A8 over A8
7 registers, 15 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat 3F800000 (1)
r2 = splat 437F0000 (255)
r3 = splat 3F000000 (0.5)
loop:
r4 = load8 arg(0)
r4 = to_f32 r4
r4 = mul_f32 r0 r4
r5 = load8 arg(1)
r5 = to_f32 r5
r5 = mul_f32 r0 r5
r6 = sub_f32 r1 r4
r6 = mad_f32 r5 r6 r4
r6 = mad_f32 r6 r2 r3
r6 = to_i32 r6
store8 arg(1) r6

A8 over G8
9 registers, 21 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat 3F800000 (1)
r2 = splat 3E59B3D0 (0.21259999)
r3 = splat 3F371759 (0.71520001)
r4 = splat 3D93DD98 (0.0722)
r5 = splat 437F0000 (255)
r6 = splat 3F000000 (0.5)
loop:
r7 = load8 arg(0)
r7 = to_f32 r7
r7 = mul_f32 r0 r7
r8 = load8 arg(1)
r8 = to_f32 r8
r8 = mul_f32 r0 r8
r7 = sub_f32 r1 r7
r7 = mul_f32 r8 r7
r8 = mul_f32 r7 r4
r8 = mad_f32 r7 r3 r8
r8 = mad_f32 r7 r2 r8
r8 = mad_f32 r8 r5 r6
r8 = to_i32 r8
store8 arg(1) r8

A8 over RGBA_8888
11 registers, 38 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat FF (3.5733111e-43)
r2 = splat 3F800000 (1)
r3 = splat 437F0000 (255)
r4 = splat 3F000000 (0.5)
loop:
r5 = load8 arg(0)
r5 = to_f32 r5
r5 = mul_f32 r0 r5
r6 = load32 arg(1)
r7 = extract r6 0 r1
r7 = to_f32 r7
r7 = mul_f32 r0 r7
r8 = extract r6 8 r1
r8 = to_f32 r8
r8 = mul_f32 r0 r8
r9 = extract r6 16 r1
r9 = to_f32 r9
r9 = mul_f32 r0 r9
r6 = extract r6 24 r1
r6 = to_f32 r6
r6 = mul_f32 r0 r6
r10 = sub_f32 r2 r5
r7 = mul_f32 r7 r10
r8 = mul_f32 r8 r10
r9 = mul_f32 r9 r10
r10 = mad_f32 r6 r10 r5
r7 = mad_f32 r7 r3 r4
r7 = to_i32 r7
r8 = mad_f32 r8 r3 r4
r8 = to_i32 r8
r9 = mad_f32 r9 r3 r4
r9 = to_i32 r9
r10 = mad_f32 r10 r3 r4
r10 = to_i32 r10
r8 = pack r7 r8 8
r10 = pack r9 r10 8
r10 = pack r8 r10 16
store32 arg(1) r10

G8 over A8
6 registers, 12 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat 3F800000 (1)
r2 = sub_f32 r1 r1
r3 = splat 437F0000 (255)
r4 = splat 3F000000 (0.5)
loop:
r5 = load8 arg(1)
r5 = to_f32 r5
r5 = mul_f32 r0 r5
r5 = mad_f32 r5 r2 r1
r5 = mad_f32 r5 r3 r4
r5 = to_i32 r5
store8 arg(1) r5

G8 over G8
10 registers, 21 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat 3F800000 (1)
r2 = sub_f32 r1 r1
r3 = splat 3E59B3D0 (0.21259999)
r4 = splat 3F371759 (0.71520001)
r5 = splat 3D93DD98 (0.0722)
r6 = splat 437F0000 (255)
r7 = splat 3F000000 (0.5)
loop:
r8 = load8 arg(0)
r8 = to_f32 r8
r8 = mul_f32 r0 r8
r9 = load8 arg(1)
r9 = to_f32 r9
r9 = mul_f32 r0 r9
r9 = mad_f32 r9 r2 r8
r8 = mul_f32 r9 r5
r8 = mad_f32 r9 r4 r8
r8 = mad_f32 r9 r3 r8
r8 = mad_f32 r8 r6 r7
r8 = to_i32 r8
store8 arg(1) r8

G8 over RGBA_8888
11 registers, 38 instructions:
r0 = splat 3B808081 (0.0039215689)
r1 = splat 3F800000 (1)
r2 = splat FF (3.5733111e-43)
r3 = sub_f32 r1 r1
r4 = splat 437F0000 (255)
r5 = splat 3F000000 (0.5)
loop:
r6 = load8 arg(0)
r6 = to_f32 r6
r6 = mul_f32 r0 r6
r7 = load32 arg(1)
r8 = extract r7 0 r2
r8 = to_f32 r8
r8 = mul_f32 r0 r8
r9 = extract r7 8 r2
r9 = to_f32 r9
r9 = mul_f32 r0 r9
r10 = extract r7 16 r2
r10 = to_f32 r10
r10 = mul_f32 r0 r10
r7 = extract r7 24 r2
r7 = to_f32 r7
r7 = mul_f32 r0 r7
r8 = mad_f32 r8 r3 r6
r9 = mad_f32 r9 r3 r6
r10 = mad_f32 r10 r3 r6
r7 = mad_f32 r7 r3 r1
r8 = mad_f32 r8 r4 r5
r8 = to_i32 r8
r9 = mad_f32 r9 r4 r5
r9 = to_i32 r9
r10 = mad_f32 r10 r4 r5
r10 = to_i32 r10
r7 = mad_f32 r7 r4 r5
r7 = to_i32 r7
r9 = pack r8 r9 8
r7 = pack r10 r7 8
r7 = pack r9 r7 16
store32 arg(1) r7

