diff options
Diffstat (limited to 'llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp index 13e80707da2..d0fe076c4b4 100644 --- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp +++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp @@ -249,6 +249,9 @@ class MipsAsmParser : public MCTargetAsmParser { bool expandAbs(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, const MCSubtargetInfo *STI); + bool expandLoadStoreDMacro(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, + const MCSubtargetInfo *STI, bool IsLoad); + bool reportParseError(Twine ErrorMsg); bool reportParseError(SMLoc Loc, Twine ErrorMsg); @@ -2213,6 +2216,12 @@ MipsAsmParser::tryExpandInstruction(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, return expandDRotationImm(Inst, IDLoc, Out, STI) ? MER_Fail : MER_Success; case Mips::ABSMacro: return expandAbs(Inst, IDLoc, Out, STI) ? MER_Fail : MER_Success; + case Mips::LDMacro: + case Mips::SDMacro: + return expandLoadStoreDMacro(Inst, IDLoc, Out, STI, + Inst.getOpcode() == Mips::LDMacro) + ? MER_Fail + : MER_Success; } } @@ -3819,6 +3828,92 @@ bool MipsAsmParser::expandAbs(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, return false; } +static unsigned nextReg(unsigned Reg) { + switch (Reg) { + case Mips::ZERO: return Mips::AT; + case Mips::AT: return Mips::V0; + case Mips::V0: return Mips::V1; + case Mips::V1: return Mips::A0; + case Mips::A0: return Mips::A1; + case Mips::A1: return Mips::A2; + case Mips::A2: return Mips::A3; + case Mips::A3: return Mips::T0; + case Mips::T0: return Mips::T1; + case Mips::T1: return Mips::T2; + case Mips::T2: return Mips::T3; + case Mips::T3: return Mips::T4; + case Mips::T4: return Mips::T5; + case Mips::T5: return Mips::T6; + case Mips::T6: return Mips::T7; + case Mips::T7: return Mips::S0; + case Mips::S0: return Mips::S1; + case Mips::S1: return Mips::S2; + case Mips::S2: return Mips::S3; + case Mips::S3: return Mips::S4; + case Mips::S4: return Mips::S5; + case Mips::S5: return Mips::S6; + case Mips::S6: return Mips::S7; + case Mips::S7: return Mips::T8; + case Mips::T8: return Mips::T9; + case Mips::T9: return Mips::K0; + case Mips::K0: return Mips::K1; + case Mips::K1: return Mips::GP; + case Mips::GP: return Mips::SP; + case Mips::SP: return Mips::FP; + case Mips::FP: return Mips::RA; + case Mips::RA: return Mips::ZERO; + default: return 0; + } + +} + +// Expand 'ld $<reg> offset($reg2)' to 'lw $<reg>, offset($reg2); +// lw $<reg+1>>, offset+4($reg2)' +// or expand 'sd $<reg> offset($reg2)' to 'sw $<reg>, offset($reg2); +// sw $<reg+1>>, offset+4($reg2)' +// for O32. +bool MipsAsmParser::expandLoadStoreDMacro(MCInst &Inst, SMLoc IDLoc, + MCStreamer &Out, + const MCSubtargetInfo *STI, + bool IsLoad) { + if (!isABI_O32()) + return true; + + warnIfNoMacro(IDLoc); + + MipsTargetStreamer &TOut = getTargetStreamer(); + unsigned Opcode = IsLoad ? Mips::LW : Mips::SW; + unsigned FirstReg = Inst.getOperand(0).getReg(); + unsigned SecondReg = nextReg(FirstReg); + unsigned BaseReg = Inst.getOperand(1).getReg(); + if (!SecondReg) + return true; + + warnIfRegIndexIsAT(FirstReg, IDLoc); + + assert(Inst.getOperand(2).isImm() && + "Offset for load macro is not immediate!"); + + MCOperand &FirstOffset = Inst.getOperand(2); + signed NextOffset = FirstOffset.getImm() + 4; + MCOperand SecondOffset = MCOperand::createImm(NextOffset); + + if (!isInt<16>(FirstOffset.getImm()) || !isInt<16>(NextOffset)) + return true; + + // For loads, clobber the base register with the second load instead of the + // first if the BaseReg == FirstReg. + if (FirstReg != BaseReg || !IsLoad) { + TOut.emitRRX(Opcode, FirstReg, BaseReg, FirstOffset, IDLoc, STI); + TOut.emitRRX(Opcode, SecondReg, BaseReg, SecondOffset, IDLoc, STI); + } else { + TOut.emitRRX(Opcode, SecondReg, BaseReg, SecondOffset, IDLoc, STI); + TOut.emitRRX(Opcode, FirstReg, BaseReg, FirstOffset, IDLoc, STI); + } + + return false; +} + unsigned MipsAsmParser::checkEarlyTargetMatchPredicate(MCInst &Inst, const OperandVector &Operands) { |
