unsigned SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
- if (SubIdx == Mips::sub_hi && FP64) {
- // FIXME: The .addReg(SrcReg, RegState::Implicit) is a white lie used to
+ if (SubIdx == Mips::sub_hi && TM.getSubtarget<MipsSubtarget>().hasMTHC1()) {
+ // FIXME: Strictly speaking MFHC1 only reads the top 32-bits however, we
+ // claim to read the whole 64-bits as part of a white lie used to
// temporarily work around a widespread bug in the -mfp64 support.
// The problem is that none of the 32-bit fpu ops mention the fact
// that they clobber the upper 32-bits of the 64-bit FPR. Fixing that
// We therefore pretend that it reads the bottom 32-bits to
// artificially create a dependency and prevent the scheduler
// changing the behaviour of the code.
- BuildMI(MBB, I, dl, get(Mips::MFHC1), DstReg).addReg(SubReg).addReg(
- SrcReg, RegState::Implicit);
+ BuildMI(MBB, I, dl, get(FP64 ? Mips::MFHC1_D64 : Mips::MFHC1_D32), DstReg)
+ .addReg(SrcReg);
} else
BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
}