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AssemblyHelpers.h
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2120 lines (1859 loc) · 73 KB
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/*
* Copyright (C) 2011-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(JIT)
#include "CodeBlock.h"
#include "EntryFrame.h"
#include "FPRInfo.h"
#include "GPRInfo.h"
#include "Heap.h"
#include "InlineCallFrame.h"
#include "JITAllocator.h"
#include "JITCode.h"
#include "JSBigInt.h"
#include "JSCell.h"
#include "MacroAssembler.h"
#include "MarkedSpace.h"
#include "RegisterAtOffsetList.h"
#include "RegisterSet.h"
#include "ScratchRegisterAllocator.h"
#include "StackAlignment.h"
#include "TagRegistersMode.h"
#include "TypeofType.h"
#include "VM.h"
#include <variant>
#include <wtf/TZoneMalloc.h>
namespace JSC {
typedef void (*V_DebugOperation_EPP)(CallFrame*, void*, void*);
class AssemblyHelpers : public MacroAssembler {
WTF_MAKE_TZONE_ALLOCATED(AssemblyHelpers);
public:
AssemblyHelpers(CodeBlock* codeBlock)
: m_codeBlock(codeBlock)
, m_baselineCodeBlock(codeBlock ? codeBlock->baselineAlternative() : nullptr)
{
if (m_codeBlock) {
ASSERT(m_baselineCodeBlock);
ASSERT(!m_baselineCodeBlock->alternative());
ASSERT(m_baselineCodeBlock->jitType() == JITType::None || JITCode::isBaselineCode(m_baselineCodeBlock->jitType()));
}
}
CodeBlock* codeBlock() { return m_codeBlock; }
VM& vm() { return m_codeBlock->vm(); }
AssemblerType_T& assembler() { return m_assembler; }
void prepareCallOperation(VM& vm)
{
UNUSED_PARAM(vm);
#if !USE(BUILTIN_FRAME_ADDRESS) || ASSERT_ENABLED
storePtr(GPRInfo::callFrameRegister, &vm.topCallFrame);
#endif
}
#if USE(JSVALUE32_64)
template <typename Tag, typename Payload, typename Dst>
void storeAndFence32(Tag&& tag, Payload&& payload, Dst&& dst)
{
static_assert(!PayloadOffset && TagOffset == 4, "Assumes little-endian system");
auto const finish = [&](auto&& tagDst) {
if (Options::useConcurrentJIT()) {
store32(TrustedImm32(JSValue::InvalidTag), tagDst);
storeFence();
store32(payload, dst);
storeFence();
store32(tag, tagDst);
} else {
store32(payload, dst);
store32(tag, tagDst);
}
};
if constexpr (std::is_pointer_v<std::remove_reference_t<Dst>>) {
void* tagAddr = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(dst) + TagOffset);
finish(tagAddr);
} else
finish(dst.withOffset(TagOffset));
}
#endif
#if ENABLE(WEBASSEMBLY)
void prepareWasmCallOperation(GPRReg instanceGPR);
#endif
void checkStackPointerAlignment()
{
// This check is both unneeded and harder to write correctly for ARM64
#if !defined(NDEBUG) && !CPU(ARM64)
Jump stackPointerAligned = branchTestPtr(Zero, stackPointerRegister, TrustedImm32(0xf));
abortWithReason(AHStackPointerMisaligned);
stackPointerAligned.link(this);
#endif
}
#if USE(JSVALUE64)
void store64FromReg(Reg src, Address dst)
{
if (src.isFPR())
storeDouble(src.fpr(), dst);
else
store64(src.gpr(), dst);
}
#endif
void store32FromReg(Reg src, Address dst)
{
if (src.isFPR())
storeFloat(src.fpr(), dst);
