mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
386 lines
14 KiB
C++
386 lines
14 KiB
C++
/*
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* Copyright (C) 2008-2019 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(X86)
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#include "MacroAssemblerX86Common.h"
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namespace JSC {
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class MacroAssemblerX86 : public MacroAssemblerX86Common {
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public:
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static constexpr unsigned numGPRs = 8;
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static constexpr unsigned numFPRs = 8;
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using MacroAssemblerX86Common::add32;
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using MacroAssemblerX86Common::and32;
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using MacroAssemblerX86Common::branchAdd32;
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using MacroAssemblerX86Common::branchSub32;
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using MacroAssemblerX86Common::sub32;
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using MacroAssemblerX86Common::or32;
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using MacroAssemblerX86Common::load32;
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using MacroAssemblerX86Common::load8;
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using MacroAssemblerX86Common::store32;
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using MacroAssemblerX86Common::store8;
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using MacroAssemblerX86Common::branch32;
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using MacroAssemblerX86Common::call;
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using MacroAssemblerX86Common::jump;
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using MacroAssemblerX86Common::farJump;
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using MacroAssemblerX86Common::addDouble;
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using MacroAssemblerX86Common::loadDouble;
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using MacroAssemblerX86Common::storeDouble;
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using MacroAssemblerX86Common::convertInt32ToDouble;
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using MacroAssemblerX86Common::branch8;
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using MacroAssemblerX86Common::branchTest8;
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void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
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{
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m_assembler.leal_mr(imm.m_value, src, dest);
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}
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void add32(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.addl_im(imm.m_value, address.m_ptr);
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}
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void add32(AbsoluteAddress address, RegisterID dest)
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{
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m_assembler.addl_mr(address.m_ptr, dest);
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}
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void add64(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.addl_im(imm.m_value, address.m_ptr);
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m_assembler.adcl_im(imm.m_value >> 31, reinterpret_cast<const char*>(address.m_ptr) + sizeof(int32_t));
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}
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void getEffectiveAddress(BaseIndex address, RegisterID dest)
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{
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return x86Lea32(address, dest);
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}
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void and32(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.andl_im(imm.m_value, address.m_ptr);
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}
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void or32(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.orl_im(imm.m_value, address.m_ptr);
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}
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void or32(RegisterID reg, AbsoluteAddress address)
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{
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m_assembler.orl_rm(reg, address.m_ptr);
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}
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void or16(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.orw_im(imm.m_value, address.m_ptr);
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}
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void sub32(TrustedImm32 imm, AbsoluteAddress address)
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{
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m_assembler.subl_im(imm.m_value, address.m_ptr);
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}
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void load32(const void* address, RegisterID dest)
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{
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m_assembler.movl_mr(address, dest);
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}
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void load8(const void* address, RegisterID dest)
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{
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m_assembler.movzbl_mr(address, dest);
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}
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void abortWithReason(AbortReason reason)
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{
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move(TrustedImm32(reason), X86Registers::eax);
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breakpoint();
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}
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void abortWithReason(AbortReason reason, intptr_t misc)
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{
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move(TrustedImm32(misc), X86Registers::edx);
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abortWithReason(reason);
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}
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ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest)
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{
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ConvertibleLoadLabel result = ConvertibleLoadLabel(this);
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m_assembler.movl_mr(address.offset, address.base, dest);
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return result;
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}
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void addDouble(AbsoluteAddress address, FPRegisterID dest)
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{
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m_assembler.addsd_mr(address.m_ptr, dest);
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}
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void storeDouble(FPRegisterID src, TrustedImmPtr address)
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{
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ASSERT(address.m_value);
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m_assembler.movsd_rm(src, address.asPtr());
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}
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void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
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{
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m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
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}
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void store32(TrustedImm32 imm, void* address)
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{
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m_assembler.movl_i32m(imm.m_value, address);
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}
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void store32(RegisterID src, void* address)
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{
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m_assembler.movl_rm(src, address);
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}
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void store8(RegisterID src, void* address)
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{
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m_assembler.movb_rm(src, address);
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}
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void store8(TrustedImm32 imm, void* address)
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{
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TrustedImm32 imm8(static_cast<int8_t>(imm.m_value));
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m_assembler.movb_i8m(imm8.m_value, address);
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}
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void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2)
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{
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m_assembler.pextrw_irr(3, src, dest1);
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m_assembler.pextrw_irr(2, src, dest2);
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lshift32(TrustedImm32(16), dest1);
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or32(dest1, dest2);
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moveFloatTo32(src, dest1);
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}
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void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch)
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{
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move32ToFloat(src1, dest);
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move32ToFloat(src2, scratch);
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lshiftPacked(TrustedImm32(32), scratch);
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orPacked(scratch, dest);
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}
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Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
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{
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m_assembler.addl_im(imm.m_value, dest.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branchSub32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
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{
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m_assembler.subl_im(imm.m_value, dest.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branch32(RelationalCondition cond, AbsoluteAddress left, RegisterID right)
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{
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m_assembler.cmpl_rm(right, left.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branch32(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
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{
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m_assembler.cmpl_im(right.m_value, left.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Call call(PtrTag)
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{
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return Call(m_assembler.call(), Call::Linkable);
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}
