sh-dis/sh4/FABS DRn

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1111nnn001011101
Available only when PR=1 and SZ=0
sr ← ZeroExtend32(SR);
op1 ← FloatValue64(DR2n);
IF (FpuIsDisabled(sr) AND IsDelaySlot())
THROW SLOTFPUDIS;
IF (FpuIsDisabled(sr))
THROW FPUDIS;
op1 ← FABS_D(op1);
DR2n ← FloatRegister64(op1);