mirror of
https://sourceware.org/git/glibc.git
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1b9c1a0047
The following patch uses the GCC 14 __builtin_stdc_* builtins in stdbit.h
for the type-generic macros, so that when compiled with GCC 14 or later,
it supports not just 8/16/32/64-bit unsigned integers, but also 128-bit
(if target supports them) and unsigned _BitInt (any supported precision).
And so that the macros don't expand arguments multiple times and can be
evaluated in constant expressions.
The new testcase is gcc's gcc/testsuite/gcc.dg/builtin-stdc-bit-1.c
adjusted to test stdbit.h and the type-generic macros in there instead
of the builtins and adjusted to use glibc test framework rather than
gcc style tests with __builtin_abort ().
Signed-off-by: Jakub Jelinek <jakub@redhat.com>
Reviewed-by: Joseph Myers <josmyers@redhat.com>
(cherry picked from commit da89496337)
849 lines
26 KiB
C
849 lines
26 KiB
C
/* ISO C23 Standard: 7.18 - Bit and byte utilities <stdbit.h>.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _STDBIT_H
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#define _STDBIT_H 1
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#include <features.h>
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#include <bits/endian.h>
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#include <bits/stdint-intn.h>
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#include <bits/stdint-uintn.h>
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#include <bits/stdint-least.h>
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/* In C23, <stdbool.h> defines only an implementation-namespace macro,
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so is OK to include here. Before C23, including <stdbool.h> allows
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the header to use bool rather than _Bool unconditionally, and so to
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compile as C++ (although the type-generic macros are not a good
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form of type-generic interface for C++). */
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#include <stdbool.h>
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#define __need_size_t
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#include <stddef.h>
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#define __STDC_VERSION_STDBIT_H__ 202311L
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#define __STDC_ENDIAN_LITTLE__ __LITTLE_ENDIAN
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#define __STDC_ENDIAN_BIG__ __BIG_ENDIAN
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#define __STDC_ENDIAN_NATIVE__ __BYTE_ORDER
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__BEGIN_DECLS
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/* Use __pacify_uint16 (N) instead of (uint16_t) (N) when the cast is helpful
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only to pacify older GCC (e.g., GCC 10 -Wconversion) or non-GCC (e.g
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clang -Wimplicit-int-conversion). */
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#if __GNUC_PREREQ (11, 0)
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# define __pacify_uint8(n) (n)
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# define __pacify_uint16(n) (n)
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#else
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# define __pacify_uint8(n) ((uint8_t) (n))
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# define __pacify_uint16(n) ((uint16_t) (n))
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#endif
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/* Count leading zeros. */
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extern unsigned int stdc_leading_zeros_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_zeros_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_zeros_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_zeros_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_leading_zeros_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_leading_zeros)
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# define stdc_leading_zeros(x) (__builtin_stdc_leading_zeros (x))
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#else
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# define stdc_leading_zeros(x) \
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(stdc_leading_zeros_ull (x) \
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- (unsigned int) (8 * (sizeof (0ULL) - sizeof (x))))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
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static __always_inline unsigned int
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__clz64_inline (uint64_t __x)
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{
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return __x == 0 ? 64U : (unsigned int) __builtin_clzll (__x);
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}
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static __always_inline unsigned int
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__clz32_inline (uint32_t __x)
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{
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return __x == 0 ? 32U : (unsigned int) __builtin_clz (__x);
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}
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static __always_inline unsigned int
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__clz16_inline (uint16_t __x)
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{
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return __clz32_inline (__x) - 16;
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}
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static __always_inline unsigned int
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__clz8_inline (uint8_t __x)
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{
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return __clz32_inline (__x) - 24;
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}
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# define stdc_leading_zeros_uc(x) (__clz8_inline (x))
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# define stdc_leading_zeros_us(x) (__clz16_inline (x))
