123 lines
5.1 KiB
C++
123 lines
5.1 KiB
C++
/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include "arch/x86/insts/microop.hh"
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#include "arch/x86/regs/misc.hh"
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namespace X86ISA
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{
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bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
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{
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CCFlagBits ccflags = flags;
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switch(condition)
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{
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case ConditionTests::True:
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return true;
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case ConditionTests::ECF:
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return ccflags.ecf;
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case ConditionTests::EZF:
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return ccflags.ezf;
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case ConditionTests::SZnZF:
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return !(!ccflags.ezf && ccflags.zf);
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case ConditionTests::MSTRZ:
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panic("This condition is not implemented!");
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case ConditionTests::STRZ:
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panic("This condition is not implemented!");
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case ConditionTests::MSTRC:
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panic("This condition is not implemented!");
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case ConditionTests::STRZnEZF:
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return !ccflags.ezf && ccflags.zf;
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//And no interrupts or debug traps are waiting
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case ConditionTests::OF:
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return ccflags.of;
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case ConditionTests::CF:
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return ccflags.cf;
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case ConditionTests::ZF:
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return ccflags.zf;
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case ConditionTests::CvZF:
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return ccflags.cf | ccflags.zf;
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case ConditionTests::SF:
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return ccflags.sf;
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case ConditionTests::PF:
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return ccflags.pf;
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case ConditionTests::SxOF:
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return ccflags.sf ^ ccflags.of;
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case ConditionTests::SxOvZF:
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return (ccflags.sf ^ ccflags.of) | ccflags.zf;
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case ConditionTests::False:
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return false;
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case ConditionTests::NotECF:
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return !ccflags.ecf;
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case ConditionTests::NotEZF:
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return !ccflags.ezf;
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case ConditionTests::NotSZnZF:
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return !ccflags.ezf && ccflags.zf;
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case ConditionTests::NotMSTRZ:
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panic("This condition is not implemented!");
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case ConditionTests::NotSTRZ:
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panic("This condition is not implemented!");
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case ConditionTests::NotMSTRC:
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panic("This condition is not implemented!");
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case ConditionTests::STRnZnEZF:
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return !ccflags.ezf && !ccflags.zf;
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//And no interrupts or debug traps are waiting
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case ConditionTests::NotOF:
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return !ccflags.of;
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case ConditionTests::NotCF:
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return !ccflags.cf;
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case ConditionTests::NotZF:
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return !ccflags.zf;
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case ConditionTests::NotCvZF:
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return !(ccflags.cf | ccflags.zf);
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case ConditionTests::NotSF:
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return !ccflags.sf;
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case ConditionTests::NotPF:
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return !ccflags.pf;
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case ConditionTests::NotSxOF:
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return !(ccflags.sf ^ ccflags.of);
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case ConditionTests::NotSxOvZF:
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return !((ccflags.sf ^ ccflags.of) | ccflags.zf);
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}
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panic("Unknown condition: %d\n", condition);
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return true;
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}
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}
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