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diff --git a/src/3rdparty/masm/assembler/MacroAssemblerX86.h b/src/3rdparty/masm/assembler/MacroAssemblerX86.h
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+/*
+ * Copyright (C) 2008 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. 
+ */
+
+#ifndef MacroAssemblerX86_h
+#define MacroAssemblerX86_h
+
+#if ENABLE(ASSEMBLER) && CPU(X86)
+
+#include "MacroAssemblerX86Common.h"
+
+namespace JSC {
+
+class MacroAssemblerX86 : public MacroAssemblerX86Common {
+public:
+    static const Scale ScalePtr = TimesFour;
+
+    using MacroAssemblerX86Common::add32;
+    using MacroAssemblerX86Common::and32;
+    using MacroAssemblerX86Common::branchAdd32;
+    using MacroAssemblerX86Common::branchSub32;
+    using MacroAssemblerX86Common::sub32;
+    using MacroAssemblerX86Common::or32;
+    using MacroAssemblerX86Common::load32;
+    using MacroAssemblerX86Common::store32;
+    using MacroAssemblerX86Common::store8;
+    using MacroAssemblerX86Common::branch32;
+    using MacroAssemblerX86Common::call;
+    using MacroAssemblerX86Common::jump;
+    using MacroAssemblerX86Common::addDouble;
+    using MacroAssemblerX86Common::loadDouble;
+    using MacroAssemblerX86Common::storeDouble;
+    using MacroAssemblerX86Common::convertInt32ToDouble;
+    using MacroAssemblerX86Common::branchTest8;
+
+    void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
+    {
+        m_assembler.leal_mr(imm.m_value, src, dest);
+    }
+
+    void add32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.addl_im(imm.m_value, address.m_ptr);
+    }
+    
+    void add32(AbsoluteAddress address, RegisterID dest)
+    {
+        m_assembler.addl_mr(address.m_ptr, dest);
+    }
+    
+    void add64(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.addl_im(imm.m_value, address.m_ptr);
+        m_assembler.adcl_im(imm.m_value >> 31, reinterpret_cast<const char*>(address.m_ptr) + sizeof(int32_t));
+    }
+
+    void and32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.andl_im(imm.m_value, address.m_ptr);
+    }
+    
+    void or32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.orl_im(imm.m_value, address.m_ptr);
+    }
+    
+    void or32(RegisterID reg, AbsoluteAddress address)
+    {
+        m_assembler.orl_rm(reg, address.m_ptr);
+    }
+    
+    void sub32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.subl_im(imm.m_value, address.m_ptr);
+    }
+
+    void load32(const void* address, RegisterID dest)
+    {
+        m_assembler.movl_mr(address, dest);
+    }
+
+    ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest)
+    {
+        ConvertibleLoadLabel result = ConvertibleLoadLabel(this);
+        m_assembler.movl_mr(address.offset, address.base, dest);
+        return result;
+    }
+
+    void addDouble(AbsoluteAddress address, FPRegisterID dest)
+    {
+        m_assembler.addsd_mr(address.m_ptr, dest);
+    }
+
+    void storeDouble(FPRegisterID src, const void* address)
+    {
+        ASSERT(isSSE2Present());
+        m_assembler.movsd_rm(src, address);
+    }
+
+    void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
+    {
+        m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
+    }
+
+    void store32(TrustedImm32 imm, void* address)
+    {
+        m_assembler.movl_i32m(imm.m_value, address);
+    }
+
+    void store32(RegisterID src, void* address)
+    {
+        m_assembler.movl_rm(src, address);
+    }
+
+    void store8(TrustedImm32 imm, void* address)
+    {
+        ASSERT(-128 <= imm.m_value && imm.m_value < 128);
+        m_assembler.movb_i8m(imm.m_value, address);
+    }
+    
+    // Possibly clobbers src.
