// -*- mode:c++ -*- // Copyright (c) 2007-2008 The Florida State University // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer; // redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution; // neither the name of the copyright holders nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // Authors: Stephen Hines //////////////////////////////////////////////////////////////////// // // Predicated Instruction Execution // let {{ predicateTest = 'testPredicate(CondCodes, condCode)' }}; def template PredOpExecute {{ Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const { Fault fault = NoFault; uint64_t resTemp = 0; resTemp = resTemp; %(op_decl)s; %(op_rd)s; if (%(predicate_test)s) { %(code)s; if (fault == NoFault) { %(op_wb)s; } } return fault; } }}; def template DataDecode {{ if (machInst.opcode4 == 0) { if (machInst.sField == 0) return new %(class_name)sImm(machInst); else return new %(class_name)sImmCc(machInst); } else { if (machInst.sField == 0) return new %(class_name)s(machInst); else return new %(class_name)sCc(machInst); } }}; def template DataImmDecode {{ if (machInst.sField == 0) return new %(class_name)s(machInst); else return new %(class_name)sCc(machInst); }}; let {{ calcCcCode = ''' if (%(canOverflow)s){ cprintf("canOverflow: %%d\\n", Rd < resTemp); replaceBits(CondCodes, 27, Rd < resTemp); } else { uint16_t _ic, _iv, _iz, _in; _in = (resTemp >> %(negBit)d) & 1; _iz = (resTemp == 0); _iv = %(ivValue)s & 1; _ic = %(icValue)s & 1; CondCodes = _in << 31 | _iz << 30 | _ic << 29 | _iv << 28 | (CondCodes & 0x0FFFFFFF); DPRINTF(Arm, "in = %%d\\n", _in); DPRINTF(Arm, "iz = %%d\\n", _iz); DPRINTF(Arm, "ic = %%d\\n", _ic); DPRINTF(Arm, "iv = %%d\\n", _iv); } ''' }}; let {{ def getCcCode(flagtype): icReg = icImm = iv = '' negBit = 31 canOverflow = 'false' if flagtype == "none": icReg = icImm = 'CondCodes<29:>' iv = 'CondCodes<28:>' elif flagtype == "llbit": icReg = icImm = 'CondCodes<29:>' iv = 'CondCodes<28:>' negBit = 63 elif flagtype == "overflow": canOverflow = "true" icReg = icImm = iv = '0' elif flagtype == "add": icReg = icImm = 'findCarry(32, resTemp, Rn, op2)' iv = 'findOverflow(32, resTemp, Rn, op2)' elif flagtype == "sub": icReg = icImm ='findCarry(32, resTemp, Rn, ~op2)' iv = 'findOverflow(32, resTemp, Rn, ~op2)' elif flagtype == "rsb": icReg = icImm = 'findCarry(32, resTemp, op2, ~Rn)' iv = 'findOverflow(32, resTemp, op2, ~Rn)' else: icReg = 'shift_carry_rs(Rm, Rs<7:0>, shift, CondCodes<29:>)' icImm = 'shift_carry_imm(Rm, shift_size, shift, CondCodes<29:>)' iv = 'CondCodes<28:>' return (calcCcCode % {"icValue" : icReg, "ivValue" : iv, "negBit" : negBit, "canOverflow" : canOverflow }, calcCcCode % {"icValue" : icImm, "ivValue" : iv, "negBit" : negBit, "canOverflow" : canOverflow }) def getImmCcCode(flagtype): ivValue = icValue = '' negBit = 31 canOverflow = 'false' if flagtype == "none": icValue = 'CondCodes<29:>' ivValue = 'CondCodes<28:>' elif flagtype == "llbit": icValue = 'CondCodes<29:>' ivValue = 'CondCodes<28:>' negBit = 63 elif flagtype == "overflow": icVaule = ivValue = '0' canOverflow = "true" elif flagtype == "add": icValue = 'findCarry(32, resTemp, Rn, rotated_imm)' ivValue = 'findOverflow(32, resTemp, Rn, rotated_imm)' elif flagtype == "sub": icValue = 'findCarry(32, resTemp, Rn, ~rotated_imm)' ivValue = 'findOverflow(32, resTemp, Rn, ~rotated_imm)' elif flagtype == "rsb": icValue = 'findCarry(32, resTemp, rotated_imm, ~Rn)' ivValue = 'findOverflow(32, resTemp, rotated_imm, ~Rn)' else: icValue = '(rotate ? rotated_carry:CondCodes<29:>)' ivValue = 'CondCodes<28:>' return calcCcCode % vars() }}; def