ldstflags.hh revision 5965
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#ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__ 59#define __ARCH_X86_INSTS_MICROLDSTOP_HH__ 60 61#include "arch/x86/insts/microop.hh" 62#include "mem/packet.hh" 63#include "mem/request.hh" 64 65namespace X86ISA 66{ 67 static const Request::FlagsType SegmentFlagMask = mask(4); 68 static const int FlagShift = 4; 69 enum FlagBit { 70 CPL0FlagBit = 1, 71 AddrSizeFlagBit = 2 72 }; 73 74 /** 75 * Base class for load and store ops 76 */ 77 class LdStOp : public X86MicroopBase 78 { 79 protected: 80 const uint8_t scale; 81 const RegIndex index; 82 const RegIndex base; 83 const uint64_t disp; 84 const uint8_t segment; 85 const RegIndex data; 86 const uint8_t dataSize; 87 const uint8_t addressSize; 88 const Request::FlagsType memFlags; 89 RegIndex foldOBit, foldABit; 90 91 //Constructor 92 LdStOp(ExtMachInst _machInst, 93 const char * mnem, const char * _instMnem, 94 bool isMicro, bool isDelayed, bool isFirst, bool isLast, 95 uint8_t _scale, RegIndex _index, RegIndex _base, 96 uint64_t _disp, uint8_t _segment, 97 RegIndex _data, 98 uint8_t _dataSize, uint8_t _addressSize, 99 Request::FlagsType _memFlags, 100 OpClass __opClass) : 101 X86MicroopBase(machInst, mnem, _instMnem, 102 isMicro, isDelayed, isFirst, isLast, __opClass), 103 scale(_scale), index(_index), base(_base), 104 disp(_disp), segment(_segment), 105 data(_data), 106 dataSize(_dataSize), addressSize(_addressSize), 107 memFlags(_memFlags | _segment) 108 { 109 foldOBit = (dataSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0; 110 foldABit = 111 (addressSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0; 112 } 113 114 std::string generateDisassembly(Addr pc, 115 const SymbolTable *symtab) const; 116 117 template<class Context, class MemType> 118 Fault read(Context *xc, Addr EA, MemType & Mem, unsigned flags) const 119 { 120 Fault fault = NoFault; 121 switch(dataSize) 122 { 123 case 1: 124 fault = xc->read(EA, (uint8_t&)Mem, flags); 125 break; 126 case 2: 127 fault = xc->read(EA, (uint16_t&)Mem, flags); 128 break; 129 case 4: 130 fault = xc->read(EA, (uint32_t&)Mem, flags); 131 break; 132 case 8: 133 fault = xc->read(EA, (uint64_t&)Mem, flags); 134 break; 135 default: 136 panic("Bad operand size %d for read at %#x.\n", dataSize, EA); 137 } 138 return fault; 139 } 140 141 template<class Context, class MemType> 142 Fault write(Context *xc, MemType & Mem, Addr EA, unsigned flags) const 143 { 144 Fault fault = NoFault; 145 switch(dataSize) 146 { 147 case 1: 148 fault = xc->write((uint8_t&)Mem, EA, flags, 0); 149 break; 150 case 2: 151 fault = xc->write((uint16_t&)Mem, EA, flags, 0); 152 break; 153 case 4: 154 fault = xc->write((uint32_t&)Mem, EA, flags, 0); 155 break; 156 case 8: 157 fault = xc->write((uint64_t&)Mem, EA, flags, 0); 158 break; 159 default: 160 panic("Bad operand size %d for write at %#x.\n", dataSize, EA); 161 } 162 return fault; 163 } 164 165 uint64_t 166 get(PacketPtr pkt) const 167 { 168 switch(dataSize) 169 { 170 case 1: 171 return pkt->get<uint8_t>(); 172 case 2: 173 return pkt->get<uint16_t>(); 174 case 4: 175 return pkt->get<uint32_t>(); 176 case 8: 177 return pkt->get<uint64_t>(); 178 default: 179 panic("Bad operand size %d for read at %#x.\n", 180 dataSize, pkt->getAddr()); 181 } 182 } 183 }; 184} 185 186#endif //__ARCH_X86_INSTS_MICROLDSTOP_HH__ 187