microop.cc revision 7087:fb8d5786ff30 
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/miscregs.hh"
42
43namespace 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}
122