TEX
temp[1].rgba = LD tex[0] temp[0].rgaa ;

TEX TEX_SEM_ACQUIRE
temp[2].rgba = LD tex[1] temp[0].rgaa ;

-- (temp[0].rrrr * (temp[2].rgba - temp[1].rgba)) + temp[1].rgba
OUT TEX_SEM_WAIT
src0.a = temp[1],
src1.a = temp[2],
srcp.a = sub,
src0.rgb = temp[1],
src1.rgb = temp[2],
src2.rgb = temp[0],
srcp.rgb = sub :
  out[0].a    = MAD src2.r srcp.a src0.a ,
  out[0].rgb  = MAD src2.rrr srcp.rgb src0.rgb ;