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microop.cc
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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
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8  * to a hardware implementation of the functionality of the software
9  * licensed hereunder. You may use the software subject to the license
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12  * modified or unmodified, in source code or in binary form.
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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
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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
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31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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36  *
37  * Authors: Gabe Black
38  */
39 
41 
42 #include "arch/x86/regs/misc.hh"
43 
44 namespace X86ISA
45 {
46 
47  bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
48  {
49  CCFlagBits ccflags = flags;
50  switch(condition)
51  {
53  return true;
55  return ccflags.ecf;
57  return ccflags.ezf;
59  return !(!ccflags.ezf && ccflags.zf);
61  panic("This condition is not implemented!");
63  panic("This condition is not implemented!");
65  panic("This condition is not implemented!");
67  return !ccflags.ezf && ccflags.zf;
68  //And no interrupts or debug traps are waiting
69  case ConditionTests::OF:
70  return ccflags.of;
71  case ConditionTests::CF:
72  return ccflags.cf;
73  case ConditionTests::ZF:
74  return ccflags.zf;
76  return ccflags.cf | ccflags.zf;
77  case ConditionTests::SF:
78  return ccflags.sf;
79  case ConditionTests::PF:
80  return ccflags.pf;
82  return ccflags.sf ^ ccflags.of;
84  return (ccflags.sf ^ ccflags.of) | ccflags.zf;
86  return false;
88  return !ccflags.ecf;
90  return !ccflags.ezf;
92  return !ccflags.ezf && ccflags.zf;
94  panic("This condition is not implemented!");
96  panic("This condition is not implemented!");
98  panic("This condition is not implemented!");
100  return !ccflags.ezf && !ccflags.zf;
101  //And no interrupts or debug traps are waiting
103  return !ccflags.of;
105  return !ccflags.cf;
107  return !ccflags.zf;
109  return !(ccflags.cf | ccflags.zf);
111  return !ccflags.sf;
113  return !ccflags.pf;
115  return !(ccflags.sf ^ ccflags.of);
117  return !((ccflags.sf ^ ccflags.of) | ccflags.zf);
118  }
119  panic("Unknown condition: %d\n", condition);
120  return true;
121  }
122 }
#define panic(...)
Definition: misc.hh:153
std::bitset< Num_Flags > flags
Flag values for this instruction.
Definition: static_inst.hh:84
bool checkCondition(uint64_t flags, int condition) const
Definition: microop.cc:47

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