src/arch/x86/insts/microop.cc

   1 /*
   2  * Copyright (c) 2007 The Hewlett-Packard Development Company
   3  * All rights reserved.
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: Gabe Black
  38  */
  39
  40 #include "arch/x86/insts/microop.hh"
  41 #include "arch/x86/regs/misc.hh"
  42
  43 namespace X86ISA
  44 {
  45
  46     bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
  47     {
  48         CCFlagBits ccflags = flags;
  49         switch(condition)
  50         {
  51           case ConditionTests::True:
  52             return true;
  53           case ConditionTests::ECF:
  54             return ccflags.ecf;
  55           case ConditionTests::EZF:
  56             return ccflags.ezf;
  57           case ConditionTests::SZnZF:
  58             return !(!ccflags.ezf && ccflags.zf);
  59           case ConditionTests::MSTRZ:
  60             panic("This condition is not implemented!");
  61           case ConditionTests::STRZ:
  62             panic("This condition is not implemented!");
  63           case ConditionTests::MSTRC:
  64             panic("This condition is not implemented!");
  65           case ConditionTests::STRZnEZF:
  66             return !ccflags.ezf && ccflags.zf;
  67                 //And no interrupts or debug traps are waiting
  68           case ConditionTests::OF:
  69             return ccflags.of;
  70           case ConditionTests::CF:
  71             return ccflags.cf;
  72           case ConditionTests::ZF:
  73             return ccflags.zf;
  74           case ConditionTests::CvZF:
  75             return ccflags.cf | ccflags.zf;
  76           case ConditionTests::SF:
  77             return ccflags.sf;
  78           case ConditionTests::PF:
  79             return ccflags.pf;
  80           case ConditionTests::SxOF:
  81             return ccflags.sf ^ ccflags.of;
  82           case ConditionTests::SxOvZF:
  83             return (ccflags.sf ^ ccflags.of) | ccflags.zf;
  84           case ConditionTests::False:
  85             return false;
  86           case ConditionTests::NotECF:
  87             return !ccflags.ecf;
  88           case ConditionTests::NotEZF:
  89             return !ccflags.ezf;
  90           case ConditionTests::NotSZnZF:
  91             return !ccflags.ezf && ccflags.zf;
  92           case ConditionTests::NotMSTRZ:
  93             panic("This condition is not implemented!");
  94           case ConditionTests::NotSTRZ:
  95             panic("This condition is not implemented!");
  96           case ConditionTests::NotMSTRC:
  97             panic("This condition is not implemented!");
  98           case ConditionTests::STRnZnEZF:
  99             return !ccflags.ezf && !ccflags.zf;
 100                 //And no interrupts or debug traps are waiting
 101           case ConditionTests::NotOF:
 102             return !ccflags.of;
 103           case ConditionTests::NotCF:
 104             return !ccflags.cf;
 105           case ConditionTests::NotZF:
 106             return !ccflags.zf;
 107           case ConditionTests::NotCvZF:
 108             return !(ccflags.cf | ccflags.zf);
 109           case ConditionTests::NotSF:
 110             return !ccflags.sf;
 111           case ConditionTests::NotPF:
 112             return !ccflags.pf;
 113           case ConditionTests::NotSxOF:
 114             return !(ccflags.sf ^ ccflags.of);
 115           case ConditionTests::NotSxOvZF:
 116             return !((ccflags.sf ^ ccflags.of) | ccflags.zf);
 117         }
 118         panic("Unknown condition: %d\n", condition);
 119         return true;
 120     }
 121 }