microop.cc revision 5083:49559a8060e8 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use.  Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 *     Director of Intellectual Property Licensing
21 *     Office of Strategy and Technology
22 *     Hewlett-Packard Company
23 *     1501 Page Mill Road
24 *     Palo Alto, California  94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer.  Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
30 * other materials provided with the distribution.  Neither the name of
31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission.  No right of
34 * sublicense is granted herewith.  Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses.  Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#include "arch/x86/insts/microop.hh"
59#include "arch/x86/miscregs.hh"
60
61namespace X86ISA
62{
63
64    bool X86MicroopBase::checkCondition(uint64_t flags, int condition) const
65    {
66        CCFlagBits ccflags = flags;
67        switch(condition)
68        {
69          case ConditionTests::True:
70            return true;
71          case ConditionTests::ECF:
72            return ccflags.ECF;
73          case ConditionTests::EZF:
74            return ccflags.EZF;
75          case ConditionTests::SZnZF:
76            return !(!ccflags.EZF & ccflags.ZF);
77          case ConditionTests::MSTRZ:
78            panic("This condition is not implemented!");
79          case ConditionTests::STRZ:
80            panic("This condition is not implemented!");
81          case ConditionTests::MSTRC:
82            panic("This condition is not implemented!");
83          case ConditionTests::STRZnEZF:
84            return !ccflags.EZF & ccflags.ZF;
85                //And no interrupts or debug traps are waiting
86          case ConditionTests::OF:
87            return ccflags.OF;
88          case ConditionTests::CF:
89            return ccflags.CF;
90          case ConditionTests::ZF:
91            return ccflags.ZF;
92          case ConditionTests::CvZF:
93            return ccflags.CF | ccflags.ZF;
94          case ConditionTests::SF:
95            return ccflags.SF;
96          case ConditionTests::PF:
97            return ccflags.PF;
98          case ConditionTests::SxOF:
99            return ccflags.SF ^ ccflags.OF;
100          case ConditionTests::SxOvZF:
101            return ccflags.SF ^ ccflags.OF | ccflags.ZF;
102          case ConditionTests::False:
103            return false;
104          case ConditionTests::NotECF:
105            return !ccflags.ECF;
106          case ConditionTests::NotEZF:
107            return !ccflags.EZF;
108          case ConditionTests::NotSZnZF:
109            return !ccflags.EZF & ccflags.ZF;
110          case ConditionTests::NotMSTRZ:
111            panic("This condition is not implemented!");
112          case ConditionTests::NotSTRZ:
113            panic("This condition is not implemented!");
114          case ConditionTests::NotMSTRC:
115            panic("This condition is not implemented!");
116          case ConditionTests::STRnZnEZF:
117            return !ccflags.EZF & !ccflags.ZF;
118                //And no interrupts or debug traps are waiting
119          case ConditionTests::NotOF:
120            return !ccflags.OF;
121          case ConditionTests::NotCF:
122            return !ccflags.CF;
123          case ConditionTests::NotZF:
124            return !ccflags.ZF;
125          case ConditionTests::NotCvZF:
126            return !(ccflags.CF | ccflags.ZF);
127          case ConditionTests::NotSF:
128            return !ccflags.SF;
129          case ConditionTests::NotPF:
130            return !ccflags.PF;
131          case ConditionTests::NotSxOF:
132            return !(ccflags.SF ^ ccflags.OF);
133          case ConditionTests::NotSxOvZF:
134            return !(ccflags.SF ^ ccflags.OF | ccflags.ZF);
135        }
136        panic("Unknown condition: %d\n", condition);
137        return true;
138    }
139}
140