blob: c5356185c98d8813d28ccbaa851ee130a9a287c0 [file] [log] [blame]
// Copyright 2014 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/arm64/assembler-arm64-inl.h"
#include "src/arm64/macro-assembler-arm64-inl.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/frame-constants.h"
#include "src/heap/heap-inl.h"
#include "src/optimized-compilation-info.h"
#include "src/wasm/wasm-objects.h"
namespace v8 {
namespace internal {
namespace compiler {
#define __ tasm()->
// Adds Arm64-specific methods to convert InstructionOperands.
class Arm64OperandConverter final : public InstructionOperandConverter {
public:
Arm64OperandConverter(CodeGenerator* gen, Instruction* instr)
: InstructionOperandConverter(gen, instr) {}
DoubleRegister InputFloat32Register(size_t index) {
return InputDoubleRegister(index).S();
}
DoubleRegister InputFloat64Register(size_t index) {
return InputDoubleRegister(index);
}
DoubleRegister InputSimd128Register(size_t index) {
return InputDoubleRegister(index).Q();
}
CPURegister InputFloat32OrZeroRegister(size_t index) {
if (instr_->InputAt(index)->IsImmediate()) {
DCHECK_EQ(0, bit_cast<int32_t>(InputFloat32(index)));
return wzr;
}
DCHECK(instr_->InputAt(index)->IsFPRegister());
return InputDoubleRegister(index).S();
}
CPURegister InputFloat64OrZeroRegister(size_t index) {
if (instr_->InputAt(index)->IsImmediate()) {
DCHECK_EQ(0, bit_cast<int64_t>(InputDouble(index)));
return xzr;
}
DCHECK(instr_->InputAt(index)->IsDoubleRegister());
return InputDoubleRegister(index);
}
size_t OutputCount() { return instr_->OutputCount(); }
DoubleRegister OutputFloat32Register() { return OutputDoubleRegister().S(); }
DoubleRegister OutputFloat64Register() { return OutputDoubleRegister(); }
DoubleRegister OutputSimd128Register() { return OutputDoubleRegister().Q(); }
Register InputRegister32(size_t index) {
return ToRegister(instr_->InputAt(index)).W();
}
Register InputOrZeroRegister32(size_t index) {
DCHECK(instr_->InputAt(index)->IsRegister() ||
(instr_->InputAt(index)->IsImmediate() && (InputInt32(index) == 0)));
if (instr_->InputAt(index)->IsImmediate()) {
return wzr;
}
return InputRegister32(index);
}
Register InputRegister64(size_t index) { return InputRegister(index); }
Register InputOrZeroRegister64(size_t index) {
DCHECK(instr_->InputAt(index)->IsRegister() ||
(instr_->InputAt(index)->IsImmediate() && (InputInt64(index) == 0)));
if (instr_->InputAt(index)->IsImmediate()) {
return xzr;
}
return InputRegister64(index);
}
Operand InputOperand(size_t index) {
return ToOperand(instr_->InputAt(index));
}
Operand InputOperand64(size_t index) { return InputOperand(index); }
Operand InputOperand32(size_t index) {
return ToOperand32(instr_->InputAt(index));
}
Register OutputRegister64() { return OutputRegister(); }
Register OutputRegister32() { return ToRegister(instr_->Output()).W(); }
Register TempRegister32(size_t index) {
return ToRegister(instr_->TempAt(index)).W();
}
Operand InputOperand2_32(size_t index) {
switch (AddressingModeField::decode(instr_->opcode())) {
case kMode_None:
return InputOperand32(index);
case kMode_Operand2_R_LSL_I:
return Operand(InputRegister32(index), LSL, InputInt5(index + 1));
case kMode_Operand2_R_LSR_I:
return Operand(InputRegister32(index), LSR, InputInt5(index + 1));
case kMode_Operand2_R_ASR_I:
return Operand(InputRegister32(index), ASR, InputInt5(index + 1));
case kMode_Operand2_R_ROR_I:
return Operand(InputRegister32(index), ROR, InputInt5(index + 1));
case kMode_Operand2_R_UXTB:
return Operand(InputRegister32(index), UXTB);
case kMode_Operand2_R_UXTH:
return Operand(InputRegister32(index), UXTH);
case kMode_Operand2_R_SXTB:
return Operand(InputRegister32(index), SXTB);
case kMode_Operand2_R_SXTH:
return Operand(InputRegister32(index), SXTH);
case kMode_Operand2_R_SXTW:
return Operand(InputRegister32(index), SXTW);
case kMode_MRI:
case kMode_MRR:
case kMode_Root:
break;
}
UNREACHABLE();
}
Operand InputOperand2_64(size_t index) {
switch (AddressingModeField::decode(instr_->opcode())) {
case kMode_None:
return InputOperand64(index);
case kMode_Operand2_R_LSL_I:
return Operand(InputRegister64(index), LSL, InputInt6(index + 1));
case kMode_Operand2_R_LSR_I:
return Operand(InputRegister64(index), LSR, InputInt6(index + 1));
case kMode_Operand2_R_ASR_I:
return Operand(InputRegister64(index), ASR, InputInt6(index + 1));
case kMode_Operand2_R_ROR_I:
return Operand(InputRegister64(index), ROR, InputInt6(index + 1));
case kMode_Operand2_R_UXTB:
return Operand(InputRegister64(index), UXTB);
case kMode_Operand2_R_UXTH:
return Operand(InputRegister64(index), UXTH);
case kMode_Operand2_R_SXTB:
return Operand(InputRegister64(index), SXTB);
case kMode_Operand2_R_SXTH:
return Operand(InputRegister64(index), SXTH);
case kMode_Operand2_R_SXTW:
return Operand(InputRegister64(index), SXTW);
case kMode_MRI:
case kMode_MRR:
case kMode_Root:
break;
}
UNREACHABLE();
}
MemOperand MemoryOperand(size_t index = 0) {
switch (AddressingModeField::decode(instr_->opcode())) {
case kMode_None:
case kMode_Operand2_R_LSR_I:
case kMode_Operand2_R_ASR_I:
case kMode_Operand2_R_ROR_I:
case kMode_Operand2_R_UXTB:
case kMode_Operand2_R_UXTH:
case kMode_Operand2_R_SXTB:
case kMode_Operand2_R_SXTH:
case kMode_Operand2_R_SXTW:
break;
case kMode_Root:
return MemOperand(kRootRegister, InputInt64(index));
case kMode_Operand2_R_LSL_I:
return MemOperand(InputRegister(index + 0), InputRegister(index + 1),
LSL, InputInt32(index + 2));
case kMode_MRI:
return MemOperand(InputRegister(index + 0), InputInt32(index + 1));
case kMode_MRR:
return MemOperand(InputRegister(index + 0), InputRegister(index + 1));
}
UNREACHABLE();
}
Operand ToOperand(InstructionOperand* op) {
if (op->IsRegister()) {
return Operand(ToRegister(op));
}
return ToImmediate(op);
}
Operand ToOperand32(InstructionOperand* op) {
if (op->IsRegister()) {
return Operand(ToRegister(op).W());
}
return ToImmediate(op);
}
Operand ToImmediate(InstructionOperand* operand) {
Constant constant = ToConstant(operand);
switch (constant.type()) {
case Constant::kInt32:
return Operand(constant.ToInt32());
case Constant::kInt64:
if (RelocInfo::IsWasmPtrReference(constant.rmode())) {
return Operand(constant.ToInt64(), constant.rmode());
} else {
return Operand(constant.ToInt64());
}
case Constant::kFloat32:
return Operand(Operand::EmbeddedNumber(constant.ToFloat32()));
case Constant::kFloat64:
return Operand(Operand::EmbeddedNumber(constant.ToFloat64().value()));
case Constant::kExternalReference:
return Operand(constant.ToExternalReference());
case Constant::kHeapObject:
return Operand(constant.ToHeapObject());
case Constant::kRpoNumber:
UNREACHABLE(); // TODO(dcarney): RPO immediates on arm64.
break;
}
UNREACHABLE();
}
MemOperand ToMemOperand(InstructionOperand* op, TurboAssembler* tasm) const {
DCHECK_NOT_NULL(op);
DCHECK(op->IsStackSlot() || op->IsFPStackSlot());
return SlotToMemOperand(AllocatedOperand::cast(op)->index(), tasm);
}
MemOperand SlotToMemOperand(int slot, TurboAssembler* tasm) const {
FrameOffset offset = frame_access_state()->GetFrameOffset(slot);
if (offset.from_frame_pointer()) {
int from_sp = offset.offset() + frame_access_state()->GetSPToFPOffset();
// Convert FP-offsets to SP-offsets if it results in better code.
if (Assembler::IsImmLSUnscaled(from_sp) ||
Assembler::IsImmLSScaled(from_sp, 3)) {
offset = FrameOffset::FromStackPointer(from_sp);
}
}
return MemOperand(offset.from_stack_pointer() ? sp : fp, offset.offset());
}
};
namespace {
class OutOfLineRecordWrite final : public OutOfLineCode {
public:
OutOfLineRecordWrite(CodeGenerator* gen, Register object, Operand index,
Register value, Register scratch0, Register scratch1,
RecordWriteMode mode,
UnwindingInfoWriter* unwinding_info_writer)
: OutOfLineCode(gen),
object_(object),
index_(index),
value_(value),
scratch0_(scratch0),
scratch1_(scratch1),
mode_(mode),
must_save_lr_(!gen->frame_access_state()->has_frame()),
unwinding_info_writer_(unwinding_info_writer),
zone_(gen->zone()) {}
void Generate() final {
if (mode_ > RecordWriteMode::kValueIsPointer) {
__ JumpIfSmi(value_, exit());
}
__ CheckPageFlagClear(value_, scratch0_,
MemoryChunk::kPointersToHereAreInterestingMask,
exit());
__ Add(scratch1_, object_, index_);
RememberedSetAction const remembered_set_action =
mode_ > RecordWriteMode::kValueIsMap ? EMIT_REMEMBERED_SET
: OMIT_REMEMBERED_SET;
SaveFPRegsMode const save_fp_mode =
frame()->DidAllocateDoubleRegisters() ? kSaveFPRegs : kDontSaveFPRegs;
if (must_save_lr_) {
// We need to save and restore lr if the frame was elided.
