src/arch/x86/insts/micromediaop.hh

   1 /*
   2  * Copyright (c) 2009 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * 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  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY 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  * Authors: Gabe Black
  29  */
  30
  31 #ifndef __ARCH_X86_INSTS_MICROMEDIAOP_HH__
  32 #define __ARCH_X86_INSTS_MICROMEDIAOP_HH__
  33
  34 #include "arch/x86/insts/microop.hh"
  35
  36 namespace X86ISA
  37 {
  38     enum MediaFlag {
  39         MediaMultHiOp = 1,
  40         MediaSignedOp = 64,
  41         MediaScalarOp = 128
  42     };
  43
  44     class MediaOpBase : public X86MicroopBase
  45     {
  46       protected:
  47         const RegIndex src1;
  48         const RegIndex dest;
  49         const uint8_t srcSize;
  50         const uint8_t destSize;
  51         const uint8_t ext;
  52         static const RegIndex foldOBit = 0;
  53
  54         // Constructor
  55         MediaOpBase(ExtMachInst _machInst,
  56                 const char *mnem, const char *_instMnem, uint64_t setFlags,
  57                 InstRegIndex _src1, InstRegIndex _dest,
  58                 uint8_t _srcSize, uint8_t _destSize, uint8_t _ext,
  59                 OpClass __opClass) :
  60             X86MicroopBase(_machInst, mnem, _instMnem, setFlags,
  61                     __opClass),
  62             src1(_src1.index()), dest(_dest.index()),
  63             srcSize(_srcSize), destSize(_destSize), ext(_ext)
  64         {}
  65
  66         bool
  67         scalarOp() const
  68         {
  69             return ext & MediaScalarOp;
  70         }
  71
  72         int
  73         numItems(int size) const
  74         {
  75             return scalarOp() ? 1 : (sizeof(FloatReg) / size);
  76         }
  77
  78         bool
  79         multHi() const
  80         {
  81             return ext & MediaMultHiOp;
  82         }
  83
  84         bool
  85         signedOp() const
  86         {
  87             return ext & MediaSignedOp;
  88         }
  89     };
  90
  91     class MediaOpReg : public MediaOpBase
  92     {
  93       protected:
  94         const RegIndex src2;
  95
  96         // Constructor
  97         MediaOpReg(ExtMachInst _machInst,
  98                 const char *mnem, const char *_instMnem, uint64_t setFlags,
  99                 InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
 100                 uint8_t _srcSize, uint8_t _destSize, uint8_t _ext,
 101                 OpClass __opClass) :
 102             MediaOpBase(_machInst, mnem, _instMnem, setFlags,
 103                     _src1, _dest, _srcSize, _destSize, _ext,
 104                     __opClass),
 105             src2(_src2.index())
 106         {}
 107
 108         std::string generateDisassembly(Addr pc,
 109             const SymbolTable *symtab) const;
 110     };
 111
 112     class MediaOpImm : public MediaOpBase
 113     {
 114       protected:
 115         uint8_t imm8;
 116
 117         // Constructor
 118         MediaOpImm(ExtMachInst _machInst,
 119                 const char *mnem, const char *_instMnem, uint64_t setFlags,
 120                 InstRegIndex _src1, uint8_t _imm8, InstRegIndex _dest,
 121                 uint8_t _srcSize, uint8_t _destSize, uint8_t _ext,
 122                 OpClass __opClass) :
 123             MediaOpBase(_machInst, mnem, _instMnem, setFlags,
 124                     _src1, _dest, _srcSize, _destSize, _ext,
 125                     __opClass),
 126             imm8(_imm8)
 127         {}
 128
 129         std::string generateDisassembly(Addr pc,
 130             const SymbolTable *symtab) const;
 131     };
 132 }
 133
 134 #endif //__ARCH_X86_INSTS_MICROMEDIAOP_HH__