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# define stdc_leading_zeros_ui(x) (__clz32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_leading_zeros_ul(x) (__clz64_inline (x))
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# else
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# define stdc_leading_zeros_ul(x) (__clz32_inline (x))
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# endif
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# define stdc_leading_zeros_ull(x) (__clz64_inline (x))
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#endif
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/* Count leading ones. */
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extern unsigned int stdc_leading_ones_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_ones_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_ones_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_leading_ones_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_leading_ones_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_leading_ones)
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# define stdc_leading_ones(x) (__builtin_stdc_leading_ones (x))
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#else
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# define stdc_leading_ones(x) \
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(stdc_leading_ones_ull ((unsigned long long int) (x) \
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<< 8 * (sizeof (0ULL) - sizeof (x))))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
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static __always_inline unsigned int
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__clo64_inline (uint64_t __x)
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{
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return __clz64_inline (~__x);
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}
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static __always_inline unsigned int
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__clo32_inline (uint32_t __x)
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{
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return __clz32_inline (~__x);
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}
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static __always_inline unsigned int
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__clo16_inline (uint16_t __x)
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{
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return __clz16_inline (__pacify_uint16 (~__x));
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}
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static __always_inline unsigned int
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__clo8_inline (uint8_t __x)
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{
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return __clz8_inline (__pacify_uint8 (~__x));
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}
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# define stdc_leading_ones_uc(x) (__clo8_inline (x))
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# define stdc_leading_ones_us(x) (__clo16_inline (x))
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# define stdc_leading_ones_ui(x) (__clo32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_leading_ones_ul(x) (__clo64_inline (x))
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# else
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# define stdc_leading_ones_ul(x) (__clo32_inline (x))
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# endif
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# define stdc_leading_ones_ull(x) (__clo64_inline (x))
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#endif
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/* Count trailing zeros. */
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extern unsigned int stdc_trailing_zeros_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_zeros_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_zeros_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_zeros_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_trailing_zeros_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_trailing_zeros)
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# define stdc_trailing_zeros(x) (__builtin_stdc_trailing_zeros (x))
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#else
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# define stdc_trailing_zeros(x) \
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(sizeof (x) == 8 ? stdc_trailing_zeros_ull (x) \
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: sizeof (x) == 4 ? stdc_trailing_zeros_ui (x) \
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: sizeof (x) == 2 ? stdc_trailing_zeros_us (__pacify_uint16 (x)) \
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: stdc_trailing_zeros_uc (__pacify_uint8 (x)))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
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static __always_inline unsigned int
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__ctz64_inline (uint64_t __x)
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{
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return __x == 0 ? 64U : (unsigned int) __builtin_ctzll (__x);
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}
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static __always_inline unsigned int
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__ctz32_inline (uint32_t __x)
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{
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return __x == 0 ? 32U : (unsigned int) __builtin_ctz (__x);
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}
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static __always_inline unsigned int
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__ctz16_inline (uint16_t __x)
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{
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return __x == 0 ? 16U : (unsigned int) __builtin_ctz (__x);
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}
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static __always_inline unsigned int
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__ctz8_inline (uint8_t __x)
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{
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return __x == 0 ? 8U : (unsigned int) __builtin_ctz (__x);