__ Push(lr, padreg);
unwinding_info_writer_->MarkLinkRegisterOnTopOfStack(__ pc_offset(), sp);
}
__ CallRecordWriteStub(object_, scratch1_, remembered_set_action,
save_fp_mode);
if (must_save_lr_) {
__ Pop(padreg, lr);
unwinding_info_writer_->MarkPopLinkRegisterFromTopOfStack(__ pc_offset());
}
}
private:
Register const object_;
Operand const index_;
Register const value_;
Register const scratch0_;
Register const scratch1_;
RecordWriteMode const mode_;
bool must_save_lr_;
UnwindingInfoWriter* const unwinding_info_writer_;
Zone* zone_;
};
Condition FlagsConditionToCondition(FlagsCondition condition) {
switch (condition) {
case kEqual:
return eq;
case kNotEqual:
return ne;
case kSignedLessThan:
return lt;
case kSignedGreaterThanOrEqual:
return ge;
case kSignedLessThanOrEqual:
return le;
case kSignedGreaterThan:
return gt;
case kUnsignedLessThan:
return lo;
case kUnsignedGreaterThanOrEqual:
return hs;
case kUnsignedLessThanOrEqual:
return ls;
case kUnsignedGreaterThan:
return hi;
case kFloatLessThanOrUnordered:
return lt;
case kFloatGreaterThanOrEqual:
return ge;
case kFloatLessThanOrEqual:
return ls;
case kFloatGreaterThanOrUnordered:
return hi;
case kFloatLessThan:
return lo;
case kFloatGreaterThanOrEqualOrUnordered:
return hs;
case kFloatLessThanOrEqualOrUnordered:
return le;
case kFloatGreaterThan:
return gt;
case kOverflow:
return vs;
case kNotOverflow:
return vc;
case kUnorderedEqual:
case kUnorderedNotEqual:
break;
case kPositiveOrZero:
return pl;
case kNegative:
return mi;
}
UNREACHABLE();
}
void EmitWordLoadPoisoningIfNeeded(CodeGenerator* codegen,
InstructionCode opcode, Instruction* instr,
Arm64OperandConverter& i) {
const MemoryAccessMode access_mode =
static_cast<MemoryAccessMode>(MiscField::decode(opcode));
if (access_mode == kMemoryAccessPoisoned) {
Register value = i.OutputRegister();
Register poison = value.Is64Bits() ? kSpeculationPoisonRegister
: kSpeculationPoisonRegister.W();
codegen->tasm()->And(value, value, Operand(poison));
}
}
} // namespace
#define ASSEMBLE_SHIFT(asm_instr, width) \
do { \
if (instr->InputAt(1)->IsRegister()) { \
__ asm_instr(i.OutputRegister##width(), i.InputRegister##width(0), \
i.InputRegister##width(1)); \
} else { \
uint32_t imm = \
static_cast<uint32_t>(i.InputOperand##width(1).ImmediateValue()); \
__ asm_instr(i.OutputRegister##width(), i.InputRegister##width(0), \
imm % (width)); \
} \
} while (0)
#define ASSEMBLE_ATOMIC_LOAD_INTEGER(asm_instr, reg) \
do { \
__ Add(i.TempRegister(0), i.InputRegister(0), i.InputRegister(1)); \
__ asm_instr(i.Output##reg(), i.TempRegister(0)); \
} while (0)
#define ASSEMBLE_ATOMIC_STORE_INTEGER(asm_instr, reg) \
do { \
__ Add(i.TempRegister(0), i.InputRegister(0), i.InputRegister(1)); \
__ asm_instr(i.Input##reg(2), i.TempRegister(0)); \
} while (0)
#define ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(load_instr, store_instr, reg) \
do { \
Label exchange; \
__ Add(i.TempRegister(0), i.InputRegister(0), i.InputRegister(1)); \
__ Bind(&exchange); \
__ load_instr(i.Output##reg(), i.TempRegister(0)); \
__ store_instr(i.TempRegister32(1), i.Input##reg(2), i.TempRegister(0)); \
__ Cbnz(i.TempRegister32(1), &exchange); \
} while (0)
#define ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(load_instr, store_instr, ext, \
reg) \
do { \
Label compareExchange; \
Label exit; \
__ Add(i.TempRegister(0), i.InputRegister(0), i.InputRegister(1)); \
__ Bind(&compareExchange); \
__ load_instr(i.Output##reg(), i.TempRegister(0)); \
__ Cmp(i.Output##reg(), Operand(i.Input##reg(2), ext)); \
__ B(ne, &exit); \
__ store_instr(i.TempRegister32(1), i.Input##reg(3), i.TempRegister(0)); \
__ Cbnz(i.TempRegister32(1), &compareExchange); \
__ Bind(&exit); \
} while (0)
#define ASSEMBLE_ATOMIC_BINOP(load_instr, store_instr, bin_instr, reg) \
do { \
Label binop; \
__ Add(i.TempRegister(0), i.InputRegister(0), i.InputRegister(1)); \
__ Bind(&binop); \
__ load_instr(i.Output##reg(), i.TempRegister(0)); \
__ bin_instr(i.Temp##reg(1), i.Output##reg(), Operand(i.Input##reg(2))); \
__ store_instr(i.TempRegister32(2), i.Temp##reg(1), i.TempRegister(0)); \
__ Cbnz(i.TempRegister32(2), &binop); \
} while (0)
#define ASSEMBLE_IEEE754_BINOP(name) \
do { \
FrameScope scope(tasm(), StackFrame::MANUAL); \
__ CallCFunction(ExternalReference::ieee754_##name##_function(), 0, 2); \
} while (0)
#define ASSEMBLE_IEEE754_UNOP(name) \
do { \
FrameScope scope(tasm(), StackFrame::MANUAL); \
__ CallCFunction(ExternalReference::ieee754_##name##_function(), 0, 1); \
} while (0)
void CodeGenerator::AssembleDeconstructFrame() {
__ Mov(sp, fp);
__ Pop(fp, lr);
unwinding_info_writer_.MarkFrameDeconstructed(__ pc_offset());
}
void CodeGenerator::AssemblePrepareTailCall() {
if (frame_access_state()->has_frame()) {
__ Ldr(lr, MemOperand(fp, StandardFrameConstants::kCallerPCOffset));
__ Ldr(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
}
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.
__ Ldr(scratch1, MemOperand(fp, StandardFrameConstants::kContextOffset));
__ Cmp(scratch1,
Operand(StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)));
__ B(ne, &done);
// Load arguments count from current arguments adaptor frame (note, it
// does not include receiver).
Register caller_args_count_reg = scratch1;
__ Ldr(caller_args_count_reg,
MemOperand(fp, ArgumentsAdaptorFrameConstants::kLengthOffset));
__ SmiUntag(caller_args_count_reg);
ParameterCount callee_args_count(args_reg);
__ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2,
scratch3);
__ bind(&done);
}
namespace {
void AdjustStackPointerForTailCall(TurboAssembler* tasm,
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;
DCHECK_EQ(stack_slot_delta % 2, 0);
if (stack_slot_delta > 0) {
tasm->Claim(stack_slot_delta);
state->IncreaseSPDelta(stack_slot_delta);
} else if (allow_shrinkage && stack_slot_delta < 0) {
tasm->Drop(-stack_slot_delta);
state->IncreaseSPDelta(stack_slot_delta);
}
}
} // namespace
void CodeGenerator::AssembleTailCallBeforeGap(Instruction* instr,
int first_unused_stack_slot) {
AdjustStackPointerForTailCall(tasm(), frame_access_state(),
first_unused_stack_slot, false);
}
void CodeGenerator::AssembleTailCallAfterGap(Instruction* instr,
int first_unused_stack_slot) {
DCHECK_EQ(first_unused_stack_slot % 2, 0);
AdjustStackPointerForTailCall(tasm(), frame_access_state(),
first_unused_stack_slot);
DCHECK(instr->IsTailCall());
InstructionOperandConverter g(this, instr);
int optional_padding_slot = g.InputInt32(instr->InputCount() - 2);
if (optional_padding_slot % 2) {
__ Poke(padreg, optional_padding_slot * kPointerSize);
}
}
// Check that {kJavaScriptCallCodeStartRegister} is correct.
void CodeGenerator::AssembleCodeStartRegisterCheck() {
UseScratchRegisterScope temps(tasm());
Register scratch = temps.AcquireX();
__ ComputeCodeStartAddress(scratch);
__ cmp(scratch, kJavaScriptCallCodeStartRegister);
__ Assert(eq, AbortReason::kWrongFunctionCodeStart);
}
// Check if the code object is marked for deoptimization. If it is, then it
// jumps to the CompileLazyDeoptimizedCode builtin. In order to do this we need
// to:
// 1. read from memory the word that contains that bit, which can be found in
// the flags in the referenced {CodeDataContainer} object;
// 2. test kMarkedForDeoptimizationBit in those flags; and
// 3. if it is not zero then it jumps to the builtin.
void CodeGenerator::BailoutIfDeoptimized() {
UseScratchRegisterScope temps(tasm());
Register scratch = temps.AcquireX();
int offset = Code::kCodeDataContainerOffset - Code::kHeaderSize;
__ Ldr(scratch, MemOperand(kJavaScriptCallCodeStartRegister, offset));
__ Ldr(scratch,
FieldMemOperand(scratch, CodeDataContainer::kKindSpecificFlagsOffset));
Label not_deoptimized;
__ Tbz(scratch, Code::kMarkedForDeoptimizationBit, &not_deoptimized);
// Ensure we're not serializing (otherwise we'd need to use an indirection to
// access the builtin below).
DCHECK(!isolate()->ShouldLoadConstantsFromRootList());
Handle<Code> code = isolate()->builtins()->builtin_handle(
Builtins::kCompileLazyDeoptimizedCode);
__ Jump(code, RelocInfo::CODE_TARGET);
__ Bind(&not_deoptimized);
}
void CodeGenerator::GenerateSpeculationPoisonFromCodeStartRegister() {
UseScratchRegisterScope temps(tasm());
Register scratch = temps.AcquireX();
// Set a mask which has all bits set in the normal case, but has all
// bits cleared if we are speculatively executing the wrong PC.
__ ComputeCodeStartAddress(scratch);
__ Cmp(kJavaScriptCallCodeStartRegister, scratch);
__ Csetm(kSpeculationPoisonRegister, eq);
__ Csdb();
}
void CodeGenerator::AssembleRegisterArgumentPoisoning() {
UseScratchRegisterScope temps(tasm());
Register scratch = temps.AcquireX();
__ Mov(scratch, sp);
__ And(kJSFunctionRegister, kJSFunctionRegister, kSpeculationPoisonRegister);
__ And(kContextRegister, kContextRegister, kSpeculationPoisonRegister);
__ And(scratch, scratch, kSpeculationPoisonRegister);
__ Mov(sp, scratch);
}
// Assembles an instruction after register allocation, producing machine code.
CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
Instruction* instr) {
Arm64OperandConverter i(this, instr);
InstructionCode opcode = instr->opcode();
ArchOpcode arch_opcode = ArchOpcodeField::decode(opcode);
switch (arch_opcode) {
case kArchCallCodeObject: {
if (instr->InputAt(0)->IsImmediate()) {
__ Call(i.InputCode(0), RelocInfo::CODE_TARGET);
} else {
Register reg = i.InputRegister(0);
DCHECK_IMPLIES(
HasCallDescriptorFlag(instr, CallDescriptor::kFixedTargetRegister),
reg == kJavaScriptCallCodeStartRegister);
__ Add(reg, reg, Code::kHeaderSize - kHeapObjectTag);
__ Call(reg);
}
RecordCallPosition(instr);
frame_access_state()->ClearSPDelta();
break;
}
case kArchCallWasmFunction: {
if (instr->InputAt(0)->IsImmediate()) {
Constant constant = i.ToConstant(instr->InputAt(0));
Address wasm_code = static_cast<Address>(constant.ToInt64());
__ Call(wasm_code, constant.rmode());
} else {
Register target = i.InputRegister(0);
__ Call(target);
}
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 (instr->InputAt(0)->IsImmediate()) {
__ Jump(i.InputCode(0), RelocInfo::CODE_TARGET);
} else {
Register reg = i.InputRegister(0);
DCHECK_IMPLIES(
HasCallDescriptorFlag(instr, CallDescriptor::kFixedTargetRegister),
reg == kJavaScriptCallCodeStartRegister);
__ Add(reg, reg, Code::kHeaderSize - kHeapObjectTag);
__ Jump(reg);
}
unwinding_info_writer_.MarkBlockWillExit();
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
break;
}
case kArchTailCallWasm: {
if (instr->InputAt(0)->IsImmediate()) {
Constant constant = i.ToConstant(instr->InputAt(0));
Address wasm_code = static_cast<Address>(constant.ToInt64());
__ Jump(wasm_code, constant.rmode());
} else {
Register target = i.InputRegister(0);
__ Jump(target);
}
unwinding_info_writer_.MarkBlockWillExit();
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
break;
}
case kArchTailCallAddress: {
CHECK(!instr->InputAt(0)->IsImmediate());
Register reg = i.InputRegister(0);
DCHECK_IMPLIES(
HasCallDescriptorFlag(instr, CallDescriptor::kFixedTargetRegister),
reg == kJavaScriptCallCodeStartRegister);
__ Jump(reg);
unwinding_info_writer_.MarkBlockWillExit();
frame_access_state()->ClearSPDelta();
frame_access_state()->SetFrameAccessToDefault();
break;
}
case kArchCallJSFunction: {
Register func = i.InputRegister(0);
if (FLAG_debug_code) {
// Check the function's context matches the context argument.
UseScratchRegisterScope scope(tasm());
Register temp = scope.AcquireX();
__ Ldr(temp, FieldMemOperand(func, JSFunction::kContextOffset));
__ cmp(cp, temp);
__ Assert(eq, AbortReason::kWrongFunctionContext);
}
static_assert(kJavaScriptCallCodeStartRegister == x2, "ABI mismatch");
__ Ldr(x2, FieldMemOperand(func, JSFunction::kCodeOffset));
__ Add(x2, x2, Operand(Code::kHeaderSize - kHeapObjectTag));
__ Call(x2);
RecordCallPosition(instr);
frame_access_state()->ClearSPDelta();
break;
}
case kArchPrepareCallCFunction:
// We don't need kArchPrepareCallCFunction on arm64 as the instruction
// selector has already performed a Claim to reserve space on the stack.
// Frame alignment is always 16 bytes, and the stack pointer is already
// 16-byte aligned, therefore we do not need to align the stack pointer
// by an unknown value, and it is safe to continue accessing the frame
// via the stack pointer.
UNREACHABLE();
break;
case kArchSaveCallerRegisters: {
fp_mode_ =
static_cast<SaveFPRegsMode>(MiscField::decode(instr->opcode()));
DCHECK(fp_mode_ == kDontSaveFPRegs || fp_mode_ == kSaveFPRegs);
// kReturnRegister0 should have been saved before entering the stub.
int bytes = __ PushCallerSaved(fp_mode_, kReturnRegister0);
DCHECK_EQ(0, bytes % kPointerSize);
DCHECK_EQ(0, frame_access_state()->sp_delta());
frame_access_state()->IncreaseSPDelta(bytes / kPointerSize);
DCHECK(!caller_registers_saved_);
caller_registers_saved_ = true;
break;
}
case kArchRestoreCallerRegisters: {
DCHECK(fp_mode_ ==
static_cast<SaveFPRegsMode>(MiscField::decode(instr->opcode())));
DCHECK(fp_mode_ == kDontSaveFPRegs || fp_mode_ == kSaveFPRegs);
// Don't overwrite the returned value.
int bytes = __ PopCallerSaved(fp_mode_, kReturnRegister0);
frame_access_state()->IncreaseSPDelta(-(bytes / kPointerSize));
DCHECK_EQ(0, frame_access_state()->sp_delta());
DCHECK(caller_registers_saved_);
caller_registers_saved_ = false;
break;
}
case kArchPrepareTailCall:
AssemblePrepareTailCall();
break;
case kArchCallCFunction: {
int const num_parameters = MiscField::decode(instr->opcode());
if (instr->InputAt(0)->IsImmediate()) {
ExternalReference ref = i.InputExternalReference(0);
__ CallCFunction(ref, num_parameters, 0);
} else {
Register func = i.InputRegister(0);
__ CallCFunction(func, num_parameters, 0);
}
frame_access_state()->SetFrameAccessToDefault();
// Ideally, we should decrement SP delta to match the change of stack
// pointer in CallCFunction. However, for certain architectures (e.g.
// ARM), there may be more strict alignment requirement, causing old SP
// to be saved on the stack. In those cases, we can not calculate the SP
// delta statically.
frame_access_state()->ClearSPDelta();
if (caller_registers_saved_) {
// Need to re-sync SP delta introduced in kArchSaveCallerRegisters.
// Here, we assume the sequence to be:
// kArchSaveCallerRegisters;
// kArchCallCFunction;
// kArchRestoreCallerRegisters;
int bytes =
__ RequiredStackSizeForCallerSaved(fp_mode_, kReturnRegister0);
frame_access_state()->IncreaseSPDelta(bytes / kPointerSize);
}
break;
}
case kArchJmp:
AssembleArchJump(i.InputRpo(0));
break;
case kArchTableSwitch:
AssembleArchTableSwitch(instr);
break;
case kArchBinarySearchSwitch:
AssembleArchBinarySearchSwitch(instr);
break;
case kArchLookupSwitch:
AssembleArchLookupSwitch(instr);
break;
case kArchDebugAbort:
DCHECK(i.InputRegister(0).is(x1));
if (!frame_access_state()->has_frame()) {
// We don't actually want to generate a pile of code for this, so just
// claim there is a stack frame, without generating one.
FrameScope scope(tasm(), StackFrame::NONE);
__ Call(isolate()->builtins()->builtin_handle(Builtins::kAbortJS),
RelocInfo::CODE_TARGET);
} else {
__ Call(isolate()->builtins()->builtin_handle(Builtins::kAbortJS),
RelocInfo::CODE_TARGET);
}
__ Debug("kArchDebugAbort", 0, BREAK);
unwinding_info_writer_.MarkBlockWillExit();
break;
case kArchDebugBreak:
__ Debug("kArchDebugBreak", 0, BREAK);
break;
case kArchComment:
__ RecordComment(reinterpret_cast<const char*>(i.InputInt64(0)));
break;
case kArchThrowTerminator:
unwinding_info_writer_.MarkBlockWillExit();
break;
case kArchNop:
// 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;
unwinding_info_writer_.MarkBlockWillExit();
break;
}
case kArchRet:
AssembleReturn(instr->InputAt(0));
break;
case kArchStackPointer:
__ mov(i.OutputRegister(), sp);
break;
case kArchFramePointer:
__ mov(i.OutputRegister(), fp);
break;
case kArchParentFramePointer:
if (frame_access_state()->has_frame()) {
__ ldr(i.OutputRegister(), MemOperand(fp, 0));
} else {
__ mov(i.OutputRegister(), fp);
}
break;
case kArchTruncateDoubleToI:
__ TruncateDoubleToI(isolate(), zone(), i.OutputRegister(),
i.InputDoubleRegister(0), DetermineStubCallMode());
break;
case kArchStoreWithWriteBarrier: {
RecordWriteMode mode =
static_cast<RecordWriteMode>(MiscField::decode(instr->opcode()));
AddressingMode addressing_mode =
AddressingModeField::decode(instr->opcode());
Register object = i.InputRegister(0);
Operand index(0);
if (addressing_mode == kMode_MRI) {
index = Operand(i.InputInt64(1));
} else {
DCHECK_EQ(addressing_mode, kMode_MRR);
index = Operand(i.InputRegister(1));
}
Register value = i.InputRegister(2);
Register scratch0 = i.TempRegister(0);
Register scratch1 = i.TempRegister(1);
auto ool = new (zone())
OutOfLineRecordWrite(this, object, index, value, scratch0, scratch1,
mode, &unwinding_info_writer_);
__ Str(value, MemOperand(object, index));
__ CheckPageFlagSet(object, scratch0,
MemoryChunk::kPointersFromHereAreInterestingMask,
ool->entry());
__ Bind(ool->exit());
break;
}
case kArchStackSlot: {
FrameOffset offset =
frame_access_state()->GetFrameOffset(i.InputInt32(0));
Register base = offset.from_stack_pointer() ? sp : fp;
__ Add(i.OutputRegister(0), base, Operand(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 kIeee754Float64Cos:
ASSEMBLE_IEEE754_UNOP(cos);
break;
case kIeee754Float64Cosh:
ASSEMBLE_IEEE754_UNOP(cosh);
break;
case kIeee754Float64Cbrt:
ASSEMBLE_IEEE754_UNOP(cbrt);
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: {
__ Call(BUILTIN_CODE(isolate(), MathPowInternal), RelocInfo::CODE_TARGET);
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 kArm64Float32RoundDown:
__ Frintm(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float64RoundDown:
__ Frintm(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float32RoundUp:
__ Frintp(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float64RoundUp:
__ Frintp(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float64RoundTiesAway:
__ Frinta(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float32RoundTruncate:
__ Frintz(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float64RoundTruncate:
__ Frintz(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float32RoundTiesEven:
__ Frintn(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float64RoundTiesEven:
__ Frintn(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Add:
if (FlagsModeField::decode(opcode) != kFlags_none) {
__ Adds(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
} else {
__ Add(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
}
break;
case kArm64Add32:
if (FlagsModeField::decode(opcode) != kFlags_none) {
__ Adds(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
} else {
__ Add(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
}
break;
case kArm64And:
if (FlagsModeField::decode(opcode) != kFlags_none) {
// The ands instruction only sets N and Z, so only the following
// conditions make sense.
DCHECK(FlagsConditionField::decode(opcode) == kEqual ||
FlagsConditionField::decode(opcode) == kNotEqual ||
FlagsConditionField::decode(opcode) == kPositiveOrZero ||
FlagsConditionField::decode(opcode) == kNegative);
__ Ands(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
} else {
__ And(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
}
break;
case kArm64And32:
if (FlagsModeField::decode(opcode) != kFlags_none) {
// The ands instruction only sets N and Z, so only the following
// conditions make sense.
