Source/JavaScriptCore/assembler/MacroAssemblerARM64E.h - WebKit - Git at Google

 /*
  * Copyright (C) 2018-2021 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(ASSEMBLER) && CPU(ARM64E)

 #include "DisallowMacroScratchRegisterUsage.h"
 #include <wtf/MathExtras.h>

 // We need to include this before MacroAssemblerARM64.h because MacroAssemblerARM64
 // will be defined in terms of ARM64EAssembler for ARM64E.
 #include "ARM64EAssembler.h"
 #include "JITOperationValidation.h"
 #include "JSCPtrTag.h"
 #include "MacroAssemblerARM64.h"

 #if OS(DARWIN)
 #include <mach/vm_param.h>
 #endif

 namespace JSC {

 using Assembler = TARGET_ASSEMBLER;

 class MacroAssemblerARM64E : public MacroAssemblerARM64 {
 public:
     static constexpr unsigned numberOfPointerBits = sizeof(void*) * CHAR_BIT;
     static constexpr unsigned maxNumberOfAllowedPACBits = numberOfPointerBits - OS_CONSTANT(EFFECTIVE_ADDRESS_WIDTH);
     static constexpr uintptr_t nonPACBitsMask = (1ull << (numberOfPointerBits - maxNumberOfAllowedPACBits)) - 1;

     ALWAYS_INLINE void tagReturnAddress()
     {
         tagPtr(ARM64Registers::sp, ARM64Registers::lr);
     }

     ALWAYS_INLINE void untagReturnAddress(RegisterID scratch = InvalidGPR)
     {
         untagPtr(ARM64Registers::sp, ARM64Registers::lr);
         validateUntaggedPtr(ARM64Registers::lr, scratch);
     }

     ALWAYS_INLINE void tagPtr(PtrTag tag, RegisterID target)
     {
         auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
         move(TrustedImm64(tag), tagGPR);
         m_assembler.pacib(target, tagGPR);
     }

     ALWAYS_INLINE void tagPtr(RegisterID tag, RegisterID target)
     {
         if (target == ARM64Registers::lr && tag == ARM64Registers::sp) {
             m_assembler.pacibsp();
             return;
         }
         m_assembler.pacib(target, tag);
     }

     ALWAYS_INLINE void untagPtr(PtrTag tag, RegisterID target)
     {
         auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
         move(TrustedImm64(tag), tagGPR);
         m_assembler.autib(target, tagGPR);
     }

     ALWAYS_INLINE void validateUntaggedPtr(RegisterID target, RegisterID scratch = InvalidGPR)
     {
         if (scratch == InvalidGPR)
             scratch = getCachedDataTempRegisterIDAndInvalidate();

         DisallowMacroScratchRegisterUsage disallowScope(*this);
         ASSERT(target != scratch);
         rshift64(target, TrustedImm32(8), scratch);
         and64(TrustedImm64(0xff000000000000), scratch, scratch);
         or64(target, scratch, scratch);
         load8(Address(scratch), scratch);
     }

     ALWAYS_INLINE void untagPtr(RegisterID tag, RegisterID target)
     {
         m_assembler.autib(target, tag);
     }

     ALWAYS_INLINE void removePtrTag(RegisterID target)
     {
         m_assembler.xpaci(target);
     }

     ALWAYS_INLINE void tagArrayPtr(RegisterID length, RegisterID target)
     {
         m_assembler.pacdb(target, length);
     }

     ALWAYS_INLINE void untagArrayPtr(RegisterID length, RegisterID target, bool validateAuth, RegisterID scratch)
     {
         if (validateAuth) {
             ASSERT(scratch != InvalidGPRReg);
             move(target, scratch);
         }

         m_assembler.autdb(target, length);

         if (validateAuth) {
             ASSERT(target != ARM64Registers::sp);
             ASSERT(scratch != ARM64Registers::sp);
             removeArrayPtrTag(scratch);
             auto isValidPtr = branch64(Equal, scratch, target);
             breakpoint(0xc473);
             isValidPtr.link(this);
         }
     }

     ALWAYS_INLINE void untagArrayPtrLength32(Address length, RegisterID target, bool validateAuth)
     {
         auto lengthGPR = getCachedDataTempRegisterIDAndInvalidate();
         load32(length, lengthGPR);
         auto scratch = validateAuth ? getCachedMemoryTempRegisterIDAndInvalidate() : InvalidGPRReg;
         untagArrayPtr(lengthGPR, target, validateAuth, scratch);
     }