RGBA_8888 over A8
8 registers, 17 instructions:
r0 = splat FF (3.5733111e-43)
r1 = splat 3B808081 (0.0039215689)
r2 = splat 3F800000 (1)
r3 = splat 437F0000 (255)
r4 = splat 3F000000 (0.5)
loop:
r5 = load32 arg(0)
r5 = extract r5 24 r0
r5 = to_f32 r5
r5 = mul_f32 r1 r5
r6 = load8 arg(1)
r6 = to_f32 r6
r6 = mul_f32 r1 r6
r7 = sub_f32 r2 r5
r7 = mad_f32 r6 r7 r5
r7 = mad_f32 r7 r3 r4
r7 = to_i32 r7
store8 arg(1) r7

RGBA_8888 over G8
13 registers, 34 instructions:
r0 = splat FF (3.5733111e-43)
r1 = splat 3B808081 (0.0039215689)
r2 = splat 3F800000 (1)
r3 = splat 3E59B3D0 (0.21259999)
r4 = splat 3F371759 (0.71520001)
r5 = splat 3D93DD98 (0.0722)
r6 = splat 437F0000 (255)
r7 = splat 3F000000 (0.5)
loop:
r8 = load32 arg(0)
r9 = extract r8 0 r0
r9 = to_f32 r9
r9 = mul_f32 r1 r9
r10 = extract r8 8 r0
r10 = to_f32 r10
r10 = mul_f32 r1 r10
r11 = extract r8 16 r0
r11 = to_f32 r11
r11 = mul_f32 r1 r11
r8 = extract r8 24 r0
r8 = to_f32 r8
r8 = mul_f32 r1 r8
r12 = load8 arg(1)
r12 = to_f32 r12
r12 = mul_f32 r1 r12
r8 = sub_f32 r2 r8
r9 = mad_f32 r12 r8 r9
r10 = mad_f32 r12 r8 r10
r8 = mad_f32 r12 r8 r11
r8 = mul_f32 r8 r5
r8 = mad_f32 r10 r4 r8
r8 = mad_f32 r9 r3 r8
r8 = mad_f32 r8 r6 r7
r8 = to_i32 r8
store8 arg(1) r8

RGBA_8888 over RGBA_8888
14 registers, 48 instructions:
r0 = splat FF (3.5733111e-43)
r1 = splat 3B808081 (0.0039215689)
r2 = splat 3F800000 (1)
r3 = splat 437F0000 (255)
r4 = splat 3F000000 (0.5)
loop:
r5 = load32 arg(0)
r6 = extract r5 0 r0
r6 = to_f32 r6
r6 = mul_f32 r1 r6
r7 = extract r5 8 r0
r7 = to_f32 r7
r7 = mul_f32 r1 r7
r8 = extract r5 16 r0
r8 = to_f32 r8
r8 = mul_f32 r1 r8
r5 = extract r5 24 r0
r5 = to_f32 r5
r5 = mul_f32 r1 r5
r9 = load32 arg(1)
r10 = extract r9 0 r0
r10 = to_f32 r10
r10 = mul_f32 r1 r10
r11 = extract r9 8 r0
r11 = to_f32 r11
r11 = mul_f32 r1 r11
r12 = extract r9 16 r0
r12 = to_f32 r12
r12 = mul_f32 r1 r12
r9 = extract r9 24 r0
r9 = to_f32 r9
r9 = mul_f32 r1 r9
r13 = sub_f32 r2 r5
r10 = mad_f32 r10 r13 r6
r11 = mad_f32 r11 r13 r7
r12 = mad_f32 r12 r13 r8
r13 = mad_f32 r9 r13 r5
r10 = mad_f32 r10 r3 r4
r10 = to_i32 r10
r11 = mad_f32 r11 r3 r4
r11 = to_i32 r11
r12 = mad_f32 r12 r3 r4
r12 = to_i32 r12
r13 = mad_f32 r13 r3 r4
r13 = to_i32 r13
r11 = pack r10 r11 8
r13 = pack r12 r13 8
r13 = pack r11 r13 16
store32 arg(1) r13

I32 8888 over 8888
10 registers, 20 instructions:
r0 = splat FF (3.5733111e-43)
loop:
r1 = load32 arg(0)
r2 = extract r1 0 r0
r3 = extract r1 8 r0
r4 = extract r1 16 r0
r1 = extract r1 24 r0
r5 = load32 arg(1)
r6 = extract r5 0 r0
r7 = extract r5 8 r0
r8 = extract r5 16 r0
r5 = extract r5 24 r0
r9 = sub_i32 r0 r1
r6 = mad_unorm8 r6 r9 r2
r7 = mad_unorm8 r7 r9 r3
r8 = mad_unorm8 r8 r9 r4
r9 = mad_unorm8 r5 r9 r1
r7 = pack r6 r7 8
r9 = pack r8 r9 8
r9 = pack r7 r9 16
store32 arg(1) r9

I32 (SWAR) 8888 over 8888
7 registers, 20 instructions:
r0 = splat FF00FF (2.3418409e-38)
r1 = splat FF (3.5733111e-43)
loop:
r2 = load32 arg(0)
r3 = extract r2 0 r0
r2 = extract r2 8 r0
r4 = load32 arg(1)
r5 = extract r4 0 r0
r4 = extract r4 8 r0
r6 = shr r2 16
r6 = sub_i32 r1 r6
r5 = mul_i32 r5 r6
r5 = add_i32 r5 r0
r5 = extract r5 8 r0
r5 = add_i32 r3 r5
r6 = mul_i32 r4 r6
r6 = add_i32 r6 r0
r6 = extract r6 8 r0
r6 = add_i32 r2 r6
r6 = pack r5 r6 8
store32 arg(1) r6