else
store32(src.gpr(), dst);
}
void storeReg(Reg src, Address dst)
{
#if USE(JSVALUE64)
store64FromReg(src, dst);
#else
store32FromReg(src, dst);
#endif
}
#if USE(JSVALUE64)
void load64ToReg(Address src, Reg dst)
{
if (dst.isFPR())
loadDouble(src, dst.fpr());
else
load64(src, dst.gpr());
}
#endif
void load32ToReg(Address src, Reg dst)
{
if (dst.isFPR())
loadFloat(src, dst.fpr());
else
load32(src, dst.gpr());
}
void loadReg(Address src, Reg dst)
{
#if USE(JSVALUE64)
load64ToReg(src, dst);
#else
load32ToReg(src, dst);
#endif
}
#if USE(JSVALUE64)
template<typename T, typename U>
void storeCell(T cell, U address)
{
store64(cell, address);
}
#else
void storeCell(GPRReg cell, Address address)
{
storeAndFence32(TrustedImm32(JSValue::CellTag), cell, address);
}
#endif
#if USE(JSVALUE64)
template<typename U>
void storeCell(GPRReg cell, U address)
{
store64(cell, address);
}
#else
void storeCell(GPRReg cell, void* address)
{
storeAndFence32(TrustedImm32(JSValue::CellTag), cell, address);
}
#endif
void storeCell(JSValueRegs regs, void* address)
{
#if USE(JSVALUE64)
store64(regs.gpr(), address);
#else
move(AssemblyHelpers::TrustedImm32(JSValue::CellTag), regs.tagGPR());
storeAndFence32(regs.tagGPR(), regs.payloadGPR(), address);
#endif
}
#if USE(JSVALUE32_64)
void storeCell(TrustedImmPtr cell, Address address)
{
#if USE(JSVALUE64)
store64(cell, address);
#else
storeAndFence32(TrustedImm32(JSValue::CellTag), TrustedImm32(cell.asIntptr()), address);
#endif
}
void storeCell(const void* address)
{
store32(AssemblyHelpers::TrustedImm32(JSValue::CellTag), address);
}
#endif
void loadCell(Address address, GPRReg gpr)
{
#if USE(JSVALUE64)
load64(address, gpr);
#else
load32(address.withOffset(PayloadOffset), gpr);
#endif
}
void storeValue(JSValueRegs regs, Address address)
{
#if USE(JSVALUE64)
store64(regs.gpr(), address);
#else
storeAndFence32(regs.tagGPR(), regs.payloadGPR(), address);
#endif
}
void storeValue(JSValueRegs regs, BaseIndex address)
{
#if USE(JSVALUE64)
store64(regs.gpr(), address);
#else
storeAndFence32(regs.tagGPR(), regs.payloadGPR(), address);
#endif
}
void storeValue(JSValueRegs regs, void* address)
{
#if USE(JSVALUE64)
store64(regs.gpr(), address);
#else
storeAndFence32(regs.tagGPR(), regs.payloadGPR(), address);
#endif
}
void loadValue(Address address, JSValueRegs regs)
{
#if USE(JSVALUE64)
load64(address, regs.gpr());
#else
static_assert(!PayloadOffset && TagOffset == 4, "Assumes little-endian system");
loadPair32(address, regs.payloadGPR(), regs.tagGPR());
#endif
}
void loadValue(BaseIndex address, JSValueRegs regs)
{
#if USE(JSVALUE64)
load64(address, regs.gpr());
#else
static_assert(!PayloadOffset && TagOffset == 4, "Assumes little-endian system");
loadPair32(address, regs.payloadGPR(), regs.tagGPR());
#endif
}
void loadValue(void* address, JSValueRegs regs)
{
#if USE(JSVALUE64)
load64(address, regs.gpr());
#else
loadPair32(AbsoluteAddress(address), regs.payloadGPR(), regs.tagGPR());
#endif
}
// Note that these clobber offset.
