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/*
* Copyright (c) 2007 The Hewlett-Packard Development Company
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#include <string>
#include "arch/x86/insts/microregop.hh"
#include "arch/x86/regs/misc.hh"
#include "base/condcodes.hh"
#include "debug/X86.hh"
namespace X86ISA
{
uint64_t RegOpBase::genFlags(uint64_t oldFlags, uint64_t flagMask,
uint64_t _dest, uint64_t _src1, uint64_t _src2,
bool subtract) const
{
DPRINTF(X86, "flagMask = %#x\n", flagMask);
uint64_t flags = oldFlags & ~flagMask;
if(flagMask & (ECFBit | CFBit))
{
if(findCarry(dataSize*8, _dest, _src1, _src2))
flags |= (flagMask & (ECFBit | CFBit));
if(subtract)
flags ^= (flagMask & (ECFBit | CFBit));
}
if(flagMask & PFBit && !findParity(8, _dest))
flags |= PFBit;
if(flagMask & AFBit)
{
if(findCarry(4, _dest, _src1, _src2))
flags |= AFBit;
if(subtract)
flags ^= AFBit;
}
if(flagMask & (EZFBit | ZFBit) && findZero(dataSize*8, _dest))
flags |= (flagMask & (EZFBit | ZFBit));
if(flagMask & SFBit && findNegative(dataSize*8, _dest))
flags |= SFBit;
if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
flags |= OFBit;
return flags;
}
std::string RegOp::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
std::stringstream response;
printMnemonic(response, instMnem, mnemonic);
printDestReg(response, 0, dataSize);
response << ", ";
printSrcReg(response, 0, dataSize);
response << ", ";
printSrcReg(response, 1, dataSize);
return response.str();
}
std::string RegOpImm::generateDisassembly(Addr pc,
const SymbolTable *symtab) const
{
std::stringstream response;
printMnemonic(response, instMnem, mnemonic);
printDestReg(response, 0, dataSize);
response << ", ";
printSrcReg(response, 0, dataSize);
ccprintf(response, ", %#x", imm8);
return response.str();
}
}
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