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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
39 lines
626 B
C
39 lines
626 B
C
/*
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* Copyright (c) 2025 Robert Clausecker <[email protected]>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <limits.h>
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#include <stdbit.h>
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unsigned int
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stdc_count_zeros_uc(unsigned char x)
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{
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return (__builtin_popcount(x ^ UCHAR_MAX));
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}
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unsigned int
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stdc_count_zeros_us(unsigned short x)
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{
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return (__builtin_popcount(x ^ USHRT_MAX));
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}
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unsigned int
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stdc_count_zeros_ui(unsigned int x)
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{
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return (__builtin_popcount(~x));
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}
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unsigned int
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stdc_count_zeros_ul(unsigned long x)
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{
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return (__builtin_popcountl(~x));
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}
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unsigned int
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stdc_count_zeros_ull(unsigned long long x)
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{
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return (__builtin_popcountll(~x));
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}
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