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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef INCLUDED_FROM_MACRO_ASSEMBLER_H
#error This header must be included via macro-assembler.h
#endif
#ifndef V8_CODEGEN_IA32_MACRO_ASSEMBLER_IA32_H_
#define V8_CODEGEN_IA32_MACRO_ASSEMBLER_IA32_H_
#include <stdint.h>
#include "include/v8-internal.h"
#include "src/base/logging.h"
#include "src/base/macros.h"
#include "src/builtins/builtins.h"
#include "src/codegen/assembler.h"
#include "src/codegen/bailout-reason.h"
#include "src/codegen/cpu-features.h"
#include "src/codegen/ia32/assembler-ia32.h"
#include "src/codegen/ia32/register-ia32.h"
#include "src/codegen/label.h"
#include "src/codegen/reglist.h"
#include "src/codegen/reloc-info.h"
#include "src/codegen/shared-ia32-x64/macro-assembler-shared-ia32-x64.h"
#include "src/codegen/turbo-assembler.h"
#include "src/common/globals.h"
#include "src/execution/frames.h"
#include "src/handles/handles.h"
#include "src/objects/heap-object.h"
#include "src/objects/smi.h"
#include "src/roots/roots.h"
#include "src/runtime/runtime.h"
namespace v8 {
namespace internal {
class Code;
class ExternalReference;
class StatsCounter;
// Convenience for platform-independent signatures. We do not normally
// distinguish memory operands from other operands on ia32.
using MemOperand = Operand;
// TODO(victorgomes): Move definition to macro-assembler.h, once all other
// platforms are updated.
enum class StackLimitKind { kInterruptStackLimit, kRealStackLimit };
// Convenient class to access arguments below the stack pointer.
class StackArgumentsAccessor {
public:
// argc = the number of arguments not including the receiver.
explicit StackArgumentsAccessor(Register argc) : argc_(argc) {
DCHECK_NE(argc_, no_reg);
}
// Argument 0 is the receiver (despite argc not including the receiver).
Operand operator[](int index) const { return GetArgumentOperand(index); }
Operand GetArgumentOperand(int index) const;
Operand GetReceiverOperand() const { return GetArgumentOperand(0); }
private:
const Register argc_;
DISALLOW_IMPLICIT_CONSTRUCTORS(StackArgumentsAccessor);
};
class V8_EXPORT_PRIVATE TurboAssembler : public SharedTurboAssembler {
public:
using SharedTurboAssembler::SharedTurboAssembler;
void CheckPageFlag(Register object, Register scratch, int mask, Condition cc,
Label* condition_met,
Label::Distance condition_met_distance = Label::kFar);
// Activation support.
void EnterFrame(StackFrame::Type type);
void EnterFrame(StackFrame::Type type, bool load_constant_pool_pointer_reg) {
// Out-of-line constant pool not implemented on ia32.
UNREACHABLE();
}
void LeaveFrame(StackFrame::Type type);
// Allocate stack space of given size (i.e. decrement {esp} by the value
// stored in the given register, or by a constant). If you need to perform a
// stack check, do it before calling this function because this function may
// write into the newly allocated space. It may also overwrite the given
// register's value, in the version that takes a register.
#ifdef V8_OS_WIN
void AllocateStackSpace(Register bytes_scratch);
void AllocateStackSpace(int bytes);
#else
void AllocateStackSpace(Register bytes) { sub(esp, bytes); }
void AllocateStackSpace(int bytes) {
DCHECK_GE(bytes, 0);
if (bytes == 0) return;
sub(esp, Immediate(bytes));
}
#endif
// Print a message to stdout and abort execution.
void Abort(AbortReason reason);
// Calls Abort(msg) if the condition cc is not satisfied.
// Use --debug_code to enable.
void Assert(Condition cc, AbortReason reason);
// Like Assert(), but without condition.