     ALWAYS_INLINE void removeArrayPtrTag(RegisterID target)
     {
         // If we couldn't fit this into a single instruction, we'd be better
         // off emitting two shifts to mask off the top bits.
         ASSERT(LogicalImmediate::create64(nonPACBitsMask).isValid());
         and64(TrustedImmPtr(nonPACBitsMask), target);
     }

     static constexpr RegisterID InvalidGPR  = static_cast<RegisterID>(-1);

     enum class CallSignatureType {
         JITCall,
         NativeCall,
     };

     enum class JumpSignatureType {
         JITJump,
         NativeJump,
     };

     template<CallSignatureType type>
     ALWAYS_INLINE Call callTrustedPtr(RegisterID tagGPR = InvalidGPR)
     {
         UNUSED_PARAM(type);
         ASSERT(tagGPR != dataTempRegister);
         AssemblerLabel pointerLabel = m_assembler.label();
         moveWithFixedWidth(TrustedImmPtr(nullptr), getCachedDataTempRegisterIDAndInvalidate());
         invalidateAllTempRegisters();
 #if ENABLE(JIT_CAGE)
         if (Options::useJITCage()) {
             JSC_JIT_CAGED_CALL(type, dataTempRegister, tagGPR);
         } else
 #endif
             m_assembler.blrab(dataTempRegister, tagGPR);
         AssemblerLabel callLabel = m_assembler.label();
         ASSERT_UNUSED(pointerLabel, ARM64Assembler::getDifferenceBetweenLabels(callLabel, pointerLabel) == REPATCH_OFFSET_CALL_TO_POINTER);
         return Call(callLabel, Call::Linkable);
     }

     ALWAYS_INLINE Call call(PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         move(TrustedImm64(tag), ARM64Registers::lr);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             return callTrustedPtr<CallSignatureType::JITCall>(ARM64Registers::lr);
         return callTrustedPtr<CallSignatureType::NativeCall>(ARM64Registers::lr);
     }

     ALWAYS_INLINE Call call(RegisterID tagGPR)
     {
         return callTrustedPtr<CallSignatureType::NativeCall>(tagGPR);
     }

     template<CallSignatureType type>
     ALWAYS_INLINE Call callRegister(RegisterID targetGPR, RegisterID tagGPR = InvalidGPR)
     {
         UNUSED_PARAM(type);
         ASSERT(tagGPR != targetGPR);
         invalidateAllTempRegisters();
 #if ENABLE(JIT_CAGE)
         if (Options::useJITCage()) {
             JSC_JIT_CAGED_CALL(type, targetGPR, tagGPR);
         } else
 #endif
             m_assembler.blrab(targetGPR, tagGPR);
         return Call(m_assembler.label(), Call::None);
     }

     ALWAYS_INLINE Call call(RegisterID targetGPR, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         move(TrustedImm64(tag), ARM64Registers::lr);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             return callRegister<CallSignatureType::JITCall>(targetGPR, ARM64Registers::lr);
         return callRegister<CallSignatureType::NativeCall>(targetGPR, ARM64Registers::lr);
     }

     ALWAYS_INLINE Call call(RegisterID targetGPR, RegisterID tagGPR)
     {
         return callRegister<CallSignatureType::NativeCall>(targetGPR, tagGPR);
     }

     ALWAYS_INLINE void call(Address address, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         load64(address, getCachedDataTempRegisterIDAndInvalidate());
         call(dataTempRegister, tag);
     }

     ALWAYS_INLINE void call(Address address, RegisterID tag)
     {
         ASSERT(tag != dataTempRegister);
         load64(address, getCachedDataTempRegisterIDAndInvalidate());
         call(dataTempRegister, tag);
     }

     ALWAYS_INLINE void callOperation(const FunctionPtr<OperationPtrTag> operation)
     {
         auto tmp = getCachedDataTempRegisterIDAndInvalidate();
         move(TrustedImmPtr(operation.executableAddress()), tmp);
         call(tmp, OperationPtrTag);
     }

     ALWAYS_INLINE Jump jump() { return MacroAssemblerARM64::jump(); }

     template<JumpSignatureType type>
     ALWAYS_INLINE void farJumpRegister(RegisterID targetGPR, RegisterID tagGPR = InvalidGPR)
     {
         UNUSED_PARAM(type);
         ASSERT(tagGPR != targetGPR);
 #if ENABLE(JIT_CAGE)
         if (Options::useJITCage()) {
             JSC_JIT_CAGED_FAR_JUMP(type, targetGPR, tagGPR);
         } else
 #endif
             m_assembler.brab(targetGPR, tagGPR);
     }

     void farJump(RegisterID targetGPR, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);