format DataOp(code, flagtype = logic) {{ (regCcCode, immCcCode) = getCcCode(flagtype) regCode = '''uint32_t op2 = shift_rm_rs(Rm, Rs<7:0>, shift, CondCodes<29:>); op2 = op2;''' + code immCode = '''uint32_t op2 = shift_rm_imm(Rm, shift_size, shift, CondCodes<29:>); op2 = op2;''' + code regIop = InstObjParams(name, Name, 'PredIntOp', {"code": regCode, "predicate_test": predicateTest}) immIop = InstObjParams(name, Name + "Imm", 'PredIntOp', {"code": immCode, "predicate_test": predicateTest}) regCcIop = InstObjParams(name, Name + "Cc", 'PredIntOp', {"code": regCode + regCcCode, "predicate_test": predicateTest}) immCcIop = InstObjParams(name, Name + "ImmCc", 'PredIntOp', {"code": immCode + immCcCode, "predicate_test": predicateTest}) header_output = BasicDeclare.subst(regIop) + \ BasicDeclare.subst(immIop) + \ BasicDeclare.subst(regCcIop) + \ BasicDeclare.subst(immCcIop) decoder_output = BasicConstructor.subst(regIop) + \ BasicConstructor.subst(immIop) + \ BasicConstructor.subst(regCcIop) + \ BasicConstructor.subst(immCcIop) exec_output = PredOpExecute.subst(regIop) + \ PredOpExecute.subst(immIop) + \ PredOpExecute.subst(regCcIop) + \ PredOpExecute.subst(immCcIop) decode_block = DataDecode.subst(regIop) }}; def format DataImmOp(code, flagtype = logic) {{ code += "resTemp = resTemp;" iop = InstObjParams(name, Name, 'PredImmOp', {"code": code, "predicate_test": predicateTest}) ccIop = InstObjParams(name, Name + "Cc", 'PredImmOp', {"code": code + getImmCcCode(flagtype), "predicate_test": predicateTest}) header_output = BasicDeclare.subst(iop) + \ BasicDeclare.subst(ccIop) decoder_output = BasicConstructor.subst(iop) + \ BasicConstructor.subst(ccIop) exec_output = PredOpExecute.subst(iop) + \ PredOpExecute.subst(ccIop) decode_block = DataImmDecode.subst(iop) }}; def format PredOp(code, *opt_flags) {{ iop = InstObjParams(name, Name, 'PredOp', {"code": code, "predicate_test": predicateTest}, opt_flags) header_output = BasicDeclare.subst(iop) decoder_output = BasicConstructor.subst(iop) decode_block = BasicDecode.subst(iop) exec_output = PredOpExecute.subst(iop) }}; def format PredImmOp(code, *opt_flags) {{ iop = InstObjParams(name, Name, 'PredImmOp', {"code": code, "predicate_test": predicateTest}, opt_flags) header_output = BasicDeclare.subst(iop) decoder_output = BasicConstructor.subst(iop) decode_block = BasicDecode.subst(iop) exec_output = PredOpExecute.subst(iop) }}; def format PredImmOpCc(code, icValue, ivValue, *opt_flags) {{ ccCode = calcCcCode % vars() code += ccCode; iop = InstObjParams(name, Name, 'PredImmOp', {"code": code, "cc_code": ccCode, "predicate_test": predicateTest}, opt_flags) header_output = BasicDeclare.subst(iop) decoder_output = BasicConstructor.subst(iop) decode_block = BasicDecode.subst(iop) exec_output = PredOpExecute.subst(iop) }}; def format PredIntOp(code, *opt_flags) {{ new_code = ArmGenericCodeSubs(code) iop = InstObjParams(name, Name, 'PredIntOp', {"code": new_code, "predicate_test": predicateTest}, opt_flags) header_output = BasicDeclare.subst(iop) decoder_output = BasicConstructor.subst(iop) decode_block = BasicDecode.subst(iop) exec_output = PredOpExecute.subst(iop) }}; def format PredIntOpCc(code, icValue, ivValue, *opt_flags) {{ ccCode = calcCcCode % vars() code += ccCode; new_code = ArmGenericCodeSubs(code) iop = InstObjParams(name, Name, 'PredIntOp', {"code": new_code, "cc_code": ccCode, "predicate_test": predicateTest}, opt_flags) header_output = BasicDeclare.subst(iop) decoder_output = BasicConstructor.subst(iop) decode_block = BasicDecode.subst(iop) exec_output = PredOpExecute.subst(iop) }};