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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 "arch/x86/insts/microop.hh"
#include "arch/x86/regs/misc.hh"
namespace X86ISA
{
bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
{
CCFlagBits ccflags = flags;
switch(condition)
{
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", condition);
return true;
}
}
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