DCHECK(FlagsConditionField::decode(opcode) == kEqual ||
FlagsConditionField::decode(opcode) == kNotEqual ||
FlagsConditionField::decode(opcode) == kPositiveOrZero ||
FlagsConditionField::decode(opcode) == kNegative);
__ Ands(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
} else {
__ And(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
}
break;
case kArm64Bic:
__ Bic(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
break;
case kArm64Bic32:
__ Bic(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
break;
case kArm64Mul:
__ Mul(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
break;
case kArm64Mul32:
__ Mul(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Smull:
__ Smull(i.OutputRegister(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Umull:
__ Umull(i.OutputRegister(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Madd:
__ Madd(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
i.InputRegister(2));
break;
case kArm64Madd32:
__ Madd(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1),
i.InputRegister32(2));
break;
case kArm64Msub:
__ Msub(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
i.InputRegister(2));
break;
case kArm64Msub32:
__ Msub(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1),
i.InputRegister32(2));
break;
case kArm64Mneg:
__ Mneg(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
break;
case kArm64Mneg32:
__ Mneg(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Idiv:
__ Sdiv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
break;
case kArm64Idiv32:
__ Sdiv(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Udiv:
__ Udiv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
break;
case kArm64Udiv32:
__ Udiv(i.OutputRegister32(), i.InputRegister32(0), i.InputRegister32(1));
break;
case kArm64Imod: {
UseScratchRegisterScope scope(tasm());
Register temp = scope.AcquireX();
__ Sdiv(temp, i.InputRegister(0), i.InputRegister(1));
__ Msub(i.OutputRegister(), temp, i.InputRegister(1), i.InputRegister(0));
break;
}
case kArm64Imod32: {
UseScratchRegisterScope scope(tasm());
Register temp = scope.AcquireW();
__ Sdiv(temp, i.InputRegister32(0), i.InputRegister32(1));
__ Msub(i.OutputRegister32(), temp, i.InputRegister32(1),
i.InputRegister32(0));
break;
}
case kArm64Umod: {
UseScratchRegisterScope scope(tasm());
Register temp = scope.AcquireX();
__ Udiv(temp, i.InputRegister(0), i.InputRegister(1));
__ Msub(i.OutputRegister(), temp, i.InputRegister(1), i.InputRegister(0));
break;
}
case kArm64Umod32: {
UseScratchRegisterScope scope(tasm());
Register temp = scope.AcquireW();
__ Udiv(temp, i.InputRegister32(0), i.InputRegister32(1));
__ Msub(i.OutputRegister32(), temp, i.InputRegister32(1),
i.InputRegister32(0));
break;
}
case kArm64Not:
__ Mvn(i.OutputRegister(), i.InputOperand(0));
break;
case kArm64Not32:
__ Mvn(i.OutputRegister32(), i.InputOperand32(0));
break;
case kArm64Or:
__ Orr(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
break;
case kArm64Or32:
__ Orr(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
break;
case kArm64Orn:
__ Orn(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
break;
case kArm64Orn32:
__ Orn(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
break;
case kArm64Eor:
__ Eor(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
break;
case kArm64Eor32:
__ Eor(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
break;
case kArm64Eon:
__ Eon(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
break;
case kArm64Eon32:
__ Eon(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
break;
case kArm64Sub:
if (FlagsModeField::decode(opcode) != kFlags_none) {
__ Subs(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
} else {
__ Sub(i.OutputRegister(), i.InputOrZeroRegister64(0),
i.InputOperand2_64(1));
}
break;
case kArm64Sub32:
if (FlagsModeField::decode(opcode) != kFlags_none) {
__ Subs(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
} else {
__ Sub(i.OutputRegister32(), i.InputOrZeroRegister32(0),
i.InputOperand2_32(1));
}
break;
case kArm64Lsl:
ASSEMBLE_SHIFT(Lsl, 64);
break;
case kArm64Lsl32:
ASSEMBLE_SHIFT(Lsl, 32);
break;
case kArm64Lsr:
ASSEMBLE_SHIFT(Lsr, 64);
break;
case kArm64Lsr32:
ASSEMBLE_SHIFT(Lsr, 32);
break;
case kArm64Asr:
ASSEMBLE_SHIFT(Asr, 64);
break;
case kArm64Asr32:
ASSEMBLE_SHIFT(Asr, 32);
break;
case kArm64Ror:
ASSEMBLE_SHIFT(Ror, 64);
break;
case kArm64Ror32:
ASSEMBLE_SHIFT(Ror, 32);
break;
case kArm64Mov32:
__ Mov(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Sxtb32:
__ Sxtb(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Sxth32:
__ Sxth(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Sxtb:
__ Sxtb(i.OutputRegister(), i.InputRegister32(0));
break;
case kArm64Sxth:
__ Sxth(i.OutputRegister(), i.InputRegister32(0));
break;
case kArm64Sxtw:
__ Sxtw(i.OutputRegister(), i.InputRegister32(0));
break;
case kArm64Sbfx32:
__ Sbfx(i.OutputRegister32(), i.InputRegister32(0), i.InputInt5(1),
i.InputInt5(2));
break;
case kArm64Ubfx:
__ Ubfx(i.OutputRegister(), i.InputRegister(0), i.InputInt6(1),
i.InputInt32(2));
break;
case kArm64Ubfx32:
__ Ubfx(i.OutputRegister32(), i.InputRegister32(0), i.InputInt5(1),
i.InputInt32(2));
break;
case kArm64Ubfiz32:
__ Ubfiz(i.OutputRegister32(), i.InputRegister32(0), i.InputInt5(1),
i.InputInt5(2));
break;
case kArm64Bfi:
__ Bfi(i.OutputRegister(), i.InputRegister(1), i.InputInt6(2),
i.InputInt6(3));
break;
case kArm64TestAndBranch32:
case kArm64TestAndBranch:
// Pseudo instructions turned into tbz/tbnz in AssembleArchBranch.
break;
case kArm64CompareAndBranch32:
case kArm64CompareAndBranch:
// Pseudo instruction handled in AssembleArchBranch.
break;
case kArm64Claim: {
int count = i.InputInt32(0);
DCHECK_EQ(count % 2, 0);
__ AssertSpAligned();
if (count > 0) {
__ Claim(count);
frame_access_state()->IncreaseSPDelta(count);
}
break;
}
case kArm64Poke: {
Operand operand(i.InputInt32(1) * kPointerSize);
if (instr->InputAt(0)->IsSimd128Register()) {
__ Poke(i.InputSimd128Register(0), operand);
} else if (instr->InputAt(0)->IsFPRegister()) {
__ Poke(i.InputFloat64Register(0), operand);
} else {
__ Poke(i.InputOrZeroRegister64(0), operand);
}
break;
}
case kArm64PokePair: {
int slot = i.InputInt32(2) - 1;
if (instr->InputAt(0)->IsFPRegister()) {
__ PokePair(i.InputFloat64Register(1), i.InputFloat64Register(0),
slot * kPointerSize);
} else {
__ PokePair(i.InputRegister(1), i.InputRegister(0),
slot * kPointerSize);
}
break;
}
case kArm64Peek: {
int reverse_slot = i.InputInt32(0);
int offset =
FrameSlotToFPOffset(frame()->GetTotalFrameSlotCount() - reverse_slot);
if (instr->OutputAt(0)->IsFPRegister()) {
LocationOperand* op = LocationOperand::cast(instr->OutputAt(0));
if (op->representation() == MachineRepresentation::kFloat64) {
__ Ldr(i.OutputDoubleRegister(), MemOperand(fp, offset));
} else {
DCHECK_EQ(MachineRepresentation::kFloat32, op->representation());
__ Ldr(i.OutputFloatRegister(), MemOperand(fp, offset));
}
} else {
__ Ldr(i.OutputRegister(), MemOperand(fp, offset));
}
break;
}
case kArm64Clz:
__ Clz(i.OutputRegister64(), i.InputRegister64(0));
break;
case kArm64Clz32:
__ Clz(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Rbit:
__ Rbit(i.OutputRegister64(), i.InputRegister64(0));
break;
case kArm64Rbit32:
__ Rbit(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Rev:
__ Rev(i.OutputRegister64(), i.InputRegister64(0));
break;
case kArm64Rev32:
__ Rev(i.OutputRegister32(), i.InputRegister32(0));
break;
case kArm64Cmp:
__ Cmp(i.InputOrZeroRegister64(0), i.InputOperand2_64(1));
break;
case kArm64Cmp32:
__ Cmp(i.InputOrZeroRegister32(0), i.InputOperand2_32(1));
break;
case kArm64Cmn:
__ Cmn(i.InputOrZeroRegister64(0), i.InputOperand2_64(1));
break;
case kArm64Cmn32:
__ Cmn(i.InputOrZeroRegister32(0), i.InputOperand2_32(1));
break;
case kArm64Tst:
__ Tst(i.InputOrZeroRegister64(0), i.InputOperand2_64(1));
break;
case kArm64Tst32:
__ Tst(i.InputOrZeroRegister32(0), i.InputOperand2_32(1));
break;
case kArm64Float32Cmp:
if (instr->InputAt(1)->IsFPRegister()) {
__ Fcmp(i.InputFloat32Register(0), i.InputFloat32Register(1));
} else {
DCHECK(instr->InputAt(1)->IsImmediate());
// 0.0 is the only immediate supported by fcmp instructions.
DCHECK_EQ(0.0f, i.InputFloat32(1));
__ Fcmp(i.InputFloat32Register(0), i.InputFloat32(1));
}
break;
case kArm64Float32Add:
__ Fadd(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
case kArm64Float32Sub:
__ Fsub(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
case kArm64Float32Mul:
__ Fmul(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
case kArm64Float32Div:
__ Fdiv(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
case kArm64Float32Abs:
__ Fabs(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float32Neg:
__ Fneg(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float32Sqrt:
__ Fsqrt(i.OutputFloat32Register(), i.InputFloat32Register(0));
break;
case kArm64Float64Cmp:
if (instr->InputAt(1)->IsFPRegister()) {
__ Fcmp(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
} else {
DCHECK(instr->InputAt(1)->IsImmediate());
// 0.0 is the only immediate supported by fcmp instructions.
DCHECK_EQ(0.0, i.InputDouble(1));
__ Fcmp(i.InputDoubleRegister(0), i.InputDouble(1));
}
break;
case kArm64Float64Add:
__ Fadd(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
case kArm64Float64Sub:
__ Fsub(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
case kArm64Float64Mul:
__ Fmul(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
case kArm64Float64Div:
__ Fdiv(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
case kArm64Float64Mod: {
// TODO(dcarney): implement directly. See note in lithium-codegen-arm64.cc
FrameScope scope(tasm(), StackFrame::MANUAL);
DCHECK(d0.is(i.InputDoubleRegister(0)));
DCHECK(d1.is(i.InputDoubleRegister(1)));
DCHECK(d0.is(i.OutputDoubleRegister()));
// TODO(dcarney): make sure this saves all relevant registers.
__ CallCFunction(ExternalReference::mod_two_doubles_operation(), 0, 2);
break;
}
case kArm64Float32Max: {
__ Fmax(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
}
case kArm64Float64Max: {
__ Fmax(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
}
case kArm64Float32Min: {
__ Fmin(i.OutputFloat32Register(), i.InputFloat32Register(0),
i.InputFloat32Register(1));
break;
}
case kArm64Float64Min: {
__ Fmin(i.OutputDoubleRegister(), i.InputDoubleRegister(0),
i.InputDoubleRegister(1));
break;
}
case kArm64Float64Abs:
__ Fabs(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float64Neg:
__ Fneg(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float64Sqrt:
__ Fsqrt(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64Float32ToFloat64:
__ Fcvt(i.OutputDoubleRegister(), i.InputDoubleRegister(0).S());
break;
case kArm64Float64ToFloat32:
__ Fcvt(i.OutputDoubleRegister().S(), i.InputDoubleRegister(0));
break;
case kArm64Float32ToInt32:
__ Fcvtzs(i.OutputRegister32(), i.InputFloat32Register(0));
// Avoid INT32_MAX as an overflow indicator and use INT32_MIN instead,
// because INT32_MIN allows easier out-of-bounds detection.