// Use --debug_code to enable.
void AssertUnreachable(AbortReason reason);
// Like Assert(), but always enabled.
void Check(Condition cc, AbortReason reason);
// Check that the stack is aligned.
void CheckStackAlignment();
// Move a constant into a destination using the most efficient encoding.
void Move(Register dst, int32_t x) {
if (x == 0) {
xor_(dst, dst);
} else {
mov(dst, Immediate(x));
}
}
void Move(Register dst, const Immediate& src);
void Move(Register dst, Smi src) { Move(dst, Immediate(src)); }
void Move(Register dst, Handle<HeapObject> src);
void Move(Register dst, Register src);
void Move(Register dst, Operand src);
void Move(Operand dst, const Immediate& src);
// Move an immediate into an XMM register.
void Move(XMMRegister dst, uint32_t src);
void Move(XMMRegister dst, uint64_t src);
void Move(XMMRegister dst, float src) { Move(dst, bit_cast<uint32_t>(src)); }
void Move(XMMRegister dst, double src) { Move(dst, bit_cast<uint64_t>(src)); }
Operand EntryFromBuiltinAsOperand(Builtin builtin);
void Call(Register reg) { call(reg); }
void Call(Operand op) { call(op); }
void Call(Label* target) { call(target); }
void Call(Handle<Code> code_object, RelocInfo::Mode rmode);
// Load the builtin given by the Smi in |builtin_index| into the same
// register.
void LoadEntryFromBuiltinIndex(Register builtin_index);
void CallBuiltinByIndex(Register builtin_index);
void CallBuiltin(Builtin builtin);
void LoadCodeObjectEntry(Register destination, Register code_object);
void CallCodeObject(Register code_object);
void JumpCodeObject(Register code_object,
JumpMode jump_mode = JumpMode::kJump);
void Jump(const ExternalReference& reference);
void Jump(Handle<Code> code_object, RelocInfo::Mode rmode);
void LoadMap(Register destination, Register object);
void Trap();
void DebugBreak();
void CallForDeoptimization(Builtin target, int deopt_id, Label* exit,
DeoptimizeKind kind, Label* ret,
Label* jump_deoptimization_entry_label);
// Jump the register contains a smi.
inline void JumpIfSmi(Register value, Label* smi_label,
Label::Distance distance = Label::kFar) {
test(value, Immediate(kSmiTagMask));
j(zero, smi_label, distance);
}
// Jump if the operand is a smi.
inline void JumpIfSmi(Operand value, Label* smi_label,
Label::Distance distance = Label::kFar) {
test(value, Immediate(kSmiTagMask));
j(zero, smi_label, distance);
}
void JumpIfEqual(Register a, int32_t b, Label* dest) {
cmp(a, Immediate(b));
j(equal, dest);
}
void JumpIfLessThan(Register a, int32_t b, Label* dest) {
cmp(a, Immediate(b));
j(less, dest);
}
void SmiUntag(Register reg) { sar(reg, kSmiTagSize); }
void SmiUntag(Register output, Register value) {
mov(output, value);
SmiUntag(output);
}
// Before calling a C-function from generated code, align arguments on stack.
// After aligning the frame, arguments must be stored in esp[0], esp[4],
// etc., not pushed. The argument count assumes all arguments are word sized.
// Some compilers/platforms require the stack to be aligned when calling
// C++ code.
// Needs a scratch register to do some arithmetic. This register will be
// trashed.
void PrepareCallCFunction(int num_arguments, Register scratch);
// Calls a C function and cleans up the space for arguments allocated
// by PrepareCallCFunction. The called function is not allowed to trigger a
// garbage collection, since that might move the code and invalidate the
// return address (unless this is somehow accounted for by the called
// function).
void CallCFunction(ExternalReference function, int num_arguments);
void CallCFunction(Register function, int num_arguments);
void ShlPair(Register high, Register low, uint8_t imm8);
void ShlPair_cl(Register high, Register low);
void ShrPair(Register high, Register low, uint8_t imm8);
void ShrPair_cl(Register high, Register low);
void SarPair(Register high, Register low, uint8_t imm8);
void SarPair_cl(Register high, Register low);
// Generates function and stub prologue code.