void loadProperty(GPRReg object, GPRReg offset, JSValueRegs result);
void storeProperty(JSValueRegs value, GPRReg object, GPRReg offset, GPRReg scratch);
JumpList loadMegamorphicProperty(VM&, GPRReg baseGPR, GPRReg uidGPR, UniquedStringImpl*, GPRReg resultGPR, GPRReg scratch1GPR, GPRReg scratch2GPR, GPRReg scratch3GPR);
std::tuple<JumpList, JumpList> storeMegamorphicProperty(VM&, GPRReg baseGPR, GPRReg uidGPR, UniquedStringImpl*, GPRReg valueGPR, GPRReg scratch1GPR, GPRReg scratch2GPR, GPRReg scratch3GPR);
JumpList hasMegamorphicProperty(VM&, GPRReg baseGPR, GPRReg uidGPR, UniquedStringImpl*, GPRReg resultGPR, GPRReg scratch1GPR, GPRReg scratch2GPR, GPRReg scratch3GPR);
void moveValueRegs(JSValueRegs srcRegs, JSValueRegs destRegs)
{
#if USE(JSVALUE32_64)
if (destRegs.tagGPR() == srcRegs.payloadGPR()) {
if (destRegs.payloadGPR() == srcRegs.tagGPR()) {
swap(srcRegs.payloadGPR(), srcRegs.tagGPR());
return;
}
move(srcRegs.payloadGPR(), destRegs.payloadGPR());
move(srcRegs.tagGPR(), destRegs.tagGPR());
return;
}
move(srcRegs.tagGPR(), destRegs.tagGPR());
move(srcRegs.payloadGPR(), destRegs.payloadGPR());
#else
move(srcRegs.gpr(), destRegs.gpr());
#endif
}
void moveValue(JSValue value, JSValueRegs regs)
{
#if USE(JSVALUE64)
move(Imm64(JSValue::encode(value)), regs.gpr());
#else
move(Imm32(value.tag()), regs.tagGPR());
move(Imm32(value.payload()), regs.payloadGPR());
#endif
}
void moveTrustedValue(JSValue value, JSValueRegs regs)
{
#if USE(JSVALUE64)
move(TrustedImm64(JSValue::encode(value)), regs.gpr());
#else
move(TrustedImm32(value.tag()), regs.tagGPR());
move(TrustedImm32(value.payload()), regs.payloadGPR());
#endif
}
void storeValue(JSValue value, Address address, JSValueRegs tmpJSR)
{
#if USE(JSVALUE64)
UNUSED_PARAM(tmpJSR);
store64(Imm64(JSValue::encode(value)), address);
#elif USE(JSVALUE32_64)
// Can implement this without the tmpJSR, but using it yields denser code.
moveValue(value, tmpJSR);
storeValue(tmpJSR, address);
#endif
}
#if USE(JSVALUE32_64)
void storeValue(JSValue value, void* address, JSValueRegs tmpJSR)
{
// Can implement this without the tmpJSR, but using it yields denser code.
moveValue(value, tmpJSR);
storeValue(tmpJSR, address);
}
#endif
void storeTrustedValue(JSValue value, Address address)
{
#if USE(JSVALUE64)
store64(TrustedImm64(JSValue::encode(value)), address);
#else
storeAndFence32(TrustedImm32(value.tag()), TrustedImm32(value.payload()), address);
#endif
}
void storeTrustedValue(JSValue value, BaseIndex address)
{
#if USE(JSVALUE64)
store64(TrustedImm64(JSValue::encode(value)), address);
#else
storeAndFence32(TrustedImm32(value.tag()), TrustedImm32(value.payload()), address);
#endif
}
template<typename Op> class Spooler;
class LoadRegSpooler;
class StoreRegSpooler;
class CopySpooler;
Address addressFor(const RegisterAtOffset& entry)
{
return Address(GPRInfo::callFrameRegister, entry.offset());
}
void emitSave(const RegisterAtOffsetList&);
void emitRestore(const RegisterAtOffsetList&, GPRReg = GPRInfo::callFrameRegister);
void emitSaveCalleeSavesFor(const RegisterAtOffsetList* calleeSaves);
enum RestoreTagRegisterMode { UseExistingTagRegisterContents, CopyBaselineCalleeSavedRegistersFromBaseFrame };
void emitSaveOrCopyLLIntBaselineCalleeSavesFor(CodeBlock*, VirtualRegister offsetVirtualRegister, RestoreTagRegisterMode, GPRReg temp1, GPRReg temp2, GPRReg temp3);
void emitRestoreCalleeSavesFor(const RegisterAtOffsetList* calleeSaves);
void emitSaveThenMaterializeTagRegisters()
{
#if USE(JSVALUE64)
#if CPU(ARM64) || CPU(RISCV64)
pushPair(GPRInfo::numberTagRegister, GPRInfo::notCellMaskRegister);
#else
push(GPRInfo::numberTagRegister);
push(GPRInfo::notCellMaskRegister);
#endif
emitMaterializeTagCheckRegisters();
#endif
}
void emitRestoreSavedTagRegisters()
{
#if USE(JSVALUE64)
#if CPU(ARM64) || CPU(RISCV64)
popPair(GPRInfo::numberTagRegister, GPRInfo::notCellMaskRegister);
#else
pop(GPRInfo::notCellMaskRegister);
pop(GPRInfo::numberTagRegister);
#endif
#endif
}
// If you use this, be aware that vmGPR will get trashed.