__ Cmn(i.OutputRegister32(), 1);
__ Csinc(i.OutputRegister32(), i.OutputRegister32(), i.OutputRegister32(),
vc);
break;
case kArm64Float64ToInt32:
__ Fcvtzs(i.OutputRegister32(), i.InputDoubleRegister(0));
break;
case kArm64Float32ToUint32:
__ Fcvtzu(i.OutputRegister32(), i.InputFloat32Register(0));
// Avoid UINT32_MAX as an overflow indicator and use 0 instead,
// because 0 allows easier out-of-bounds detection.
__ Cmn(i.OutputRegister32(), 1);
__ Adc(i.OutputRegister32(), i.OutputRegister32(), Operand(0));
break;
case kArm64Float64ToUint32:
__ Fcvtzu(i.OutputRegister32(), i.InputDoubleRegister(0));
break;
case kArm64Float32ToInt64:
__ Fcvtzs(i.OutputRegister64(), i.InputFloat32Register(0));
if (i.OutputCount() > 1) {
// Check for inputs below INT64_MIN and NaN.
__ Fcmp(i.InputFloat32Register(0), static_cast<float>(INT64_MIN));
// Check overflow.
// -1 value is used to indicate a possible overflow which will occur
// when subtracting (-1) from the provided INT64_MAX operand.
// OutputRegister(1) is set to 0 if the input was out of range or NaN.
__ Ccmp(i.OutputRegister(0), -1, VFlag, ge);
__ Cset(i.OutputRegister(1), vc);
}
break;
case kArm64Float64ToInt64:
__ Fcvtzs(i.OutputRegister(0), i.InputDoubleRegister(0));
if (i.OutputCount() > 1) {
// See kArm64Float32ToInt64 for a detailed description.
__ Fcmp(i.InputDoubleRegister(0), static_cast<double>(INT64_MIN));
__ Ccmp(i.OutputRegister(0), -1, VFlag, ge);
__ Cset(i.OutputRegister(1), vc);
}
break;
case kArm64Float32ToUint64:
__ Fcvtzu(i.OutputRegister64(), i.InputFloat32Register(0));
if (i.OutputCount() > 1) {
// See kArm64Float32ToInt64 for a detailed description.
__ Fcmp(i.InputFloat32Register(0), -1.0);
__ Ccmp(i.OutputRegister(0), -1, ZFlag, gt);
__ Cset(i.OutputRegister(1), ne);
}
break;
case kArm64Float64ToUint64:
__ Fcvtzu(i.OutputRegister64(), i.InputDoubleRegister(0));
if (i.OutputCount() > 1) {
// See kArm64Float32ToInt64 for a detailed description.
__ Fcmp(i.InputDoubleRegister(0), -1.0);
__ Ccmp(i.OutputRegister(0), -1, ZFlag, gt);
__ Cset(i.OutputRegister(1), ne);
}
break;
case kArm64Int32ToFloat32:
__ Scvtf(i.OutputFloat32Register(), i.InputRegister32(0));
break;
case kArm64Int32ToFloat64:
__ Scvtf(i.OutputDoubleRegister(), i.InputRegister32(0));
break;
case kArm64Int64ToFloat32:
__ Scvtf(i.OutputDoubleRegister().S(), i.InputRegister64(0));
break;
case kArm64Int64ToFloat64:
__ Scvtf(i.OutputDoubleRegister(), i.InputRegister64(0));
break;
case kArm64Uint32ToFloat32:
__ Ucvtf(i.OutputFloat32Register(), i.InputRegister32(0));
break;
case kArm64Uint32ToFloat64:
__ Ucvtf(i.OutputDoubleRegister(), i.InputRegister32(0));
break;
case kArm64Uint64ToFloat32:
__ Ucvtf(i.OutputDoubleRegister().S(), i.InputRegister64(0));
break;
case kArm64Uint64ToFloat64:
__ Ucvtf(i.OutputDoubleRegister(), i.InputRegister64(0));
break;
case kArm64Float64ExtractLowWord32:
__ Fmov(i.OutputRegister32(), i.InputFloat32Register(0));
break;
case kArm64Float64ExtractHighWord32:
__ Umov(i.OutputRegister32(), i.InputFloat64Register(0).V2S(), 1);
break;
case kArm64Float64InsertLowWord32:
DCHECK(i.OutputFloat64Register().Is(i.InputFloat64Register(0)));
__ Ins(i.OutputFloat64Register().V2S(), 0, i.InputRegister32(1));
break;
case kArm64Float64InsertHighWord32:
DCHECK(i.OutputFloat64Register().Is(i.InputFloat64Register(0)));
__ Ins(i.OutputFloat64Register().V2S(), 1, i.InputRegister32(1));
break;
case kArm64Float64MoveU64:
__ Fmov(i.OutputFloat64Register(), i.InputRegister(0));
break;
case kArm64Float64SilenceNaN:
__ CanonicalizeNaN(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
break;
case kArm64U64MoveFloat64:
__ Fmov(i.OutputRegister(), i.InputDoubleRegister(0));
break;
case kArm64Ldrb:
__ Ldrb(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64Ldrsb:
__ Ldrsb(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64Strb:
__ Strb(i.InputOrZeroRegister64(0), i.MemoryOperand(1));
break;
case kArm64Ldrh:
__ Ldrh(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64Ldrsh:
__ Ldrsh(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64Strh:
__ Strh(i.InputOrZeroRegister64(0), i.MemoryOperand(1));
break;
case kArm64Ldrsw:
__ Ldrsw(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64LdrW:
__ Ldr(i.OutputRegister32(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64StrW:
__ Str(i.InputOrZeroRegister32(0), i.MemoryOperand(1));
break;
case kArm64Ldr:
__ Ldr(i.OutputRegister(), i.MemoryOperand());
EmitWordLoadPoisoningIfNeeded(this, opcode, instr, i);
break;
case kArm64Str:
__ Str(i.InputOrZeroRegister64(0), i.MemoryOperand(1));
break;
case kArm64LdrS:
__ Ldr(i.OutputDoubleRegister().S(), i.MemoryOperand());
break;
case kArm64StrS:
__ Str(i.InputFloat32OrZeroRegister(0), i.MemoryOperand(1));
break;
case kArm64LdrD:
__ Ldr(i.OutputDoubleRegister(), i.MemoryOperand());
break;
case kArm64StrD:
__ Str(i.InputFloat64OrZeroRegister(0), i.MemoryOperand(1));
break;
case kArm64LdrQ:
__ Ldr(i.OutputSimd128Register(), i.MemoryOperand());
break;
case kArm64StrQ:
__ Str(i.InputSimd128Register(0), i.MemoryOperand(1));
break;
case kArm64DsbIsb:
__ Dsb(FullSystem, BarrierAll);
__ Isb();
break;
case kArchWordPoisonOnSpeculation:
__ And(i.OutputRegister(0), i.InputRegister(0),
Operand(kSpeculationPoisonRegister));
break;
case kWord32AtomicLoadInt8:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldarb, Register32);
__ Sxtb(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicLoadUint8:
case kArm64Word64AtomicLoadUint8:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldarb, Register32);
break;
case kWord32AtomicLoadInt16:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldarh, Register32);
__ Sxth(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicLoadUint16:
case kArm64Word64AtomicLoadUint16:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldarh, Register32);
break;
case kWord32AtomicLoadWord32:
case kArm64Word64AtomicLoadUint32:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldar, Register32);
break;
case kArm64Word64AtomicLoadUint64:
ASSEMBLE_ATOMIC_LOAD_INTEGER(Ldar, Register);
break;
case kWord32AtomicStoreWord8:
case kArm64Word64AtomicStoreWord8:
ASSEMBLE_ATOMIC_STORE_INTEGER(Stlrb, Register32);
break;
case kWord32AtomicStoreWord16:
case kArm64Word64AtomicStoreWord16:
ASSEMBLE_ATOMIC_STORE_INTEGER(Stlrh, Register32);
break;
case kWord32AtomicStoreWord32:
case kArm64Word64AtomicStoreWord32:
ASSEMBLE_ATOMIC_STORE_INTEGER(Stlr, Register32);
break;
case kArm64Word64AtomicStoreWord64:
ASSEMBLE_ATOMIC_STORE_INTEGER(Stlr, Register);
break;
case kWord32AtomicExchangeInt8:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxrb, stlxrb, Register32);
__ Sxtb(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicExchangeUint8:
case kArm64Word64AtomicExchangeUint8:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxrb, stlxrb, Register32);
break;
case kWord32AtomicExchangeInt16:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxrh, stlxrh, Register32);
__ Sxth(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicExchangeUint16:
case kArm64Word64AtomicExchangeUint16:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxrh, stlxrh, Register32);
break;
case kWord32AtomicExchangeWord32:
case kArm64Word64AtomicExchangeUint32:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxr, stlxr, Register32);
break;
case kArm64Word64AtomicExchangeUint64:
ASSEMBLE_ATOMIC_EXCHANGE_INTEGER(ldaxr, stlxr, Register);
break;
case kWord32AtomicCompareExchangeInt8:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxrb, stlxrb, UXTB,
Register32);
__ Sxtb(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicCompareExchangeUint8:
case kArm64Word64AtomicCompareExchangeUint8:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxrb, stlxrb, UXTB,
Register32);
break;
case kWord32AtomicCompareExchangeInt16:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxrh, stlxrh, UXTH,
Register32);
