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struct
{
int input;
int output;
}
ffstesttab[] =
{
#if __INT_MAX__ >= 2147483647
/* at least 32-bit integers */
{ 0x80000000, 32 },
{ 0xa5a5a5a5, 1 },
{ 0x5a5a5a5a, 2 },
{ 0xcafe0000, 18 },
#endif
#if __INT_MAX__ >= 32767
/* at least 16-bit integers */
{ 0x8000, 16 },
{ 0xa5a5, 1 },
{ 0x5a5a, 2 },
{ 0x0ca0, 6 },
#endif
#if __INT_MAX__ < 32767
#error integers are too small
#endif
};
#define NFFSTESTS (sizeof (ffstesttab) / sizeof (ffstesttab[0]))
extern void abort (void);
extern void exit (int);
int
main (void)
{
int i;
for (i = 0; i < NFFSTESTS; i++)
{
if (__builtin_ffs (ffstesttab[i].input) != ffstesttab[i].output)
abort ();
}
exit (0);
}
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