src/arch/x86/insts/microregop.hh

   1 /*
   2  * Copyright (c) 2007 The Hewlett-Packard Development Company
   3  * All rights reserved.
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef __ARCH_X86_INSTS_MICROREGOP_HH__
  39 #define __ARCH_X86_INSTS_MICROREGOP_HH__
  40
  41 #include "arch/x86/insts/microop.hh"
  42
  43 namespace X86ISA
  44 {
  45     /**
  46      * Base classes for RegOps which provides a generateDisassembly method.
  47      */
  48     class RegOpBase : public X86MicroopBase
  49     {
  50       protected:
  51         const RegIndex src1;
  52         const RegIndex dest;
  53         const uint8_t dataSize;
  54         const uint16_t ext;
  55         RegIndex foldOBit;
  56
  57         // Constructor
  58         RegOpBase(ExtMachInst _machInst,
  59                 const char *mnem, const char *_instMnem, uint64_t setFlags,
  60                 InstRegIndex _src1, InstRegIndex _dest,
  61                 uint8_t _dataSize, uint16_t _ext,
  62                 OpClass __opClass) :
  63             X86MicroopBase(_machInst, mnem, _instMnem, setFlags,
  64                     __opClass),
  65             src1(_src1.index()), dest(_dest.index()),
  66             dataSize(_dataSize), ext(_ext)
  67         {
  68             foldOBit = (dataSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0;
  69         }
  70
  71         //Figure out what the condition code flags should be.
  72         uint64_t genFlags(uint64_t oldFlags, uint64_t flagMask,
  73                 uint64_t _dest, uint64_t _src1, uint64_t _src2,
  74                 bool subtract = false) const;
  75     };
  76
  77     class RegOp : public RegOpBase
  78     {
  79       protected:
  80         const RegIndex src2;
  81
  82         // Constructor
  83         RegOp(ExtMachInst _machInst,
  84                 const char *mnem, const char *_instMnem, uint64_t setFlags,
  85                 InstRegIndex _src1, InstRegIndex _src2, InstRegIndex _dest,
  86                 uint8_t _dataSize, uint16_t _ext,
  87                 OpClass __opClass) :
  88             RegOpBase(_machInst, mnem, _instMnem, setFlags,
  89                     _src1, _dest, _dataSize, _ext,
  90                     __opClass),
  91             src2(_src2.index())
  92         {
  93         }
  94
  95         std::string generateDisassembly(
  96                 Addr pc, const Loader::SymbolTable *symtab) const override;
  97     };
  98
  99     class RegOpImm : public RegOpBase
 100     {
 101       protected:
 102         const uint8_t imm8;
 103
 104         // Constructor
 105         RegOpImm(ExtMachInst _machInst,
 106                 const char * mnem, const char *_instMnem, uint64_t setFlags,
 107                 InstRegIndex _src1, uint8_t _imm8, InstRegIndex _dest,
 108                 uint8_t _dataSize, uint16_t _ext,
 109                 OpClass __opClass) :
 110             RegOpBase(_machInst, mnem, _instMnem, setFlags,
 111                     _src1, _dest, _dataSize, _ext,
 112                     __opClass),
 113             imm8(_imm8)
 114         {
 115         }
 116
 117         std::string generateDisassembly(
 118                 Addr pc, const Loader::SymbolTable *symtab) const override;
 119     };
 120 }
 121
 122 #endif //__ARCH_X86_INSTS_MICROREGOP_HH__