are already done.
__ testq(i.OutputRegister(), i.OutputRegister());
__ j(positive, &success);
// The result of the first conversion was negative, which means that the
// input value was not within the positive int64 range. We subtract 2^64
// and convert it again to see if it is within the uint64 range.
__ Move(kScratchDoubleReg, -9223372036854775808.0);
if (instr->InputAt(0)->IsFPRegister()) {
__ addsd(kScratchDoubleReg, i.InputDoubleRegister(0));
} else {
__ addsd(kScratchDoubleReg, i.InputOperand(0));
}
__ Cvttsd2siq(i.OutputRegister(), kScratchDoubleReg);
__ testq(i.OutputRegister(), i.OutputRegister());
// The only possible negative value here is 0x80000000000000000, which is
// used on x64 to indicate an integer overflow.
__ j(negative, &done);
// The input value is within uint64 range and the second conversion worked
// successfully, but we still have to undo the subtraction we did
// earlier.
__ Set(kScratchRegister, 0x8000000000000000);
__ orq(i.OutputRegister(), kScratchRegister);
__ bind(&success);
if (instr->OutputCount() > 1) {
__ Set(i.OutputRegister(1), 1);
}
__ bind(&done);
break;
}
case kSSEInt32ToFloat64:
if (instr->InputAt(0)->IsRegister()) {
__ Cvtlsi2sd(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Cvtlsi2sd(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kSSEInt32ToFloat32:
if (instr->InputAt(0)->IsRegister()) {
__ Cvtlsi2ss(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Cvtlsi2ss(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kSSEInt64ToFloat32:
if (instr->InputAt(0)->IsRegister()) {
__ Cvtqsi2ss(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Cvtqsi2ss(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kSSEInt64ToFloat64:
if (instr->InputAt(0)->IsRegister()) {
__ Cvtqsi2sd(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Cvtqsi2sd(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kSSEUint64ToFloat32:
if (instr->InputAt(0)->IsRegister()) {
__ movq(kScratchRegister, i.InputRegister(0));
} else {
__ movq(kScratchRegister, i.InputOperand(0));
}
__ Cvtqui2ss(i.OutputDoubleRegister(), kScratchRegister,
i.TempRegister(0));
break;
case kSSEUint64ToFloat64:
if (instr->InputAt(0)->IsRegister()) {
__ movq(kScratchRegister, i.InputRegister(0));
} else {
__ movq(kScratchRegister, i.InputOperand(0));
}
__ Cvtqui2sd(i.OutputDoubleRegister(), kScratchRegister,
i.TempRegister(0));
break;
case kSSEUint32ToFloat64:
if (instr->InputAt(0)->IsRegister()) {
__ movl(kScratchRegister, i.InputRegister(0));
} else {
__ movl(kScratchRegister, i.InputOperand(0));
}
__ Cvtqsi2sd(i.OutputDoubleRegister(), kScratchRegister);
break;
case kSSEUint32ToFloat32:
if (instr->InputAt(0)->IsRegister()) {
__ movl(kScratchRegister, i.InputRegister(0));
} else {
__ movl(kScratchRegister, i.InputOperand(0));
}
__ Cvtqsi2ss(i.OutputDoubleRegister(), kScratchRegister);
break;
case kSSEFloat64ExtractLowWord32:
if (instr->InputAt(0)->IsFPStackSlot()) {
__ movl(i.OutputRegister(), i.InputOperand(0));
} else {
__ Movd(i.OutputRegister(), i.InputDoubleRegister(0));
}
break;
case kSSEFloat64ExtractHighWord32:
if (instr->InputAt(0)->IsFPStackSlot()) {
__ movl(i.OutputRegister(), i.InputOperand(0, kDoubleSize / 2));
} else {
__ Pextrd(i.OutputRegister(), i.InputDoubleRegister(0), 1);
}
break;
case kSSEFloat64InsertLowWord32:
if (instr->InputAt(1)->IsRegister()) {
__ Pinsrd(i.OutputDoubleRegister(), i.InputRegister(1), 0);
} else {
__ Pinsrd(i.OutputDoubleRegister(), i.InputOperand(1), 0);
}
break;
case kSSEFloat64InsertHighWord32:
if (instr->InputAt(1)->IsRegister()) {
__ Pinsrd(i.OutputDoubleRegister(), i.InputRegister(1), 1);
} else {
__ Pinsrd(i.OutputDoubleRegister(), i.InputOperand(1), 1);
}
break;
case kSSEFloat64LoadLowWord32:
if (instr->InputAt(0)->IsRegister()) {
__ Movd(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Movd(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kAVXFloat32Cmp: {
CpuFeatureScope avx_scope(masm(), AVX);
if (instr->InputAt(1)->IsFPRegister()) {
__ vucomiss(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ vucomiss(i.InputDoubleRegister(0), i.InputOperand(1));
}
break;
}
case kAVXFloat32Add:
ASSEMBLE_AVX_BINOP(vaddss);
break;
case kAVXFloat32Sub:
ASSEMBLE_AVX_BINOP(vsubss);
break;
case kAVXFloat32Mul:
ASSEMBLE_AVX_BINOP(vmulss);
break;
case kAVXFloat32Div:
ASSEMBLE_AVX_BINOP(vdivss);
// 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 kAVXFloat64Cmp: {
CpuFeatureScope avx_scope(masm(), AVX);
if (instr->InputAt(1)->IsFPRegister()) {
__ vucomisd(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
__ vucomisd(i.InputDoubleRegister(0), i.InputOperand(1));
}
break;
}
case kAVXFloat64Add:
ASSEMBLE_AVX_BINOP(vaddsd);
break;
case kAVXFloat64Sub:
ASSEMBLE_AVX_BINOP(vsubsd);
break;
case kAVXFloat64Mul:
ASSEMBLE_AVX_BINOP(vmulsd);
break;
case kAVXFloat64Div:
ASSEMBLE_AVX_BINOP(vdivsd);
// Don't delete this mov. It may improve performance on some CPUs,
// when there is a (v)mulsd depending on the result.