         ASSERT(tag != CFunctionPtrTag);
         RegisterID diversityGPR = getCachedDataTempRegisterIDAndInvalidate();
         move(TrustedImm64(tag), diversityGPR);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
         else
             farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
     }

     void farJump(TrustedImmPtr target, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
         move(target, targetGPR);
         move(TrustedImm64(tag), diversityGPR);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
         else
             farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
     }

     void farJump(RegisterID targetGPR, RegisterID tagGPR)
     {
         ASSERT(tagGPR != targetGPR);
         farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
     }

     void farJump(Address address, RegisterID tagGPR)
     {
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         ASSERT(tagGPR != targetGPR);
         load64(address, targetGPR);
         farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
     }

     void farJump(BaseIndex address, RegisterID tagGPR)
     {
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         ASSERT(tagGPR != targetGPR);
         load64(address, targetGPR);
         farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
     }

     void farJump(AbsoluteAddress address, RegisterID tagGPR)
     {
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         ASSERT(tagGPR != targetGPR);
         move(TrustedImmPtr(address.m_ptr), targetGPR);
         load64(Address(targetGPR), targetGPR);
         farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
     }

     void farJump(Address address, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
         load64(address, targetGPR);
         move(TrustedImm64(tag), diversityGPR);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
         else
             farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
     }

     void farJump(BaseIndex address, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
         load64(address, targetGPR);
         move(TrustedImm64(tag), diversityGPR);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
         else
             farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
     }

     void farJump(AbsoluteAddress address, PtrTag tag)
     {
         ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
         ASSERT(!Options::useJITCage() || callerType(tag) == PtrTagCallerType::JIT);
         RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
         RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
         move(TrustedImmPtr(address.m_ptr), targetGPR);
         load64(Address(targetGPR), targetGPR);
         move(TrustedImm64(tag), diversityGPR);
         if (calleeType(tag) == PtrTagCalleeType::JIT)
             farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
         else
             farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
     }

     ALWAYS_INLINE void ret()
     {
 #if ENABLE(JIT_CAGE)
         if (Options::useJITCage()) {
             JSC_JIT_CAGED_RET();
         } else
 #endif
             m_assembler.retab();
     }

     void atomicXchgAdd8(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldaddal<8>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgAdd16(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldaddal<16>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgAdd32(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldaddal<32>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgAdd64(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldaddal<64>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgXor8(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldeoral<8>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgXor16(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldeoral<16>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgXor32(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldeoral<32>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgXor64(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldeoral<64>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgOr8(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldsetal<8>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgOr16(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldsetal<16>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgOr32(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldsetal<32>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgOr64(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldsetal<64>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgClear8(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldclral<8>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgClear16(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldclral<16>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgClear32(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldclral<32>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchgClear64(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.ldclral<64>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchg8(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.swpal<8>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchg16(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.swpal<16>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchg32(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.swpal<32>(src, dest, extractSimpleAddress(address));
     }

     void atomicXchg64(RegisterID src, Address address, RegisterID dest)
     {
         m_assembler.swpal<64>(src, dest, extractSimpleAddress(address));
     }

     void atomicStrongCAS8(RegisterID expectedAndResult, RegisterID newValue, Address address)
     {
         m_assembler.casal<8>(expectedAndResult, newValue, extractSimpleAddress(address));
     }

     void atomicStrongCAS16(RegisterID expectedAndResult, RegisterID newValue, Address address)
     {
         m_assembler.casal<16>(expectedAndResult, newValue, extractSimpleAddress(address));
     }

     void atomicStrongCAS32(RegisterID expectedAndResult, RegisterID newValue, Address address)
     {
         m_assembler.casal<32>(expectedAndResult, newValue, extractSimpleAddress(address));
     }

     void atomicStrongCAS64(RegisterID expectedAndResult, RegisterID newValue, Address address)
     {
         m_assembler.casal<64>(expectedAndResult, newValue, extractSimpleAddress(address));
     }
 };

 } // namespace JSC

 #endif // ENABLE(ASSEMBLER) && CPU(ARM64E)
	/*
	* Copyright (C) 2018-2021 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(ASSEMBLER) && CPU(ARM64E)

