ps_2_0
// tex0
//  c0 - sdx,sdy
dcl t0
dcl_2d s0
def c1,0.2,0,0,0
rcp r0.x,c0.x
rcp r0.y,c0.y
texld r2,t0,s0
mov r1,t0
add r1.x,r1.x,r0.x
texld r3,r1,s0
add r2,r2,r3
//
mov r1,t0
sub r1.x,r1.x,r0.x
texld r3,r1,s0
add r2,r2,r3
//
mov r1,t0
add r1.y,r1.y,r0.y
texld r3,r1,s0
add r2,r2,r3
//
mov r1,t0
sub r1.y,r1.y,r0.y
texld r4,r1,s0
add r2,r2,r4
//
mul r2,r2,c1.x
mov oC0,r2
