xps.1.1

tex t0					; normal map + gloss map

texm3x2pad t1, t0_bx2   ; u = t0 dot (t1) light vector
texm3x2tex t2, t0_bx2   ; v = t0 dot (t2) half vector
						; fetch texture 4 at u, v
						; t2.a = (N dot H)^16
						
tex t3					; ranged point light vector

mul_x4 r1, t0.a, t2.a		; (N dot H)^16 * gloss value

; Factor in falloff
mul r0.rgb, r1, t3.a