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. 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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(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