1 /* Test __builtin_bswap64 . */
2 
3 unsigned long long g(unsigned long long a) __attribute__((noinline));
g(unsigned long long a)4 unsigned long long g(unsigned long long a)
5 {
6   return __builtin_bswap64(a);
7 }
8 
9 
f(unsigned long long c)10 unsigned long long f(unsigned long long c)
11 {
12   union {
13     unsigned long long a;
14     unsigned char b[8];
15   } a, b;
16   a.a = c;
17   b.b[0] = a.b[7];
18   b.b[1] = a.b[6];
19   b.b[2] = a.b[5];
20   b.b[3] = a.b[4];
21   b.b[4] = a.b[3];
22   b.b[5] = a.b[2];
23   b.b[6] = a.b[1];
24   b.b[7] = a.b[0];
25   return b.a;
26 }
27 
main(void)28 int main(void)
29 {
30   unsigned long long i;
31   /* The rest of the testcase assumes 8 byte long long. */
32   if (sizeof(i) != sizeof(char)*8)
33     return 0;
34   if (f(0x12) != g(0x12))
35     __builtin_abort();
36   if (f(0x1234) != g(0x1234))
37     __builtin_abort();
38   if (f(0x123456) != g(0x123456))
39     __builtin_abort();
40   if (f(0x12345678ull) != g(0x12345678ull))
41     __builtin_abort();
42   if (f(0x1234567890ull) != g(0x1234567890ull))
43     __builtin_abort();
44   if (f(0x123456789012ull) != g(0x123456789012ull))
45     __builtin_abort();
46   if (f(0x12345678901234ull) != g(0x12345678901234ull))
47     __builtin_abort();
48   if (f(0x1234567890123456ull) != g(0x1234567890123456ull))
49     __builtin_abort();
50   return 0;
51 }
52