__ Movapd(i.OutputDoubleRegister(), i.OutputDoubleRegister());
break;
case kAVXFloat32Abs: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
CpuFeatureScope avx_scope(masm(), AVX);
__ vpcmpeqd(kScratchDoubleReg, kScratchDoubleReg, kScratchDoubleReg);
__ vpsrlq(kScratchDoubleReg, kScratchDoubleReg, 33);
if (instr->InputAt(0)->IsFPRegister()) {
__ vandps(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputDoubleRegister(0));
} else {
__ vandps(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputOperand(0));
}
break;
}
case kAVXFloat32Neg: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
CpuFeatureScope avx_scope(masm(), AVX);
__ vpcmpeqd(kScratchDoubleReg, kScratchDoubleReg, kScratchDoubleReg);
__ vpsllq(kScratchDoubleReg, kScratchDoubleReg, 31);
if (instr->InputAt(0)->IsFPRegister()) {
__ vxorps(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputDoubleRegister(0));
} else {
__ vxorps(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputOperand(0));
}
break;
}
case kAVXFloat64Abs: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
CpuFeatureScope avx_scope(masm(), AVX);
__ vpcmpeqd(kScratchDoubleReg, kScratchDoubleReg, kScratchDoubleReg);
__ vpsrlq(kScratchDoubleReg, kScratchDoubleReg, 1);
if (instr->InputAt(0)->IsFPRegister()) {
__ vandpd(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputDoubleRegister(0));
} else {
__ vandpd(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputOperand(0));
}
break;
}
case kAVXFloat64Neg: {
// TODO(bmeurer): Use RIP relative 128-bit constants.
CpuFeatureScope avx_scope(masm(), AVX);
__ vpcmpeqd(kScratchDoubleReg, kScratchDoubleReg, kScratchDoubleReg);
__ vpsllq(kScratchDoubleReg, kScratchDoubleReg, 63);
if (instr->InputAt(0)->IsFPRegister()) {
__ vxorpd(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputDoubleRegister(0));
} else {
__ vxorpd(i.OutputDoubleRegister(), kScratchDoubleReg,
i.InputOperand(0));
}
break;
}
case kSSEFloat64SilenceNaN:
__ Xorpd(kScratchDoubleReg, kScratchDoubleReg);
__ Subsd(i.InputDoubleRegister(0), kScratchDoubleReg);
break;
case kX64Movsxbl:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movsxbl);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movzxbl:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movzxbl);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movsxbq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movsxbq);
break;
case kX64Movzxbq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movzxbq);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movb: {
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
if (HasImmediateInput(instr, index)) {
__ movb(operand, Immediate(i.InputInt8(index)));
} else {
__ movb(operand, i.InputRegister(index));
}
break;
}
case kX64Movsxwl:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movsxwl);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movzxwl:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movzxwl);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movsxwq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movsxwq);
break;
case kX64Movzxwq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movzxwq);
__ AssertZeroExtended(i.OutputRegister());
break;
case kX64Movw: {
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
if (HasImmediateInput(instr, index)) {
__ movw(operand, Immediate(i.InputInt16(index)));
} else {
__ movw(operand, i.InputRegister(index));
}
break;
}
case kX64Movl:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
if (instr->HasOutput()) {
if (instr->addressing_mode() == kMode_None) {
if (instr->InputAt(0)->IsRegister()) {
__ movl(i.OutputRegister(), i.InputRegister(0));
} else {
__ movl(i.OutputRegister(), i.InputOperand(0));
}
} else {
__ movl(i.OutputRegister(), i.MemoryOperand());
}
__ AssertZeroExtended(i.OutputRegister());
} else {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
if (HasImmediateInput(instr, index)) {
__ movl(operand, i.InputImmediate(index));
} else {
__ movl(operand, i.InputRegister(index));
}
}
break;
case kX64Movsxlq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
ASSEMBLE_MOVX(movsxlq);
break;
case kX64Movq:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
if (instr->HasOutput()) {
__ movq(i.OutputRegister(), i.MemoryOperand());
} else {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
