pred_inst.hh revision 6253
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_INSTS_PREDINST_HH__ 30#define __ARCH_ARM_INSTS_PREDINST_HH__ 31 32#include "arch/arm/insts/static_inst.hh" 33#include "base/trace.hh" 34 35namespace ArmISA 36{ 37static inline uint32_t 38rotate_imm(uint32_t immValue, int rotateValue) 39{ 40 return ((immValue >> (rotateValue & 31)) | 41 (immValue << (32 - (rotateValue & 31)))); 42} 43 44/** 45 * Base class for predicated integer operations. 46 */ 47class PredOp : public ArmStaticInst 48{ 49 protected: 50 51 ConditionCode condCode; 52 53 /// Constructor 54 PredOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 55 ArmStaticInst(mnem, _machInst, __opClass), 56 condCode((ConditionCode)(unsigned)machInst.condCode) 57 { 58 } 59 60 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 61}; 62 63/** 64 * Base class for predicated immediate operations. 65 */ 66class PredImmOp : public PredOp 67{ 68 protected: 69 70 uint32_t imm; 71 uint32_t rotate; 72 uint32_t rotated_imm; 73 uint32_t rotated_carry; 74 75 /// Constructor 76 PredImmOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 77 PredOp(mnem, _machInst, __opClass), 78 imm(machInst.imm), rotate(machInst.rotate << 1), 79 rotated_imm(0), rotated_carry(0) 80 { 81 rotated_imm = rotate_imm(imm, rotate); 82 if (rotate != 0) 83 rotated_carry = (rotated_imm >> 31) & 1; 84 } 85 86 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 87}; 88 89/** 90 * Base class for predicated integer operations. 91 */ 92class PredIntOp : public PredOp 93{ 94 protected: 95 96 uint32_t shift_size; 97 uint32_t shift; 98 99 /// Constructor 100 PredIntOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 101 PredOp(mnem, _machInst, __opClass), 102 shift_size(machInst.shiftSize), shift(machInst.shift) 103 { 104 } 105 106 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 107}; 108 109/** 110 * Base class for predicated macro-operations. 111 */ 112class PredMacroOp : public PredOp 113{ 114 protected: 115 116 uint32_t numMicroops; 117 StaticInstPtr * microOps; 118 119 /// Constructor 120 PredMacroOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 121 PredOp(mnem, _machInst, __opClass), 122 numMicroops(0) 123 { 124 // We rely on the subclasses of this object to handle the 125 // initialization of the micro-operations, since they are 126 // all of variable length 127 flags[IsMacroop] = true; 128 } 129 130 ~PredMacroOp() 131 { 132 if (numMicroops) 133 delete [] microOps; 134 } 135 136 StaticInstPtr 137 fetchMicroop(MicroPC microPC) 138 { 139 assert(microPC < numMicroops); 140 return microOps[microPC]; 141 } 142 143 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 144}; 145 146/** 147 * Base class for predicated micro-operations. 148 */ 149class PredMicroop : public PredOp 150{ 151 /// Constructor 152 PredMicroop(const char *mnem, MachInst _machInst, OpClass __opClass) : 153 PredOp(mnem, _machInst, __opClass) 154 { 155 flags[IsMicroop] = true; 156 } 157}; 158} 159 160#endif //__ARCH_ARM_INSTS_PREDINST_HH__ 161