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}
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# define stdc_trailing_zeros_uc(x) (__ctz8_inline (x))
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# define stdc_trailing_zeros_us(x) (__ctz16_inline (x))
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# define stdc_trailing_zeros_ui(x) (__ctz32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_trailing_zeros_ul(x) (__ctz64_inline (x))
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# else
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# define stdc_trailing_zeros_ul(x) (__ctz32_inline (x))
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# endif
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# define stdc_trailing_zeros_ull(x) (__ctz64_inline (x))
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#endif
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/* Count trailing ones. */
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extern unsigned int stdc_trailing_ones_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_ones_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_ones_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_trailing_ones_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_trailing_ones_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_trailing_ones)
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# define stdc_trailing_ones(x) (__builtin_stdc_trailing_ones (x))
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#else
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# define stdc_trailing_ones(x) (stdc_trailing_ones_ull (x))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
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static __always_inline unsigned int
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__cto64_inline (uint64_t __x)
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{
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return __ctz64_inline (~__x);
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}
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static __always_inline unsigned int
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__cto32_inline (uint32_t __x)
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{
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return __ctz32_inline (~__x);
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}
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static __always_inline unsigned int
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__cto16_inline (uint16_t __x)
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{
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return __ctz16_inline (__pacify_uint16 (~__x));
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}
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static __always_inline unsigned int
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__cto8_inline (uint8_t __x)
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{
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return __ctz8_inline (__pacify_uint8 (~__x));
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}
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# define stdc_trailing_ones_uc(x) (__cto8_inline (x))
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# define stdc_trailing_ones_us(x) (__cto16_inline (x))
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# define stdc_trailing_ones_ui(x) (__cto32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_trailing_ones_ul(x) (__cto64_inline (x))
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# else
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# define stdc_trailing_ones_ul(x) (__cto32_inline (x))
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# endif
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# define stdc_trailing_ones_ull(x) (__cto64_inline (x))
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#endif
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/* First leading zero. */
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extern unsigned int stdc_first_leading_zero_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_zero_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_zero_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_zero_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_first_leading_zero_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_first_leading_zero)
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# define stdc_first_leading_zero(x) (__builtin_stdc_first_leading_zero (x))
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#else
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# define stdc_first_leading_zero(x) \
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(sizeof (x) == 8 ? stdc_first_leading_zero_ull (x) \
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: sizeof (x) == 4 ? stdc_first_leading_zero_ui (x) \
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: sizeof (x) == 2 ? stdc_first_leading_zero_us (__pacify_uint16 (x)) \
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: stdc_first_leading_zero_uc (__pacify_uint8 (x)))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
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static __always_inline unsigned int
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__flz64_inline (uint64_t __x)
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{
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return __x == (uint64_t) -1 ? 0 : 1 + __clo64_inline (__x);
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}
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static __always_inline unsigned int
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__flz32_inline (uint32_t __x)
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{
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return __x == (uint32_t) -1 ? 0 : 1 + __clo32_inline (__x);
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}
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static __always_inline unsigned int
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__flz16_inline (uint16_t __x)
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{
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return __x == (uint16_t) -1 ? 0 : 1 + __clo16_inline (__x);
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}