if (HasImmediateInput(instr, index)) {
__ movq(operand, i.InputImmediate(index));
} else {
__ movq(operand, i.InputRegister(index));
}
}
break;
case kX64Movss:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
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 kX64Movsd:
EmitOOLTrapIfNeeded(zone(), this, opcode, instr->InputCount(), i,
__ pc_offset(), instr);
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 kX64BitcastFI:
if (instr->InputAt(0)->IsFPStackSlot()) {
__ movl(i.OutputRegister(), i.InputOperand(0));
} else {
__ Movd(i.OutputRegister(), i.InputDoubleRegister(0));
}
break;
case kX64BitcastDL:
if (instr->InputAt(0)->IsFPStackSlot()) {
__ movq(i.OutputRegister(), i.InputOperand(0));
} else {
__ Movq(i.OutputRegister(), i.InputDoubleRegister(0));
}
break;
case kX64BitcastIF:
if (instr->InputAt(0)->IsRegister()) {
__ Movd(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ movss(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kX64BitcastLD:
if (instr->InputAt(0)->IsRegister()) {
__ Movq(i.OutputDoubleRegister(), i.InputRegister(0));
} else {
__ Movsd(i.OutputDoubleRegister(), i.InputOperand(0));
}
break;
case kX64Lea32: {
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 (i.InputRegister(0).is(i.OutputRegister())) {
if (mode == kMode_MRI) {
int32_t constant_summand = i.InputInt32(1);
if (constant_summand > 0) {
__ addl(i.OutputRegister(), Immediate(constant_summand));
} else if (constant_summand < 0) {
__ subl(i.OutputRegister(), Immediate(-constant_summand));
}
} else if (mode == kMode_MR1) {
if (i.InputRegister(1).is(i.OutputRegister())) {
__ shll(i.OutputRegister(), Immediate(1));
} else {
__ addl(i.OutputRegister(), i.InputRegister(1));
}
} else if (mode == kMode_M2) {
__ shll(i.OutputRegister(), Immediate(1));
} else if (mode == kMode_M4) {
__ shll(i.OutputRegister(), Immediate(2));
} else if (mode == kMode_M8) {
__ shll(i.OutputRegister(), Immediate(3));
} else {
__ leal(i.OutputRegister(), i.MemoryOperand());
}
} else if (mode == kMode_MR1 &&
i.InputRegister(1).is(i.OutputRegister())) {
__ addl(i.OutputRegister(), i.InputRegister(0));
} else {
__ leal(i.OutputRegister(), i.MemoryOperand());
}
__ AssertZeroExtended(i.OutputRegister());
break;
}
case kX64Lea: {
AddressingMode mode = AddressingModeField::decode(instr->opcode());
// Shorten "leaq" to "addq", "subq" or "shlq" if the register allocation
// and addressing mode just happens to work out. The "addq"/"subq" forms
// in these cases are faster based on measurements.
if (i.InputRegister(0).is(i.OutputRegister())) {
if (mode == kMode_MRI) {
int32_t constant_summand = i.InputInt32(1);
if (constant_summand > 0) {
__ addq(i.OutputRegister(), Immediate(constant_summand));
} else if (constant_summand < 0) {
__ subq(i.OutputRegister(), Immediate(-constant_summand));
}
} else if (mode == kMode_MR1) {
if (i.InputRegister(1).is(i.OutputRegister())) {
__ shlq(i.OutputRegister(), Immediate(1));
} else {
__ addq(i.OutputRegister(), i.InputRegister(1));
}
} else if (mode == kMode_M2) {
__ shlq(i.OutputRegister(), Immediate(1));
} else if (mode == kMode_M4) {
__ shlq(i.OutputRegister(), Immediate(2));
} else if (mode == kMode_M8) {
__ shlq(i.OutputRegister(), Immediate(3));
} else {
__ leaq(i.OutputRegister(), i.MemoryOperand());
}
} else if (mode == kMode_MR1 &&
i.InputRegister(1).is(i.OutputRegister())) {
__ addq(i.OutputRegister(), i.InputRegister(0));
} else {
__ leaq(i.OutputRegister(), i.MemoryOperand());
}
break;
}
case kX64Dec32:
__ decl(i.OutputRegister());
break;
case kX64Inc32:
__ incl(i.OutputRegister());
break;
case kX64Push:
if (AddressingModeField::decode(instr->opcode()) != kMode_None) {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
__ pushq(operand);
frame_access_state()->IncreaseSPDelta(1);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
} else if (HasImmediateInput(instr, 0)) {
__ pushq(i.InputImmediate(0));
frame_access_state()->IncreaseSPDelta(1);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
} else if (instr->InputAt(0)->IsRegister()) {
__ pushq(i.InputRegister(0));
frame_access_state()->IncreaseSPDelta(1);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
} else if (instr->InputAt(0)->IsFPRegister()) {
// TODO(titzer): use another machine instruction?