void StubPrologue(StackFrame::Type type);
void Prologue();
// Helpers for argument handling
enum ArgumentsCountMode { kCountIncludesReceiver, kCountExcludesReceiver };
enum ArgumentsCountType { kCountIsInteger, kCountIsSmi, kCountIsBytes };
void DropArguments(Register count, Register scratch, ArgumentsCountType type,
ArgumentsCountMode mode);
void DropArgumentsAndPushNewReceiver(Register argc, Register receiver,
Register scratch,
ArgumentsCountType type,
ArgumentsCountMode mode);
void DropArgumentsAndPushNewReceiver(Register argc, Operand receiver,
Register scratch,
ArgumentsCountType type,
ArgumentsCountMode mode);
void Lzcnt(Register dst, Register src) { Lzcnt(dst, Operand(src)); }
void Lzcnt(Register dst, Operand src);
void Tzcnt(Register dst, Register src) { Tzcnt(dst, Operand(src)); }
void Tzcnt(Register dst, Operand src);
void Popcnt(Register dst, Register src) { Popcnt(dst, Operand(src)); }
void Popcnt(Register dst, Operand src);
void PushReturnAddressFrom(Register src) { push(src); }
void PopReturnAddressTo(Register dst) { pop(dst); }
void PushReturnAddressFrom(XMMRegister src, Register scratch) {
Push(src, scratch);
}
void PopReturnAddressTo(XMMRegister dst, Register scratch) {
Pop(dst, scratch);
}
void Ret();
// Root register utility functions.
void InitializeRootRegister();
Operand RootAsOperand(RootIndex index);
void LoadRoot(Register destination, RootIndex index) final;
// Indirect root-relative loads.
void LoadFromConstantsTable(Register destination, int constant_index) final;
void LoadRootRegisterOffset(Register destination, intptr_t offset) final;
void LoadRootRelative(Register destination, int32_t offset) final;
void PushPC();
enum class PushArrayOrder { kNormal, kReverse };
// `array` points to the first element (the lowest address).
// `array` and `size` are not modified.
void PushArray(Register array, Register size, Register scratch,
PushArrayOrder order = PushArrayOrder::kNormal);
// Operand pointing to an external reference.
// May emit code to set up the scratch register. The operand is
// only guaranteed to be correct as long as the scratch register
// isn't changed.
// If the operand is used more than once, use a scratch register
// that is guaranteed not to be clobbered.
Operand ExternalReferenceAsOperand(ExternalReference reference,
Register scratch);
Operand ExternalReferenceAddressAsOperand(ExternalReference reference);
Operand HeapObjectAsOperand(Handle<HeapObject> object);
void LoadAddress(Register destination, ExternalReference source);
void CompareRoot(Register with, RootIndex index);
void CompareRoot(Register with, Register scratch, RootIndex index);
// Return and drop arguments from stack, where the number of arguments
// may be bigger than 2^16 - 1. Requires a scratch register.
void Ret(int bytes_dropped, Register scratch);
// Defined here because some callers take a pointer to member functions.
AVX_OP(Pcmpeqb, pcmpeqb)
AVX_OP(Pcmpeqw, pcmpeqw)
AVX_OP(Pcmpeqd, pcmpeqd)
AVX_OP_SSE4_1(Pcmpeqq, pcmpeqq)
// Macro for instructions that have 2 operands for AVX version and 1 operand for
// SSE version. Will move src1 to dst if dst != src1.
#define AVX_OP3_WITH_MOVE(macro_name, name, dst_type, src_type) \
void macro_name(dst_type dst, dst_type src1, src_type src2) { \
if (CpuFeatures::IsSupported(AVX)) { \
CpuFeatureScope scope(this, AVX); \
v##name(dst, src1, src2); \
} else { \
if (dst != src1) { \
movaps(dst, src1); \
} \
name(dst, src2); \
} \
}
AVX_OP3_WITH_MOVE(Cmpeqps, cmpeqps, XMMRegister, XMMRegister)
AVX_OP3_WITH_MOVE(Movlps, movlps, XMMRegister, Operand)
AVX_OP3_WITH_MOVE(Movhps, movhps, XMMRegister, Operand)
AVX_OP3_WITH_MOVE(Pmaddwd, pmaddwd, XMMRegister, Operand)
#undef AVX_OP3_WITH_MOVE
// TODO(zhin): Remove after moving more definitions into SharedTurboAssembler.
void Movlps(Operand dst, XMMRegister src) {
SharedTurboAssembler::Movlps(dst, src);
}
void Movhps(Operand dst, XMMRegister src) {
SharedTurboAssembler::Movhps(dst, src);
}
void Pshufb(XMMRegister dst, XMMRegister src) { Pshufb(dst, dst, src); }
void Pshufb(XMMRegister dst, Operand src) { Pshufb(dst, dst, src); }
// Handles SSE and AVX. On SSE, moves src to dst if they are not equal.
