1/* 2 * Copyright (c) 2010 ARM Limited 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 * Copyright (c) 2007-2008 The Florida State University 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Stephen Hines 41 */ 42 43#include "arch/arm/insts/macromem.hh" 44#include "arch/arm/decoder.hh" 45 46using namespace ArmISAInst; 47 48namespace ArmISA 49{ 50 51MacroMemOp::MacroMemOp(const char *mnem, ExtMachInst machInst, 52 OpClass __opClass, IntRegIndex rn, 53 bool index, bool up, bool user, bool writeback, 54 bool load, uint32_t reglist) : 55 PredMacroOp(mnem, machInst, __opClass) 56{ 57 uint32_t regs = reglist; 58 uint32_t ones = number_of_ones(reglist); 59 // Remember that writeback adds a uop 60 numMicroops = ones + (writeback ? 1 : 0) + 1; 61 microOps = new StaticInstPtr[numMicroops]; 62 uint32_t addr = 0; 63 64 if (!up) 65 addr = (ones << 2) - 4; 66 67 if (!index) 68 addr += 4; 69
| 1/* 2 * Copyright (c) 2010 ARM Limited 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 * Copyright (c) 2007-2008 The Florida State University 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Stephen Hines 41 */ 42 43#include "arch/arm/insts/macromem.hh" 44#include "arch/arm/decoder.hh" 45 46using namespace ArmISAInst; 47 48namespace ArmISA 49{ 50 51MacroMemOp::MacroMemOp(const char *mnem, ExtMachInst machInst, 52 OpClass __opClass, IntRegIndex rn, 53 bool index, bool up, bool user, bool writeback, 54 bool load, uint32_t reglist) : 55 PredMacroOp(mnem, machInst, __opClass) 56{ 57 uint32_t regs = reglist; 58 uint32_t ones = number_of_ones(reglist); 59 // Remember that writeback adds a uop 60 numMicroops = ones + (writeback ? 1 : 0) + 1; 61 microOps = new StaticInstPtr[numMicroops]; 62 uint32_t addr = 0; 63 64 if (!up) 65 addr = (ones << 2) - 4; 66 67 if (!index) 68 addr += 4; 69
|
| 70 StaticInstPtr *uop = microOps; 71 StaticInstPtr wbUop; 72 if (writeback) { 73 if (up) { 74 wbUop = new MicroAddiUop(machInst, rn, rn, ones * 4); 75 } else { 76 wbUop = new MicroSubiUop(machInst, rn, rn, ones * 4); 77 } 78 } 79
|
70 // Add 0 to Rn and stick it in ureg0. 71 // This is equivalent to a move.
| 80 // Add 0 to Rn and stick it in ureg0. 81 // This is equivalent to a move.
|
72 microOps[0] = new MicroAddiUop(machInst, INTREG_UREG0, rn, 0);
| 82 *uop = new MicroAddiUop(machInst, INTREG_UREG0, rn, 0);
|
73
| 83
|
| 84 // Write back at the start for loads. This covers the ldm exception return 85 // case where the base needs to be written in the old mode. Stores may need 86 // the original value of the base, but they don't change mode and can 87 // write back at the end like before. 88 if (load && writeback) { 89 *++uop = wbUop; 90 } 91
|
74 unsigned reg = 0; 75 bool force_user = user & !bits(reglist, 15); 76 bool exception_ret = user & bits(reglist, 15); 77
| 92 unsigned reg = 0; 93 bool force_user = user & !bits(reglist, 15); 94 bool exception_ret = user & bits(reglist, 15); 95
|
78 for (int i = 1; i < ones + 1; i++) {
| 96 for (int i = 0; i < ones; i++) {
|
79 // Find the next register. 80 while (!bits(regs, reg)) 81 reg++; 82 replaceBits(regs, reg, 0); 83 84 unsigned regIdx = reg; 85 if (force_user) { 86 regIdx = intRegForceUser(regIdx); 87 } 88 89 if (load) { 90 if (reg == INTREG_PC && exception_ret) { 91 // This must be the exception return form of ldm.
| 97 // Find the next register. 98 while (!bits(regs, reg)) 99 reg++; 100 replaceBits(regs, reg, 0); 101 102 unsigned regIdx = reg; 103 if (force_user) { 104 regIdx = intRegForceUser(regIdx); 105 } 106 107 if (load) { 108 if (reg == INTREG_PC && exception_ret) { 109 // This must be the exception return form of ldm.
