diff options
Diffstat (limited to 'llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp index a13d1d794ab..192b3444936 100644 --- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp +++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp @@ -233,6 +233,9 @@ class MipsAsmParser : public MCTargetAsmParser { bool expandDRotationImm(MCInst &Inst, SMLoc IDLoc, SmallVectorImpl<MCInst> &Instructions); + bool expandAbs(MCInst &Inst, SMLoc IDLoc, + SmallVectorImpl<MCInst> &Instructions); + void createNop(bool hasShortDelaySlot, SMLoc IDLoc, SmallVectorImpl<MCInst> &Instructions); @@ -2087,6 +2090,9 @@ MipsAsmParser::tryExpandInstruction(MCInst &Inst, SMLoc IDLoc, case Mips::DRORImm: return expandDRotationImm(Inst, IDLoc, Instructions) ? MER_Fail : MER_Success; + case Mips::ABSMacro: + return expandAbs(Inst, IDLoc, Instructions) ? MER_Fail + : MER_Success; } } @@ -3531,6 +3537,22 @@ bool MipsAsmParser::expandDRotationImm(MCInst &Inst, SMLoc IDLoc, return true; } +bool MipsAsmParser::expandAbs(MCInst &Inst, SMLoc IDLoc, + SmallVectorImpl<MCInst> &Instructions) { + + unsigned FirstRegOp = Inst.getOperand(0).getReg(); + unsigned SecondRegOp = Inst.getOperand(1).getReg(); + + emitRI(Mips::BGEZ, SecondRegOp, 8, IDLoc, Instructions); + if (FirstRegOp != SecondRegOp) + emitRRR(Mips::ADDu, FirstRegOp, SecondRegOp, Mips::ZERO, IDLoc, Instructions); + else + createNop(false, IDLoc, Instructions); + emitRRR(Mips::SUB, FirstRegOp, Mips::ZERO, SecondRegOp, IDLoc, Instructions); + + return false; +} + void MipsAsmParser::createNop(bool hasShortDelaySlot, SMLoc IDLoc, SmallVectorImpl<MCInst> &Instructions) { if (hasShortDelaySlot) |
