LCOV - code coverage report
Current view: directory - js/src/assembler/assembler - MacroAssemblerX86.h (source / functions) Found Hit Coverage
Test: app.info Lines: 73 73 100.0 %
Date: 2012-06-02 Functions: 24 24 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  * vim: set ts=8 sw=4 et tw=79:
       3                 :  *
       4                 :  * ***** BEGIN LICENSE BLOCK *****
       5                 :  * Copyright (C) 2008 Apple Inc. All rights reserved.
       6                 :  *
       7                 :  * Redistribution and use in source and binary forms, with or without
       8                 :  * modification, are permitted provided that the following conditions
       9                 :  * are met:
      10                 :  * 1. Redistributions of source code must retain the above copyright
      11                 :  *    notice, this list of conditions and the following disclaimer.
      12                 :  * 2. Redistributions in binary form must reproduce the above copyright
      13                 :  *    notice, this list of conditions and the following disclaimer in the
      14                 :  *    documentation and/or other materials provided with the distribution.
      15                 :  *
      16                 :  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
      17                 :  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      18                 :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
      19                 :  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
      20                 :  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      21                 :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      22                 :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      23                 :  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
      24                 :  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      25                 :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      26                 :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
      27                 :  * 
      28                 :  * ***** END LICENSE BLOCK ***** */
      29                 : 
      30                 : #ifndef MacroAssemblerX86_h
      31                 : #define MacroAssemblerX86_h
      32                 : 
      33                 : #include "assembler/wtf/Platform.h"
      34                 : 
      35                 : #if ENABLE_ASSEMBLER && WTF_CPU_X86
      36                 : 
      37                 : #include "MacroAssemblerX86Common.h"
      38                 : 
      39                 : namespace JSC {
      40                 : 
      41          763316 : class MacroAssemblerX86 : public MacroAssemblerX86Common {
      42                 : public:
      43          763316 :     MacroAssemblerX86()
      44          763316 :         : m_isSSE2Present(isSSE2Present())
      45                 :     {
      46          763316 :     }
      47                 : 
      48                 :     static const Scale ScalePtr = TimesFour;
      49                 :     static const unsigned int TotalRegisters = 8;
      50                 : 
      51                 :     using MacroAssemblerX86Common::add32;
      52                 :     using MacroAssemblerX86Common::and32;
      53                 :     using MacroAssemblerX86Common::sub32;
      54                 :     using MacroAssemblerX86Common::or32;
      55                 :     using MacroAssemblerX86Common::load32;
      56                 :     using MacroAssemblerX86Common::store32;
      57                 :     using MacroAssemblerX86Common::branch32;
      58                 :     using MacroAssemblerX86Common::call;
      59                 :     using MacroAssemblerX86Common::loadDouble;
      60                 :     using MacroAssemblerX86Common::storeDouble;
      61                 :     using MacroAssemblerX86Common::convertInt32ToDouble;
      62                 : 
      63         5028715 :     void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
      64                 :     {
      65         5028715 :         m_assembler.leal_mr(imm.m_value, src, dest);
      66         5028715 :     }
      67                 : 
      68             216 :     void lea(Address address, RegisterID dest)
      69                 :     {
      70             216 :         m_assembler.leal_mr(address.offset, address.base, dest);
      71             216 :     }
      72                 : 
      73               2 :     void lea(BaseIndex address, RegisterID dest)
      74                 :     {
      75               2 :         m_assembler.leal_mr(address.offset, address.base, address.index, address.scale, dest);
      76               2 :     }
      77                 : 
      78            5197 :     void add32(Imm32 imm, AbsoluteAddress address)
      79                 :     {
      80            5197 :         m_assembler.addl_im(imm.m_value, address.m_ptr);
      81            5197 :     }
      82                 :     
      83                 :     void addWithCarry32(Imm32 imm, AbsoluteAddress address)
      84                 :     {
      85                 :         m_assembler.adcl_im(imm.m_value, address.m_ptr);
      86                 :     }
      87                 :     
      88                 :     void and32(Imm32 imm, AbsoluteAddress address)
      89                 :     {
      90                 :         m_assembler.andl_im(imm.m_value, address.m_ptr);
      91                 :     }
      92                 :     
      93                 :     void or32(TrustedImm32 imm, AbsoluteAddress address)
      94                 :     {
      95                 :         m_assembler.orl_im(imm.m_value, address.m_ptr);
      96                 :     }
      97                 : 
      98            2582 :     void sub32(TrustedImm32 imm, AbsoluteAddress address)
      99                 :     {
     100            2582 :         m_assembler.subl_im(imm.m_value, address.m_ptr);
     101            2582 :     }
     102                 : 
     103          431088 :     void load32(void* address, RegisterID dest)
     104                 :     {
     105          431088 :         m_assembler.movl_mr(address, dest);
     106          431088 :     }
     107                 : 
     108              22 :     void storeDouble(ImmDouble imm, Address address)
     109                 :     {
     110              22 :         store32(Imm32(imm.u.s.lsb), address);
     111              22 :         store32(Imm32(imm.u.s.msb), Address(address.base, address.offset + 4));
     112              22 :     }
     113                 : 
     114              24 :     void storeDouble(ImmDouble imm, BaseIndex address)
     115                 :     {
     116              24 :         store32(Imm32(imm.u.s.lsb), address);
     117                 :         store32(Imm32(imm.u.s.msb),
     118              24 :                 BaseIndex(address.base, address.index, address.scale, address.offset + 4));
     119              24 :     }
     120                 : 
     121          280569 :     DataLabelPtr loadDouble(const void* address, FPRegisterID dest)
     122                 :     {
     123          280569 :         ASSERT(isSSE2Present());
     124          280569 :         m_assembler.movsd_mr(address, dest);
     125          280569 :         return DataLabelPtr(this);
     126                 :     }
     127                 : 
     128                 :     void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
     129                 :     {
     130                 :         m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
     131                 :     }
     132                 : 
     133             195 :     void convertUInt32ToDouble(RegisterID srcDest, FPRegisterID dest)
     134                 :     {
     135                 :         // Trick is from nanojit/Nativei386.cpp, asm_ui2d.