|
92 microOps[i] = 93 new MicroLdrRetUop(machInst, regIdx, 94 INTREG_UREG0, up, addr);
| 110 *++uop = new MicroLdrRetUop(machInst, regIdx, 111 INTREG_UREG0, up, addr);
|
95 } else {
| 112 } else {
|
96 microOps[i] = 97 new MicroLdrUop(machInst, regIdx, INTREG_UREG0, up, addr);
| 113 *++uop = new MicroLdrUop(machInst, regIdx, 114 INTREG_UREG0, up, addr);
|
98 } 99 } else {
| 115 } 116 } else {
|
100 microOps[i] = 101 new MicroStrUop(machInst, regIdx, INTREG_UREG0, up, addr);
| 117 *++uop = new MicroStrUop(machInst, regIdx, INTREG_UREG0, up, addr);
|
102 } 103 104 if (up) 105 addr += 4; 106 else 107 addr -= 4; 108 } 109
| 118 } 119 120 if (up) 121 addr += 4; 122 else 123 addr -= 4; 124 } 125
|
110 StaticInstPtr &lastUop = microOps[numMicroops - 1]; 111 if (writeback) { 112 if (up) { 113 lastUop = new MicroAddiUop(machInst, rn, rn, ones * 4); 114 } else { 115 lastUop = new MicroSubiUop(machInst, rn, rn, ones * 4); 116 }
| 126 if (!load && writeback) { 127 *++uop = wbUop;
|
117 }
| 128 }
|
118 lastUop->setLastMicroop();
| 129 130 (*uop)->setLastMicroop();
|
119} 120 121MacroVFPMemOp::MacroVFPMemOp(const char *mnem, ExtMachInst machInst, 122 OpClass __opClass, IntRegIndex rn, 123 RegIndex vd, bool single, bool up, 124 bool writeback, bool load, uint32_t offset) : 125 PredMacroOp(mnem, machInst, __opClass) 126{ 127 const int maxMicroops = 17; 128 microOps = new StaticInstPtr[maxMicroops]; 129 int i = 0; 130 131 // The lowest order bit selects fldmx (set) or fldmd (clear). These seem 132 // to be functionally identical except that fldmx is deprecated. For now 133 // we'll assume they're otherwise interchangable. 134 int count = (single ? offset : (offset / 2)); 135 if (count == 0 || count > NumFloatArchRegs) 136 warn_once("Bad offset field for VFP load/store multiple.\n"); 137 if (count == 0) { 138 // Force there to be at least one microop so the macroop makes sense. 139 writeback = true; 140 } 141 if (count > NumFloatArchRegs) 142 count = NumFloatArchRegs; 143 144 uint32_t addr = 0; 145 146 if (up) 147 addr = -4 * offset; 148 149 for (int j = 0; j < count; j++) { 150 if (load) { 151 microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, 152 true, addr); 153 if (!single) 154 microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, 155 true, addr + 4); 156 } else { 157 microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, 158 true, addr); 159 if (!single) 160 microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, 161 true, addr + 4); 162 } 163 addr += (single ? 4 : 8); 164 } 165 166 if (writeback) { 167 if (up) { 168 microOps[i++] = 169 new MicroAddiUop(machInst, rn, rn, 4 * offset); 170 } else { 171 microOps[i++] = 172 new MicroSubiUop(machInst, rn, rn, 4 * offset); 173 } 174 } 175 176 numMicroops = i; 177 assert(numMicroops <= maxMicroops); 178 microOps[numMicroops - 1]->setLastMicroop(); 179} 180 181}
| 131} 132 133MacroVFPMemOp::MacroVFPMemOp(const char *mnem, ExtMachInst machInst, 134 OpClass __opClass, IntRegIndex rn, 135 RegIndex vd, bool single, bool up, 136 bool writeback, bool load, uint32_t offset) : 137 PredMacroOp(mnem, machInst, __opClass) 138{ 139 const int maxMicroops = 17; 140 microOps = new StaticInstPtr[maxMicroops]; 141 int i = 0; 142 143 // The lowest order bit selects fldmx (set) or fldmd (clear). These seem 144 // to be functionally identical except that fldmx is deprecated. For now 145 // we'll assume they're otherwise interchangable. 146 int count = (single ? offset : (offset / 2)); 147 if (count == 0 || count > NumFloatArchRegs) 148 warn_once("Bad offset field for VFP load/store multiple.\n"); 149 if (count == 0) { 150 // Force there to be at least one microop so the macroop makes sense. 151 writeback = true; 152 } 153 if (count > NumFloatArchRegs) 154 count = NumFloatArchRegs; 155 156 uint32_t addr = 0; 157 158 if (up) 159 addr = -4 * offset; 160 161 for (int j = 0; j < count; j++) { 162 if (load) { 163 microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, 164 true, addr); 165 if (!single) 166 microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, 167 true, addr + 4); 168 } else { 169 microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, 170 true, addr); 171 if (!single) 172 microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, 173 true, addr + 4); 174 } 175 addr += (single ? 4 : 8); 176 } 177 178 if (writeback) { 179 if (up) { 180 microOps[i++] = 181 new MicroAddiUop(machInst, rn, rn, 4 * offset); 182 } else { 183 microOps[i++] = 184 new MicroSubiUop(machInst, rn, rn, 4 * offset); 185 } 186 } 187 188 numMicroops = i; 189 assert(numMicroops <= maxMicroops); 190 microOps[numMicroops - 1]->setLastMicroop(); 191} 192 193}
|