4  * SPDX-License-Identifier: BSD-2-Clause
11 /* Offset must be greater than zero. */
16 stdc_leading_zeros_uc(unsigned char x)  in stdc_leading_zeros_uc()  argument
18 	const int offset = UINT_WIDTH - UCHAR_WIDTH;  in stdc_leading_zeros_uc()  local
20 	return (__builtin_clz((x << offset) + (1U << (offset - 1))));  in stdc_leading_zeros_uc()
23 /* Offset must be greater than zero. */
28 stdc_leading_zeros_us(unsigned short x)  in stdc_leading_zeros_us()  argument
30 	const int offset = UINT_WIDTH - USHRT_WIDTH;  in stdc_leading_zeros_us()  local
32 	return (__builtin_clz((x << offset) + (1U << (offset - 1))));  in stdc_leading_zeros_us()
36 stdc_leading_zeros_ui(unsigned int x)  in stdc_leading_zeros_ui()  argument
38 	if (x == 0)  in stdc_leading_zeros_ui()
41 	return (__builtin_clz(x));  in stdc_leading_zeros_ui()
45 stdc_leading_zeros_ul(unsigned long x)  in stdc_leading_zeros_ul()  argument
47 	if (x == 0)  in stdc_leading_zeros_ul()
50 	return (__builtin_clzl(x));  in stdc_leading_zeros_ul()
54 stdc_leading_zeros_ull(unsigned long long x)  in stdc_leading_zeros_ull()  argument
56 	if (x == 0)  in stdc_leading_zeros_ull()
59 	return (__builtin_clzll(x));  in stdc_leading_zeros_ull()