__ Sxth(i.OutputRegister(0), i.OutputRegister(0));
break;
case kWord32AtomicCompareExchangeUint16:
case kArm64Word64AtomicCompareExchangeUint16:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxrh, stlxrh, UXTH,
Register32);
break;
case kWord32AtomicCompareExchangeWord32:
case kArm64Word64AtomicCompareExchangeUint32:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxr, stlxr, UXTW, Register32);
break;
case kArm64Word64AtomicCompareExchangeUint64:
ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER(ldaxr, stlxr, UXTX, Register);
break;
#define ATOMIC_BINOP_CASE(op, inst) \
case kWord32Atomic##op##Int8: \
ASSEMBLE_ATOMIC_BINOP(ldaxrb, stlxrb, inst, Register32); \
__ Sxtb(i.OutputRegister(0), i.OutputRegister(0)); \
break; \
case kWord32Atomic##op##Uint8: \
case kArm64Word64Atomic##op##Uint8: \
ASSEMBLE_ATOMIC_BINOP(ldaxrb, stlxrb, inst, Register32); \
break; \
case kWord32Atomic##op##Int16: \
ASSEMBLE_ATOMIC_BINOP(ldaxrh, stlxrh, inst, Register32); \
__ Sxth(i.OutputRegister(0), i.OutputRegister(0)); \
break; \
case kWord32Atomic##op##Uint16: \
case kArm64Word64Atomic##op##Uint16: \
ASSEMBLE_ATOMIC_BINOP(ldaxrh, stlxrh, inst, Register32); \
break; \
case kWord32Atomic##op##Word32: \
case kArm64Word64Atomic##op##Uint32: \
ASSEMBLE_ATOMIC_BINOP(ldaxr, stlxr, inst, Register32); \
break; \
case kArm64Word64Atomic##op##Uint64: \
ASSEMBLE_ATOMIC_BINOP(ldaxr, stlxr, inst, Register); \
break;
ATOMIC_BINOP_CASE(Add, Add)
ATOMIC_BINOP_CASE(Sub, Sub)
ATOMIC_BINOP_CASE(And, And)
ATOMIC_BINOP_CASE(Or, Orr)
ATOMIC_BINOP_CASE(Xor, Eor)
#undef ATOMIC_BINOP_CASE
#undef ASSEMBLE_SHIFT
#undef ASSEMBLE_ATOMIC_LOAD_INTEGER
#undef ASSEMBLE_ATOMIC_STORE_INTEGER
#undef ASSEMBLE_ATOMIC_EXCHANGE_INTEGER
#undef ASSEMBLE_ATOMIC_COMPARE_EXCHANGE_INTEGER
#undef ASSEMBLE_ATOMIC_BINOP
#undef ASSEMBLE_IEEE754_BINOP
#undef ASSEMBLE_IEEE754_UNOP
#define SIMD_UNOP_CASE(Op, Instr, FORMAT) \
case Op: \
__ Instr(i.OutputSimd128Register().V##FORMAT(), \
i.InputSimd128Register(0).V##FORMAT()); \
break;
#define SIMD_WIDENING_UNOP_CASE(Op, Instr, WIDE, NARROW) \
case Op: \
__ Instr(i.OutputSimd128Register().V##WIDE(), \
i.InputSimd128Register(0).V##NARROW()); \
break;
#define SIMD_BINOP_CASE(Op, Instr, FORMAT) \
case Op: \
__ Instr(i.OutputSimd128Register().V##FORMAT(), \
i.InputSimd128Register(0).V##FORMAT(), \
i.InputSimd128Register(1).V##FORMAT()); \
break;
case kArm64F32x4Splat: {
__ Dup(i.OutputSimd128Register().V4S(), i.InputSimd128Register(0).S(), 0);
break;
}
case kArm64F32x4ExtractLane: {
__ Mov(i.OutputSimd128Register().S(), i.InputSimd128Register(0).V4S(),
i.InputInt8(1));
break;
}
case kArm64F32x4ReplaceLane: {
VRegister dst = i.OutputSimd128Register().V4S(),
src1 = i.InputSimd128Register(0).V4S();
if (!dst.is(src1)) {
__ Mov(dst, src1);
}
__ Mov(dst, i.InputInt8(1), i.InputSimd128Register(2).V4S(), 0);
break;
}
SIMD_UNOP_CASE(kArm64F32x4SConvertI32x4, Scvtf, 4S);
SIMD_UNOP_CASE(kArm64F32x4UConvertI32x4, Ucvtf, 4S);
SIMD_UNOP_CASE(kArm64F32x4Abs, Fabs, 4S);
SIMD_UNOP_CASE(kArm64F32x4Neg, Fneg, 4S);
SIMD_UNOP_CASE(kArm64F32x4RecipApprox, Frecpe, 4S);
SIMD_UNOP_CASE(kArm64F32x4RecipSqrtApprox, Frsqrte, 4S);
SIMD_BINOP_CASE(kArm64F32x4Add, Fadd, 4S);
SIMD_BINOP_CASE(kArm64F32x4AddHoriz, Faddp, 4S);
SIMD_BINOP_CASE(kArm64F32x4Sub, Fsub, 4S);
SIMD_BINOP_CASE(kArm64F32x4Mul, Fmul, 4S);
SIMD_BINOP_CASE(kArm64F32x4Min, Fmin, 4S);
SIMD_BINOP_CASE(kArm64F32x4Max, Fmax, 4S);
SIMD_BINOP_CASE(kArm64F32x4Eq, Fcmeq, 4S);
case kArm64F32x4Ne: {
VRegister dst = i.OutputSimd128Register().V4S();
__ Fcmeq(dst, i.InputSimd128Register(0).V4S(),
i.InputSimd128Register(1).V4S());
__ Mvn(dst, dst);
break;
}
case kArm64F32x4Lt: {
__ Fcmgt(i.OutputSimd128Register().V4S(), i.InputSimd128Register(1).V4S(),
i.InputSimd128Register(0).V4S());
break;
}
case kArm64F32x4Le: {
__ Fcmge(i.OutputSimd128Register().V4S(), i.InputSimd128Register(1).V4S(),
i.InputSimd128Register(0).V4S());
break;
}
case kArm64I32x4Splat: {
__ Dup(i.OutputSimd128Register().V4S(), i.InputRegister32(0));
break;
}
case kArm64I32x4ExtractLane: {
__ Mov(i.OutputRegister32(), i.InputSimd128Register(0).V4S(),
i.InputInt8(1));
break;
}
case kArm64I32x4ReplaceLane: {
VRegister dst = i.OutputSimd128Register().V4S(),
src1 = i.InputSimd128Register(0).V4S();
if (!dst.is(src1)) {
__ Mov(dst, src1);
}
__ Mov(dst, i.InputInt8(1), i.InputRegister32(2));
break;
}
SIMD_UNOP_CASE(kArm64I32x4SConvertF32x4, Fcvtzs, 4S);
SIMD_WIDENING_UNOP_CASE(kArm64I32x4SConvertI16x8Low, Sxtl, 4S, 4H);
SIMD_WIDENING_UNOP_CASE(kArm64I32x4SConvertI16x8High, Sxtl2, 4S, 8H);
SIMD_UNOP_CASE(kArm64I32x4Neg, Neg, 4S);
case kArm64I32x4Shl: {
__ Shl(i.OutputSimd128Register().V4S(), i.InputSimd128Register(0).V4S(),
i.InputInt5(1));
break;
}
case kArm64I32x4ShrS: {
__ Sshr(i.OutputSimd128Register().V4S(), i.InputSimd128Register(0).V4S(),
i.InputInt5(1));
break;
}
SIMD_BINOP_CASE(kArm64I32x4Add, Add, 4S);
SIMD_BINOP_CASE(kArm64I32x4AddHoriz, Addp, 4S);
SIMD_BINOP_CASE(kArm64I32x4Sub, Sub, 4S);
SIMD_BINOP_CASE(kArm64I32x4Mul, Mul, 4S);
SIMD_BINOP_CASE(kArm64I32x4MinS, Smin, 4S);
SIMD_BINOP_CASE(kArm64I32x4MaxS, Smax, 4S);
SIMD_BINOP_CASE(kArm64I32x4Eq, Cmeq, 4S);
case kArm64I32x4Ne: {
VRegister dst = i.OutputSimd128Register().V4S();
__ Cmeq(dst, i.InputSimd128Register(0).V4S(),
i.InputSimd128Register(1).V4S());
__ Mvn(dst, dst);
break;
}
SIMD_BINOP_CASE(kArm64I32x4GtS, Cmgt, 4S);
SIMD_BINOP_CASE(kArm64I32x4GeS, Cmge, 4S);
SIMD_UNOP_CASE(kArm64I32x4UConvertF32x4, Fcvtzu, 4S);
SIMD_WIDENING_UNOP_CASE(kArm64I32x4UConvertI16x8Low, Uxtl, 4S, 4H);
SIMD_WIDENING_UNOP_CASE(kArm64I32x4UConvertI16x8High, Uxtl2, 4S, 8H);
case kArm64I32x4ShrU: {
__ Ushr(i.OutputSimd128Register().V4S(), i.InputSimd128Register(0).V4S(),
i.InputInt5(1));
break;
}
SIMD_BINOP_CASE(kArm64I32x4MinU, Umin, 4S);
SIMD_BINOP_CASE(kArm64I32x4MaxU, Umax, 4S);
SIMD_BINOP_CASE(kArm64I32x4GtU, Cmhi, 4S);
SIMD_BINOP_CASE(kArm64I32x4GeU, Cmhs, 4S);
case kArm64I16x8Splat: {
__ Dup(i.OutputSimd128Register().V8H(), i.InputRegister32(0));
break;
}
case kArm64I16x8ExtractLane: {
__ Smov(i.OutputRegister32(), i.InputSimd128Register(0).V8H(),
i.InputInt8(1));
break;
}
case kArm64I16x8ReplaceLane: {
VRegister dst = i.OutputSimd128Register().V8H(),
src1 = i.InputSimd128Register(0).V8H();
if (!dst.is(src1)) {
__ Mov(dst, src1);
}
__ Mov(dst, i.InputInt8(1), i.InputRegister32(2));
break;
}
SIMD_WIDENING_UNOP_CASE(kArm64I16x8SConvertI8x16Low, Sxtl, 8H, 8B);
SIMD_WIDENING_UNOP_CASE(kArm64I16x8SConvertI8x16High, Sxtl2, 8H, 16B);
SIMD_UNOP_CASE(kArm64I16x8Neg, Neg, 8H);
case kArm64I16x8Shl: {
__ Shl(i.OutputSimd128Register().V8H(), i.InputSimd128Register(0).V8H(),
i.InputInt5(1));
break;
}
case kArm64I16x8ShrS: {
__ Sshr(i.OutputSimd128Register().V8H(), i.InputSimd128Register(0).V8H(),
i.InputInt5(1));
break;
}
case kArm64I16x8SConvertI32x4: {
VRegister dst = i.OutputSimd128Register(),
src0 = i.InputSimd128Register(0),
src1 = i.InputSimd128Register(1);
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat4S);
if (dst.is(src1)) {
__ Mov(temp, src1.V4S());
src1 = temp;
}
__ Sqxtn(dst.V4H(), src0.V4S());
__ Sqxtn2(dst.V8H(), src1.V4S());
break;
}
SIMD_BINOP_CASE(kArm64I16x8Add, Add, 8H);
SIMD_BINOP_CASE(kArm64I16x8AddSaturateS, Sqadd, 8H);
SIMD_BINOP_CASE(kArm64I16x8AddHoriz, Addp, 8H);
SIMD_BINOP_CASE(kArm64I16x8Sub, Sub, 8H);
SIMD_BINOP_CASE(kArm64I16x8SubSaturateS, Sqsub, 8H);
SIMD_BINOP_CASE(kArm64I16x8Mul, Mul, 8H);
SIMD_BINOP_CASE(kArm64I16x8MinS, Smin, 8H);
SIMD_BINOP_CASE(kArm64I16x8MaxS, Smax, 8H);
SIMD_BINOP_CASE(kArm64I16x8Eq, Cmeq, 8H);
case kArm64I16x8Ne: {
VRegister dst = i.OutputSimd128Register().V8H();
__ Cmeq(dst, i.InputSimd128Register(0).V8H(),
i.InputSimd128Register(1).V8H());
__ Mvn(dst, dst);
break;
}
SIMD_BINOP_CASE(kArm64I16x8GtS, Cmgt, 8H);
SIMD_BINOP_CASE(kArm64I16x8GeS, Cmge, 8H);
case kArm64I16x8UConvertI8x16Low: {
__ Uxtl(i.OutputSimd128Register().V8H(), i.InputSimd128Register(0).V8B());
break;
