mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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278 lines
9.3 KiB
C++
278 lines
9.3 KiB
C++
/*
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* Copyright (C) 2018-2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(ASSEMBLER) && CPU(ARM64E)
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// We need to include this before MacroAssemblerARM64.h because MacroAssemblerARM64
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// will be defined in terms of ARM64EAssembler for ARM64E.
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#include "ARM64EAssembler.h"
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#include "JSCPtrTag.h"
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#include "MacroAssemblerARM64.h"
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namespace JSC {
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using Assembler = TARGET_ASSEMBLER;
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class MacroAssemblerARM64E : public MacroAssemblerARM64 {
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public:
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static constexpr unsigned numberOfPACBits = 25;
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static constexpr uintptr_t nonPACBitsMask = (1ull << (64 - numberOfPACBits)) - 1;
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ALWAYS_INLINE void tagReturnAddress()
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{
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tagPtr(ARM64Registers::sp, ARM64Registers::lr);
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}
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ALWAYS_INLINE void untagReturnAddress()
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{
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untagPtr(ARM64Registers::sp, ARM64Registers::lr);
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}
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ALWAYS_INLINE void tagPtr(PtrTag tag, RegisterID target)
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{
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auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
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move(TrustedImm64(tag), tagGPR);
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m_assembler.pacib(target, tagGPR);
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}
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ALWAYS_INLINE void tagPtr(RegisterID tag, RegisterID target)
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{
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if (target == ARM64Registers::lr && tag == ARM64Registers::sp) {
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m_assembler.pacibsp();
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return;
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}
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m_assembler.pacib(target, tag);
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}
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ALWAYS_INLINE void untagPtr(PtrTag tag, RegisterID target)
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{
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auto tagGPR = getCachedDataTempRegisterIDAndInvalidate();
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move(TrustedImm64(tag), tagGPR);
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m_assembler.autib(target, tagGPR);
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}
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ALWAYS_INLINE void untagPtr(RegisterID tag, RegisterID target)
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{
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m_assembler.autib(target, tag);
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}
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ALWAYS_INLINE void removePtrTag(RegisterID target)
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{
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m_assembler.xpaci(target);
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}
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ALWAYS_INLINE void tagArrayPtr(RegisterID length, RegisterID target)
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{
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m_assembler.pacdb(target, length);
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}
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ALWAYS_INLINE void untagArrayPtr(RegisterID length, RegisterID target)
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{
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m_assembler.autdb(target, length);
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}
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ALWAYS_INLINE void untagArrayPtr(Address length, RegisterID target)
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{
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auto lengthGPR = getCachedDataTempRegisterIDAndInvalidate();
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load32(length, lengthGPR);
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m_assembler.autdb(target, lengthGPR);
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}
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ALWAYS_INLINE void removeArrayPtrTag(RegisterID target)
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{
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m_assembler.xpacd(target);
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}
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static const RegisterID InvalidGPR = static_cast<RegisterID>(-1);
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enum class CallSignatureType {
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CFunctionCall,
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OtherCall
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};
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template<CallSignatureType type>
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ALWAYS_INLINE Call callTrustedPtr(RegisterID tagGPR = InvalidGPR)
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{
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ASSERT(tagGPR != dataTempRegister);
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AssemblerLabel pointerLabel = m_assembler.label();
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moveWithFixedWidth(TrustedImmPtr(nullptr), getCachedDataTempRegisterIDAndInvalidate());
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invalidateAllTempRegisters();
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if (type == CallSignatureType::CFunctionCall)
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m_assembler.blraaz(dataTempRegister);
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else
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m_assembler.blrab(dataTempRegister, tagGPR);
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AssemblerLabel callLabel = m_assembler.label();
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ASSERT_UNUSED(pointerLabel, ARM64Assembler::getDifferenceBetweenLabels(callLabel, pointerLabel) == REPATCH_OFFSET_CALL_TO_POINTER);
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return Call(callLabel, Call::Linkable);
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}
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ALWAYS_INLINE Call call(PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::call(tag);
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if (tag == CFunctionPtrTag)
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return callTrustedPtr<CallSignatureType::CFunctionCall>();
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move(TrustedImm64(tag), ARM64Registers::lr);
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return callTrustedPtr<CallSignatureType::OtherCall>(ARM64Registers::lr);
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}
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ALWAYS_INLINE Call call(RegisterID tagGPR)
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{
