microregop.cc revision 6361:62de7e765286 
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
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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
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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(X86, "flagMask = %#x\n", flagMask);
70        if (_destRegIdx[0] & IntFoldBit) {
71            _dest >>= 8;
72        }
73        uint64_t flags = oldFlags & ~flagMask;
74        if(flagMask & (ECFBit | CFBit))
75        {
76            if(findCarry(dataSize*8, _dest, _src1, _src2))
77                flags |= (flagMask & (ECFBit | CFBit));
78            if(subtract)
79                flags ^= (flagMask & (ECFBit | CFBit));
80        }
81        if(flagMask & PFBit && findParity(dataSize*8, _dest))
82            flags |= PFBit;
83        if(flagMask & AFBit)
84        {
85            if(findCarry(4, _dest, _src1, _src2))
86                flags |= AFBit;
87            if(subtract)
88                flags ^= AFBit;
89        }
90        if(flagMask & (EZFBit | ZFBit) && findZero(dataSize*8, _dest))
91            flags |= (flagMask & (EZFBit | ZFBit));
92        if(flagMask & SFBit && findNegative(dataSize*8, _dest))
93            flags |= SFBit;
94        if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
95            flags |= OFBit;
96        return flags;
97    }
98
99    std::string RegOp::generateDisassembly(Addr pc,
100            const SymbolTable *symtab) const
101    {
102        std::stringstream response;
103
104        printMnemonic(response, instMnem, mnemonic);
105        printDestReg(response, 0, dataSize);
106        response << ", ";
107        printSrcReg(response, 0, dataSize);
108        response << ", ";
109        printSrcReg(response, 1, dataSize);
110        return response.str();
111    }
112
113    std::string RegOpImm::generateDisassembly(Addr pc,
114            const SymbolTable *symtab) const
115    {
116        std::stringstream response;
117
118        printMnemonic(response, instMnem, mnemonic);
119        printDestReg(response, 0, dataSize);
120        response << ", ";
121        printSrcReg(response, 0, dataSize);
122        ccprintf(response, ", %#x", imm8);
123        return response.str();
124    }
125}
126