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/*
* Copyright (c) 2007 The Hewlett-Packard Development Company
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* The software must be used only for Non-Commercial Use which means any
* use which is NOT directed to receiving any direct monetary
* compensation for, or commercial advantage from such use. Illustrative
* examples of non-commercial use are academic research, personal study,
* teaching, education and corporate research & development.
* Illustrative examples of commercial use are distributing products for
* commercial advantage and providing services using the software for
* commercial advantage.
*
* If you wish to use this software or functionality therein that may be
* covered by patents for commercial use, please contact:
* Director of Intellectual Property Licensing
* Office of Strategy and Technology
* Hewlett-Packard Company
* 1501 Page Mill Road
* Palo Alto, California 94304
*
* 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission. No right of
* sublicense is granted herewith. Derivatives of the software and
* output created using the software may be prepared, but only for
* Non-Commercial Uses. Derivatives of the software may be shared with
* others provided: (i) the others agree to abide by the list of
* conditions herein which includes the Non-Commercial Use restrictions;
* and (ii) such Derivatives of the software include the above copyright
* notice to acknowledge the contribution from this software where
* applicable, this list of conditions and the disclaimer below.
*
* 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 "arch/x86/insts/microregop.hh"
#include "arch/x86/miscregs.hh"
#include "base/condcodes.hh"
#include <string>
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(Sparc, "flagMask = %#x\n", flagMask);
uint64_t flags = oldFlags & ~flagMask;
if(flagMask & CFBit)
{
if(findCarry(dataSize*8, _dest, _src1, _src2))
flags |= CFBit;
if(subtract)
flags ^= CFBit;
}
if(flagMask & PFBit && findParity(dataSize*8, _dest))
flags |= PFBit;
if(flagMask & ECFBit && findCarry(dataSize*8, _dest, _src1, _src2))
flags |= ECFBit;
if(flagMask & AFBit)
{
if(findCarry(4, _dest, _src1, _src2))
flags |= AFBit;
if(subtract)
flags ^= AFBit;
}
if(flagMask & EZFBit && findZero(dataSize*8, _dest))
flags |= EZFBit;
if(flagMask & ZFBit && findZero(dataSize*8, _dest))
flags |= ZFBit;
if(flagMask & SFBit && findNegative(dataSize*8, _dest))
flags |= SFBit;
if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
flags |= OFBit;
return flags;
}
bool RegOpBase::checkCondition(uint64_t flags) const
{
CCFlagBits ccflags = flags;
switch(ext)
{
case ConditionTests::True:
return true;
case ConditionTests::ECF:
return ccflags.ECF;
case ConditionTests::EZF:
return ccflags.EZF;
case ConditionTests::SZnZF:
return !(!ccflags.EZF & ccflags.ZF);
case ConditionTests::MSTRZ:
panic("This condition is not implemented!");
case ConditionTests::STRZ:
panic("This condition is not implemented!");
case ConditionTests::MSTRC:
panic("This condition is not implemented!");
case ConditionTests::STRZnEZF:
return !ccflags.EZF & ccflags.ZF;
//And no interrupts or debug traps are waiting
case ConditionTests::OF:
return ccflags.OF;
case ConditionTests::CF:
return ccflags.CF;
case ConditionTests::ZF:
return ccflags.ZF;
case ConditionTests::CvZF:
return ccflags.CF | ccflags.ZF;
case ConditionTests::SF:
return ccflags.SF;
case ConditionTests::PF:
return ccflags.PF;
case ConditionTests::SxOF:
return ccflags.SF ^ ccflags.OF;
case ConditionTests::SxOvZF:
return ccflags.SF ^ ccflags.OF | ccflags.ZF;
case ConditionTests::False:
return false;
case ConditionTests::NotECF:
return !ccflags.ECF;
case ConditionTests::NotEZF:
return !ccflags.EZF;
case ConditionTests::NotSZnZF:
return !ccflags.EZF & ccflags.ZF;
case ConditionTests::NotMSTRZ:
panic("This condition is not implemented!");
case ConditionTests::NotSTRZ:
panic("This condition is not implemented!");
case ConditionTests::NotMSTRC:
panic("This condition is not implemented!");
case ConditionTests::STRnZnEZF:
return !ccflags.EZF & !ccflags.ZF;
//And no interrupts or debug traps are waiting
case ConditionTests::NotOF:
return !ccflags.OF;
case ConditionTests::NotCF:
return !ccflags.CF;
case ConditionTests::NotZF:
return !ccflags.ZF;
case ConditionTests::NotCvZF:
return !(ccflags.CF | ccflags.ZF);
case ConditionTests::NotSF:
return !ccflags.SF;
case ConditionTests::NotPF:
return !ccflags.PF;
case ConditionTests::NotSxOF:
return !(ccflags.SF ^ ccflags.OF);
case ConditionTests::NotSxOvZF:
return !(ccflags.SF ^ ccflags.OF | ccflags.ZF);
}
panic("Unknown condition: %d\n", ext);
return true;
}
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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