8 registers, 22 instructions:
0	r0 = uniform32 ptr0 4
1	r1 = uniform32 ptr0 8
2	r2 = uniform32 ptr0 C
3	r3 = splat 0 (0)
4	r4 = splat FFFFFFFF (nan)
5	r5 = neq_f32 r0 r3
6	r6 = splat 3F800000 (1)
7	r6 = bit_and r2 r6
8	r7 = to_f32 r1
9	r7 = select r5 r6 r7
10	r3 = eq_i32 r1 r3
11	r3 = bit_xor r4 r3
12	r4 = splat 1 (1.4012985e-45)
13	r4 = bit_and r2 r4
14	r0 = trunc r0
15	r0 = select r3 r4 r0
16	r0 = to_f32 r0
17	r0 = mul_f32 r7 r0
loop:
18	    store32 ptr1 r0
19	    store32 ptr2 r0
20	    store32 ptr3 r0
21	    store32 ptr4 r0