void copyCalleeSavesToVMEntryFrameCalleeSavesBuffer(GPRReg vmGPR)
{
#if NUMBER_OF_CALLEE_SAVES_REGISTERS > 0
loadPtr(Address(vmGPR, VM::topEntryFrameOffset()), vmGPR);
copyCalleeSavesToEntryFrameCalleeSavesBufferImpl(vmGPR);
#else
UNUSED_PARAM(vmGPR);
#endif
}
void copyCalleeSavesToEntryFrameCalleeSavesBuffer(EntryFrame*& topEntryFrame, GPRReg scratch)
{
#if NUMBER_OF_CALLEE_SAVES_REGISTERS > 0
loadPtr(&topEntryFrame, scratch);
copyCalleeSavesToEntryFrameCalleeSavesBufferImpl(scratch);
#else
UNUSED_PARAM(topEntryFrame);
UNUSED_PARAM(scratch);
#endif
}
void copyCalleeSavesToEntryFrameCalleeSavesBuffer(GPRReg topEntryFrame)
{
#if NUMBER_OF_CALLEE_SAVES_REGISTERS > 0
copyCalleeSavesToEntryFrameCalleeSavesBufferImpl(topEntryFrame);
#else
UNUSED_PARAM(topEntryFrame);
#endif
}
void restoreCalleeSavesFromEntryFrameCalleeSavesBuffer(EntryFrame*&);
void restoreCalleeSavesFromVMEntryFrameCalleeSavesBuffer(GPRReg vmGPR, GPRReg scratchGPR);
void restoreCalleeSavesFromVMEntryFrameCalleeSavesBufferImpl(GPRReg entryFrame, const RegisterSet& skipList);
void copyLLIntBaselineCalleeSavesFromFrameOrRegisterToEntryFrameCalleeSavesBuffer(EntryFrame*&, const RegisterSet& usedRegisters = RegisterSetBuilder::stubUnavailableRegisters());
void emitMaterializeTagCheckRegisters()
{
#if USE(JSVALUE64)
move(MacroAssembler::TrustedImm64(JSValue::NumberTag), GPRInfo::numberTagRegister);
or64(MacroAssembler::TrustedImm32(JSValue::OtherTag), GPRInfo::numberTagRegister, GPRInfo::notCellMaskRegister);
#endif
}
#if CPU(X86_64)
void emitFunctionPrologue()
{
push(framePointerRegister);
move(stackPointerRegister, framePointerRegister);
}
void emitFunctionEpilogueWithEmptyFrame()
{
pop(framePointerRegister);
}
void emitFunctionEpilogue()
{
move(framePointerRegister, stackPointerRegister);
pop(framePointerRegister);
}
void preserveReturnAddressAfterCall(GPRReg reg)
{
pop(reg);
}
void restoreReturnAddressBeforeReturn(GPRReg reg)
{
push(reg);
}
void restoreReturnAddressBeforeReturn(Address address)
{
push(address);
}
// dest = base + index << shift.
void shiftAndAdd(RegisterID base, RegisterID index, uint8_t shift, RegisterID dest, std::optional<RegisterID> optionalScratch = { })
{
ASSERT(shift < 32);
if (shift <= 3) {
x86Lea64(BaseIndex(base, index, static_cast<Scale>(shift)), dest);
return;
}
RegisterID scratch = dest;
bool needToPreserveIndexRegister = false;
if (base == dest) {
scratch = optionalScratch ? optionalScratch.value() : scratchRegister();
if (base == scratch) {
scratch = index;
needToPreserveIndexRegister = true;
} else if (index == scratch)
needToPreserveIndexRegister = true;
if (needToPreserveIndexRegister)
push(index);
}
move(index, scratch);
lshift64(TrustedImm32(shift), scratch);
m_assembler.leaq_mr(0, base, scratch, 0, dest);
if (needToPreserveIndexRegister)
pop(index);
}
#endif // CPU(X86_64)
#if CPU(ARM_THUMB2) || CPU(ARM64)
void emitFunctionPrologue()
{
tagReturnAddress();
pushPair(framePointerRegister, linkRegister);
move(stackPointerRegister, framePointerRegister);
}
void emitFunctionEpilogueWithEmptyFrame()
{
popPair(framePointerRegister, linkRegister);
}
void emitFunctionEpilogue()
{
move(framePointerRegister, stackPointerRegister);
emitFunctionEpilogueWithEmptyFrame();
}
ALWAYS_INLINE void preserveReturnAddressAfterCall(RegisterID reg)
{
move(linkRegister, reg);
}
ALWAYS_INLINE void restoreReturnAddressBeforeReturn(RegisterID reg)
{
move(reg, linkRegister);
}
ALWAYS_INLINE void restoreReturnAddressBeforeReturn(Address address)
{
loadPtr(address, linkRegister);
}
#if CPU(ARM64)
// dest = base + index << shift.
