mem.hh revision 6307:067515d22824
1/* Copyright (c) 2007-2008 The Florida State University 2 * All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer; 8 * redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution; 11 * neither the name of the copyright holders nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Authors: Stephen Hines 28 */ 29#ifndef __ARCH_ARM_MEM_HH__ 30#define __ARCH_ARM_MEM_HH__ 31 32#include "arch/arm/insts/pred_inst.hh" 33 34namespace ArmISA 35{ 36/** 37 * Base class for general Arm memory-format instructions. 38 */ 39class Memory : public PredOp 40{ 41 protected: 42 43 /// Memory request flags. See mem_req_base.hh. 44 unsigned memAccessFlags; 45 46 /// Displacement for EA calculation (signed). 47 int32_t disp; 48 int32_t disp8; 49 int32_t up; 50 int32_t hilo, 51 shift_size, 52 shift; 53 54 /// Constructor 55 Memory(const char *mnem, ExtMachInst _machInst, OpClass __opClass) 56 : PredOp(mnem, _machInst, __opClass), 57 memAccessFlags(0), 58 disp(machInst.immed11_0), 59 disp8(machInst.immed7_0 << 2), 60 up(machInst.puswl.up), 61 hilo((machInst.immedHi11_8 << 4) | machInst.immedLo3_0), 62 shift_size(machInst.shiftSize), shift(machInst.shift) 63 { 64 } 65 66 std::string 67 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 68 69 virtual void 70 printOffset(std::ostream &os) const 71 {} 72}; 73 74class MemoryDisp : public Memory 75{ 76 protected: 77 /// Constructor 78 MemoryDisp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) 79 : Memory(mnem, _machInst, __opClass) 80 { 81 } 82 83 void 84 printOffset(std::ostream &os) const 85 { 86 ccprintf(os, "#%#x", (machInst.puswl.up ? disp : -disp)); 87 } 88}; 89 90class MemoryHilo : public Memory 91{ 92 protected: 93 /// Constructor 94 MemoryHilo(const char *mnem, ExtMachInst _machInst, OpClass __opClass) 95 : Memory(mnem, _machInst, __opClass) 96 { 97 } 98 99 void 100 printOffset(std::ostream &os) const 101 { 102 ccprintf(os, "#%#x", (machInst.puswl.up ? hilo : -hilo)); 103 } 104}; 105 106class MemoryShift : public Memory 107{ 108 protected: 109 /// Constructor 110 MemoryShift(const char *mnem, ExtMachInst _machInst, OpClass __opClass) 111 : Memory(mnem, _machInst, __opClass) 112 { 113 } 114 115 void 116 printOffset(std::ostream &os) const 117 { 118 printShiftOperand(os); 119 } 120}; 121 122class MemoryReg : public Memory 123{ 124 protected: 125 /// Constructor 126 MemoryReg(const char *mnem, ExtMachInst _machInst, OpClass __opClass) 127 : Memory(mnem, _machInst, __opClass) 128 { 129 } 130 131 void 132 printOffset(std::ostream &os) const 133 { 134 os << (machInst.puswl.up ? "+ " : "- "); 135 printReg(os, machInst.rm); 136 } 137}; 138} 139 140#endif //__ARCH_ARM_INSTS_MEM_HH__ 141