__ subq(rsp, Immediate(kDoubleSize));
frame_access_state()->IncreaseSPDelta(kDoubleSize / kPointerSize);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kDoubleSize);
__ Movsd(Operand(rsp, 0), i.InputDoubleRegister(0));
} else {
__ pushq(i.InputOperand(0));
frame_access_state()->IncreaseSPDelta(1);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
}
break;
case kX64Poke: {
int const slot = MiscField::decode(instr->opcode());
if (HasImmediateInput(instr, 0)) {
__ movq(Operand(rsp, slot * kPointerSize), i.InputImmediate(0));
} else {
__ movq(Operand(rsp, slot * kPointerSize), i.InputRegister(0));
}
break;
}
case kX64Xchgb: {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
__ xchgb(i.InputRegister(index), operand);
break;
}
case kX64Xchgw: {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
__ xchgw(i.InputRegister(index), operand);
break;
}
case kX64Xchgl: {
size_t index = 0;
Operand operand = i.MemoryOperand(&index);
__ xchgl(i.InputRegister(index), operand);
break;
}
case kX64Int32x4Splat: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
XMMRegister dst = i.OutputSimd128Register();
__ Movd(dst, i.InputRegister(0));
__ shufps(dst, dst, 0x0);
break;
}
case kX64Int32x4ExtractLane: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
__ Pextrd(i.OutputRegister(), i.InputSimd128Register(0), i.InputInt8(1));
break;
}
case kX64Int32x4ReplaceLane: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
if (instr->InputAt(2)->IsRegister()) {
__ Pinsrd(i.OutputSimd128Register(), i.InputRegister(2),
i.InputInt8(1));
} else {
__ Pinsrd(i.OutputSimd128Register(), i.InputOperand(2), i.InputInt8(1));
}
break;
}
case kX64Int32x4Add: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
__ paddd(i.OutputSimd128Register(), i.InputSimd128Register(1));
break;
}
case kX64Int32x4Sub: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
__ psubd(i.OutputSimd128Register(), i.InputSimd128Register(1));
break;
}
case kX64Simd128Zero: {
CpuFeatureScope sse_scope(masm(), SSE4_1);
XMMRegister dst = i.OutputSimd128Register();
__ xorps(dst, dst);
break;
}
case kCheckedLoadInt8:
ASSEMBLE_CHECKED_LOAD_INTEGER(movsxbl);
break;
case kCheckedLoadUint8:
ASSEMBLE_CHECKED_LOAD_INTEGER(movzxbl);
break;
case kCheckedLoadInt16:
ASSEMBLE_CHECKED_LOAD_INTEGER(movsxwl);
break;
case kCheckedLoadUint16:
ASSEMBLE_CHECKED_LOAD_INTEGER(movzxwl);
break;
case kCheckedLoadWord32:
ASSEMBLE_CHECKED_LOAD_INTEGER(movl);
break;
case kCheckedLoadWord64:
ASSEMBLE_CHECKED_LOAD_INTEGER(movq);
break;
case kCheckedLoadFloat32:
ASSEMBLE_CHECKED_LOAD_FLOAT(Movss, OutOfLineLoadFloat32NaN);
break;
case kCheckedLoadFloat64:
ASSEMBLE_CHECKED_LOAD_FLOAT(Movsd, OutOfLineLoadFloat64NaN);
break;
case kCheckedStoreWord8:
ASSEMBLE_CHECKED_STORE_INTEGER(movb);
break;
case kCheckedStoreWord16:
ASSEMBLE_CHECKED_STORE_INTEGER(movw);
break;
case kCheckedStoreWord32:
ASSEMBLE_CHECKED_STORE_INTEGER(movl);
break;
case kCheckedStoreWord64:
ASSEMBLE_CHECKED_STORE_INTEGER(movq);
break;
case kCheckedStoreFloat32:
ASSEMBLE_CHECKED_STORE_FLOAT(Movss);
break;
case kCheckedStoreFloat64:
ASSEMBLE_CHECKED_STORE_FLOAT(Movsd);
break;
case kX64StackCheck:
__ CompareRoot(rsp, Heap::kStackLimitRootIndex);
break;
case kAtomicLoadInt8:
case kAtomicLoadUint8:
case kAtomicLoadInt16:
case kAtomicLoadUint16:
case kAtomicLoadWord32:
case kAtomicStoreWord8:
case kAtomicStoreWord16:
case kAtomicStoreWord32:
UNREACHABLE(); // Won't be generated by instruction selector.
break;
}
return kSuccess;
} // NOLINT(readability/fn_size)
namespace {
Condition FlagsConditionToCondition(FlagsCondition condition) {
switch (condition) {
case kUnorderedEqual:
case kEqual:
return equal;
case kUnorderedNotEqual:
case kNotEqual:
return not_equal;
case kSignedLessThan:
return less;
case kSignedGreaterThanOrEqual:
return greater_equal;
case kSignedLessThanOrEqual:
return less_equal;
case kSignedGreaterThan:
return greater;
case kUnsignedLessThan:
return below;
case kUnsignedGreaterThanOrEqual:
return above_equal;
case kUnsignedLessThanOrEqual:
return below_equal;
case kUnsignedGreaterThan:
return above;
case kOverflow:
return overflow;
case kNotOverflow:
return no_overflow;
default:
break;
}
UNREACHABLE();
return no_condition;
}
} // namespace
// Assembles branches after this instruction.
