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Diffstat (limited to 'src/arch/power/isa/formats/util.isa')
| -rw-r--r-- | src/arch/power/isa/formats/util.isa | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/arch/power/isa/formats/util.isa b/src/arch/power/isa/formats/util.isa new file mode 100644 index 000000000..ab1e530b2 --- /dev/null +++ b/src/arch/power/isa/formats/util.isa @@ -0,0 +1,174 @@ +// -*- mode:c++ -*- + +// Copyright (c) 2003-2005 The Regents of The University of Michigan +// Copyright (c) 2009 The University of Edinburgh +// 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: Steve Reinhardt +// Korey Sewell +// Timothy M. Jones + +// Some instructions ignore the contents of Ra if Ra == 0, +// so check for this. +def template CheckRaDecode {{ + { + if (RA == 0) { + return new %(class_name)sRaZero(machInst); + } else { + return new %(class_name)s(machInst); + } + } +}}; + + +// Some instructions have extra behaviour if Rc is set. +def template CheckRcDecode {{ + { + if (RC31 == 0) { + return new %(class_name)s(machInst); + } else { + return new %(class_name)sRcSet(machInst); + } + } +}}; + + +// Some instructions have extra behaviour if Rc and OE are set. +def template CheckRcOeDecode {{ + { + if (RC31 == 0) { + if (OE == 0) { + return new %(class_name)s(machInst); + } else { + return new %(class_name)sOeSet(machInst); + } + } else { + if (OE == 0) { + return new %(class_name)sRcSet(machInst); + } else { + return new %(class_name)sRcSetOeSet(machInst); + } + } + } +}}; + +// Branch instructions always have two versions, one which sets the link +// register (LR). +def template CheckLkDecode {{ + { + if (LK == 0) { + return new %(class_name)s(machInst); + } else { + return new %(class_name)sUpdateLr(machInst); + } + } +}}; + + +let {{ + +def LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, + base_class = 'MemOp', + decode_template = BasicDecode, exec_template_base = ''): + # Make sure flags are in lists (convert to lists if not). + mem_flags = makeList(mem_flags) + inst_flags = makeList(inst_flags) + + # add hook to get effective addresses into execution trace output. + ea_code += '\nif (traceData) { traceData->setAddr(EA); }\n' + + # Generate InstObjParams for the memory access. + iop = InstObjParams(name, Name, base_class, + {'ea_code': ea_code, + 'memacc_code': memacc_code}, + inst_flags) + + if mem_flags: + s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';' + iop.constructor += s + + fullExecTemplate = eval(exec_template_base + 'Execute') + initiateAccTemplate = eval(exec_template_base + 'InitiateAcc') + completeAccTemplate = eval(exec_template_base + 'CompleteAcc') + + # (header_output, decoder_output, decode_block, exec_output) + return (LoadStoreDeclare.subst(iop), + LoadStoreConstructor.subst(iop), + decode_template.subst(iop), + fullExecTemplate.subst(iop) + + initiateAccTemplate.subst(iop) + + completeAccTemplate.subst(iop)) + + +# The generic ALU instruction generator. Integer and fp formats calls this +# to generate the different output sections. +def GenAluOp(name, Name, base_class, code, inst_flags, decode_template, + constructor_template): + iop = InstObjParams(name, Name, base_class, + {"code": code}, + inst_flags) + header_output = BasicDeclare.subst(iop) + exec_output = BasicExecute.subst(iop) + + # We use constructors dependent on the Rc and OE bits being set + decoder_output = constructor_template.subst(iop) + + # The decode block defines which version to use + decode_block = decode_template.subst(iop) + return (header_output, decoder_output, decode_block, exec_output) + +}}; + + +output header {{ + std::string + inst2string(MachInst machInst); +}}; + +output decoder {{ + + std::string + inst2string(MachInst machInst) + { + std::string str = ""; + uint32_t mask = 0x80000000; + + for(int i=0; i < 32; i++) { + if ((machInst & mask) == 0) { + str += "0"; + } else { + str += "1"; + } + + mask = mask >> 1; + } + + return str; + } + +}}; + + |