pred.isa revision 6272
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 = '''uint32_t op2 = shift_rm_rs(Rm, Rs, 106 shift, Cpsr<29:0>); 107 op2 = op2;''' + code 108 immCode = '''uint32_t op2 = shift_rm_imm(Rm, shift_size, 109 shift, Cpsr<29:0>); 110 op2 = op2;''' + code 111 regIop = InstObjParams(name, Name, 'PredIntOp', 112 {"code": regCode, 113 "predicate_test": predicateTest}) 114 immIop = InstObjParams(name, Name + "Imm", 'PredIntOp', 115 {"code": immCode, 116 "predicate_test": predicateTest}) 117 regCcIop = InstObjParams(name, Name + "Cc", 'PredIntOp', 118 {"code": regCode + calcCcCode % vars(), 119 "predicate_test": predicateTest}) 120 immCcIop = InstObjParams(name, Name + "ImmCc", 'PredIntOp', 121 {"code": immCode + calcCcCode % vars(), 122 "predicate_test": predicateTest}) 123 header_output = BasicDeclare.subst(regIop) + \ 124 BasicDeclare.subst(immIop) + \ 125 BasicDeclare.subst(regCcIop) + \ 126 BasicDeclare.subst(immCcIop) 127 decoder_output = BasicConstructor.subst(regIop) + \ 128 BasicConstructor.subst(immIop) + \ 129 BasicConstructor.subst(regCcIop) + \ 130 BasicConstructor.subst(immCcIop) 131 exec_output = PredOpExecute.subst(regIop) + \ 132 PredOpExecute.subst(immIop) + \ 133 PredOpExecute.subst(regCcIop) + \ 134 PredOpExecute.subst(immCcIop) 135 decode_block = DataDecode.subst(regIop) 136}}; 137 138def format DataImmOp(code, icValue, ivValue) {{ 139 code += "resTemp = resTemp;" 140 iop = InstObjParams(name, Name, 'PredImmOp', 141 {"code": code, 142 "predicate_test": predicateTest}) 143 ccIop = InstObjParams(name, Name + "Cc", 'PredImmOp', 144 {"code": code + calcCcCode % vars(), 145 "predicate_test": predicateTest}) 146 header_output = BasicDeclare.subst(iop) + \ 147 BasicDeclare.subst(ccIop) 148 decoder_output = BasicConstructor.subst(iop) + \ 149 BasicConstructor.subst(ccIop) 150 exec_output = PredOpExecute.subst(iop) + \ 151 PredOpExecute.subst(ccIop) 152 decode_block = DataImmDecode.subst(iop) 153}}; 154 155def format PredOp(code, *opt_flags) {{ 156 iop = InstObjParams(name, Name, 'PredOp', 157 {"code": code, 158 "predicate_test": predicateTest}, 159 opt_flags) 160 header_output = BasicDeclare.subst(iop) 161 decoder_output = BasicConstructor.subst(iop) 162 decode_block = BasicDecode.subst(iop) 163 exec_output = PredOpExecute.subst(iop) 164}}; 165 166def format PredImmOp(code, *opt_flags) {{ 167 iop = InstObjParams(name, Name, 'PredImmOp', 168 {"code": code, 169 "predicate_test": predicateTest}, 170 opt_flags) 171 header_output = BasicDeclare.subst(iop) 172 decoder_output = BasicConstructor.subst(iop) 173 decode_block = BasicDecode.subst(iop) 174 exec_output = PredOpExecute.subst(iop) 175}}; 176 177def format PredImmOpCc(code, icValue, ivValue, *opt_flags) {{ 178 ccCode = calcCcCode % vars() 179 code += ccCode; 180 iop = InstObjParams(name, Name, 'PredImmOp', 181 {"code": code, 182 "cc_code": ccCode, 183 "predicate_test": predicateTest}, 184 opt_flags) 185 header_output = BasicDeclare.subst(iop) 186 decoder_output = BasicConstructor.subst(iop) 187 decode_block = BasicDecode.subst(iop) 188 exec_output = PredOpExecute.subst(iop) 189}}; 190 191def format PredIntOp(code, *opt_flags) {{ 192 new_code = ArmGenericCodeSubs(code) 193 iop = InstObjParams(name, Name, 'PredIntOp', 194 {"code": new_code, 195 "predicate_test": predicateTest}, 196 opt_flags) 197 header_output = BasicDeclare.subst(iop) 198 decoder_output = BasicConstructor.subst(iop) 199 decode_block = BasicDecode.subst(iop) 200 exec_output = PredOpExecute.subst(iop) 201}}; 202 203def format PredIntOpCc(code, icValue, ivValue, *opt_flags) {{ 204 ccCode = calcCcCode % vars() 205 code += ccCode; 206 new_code = ArmGenericCodeSubs(code) 207 iop = InstObjParams(name, Name, 'PredIntOp', 208 {"code": new_code, 209 "cc_code": ccCode, 210 "predicate_test": predicateTest}, 211 opt_flags) 212 header_output = BasicDeclare.subst(iop) 213 decoder_output = BasicConstructor.subst(iop) 214 decode_block = BasicDecode.subst(iop) 215 exec_output = PredOpExecute.subst(iop) 216}}; 217 218