1 typedef unsigned int u32;
2
3 static const u32 deadfish = 0xdeadf155;
4
5 static const u32 cfb_tab8_be[] = {
6 0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
7 0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
8 0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
9 0xffff0000,0xffff00ff,0xffffff00,0xffffffff
10 };
11
12 static const u32 cfb_tab8_le[] = {
13 0x00000000,0xff000000,0x00ff0000,0xffff0000,
14 0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
15 0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
16 0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
17 };
18
19 static const u32 cfb_tab16_be[] = {
20 0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
21 };
22
23 static const u32 cfb_tab16_le[] = {
24 0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
25 };
26
27 static const u32 cfb_tab32[] = {
28 0x00000000, 0xffffffff
29 };
30
31
32
33
34
35
xxx(int bpp)36 const u32 *xxx(int bpp)
37 {
38 const u32 *tab;
39
40 if (0) return &deadfish;
41
42 switch (bpp) {
43 case 8:
44 tab = cfb_tab8_be;
45 break;
46 case 16:
47 tab = cfb_tab16_be;
48 break;
49 case 32:
50 default:
51 tab = cfb_tab32;
52 break;
53 }
54
55 return tab;
56 }
57
main(void)58 int main(void)
59 {
60 const u32 *a = xxx(8);
61 int b = a[0];
62 if (b != cfb_tab8_be[0])
63 __builtin_abort ();
64 return 0;
65 }
66