xref: /freebsd/lib/libc/tests/stdbit/stdc_bit_floor_test.c (revision 2fb8cbc6ef1b3cc6cd60e5db07f8305623f9b044) 
1 /*
2  * Copyright (c) 2025 Robert Clausecker <fuz@FreeBSD.org>
3  *
4  * SPDX-License-Identifier: BSD-2-Clause
5  */
6 
7 #define FUNCSTEM stdc_bit_floor
8 #define MKREFFUNC(name, type)						\
9 	static type 							\
10 	name(type value) 						\
11 	{ 								\
12 		type floor = 1;						\
13 									\
14 		if (value == 0)						\
15 			return (0);					\
16 									\
17 		while (value != 1) {					\
18 			floor <<= 1;					\
19 			value >>= 1;					\
20 		}							\
21 									\
22 		return (floor);						\
23 	}
24 
25 #include "stdbit-test-framework.c"
26