     136                 :         static const double NegativeOne = 2147483648.0;
     137                 : 
     138                 :         // src is [0, 2^32-1]
     139             195 :         sub32(Imm32(0x80000000), srcDest);
     140                 : 
     141                 :         // Now src is [-2^31, 2^31-1] - int range, but not the same value.
     142             195 :         zeroDouble(dest);
     143             195 :         convertInt32ToDouble(srcDest, dest);
     144                 : 
     145                 :         // dest is now a double with the int range.
     146                 :         // correct the double value by adding (0x80000000).
     147             195 :         move(ImmPtr(&NegativeOne), srcDest);
     148             195 :         addDouble(Address(srcDest), dest);
     149             195 :     }
     150                 : 
     151                 :     void store32(TrustedImm32 imm, void* address)
     152                 :     {
     153                 :         m_assembler.movl_i32m(imm.m_value, address);
     154                 :     }
     155                 : 
     156           19127 :     void store32(RegisterID src, void* address)
     157                 :     {
     158           19127 :         m_assembler.movl_rm(src, address);
     159           19127 :     }
     160                 : 
     161           19127 :     Jump branch32(Condition cond, AbsoluteAddress left, RegisterID right)
     162                 :     {
     163           19127 :         m_assembler.cmpl_rm(right, left.m_ptr);
     164           19127 :         return Jump(m_assembler.jCC(x86Condition(cond)));
     165                 :     }
     166                 : 
     167          362293 :     Jump branch32(Condition cond, AbsoluteAddress left, TrustedImm32 right)
     168                 :     {
     169          362293 :         m_assembler.cmpl_im(right.m_value, left.m_ptr);
     170          362293 :         return Jump(m_assembler.jCC(x86Condition(cond)));
     171                 :     }
     172                 : 
     173         4905615 :     Call call()
     174                 :     {
     175         4905615 :         return Call(m_assembler.call(), Call::Linkable);
     176                 :     }
     177                 : 
     178                 :     Call tailRecursiveCall()
     179                 :     {
     180                 :         return Call::fromTailJump(jump());
     181                 :     }
     182                 : 
     183                 :     Call makeTailRecursiveCall(Jump oldJump)
     184                 :     {
     185                 :         return Call::fromTailJump(oldJump);
     186                 :     }
     187                 : 
     188                 : 
     189         1567338 :     DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
     190                 :     {
     191         1567338 :         m_assembler.movl_i32r(initialValue.asIntptr(), dest);
     192         1567338 :         return DataLabelPtr(this);
     193                 :     }
     194                 : 
     195         1032948 :     Jump branchPtrWithPatch(Condition cond, RegisterID left, DataLabelPtr& dataLabel, ImmPtr initialRightValue = ImmPtr(0))
     196                 :     {
     197         1032948 :         m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
     198         1032948 :         dataLabel = DataLabelPtr(this);
     199         1032948 :         return Jump(m_assembler.jCC(x86Condition(cond)));
     200                 :     }
     201                 : 
     202                 :     Jump branchPtrWithPatch(Condition cond, Address left, DataLabelPtr& dataLabel, ImmPtr initialRightValue = ImmPtr(0))
     203                 :     {
     204                 :         m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
     205                 :         dataLabel = DataLabelPtr(this);
     206                 :         return Jump(m_assembler.jCC(x86Condition(cond)));
     207                 :     }
     208                 : 
     209         1875405 :     DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
     210                 :     {
     211         1875405 :         m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
     212         1875405 :         return DataLabelPtr(this);
     213                 :     }
     214                 : 
     215          476707 :     Label loadPtrWithPatchToLEA(Address address, RegisterID dest)
     216                 :     {
     217          476707 :         Label label(this);
     218          476707 :         load32(address, dest);
     219                 :         return label;
     220                 :     }
     221                 : 
     222                 :     void pushAllRegs()
     223                 :     {
     224                 :         m_assembler.pusha();
     225                 :     }
     226                 : 
     227                 :     void popAllRegs()
     228                 :     {
     229                 :         m_assembler.popa();
     230                 :     }
     231                 : 
     232         2226187 :     bool supportsFloatingPoint() const { return m_isSSE2Present; }
     233                 :     // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate()
     234                 :     bool supportsFloatingPointTruncate() const { return m_isSSE2Present; }
     235             392 :     bool supportsFloatingPointSqrt() const { return m_isSSE2Present; }
     236                 : 
     237                 : private:
     238                 :     const bool m_isSSE2Present;
     239                 : 
     240                 :     friend class LinkBuffer;
     241                 :     friend class RepatchBuffer;
     242                 : 
     243         4905105 :     static void linkCall(void* code, Call call, FunctionPtr function)
     244                 :     {
     245         4905105 :         X86Assembler::linkCall(code, call.m_jmp, function.value());
     246         4905105 :     }
     247                 : 
     248                 :     static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
     249                 :     {
     250                 :         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
     251                 :     }
     252                 : 
     253           66466 :     static void repatchCall(CodeLocationCall call, FunctionPtr destination)
     254                 :     {
     255           66466 :         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
     256           66466 :     }
     257                 : };
     258                 : 
     259                 : } // namespace JSC
     260                 : 
     261                 : #endif // ENABLE(ASSEMBLER)
     262                 : 
     263                 : #endif // MacroAssemblerX86_h

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