microregop.cc revision 4804:4a707cb7065b 
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,
67            bool subtract) const
68    {
69        DPRINTF(Sparc, "flagMask = %#x\n", flagMask);
70        uint64_t flags = oldFlags & ~flagMask;
71        if(flagMask & CFBit)
72            if(findCarry(dataSize*8, _dest, _src1, _src2))
73                flags |= CFBit;
74            if(subtract)
75                flags ^= CFBit;
76        if(flagMask & PFBit && findParity(dataSize*8, _dest))
77            flags |= PFBit;
78        if(flagMask & ECFBit && findCarry(dataSize*8, _dest, _src1, _src2))
79            flags |= ECFBit;
80        if(flagMask & AFBit)
81            if(findCarry(4, _dest, _src1, _src2))
82                flags |= AFBit;
83            if(subtract)
84                flags ^= AFBit;
85        if(flagMask & EZFBit && findZero(dataSize*8, _dest))
86            flags |= EZFBit;
87        if(flagMask & ZFBit && findZero(dataSize*8, _dest))
88            flags |= ZFBit;
89        if(flagMask & SFBit && findNegative(dataSize*8, _dest))
90            flags |= SFBit;
91        if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
92            flags |= OFBit;
93        return flags;
94    }
95
96    bool RegOpBase::checkCondition(uint64_t flags) const
97    {
98        CCFlagBits ccflags = flags;
99        switch(ext)
100        {
101          case ConditionTests::True:
102            return true;
103          case ConditionTests::ECF:
104            return ccflags.ECF;
105          case ConditionTests::EZF:
106            return ccflags.EZF;
107          case ConditionTests::SZnZF:
108            return !(!ccflags.EZF & ccflags.ZF);
109          case ConditionTests::MSTRZ:
110            panic("This condition is not implemented!");
111          case ConditionTests::STRZ:
112            panic("This condition is not implemented!");
113          case ConditionTests::MSTRC:
114            panic("This condition is not implemented!");
115          case ConditionTests::STRZnZF:
116            panic("This condition is not implemented!");
117          case ConditionTests::OF:
118            return ccflags.OF;
119          case ConditionTests::CF:
120            return ccflags.CF;
121          case ConditionTests::ZF:
122            return ccflags.ZF;
123          case ConditionTests::CvZF:
124            return ccflags.CF | ccflags.ZF;
125          case ConditionTests::SF:
126            return ccflags.SF;
127          case ConditionTests::PF:
128            return ccflags.PF;
129          case ConditionTests::SxOF:
130            return ccflags.SF ^ ccflags.OF;
131          case ConditionTests::SxOvZF:
132            return ccflags.SF ^ ccflags.OF | ccflags.ZF;
133          case ConditionTests::False:
134            return false;
135          case ConditionTests::NotECF:
136            return !ccflags.ECF;
137          case ConditionTests::NotEZF:
138            return !ccflags.EZF;
139          case ConditionTests::NotSZnZF:
140            return !ccflags.EZF & ccflags.ZF;
141          case ConditionTests::NotMSTRZ:
142            panic("This condition is not implemented!");
143          case ConditionTests::NotSTRZ:
144            panic("This condition is not implemented!");
145          case ConditionTests::NotMSTRC:
146            panic("This condition is not implemented!");
147          case ConditionTests::NotSTRZnZF:
148            panic("This condition is not implemented!");
149          case ConditionTests::NotOF:
150            return !ccflags.OF;
151          case ConditionTests::NotCF:
152            return !ccflags.CF;
153          case ConditionTests::NotZF:
154            return !ccflags.ZF;
155          case ConditionTests::NotCvZF:
156            return !(ccflags.CF | ccflags.ZF);
157          case ConditionTests::NotSF:
158            return !ccflags.SF;
159          case ConditionTests::NotPF:
160            return !ccflags.PF;
161          case ConditionTests::NotSxOF:
162            return !(ccflags.SF ^ ccflags.OF);
163          case ConditionTests::NotSxOvZF:
164            return !(ccflags.SF ^ ccflags.OF | ccflags.ZF);
165        }
166        panic("Unknown condition: %d\n", ext);
167        return true;
168    }
169
170    std::string RegOp::generateDisassembly(Addr pc,
171            const SymbolTable *symtab) const
172    {
173        std::stringstream response;
174
175        printMnemonic(response, instMnem, mnemonic);
176        printDestReg(response, 0, dataSize);
177        response << ", ";
178        printSrcReg(response, 0, dataSize);
179        response << ", ";
180        printSrcReg(response, 1, dataSize);
181        return response.str();
182    }
183
184    std::string RegOpImm::generateDisassembly(Addr pc,
185            const SymbolTable *symtab) const
186    {
187        std::stringstream response;
188
189        printMnemonic(response, instMnem, mnemonic);
190        printDestReg(response, 0, dataSize);
191        response << ", ";
192        printSrcReg(response, 0, dataSize);
193        ccprintf(response, ", %#x", imm8);
194        return response.str();
195    }
196}
197