mirror of
https://github.com/freebsd/freebsd-src.git
synced 2026-10-28 11:25:21 +01:00
Robert Clausecker
6296500a85
This new header complies with ISO/IEC 9899:2024 (C23). Contrary to glibc, we do not provide inline definitions in <stdbit.h> as we expect our system compiler to soon recognise these as builtins anyway. Relnotes: yes MFC after: 1 month Reviewed by: adrian Approved by: markj (mentor) Differential Revision: https://reviews.freebsd.org/D53657
53 lines
749 B
C
53 lines
749 B
C
/*
|
|
* Copyright (c) 2025 Robert Clausecker <[email protected]>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <stdbit.h>
|
|
|
|
unsigned int
|
|
stdc_first_trailing_one_uc(unsigned char x)
|
|
{
|
|
if (x == 0)
|
|
return (0);
|
|
|
|
return (__builtin_ctz(x) + 1);
|
|
}
|
|
|
|
unsigned int
|
|
stdc_first_trailing_one_us(unsigned short x)
|
|
{
|
|
if (x == 0)
|
|
return (0);
|
|
|
|
return (__builtin_ctz(x) + 1);
|
|
}
|
|
|
|
unsigned int
|
|
stdc_first_trailing_one_ui(unsigned int x)
|
|
{
|
|
if (x == 0)
|
|
return (0);
|
|
|
|
return (__builtin_ctz(x) + 1);
|
|
}
|
|
|
|
unsigned int
|
|
stdc_first_trailing_one_ul(unsigned long x)
|
|
{
|
|
if (x == 0)
|
|
return (0);
|
|
|
|
return (__builtin_ctzl(x) + 1);
|
|
}
|
|
|
|
unsigned int
|
|
stdc_first_trailing_one_ull(unsigned long long x)
|
|
{
|
|
if (x == 0)
|
|
return (0);
|
|
|
|
return (__builtin_ctzll(x) + 1);
|
|
}
|