microregop.cc revision 4688:82d7cbf0e66d 
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/microregop.hh"
59#include "arch/x86/miscregs.hh"
60#include "base/condcodes.hh"
61#include <string>
62
63namespace X86ISA
64{
65    uint64_t RegOpBase::genFlags(uint64_t oldFlags, uint64_t flagMask,
66            uint64_t _dest, uint64_t _src1, uint64_t _src2) const
67    {
68        uint64_t flags = oldFlags & ~flagMask;
69        if(flagMask & CFBit && findCarry(dataSize, _dest, _src1, _src2))
70            flags |= CFBit;
71        if(flagMask & PFBit && findParity(dataSize, _dest))
72            flags |= PFBit;
73        if(flagMask & ECFBit && findCarry(dataSize, _dest, _src1, _src2))
74            flags |= ECFBit;
75        if(flagMask & AFBit && findCarry(4, _dest, _src1, _src2))
76            flags |= AFBit;
77        if(flagMask & EZFBit && findZero(dataSize, _dest))
78            flags |= EZFBit;
79        if(flagMask & ZFBit && findZero(dataSize, _dest))
80            flags |= ZFBit;
81        if(flagMask & SFBit && findNegative(dataSize, _dest))
82            flags |= SFBit;
83        if(flagMask & OFBit && findOverflow(dataSize, _dest, _src1, _src2))
84            flags |= OFBit;
85        return flags;
86    }
87
88    bool RegOpBase::checkCondition(uint64_t flags) const
89    {
90        CCFlagBits ccflags = flags;
91        switch(ext)
92        {
93          case ConditionTests::True:
94            return true;
95          case ConditionTests::ECF:
96            return ccflags.ECF;
97          case ConditionTests::EZF:
98            return ccflags.EZF;
99          case ConditionTests::SZnZF:
100            return !(!ccflags.EZF & ccflags.ZF);
101          case ConditionTests::MSTRZ:
102            panic("This condition is not implemented!");
103          case ConditionTests::STRZ:
104            panic("This condition is not implemented!");
105          case ConditionTests::MSTRC:
106            panic("This condition is not implemented!");
107          case ConditionTests::STRZnZF:
108            panic("This condition is not implemented!");
109          case ConditionTests::OF:
110            return ccflags.OF;
111          case ConditionTests::CF:
112            return ccflags.CF;
113          case ConditionTests::ZF:
114            return ccflags.ZF;
115          case ConditionTests::CvZF:
116            return ccflags.CF | ccflags.ZF;
117          case ConditionTests::SF:
118            return ccflags.SF;
119          case ConditionTests::PF:
120            return ccflags.PF;
121          case ConditionTests::SxOF:
122            return ccflags.SF ^ ccflags.OF;
123          case ConditionTests::SxOvZF:
124            return ccflags.SF ^ ccflags.OF | ccflags.ZF;
125          case ConditionTests::False:
126            return false;
127          case ConditionTests::NotECF:
128            return !ccflags.ECF;
129          case ConditionTests::NotEZF:
130            return !ccflags.EZF;
131          case ConditionTests::NotSZnZF:
132            return !ccflags.EZF & ccflags.ZF;
133          case ConditionTests::NotMSTRZ:
134            panic("This condition is not implemented!");
135          case ConditionTests::NotSTRZ:
136            panic("This condition is not implemented!");
137          case ConditionTests::NotMSTRC:
138            panic("This condition is not implemented!");
139          case ConditionTests::NotSTRZnZF:
140            panic("This condition is not implemented!");
141          case ConditionTests::NotOF:
142            return !ccflags.OF;
143          case ConditionTests::NotCF:
144            return !ccflags.CF;
145          case ConditionTests::NotZF:
146            return !ccflags.ZF;
147          case ConditionTests::NotCvZF:
148            return !(ccflags.CF | ccflags.ZF);
149          case ConditionTests::NotSF:
150            return !ccflags.SF;
151          case ConditionTests::NotPF:
152            return !ccflags.PF;
153          case ConditionTests::NotSxOF:
154            return !(ccflags.SF ^ ccflags.OF);
155          case ConditionTests::NotSxOvZF:
156            return !(ccflags.SF ^ ccflags.OF | ccflags.ZF);
157        }
158        panic("Unknown condition: %d\n", ext);
159        return true;
160    }
161
162    std::string RegOp::generateDisassembly(Addr pc,
163            const SymbolTable *symtab) const
164    {
165        std::stringstream response;
166
167        printMnemonic(response, instMnem, mnemonic);
168        printReg(response, dest);
169        response << ", ";
170        printReg(response, src1);
171        response << ", ";
172        printReg(response, src2);
173        return response.str();
174    }
175
176    std::string RegOpImm::generateDisassembly(Addr pc,
177            const SymbolTable *symtab) const
178    {
179        std::stringstream response;
180
181        printMnemonic(response, instMnem, mnemonic);
182        printReg(response, dest);
183        response << ", ";
184        printReg(response, src1);
185        ccprintf(response, ", %#x", imm8);
186        return response.str();
187    }
188}
189