ffsll
int ffsll(long long) __constfunc;
ATF_CHECK_EQ_MSG((n = ffsll(0)), 0x00, "n=%d", n);
ATF_CHECK_EQ_MSG((n = ffsll(ULLONG_MAX)), 0x01, "n=%d\n", n);
ATF_CHECK_EQ_MSG((n = ffsll((unsigned long long)LLONG_MAX + 1)),
ATF_CHECK_EQ_MSG((n = ffsll(1ULL << i)), i + 1,
ATF_CHECK_EQ_MSG((n = ffsll(bits[i].val)), (m = bits[i].ffs),
ATF_CHECK_EQ_MSG((n = ffsll(bits[i].val << 1)),
ATF_CHECK_EQ_MSG((n = ffsll(bits[i].val << 9)),