nrm - Normalize

nrm     dest, src

Name	Registers
dest	A temporary register.
src	A temporary register or input register.

You cannot specify the same register for src and dest.

Stores the normalized result of src in dest.

tmp = sqrt ( src.x * src.x + src.y * src.y + src.z * src.z + src.w * src.w )
dest.x = src.x* ( 1 / tmp )
dest.y = src.y* ( 1 / tmp )
dest.z = src.z* ( 1 / tmp )
dest.w = src.w* ( 1 / tmp )

dp4     dest.x, src,    src
rsq     dest.x, dest.x
mul     dest,   src,    dest.x

nrm     r0,     v0

	1	2	3	4	5	6	7	8	9	10	11	12	13
dp4	read	MUL	ADD	ADD	post	write
rsq		STALL				read	RCP / RSQ		post	write
mul							STALL			read	MUL	post	write

2011/12/20

Initial version.