Implementation
static const List<int> BITSCALE_8_TO_5_CEIL = [
0,
1,
1,
1,
1,
1,
1,
1,
1,
2,
2,
2,
2,
2,
2,
2,
2,
3,
3,
3,
3,
3,
3,
3,
3,
4,
4,
4,
4,
4,
4,
4,
4,
5,
5,
5,
5,
5,
5,
5,
5,
5,
6,
6,
6,
6,
6,
6,
6,
6,
7,
7,
7,
7,
7,
7,
7,
7,
8,
8,
8,
8,
8,
8,
8,
8,
9,
9,
9,
9,
9,
9,
9,
9,
9,
10,
10,
10,
10,
10,
10,
10,
10,
11,
11,
11,
11,
11,
11,
11,
11,
12,
12,
12,
12,
12,
12,
12,
12,
13,
13,
13,
13,
13,
13,
13,
13,
14,
14,
14,
14,
14,
14,
14,
14,
14,
15,
15,
15,
15,
15,
15,
15,
15,
16,
16,
16,
16,
16,
16,
16,
16,
17,
17,
17,
17,
17,
17,
17,
17,
18,
18,
18,
18,
18,
18,
18,
18,
18,
19,
19,
19,
19,
19,
19,
19,
19,
20,
20,
20,
20,
20,
20,
20,
20,
21,
21,
21,
21,
21,
21,
21,
21,
22,
22,
22,
22,
22,
22,
22,
22,
23,
23,
23,
23,
23,
23,
23,
23,
23,
24,
24,
24,
24,
24,
24,
24,
24,
25,
25,
25,
25,
25,
25,
25,
25,
26,
26,
26,
26,
26,
26,
26,
26,
27,
27,
27,
27,
27,
27,
27,
27,
27,
28,
28,
28,
28,
28,
28,
28,
28,
29,
29,
29,
29,
29,
29,
29,
29,
30,
30,
30,
30,
30,
30,
30,
30,
31,
31,
31,
31,
31,
31,
31,
31,
31
];