	#include "DisallowMacroScratchRegisterUsage.h"
	#include <wtf/MathExtras.h>

	// We need to include this before MacroAssemblerARM64.h because MacroAssemblerARM64
	// will be defined in terms of ARM64EAssembler for ARM64E.
	#include "ARM64EAssembler.h"
	#include "JITOperationValidation.h"
	#include "JSCPtrTag.h"
	#include "MacroAssemblerARM64.h"

	#if OS(DARWIN)
	#include <mach/vm_param.h>
	#endif

	namespace JSC {

	using Assembler = TARGET_ASSEMBLER;

	class MacroAssemblerARM64E : public MacroAssemblerARM64 {
	public:
	static constexpr unsigned numberOfPointerBits = sizeof(void) CHAR_BIT;
	static constexpr unsigned maxNumberOfAllowedPACBits = numberOfPointerBits - OS_CONSTANT(EFFECTIVE_ADDRESS_WIDTH);
	static constexpr uintptr_t nonPACBitsMask = (1ull << (numberOfPointerBits - maxNumberOfAllowedPACBits)) - 1;

	ALWAYS_INLINE void tagReturnAddress()
	{
	tagPtr(ARM64Registers::sp, ARM64Registers::lr);
	}

	ALWAYS_INLINE void untagReturnAddress(RegisterID scratch = InvalidGPR)
	{
	untagPtr(ARM64Registers::sp, ARM64Registers::lr);
	validateUntaggedPtr(ARM64Registers::lr, scratch);
	}

	ALWAYS_INLINE void tagPtr(PtrTag tag, RegisterID target)
	{
	auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
	move(TrustedImm64(tag), tagGPR);
	m_assembler.pacib(target, tagGPR);
	}

	ALWAYS_INLINE void tagPtr(RegisterID tag, RegisterID target)
	{
	if (target == ARM64Registers::lr && tag == ARM64Registers::sp) {
	m_assembler.pacibsp();
	return;
	}
	m_assembler.pacib(target, tag);
	}

	ALWAYS_INLINE void untagPtr(PtrTag tag, RegisterID target)
	{
	auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
	move(TrustedImm64(tag), tagGPR);
	m_assembler.autib(target, tagGPR);
	}

	ALWAYS_INLINE void validateUntaggedPtr(RegisterID target, RegisterID scratch = InvalidGPR)
	{
	if (scratch == InvalidGPR)
	scratch = getCachedDataTempRegisterIDAndInvalidate();

	DisallowMacroScratchRegisterUsage disallowScope(*this);
	ASSERT(target != scratch);
	rshift64(target, TrustedImm32(8), scratch);
	and64(TrustedImm64(0xff000000000000), scratch, scratch);
	or64(target, scratch, scratch);
	load8(Address(scratch), scratch);
	}

	ALWAYS_INLINE void untagPtr(RegisterID tag, RegisterID target)
	{
	m_assembler.autib(target, tag);
	}

	ALWAYS_INLINE void removePtrTag(RegisterID target)
	{
	m_assembler.xpaci(target);
	}

	ALWAYS_INLINE void tagArrayPtr(RegisterID length, RegisterID target)
	{
	m_assembler.pacdb(target, length);
	}

	ALWAYS_INLINE void untagArrayPtr(RegisterID length, RegisterID target, bool validateAuth, RegisterID scratch)
	{
	if (validateAuth) {
	ASSERT(scratch != InvalidGPRReg);
	move(target, scratch);
	}

	m_assembler.autdb(target, length);

	if (validateAuth) {
	ASSERT(target != ARM64Registers::sp);
	ASSERT(scratch != ARM64Registers::sp);
	removeArrayPtrTag(scratch);
	auto isValidPtr = branch64(Equal, scratch, target);
	breakpoint(0xc473);
	isValidPtr.link(this);
	}
	}

	ALWAYS_INLINE void untagArrayPtrLength32(Address length, RegisterID target, bool validateAuth)
	{
	auto lengthGPR = getCachedDataTempRegisterIDAndInvalidate();
	load32(length, lengthGPR);
	auto scratch = validateAuth ? getCachedMemoryTempRegisterIDAndInvalidate() : InvalidGPRReg;
	untagArrayPtr(lengthGPR, target, validateAuth, scratch);
	}

