pred_inst.hh revision 6264:588457e03a81
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 87/** 88 * Base class for predicated integer operations. 89 */ 90class PredIntOp : public PredOp 91{ 92 protected: 93 94 uint32_t shift_size; 95 uint32_t shift; 96 97 /// Constructor 98 PredIntOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 99 PredOp(mnem, _machInst, __opClass), 100 shift_size(machInst.shiftSize), shift(machInst.shift) 101 { 102 } 103}; 104 105/** 106 * Base class for predicated macro-operations. 107 */ 108class PredMacroOp : public PredOp 109{ 110 protected: 111 112 uint32_t numMicroops; 113 StaticInstPtr * microOps; 114 115 /// Constructor 116 PredMacroOp(const char *mnem, MachInst _machInst, OpClass __opClass) : 117 PredOp(mnem, _machInst, __opClass), 118 numMicroops(0) 119 { 120 // We rely on the subclasses of this object to handle the 121 // initialization of the micro-operations, since they are 122 // all of variable length 123 flags[IsMacroop] = true; 124 } 125 126 ~PredMacroOp() 127 { 128 if (numMicroops) 129 delete [] microOps; 130 } 131 132 StaticInstPtr 133 fetchMicroop(MicroPC microPC) 134 { 135 assert(microPC < numMicroops); 136 return microOps[microPC]; 137 } 138 139 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 140}; 141 142/** 143 * Base class for predicated micro-operations. 144 */ 145class PredMicroop : public PredOp 146{ 147 /// Constructor 148 PredMicroop(const char *mnem, MachInst _machInst, OpClass __opClass) : 149 PredOp(mnem, _machInst, __opClass) 150 { 151 flags[IsMicroop] = true; 152 } 153}; 154} 155 156#endif //__ARCH_ARM_INSTS_PREDINST_HH__ 157