diff options
Diffstat (limited to 'llvm/lib/Target/Mips/MipsSEInstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/MipsSEInstrInfo.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp index ea703d0edd9..06378871988 100644 --- a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp +++ b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp @@ -377,6 +377,9 @@ bool MipsSEInstrInfo::expandPostRAPseudo(MachineInstr &MI) const { case Mips::PseudoCVT_D64_W: expandCvtFPInt(MBB, MI, Mips::CVT_D64_W, Mips::MTC1, true); break; + case Mips::PseudoReadFCC: + expandReadFCC(MBB, MI); + break; case Mips::PseudoCVT_D64_L: expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true); break; @@ -624,6 +627,37 @@ void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB, BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill); } +void MipsSEInstrInfo::expandReadFCC(MachineBasicBlock &MBB, + MachineBasicBlock::iterator I) const { + assert(I->getOperand(1).isImm() && "Malformed PseudoReadFCC Node"); + + bool Invert = (I->getOperand(1).getImm()) == 1; + const MachineOperand &Dest = I->getOperand(0), &Src = I->getOperand(2); + unsigned DstReg = Dest.getReg(), SrcReg = Src.getReg(); + + DebugLoc DL = I->getDebugLoc(); + BuildMI(MBB, I, DL, get(Mips::CFC1), DstReg).addReg(Mips::FCR31); + unsigned Shift = 0; + switch (SrcReg) { + case Mips::FCC0: Shift = 23; break; + case Mips::FCC1: Shift = 25; break; + case Mips::FCC2: Shift = 26; break; + case Mips::FCC3: Shift = 27; break; + case Mips::FCC4: Shift = 28; break; + case Mips::FCC5: Shift = 29; break; + case Mips::FCC6: Shift = 30; break; + case Mips::FCC7: Shift = 31; break; + default: + llvm_unreachable("Unknown $fcc register for expandReadFCC!"); + } + BuildMI(MBB, I, DL, get(Mips::SRL), DstReg).addReg(DstReg).addImm(Shift); + + if (Invert) + BuildMI(MBB, I, DL, get(Mips::NOR), DstReg).addReg(DstReg).addReg(DstReg); + + BuildMI(MBB, I, DL, get(Mips::ANDi), DstReg).addReg(DstReg).addImm(1); +} + void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, bool FP64) const { |
