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MICROPROCESSOR INSTRUCTION REFERENCE->FABS

Floating-Point Absolute Value

Compatibility: ColdFire chips with a floating-point unit (FPU)

Absolute value of source ->FPx

    

Assembler Syntax:	FABS.fmt <ea>,FPx
	FABS.D FPy,FPx
	FABS.D FPx
	FrABS.fmt <ea>,FPx
	FrABS.D FPy,FPx
	FrABS.D FPx

where r is rounding precision, S or D

Format: Byte (B), Word (W), Long (L), Single-precision (S), Double-precision (D)

Converts the source operand to double-precision (if necessary) and stores its absolute value in the destination floating point data register.

FSABS rounds to single-precision, FDABS rounds to double-precision and FABS rounds to the precision specified by the floating point control register FPCR (which by default is double-precision).

Floating-Point Status Register:

N	Set if result is negative;else cleared
Z	Set if result is zero;else cleared
I	Set if result is infinity;else cleared
NAN	Set if result is a NAN;else cleared
BSUN	Always cleared
INAN	Set if source is not-a-number, else cleared
IDE	Set if source is a denormalised number, else cleared
OPERR	Always cleared
OVFL	Always cleared
UNFL	Always cleared
DZ	Always cleared
INEX	Always cleared

    

	Allowable Addressing Modes

	Dn,FPn
	(An),FPn
	(An)+,FPn
	-(An),FPn
	(d16,An),FPn
	(d16,PC),FPn