void shiftAndAdd(RegisterID base, RegisterID index, uint8_t shift, RegisterID dest, std::optional<RegisterID> = { })
{
ASSERT(shift < 32);
ASSERT(base != index);
getEffectiveAddress(BaseIndex(base, index, static_cast<Scale>(shift)), dest);
}
#endif // CPU(ARM64)
#endif
#if CPU(RISCV64)
void emitFunctionPrologue()
{
pushPair(framePointerRegister, linkRegister);
move(stackPointerRegister, framePointerRegister);
}
void emitFunctionEpilogueWithEmptyFrame()
{
popPair(framePointerRegister, linkRegister);
}
void emitFunctionEpilogue()
{
move(framePointerRegister, stackPointerRegister);
emitFunctionEpilogueWithEmptyFrame();
}
ALWAYS_INLINE void preserveReturnAddressAfterCall(RegisterID reg)
{
move(linkRegister, reg);
}
ALWAYS_INLINE void restoreReturnAddressBeforeReturn(RegisterID reg)
{
move(reg, linkRegister);
}
ALWAYS_INLINE void restoreReturnAddressBeforeReturn(Address address)
{
loadPtr(address, linkRegister);
}
#endif
void getArityPadding(VM&, unsigned numberOfParameters, GPRReg argumentCountIncludingThisGPR, GPRReg paddingOutputGPR, GPRReg scratchGPR0, GPRReg scratchGPR1, JumpList& stackOverflow);
void emitGetFromCallFrameHeaderPtr(VirtualRegister entry, GPRReg to, GPRReg from = GPRInfo::callFrameRegister)
{
ASSERT(entry.isHeader());
loadPtr(Address(from, entry.offset() * sizeof(Register)), to);
}
void emitPutToCallFrameHeader(GPRReg from, VirtualRegister entry)
{
ASSERT(entry.isHeader());
storePtr(from, Address(GPRInfo::callFrameRegister, entry.offset() * sizeof(Register)));
}
void emitPutToCallFrameHeader(void* value, VirtualRegister entry)
{
ASSERT(entry.isHeader());
storePtr(TrustedImmPtr(value), Address(GPRInfo::callFrameRegister, entry.offset() * sizeof(Register)));
}
void emitPutCellToCallFrameHeader(GPRReg from, VirtualRegister entry)
{
ASSERT(entry.isHeader());
storeCell(from, Address(GPRInfo::callFrameRegister, entry.offset() * sizeof(Register)));
}
void emitZeroToCallFrameHeader(VirtualRegister entry)
{
ASSERT(entry.isHeader());
storePtr(TrustedImmPtr(nullptr), Address(GPRInfo::callFrameRegister, entry.offset() * sizeof(Register)));
}
JumpList branchIfNotEqual(JSValueRegs regs, JSValue value)
{
#if USE(JSVALUE64)
return branch64(NotEqual, regs.gpr(), TrustedImm64(JSValue::encode(value)));
#else
JumpList result;
result.append(branch32(NotEqual, regs.tagGPR(), TrustedImm32(value.tag())));
if (value.isEmpty() || value.isUndefinedOrNull())
return result; // These don't have anything interesting in the payload.
result.append(branch32(NotEqual, regs.payloadGPR(), TrustedImm32(value.payload())));
return result;
#endif
}
Jump branchIfEqual(JSValueRegs regs, JSValue value)
{
#if USE(JSVALUE64)
return branch64(Equal, regs.gpr(), TrustedImm64(JSValue::encode(value)));
#else
Jump notEqual;
// These don't have anything interesting in the payload.