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static __always_inline unsigned int
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__flz8_inline (uint8_t __x)
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{
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return __x == (uint8_t) -1 ? 0 : 1 + __clo8_inline (__x);
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}
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# define stdc_first_leading_zero_uc(x) (__flz8_inline (x))
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# define stdc_first_leading_zero_us(x) (__flz16_inline (x))
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# define stdc_first_leading_zero_ui(x) (__flz32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_first_leading_zero_ul(x) (__flz64_inline (x))
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# else
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# define stdc_first_leading_zero_ul(x) (__flz32_inline (x))
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# endif
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# define stdc_first_leading_zero_ull(x) (__flz64_inline (x))
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#endif
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/* First leading one. */
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extern unsigned int stdc_first_leading_one_uc (unsigned char __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_one_us (unsigned short __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_one_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_leading_one_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_first_leading_one_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_first_leading_one)
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# define stdc_first_leading_one(x) (__builtin_stdc_first_leading_one (x))
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#else
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# define stdc_first_leading_one(x) \
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(sizeof (x) == 8 ? stdc_first_leading_one_ull (x) \
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: sizeof (x) == 4 ? stdc_first_leading_one_ui (x) \
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: sizeof (x) == 2 ? stdc_first_leading_one_us (__pacify_uint16 (x)) \
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: stdc_first_leading_one_uc (__pacify_uint8 (x)))
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#endif
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#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
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static __always_inline unsigned int
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__flo64_inline (uint64_t __x)
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{
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return __x == 0 ? 0 : 1 + __clz64_inline (__x);
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}
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static __always_inline unsigned int
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__flo32_inline (uint32_t __x)
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{
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return __x == 0 ? 0 : 1 + __clz32_inline (__x);
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}
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|
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static __always_inline unsigned int
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__flo16_inline (uint16_t __x)
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{
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return __x == 0 ? 0 : 1 + __clz16_inline (__x);
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}
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static __always_inline unsigned int
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__flo8_inline (uint8_t __x)
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{
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return __x == 0 ? 0 : 1 + __clz8_inline (__x);
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}
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# define stdc_first_leading_one_uc(x) (__flo8_inline (x))
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# define stdc_first_leading_one_us(x) (__flo16_inline (x))
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# define stdc_first_leading_one_ui(x) (__flo32_inline (x))
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# if __WORDSIZE == 64
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# define stdc_first_leading_one_ul(x) (__flo64_inline (x))
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# else
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# define stdc_first_leading_one_ul(x) (__flo32_inline (x))
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# endif
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# define stdc_first_leading_one_ull(x) (__flo64_inline (x))
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#endif
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|
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/* First trailing zero. */
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extern unsigned int stdc_first_trailing_zero_uc (unsigned char __x)
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|
__THROW __attribute_const__;
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|
extern unsigned int stdc_first_trailing_zero_us (unsigned short __x)
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|
__THROW __attribute_const__;
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|
extern unsigned int stdc_first_trailing_zero_ui (unsigned int __x)
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__THROW __attribute_const__;
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extern unsigned int stdc_first_trailing_zero_ul (unsigned long int __x)
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__THROW __attribute_const__;
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__extension__
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extern unsigned int stdc_first_trailing_zero_ull (unsigned long long int __x)
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__THROW __attribute_const__;
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#if __glibc_has_builtin (__builtin_stdc_first_trailing_zero)
