From be096f91b94ded36f43dd7d547a5671f99a264b1 Mon Sep 17 00:00:00 2001 From: Ali Saidi Date: Mon, 4 Apr 2011 11:42:27 -0500 Subject: ARM: Tag appropriate instructions as IsReturn --- src/arch/arm/isa/insts/branch.isa | 6 ++++-- src/arch/arm/isa/insts/data.isa | 19 ++++++++++++------- src/arch/arm/isa/insts/ldr.isa | 7 ++++++- src/arch/arm/isa/insts/mem.isa | 10 ++++++++-- src/arch/arm/isa/templates/branch.isa | 4 ++++ src/arch/arm/isa/templates/mem.isa | 18 ++++++++++++++++++ src/arch/arm/isa/templates/pred.isa | 13 +++++++++++++ 7 files changed, 65 insertions(+), 12 deletions(-) (limited to 'src/arch/arm') diff --git a/src/arch/arm/isa/insts/branch.isa b/src/arch/arm/isa/insts/branch.isa index 84b9bb720..767c07835 100644 --- a/src/arch/arm/isa/insts/branch.isa +++ b/src/arch/arm/isa/insts/branch.isa @@ -81,6 +81,7 @@ let {{ for (mnem, imm, link) in blxList: Name = mnem.capitalize() + isRasPop = 0 if imm: Name += "Imm" # Since we're switching ISAs, the target ISA will be the opposite @@ -123,7 +124,7 @@ let {{ instFlags += ["IsCall"] else: linkStr = "" - instFlags += ["IsReturn"] + isRasPop = "op1 == INTREG_LR" if imm and link: #blx with imm branchStr = ''' @@ -141,7 +142,8 @@ let {{ "branch": branchStr} blxIop = InstObjParams(mnem, Name, base, {"code": code, "brTgtCode" : br_tgt_code, - "predicate_test": predicateTest}, instFlags) + "predicate_test": predicateTest, + "is_ras_pop" : isRasPop }, instFlags) header_output += declare.subst(blxIop) decoder_output += constructor.subst(blxIop) exec_output += PredOpExecute.subst(blxIop) diff --git a/src/arch/arm/isa/insts/data.isa b/src/arch/arm/isa/insts/data.isa index ac5b12a95..9af81b465 100644 --- a/src/arch/arm/isa/insts/data.isa +++ b/src/arch/arm/isa/insts/data.isa @@ -143,7 +143,8 @@ let {{ subst(immIopCc) def buildRegDataInst(mnem, code, flagType = "logic", suffix = "Reg", \ - buildCc = True, buildNonCc = True, instFlags = []): + buildCc = True, buildNonCc = True, isRasPop = "0", \ + isBranch = "0", instFlags = []): cCode = carryCode[flagType] vCode = overflowCode[flagType] negBit = 31 @@ -161,13 +162,15 @@ let {{ } regCode = secondOpRe.sub(regOp2, code) regIop = InstObjParams(mnem, mnem.capitalize() + suffix, "DataRegOp", - {"code" : regCode, + {"code" : regCode, "is_ras_pop" : isRasPop, + "is_branch" : isBranch, "predicate_test": predicateTest}, instFlags) regIopCc = InstObjParams(mnem + "s", mnem.capitalize() + suffix + "Cc", "DataRegOp", {"code" : regCode + regCcCode, - "predicate_test": condPredicateTest}, - instFlags) + "predicate_test": condPredicateTest, + "is_ras_pop" : isRasPop, + "is_branch" : isBranch}, instFlags) def subst(iop): global header_output, decoder_output, exec_output @@ -222,7 +225,7 @@ let {{ def buildDataInst(mnem, code, flagType = "logic", \ aiw = True, regRegAiw = True, - subsPcLr = True): + subsPcLr = True, isRasPop = "0", isBranch = "0"): regRegCode = instCode = code if aiw: instCode = "AIW" + instCode @@ -230,7 +233,8 @@ let {{ regRegCode = "AIW" + regRegCode buildImmDataInst(mnem, instCode, flagType) - buildRegDataInst(mnem, instCode, flagType) + buildRegDataInst(mnem, instCode, flagType, + isRasPop = isRasPop, isBranch = isBranch) buildRegRegDataInst(mnem, regRegCode, flagType) if subsPcLr: code += ''' @@ -269,7 +273,8 @@ let {{ buildDataInst("cmn", "resTemp = Op1 + secondOp;", "add", aiw = False) buildDataInst("orr", "Dest = resTemp = Op1 | secondOp;") buildDataInst("orn", "Dest = resTemp = Op1 | ~secondOp;", aiw = False) - buildDataInst("mov", "Dest = resTemp = secondOp;", regRegAiw = False) + buildDataInst("mov", "Dest = resTemp = secondOp;", regRegAiw = False, + isRasPop = "op1 == INTREG_LR", isBranch = "dest == INTREG_PC") buildDataInst("bic", "Dest = resTemp = Op1 & ~secondOp;") buildDataInst("mvn", "Dest = resTemp = ~secondOp;") buildDataInst("movt", diff --git a/src/arch/arm/isa/insts/ldr.isa b/src/arch/arm/isa/insts/ldr.isa index 2e45f2875..bfa94103f 100644 --- a/src/arch/arm/isa/insts/ldr.isa +++ b/src/arch/arm/isa/insts/ldr.isa @@ -58,6 +58,7 @@ let {{ self.sign = sign self.user = user self.flavor = flavor + self.rasPop = False if self.add: self.op = " +" @@ -77,7 +78,7 @@ let {{ newDecoder, newExec) = self.fillTemplates(self.name, self.Name, codeBlobs, self.memFlags, instFlags, base, - wbDecl, pcDecl) + wbDecl, pcDecl, self.rasPop) header_output += newHeader decoder_output += newDecoder @@ -128,6 +129,10 @@ let {{ else: self.wbDecl = "MicroSubiUop(machInst, base, base, imm);" + if self.add and self.post and self.writeback and not self.sign and \ + not self.user and self.size == 4: + self.rasPop = True + class LoadRegInst(LoadInst): def __init__(self, *args, **kargs): super(LoadRegInst, self).__init__(*args, **kargs) diff --git a/src/arch/arm/isa/insts/mem.isa b/src/arch/arm/isa/insts/mem.isa index d0c0f0710..ca0d701d3 100644 --- a/src/arch/arm/isa/insts/mem.isa +++ b/src/arch/arm/isa/insts/mem.isa @@ -48,7 +48,8 @@ let {{ self.constructTemplate = eval(self.decConstBase + 'Constructor') def fillTemplates(self, name, Name, codeBlobs, memFlags, instFlags, - base = 'Memory', wbDecl = None, pcDecl = None): + base = 'Memory', wbDecl = None, pcDecl = None, + rasPop = False): # Make sure flags are in lists (convert to lists if not). memFlags = makeList(memFlags) instFlags = makeList(instFlags) @@ -85,6 +86,10 @@ let {{ codeBlobsCopy['use_uops'] = 0 codeBlobsCopy['use_wb'] = 0 codeBlobsCopy['use_pc'] = 0 + is_ras_pop = "0" + if rasPop: + is_ras_pop = "1" + codeBlobsCopy['is_ras_pop'] = is_ras_pop iop = InstObjParams(name, Name, base, codeBlobsCopy, instFlagsCopy) @@ -102,7 +107,8 @@ let {{ "acc_name" : Name, "use_uops" : use_uops, "use_pc" : use_pc, - "use_wb" : use_wb }, + "use_wb" : use_wb, + "is_ras_pop" : is_ras_pop }, ['IsMacroop']) header_output += self.declareTemplate.subst(iop) decoder_output += self.constructTemplate.subst(iop) diff --git a/src/arch/arm/isa/templates/branch.isa