if (!value.isEmpty() && !value.isUndefinedOrNull())
notEqual = branch32(NotEqual, regs.payloadGPR(), TrustedImm32(value.payload()));
Jump result = branch32(Equal, regs.tagGPR(), TrustedImm32(value.tag()));
if (notEqual.isSet())
notEqual.link(this);
return result;
#endif
}
template<typename T>
Jump branchIfNotCell(T maybeCell, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
if (mode == HaveTagRegisters)
return branchTest64(NonZero, maybeCell, GPRInfo::notCellMaskRegister);
return branchTest64(NonZero, maybeCell, TrustedImm64(JSValue::NotCellMask));
#else
UNUSED_PARAM(mode);
return branch32(MacroAssembler::NotEqual, maybeCell, TrustedImm32(JSValue::CellTag));
#endif
}
Jump branchIfNotCell(JSValueRegs regs, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
return branchIfNotCell(regs.gpr(), mode);
#else
return branchIfNotCell(regs.tagGPR(), mode);
#endif
}
template<typename T>
Jump branchIfCell(T maybeCell, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
if (mode == HaveTagRegisters)
return branchTest64(Zero, maybeCell, GPRInfo::notCellMaskRegister);
return branchTest64(Zero, maybeCell, TrustedImm64(JSValue::NotCellMask));
#else
UNUSED_PARAM(mode);
return branch32(MacroAssembler::Equal, maybeCell, TrustedImm32(JSValue::CellTag));
#endif
}
Jump branchIfCell(JSValueRegs regs, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
return branchIfCell(regs.gpr(), mode);
#else
return branchIfCell(regs.tagGPR(), mode);
#endif
}
Jump branchIfOther(JSValueRegs regs, GPRReg tempGPR)
{
#if USE(JSVALUE64)
move(regs.gpr(), tempGPR);
and64(TrustedImm32(~JSValue::UndefinedTag), tempGPR);
return branch64(Equal, tempGPR, TrustedImm64(JSValue::ValueNull));
#else
or32(TrustedImm32(1), regs.tagGPR(), tempGPR);
return branch32(Equal, tempGPR, TrustedImm32(JSValue::NullTag));
#endif
}
Jump branchIfNotOther(JSValueRegs regs, GPRReg tempGPR)
{
#if USE(JSVALUE64)
move(regs.gpr(), tempGPR);
and64(TrustedImm32(~JSValue::UndefinedTag), tempGPR);
return branch64(NotEqual, tempGPR, TrustedImm64(JSValue::ValueNull));
#else
or32(TrustedImm32(1), regs.tagGPR(), tempGPR);
return branch32(NotEqual, tempGPR, TrustedImm32(JSValue::NullTag));
#endif
}
Jump branchIfInt32(GPRReg gpr, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
if (mode == HaveTagRegisters)
return branch64(AboveOrEqual, gpr, GPRInfo::numberTagRegister);
return branch64(AboveOrEqual, gpr, TrustedImm64(JSValue::NumberTag));
#else
UNUSED_PARAM(mode);
return branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
#endif
}
Jump branchIfInt32(JSValueRegs regs, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
return branchIfInt32(regs.gpr(), mode);
#else
return branchIfInt32(regs.tagGPR(), mode);
#endif
}
Jump branchIfNotInt32(GPRReg gpr, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
if (mode == HaveTagRegisters)
return branch64(Below, gpr, GPRInfo::numberTagRegister);
return branch64(Below, gpr, TrustedImm64(JSValue::NumberTag));
#else
UNUSED_PARAM(mode);
return branch32(NotEqual, gpr, TrustedImm32(JSValue::Int32Tag));
#endif
}
Jump branchIfNotInt32(JSValueRegs regs, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
return branchIfNotInt32(regs.gpr(), mode);
#else
return branchIfNotInt32(regs.tagGPR(), mode);
#endif
}
// Note that the tempGPR is not used in 64-bit mode.
Jump branchIfNumber(JSValueRegs regs, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
UNUSED_PARAM(tempGPR);
return branchIfNumber(regs.gpr(), mode);
#else
UNUSED_PARAM(mode);
ASSERT(tempGPR != InvalidGPRReg);
add32(TrustedImm32(1), regs.tagGPR(), tempGPR);
return branch32(Below, tempGPR, TrustedImm32(JSValue::LowestTag + 1));
#endif
}
#if USE(JSVALUE64)
Jump branchIfNumber(GPRReg gpr, TagRegistersMode mode = HaveTagRegisters)
{
if (mode == HaveTagRegisters)
return branchTest64(NonZero, gpr, GPRInfo::numberTagRegister);
return branchTest64(NonZero, gpr, TrustedImm64(JSValue::NumberTag));
}
#endif
// Note that the tempGPR is not used in 64-bit mode.