void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
Label::Distance flabel_distance =
branch->fallthru ? Label::kNear : Label::kFar;
Label* tlabel = branch->true_label;
Label* flabel = branch->false_label;
if (branch->condition == kUnorderedEqual) {
__ j(parity_even, flabel, flabel_distance);
} else if (branch->condition == kUnorderedNotEqual) {
__ j(parity_even, tlabel);
}
__ j(FlagsConditionToCondition(branch->condition), tlabel);
if (!branch->fallthru) __ jmp(flabel, flabel_distance);
}
void CodeGenerator::AssembleArchJump(RpoNumber target) {
if (!IsNextInAssemblyOrder(target)) __ jmp(GetLabel(target));
}
void CodeGenerator::AssembleArchTrap(Instruction* instr,
FlagsCondition condition) {
class OutOfLineTrap final : public OutOfLineCode {
public:
OutOfLineTrap(CodeGenerator* gen, bool frame_elided, Instruction* instr)
: OutOfLineCode(gen),
frame_elided_(frame_elided),
instr_(instr),
gen_(gen) {}
void Generate() final {
X64OperandConverter i(gen_, instr_);
Builtins::Name trap_id =
static_cast<Builtins::Name>(i.InputInt32(instr_->InputCount() - 1));
bool old_has_frame = __ has_frame();
if (frame_elided_) {
__ set_has_frame(true);
__ EnterFrame(StackFrame::WASM_COMPILED);
}
GenerateCallToTrap(trap_id);
if (frame_elided_) {
__ set_has_frame(old_has_frame);
}
}
private:
void GenerateCallToTrap(Builtins::Name trap_id) {
if (trap_id == Builtins::builtin_count) {
// We cannot test calls to the runtime in cctest/test-run-wasm.
// Therefore we emit a call to C here instead of a call to the runtime.
__ PrepareCallCFunction(0);
__ CallCFunction(
ExternalReference::wasm_call_trap_callback_for_testing(isolate()),
0);
__ LeaveFrame(StackFrame::WASM_COMPILED);
__ Ret();
} else {
gen_->AssembleSourcePosition(instr_);
__ Call(handle(isolate()->builtins()->builtin(trap_id), isolate()),
RelocInfo::CODE_TARGET);
ReferenceMap* reference_map =
new (gen_->zone()) ReferenceMap(gen_->zone());
gen_->RecordSafepoint(reference_map, Safepoint::kSimple, 0,
Safepoint::kNoLazyDeopt);
if (FLAG_debug_code) {
__ ud2();
}
}
}
bool frame_elided_;
Instruction* instr_;
CodeGenerator* gen_;
};
bool frame_elided = !frame_access_state()->has_frame();
auto ool = new (zone()) OutOfLineTrap(this, frame_elided, instr);
Label* tlabel = ool->entry();
Label end;
if (condition == kUnorderedEqual) {
__ j(parity_even, &end);
} else if (condition == kUnorderedNotEqual) {
__ j(parity_even, tlabel);
}
__ j(FlagsConditionToCondition(condition), tlabel);
__ bind(&end);
}
// Assembles boolean materializations after this instruction.
void CodeGenerator::AssembleArchBoolean(Instruction* instr,
FlagsCondition condition) {
X64OperandConverter i(this, instr);
Label done;
// Materialize a full 64-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);
if (condition == kUnorderedEqual) {
__ j(parity_odd, &check, Label::kNear);
__ movl(reg, Immediate(0));
__ jmp(&done, Label::kNear);
} else if (condition == kUnorderedNotEqual) {
__ j(parity_odd, &check, Label::kNear);
__ movl(reg, Immediate(1));
__ jmp(&done, Label::kNear);
}
__ bind(&check);
__ setcc(FlagsConditionToCondition(condition), reg);
__ movzxbl(reg, reg);
__ bind(&done);
}
void CodeGenerator::AssembleArchLookupSwitch(Instruction* instr) {
X64OperandConverter i(this, instr);
Register input = i.InputRegister(0);
for (size_t index = 2; index < instr->InputCount(); index += 2) {
__ cmpl(input, Immediate(i.InputInt32(index + 0)));
__ j(equal, GetLabel(i.InputRpo(index + 1)));
}
AssembleArchJump(i.InputRpo(1));
}
void CodeGenerator::AssembleArchTableSwitch(Instruction* instr) {
X64OperandConverter i(this, instr);
Register input = i.InputRegister(0);
int32_t const case_count = static_cast<int32_t>(instr->InputCount() - 2);
Label** cases = zone()->NewArray<Label*>(case_count);
for (int32_t index = 0; index < case_count; ++index) {
cases[index] = GetLabel(i.InputRpo(index + 2));
}
Label* const table = AddJumpTable(cases, case_count);
__ cmpl(input, Immediate(case_count));
__ j(above_equal, GetLabel(i.InputRpo(1)));
__ leaq(kScratchRegister, Operand(table));
__ jmp(Operand(kScratchRegister, input, times_8, 0));
}
