pred.isa revision 6271
1// -*- mode:c++ -*- 2 3// Copyright (c) 2007-2008 The Florida State University 4// All rights reserved. 5// 6// Redistribution and use in source and binary forms, with or without 7// modification, are permitted provided that the following conditions are 8// met: redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer; 10// redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution; 13// neither the name of the copyright holders nor the names of its 14// contributors may be used to endorse or promote products derived from 15// this software without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28// 29// Authors: Stephen Hines 30 31//////////////////////////////////////////////////////////////////// 32// 33// Predicated Instruction Execution 34// 35 36let {{ 37 predicateTest = 'testPredicate(Cpsr, condCode)' 38}}; 39 40def template PredOpExecute {{ 41 Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const 42 { 43 Fault fault = NoFault; 44 uint64_t resTemp = 0; 45 resTemp = resTemp; 46 %(op_decl)s; 47 %(op_rd)s; 48 49 if (%(predicate_test)s) 50 { 51 %(code)s; 52 if (fault == NoFault) 53 { 54 %(op_wb)s; 55 } 56 } 57 58 return fault; 59 } 60}}; 61 62def template DataDecode {{ 63 if (machInst.opcode4 == 0) { 64 if (machInst.sField == 0) 65 return new %(class_name)sImm(machInst); 66 else 67 return new %(class_name)sImmCc(machInst); 68 } else { 69 if (machInst.sField == 0) 70 return new %(class_name)s(machInst); 71 else 72 return new %(class_name)sCc(machInst); 73 } 74}}; 75 76def template DataImmDecode {{ 77 if (machInst.sField == 0) 78 return new %(class_name)s(machInst); 79 else 80 return new %(class_name)sCc(machInst); 81}}; 82 83let {{ 84 85 calcCcCode = ''' 86 uint16_t _ic, _iv, _iz, _in; 87 88 _in = (resTemp >> 31) & 1; 89 _iz = (resTemp == 0); 90 _iv = %(ivValue)s & 1; 91 _ic = %(icValue)s & 1; 92 93 Cpsr = _in << 31 | _iz << 30 | _ic << 29 | _iv << 28 | 94 (Cpsr & 0x0FFFFFFF); 95 96 DPRINTF(Arm, "in = %%d\\n", _in); 97 DPRINTF(Arm, "iz = %%d\\n", _iz); 98 DPRINTF(Arm, "ic = %%d\\n", _ic); 99 DPRINTF(Arm, "iv = %%d\\n", _iv); 100 ''' 101 102}}; 103 104def format DataOp(code, icValue, ivValue) {{ 105 regCode = re.sub(r'op2', 'shift_rm_rs(Rm, Rs, \ 106 shift, Cpsr<29:0>)', code) 107 immCode = re.sub(r'op2', 'shift_rm_imm(Rm, shift_size, \ 108 shift, Cpsr<29:0>)', code) 109 regIop = InstObjParams(name, Name, 'PredIntOp', 110 {"code": regCode, 111 "predicate_test": predicateTest}) 112 immIop = InstObjParams(name, Name + "Imm", 'PredIntOp', 113 {"code": immCode, 114 "predicate_test": predicateTest}) 115 regCcIop = InstObjParams(name, Name + "Cc", 'PredIntOp', 116 {"code": regCode + calcCcCode % vars(), 117 "predicate_test": predicateTest}) 118 immCcIop = InstObjParams(name, Name + "ImmCc", 'PredIntOp', 119 {"code": immCode + calcCcCode % vars(), 120 "predicate_test": predicateTest}) 121 header_output = BasicDeclare.subst(regIop) + \ 122 BasicDeclare.subst(immIop) + \ 123 BasicDeclare.subst(regCcIop) + \ 124 BasicDeclare.subst(immCcIop) 125 decoder_output = BasicConstructor.subst(regIop) + \ 126 BasicConstructor.subst(immIop) + \ 127 BasicConstructor.subst(regCcIop) + \ 128 BasicConstructor.subst(immCcIop) 129 exec_output = PredOpExecute.subst(regIop) + \ 130 PredOpExecute.subst(immIop) + \ 131 PredOpExecute.subst(regCcIop) + \ 132 PredOpExecute.subst(immCcIop) 133 decode_block = DataDecode.subst(regIop) 134}}; 135 136def format DataImmOp(code, icValue, ivValue) {{ 137 code += "resTemp = resTemp;" 138 iop = InstObjParams(name, Name, 'PredImmOp', 139 {"code": code, 140 "predicate_test": predicateTest}) 141 ccIop = InstObjParams(name, Name + "Cc", 'PredImmOp', 142 {"code": code + calcCcCode % vars(), 143 "predicate_test": predicateTest}) 144 header_output = BasicDeclare.subst(iop) + \ 145 BasicDeclare.subst(ccIop) 146 decoder_output = BasicConstructor.subst(iop) + \ 147 BasicConstructor.subst(ccIop) 148 exec_output = PredOpExecute.subst(iop) + \ 149 PredOpExecute.subst(ccIop) 150 decode_block = DataImmDecode.subst(iop) 151}}; 152 153def format PredOp(code, *opt_flags) {{ 154 iop = InstObjParams(name, Name, 'PredOp', 155 {"code": code, 156 "predicate_test": predicateTest}, 157 opt_flags) 158 header_output = BasicDeclare.subst(iop) 159 decoder_output = BasicConstructor.subst(iop) 160 decode_block = BasicDecode.subst(iop) 161 exec_output = PredOpExecute.subst(iop) 162}}; 163 164def format PredImmOp(code, *opt_flags) {{ 165 iop = InstObjParams(name, Name, 'PredImmOp', 166 {"code": code, 167 "predicate_test": predicateTest}, 168 opt_flags) 169 header_output = BasicDeclare.subst(iop) 170 decoder_output = BasicConstructor.subst(iop) 171 decode_block = BasicDecode.subst(iop) 172 exec_output = PredOpExecute.subst(iop) 173}}; 174 175def format PredImmOpCc(code, icValue, ivValue, *opt_flags) {{ 176 ccCode = calcCcCode % vars() 177 code += ccCode; 178 iop = InstObjParams(name, Name, 'PredImmOp', 179 {"code": code, 180 "cc_code": ccCode, 181 "predicate_test": predicateTest}, 182 opt_flags) 183 header_output = BasicDeclare.subst(iop) 184 decoder_output = BasicConstructor.subst(iop) 185 decode_block = BasicDecode.subst(iop) 186 exec_output = PredOpExecute.subst(iop) 187}}; 188 189def format PredIntOp(code, *opt_flags) {{ 190 new_code = ArmGenericCodeSubs(code) 191 iop = InstObjParams(name, Name, 'PredIntOp', 192 {"code": new_code, 193 "predicate_test": predicateTest}, 194 opt_flags) 195 header_output = BasicDeclare.subst(iop) 196 decoder_output = BasicConstructor.subst(iop) 197 decode_block = BasicDecode.subst(iop) 198 exec_output = PredOpExecute.subst(iop) 199}}; 200 201def format PredIntOpCc(code, icValue, ivValue, *opt_flags) {{ 202 ccCode = calcCcCode % vars() 203 code += ccCode; 204 new_code = ArmGenericCodeSubs(code) 205 iop = InstObjParams(name, Name, 'PredIntOp', 206 {"code": new_code, 207 "cc_code": ccCode, 208 "predicate_test": predicateTest}, 209 opt_flags) 210 header_output = BasicDeclare.subst(iop) 211 decoder_output = BasicConstructor.subst(iop) 212 decode_block = BasicDecode.subst(iop) 213 exec_output = PredOpExecute.subst(iop) 214}}; 215 216