src/arch/x86/insts/microregop.cc

   1 /*
   2  * Copyright (c) 2007 The Hewlett-Packard Development Company
   3  * All rights reserved.
   4  *
   5  * Redistribution and use of this software in source and binary forms,
   6  * with or without modification, are permitted provided that the
   7  * following conditions are met:
   8  *
   9  * The software must be used only for Non-Commercial Use which means any
  10  * use which is NOT directed to receiving any direct monetary
  11  * compensation for, or commercial advantage from such use.  Illustrative
  12  * examples of non-commercial use are academic research, personal study,
  13  * teaching, education and corporate research & development.
  14  * Illustrative examples of commercial use are distributing products for
  15  * commercial advantage and providing services using the software for
  16  * commercial advantage.
  17  *
  18  * If you wish to use this software or functionality therein that may be
  19  * covered by patents for commercial use, please contact:
  20  *     Director of Intellectual Property Licensing
  21  *     Office of Strategy and Technology
  22  *     Hewlett-Packard Company
  23  *     1501 Page Mill Road
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  26  * Redistributions of source code must retain the above copyright notice,
  27  * this list of conditions and the following disclaimer.  Redistributions
  28  * in binary form must reproduce the above copyright notice, this list of
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  31  * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
  32  * contributors may be used to endorse or promote products derived from
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  38  * conditions herein which includes the Non-Commercial Use restrictions;
  39  * and (ii) such Derivatives of the software include the above copyright
  40  * notice to acknowledge the contribution from this software where
  41  * applicable, this list of conditions and the disclaimer below.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  44  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  45  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  46  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  47  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  53  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  *
  55  * Authors: Gabe Black
  56  */
  57
  58 #include "arch/x86/insts/microregop.hh"
  59 #include "arch/x86/miscregs.hh"
  60 #include "base/condcodes.hh"
  61 #include <string>
  62
  63 namespace X86ISA
  64 {
  65     uint64_t RegOpBase::genFlags(uint64_t oldFlags, uint64_t flagMask,
  66             uint64_t _dest, uint64_t _src1, uint64_t _src2,
  67             bool subtract) const
  68     {
  69         DPRINTF(X86, "flagMask = %#x\n", flagMask);
  70         if (_destRegIdx[0] & (1 << 6)) {
  71             _dest >>= 8;
  72         }
  73         uint64_t flags = oldFlags & ~flagMask;
  74         if(flagMask & (ECFBit | CFBit))
  75         {
  76             if(findCarry(dataSize*8, _dest, _src1, _src2))
  77                 flags |= (flagMask & (ECFBit | CFBit));
  78             if(subtract)
  79                 flags ^= (flagMask & (ECFBit | CFBit));
  80         }
  81         if(flagMask & PFBit && findParity(dataSize*8, _dest))
  82             flags |= PFBit;
  83         if(flagMask & AFBit)
  84         {
  85             if(findCarry(4, _dest, _src1, _src2))
  86                 flags |= AFBit;
  87             if(subtract)
  88                 flags ^= AFBit;
  89         }
  90         if(flagMask & (EZFBit | ZFBit) && findZero(dataSize*8, _dest))
  91             flags |= (flagMask & (EZFBit | ZFBit));
  92         if(flagMask & SFBit && findNegative(dataSize*8, _dest))
  93             flags |= SFBit;
  94         if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
  95             flags |= OFBit;
  96         return flags;
  97     }
  98
  99     std::string RegOp::generateDisassembly(Addr pc,
 100             const SymbolTable *symtab) const
 101     {
 102         std::stringstream response;
 103
 104         printMnemonic(response, instMnem, mnemonic);
 105         printDestReg(response, 0, dataSize);
 106         response << ", ";
 107         printSrcReg(response, 0, dataSize);
 108         response << ", ";
 109         printSrcReg(response, 1, dataSize);
 110         return response.str();
 111     }
 112
 113     std::string RegOpImm::generateDisassembly(Addr pc,
 114             const SymbolTable *symtab) const
 115     {
 116         std::stringstream response;
 117
 118         printMnemonic(response, instMnem, mnemonic);
 119         printDestReg(response, 0, dataSize);
 120         response << ", ";
 121         printSrcReg(response, 0, dataSize);
 122         ccprintf(response, ", %#x", imm8);
 123         return response.str();
 124     }
 125 }