CodeGenerator::CodeGenResult CodeGenerator::AssembleDeoptimizerCall(
int deoptimization_id, SourcePosition pos) {
DeoptimizeKind deoptimization_kind = GetDeoptimizationKind(deoptimization_id);
DeoptimizeReason deoptimization_reason =
GetDeoptimizationReason(deoptimization_id);
Deoptimizer::BailoutType bailout_type =
deoptimization_kind == DeoptimizeKind::kSoft ? Deoptimizer::SOFT
: Deoptimizer::EAGER;
Address deopt_entry = Deoptimizer::GetDeoptimizationEntry(
isolate(), deoptimization_id, bailout_type);
if (deopt_entry == nullptr) return kTooManyDeoptimizationBailouts;
__ RecordDeoptReason(deoptimization_reason, pos, deoptimization_id);
__ call(deopt_entry, RelocInfo::RUNTIME_ENTRY);
return kSuccess;
}
namespace {
static const int kQuadWordSize = 16;
} // namespace
void CodeGenerator::FinishFrame(Frame* frame) {
CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
const RegList saves_fp = descriptor->CalleeSavedFPRegisters();
if (saves_fp != 0) {
frame->AlignSavedCalleeRegisterSlots();
if (saves_fp != 0) { // Save callee-saved XMM registers.
const uint32_t saves_fp_count = base::bits::CountPopulation32(saves_fp);
frame->AllocateSavedCalleeRegisterSlots(saves_fp_count *
(kQuadWordSize / kPointerSize));
}
}
const RegList saves = descriptor->CalleeSavedRegisters();
if (saves != 0) { // Save callee-saved registers.
int count = 0;
for (int i = Register::kNumRegisters - 1; i >= 0; i--) {
if (((1 << i) & saves)) {
++count;
}
}
frame->AllocateSavedCalleeRegisterSlots(count);
}
}
void CodeGenerator::AssembleConstructFrame() {
CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
if (frame_access_state()->has_frame()) {
int pc_base = __ pc_offset();
if (descriptor->IsCFunctionCall()) {
__ pushq(rbp);
__ movq(rbp, rsp);
} else if (descriptor->IsJSFunctionCall()) {
__ Prologue(this->info()->GeneratePreagedPrologue());
if (descriptor->PushArgumentCount()) {
__ pushq(kJavaScriptCallArgCountRegister);
}
} else {
__ StubPrologue(info()->GetOutputStackFrameType());
}
if (!descriptor->IsJSFunctionCall() || !info()->GeneratePreagedPrologue()) {
unwinding_info_writer_.MarkFrameConstructed(pc_base);
}
}
int shrink_slots =
frame()->GetTotalFrameSlotCount() - descriptor->CalculateFixedFrameSize();
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();
shrink_slots -= static_cast<int>(OsrHelper(info()).UnoptimizedFrameSlots());
}
const RegList saves_fp = descriptor->CalleeSavedFPRegisters();
if (shrink_slots > 0) {
__ subq(rsp, Immediate(shrink_slots * kPointerSize));
}
if (saves_fp != 0) { // Save callee-saved XMM registers.
const uint32_t saves_fp_count = base::bits::CountPopulation32(saves_fp);
const int stack_size = saves_fp_count * kQuadWordSize;
// Adjust the stack pointer.
__ subp(rsp, Immediate(stack_size));
// Store the registers on the stack.
int slot_idx = 0;
for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) {
if (!((1 << i) & saves_fp)) continue;
__ movdqu(Operand(rsp, kQuadWordSize * slot_idx),
XMMRegister::from_code(i));
slot_idx++;
}
}
const RegList saves = descriptor->CalleeSavedRegisters();
if (saves != 0) { // Save callee-saved registers.
for (int i = Register::kNumRegisters - 1; i >= 0; i--) {
if (!((1 << i) & saves)) continue;
__ pushq(Register::from_code(i));
}
}
}
void CodeGenerator::AssembleReturn(InstructionOperand* pop) {
CallDescriptor* descriptor = linkage()->GetIncomingDescriptor();
// Restore registers.
const RegList saves = descriptor->CalleeSavedRegisters();
if (saves != 0) {
for (int i = 0; i < Register::kNumRegisters; i++) {
if (!((1 << i) & saves)) continue;
__ popq(Register::from_code(i));
}
}
const RegList saves_fp = descriptor->CalleeSavedFPRegisters();
if (saves_fp != 0) {
const uint32_t saves_fp_count = base::bits::CountPopulation32(saves_fp);
const int stack_size = saves_fp_count * kQuadWordSize;
// Load the registers from the stack.
int slot_idx = 0;
for (int i = 0; i < XMMRegister::kMaxNumRegisters; i++) {
if (!((1 << i) & saves_fp)) continue;
__ movdqu(XMMRegister::from_code(i),
Operand(rsp, kQuadWordSize * slot_idx));
slot_idx++;
}
// Adjust the stack pointer.