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return callTrustedPtr<CallSignatureType::OtherCall>(tagGPR);
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}
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template<CallSignatureType type>
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ALWAYS_INLINE Call callRegister(RegisterID targetGPR, RegisterID tagGPR = InvalidGPR)
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{
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ASSERT(tagGPR != targetGPR);
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invalidateAllTempRegisters();
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if (type == CallSignatureType::CFunctionCall)
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m_assembler.blraaz(targetGPR);
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else
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m_assembler.blrab(targetGPR, tagGPR);
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return Call(m_assembler.label(), Call::None);
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}
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ALWAYS_INLINE Call call(RegisterID targetGPR, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::call(targetGPR, tag);
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if (tag == CFunctionPtrTag)
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return callRegister<CallSignatureType::CFunctionCall>(targetGPR);
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move(TrustedImm64(tag), ARM64Registers::lr);
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return callRegister<CallSignatureType::OtherCall>(targetGPR, ARM64Registers::lr);
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}
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ALWAYS_INLINE Call call(RegisterID targetGPR, RegisterID tagGPR)
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{
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return callRegister<CallSignatureType::OtherCall>(targetGPR, tagGPR);
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}
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ALWAYS_INLINE Call call(Address address, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::call(address, tag);
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load64(address, getCachedDataTempRegisterIDAndInvalidate());
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return call(dataTempRegister, tag);
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}
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ALWAYS_INLINE Call call(Address address, RegisterID tag)
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{
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ASSERT(tag != dataTempRegister);
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load64(address, getCachedDataTempRegisterIDAndInvalidate());
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return call(dataTempRegister, tag);
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}
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ALWAYS_INLINE Jump jump() { return MacroAssemblerARM64::jump(); }
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void jump(RegisterID target, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::jump(target, tag);
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ASSERT(tag != CFunctionPtrTag);
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RegisterID diversityGPR = getCachedDataTempRegisterIDAndInvalidate();
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move(TrustedImm64(tag), diversityGPR);
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jump(target, diversityGPR);
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}
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void jump(RegisterID target, RegisterID tag)
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{
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ASSERT(tag != target);
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m_assembler.brab(target, tag);
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}
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void jump(Address address, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::jump(address, tag);
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ASSERT(tag != CFunctionPtrTag);
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
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load64(address, targetGPR);
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move(TrustedImm64(tag), diversityGPR);
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m_assembler.brab(targetGPR, diversityGPR);
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}
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void jump(Address address, RegisterID tag)
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{
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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ASSERT(tag != targetGPR);
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load64(address, targetGPR);
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m_assembler.brab(targetGPR, tag);
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}
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void jump(BaseIndex address, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::jump(address, tag);
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ASSERT(tag != CFunctionPtrTag);
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
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load64(address, targetGPR);
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move(TrustedImm64(tag), diversityGPR);
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m_assembler.brab(targetGPR, diversityGPR);
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}
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void jump(BaseIndex address, RegisterID tag)
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{
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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ASSERT(tag != targetGPR);
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load64(address, targetGPR);
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m_assembler.brab(targetGPR, tag);
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}
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void jump(AbsoluteAddress address, PtrTag tag)
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{
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if (tag == NoPtrTag)
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return MacroAssemblerARM64::jump(address, tag);
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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RegisterID diversityGPR = getCachedMemoryTempRegisterIDAndInvalidate();
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move(TrustedImmPtr(address.m_ptr), targetGPR);
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load64(Address(targetGPR), targetGPR);
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move(TrustedImm64(tag), diversityGPR);
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m_assembler.brab(targetGPR, diversityGPR);
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}
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void jump(AbsoluteAddress address, RegisterID tag)
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{
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RegisterID targetGPR = getCachedDataTempRegisterIDAndInvalidate();
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ASSERT(tag != targetGPR);
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move(TrustedImmPtr(address.m_ptr), targetGPR);
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load64(Address(targetGPR), targetGPR);
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m_assembler.brab(targetGPR, tag);
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}
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};
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} // namespace JSC
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#endif // ENABLE(ASSEMBLER) && CPU(ARM64E)
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