1111nnnn10011101
Available only when PR=0
sr ← ZeroExtend32(SR);
IF (FpuIsDisabled(sr) AND IsDelaySlot())
THROW SLOTFPUDIS;
IF (FpuIsDisabled(sr))
THROW FPUDIS;
op1 ← 0x3F800000;
FRn ← FloatRegister32(op1);