void Pshufb(XMMRegister dst, XMMRegister src, XMMRegister mask) {
Pshufb(dst, src, Operand(mask));
}
void Pshufb(XMMRegister dst, XMMRegister src, Operand mask);
void Pextrd(Register dst, XMMRegister src, uint8_t imm8);
void Pinsrb(XMMRegister dst, Register src, int8_t imm8) {
Pinsrb(dst, Operand(src), imm8);
}
void Pinsrb(XMMRegister dst, Operand src, int8_t imm8);
// Moves src1 to dst if AVX is not supported.
void Pinsrb(XMMRegister dst, XMMRegister src1, Operand src2, int8_t imm8);
void Pinsrd(XMMRegister dst, Register src, uint8_t imm8) {
Pinsrd(dst, Operand(src), imm8);
}
void Pinsrd(XMMRegister dst, Operand src, uint8_t imm8);
// Moves src1 to dst if AVX is not supported.
void Pinsrd(XMMRegister dst, XMMRegister src1, Operand src2, uint8_t imm8);
void Pinsrw(XMMRegister dst, Register src, int8_t imm8) {
Pinsrw(dst, Operand(src), imm8);
}
void Pinsrw(XMMRegister dst, Operand src, int8_t imm8);
// Moves src1 to dst if AVX is not supported.
void Pinsrw(XMMRegister dst, XMMRegister src1, Operand src2, int8_t imm8);
void Vbroadcastss(XMMRegister dst, Operand src);
// Expression support
// cvtsi2sd instruction only writes to the low 64-bit of dst register, which
// hinders register renaming and makes dependence chains longer. So we use
// xorps to clear the dst register before cvtsi2sd to solve this issue.
void Cvtsi2ss(XMMRegister dst, Register src) { Cvtsi2ss(dst, Operand(src)); }
void Cvtsi2ss(XMMRegister dst, Operand src);
void Cvtsi2sd(XMMRegister dst, Register src) { Cvtsi2sd(dst, Operand(src)); }
void Cvtsi2sd(XMMRegister dst, Operand src);
void Cvtui2ss(XMMRegister dst, Register src, Register tmp) {
Cvtui2ss(dst, Operand(src), tmp);
}
void Cvtui2ss(XMMRegister dst, Operand src, Register tmp);
void Cvttss2ui(Register dst, XMMRegister src, XMMRegister tmp) {
Cvttss2ui(dst, Operand(src), tmp);
}
void Cvttss2ui(Register dst, Operand src, XMMRegister tmp);
void Cvtui2sd(XMMRegister dst, Register src, Register scratch) {
Cvtui2sd(dst, Operand(src), scratch);
}
void Cvtui2sd(XMMRegister dst, Operand src, Register scratch);
void Cvttsd2ui(Register dst, XMMRegister src, XMMRegister tmp) {
Cvttsd2ui(dst, Operand(src), tmp);
}
void Cvttsd2ui(Register dst, Operand src, XMMRegister tmp);
// Handles SSE and AVX. On SSE, moves src to dst if they are not equal.
void Pmulhrsw(XMMRegister dst, XMMRegister src1, XMMRegister src2);
// These Wasm SIMD ops do not have direct lowerings on IA32. These
// helpers are optimized to produce the fastest and smallest codegen.
// Defined here to allow usage on both TurboFan and Liftoff.
