Table of Contents        Previous topic       Next topic       

MICROPROCESSOR INSTRUCTION REFERENCE->FSQRT

Floating-Point Square Root

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

Square Root of Source -> FPx

    

Assembler Syntax:	FSQRT.fmt <ea>,FPx
	FSQRT.D FPy,FPx
	FSQRT.D FPx
	FrSQRT.fmt <ea>,FPx
	FrSQRT.D FPy,FPx
	FrSQRT.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 calculates the square root of that number.  Stores the result in the destination floating point data register.

FSSQRT rounds to single-precision, FDSQRT rounds to double-precision and FSQRT 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 the input is not-a-number; else cleared
IDE	Set if the input is a denormalised number; else cleared
OPERR	Set if the source operand is negative and not zero; else cleared
OVFL	Always cleared
UNFL	Always cleared
DZ	Always cleared
INEX	Set if the infinitely-precise mantissa of the intermediate result has more significant bits than can be represented exactly in the selected rounding precision; or if the input is a denormalised number and the IDE exception is disabled; or if the result overflowed; or if the result underflowed and the underflow exception is disabled; else cleared

    

	Allowable Addressing Modes

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