1111nnn1mmm11100
Available only when PR=0 and SZ=1
sr ← ZeroExtend32(SR);
op1 ← FloatValue64(XD2m);
IF (FpuIsDisabled(sr) AND IsDelaySlot())
THROW SLOTFPUDIS;
IF (FpuIsDisabled(sr))
THROW FPUDIS;
op2 ← op1;
XD2n ← FloatRegister64(op2);