void I16x8Q15MulRSatS(XMMRegister dst, XMMRegister src1, XMMRegister src2,
XMMRegister scratch);
void I8x16Popcnt(XMMRegister dst, XMMRegister src, XMMRegister tmp1,
XMMRegister tmp2, Register scratch);
void F64x2ConvertLowI32x4U(XMMRegister dst, XMMRegister src, Register tmp);
void I32x4TruncSatF64x2SZero(XMMRegister dst, XMMRegister src,
XMMRegister scratch, Register tmp);
void I32x4TruncSatF64x2UZero(XMMRegister dst, XMMRegister src,
XMMRegister scratch, Register tmp);
void I16x8ExtAddPairwiseI8x16S(XMMRegister dst, XMMRegister src,
XMMRegister tmp, Register scratch);
void I16x8ExtAddPairwiseI8x16U(XMMRegister dst, XMMRegister src,
Register scratch);
void I32x4ExtAddPairwiseI16x8S(XMMRegister dst, XMMRegister src,
Register scratch);
void I32x4ExtAddPairwiseI16x8U(XMMRegister dst, XMMRegister src,
XMMRegister tmp);
void I8x16Swizzle(XMMRegister dst, XMMRegister src, XMMRegister mask,
XMMRegister scratch, Register tmp, bool omit_add = false);
void Push(Register src) { push(src); }
void Push(Operand src) { push(src); }
void Push(Immediate value);
void Push(Handle<HeapObject> handle) { push(Immediate(handle)); }
void Push(Smi smi) { Push(Immediate(smi)); }
void Push(XMMRegister src, Register scratch) {
movd(scratch, src);
push(scratch);
}
void Pop(Register dst) { pop(dst); }
void Pop(Operand dst) { pop(dst); }
void Pop(XMMRegister dst, Register scratch) {
pop(scratch);
movd(dst, scratch);
}
void MaybeSaveRegisters(RegList registers);
void MaybeRestoreRegisters(RegList registers);
void CallEphemeronKeyBarrier(Register object, Register slot_address,
SaveFPRegsMode fp_mode);
void CallRecordWriteStubSaveRegisters(
Register object, Register slot_address,
RememberedSetAction remembered_set_action, SaveFPRegsMode fp_mode,
StubCallMode mode = StubCallMode::kCallBuiltinPointer);
void CallRecordWriteStub(
Register object, Register slot_address,
RememberedSetAction remembered_set_action, SaveFPRegsMode fp_mode,
StubCallMode mode = StubCallMode::kCallBuiltinPointer);
// Calculate how much stack space (in bytes) are required to store caller
// registers excluding those specified in the arguments.
int RequiredStackSizeForCallerSaved(SaveFPRegsMode fp_mode,
Register exclusion1 = no_reg,
Register exclusion2 = no_reg,
Register exclusion3 = no_reg) const;
// PushCallerSaved and PopCallerSaved do not arrange the registers in any
// particular order so they are not useful for calls that can cause a GC.
// The caller can exclude up to 3 registers that do not need to be saved and
// restored.
// Push caller saved registers on the stack, and return the number of bytes
// stack pointer is adjusted.
int PushCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1 = no_reg,
Register exclusion2 = no_reg,
Register exclusion3 = no_reg);
// Restore caller saved registers from the stack, and return the number of
// bytes stack pointer is adjusted.
int PopCallerSaved(SaveFPRegsMode fp_mode, Register exclusion1 = no_reg,
Register exclusion2 = no_reg,
Register exclusion3 = no_reg);
// Compute the start of the generated instruction stream from the current PC.
// This is an alternative to embedding the {CodeObject} handle as a reference.
void ComputeCodeStartAddress(Register dst);
// Control-flow integrity:
// Define a function entrypoint. This doesn't emit any code for this
// architecture, as control-flow integrity is not supported for it.
void CodeEntry() {}
// Define an exception handler.
void ExceptionHandler() {}
// Define an exception handler and bind a label.
void BindExceptionHandler(Label* label) { bind(label); }
protected:
// Drops arguments assuming that the return address was already popped.
void DropArguments(Register count, ArgumentsCountType type = kCountIsInteger,
ArgumentsCountMode mode = kCountExcludesReceiver);
};
// MacroAssembler implements a collection of frequently used macros.
class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler {
public:
using TurboAssembler::TurboAssembler;
void PushRoot(RootIndex index);
// Compare the object in a register to a value and jump if they are equal.
void JumpIfRoot(Register with, RootIndex index, Label* if_equal,
Label::Distance if_equal_distance = Label::kFar) {
CompareRoot(with, index);
j(equal, if_equal, if_equal_distance);
}
// Compare the object in a register to a value and jump if they are not equal.
void JumpIfNotRoot(Register with, RootIndex index, Label* if_not_equal,
Label::Distance if_not_equal_distance = Label::kFar) {
CompareRoot(with, index);
j(not_equal, if_not_equal, if_not_equal_distance);
}
// Checks if value is in range [lower_limit, higher_limit] using a single
// comparison.
void JumpIfIsInRange(Register value, unsigned lower_limit,
unsigned higher_limit, Register scratch,
Label* on_in_range,
Label::Distance near_jump = Label::kFar);
// ---------------------------------------------------------------------------
// GC Support
// Notify the garbage collector that we wrote a pointer into an object.