	ALWAYS_INLINE void removeArrayPtrTag(RegisterID target)
	{
	// If we couldn't fit this into a single instruction, we'd be better
	// off emitting two shifts to mask off the top bits.
	ASSERT(LogicalImmediate::create64(nonPACBitsMask).isValid());
	and64(TrustedImmPtr(nonPACBitsMask), target);
	}

	static constexpr RegisterID InvalidGPR = static_cast<RegisterID>(-1);

	enum class CallSignatureType {
	JITCall,
	NativeCall,
	};

	enum class JumpSignatureType {
	JITJump,
	NativeJump,
	};

	template<CallSignatureType type>
	ALWAYS_INLINE Call callTrustedPtr(RegisterID tagGPR = InvalidGPR)
	{
	UNUSED_PARAM(type);
	ASSERT(tagGPR != dataTempRegister);
	AssemblerLabel pointerLabel = m_assembler.label();
	moveWithFixedWidth(TrustedImmPtr(nullptr), getCachedDataTempRegisterIDAndInvalidate());
	invalidateAllTempRegisters();
	#if ENABLE(JIT_CAGE)
	if (Options::useJITCage()) {
	JSC_JIT_CAGED_CALL(type, dataTempRegister, tagGPR);
	} else
	#endif
	m_assembler.blrab(dataTempRegister, tagGPR);
	AssemblerLabel callLabel = m_assembler.label();
	ASSERT_UNUSED(pointerLabel, ARM64Assembler::getDifferenceBetweenLabels(callLabel, pointerLabel) == REPATCH_OFFSET_CALL_TO_POINTER);
	return Call(callLabel, Call::Linkable);
	}

	ALWAYS_INLINE Call call(PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	move(TrustedImm64(tag), ARM64Registers::lr);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	return callTrustedPtr<CallSignatureType::JITCall>(ARM64Registers::lr);
	return callTrustedPtr<CallSignatureType::NativeCall>(ARM64Registers::lr);
	}

	ALWAYS_INLINE Call call(RegisterID tagGPR)
	{
	return callTrustedPtr<CallSignatureType::NativeCall>(tagGPR);
	}

	template<CallSignatureType type>
	ALWAYS_INLINE Call callRegister(RegisterID targetGPR, RegisterID tagGPR = InvalidGPR)
	{
	UNUSED_PARAM(type);
	ASSERT(tagGPR != targetGPR);
	invalidateAllTempRegisters();
	#if ENABLE(JIT_CAGE)
	if (Options::useJITCage()) {
	JSC_JIT_CAGED_CALL(type, targetGPR, tagGPR);
	} else
	#endif
	m_assembler.blrab(targetGPR, tagGPR);
	return Call(m_assembler.label(), Call::None);
	}

	ALWAYS_INLINE Call call(RegisterID targetGPR, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	move(TrustedImm64(tag), ARM64Registers::lr);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	return callRegister<CallSignatureType::JITCall>(targetGPR, ARM64Registers::lr);
	return callRegister<CallSignatureType::NativeCall>(targetGPR, ARM64Registers::lr);
	}

	ALWAYS_INLINE Call call(RegisterID targetGPR, RegisterID tagGPR)
	{
	return callRegister<CallSignatureType::NativeCall>(targetGPR, tagGPR);
	}

	ALWAYS_INLINE void call(Address address, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	load64(address, getCachedDataTempRegisterIDAndInvalidate());
	call(dataTempRegister, tag);
	}

	ALWAYS_INLINE void call(Address address, RegisterID tag)
	{
	ASSERT(tag != dataTempRegister);
	load64(address, getCachedDataTempRegisterIDAndInvalidate());
	call(dataTempRegister, tag);
	}

	ALWAYS_INLINE void callOperation(const FunctionPtr<OperationPtrTag> operation)
	{
	auto tmp = getCachedDataTempRegisterIDAndInvalidate();
	move(TrustedImmPtr(operation.executableAddress()), tmp);
	call(tmp, OperationPtrTag);
	}

	ALWAYS_INLINE Jump jump() { return MacroAssemblerARM64::jump(); }

	template<JumpSignatureType type>
	ALWAYS_INLINE void farJumpRegister(RegisterID targetGPR, RegisterID tagGPR = InvalidGPR)
	{
	UNUSED_PARAM(type);
	ASSERT(tagGPR != targetGPR);
	#if ENABLE(JIT_CAGE)
	if (Options::useJITCage()) {
	JSC_JIT_CAGED_FAR_JUMP(type, targetGPR, tagGPR);
	} else
	#endif
	m_assembler.brab(targetGPR, tagGPR);
	}

	void farJump(RegisterID targetGPR, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);

