microregop.cc revision 7676:92274350b953
1/* 2 * Copyright (c) 2007 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Gabe Black 38 */ 39 40#include <string> 41 42#include "arch/x86/insts/microregop.hh" 43#include "arch/x86/regs/misc.hh" 44#include "base/condcodes.hh" 45 46namespace X86ISA 47{ 48 uint64_t RegOpBase::genFlags(uint64_t oldFlags, uint64_t flagMask, 49 uint64_t _dest, uint64_t _src1, uint64_t _src2, 50 bool subtract) const 51 { 52 DPRINTF(X86, "flagMask = %#x\n", flagMask); 53 if (_destRegIdx[0] & IntFoldBit) { 54 _dest >>= 8; 55 } 56 uint64_t flags = oldFlags & ~flagMask; 57 if(flagMask & (ECFBit | CFBit)) 58 { 59 if(findCarry(dataSize*8, _dest, _src1, _src2)) 60 flags |= (flagMask & (ECFBit | CFBit)); 61 if(subtract) 62 flags ^= (flagMask & (ECFBit | CFBit)); 63 } 64 if(flagMask & PFBit && !findParity(8, _dest)) 65 flags |= PFBit; 66 if(flagMask & AFBit) 67 { 68 if(findCarry(4, _dest, _src1, _src2)) 69 flags |= AFBit; 70 if(subtract) 71 flags ^= AFBit; 72 } 73 if(flagMask & (EZFBit | ZFBit) && findZero(dataSize*8, _dest)) 74 flags |= (flagMask & (EZFBit | ZFBit)); 75 if(flagMask & SFBit && findNegative(dataSize*8, _dest)) 76 flags |= SFBit; 77 if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2)) 78 flags |= OFBit; 79 return flags; 80 } 81 82 std::string RegOp::generateDisassembly(Addr pc, 83 const SymbolTable *symtab) const 84 { 85 std::stringstream response; 86 87 printMnemonic(response, instMnem, mnemonic); 88 printDestReg(response, 0, dataSize); 89 response << ", "; 90 printSrcReg(response, 0, dataSize); 91 response << ", "; 92 printSrcReg(response, 1, dataSize); 93 return response.str(); 94 } 95 96 std::string RegOpImm::generateDisassembly(Addr pc, 97 const SymbolTable *symtab) const 98 { 99 std::stringstream response; 100 101 printMnemonic(response, instMnem, mnemonic); 102 printDestReg(response, 0, dataSize); 103 response << ", "; 104 printSrcReg(response, 0, dataSize); 105 ccprintf(response, ", %#x", imm8); 106 return response.str(); 107 } 108} 109