diff options
Diffstat (limited to 'llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp index e12188e7060..b72c9d53447 100644 --- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp +++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp @@ -304,6 +304,9 @@ class MipsAsmParser : public MCTargetAsmParser { bool expandSeqI(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, const MCSubtargetInfo *STI); + bool expandMXTRAlias(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, + const MCSubtargetInfo *STI); + bool reportParseError(Twine ErrorMsg); bool reportParseError(SMLoc Loc, Twine ErrorMsg); @@ -2511,6 +2514,16 @@ MipsAsmParser::tryExpandInstruction(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, return expandSeq(Inst, IDLoc, Out, STI) ? MER_Fail : MER_Success; case Mips::SEQIMacro: return expandSeqI(Inst, IDLoc, Out, STI) ? MER_Fail : MER_Success; + case Mips::MFTC0: case Mips::MTTC0: + case Mips::MFTGPR: case Mips::MTTGPR: + case Mips::MFTLO: case Mips::MTTLO: + case Mips::MFTHI: case Mips::MTTHI: + case Mips::MFTACX: case Mips::MTTACX: + case Mips::MFTDSP: case Mips::MTTDSP: + case Mips::MFTC1: case Mips::MTTC1: + case Mips::MFTHC1: case Mips::MTTHC1: + case Mips::CFTC1: case Mips::CTTC1: + return expandMXTRAlias(Inst, IDLoc, Out, STI) ? MER_Fail : MER_Success; } } @@ -4882,6 +4895,212 @@ bool MipsAsmParser::expandSeqI(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, return false; } +// Map the DSP accumulator and control register to the corresponding gpr +// operand. Unlike the other alias, the m(f|t)t(lo|hi|acx) instructions +// do not map the DSP registers contigously to gpr registers. +static unsigned getRegisterForMxtrDSP(MCInst &Inst, bool IsMFDSP) { + switch (Inst.getOpcode()) { + case Mips::MFTLO: + case Mips::MTTLO: + switch (Inst.getOperand(IsMFDSP ? 1 : 0).getReg()) { + case Mips::AC0: + return Mips::ZERO; + case Mips::AC1: + return Mips::A0; + case Mips::AC2: + return Mips::T0; + case Mips::AC3: + return Mips::T4; + default: + llvm_unreachable("Unknown register for 'mttr' alias!"); + } + case Mips::MFTHI: + case Mips::MTTHI: + switch (Inst.getOperand(IsMFDSP ? 1 : 0).getReg()) { + case Mips::AC0: + return Mips::AT; + case Mips::AC1: + return Mips::A1; + case Mips::AC2: + return Mips::T1; + case Mips::AC3: + return Mips::T5; + default: + llvm_unreachable("Unknown register for 'mttr' alias!"); + } + case Mips::MFTACX: + case Mips::MTTACX: + switch (Inst.getOperand(IsMFDSP ? 1 : 0).getReg()) { + case Mips::AC0: + return Mips::V0; + case Mips::AC1: + return Mips::A2; + case Mips::AC2: + return Mips::T2; + case Mips::AC3: + return Mips::T6; + default: + llvm_unreachable("Unknown register for 'mttr' alias!"); + } + case Mips::MFTDSP: + case Mips::MTTDSP: + return Mips::S0; + default: + llvm_unreachable("Unknown instruction for 'mttr' dsp alias!"); + } +} + +// Map the floating point register operand to the corresponding register +// operand. +static unsigned getRegisterForMxtrFP(MCInst &Inst, bool IsMFTC1) { + switch (Inst.getOperand(IsMFTC1 ? 1 : 0).getReg()) { + case Mips::F0: return Mips::ZERO; + case Mips::F1: return Mips::AT; + case Mips::F2: return Mips::V0; + case Mips::F3: return Mips::V1; + case Mips::F4: return Mips::A0; + case Mips::F5: return Mips::A1; + case Mips::F6: return Mips::A2; + case Mips::F7: return Mips::A3; + case Mips::F8: return Mips::T0; + case Mips::F9: return Mips::T1; + case Mips::F10: return Mips::T2; + case Mips::F11: return Mips::T3; + case Mips::F12: return Mips::T4; + case Mips::F13: return Mips::T5; + case Mips::F14: return Mips::T6; + case Mips::F15: return Mips::T7; + case Mips::F16: return Mips::S0; + case Mips::F17: return Mips::S1; + case Mips::F18: return Mips::S2; + case Mips::F19: return Mips::S3; + case Mips::F20: return Mips::S4; + case