	ASSERT(tag != CFunctionPtrTag);
	RegisterID diversityGPR = getCachedDataTempRegisterIDAndInvalidate();
	move(TrustedImm64(tag), diversityGPR);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
	else
	farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
	}

	void farJump(TrustedImmPtr target, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
	move(target, targetGPR);
	move(TrustedImm64(tag), diversityGPR);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
	else
	farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
	}

	void farJump(RegisterID targetGPR, RegisterID tagGPR)
	{
	ASSERT(tagGPR != targetGPR);
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
	}

	void farJump(Address address, RegisterID tagGPR)
	{
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	ASSERT(tagGPR != targetGPR);
	load64(address, targetGPR);
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
	}

	void farJump(BaseIndex address, RegisterID tagGPR)
	{
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	ASSERT(tagGPR != targetGPR);
	load64(address, targetGPR);
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
	}

	void farJump(AbsoluteAddress address, RegisterID tagGPR)
	{
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	ASSERT(tagGPR != targetGPR);
	move(TrustedImmPtr(address.m_ptr), targetGPR);
	load64(Address(targetGPR), targetGPR);
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, tagGPR);
	}

	void farJump(Address address, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
	load64(address, targetGPR);
	move(TrustedImm64(tag), diversityGPR);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
	else
	farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
	}

	void farJump(BaseIndex address, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
	load64(address, targetGPR);
	move(TrustedImm64(tag), diversityGPR);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
	else
	farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
	}

	void farJump(AbsoluteAddress address, PtrTag tag)
	{
	ASSERT(tag != CFunctionPtrTag && tag != NoPtrTag);
	ASSERT(!Options::useJITCage() \|\| callerType(tag) == PtrTagCallerType::JIT);
	RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
	RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
	move(TrustedImmPtr(address.m_ptr), targetGPR);
	load64(Address(targetGPR), targetGPR);
	move(TrustedImm64(tag), diversityGPR);
	if (calleeType(tag) == PtrTagCalleeType::JIT)
	farJumpRegister<JumpSignatureType::JITJump>(targetGPR, diversityGPR);
	else
	farJumpRegister<JumpSignatureType::NativeJump>(targetGPR, diversityGPR);
	}

	ALWAYS_INLINE void ret()
	{
	#if ENABLE(JIT_CAGE)
	if (Options::useJITCage()) {
	JSC_JIT_CAGED_RET();
	} else
	#endif
	m_assembler.retab();
	}

	void atomicXchgAdd8(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldaddal<8>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgAdd16(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldaddal<16>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgAdd32(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldaddal<32>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgAdd64(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldaddal<64>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgXor8(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldeoral<8>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgXor16(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldeoral<16>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgXor32(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldeoral<32>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgXor64(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldeoral<64>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgOr8(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldsetal<8>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgOr16(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldsetal<16>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgOr32(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldsetal<32>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgOr64(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldsetal<64>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgClear8(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldclral<8>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgClear16(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldclral<16>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgClear32(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldclral<32>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchgClear64(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.ldclral<64>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchg8(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.swpal<8>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchg16(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.swpal<16>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchg32(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.swpal<32>(src, dest, extractSimpleAddress(address));
	}

	void atomicXchg64(RegisterID src, Address address, RegisterID dest)
	{
	m_assembler.swpal<64>(src, dest, extractSimpleAddress(address));
	}

	void atomicStrongCAS8(RegisterID expectedAndResult, RegisterID newValue, Address address)
	{
	m_assembler.casal<8>(expectedAndResult, newValue, extractSimpleAddress(address));
	}

	void atomicStrongCAS16(RegisterID expectedAndResult, RegisterID newValue, Address address)
	{
	m_assembler.casal<16>(expectedAndResult, newValue, extractSimpleAddress(address));
	}

	void atomicStrongCAS32(RegisterID expectedAndResult, RegisterID newValue, Address address)
	{
	m_assembler.casal<32>(expectedAndResult, newValue, extractSimpleAddress(address));
	}

	void atomicStrongCAS64(RegisterID expectedAndResult, RegisterID newValue, Address address)
	{
	m_assembler.casal<64>(expectedAndResult, newValue, extractSimpleAddress(address));
	}
	};

	} // namespace JSC

	#endif // ENABLE(ASSEMBLER) && CPU(ARM64E)