diff options
Diffstat (limited to 'lib/libc/tests/stdbit/stdc_first_leading_one_test.c')
| -rw-r--r-- | lib/libc/tests/stdbit/stdc_first_leading_one_test.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/libc/tests/stdbit/stdc_first_leading_one_test.c b/lib/libc/tests/stdbit/stdc_first_leading_one_test.c new file mode 100644 index 000000000000..7312789262ea --- /dev/null +++ b/lib/libc/tests/stdbit/stdc_first_leading_one_test.c @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2025 Robert Clausecker <fuz@FreeBSD.org> + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#define FUNCSTEM stdc_first_leading_one +#define MKREFFUNC(name, type) \ + static unsigned \ + name(type value) \ + { \ + type bit = 1; \ + unsigned pos = 1; \ + \ + if (value == 0) \ + return (0); \ + \ + while ((type)(bit << 1) != 0) \ + bit <<= 1; \ + \ + while ((bit & value) == 0) { \ + bit >>= 1; \ + pos++; \ + } \ + \ + return (pos); \ + } + +#include "stdbit-test-framework.c" |