}
case kArm64I16x8UConvertI8x16High: {
__ Uxtl2(i.OutputSimd128Register().V8H(),
i.InputSimd128Register(0).V16B());
break;
}
case kArm64I16x8ShrU: {
__ Ushr(i.OutputSimd128Register().V8H(), i.InputSimd128Register(0).V8H(),
i.InputInt5(1));
break;
}
case kArm64I16x8UConvertI32x4: {
VRegister dst = i.OutputSimd128Register(),
src0 = i.InputSimd128Register(0),
src1 = i.InputSimd128Register(1);
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat4S);
if (dst.is(src1)) {
__ Mov(temp, src1.V4S());
src1 = temp;
}
__ Uqxtn(dst.V4H(), src0.V4S());
__ Uqxtn2(dst.V8H(), src1.V4S());
break;
}
SIMD_BINOP_CASE(kArm64I16x8AddSaturateU, Uqadd, 8H);
SIMD_BINOP_CASE(kArm64I16x8SubSaturateU, Uqsub, 8H);
SIMD_BINOP_CASE(kArm64I16x8MinU, Umin, 8H);
SIMD_BINOP_CASE(kArm64I16x8MaxU, Umax, 8H);
SIMD_BINOP_CASE(kArm64I16x8GtU, Cmhi, 8H);
SIMD_BINOP_CASE(kArm64I16x8GeU, Cmhs, 8H);
case kArm64I8x16Splat: {
__ Dup(i.OutputSimd128Register().V16B(), i.InputRegister32(0));
break;
}
case kArm64I8x16ExtractLane: {
__ Smov(i.OutputRegister32(), i.InputSimd128Register(0).V16B(),
i.InputInt8(1));
break;
}
case kArm64I8x16ReplaceLane: {
VRegister dst = i.OutputSimd128Register().V16B(),
src1 = i.InputSimd128Register(0).V16B();
if (!dst.is(src1)) {
__ Mov(dst, src1);
}
__ Mov(dst, i.InputInt8(1), i.InputRegister32(2));
break;
}
SIMD_UNOP_CASE(kArm64I8x16Neg, Neg, 16B);
case kArm64I8x16Shl: {
__ Shl(i.OutputSimd128Register().V16B(), i.InputSimd128Register(0).V16B(),
i.InputInt5(1));
break;
}
case kArm64I8x16ShrS: {
__ Sshr(i.OutputSimd128Register().V16B(),
i.InputSimd128Register(0).V16B(), i.InputInt5(1));
break;
}
case kArm64I8x16SConvertI16x8: {
VRegister dst = i.OutputSimd128Register(),
src0 = i.InputSimd128Register(0),
src1 = i.InputSimd128Register(1);
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat8H);
if (dst.is(src1)) {
__ Mov(temp, src1.V8H());
src1 = temp;
}
__ Sqxtn(dst.V8B(), src0.V8H());
__ Sqxtn2(dst.V16B(), src1.V8H());
break;
}
SIMD_BINOP_CASE(kArm64I8x16Add, Add, 16B);
SIMD_BINOP_CASE(kArm64I8x16AddSaturateS, Sqadd, 16B);
SIMD_BINOP_CASE(kArm64I8x16Sub, Sub, 16B);
SIMD_BINOP_CASE(kArm64I8x16SubSaturateS, Sqsub, 16B);
SIMD_BINOP_CASE(kArm64I8x16Mul, Mul, 16B);
SIMD_BINOP_CASE(kArm64I8x16MinS, Smin, 16B);
SIMD_BINOP_CASE(kArm64I8x16MaxS, Smax, 16B);
SIMD_BINOP_CASE(kArm64I8x16Eq, Cmeq, 16B);
case kArm64I8x16Ne: {
VRegister dst = i.OutputSimd128Register().V16B();
__ Cmeq(dst, i.InputSimd128Register(0).V16B(),
i.InputSimd128Register(1).V16B());
__ Mvn(dst, dst);
break;
}
SIMD_BINOP_CASE(kArm64I8x16GtS, Cmgt, 16B);
SIMD_BINOP_CASE(kArm64I8x16GeS, Cmge, 16B);
case kArm64I8x16ShrU: {
__ Ushr(i.OutputSimd128Register().V16B(),
i.InputSimd128Register(0).V16B(), i.InputInt5(1));
break;
}
case kArm64I8x16UConvertI16x8: {
VRegister dst = i.OutputSimd128Register(),
src0 = i.InputSimd128Register(0),
src1 = i.InputSimd128Register(1);
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat8H);
if (dst.is(src1)) {
__ Mov(temp, src1.V8H());
src1 = temp;
}
__ Uqxtn(dst.V8B(), src0.V8H());
__ Uqxtn2(dst.V16B(), src1.V8H());
break;
}
SIMD_BINOP_CASE(kArm64I8x16AddSaturateU, Uqadd, 16B);
SIMD_BINOP_CASE(kArm64I8x16SubSaturateU, Uqsub, 16B);
SIMD_BINOP_CASE(kArm64I8x16MinU, Umin, 16B);
SIMD_BINOP_CASE(kArm64I8x16MaxU, Umax, 16B);
SIMD_BINOP_CASE(kArm64I8x16GtU, Cmhi, 16B);
SIMD_BINOP_CASE(kArm64I8x16GeU, Cmhs, 16B);
case kArm64S128Zero: {
__ Movi(i.OutputSimd128Register().V16B(), 0);
break;
}
SIMD_BINOP_CASE(kArm64S128And, And, 16B);
SIMD_BINOP_CASE(kArm64S128Or, Orr, 16B);
SIMD_BINOP_CASE(kArm64S128Xor, Eor, 16B);
SIMD_UNOP_CASE(kArm64S128Not, Mvn, 16B);
case kArm64S128Dup: {
VRegister dst = i.OutputSimd128Register(),
src = i.InputSimd128Register(0);
int lanes = i.InputInt32(1);
int index = i.InputInt32(2);
switch (lanes) {
case 4:
__ Dup(dst.V4S(), src.V4S(), index);
break;
case 8:
__ Dup(dst.V8H(), src.V8H(), index);
break;
case 16:
__ Dup(dst.V16B(), src.V16B(), index);
break;
default:
UNREACHABLE();
break;
}
break;
}
case kArm64S128Select: {
VRegister dst = i.OutputSimd128Register().V16B();
DCHECK(dst.is(i.InputSimd128Register(0).V16B()));
__ Bsl(dst, i.InputSimd128Register(1).V16B(),
i.InputSimd128Register(2).V16B());
break;
}
case kArm64S32x4Shuffle: {
Simd128Register dst = i.OutputSimd128Register().V4S(),
src0 = i.InputSimd128Register(0).V4S(),
src1 = i.InputSimd128Register(1).V4S();
// Check for in-place shuffles.
// If dst == src0 == src1, then the shuffle is unary and we only use src0.
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat4S);
if (dst.is(src0)) {
__ Mov(temp, src0);
src0 = temp;
} else if (dst.is(src1)) {
__ Mov(temp, src1);
src1 = temp;
}
// Perform shuffle as a vmov per lane.
int32_t shuffle = i.InputInt32(2);
for (int i = 0; i < 4; i++) {
VRegister src = src0;
int lane = shuffle & 0x7;
if (lane >= 4) {
src = src1;
lane &= 0x3;
}
__ Mov(dst, i, src, lane);
shuffle >>= 8;
}
break;
}
SIMD_BINOP_CASE(kArm64S32x4ZipLeft, Zip1, 4S);
SIMD_BINOP_CASE(kArm64S32x4ZipRight, Zip2, 4S);
SIMD_BINOP_CASE(kArm64S32x4UnzipLeft, Uzp1, 4S);
SIMD_BINOP_CASE(kArm64S32x4UnzipRight, Uzp2, 4S);
SIMD_BINOP_CASE(kArm64S32x4TransposeLeft, Trn1, 4S);
SIMD_BINOP_CASE(kArm64S32x4TransposeRight, Trn2, 4S);
SIMD_BINOP_CASE(kArm64S16x8ZipLeft, Zip1, 8H);
SIMD_BINOP_CASE(kArm64S16x8ZipRight, Zip2, 8H);
SIMD_BINOP_CASE(kArm64S16x8UnzipLeft, Uzp1, 8H);
SIMD_BINOP_CASE(kArm64S16x8UnzipRight, Uzp2, 8H);
SIMD_BINOP_CASE(kArm64S16x8TransposeLeft, Trn1, 8H);
SIMD_BINOP_CASE(kArm64S16x8TransposeRight, Trn2, 8H);
SIMD_BINOP_CASE(kArm64S8x16ZipLeft, Zip1, 16B);
SIMD_BINOP_CASE(kArm64S8x16ZipRight, Zip2, 16B);
SIMD_BINOP_CASE(kArm64S8x16UnzipLeft, Uzp1, 16B);
SIMD_BINOP_CASE(kArm64S8x16UnzipRight, Uzp2, 16B);
SIMD_BINOP_CASE(kArm64S8x16TransposeLeft, Trn1, 16B);
SIMD_BINOP_CASE(kArm64S8x16TransposeRight, Trn2, 16B);
case kArm64S8x16Concat: {
__ Ext(i.OutputSimd128Register().V16B(), i.InputSimd128Register(0).V16B(),
i.InputSimd128Register(1).V16B(), i.InputInt4(2));
break;
}
case kArm64S8x16Shuffle: {
Simd128Register dst = i.OutputSimd128Register().V16B(),
src0 = i.InputSimd128Register(0).V16B(),
src1 = i.InputSimd128Register(1).V16B();
// Unary shuffle table is in src0, binary shuffle table is in src0, src1,
// which must be consecutive.
int64_t mask = 0;
if (src0.is(src1)) {
mask = 0x0F0F0F0F;
} else {
mask = 0x1F1F1F1F;
DCHECK(AreConsecutive(src0, src1));
}
int64_t imm1 =
(i.InputInt32(2) & mask) | ((i.InputInt32(3) & mask) << 32);
int64_t imm2 =
(i.InputInt32(4) & mask) | ((i.InputInt32(5) & mask) << 32);
UseScratchRegisterScope scope(tasm());
VRegister temp = scope.AcquireV(kFormat16B);
__ Movi(temp, imm2, imm1);
if (src0.is(src1)) {
__ Tbl(dst, src0, temp.V16B());
} else {
__ Tbl(dst, src0, src1, temp.V16B());
}
break;
}
SIMD_UNOP_CASE(kArm64S32x2Reverse, Rev64, 4S);
SIMD_UNOP_CASE(kArm64S16x4Reverse, Rev64, 8H);
SIMD_UNOP_CASE(kArm64S16x2Reverse, Rev32, 8H);
SIMD_UNOP_CASE(kArm64S8x8Reverse, Rev64, 16B);
SIMD_UNOP_CASE(kArm64S8x4Reverse, Rev32, 16B);
SIMD_UNOP_CASE(kArm64S8x2Reverse, Rev16, 16B);
#define SIMD_REDUCE_OP_CASE(Op, Instr, format, FORMAT) \
case Op: { \
UseScratchRegisterScope scope(tasm()); \
VRegister temp = scope.AcquireV(format); \
__ Instr(temp, i.InputSimd128Register(0).V##FORMAT()); \
__ Umov(i.OutputRegister32(), temp, 0); \
break; \
}
SIMD_REDUCE_OP_CASE(kArm64S1x4AnyTrue, Umaxv, kFormatS, 4S);
SIMD_REDUCE_OP_CASE(kArm64S1x4AllTrue, Uminv, kFormatS, 4S);
SIMD_REDUCE_OP_CASE(kArm64S1x8AnyTrue, Umaxv, kFormatH, 8H);
SIMD_REDUCE_OP_CASE(kArm64S1x8AllTrue, Uminv, kFormatH, 8H);
SIMD_REDUCE_OP_CASE(kArm64S1x16AnyTrue, Umaxv, kFormatB, 16B);
SIMD_REDUCE_OP_CASE(kArm64S1x16AllTrue, Uminv, kFormatB, 16B);
}
return kSuccess;
} // NOLINT(readability/fn_size)
#undef SIMD_UNOP_CASE
#undef SIMD_WIDENING_UNOP_CASE
#undef SIMD_BINOP_CASE
#undef SIMD_REDUCE_OP_CASE
// Assemble branches after this instruction.
