    ps_1_1
    def c3, 0.5, 0, 0, 0
    def c4, 0, 1, 1, 1
    def c5, 1, 0, 0, 0
    def c6, 0, 0, 1, 0
    def c7, 0.5, 0.5, 0.5, 0.5
    tex t0
    tex t1
    tex t2
    tex t3
    sub r0.xyz, t1, t0
  + sub r0.w, t2.w, t0.w
    sub r1.xyz, c7, t0
  + sub r1.w, t3.w, t0.w
    mad r1.xyz, r1, c2, r0
  + add r1.w, r1.w, r0.w
    add r1, r1, r1.w
    dp3 r1, r1, c6
    mad r1, r1, c5, c3
    mad r0, t0, c4, r1