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

mul r0, t0.a, t2.a		; (N dot H)^16 * gloss value