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ALWAYS_INLINE Call call(RegisterID callTag) { return UNUSED_PARAM(callTag), call(NoPtrTag); }
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// Address is a memory location containing the address to jump to
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void farJump(AbsoluteAddress address, PtrTag)
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{
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m_assembler.jmp_m(address.m_ptr);
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}
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ALWAYS_INLINE void farJump(AbsoluteAddress address, RegisterID jumpTag) { UNUSED_PARAM(jumpTag), farJump(address, NoPtrTag); }
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DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
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{
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padBeforePatch();
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m_assembler.movl_i32r(initialValue.asIntptr(), dest);
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return DataLabelPtr(this);
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}
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Jump branch8(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
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{
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TrustedImm32 right8(static_cast<int8_t>(right.m_value));
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m_assembler.cmpb_im(right8.m_value, left.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branchTest8(ResultCondition cond, AbsoluteAddress address, TrustedImm32 mask = TrustedImm32(-1))
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{
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TrustedImm32 mask8(static_cast<int8_t>(mask.m_value));
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if (mask8.m_value == -1)
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m_assembler.cmpb_im(0, address.m_ptr);
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else
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m_assembler.testb_im(mask8.m_value, address.m_ptr);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branchPtrWithPatch(RelationalCondition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(nullptr))
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{
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padBeforePatch();
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m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
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dataLabel = DataLabelPtr(this);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(nullptr))
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{
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padBeforePatch();
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m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
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dataLabel = DataLabelPtr(this);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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Jump branch32WithPatch(RelationalCondition cond, Address left, DataLabel32& dataLabel, TrustedImm32 initialRightValue = TrustedImm32(0))
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{
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padBeforePatch();
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m_assembler.cmpl_im_force32(initialRightValue.m_value, left.offset, left.base);
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dataLabel = DataLabel32(this);
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return Jump(m_assembler.jCC(x86Condition(cond)));
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}
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DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
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{
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padBeforePatch();
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m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
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return DataLabelPtr(this);
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}
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static bool supportsFloatingPoint() { return true; }
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static bool supportsFloatingPointTruncate() { return true; }
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static bool supportsFloatingPointSqrt() { return true; }
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static bool supportsFloatingPointAbs() { return true; }
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template<PtrTag resultTag, PtrTag locationTag>
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static FunctionPtr<resultTag> readCallTarget(CodeLocationCall<locationTag> call)
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{
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intptr_t offset = WTF::unalignedLoad<int32_t>(bitwise_cast<int32_t*>(call.dataLocation()) - 1);
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return FunctionPtr<resultTag>(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(call.dataLocation()) + offset));
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}
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static bool canJumpReplacePatchableBranchPtrWithPatch() { return true; }
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static bool canJumpReplacePatchableBranch32WithPatch() { return true; }
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template<PtrTag tag>
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static CodeLocationLabel<tag> startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr<tag> label)
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{
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const int opcodeBytes = 1;
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const int modRMBytes = 1;
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const int immediateBytes = 4;
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const int totalBytes = opcodeBytes + modRMBytes + immediateBytes;
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ASSERT(totalBytes >= maxJumpReplacementSize());
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return label.labelAtOffset(-totalBytes);
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}
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template<PtrTag tag>
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static CodeLocationLabel<tag> startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr<tag> label)
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{
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const int opcodeBytes = 1;
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const int modRMBytes = 1;
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const int offsetBytes = 0;
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const int immediateBytes = 4;
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const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
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ASSERT(totalBytes >= maxJumpReplacementSize());
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return label.labelAtOffset(-totalBytes);
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}
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template<PtrTag tag>
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static CodeLocationLabel<tag> startOfPatchableBranch32WithPatchOnAddress(CodeLocationDataLabel32<tag> label)
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{
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const int opcodeBytes = 1;
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const int modRMBytes = 1;
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const int offsetBytes = 0;
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const int immediateBytes = 4;
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const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
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ASSERT(totalBytes >= maxJumpReplacementSize());
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return label.labelAtOffset(-totalBytes);
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}
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template<PtrTag tag>
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static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel<tag> instructionStart, RegisterID reg, void* initialValue)
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{
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X86Assembler::revertJumpTo_cmpl_ir_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), reg);
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}
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template<PtrTag tag>
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static void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel<tag> instructionStart, Address address, void* initialValue)
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{
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ASSERT(!address.offset);
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X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), 0, address.base);
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}
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template<PtrTag tag>
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static void revertJumpReplacementToPatchableBranch32WithPatch(CodeLocationLabel<tag> instructionStart, Address address, int32_t initialValue)
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{
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ASSERT(!address.offset);
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X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), initialValue, 0, address.base);
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}
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template<PtrTag callTag, PtrTag destTag>
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static void repatchCall(CodeLocationCall<callTag> call, CodeLocationLabel<destTag> destination)
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{
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X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
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}
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template<PtrTag callTag, PtrTag destTag>
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static void repatchCall(CodeLocationCall<callTag> call, FunctionPtr<destTag> destination)
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{
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X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
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}
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private:
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friend class LinkBuffer;
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template<PtrTag tag>
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static void linkCall(void* code, Call call, FunctionPtr<tag> function)
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{
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if (call.isFlagSet(Call::Tail))
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X86Assembler::linkJump(code, call.m_label, function.executableAddress());
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else
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X86Assembler::linkCall(code, call.m_label, function.executableAddress());
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}
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};
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} // namespace JSC
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#endif // ENABLE(ASSEMBLER)
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