+    void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2)
+    {
+        movePackedToInt32(src, dest1);
+        rshiftPacked(TrustedImm32(32), src);
+        movePackedToInt32(src, dest2);
+    }
+
+    void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch)
+    {
+        moveInt32ToPacked(src1, dest);
+        moveInt32ToPacked(src2, scratch);
+        lshiftPacked(TrustedImm32(32), scratch);
+        orPacked(scratch, dest);
+    }
+
+    Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
+    {
+        m_assembler.addl_im(imm.m_value, dest.m_ptr);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Jump branchSub32(ResultCondition cond, TrustedImm32 imm, AbsoluteAddress dest)
+    {
+        m_assembler.subl_im(imm.m_value, dest.m_ptr);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Jump branch32(RelationalCondition cond, AbsoluteAddress left, RegisterID right)
+    {
+        m_assembler.cmpl_rm(right, left.m_ptr);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Jump branch32(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
+    {
+        m_assembler.cmpl_im(right.m_value, left.m_ptr);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Call call()
+    {
+        return Call(m_assembler.call(), Call::Linkable);
+    }
+
+    // Address is a memory location containing the address to jump to
+    void jump(AbsoluteAddress address)
+    {
+        m_assembler.jmp_m(address.m_ptr);
+    }
+
+    Call tailRecursiveCall()
+    {
+        return Call::fromTailJump(jump());
+    }
+
+    Call makeTailRecursiveCall(Jump oldJump)
+    {
+        return Call::fromTailJump(oldJump);
+    }
+
+
+    DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
+    {
+        padBeforePatch();
+        m_assembler.movl_i32r(initialValue.asIntptr(), dest);
+        return DataLabelPtr(this);
+    }
+    
+    Jump branchTest8(ResultCondition cond, AbsoluteAddress address, TrustedImm32 mask = TrustedImm32(-1))
+    {
+        ASSERT(mask.m_value >= -128 && mask.m_value <= 255);
+        if (mask.m_value == -1)
+            m_assembler.cmpb_im(0, address.m_ptr);
+        else
+            m_assembler.testb_im(mask.m_value, address.m_ptr);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Jump branchPtrWithPatch(RelationalCondition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
+    {
+        padBeforePatch();
+        m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
+        dataLabel = DataLabelPtr(this);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    Jump branchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
+    {
+        padBeforePatch();
+        m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
+        dataLabel = DataLabelPtr(this);
+        return Jump(m_assembler.jCC(x86Condition(cond)));
+    }
+
+    DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
+    {
+        padBeforePatch();
+        m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
+        return DataLabelPtr(this);
+    }
+
+    static bool supportsFloatingPoint() { return isSSE2Present(); }
+    // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate()
+    static bool supportsFloatingPointTruncate() { return isSSE2Present(); }
+    static bool supportsFloatingPointSqrt() { return isSSE2Present(); }
+    static bool supportsFloatingPointAbs() { return isSSE2Present(); }
+    
+    static FunctionPtr readCallTarget(CodeLocationCall call)
+    {
+        intptr_t offset = reinterpret_cast<int32_t*>(call.dataLocation())[-1];
+        return FunctionPtr(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(call.dataLocation()) + offset));
+    }
+
+    static bool canJumpReplacePatchableBranchPtrWithPatch() { return true; }
+    
+    static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label)
+    {
+        const int opcodeBytes = 1;
+        const int modRMBytes = 1;
+        const int immediateBytes = 4;
+        const int totalBytes = opcodeBytes + modRMBytes + immediateBytes;
+        ASSERT(totalBytes >= maxJumpReplacementSize());
+        return label.labelAtOffset(-totalBytes);
+    }
+    
+    static CodeLocationLabel startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr label)
+    {
+        const int opcodeBytes = 1;
+        const int modRMBytes = 1;
+        const int offsetBytes = 0;
+        const int immediateBytes = 4;
+        const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
+        ASSERT(totalBytes >= maxJumpReplacementSize());
+        return label.labelAtOffset(-totalBytes);
+    }
+    
+    static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, RegisterID reg, void* initialValue)
+    {
+        X86Assembler::revertJumpTo_cmpl_ir_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), reg);
+    }
+
+    static void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel instructionStart, Address address, void* initialValue)
+    {
+        ASSERT(!address.offset);
+        X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), 0, address.base);
+    }
+
+private:
+    friend class LinkBuffer;
+    friend class RepatchBuffer;
+
+    static void linkCall(void* code, Call call, FunctionPtr function)
+    {
+        X86Assembler::linkCall(code, call.m_label, function.value());
+    }
+
+    static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
+    {
+        X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
+    }
+
+    static void repatchCall(CodeLocationCall call, FunctionPtr destination)
+    {
+        X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
+    }
+};
+
+} // namespace JSC
+
+#endif // ENABLE(ASSEMBLER)
+
+#endif // MacroAssemblerX86_h