Jump branchIfNotNumber(JSValueRegs regs, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
UNUSED_PARAM(tempGPR);
return branchIfNotNumber(regs.gpr(), mode);
#else
UNUSED_PARAM(mode);
add32(TrustedImm32(1), regs.tagGPR(), tempGPR);
return branch32(AboveOrEqual, tempGPR, TrustedImm32(JSValue::LowestTag + 1));
#endif
}
#if USE(JSVALUE64)
Jump branchIfNotNumber(GPRReg gpr, TagRegistersMode mode = HaveTagRegisters)
{
if (mode == HaveTagRegisters)
return branchTest64(Zero, gpr, GPRInfo::numberTagRegister);
return branchTest64(Zero, gpr, TrustedImm64(JSValue::NumberTag));
}
#endif
Jump branchIfNotDoubleKnownNotInt32(JSValueRegs regs, TagRegistersMode mode = HaveTagRegisters)
{
#if USE(JSVALUE64)
if (mode == HaveTagRegisters)
return branchTest64(Zero, regs.gpr(), GPRInfo::numberTagRegister);
return branchTest64(Zero, regs.gpr(), TrustedImm64(JSValue::NumberTag));
#else
UNUSED_PARAM(mode);
return branch32(AboveOrEqual, regs.tagGPR(), TrustedImm32(JSValue::LowestTag));
#endif
}
// Note that the tempGPR is not used in 32-bit mode.
Jump branchIfBoolean(GPRReg gpr, GPRReg tempGPR)
{
#if USE(JSVALUE64)
ASSERT(tempGPR != InvalidGPRReg);
xor64(TrustedImm32(JSValue::ValueFalse), gpr, tempGPR);
return branchTest64(Zero, tempGPR, TrustedImm32(static_cast<int32_t>(~1)));
#else
UNUSED_PARAM(tempGPR);
return branch32(Equal, gpr, TrustedImm32(JSValue::BooleanTag));
#endif
}
// Note that the tempGPR is not used in 32-bit mode.
Jump branchIfBoolean(JSValueRegs regs, GPRReg tempGPR)
{
#if USE(JSVALUE64)
return branchIfBoolean(regs.gpr(), tempGPR);
#else
return branchIfBoolean(regs.tagGPR(), tempGPR);
#endif
}
// Note that the tempGPR is not used in 32-bit mode.
Jump branchIfNotBoolean(GPRReg gpr, GPRReg tempGPR)
{
#if USE(JSVALUE64)
ASSERT(tempGPR != InvalidGPRReg);
xor64(TrustedImm32(JSValue::ValueFalse), gpr, tempGPR);
return branchTest64(NonZero, tempGPR, TrustedImm32(static_cast<int32_t>(~1)));
#else
UNUSED_PARAM(tempGPR);
return branch32(NotEqual, gpr, TrustedImm32(JSValue::BooleanTag));
#endif
}
// Note that the tempGPR is not used in 32-bit mode.
Jump branchIfNotBoolean(JSValueRegs regs, GPRReg tempGPR)
{
#if USE(JSVALUE64)
return branchIfNotBoolean(regs.gpr(), tempGPR);
#else
return branchIfNotBoolean(regs.tagGPR(), tempGPR);
#endif
}
#if USE(BIGINT32)
Jump branchIfBigInt32(GPRReg gpr, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
ASSERT(tempGPR != InvalidGPRReg);
if (mode == HaveTagRegisters && gpr != tempGPR) {
static_assert(JSValue::BigInt32Mask == JSValue::NumberTag + JSValue::BigInt32Tag);
add64(TrustedImm32(JSValue::BigInt32Tag), GPRInfo::numberTagRegister, tempGPR);
and64(gpr, tempGPR);
return branch64(Equal, tempGPR, TrustedImm32(JSValue::BigInt32Tag));
}
move(gpr, tempGPR);
and64(TrustedImm64(JSValue::BigInt32Mask), tempGPR);
return branch64(Equal, tempGPR, TrustedImm32(JSValue::BigInt32Tag));
}
Jump branchIfNotBigInt32(GPRReg gpr, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
ASSERT(tempGPR != InvalidGPRReg);
if (mode == HaveTagRegisters && gpr != tempGPR) {
static_assert(JSValue::BigInt32Mask == JSValue::NumberTag + JSValue::BigInt32Tag);
add64(TrustedImm32(JSValue::BigInt32Tag), GPRInfo::numberTagRegister, tempGPR);
and64(gpr, tempGPR);
return branch64(NotEqual, tempGPR, TrustedImm32(JSValue::BigInt32Tag));
}
move(gpr, tempGPR);
and64(TrustedImm64(JSValue::BigInt32Mask), tempGPR);
return branch64(NotEqual, tempGPR, TrustedImm32(JSValue::BigInt32Tag));
}
Jump branchIfBigInt32(JSValueRegs regs, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
return branchIfBigInt32(regs.gpr(), tempGPR, mode);
}
Jump branchIfNotBigInt32(JSValueRegs regs, GPRReg tempGPR, TagRegistersMode mode = HaveTagRegisters)
{
return branchIfNotBigInt32(regs.gpr(), tempGPR, mode);
}
#endif // USE(BIGINT32)
// FIXME: rename these to make it clear that they require their input to be a cell.