Mips::F21: return Mips::S5; + case Mips::F22: return Mips::S6; + case Mips::F23: return Mips::S7; + case Mips::F24: return Mips::T8; + case Mips::F25: return Mips::T9; + case Mips::F26: return Mips::K0; + case Mips::F27: return Mips::K1; + case Mips::F28: return Mips::GP; + case Mips::F29: return Mips::SP; + case Mips::F30: return Mips::FP; + case Mips::F31: return Mips::RA; + default: llvm_unreachable("Unknown register for mttc1 alias!"); + } +} + +// Map the coprocessor operand the corresponding gpr register operand. +static unsigned getRegisterForMxtrC0(MCInst &Inst, bool IsMFTC0) { + switch (Inst.getOperand(IsMFTC0 ? 1 : 0).getReg()) { + case Mips::COP00: return Mips::ZERO; + case Mips::COP01: return Mips::AT; + case Mips::COP02: return Mips::V0; + case Mips::COP03: return Mips::V1; + case Mips::COP04: return Mips::A0; + case Mips::COP05: return Mips::A1; + case Mips::COP06: return Mips::A2; + case Mips::COP07: return Mips::A3; + case Mips::COP08: return Mips::T0; + case Mips::COP09: return Mips::T1; + case Mips::COP010: return Mips::T2; + case Mips::COP011: return Mips::T3; + case Mips::COP012: return Mips::T4; + case Mips::COP013: return Mips::T5; + case Mips::COP014: return Mips::T6; + case Mips::COP015: return Mips::T7; + case Mips::COP016: return Mips::S0; + case Mips::COP017: return Mips::S1; + case Mips::COP018: return Mips::S2; + case Mips::COP019: return Mips::S3; + case Mips::COP020: return Mips::S4; + case Mips::COP021: return Mips::S5; + case Mips::COP022: return Mips::S6; + case Mips::COP023: return Mips::S7; + case Mips::COP024: return Mips::T8; + case Mips::COP025: return Mips::T9; + case Mips::COP026: return Mips::K0; + case Mips::COP027: return Mips::K1; + case Mips::COP028: return Mips::GP; + case Mips::COP029: return Mips::SP; + case Mips::COP030: return Mips::FP; + case Mips::COP031: return Mips::RA; + default: llvm_unreachable("Unknown register for mttc0 alias!"); + } +} + +/// Expand an alias of 'mftr' or 'mttr' into the full instruction, by producing +/// an mftr or mttr with the correctly mapped gpr register, u, sel and h bits. +bool MipsAsmParser::expandMXTRAlias(MCInst &Inst, SMLoc IDLoc, MCStreamer &Out, + const MCSubtargetInfo *STI) { + MipsTargetStreamer &TOut = getTargetStreamer(); + unsigned rd = 0; + unsigned u = 1; + unsigned sel = 0; + unsigned h = 0; + bool IsMFTR = false; + switch (Inst.getOpcode()) { + case Mips::MFTC0: + IsMFTR = true; + LLVM_FALLTHROUGH; + case Mips::MTTC0: + u = 0; + rd = getRegisterForMxtrC0(Inst, IsMFTR); + sel = Inst.getOperand(2).getImm(); + break; + case Mips::MFTGPR: + IsMFTR = true; + LLVM_FALLTHROUGH; + case Mips::MTTGPR: + rd = Inst.getOperand(IsMFTR ? 1 : 0).getReg(); + break; + case Mips::MFTLO: + case Mips::MFTHI: + case Mips::MFTACX: + case Mips::MFTDSP: + IsMFTR = true; + LLVM_FALLTHROUGH; + case Mips::MTTLO: + case Mips::MTTHI: + case Mips::MTTACX: + case Mips::MTTDSP: + rd = getRegisterForMxtrDSP(Inst, IsMFTR); + sel = 1; + break; + case Mips::MFTHC1: + h = 1; + LLVM_FALLTHROUGH; + case Mips::MFTC1: + IsMFTR = true; + rd = getRegisterForMxtrFP(Inst, IsMFTR); + sel = 2; + break; + case Mips::MTTHC1: + h = 1; + LLVM_FALLTHROUGH; + case Mips::MTTC1: + rd = getRegisterForMxtrFP(Inst, IsMFTR); + sel = 2; + break; + case Mips::CFTC1: + IsMFTR = true; + LLVM_FALLTHROUGH; + case Mips::CTTC1: + rd = getRegisterForMxtrFP(Inst, IsMFTR); + sel = 3; + break; + } + unsigned Op0 = IsMFTR ? Inst.getOperand(0).getReg() : rd; + unsigned Op1 = + IsMFTR ? rd + : (Inst.getOpcode() != Mips::MTTDSP ? Inst.getOperand(1).getReg() + : Inst.getOperand(0).getReg()); + + TOut.emitRRIII(IsMFTR ? Mips::MFTR : Mips::MTTR, Op0, Op1, u, sel, h, IDLoc, + STI); + return false; +} + unsigned MipsAsmParser::checkEarlyTargetMatchPredicate(MCInst &Inst, const OperandVector &Operands) { |