__ addp(rsp, Immediate(stack_size));
}
unwinding_info_writer_.MarkBlockWillExit();
// Might need rcx for scratch if pop_size is too big or if there is a variable
// pop count.
DCHECK_EQ(0u, descriptor->CalleeSavedRegisters() & rcx.bit());
DCHECK_EQ(0u, descriptor->CalleeSavedRegisters() & rdx.bit());
size_t pop_size = descriptor->StackParameterCount() * kPointerSize;
X64OperandConverter g(this, nullptr);
if (descriptor->IsCFunctionCall()) {
AssembleDeconstructFrame();
} else if (frame_access_state()->has_frame()) {
if (pop->IsImmediate() && g.ToConstant(pop).ToInt32() == 0) {
// Canonicalize JSFunction return sites for now.
if (return_label_.is_bound()) {
__ jmp(&return_label_);
return;
} else {
__ bind(&return_label_);
AssembleDeconstructFrame();
}
} else {
AssembleDeconstructFrame();
}
}
if (pop->IsImmediate()) {
DCHECK_EQ(Constant::kInt32, g.ToConstant(pop).type());
pop_size += g.ToConstant(pop).ToInt32() * kPointerSize;
CHECK_LT(pop_size, static_cast<size_t>(std::numeric_limits<int>::max()));
__ Ret(static_cast<int>(pop_size), rcx);
} else {
Register pop_reg = g.ToRegister(pop);
Register scratch_reg = pop_reg.is(rcx) ? rdx : rcx;
__ popq(scratch_reg);
__ leaq(rsp, Operand(rsp, pop_reg, times_8, static_cast<int>(pop_size)));
__ jmp(scratch_reg);
}
}
void CodeGenerator::AssembleMove(InstructionOperand* source,
InstructionOperand* destination) {
X64OperandConverter 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);
if (destination->IsRegister()) {
__ movq(g.ToRegister(destination), src);
} else {
__ movq(g.ToOperand(destination), src);
}
} else if (source->IsStackSlot()) {
DCHECK(destination->IsRegister() || destination->IsStackSlot());
Operand src = g.ToOperand(source);
if (destination->IsRegister()) {
Register dst = g.ToRegister(destination);
__ movq(dst, src);
} else {
// Spill on demand to use a temporary register for memory-to-memory
// moves.
Register tmp = kScratchRegister;
Operand dst = g.ToOperand(destination);
__ movq(tmp, src);
__ movq(dst, tmp);
}
} else if (source->IsConstant()) {
ConstantOperand* constant_source = ConstantOperand::cast(source);
Constant src = g.ToConstant(constant_source);
if (destination->IsRegister() || destination->IsStackSlot()) {
Register dst = destination->IsRegister() ? g.ToRegister(destination)
: kScratchRegister;
switch (src.type()) {
case Constant::kInt32: {
if (RelocInfo::IsWasmPtrReference(src.rmode())) {
__ movq(dst, src.ToInt64(), src.rmode());
} else {
// TODO(dcarney): don't need scratch in this case.
int32_t value = src.ToInt32();
if (value == 0) {
__ xorl(dst, dst);
} else {
if (RelocInfo::IsWasmSizeReference(src.rmode())) {
__ movl(dst, Immediate(value, src.rmode()));
} else {
__ movl(dst, Immediate(value));
}
}
}
break;
}
case Constant::kInt64:
if (RelocInfo::IsWasmPtrReference(src.rmode())) {
__ movq(dst, src.ToInt64(), src.rmode());
} else {
DCHECK(!RelocInfo::IsWasmSizeReference(src.rmode()));
__ Set(dst, src.ToInt64());
}
break;
case Constant::kFloat32:
__ Move(dst,
isolate()->factory()->NewNumber(src.ToFloat32(), TENURED));
break;
case Constant::kFloat64:
__ Move(dst,
isolate()->factory()->NewNumber(src.ToFloat64(), TENURED));
break;
case Constant::kExternalReference:
__ Move(dst, src.ToExternalReference());
break;
case Constant::kHeapObject: {
Handle<HeapObject> src_object = src.ToHeapObject();
Heap::RootListIndex index;
if (IsMaterializableFromRoot(src_object, &index)) {
__ LoadRoot(dst, index);
} else {
__ Move(dst, src_object);
}
break;
}
case Constant::kRpoNumber:
UNREACHABLE(); // TODO(dcarney): load of labels on x64.
break;
}
if (destination->IsStackSlot()) {
__ movq(g.ToOperand(destination), kScratchRegister);
}
} else if (src.type() == Constant::kFloat32) {
// TODO(turbofan): Can we do better here?