void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
Arm64OperandConverter i(this, instr);
Label* tlabel = branch->true_label;
Label* flabel = branch->false_label;
FlagsCondition condition = branch->condition;
ArchOpcode opcode = instr->arch_opcode();
if (opcode == kArm64CompareAndBranch32) {
DCHECK(FlagsModeField::decode(instr->opcode()) != kFlags_branch_and_poison);
switch (condition) {
case kEqual:
__ Cbz(i.InputRegister32(0), tlabel);
break;
case kNotEqual:
__ Cbnz(i.InputRegister32(0), tlabel);
break;
default:
UNREACHABLE();
}
} else if (opcode == kArm64CompareAndBranch) {
DCHECK(FlagsModeField::decode(instr->opcode()) != kFlags_branch_and_poison);
switch (condition) {
case kEqual:
__ Cbz(i.InputRegister64(0), tlabel);
break;
case kNotEqual:
__ Cbnz(i.InputRegister64(0), tlabel);
break;
default:
UNREACHABLE();
}
} else if (opcode == kArm64TestAndBranch32) {
DCHECK(FlagsModeField::decode(instr->opcode()) != kFlags_branch_and_poison);
switch (condition) {
case kEqual:
__ Tbz(i.InputRegister32(0), i.InputInt5(1), tlabel);
break;
case kNotEqual:
__ Tbnz(i.InputRegister32(0), i.InputInt5(1), tlabel);
break;
default:
UNREACHABLE();
}
} else if (opcode == kArm64TestAndBranch) {
DCHECK(FlagsModeField::decode(instr->opcode()) != kFlags_branch_and_poison);
switch (condition) {
case kEqual:
__ Tbz(i.InputRegister64(0), i.InputInt6(1), tlabel);
break;
case kNotEqual:
__ Tbnz(i.InputRegister64(0), i.InputInt6(1), tlabel);
break;
default:
UNREACHABLE();
}
} else {
Condition cc = FlagsConditionToCondition(condition);
__ B(cc, tlabel);
}
if (!branch->fallthru) __ B(flabel); // no fallthru to flabel.
}
void CodeGenerator::AssembleBranchPoisoning(FlagsCondition condition,
Instruction* instr) {
// TODO(jarin) Handle float comparisons (kUnordered[Not]Equal).
if (condition == kUnorderedEqual || condition == kUnorderedNotEqual) {
return;
}
condition = NegateFlagsCondition(condition);
__ CmovX(kSpeculationPoisonRegister, xzr,
FlagsConditionToCondition(condition));
__ Csdb();
}
void CodeGenerator::AssembleArchDeoptBranch(Instruction* instr,
BranchInfo* branch) {
AssembleArchBranch(instr, branch);
}
void CodeGenerator::AssembleArchJump(RpoNumber target) {
if (!IsNextInAssemblyOrder(target)) __ B(GetLabel(target));
}
void CodeGenerator::AssembleArchTrap(Instruction* instr,
FlagsCondition condition) {
class OutOfLineTrap final : public OutOfLineCode {
public:
OutOfLineTrap(CodeGenerator* gen, Instruction* instr)
: OutOfLineCode(gen), instr_(instr), gen_(gen) {}
void Generate() final {
Arm64OperandConverter i(gen_, instr_);
TrapId trap_id =
static_cast<TrapId>(i.InputInt32(instr_->InputCount() - 1));
GenerateCallToTrap(trap_id);
}
private:
void GenerateCallToTrap(TrapId trap_id) {
if (trap_id == TrapId::kInvalid) {
// 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.
__ CallCFunction(
ExternalReference::wasm_call_trap_callback_for_testing(), 0);
__ LeaveFrame(StackFrame::WASM_COMPILED);
auto call_descriptor = gen_->linkage()->GetIncomingDescriptor();
int pop_count =
static_cast<int>(call_descriptor->StackParameterCount());
pop_count += (pop_count & 1); // align
__ Drop(pop_count);
__ Ret();
} else {
gen_->AssembleSourcePosition(instr_);
// A direct call to a wasm runtime stub defined in this module.
// Just encode the stub index. This will be patched at relocation.
__ Call(static_cast<Address>(trap_id), RelocInfo::WASM_STUB_CALL);
ReferenceMap* reference_map =
new (gen_->zone()) ReferenceMap(gen_->zone());
gen_->RecordSafepoint(reference_map, Safepoint::kSimple, 0,
Safepoint::kNoLazyDeopt);
if (FLAG_debug_code) {
// The trap code should never return.
__ Brk(0);
}
}
}
Instruction* instr_;
CodeGenerator* gen_;
};
auto ool = new (zone()) OutOfLineTrap(this, instr);
Label* tlabel = ool->entry();
Condition cc = FlagsConditionToCondition(condition);
__ B(cc, tlabel);
}
// Assemble boolean materializations after this instruction.
void CodeGenerator::AssembleArchBoolean(Instruction* instr,
FlagsCondition condition) {
Arm64OperandConverter i(this, instr);
// Materialize a full 64-bit 1 or 0 value. The result register is always the
// last output of the instruction.
DCHECK_NE(0u, instr->OutputCount());
Register reg = i.OutputRegister(instr->OutputCount() - 1);
Condition cc = FlagsConditionToCondition(condition);
__ Cset(reg, cc);
}
void CodeGenerator::AssembleArchBinarySearchSwitch(Instruction* instr) {
Arm64OperandConverter i(this, instr);
Register input = i.InputRegister32(0);
std::vector<std::pair<int32_t, Label*>> cases;
for (size_t index = 2; index < instr->InputCount(); index += 2) {
cases.push_back({i.InputInt32(index + 0), GetLabel(i.InputRpo(index + 1))});
}
AssembleArchBinarySearchSwitchRange(input, i.InputRpo(1), cases.data(),
cases.data() + cases.size());
}
void CodeGenerator::AssembleArchLookupSwitch(Instruction* instr) {
Arm64OperandConverter i(this, instr);
Register input = i.InputRegister32(0);
for (size_t index = 2; index < instr->InputCount(); index += 2) {
__ Cmp(input, i.InputInt32(index + 0));
__ B(eq, GetLabel(i.InputRpo(index + 1)));
}
AssembleArchJump(i.InputRpo(1));
}
void CodeGenerator::AssembleArchTableSwitch(Instruction* instr) {
Arm64OperandConverter i(this, instr);
UseScratchRegisterScope scope(tasm());
Register input = i.InputRegister32(0);
Register temp = scope.AcquireX();
size_t const case_count = instr->InputCount() - 2;
Label table;
__ Cmp(input, case_count);
__ B(hs, GetLabel(i.InputRpo(1)));
__ Adr(temp, &table);
__ Add(temp, temp, Operand(input, UXTW, 2));
__ Br(temp);
__ StartBlockPools();
__ Bind(&table);
for (size_t index = 0; index < case_count; ++index) {
__ B(GetLabel(i.InputRpo(index + 2)));
}
__ EndBlockPools();
}
void CodeGenerator::FinishFrame(Frame* frame) {
frame->AlignFrame(16);
auto call_descriptor = linkage()->GetIncomingDescriptor();
// Save FP registers.
CPURegList saves_fp = CPURegList(CPURegister::kVRegister, kDRegSizeInBits,
call_descriptor->CalleeSavedFPRegisters());
int saved_count = saves_fp.Count();
if (saved_count != 0) {
DCHECK(saves_fp.list() == CPURegList::GetCalleeSavedV().list());
DCHECK_EQ(saved_count % 2, 0);
frame->AllocateSavedCalleeRegisterSlots(saved_count *
(kDoubleSize / kPointerSize));
}
CPURegList saves = CPURegList(CPURegister::kRegister, kXRegSizeInBits,
call_descriptor->CalleeSavedRegisters());
saved_count = saves.Count();
if (saved_count != 0) {
DCHECK_EQ(saved_count % 2, 0);
frame->AllocateSavedCalleeRegisterSlots(saved_count);
}
}
void CodeGenerator::AssembleConstructFrame() {
auto call_descriptor = linkage()->GetIncomingDescriptor();
__ AssertSpAligned();
// The frame has been previously padded in CodeGenerator::FinishFrame().
DCHECK_EQ(frame()->GetTotalFrameSlotCount() % 2, 0);
int shrink_slots = frame()->GetTotalFrameSlotCount() -
call_descriptor->CalculateFixedFrameSize();
CPURegList saves = CPURegList(CPURegister::kRegister, kXRegSizeInBits,
call_descriptor->CalleeSavedRegisters());
CPURegList saves_fp = CPURegList(CPURegister::kVRegister, kDRegSizeInBits,
call_descriptor->CalleeSavedFPRegisters());
// The number of slots for returns has to be even to ensure the correct stack
// alignment.
const int returns = RoundUp(frame()->GetReturnSlotCount(), 2);
if (frame_access_state()->has_frame()) {
// Link the frame
if (call_descriptor->IsJSFunctionCall()) {
__ Prologue();
} else {
__ Push(lr, fp);
__ Mov(fp, sp);
}
unwinding_info_writer_.MarkFrameConstructed(__ pc_offset());
// Create OSR entry if applicable
if (info()->is_osr()) {
// TurboFan OSR-compiled functions cannot be entered directly.
__ Abort(AbortReason::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 -= osr_helper()->UnoptimizedFrameSlots();
ResetSpeculationPoison();
}
if (info()->IsWasm() && shrink_slots > 128) {
// For WebAssembly functions with big frames we have to do the stack
// overflow check before we construct the frame. Otherwise we may not
// have enough space on the stack to call the runtime for the stack
// overflow.
Label done;
// If the frame is bigger than the stack, we throw the stack overflow
// exception unconditionally. Thereby we can avoid the integer overflow
// check in the condition code.
if (shrink_slots * kPointerSize < FLAG_stack_size * 1024) {
UseScratchRegisterScope scope(tasm());
Register scratch = scope.AcquireX();
__ Ldr(scratch, FieldMemOperand(
kWasmInstanceRegister,
WasmInstanceObject::kRealStackLimitAddressOffset));
__ Ldr(scratch, MemOperand(scratch));
__ Add(scratch, scratch, shrink_slots *