// |object| is the object being stored into, |value| is the object being
// stored. value and scratch registers are clobbered by the operation.
// The offset is the offset from the start of the object, not the offset from
// the tagged HeapObject pointer. For use with FieldOperand(reg, off).
void RecordWriteField(
Register object, int offset, Register value, Register scratch,
SaveFPRegsMode save_fp,
RememberedSetAction remembered_set_action = RememberedSetAction::kEmit,
SmiCheck smi_check = SmiCheck::kInline);
// For page containing |object| mark region covering |address|
// dirty. |object| is the object being stored into, |value| is the
// object being stored. The address and value registers are clobbered by the
// operation. RecordWrite filters out smis so it does not update the
// write barrier if the value is a smi.
void RecordWrite(
Register object, Register address, Register value, SaveFPRegsMode save_fp,
RememberedSetAction remembered_set_action = RememberedSetAction::kEmit,
SmiCheck smi_check = SmiCheck::kInline);
// Enter specific kind of exit frame. Expects the number of
// arguments in register eax and sets up the number of arguments in
// register edi and the pointer to the first argument in register
// esi.
void EnterExitFrame(int argc, bool save_doubles, StackFrame::Type frame_type);
void EnterApiExitFrame(int argc, Register scratch);
// Leave the current exit frame. Expects the return value in
// register eax:edx (untouched) and the pointer to the first
// argument in register esi (if pop_arguments == true).
void LeaveExitFrame(bool save_doubles, bool pop_arguments = true);
// Leave the current exit frame. Expects the return value in
// register eax (untouched).
void LeaveApiExitFrame();
// Load the global proxy from the current context.
void LoadGlobalProxy(Register dst);
// Load a value from the native context with a given index.
void LoadNativeContextSlot(Register dst, int index);
// ---------------------------------------------------------------------------
// JavaScript invokes
// Invoke the JavaScript function code by either calling or jumping.
void InvokeFunctionCode(Register function, Register new_target,
Register expected_parameter_count,
Register actual_parameter_count, InvokeType type);
// On function call, call into the debugger.
// This may clobber ecx.
void CallDebugOnFunctionCall(Register fun, Register new_target,
Register expected_parameter_count,
Register actual_parameter_count);
// Invoke the JavaScript function in the given register. Changes the
// current context to the context in the function before invoking.
void InvokeFunction(Register function, Register new_target,
Register actual_parameter_count, InvokeType type);
// Compare object type for heap object.
// Incoming register is heap_object and outgoing register is map.
void CmpObjectType(Register heap_object, InstanceType type, Register map);
// Compare instance type for map.
void CmpInstanceType(Register map, InstanceType type);
// Compare instance type ranges for a map (lower_limit and higher_limit
// inclusive).
//
// Always use unsigned comparisons: below_equal for a positive
// result.
void CmpInstanceTypeRange(Register map, Register scratch,
InstanceType lower_limit,
InstanceType higher_limit);
// Smi tagging support.
void SmiTag(Register reg) {
STATIC_ASSERT(kSmiTag == 0);
STATIC_ASSERT(kSmiTagSize == 1);
add(reg, reg);
}
// Jump if register contain a non-smi.
inline void JumpIfNotSmi(Register value, Label* not_smi_label,
Label::Distance distance = Label::kFar) {
test(value, Immediate(kSmiTagMask));
j(not_zero, not_smi_label, distance);
}
// Jump if the operand is not a smi.
inline void JumpIfNotSmi(Operand value, Label* smi_label,
Label::Distance distance = Label::kFar) {
test(value, Immediate(kSmiTagMask));
j(not_zero, smi_label, distance);
}
template <typename Field>
void DecodeField(Register reg) {
static const int shift = Field::kShift;
static const int mask = Field::kMask >> Field::kShift;
if (shift != 0) {
sar(reg, shift);
}
and_(reg, Immediate(mask));
}
// Abort execution if argument is not a smi, enabled via --debug-code.
void AssertSmi(Register object);
// Abort execution if argument is a smi, enabled via --debug-code.
void AssertNotSmi(Register object);
// Abort execution if argument is not a JSFunction, enabled via --debug-code.
void AssertFunction(Register object, Register scratch);
// Abort execution if argument is not a Constructor, enabled via --debug-code.
void AssertConstructor(Register object);
// Abort execution if argument is not a JSBoundFunction,
// enabled via --debug-code.