Jump branchIfObject(GPRReg cellGPR)
{
return branch8(
AboveOrEqual, Address(cellGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(ObjectType));
}
Jump branchIfNotObject(GPRReg cellGPR)
{
return branch8(
Below, Address(cellGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(ObjectType));
}
// Note that first and last are inclusive.
Jump branchIfType(GPRReg cellGPR, JSTypeRange range)
{
if (range.last == range.first)
return branch8(Equal, Address(cellGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(range.first));
ASSERT(range.last > range.first);
GPRReg scratch = scratchRegister();
load8(Address(cellGPR, JSCell::typeInfoTypeOffset()), scratch);
sub32(TrustedImm32(range.first), scratch);
return branch32(BelowOrEqual, scratch, TrustedImm32(range.last - range.first));
}
Jump branchIfType(GPRReg cellGPR, JSType type)
{
return branchIfType(cellGPR, JSTypeRange { type, type });
}
Jump branchIfNotType(GPRReg cellGPR, JSTypeRange range)
{
if (range.last == range.first)
return branch8(NotEqual, Address(cellGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(range.first));
ASSERT(range.last > range.first);
GPRReg scratch = scratchRegister();
load8(Address(cellGPR, JSCell::typeInfoTypeOffset()), scratch);
sub32(TrustedImm32(range.first), scratch);
return branch32(Above, scratch, TrustedImm32(range.last - range.first));
}
Jump branchIfNotType(GPRReg cellGPR, JSType type)
{
return branchIfNotType(cellGPR, JSTypeRange { type, type });
}
// FIXME: rename these to make it clear that they require their input to be a cell.
Jump branchIfString(GPRReg cellGPR) { return branchIfType(cellGPR, StringType); }
Jump branchIfNotString(GPRReg cellGPR) { return branchIfNotType(cellGPR, StringType); }
Jump branchIfSymbol(GPRReg cellGPR) { return branchIfType(cellGPR, SymbolType); }
Jump branchIfNotSymbol(GPRReg cellGPR) { return branchIfNotType(cellGPR, SymbolType); }
Jump branchIfHeapBigInt(GPRReg cellGPR) { return branchIfType(cellGPR, HeapBigIntType); }
Jump branchIfNotHeapBigInt(GPRReg cellGPR) { return branchIfNotType(cellGPR, HeapBigIntType); }
Jump branchIfFunction(GPRReg cellGPR) { return branchIfType(cellGPR, JSFunctionType); }
Jump branchIfNotFunction(GPRReg cellGPR) { return branchIfNotType(cellGPR, JSFunctionType); }
Jump branchIfStructure(GPRReg cellGPR) { return branchIfType(cellGPR, StructureType); }
Jump branchIfNotStructure(GPRReg cellGPR) { return branchIfNotType(cellGPR, StructureType); }
void isEmpty(GPRReg gpr, GPRReg dst)
{
#if USE(JSVALUE64)
test64(Zero, gpr, gpr, dst);
#else
compare32(Equal, gpr, TrustedImm32(JSValue::EmptyValueTag), dst);
#endif
}
#if USE(JSVALUE64)
void toBigInt64(GPRReg cellGPR, GPRReg destGPR, GPRReg scratchGPR, GPRReg scratch2GPR)
{
ASSERT(noOverlap(cellGPR, destGPR, scratchGPR, scratch2GPR));
load32(Address(cellGPR, JSBigInt::offsetOfLength()), destGPR);