uint32_t src_const = bit_cast<uint32_t>(src.ToFloat32());
if (destination->IsFPRegister()) {
__ Move(g.ToDoubleRegister(destination), src_const);
} else {
DCHECK(destination->IsFPStackSlot());
Operand dst = g.ToOperand(destination);
__ movl(dst, Immediate(src_const));
}
} else {
DCHECK_EQ(Constant::kFloat64, src.type());
uint64_t src_const = bit_cast<uint64_t>(src.ToFloat64());
if (destination->IsFPRegister()) {
__ Move(g.ToDoubleRegister(destination), src_const);
} else {
DCHECK(destination->IsFPStackSlot());
__ movq(kScratchRegister, src_const);
__ movq(g.ToOperand(destination), kScratchRegister);
}
}
} else if (source->IsFPRegister()) {
XMMRegister src = g.ToDoubleRegister(source);
if (destination->IsFPRegister()) {
XMMRegister dst = g.ToDoubleRegister(destination);
__ Movapd(dst, src);
} else {
DCHECK(destination->IsFPStackSlot());
Operand dst = g.ToOperand(destination);
MachineRepresentation rep =
LocationOperand::cast(source)->representation();
if (rep != MachineRepresentation::kSimd128) {
__ Movsd(dst, src);
} else {
__ Movups(dst, src);
}
}
} else if (source->IsFPStackSlot()) {
DCHECK(destination->IsFPRegister() || destination->IsFPStackSlot());
Operand src = g.ToOperand(source);
MachineRepresentation rep = LocationOperand::cast(source)->representation();
if (destination->IsFPRegister()) {
XMMRegister dst = g.ToDoubleRegister(destination);
if (rep != MachineRepresentation::kSimd128) {
__ Movsd(dst, src);
} else {
__ Movups(dst, src);
}
} else {
Operand dst = g.ToOperand(destination);
if (rep != MachineRepresentation::kSimd128) {
__ Movsd(kScratchDoubleReg, src);
__ Movsd(dst, kScratchDoubleReg);
} else {
__ Movups(kScratchDoubleReg, src);
__ Movups(dst, kScratchDoubleReg);
}
}
} else {
UNREACHABLE();
}
}
void CodeGenerator::AssembleSwap(InstructionOperand* source,
InstructionOperand* destination) {
X64OperandConverter 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);
__ movq(kScratchRegister, src);
__ movq(src, dst);
__ movq(dst, kScratchRegister);
} else if (source->IsRegister() && destination->IsStackSlot()) {
Register src = g.ToRegister(source);
__ pushq(src);
frame_access_state()->IncreaseSPDelta(1);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
Operand dst = g.ToOperand(destination);
__ movq(src, dst);
frame_access_state()->IncreaseSPDelta(-1);
dst = g.ToOperand(destination);
__ popq(dst);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
-kPointerSize);
} else if ((source->IsStackSlot() && destination->IsStackSlot()) ||
(source->IsFPStackSlot() && destination->IsFPStackSlot())) {
// Memory-memory.
Operand src = g.ToOperand(source);
Operand dst = g.ToOperand(destination);
MachineRepresentation rep = LocationOperand::cast(source)->representation();
if (rep != MachineRepresentation::kSimd128) {
Register tmp = kScratchRegister;
__ movq(tmp, dst);
__ pushq(src);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
kPointerSize);
frame_access_state()->IncreaseSPDelta(1);
src = g.ToOperand(source);
__ movq(src, tmp);
frame_access_state()->IncreaseSPDelta(-1);
dst = g.ToOperand(destination);
__ popq(dst);
unwinding_info_writer_.MaybeIncreaseBaseOffsetAt(__ pc_offset(),
-kPointerSize);
} else {
// Use the XOR trick to swap without a temporary.
__ Movups(kScratchDoubleReg, src);
__ Xorps(kScratchDoubleReg, dst); // scratch contains src ^ dst.
__ Movups(src, kScratchDoubleReg);
__ Xorps(kScratchDoubleReg, dst); // scratch contains src.
__ Movups(dst, kScratchDoubleReg);
__ Xorps(kScratchDoubleReg, src); // scratch contains dst.
__ Movups(src, kScratchDoubleReg);
}
} else if (source->IsFPRegister() && destination->IsFPRegister()) {
// XMM register-register swap.
XMMRegister src = g.ToDoubleRegister(source);
XMMRegister dst = g.ToDoubleRegister(destination);
__ Movapd(kScratchDoubleReg, src);
__ Movapd(src, dst);
__ Movapd(dst, kScratchDoubleReg);
} else if (source->IsFPRegister() && destination->IsFPStackSlot()) {
// XMM register-memory swap.
XMMRegister src = g.ToDoubleRegister(source);
Operand dst = g.ToOperand(destination);
MachineRepresentation rep = LocationOperand::cast(source)->representation();
if (rep != MachineRepresentation::kSimd128) {
__ Movsd(kScratchDoubleReg, src);
__ Movsd(src, dst);
__ Movsd(dst, kScratchDoubleReg);
} else {
__ Movups(kScratchDoubleReg, src);
__ Movups(src, dst);
__ Movups(dst, 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) {
__ dq(targets[index]);
}
}
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 = __ 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