void AssertBoundFunction(Register object);
// Abort execution if argument is not a JSGeneratorObject (or subclass),
// enabled via --debug-code.
void AssertGeneratorObject(Register object);
// Abort execution if argument is not undefined or an AllocationSite, enabled
// via --debug-code.
void AssertUndefinedOrAllocationSite(Register object, Register scratch);
// ---------------------------------------------------------------------------
// Exception handling
// Push a new stack handler and link it into stack handler chain.
void PushStackHandler(Register scratch);
// Unlink the stack handler on top of the stack from the stack handler chain.
void PopStackHandler(Register scratch);
// ---------------------------------------------------------------------------
// Runtime calls
// Call a runtime routine.
void CallRuntime(const Runtime::Function* f, int num_arguments,
SaveFPRegsMode save_doubles = SaveFPRegsMode::kIgnore);
// Convenience function: Same as above, but takes the fid instead.
void CallRuntime(Runtime::FunctionId fid,
SaveFPRegsMode save_doubles = SaveFPRegsMode::kIgnore) {
const Runtime::Function* function = Runtime::FunctionForId(fid);
CallRuntime(function, function->nargs, save_doubles);
}
// Convenience function: Same as above, but takes the fid instead.
void CallRuntime(Runtime::FunctionId fid, int num_arguments,
SaveFPRegsMode save_doubles = SaveFPRegsMode::kIgnore) {
CallRuntime(Runtime::FunctionForId(fid), num_arguments, save_doubles);
}
// Convenience function: tail call a runtime routine (jump).
void TailCallRuntime(Runtime::FunctionId fid);
// Jump to a runtime routine.
void JumpToExternalReference(const ExternalReference& ext,
bool builtin_exit_frame = false);
// Generates a trampoline to jump to the off-heap instruction stream.
void JumpToInstructionStream(Address entry);
// ---------------------------------------------------------------------------
// Utilities
// Emit code to discard a non-negative number of pointer-sized elements
// from the stack, clobbering only the esp register.
void Drop(int element_count);
// ---------------------------------------------------------------------------
// In-place weak references.
void LoadWeakValue(Register in_out, Label* target_if_cleared);
// ---------------------------------------------------------------------------
// StatsCounter support
void IncrementCounter(StatsCounter* counter, int value, Register scratch) {
if (!FLAG_native_code_counters) return;
EmitIncrementCounter(counter, value, scratch);
}
void EmitIncrementCounter(StatsCounter* counter, int value, Register scratch);
void DecrementCounter(StatsCounter* counter, int value, Register scratch) {
if (!FLAG_native_code_counters) return;
EmitDecrementCounter(counter, value, scratch);
}
void EmitDecrementCounter(StatsCounter* counter, int value, Register scratch);
// ---------------------------------------------------------------------------
// Stack limit utilities
void CompareStackLimit(Register with, StackLimitKind kind);
void StackOverflowCheck(Register num_args, Register scratch,
Label* stack_overflow, bool include_receiver = false);
static int SafepointRegisterStackIndex(Register reg) {
return SafepointRegisterStackIndex(reg.code());
}
private:
// Helper functions for generating invokes.
void InvokePrologue(Register expected_parameter_count,
Register actual_parameter_count, Label* done,
InvokeType type);
void EnterExitFramePrologue(StackFrame::Type frame_type, Register scratch);
void EnterExitFrameEpilogue(int argc, bool save_doubles);
void LeaveExitFrameEpilogue();
// Compute memory operands for safepoint stack slots.
static int SafepointRegisterStackIndex(int reg_code);
// Needs access to SafepointRegisterStackIndex for compiled frame
// traversal.
friend class CommonFrame;
DISALLOW_IMPLICIT_CONSTRUCTORS(MacroAssembler);
};
// -----------------------------------------------------------------------------
// Static helper functions.
// Generate an Operand for loading a field from an object.
inline Operand FieldOperand(Register object, int offset) {
return Operand(object, offset - kHeapObjectTag);
}
// Generate an Operand for loading an indexed field from an object.
inline Operand FieldOperand(Register object, Register index, ScaleFactor scale,
int offset) {
return Operand(object, index, scale, offset - kHeapObjectTag);
}
#define ACCESS_MASM(masm) masm->
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_IA32_MACRO_ASSEMBLER_IA32_H_
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