b/src/arch/arm/isa/templates/branch.isa index 6abf76963..3a8fbb363 100644 --- a/src/arch/arm/isa/templates/branch.isa +++ b/src/arch/arm/isa/templates/branch.isa @@ -120,6 +120,8 @@ def template BranchRegConstructor {{ } else { flags[IsUncondControl] = true; } + if (%(is_ras_pop)s) + flags[IsReturn] = true; } }}; @@ -150,6 +152,8 @@ def template BranchRegCondConstructor {{ } else { flags[IsUncondControl] = true; } + if (%(is_ras_pop)s) + flags[IsReturn] = true; } }}; diff --git a/src/arch/arm/isa/templates/mem.isa b/src/arch/arm/isa/templates/mem.isa index dcfd47ace..f26ee55e8 100644 --- a/src/arch/arm/isa/templates/mem.isa +++ b/src/arch/arm/isa/templates/mem.isa @@ -1188,7 +1188,9 @@ def template LoadRegConstructor {{ (IntRegIndex)_index) { %(constructor)s; + bool conditional = false; if (!(condCode == COND_AL || condCode == COND_UC)) { + conditional = true; for (int x = 0; x < _numDestRegs; x++) { _srcRegIdx[_numSrcRegs++] = _destRegIdx[x]; } @@ -1204,6 +1206,12 @@ def template LoadRegConstructor {{ uops[1] = new %(wb_decl)s; uops[1]->setDelayedCommit(); uops[2] = new MicroUopRegMov(machInst, INTREG_PC, INTREG_UREG0); + uops[2]->setFlag(StaticInst::IsControl); + uops[2]->setFlag(StaticInst::IsIndirectControl); + if (conditional) + uops[2]->setFlag(StaticInst::IsCondControl); + else + uops[2]->setFlag(StaticInst::IsUncondControl); uops[2]->setLastMicroop(); } else if(_dest == _index) { IntRegIndex wbIndexReg = INTREG_UREG0; @@ -1234,7 +1242,9 @@ def template LoadImmConstructor {{ (IntRegIndex)_dest, (IntRegIndex)_base, _add, _imm) { %(constructor)s; + bool conditional = false; if (!(condCode == COND_AL || condCode == COND_UC)) { + conditional = true; for (int x = 0; x < _numDestRegs; x++) { _srcRegIdx[_numSrcRegs++] = _destRegIdx[x]; } @@ -1249,6 +1259,14 @@ def template LoadImmConstructor {{ uops[1] = new %(wb_decl)s; uops[1]->setDelayedCommit(); uops[2] = new MicroUopRegMov(machInst, INTREG_PC, INTREG_UREG0); + uops[2]->setFlag(StaticInst::IsControl); + uops[2]->setFlag(StaticInst::IsIndirectControl); + if (conditional) + uops[2]->setFlag(StaticInst::IsCondControl); + else + uops[2]->setFlag(StaticInst::IsUncondControl); + if (_base == INTREG_SP && _add && _imm == 4 && %(is_ras_pop)s) + uops[2]->setFlag(StaticInst::IsReturn); uops[2]->setLastMicroop(); } else { uops[0] = new %(acc_name)s(machInst, _dest, _base, _add, _imm); diff --git a/src/arch/arm/isa/templates/pred.isa b/src/arch/arm/isa/templates/pred.isa index 2a4bd9dab..95c7c8e1b 100644 --- a/src/arch/arm/isa/templates/pred.isa +++ b/src/arch/arm/isa/templates/pred.isa @@ -107,6 +107,19 @@ def template DataRegConstructor {{ _srcRegIdx[_numSrcRegs++] = _destRegIdx[x]; } } + + if (%(is_branch)s){ + flags[IsControl] = true; + flags[IsIndirectControl] = true; + if (condCode == COND_AL || condCode == COND_UC) + flags[IsCondControl] = true; + else + flags[IsUncondControl] = true; + } + + if (%(is_ras_pop)s) { + flags[IsReturn] = true; + } } }}; -- cgit v1.2.3