sub - Subtract

sub     dest, src0, src1

Name	Registers
dest	An output register or temporary register.
src0	A temporary register, input register, or floating-point constant register.
src1	A temporary register, input register, or floating-point constant register.

You cannot specify a floating-point constant register for both src0 and src1.
You cannot specify input registers using different indices for src0 and src1 at the same time.

Stores the difference between src0 and src1 in dest.

dest.x = src0.x - src1.x
dest.y = src0.y - src1.y
dest.z = src0.z - src1.z
dest.w = src0.w - src1.w

add     dest, src0, -src1

sub     r0,    c1,      v2
sub     o0.xy, r7.yzww, c4.xxyz

	1	2	3	4
add	read	ADD	post	write

2011/12/20

Initial version.