1111nnnn01011101
Available only when PR=0
sr ← ZeroExtend32(SR);
op1 ← FloatValue32(FRn);
IF (FpuIsDisabled(sr) AND IsDelaySlot())
THROW SLOTFPUDIS;
IF (FpuIsDisabled(sr))
THROW FPUDIS;
op1 ← FABS_S(op1);
FRn ← FloatRegister32(op1);