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,
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66 uint64_t _dest, uint64_t _src1, uint64_t _src2) const
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66 uint64_t _dest, uint64_t _src1, uint64_t _src2, 67 bool subtract) const |
68 {
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69 DPRINTF(Sparc, "flagMask = %#x\n", flagMask); |
70 uint64_t flags = oldFlags & ~flagMask;
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69 if(flagMask & CFBit && findCarry(dataSize, _dest, _src1, _src2))
70 flags |= CFBit;
71 if(flagMask & PFBit && findParity(dataSize, _dest))
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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;
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73 if(flagMask & ECFBit && findCarry(dataSize, _dest, _src1, _src2))
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78 if(flagMask & ECFBit && findCarry(dataSize*8, _dest, _src1, _src2)) |
79 flags |= ECFBit;
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75 if(flagMask & AFBit && findCarry(4, _dest, _src1, _src2))
76 flags |= AFBit;
77 if(flagMask & EZFBit && findZero(dataSize, _dest))
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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;
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79 if(flagMask & ZFBit && findZero(dataSize, _dest))
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87 if(flagMask & ZFBit && findZero(dataSize*8, _dest)) |
88 flags |= ZFBit;
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81 if(flagMask & SFBit && findNegative(dataSize, _dest))
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89 if(flagMask & SFBit && findNegative(dataSize*8, _dest)) |
90 flags |= SFBit;
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83 if(flagMask & OFBit && findOverflow(dataSize, _dest, _src1, _src2))
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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 printReg(response, dest, dataSize); 177 response << ", "; 178 printReg(response, src1, dataSize); 179 response << ", "; 180 printReg(response, src2, 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 printReg(response, dest, dataSize); 191 response << ", "; 192 printReg(response, src1, dataSize); 193 ccprintf(response, ", %#x", imm8); 194 return response.str(); 195 } 196}
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