-RecognizableInstr::filter_ret RecognizableInstr::filter() const {
- ///////////////////
- // FILTER_STRONG
- //
-
- // Filter out intrinsics
-
- assert(Rec->isSubClassOf("X86Inst") && "Can only filter X86 instructions");
-
- if (Form == X86Local::Pseudo ||
- (IsCodeGenOnly && Name.find("_REV") == Name.npos))
- return FILTER_STRONG;
-
-
- // Filter out artificial instructions but leave in the LOCK_PREFIX so it is
- // printed as a separate "instruction".
-
- if (Name.find("_Int") != Name.npos ||
- Name.find("Int_") != Name.npos)
- return FILTER_STRONG;
-
- // Filter out instructions with segment override prefixes.
- // They're too messy to handle now and we'll special case them if needed.
-
- if (SegOvr)
- return FILTER_STRONG;
-
-
- /////////////////
- // FILTER_WEAK
- //
-
-
- // Filter out instructions with a LOCK prefix;
- // prefer forms that do not have the prefix
- if (HasLockPrefix)
- return FILTER_WEAK;
-
- // Filter out alternate forms of AVX instructions
- if (Name.find("_alt") != Name.npos ||
- Name.find("XrYr") != Name.npos ||
- (Name.find("r64r") != Name.npos && Name.find("r64r64") == Name.npos) ||
- Name.find("_64mr") != Name.npos ||
- Name.find("Xrr") != Name.npos ||
- Name.find("rr64") != Name.npos)
- return FILTER_WEAK;
-
- // Special cases.
-
- if (Name.find("PCMPISTRI") != Name.npos && Name != "PCMPISTRI")
- return FILTER_WEAK;
- if (Name.find("PCMPESTRI") != Name.npos && Name != "PCMPESTRI")
- return FILTER_WEAK;
-
- if (Name.find("MOV") != Name.npos && Name.find("r0") != Name.npos)
- return FILTER_WEAK;
- if (Name.find("MOVZ") != Name.npos && Name.find("MOVZX") == Name.npos)
- return FILTER_WEAK;
- if (Name.find("Fs") != Name.npos)
- return FILTER_WEAK;
- if (Name == "PUSH64i16" ||
- Name == "MOVPQI2QImr" ||
- Name == "VMOVPQI2QImr" ||
- Name == "MMX_MOVD64rrv164" ||
- Name == "MOV64ri64i32" ||
- Name == "VMASKMOVDQU64" ||
- Name == "VEXTRACTPSrr64" ||
- Name == "VMOVQd64rr" ||
- Name == "VMOVQs64rr")
- return FILTER_WEAK;
-
- // XACQUIRE and XRELEASE reuse REPNE and REP respectively.
- // For now, just prefer the REP versions.
- if (Name == "XACQUIRE_PREFIX" ||
- Name == "XRELEASE_PREFIX")
- return FILTER_WEAK;
-
- if (HasFROperands && Name.find("MOV") != Name.npos &&
- ((Name.find("2") != Name.npos && Name.find("32") == Name.npos) ||
- (Name.find("to") != Name.npos)))
- return FILTER_STRONG;
-
- return FILTER_NORMAL;
-}
-
-bool RecognizableInstr::hasFROperands() const {
- const std::vector<CGIOperandList::OperandInfo> &OperandList = *Operands;
- unsigned numOperands = OperandList.size();
-
- for (unsigned operandIndex = 0; operandIndex < numOperands; ++operandIndex) {
- const std::string &recName = OperandList[operandIndex].Rec->getName();
-
- if (recName.find("FR") != recName.npos)
- return true;
- }
- return false;