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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef MacroAssemblerX86_h
     27 #define MacroAssemblerX86_h
     28 
     29 #include <wtf/Platform.h>
     30 
     31 #if ENABLE(ASSEMBLER) && CPU(X86)
     32 
     33 #include "MacroAssemblerX86Common.h"
     34 
     35 namespace JSC {
     36 
     37 class MacroAssemblerX86 : public MacroAssemblerX86Common {
     38 public:
     39     MacroAssemblerX86()
     40         : m_isSSE2Present(isSSE2Present())
     41     {
     42     }
     43 
     44     static const Scale ScalePtr = TimesFour;
     45 
     46     using MacroAssemblerX86Common::add32;
     47     using MacroAssemblerX86Common::and32;
     48     using MacroAssemblerX86Common::sub32;
     49     using MacroAssemblerX86Common::or32;
     50     using MacroAssemblerX86Common::load32;
     51     using MacroAssemblerX86Common::store32;
     52     using MacroAssemblerX86Common::branch32;
     53     using MacroAssemblerX86Common::call;
     54     using MacroAssemblerX86Common::loadDouble;
     55     using MacroAssemblerX86Common::convertInt32ToDouble;
     56 
     57     void add32(Imm32 imm, RegisterID src, RegisterID dest)
     58     {
     59         m_assembler.leal_mr(imm.m_value, src, dest);
     60     }
     61 
     62     void add32(Imm32 imm, AbsoluteAddress address)
     63     {
     64         m_assembler.addl_im(imm.m_value, address.m_ptr);
     65     }
     66 
     67     void addWithCarry32(Imm32 imm, AbsoluteAddress address)
     68     {
     69         m_assembler.adcl_im(imm.m_value, address.m_ptr);
     70     }
     71 
     72     void and32(Imm32 imm, AbsoluteAddress address)
     73     {
     74         m_assembler.andl_im(imm.m_value, address.m_ptr);
     75     }
     76 
     77     void or32(Imm32 imm, AbsoluteAddress address)
     78     {
     79         m_assembler.orl_im(imm.m_value, address.m_ptr);
     80     }
     81 
     82     void sub32(Imm32 imm, AbsoluteAddress address)
     83     {
     84         m_assembler.subl_im(imm.m_value, address.m_ptr);
     85     }
     86 
     87     void load32(void* address, RegisterID dest)
     88     {
     89         m_assembler.movl_mr(address, dest);
     90     }
     91 
     92     void loadDouble(void* address, FPRegisterID dest)
     93     {
     94         ASSERT(isSSE2Present());
     95         m_assembler.movsd_mr(address, dest);
     96     }
     97 
     98     void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
     99     {
    100         m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
    101     }
    102 
    103     void store32(Imm32 imm, void* address)
    104     {
    105         m_assembler.movl_i32m(imm.m_value, address);
    106     }
    107 
    108     void store32(RegisterID src, void* address)
    109     {
    110         m_assembler.movl_rm(src, address);
    111     }
    112 
    113     Jump branch32(Condition cond, AbsoluteAddress left, RegisterID right)
    114     {
    115         m_assembler.cmpl_rm(right, left.m_ptr);
    116         return Jump(m_assembler.jCC(x86Condition(cond)));
    117     }
    118 
    119     Jump branch32(Condition cond, AbsoluteAddress left, Imm32 right)
    120     {
    121         m_assembler.cmpl_im(right.m_value, left.m_ptr);
    122         return Jump(m_assembler.jCC(x86Condition(cond)));
    123     }
    124 
    125     Call call()
    126     {
    127         return Call(m_assembler.call(), Call::Linkable);
    128     }
    129 
    130     Call tailRecursiveCall()
    131     {
    132         return Call::fromTailJump(jump());
    133     }
    134 
    135     Call makeTailRecursiveCall(Jump oldJump)
    136     {
    137         return Call::fromTailJump(oldJump);
    138     }
    139 
    140 
    141     DataLabelPtr moveWithPatch(ImmPtr initialValue, RegisterID dest)
    142     {
    143         m_assembler.movl_i32r(initialValue.asIntptr(), dest);
    144         return DataLabelPtr(this);
    145     }
    146 
    147     Jump branchPtrWithPatch(Condition cond, RegisterID left, DataLabelPtr& dataLabel, ImmPtr initialRightValue = ImmPtr(0))
    148     {
    149         m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
    150         dataLabel = DataLabelPtr(this);
    151         return Jump(m_assembler.jCC(x86Condition(cond)));
    152     }
    153 
    154     Jump branchPtrWithPatch(Condition cond, Address left, DataLabelPtr& dataLabel, ImmPtr initialRightValue = ImmPtr(0))
    155     {
    156         m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
    157         dataLabel = DataLabelPtr(this);
    158         return Jump(m_assembler.jCC(x86Condition(cond)));
    159     }
    160 
    161     DataLabelPtr storePtrWithPatch(ImmPtr initialValue, ImplicitAddress address)
    162     {
    163         m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
    164         return DataLabelPtr(this);
    165     }
    166 
    167     Label loadPtrWithPatchToLEA(Address address, RegisterID dest)
    168     {
    169         Label label(this);
    170         load32(address, dest);
    171         return label;
    172     }
    173 
    174     bool supportsFloatingPoint() const { return m_isSSE2Present; }
    175     // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate()
    176     bool supportsFloatingPointTruncate() const { return m_isSSE2Present; }
    177 
    178 private:
    179     const bool m_isSSE2Present;
    180 
    181     friend class LinkBuffer;
    182     friend class RepatchBuffer;
    183 
    184     static void linkCall(void* code, Call call, FunctionPtr function)
    185     {
    186         X86Assembler::linkCall(code, call.m_jmp, function.value());
    187     }
    188 
    189     static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
    190     {
    191         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
    192     }
    193 
    194     static void repatchCall(CodeLocationCall call, FunctionPtr destination)
    195     {
    196         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
    197     }
    198 };
    199 
    200 } // namespace JSC
    201 
    202 #endif // ENABLE(ASSEMBLER)
    203 
    204 #endif // MacroAssemblerX86_h
    205