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# define stdc_first_trailing_zero(x) (__builtin_stdc_first_trailing_zero (x))
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#else
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# define stdc_first_trailing_zero(x) \
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(sizeof (x) == 8 ? stdc_first_trailing_zero_ull (x) \
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: sizeof (x) == 4 ? stdc_first_trailing_zero_ui (x) \
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|
: sizeof (x) == 2 ? stdc_first_trailing_zero_us (__pacify_uint16 (x)) \
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|
: stdc_first_trailing_zero_uc (__pacify_uint8 (x)))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
|
|
static __always_inline unsigned int
|
|
__ftz64_inline (uint64_t __x)
|
|
{
|
|
return __x == (uint64_t) -1 ? 0 : 1 + __cto64_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__ftz32_inline (uint32_t __x)
|
|
{
|
|
return __x == (uint32_t) -1 ? 0 : 1 + __cto32_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__ftz16_inline (uint16_t __x)
|
|
{
|
|
return __x == (uint16_t) -1 ? 0 : 1 + __cto16_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__ftz8_inline (uint8_t __x)
|
|
{
|
|
return __x == (uint8_t) -1 ? 0 : 1 + __cto8_inline (__x);
|
|
}
|
|
|
|
# define stdc_first_trailing_zero_uc(x) (__ftz8_inline (x))
|
|
# define stdc_first_trailing_zero_us(x) (__ftz16_inline (x))
|
|
# define stdc_first_trailing_zero_ui(x) (__ftz32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_first_trailing_zero_ul(x) (__ftz64_inline (x))
|
|
# else
|
|
# define stdc_first_trailing_zero_ul(x) (__ftz32_inline (x))
|
|
# endif
|
|
# define stdc_first_trailing_zero_ull(x) (__ftz64_inline (x))
|
|
#endif
|
|
|
|
/* First trailing one. */
|
|
extern unsigned int stdc_first_trailing_one_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_first_trailing_one_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_first_trailing_one_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_first_trailing_one_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned int stdc_first_trailing_one_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_first_trailing_one)
|
|
# define stdc_first_trailing_one(x) (__builtin_stdc_first_trailing_one (x))
|
|
#else
|
|
# define stdc_first_trailing_one(x) \
|
|
(sizeof (x) == 8 ? stdc_first_trailing_one_ull (x) \
|
|
: sizeof (x) == 4 ? stdc_first_trailing_one_ui (x) \
|
|
: sizeof (x) == 2 ? stdc_first_trailing_one_us (__pacify_uint16 (x)) \
|
|
: stdc_first_trailing_one_uc (__pacify_uint8 (x)))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
|
|
static __always_inline unsigned int
|
|
__fto64_inline (uint64_t __x)
|
|
{
|
|
return __x == 0 ? 0 : 1 + __ctz64_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__fto32_inline (uint32_t __x)
|
|
{
|
|
return __x == 0 ? 0 : 1 + __ctz32_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__fto16_inline (uint16_t __x)
|
|
{
|
|
return __x == 0 ? 0 : 1 + __ctz16_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__fto8_inline (uint8_t __x)
|
|
{
|
|
return __x == 0 ? 0 : 1 + __ctz8_inline (__x);
|
|
}
|
|
|
|
# define stdc_first_trailing_one_uc(x) (__fto8_inline (x))
|
|
# define stdc_first_trailing_one_us(x) (__fto16_inline (x))
|
|
# define stdc_first_trailing_one_ui(x) (__fto32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_first_trailing_one_ul(x) (__fto64_inline (x))
|
|
# else
|
|
# define stdc_first_trailing_one_ul(x) (__fto32_inline (x))
|
|
# endif
|
|
# define stdc_first_trailing_one_ull(x) (__fto64_inline (x))
|
|
#endif
|
|
|
|
/* Count zeros. */
|
|
extern unsigned int stdc_count_zeros_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_zeros_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_zeros_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_zeros_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned int stdc_count_zeros_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_count_zeros)
|
|
# define stdc_count_zeros(x) (__builtin_stdc_count_zeros (x))
|
|
#else
|
|
# define stdc_count_zeros(x) \
|
|
(stdc_count_zeros_ull (x) \
|
|
- (unsigned int) (8 * (sizeof (0ULL) - sizeof (x))))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_popcountll)
|
|
static __always_inline unsigned int
|
|
__cz64_inline (uint64_t __x)
|
|
{
|
|
return 64U - (unsigned int) __builtin_popcountll (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__cz32_inline (uint32_t __x)
|
|
{
|
|
return 32U - (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__cz16_inline (uint16_t __x)
|
|
{
|
|
return 16U - (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__cz8_inline (uint8_t __x)
|
|
{
|
|
return 8U - (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
# define stdc_count_zeros_uc(x) (__cz8_inline (x))
|
|
# define stdc_count_zeros_us(x) (__cz16_inline (x))
|
|
# define stdc_count_zeros_ui(x) (__cz32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_count_zeros_ul(x) (__cz64_inline (x))
|
|
# else
|
|
# define stdc_count_zeros_ul(x) (__cz32_inline (x))
|
|
# endif
|
|
# define stdc_count_zeros_ull(x) (__cz64_inline (x))
|
|
#endif
|
|
|
|
/* Count ones. */
|
|
extern unsigned int stdc_count_ones_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_ones_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_ones_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_count_ones_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned int stdc_count_ones_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_count_ones)
|
|
# define stdc_count_ones(x) (__builtin_stdc_count_ones (x))
|
|
#else
|
|
# define stdc_count_ones(x) (stdc_count_ones_ull (x))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_popcountll)
|
|
static __always_inline unsigned int
|
|
__co64_inline (uint64_t __x)
|
|
{
|
|
return (unsigned int) __builtin_popcountll (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__co32_inline (uint32_t __x)
|
|
{
|
|
return (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__co16_inline (uint16_t __x)
|
|
{
|
|
return (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__co8_inline (uint8_t __x)
|
|
{
|
|
return (unsigned int) __builtin_popcount (__x);
|
|
}
|
|
|
|
# define stdc_count_ones_uc(x) (__co8_inline (x))
|
|
# define stdc_count_ones_us(x) (__co16_inline (x))
|
|
# define stdc_count_ones_ui(x) (__co32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_count_ones_ul(x) (__co64_inline (x))
|
|
# else
|
|
# define stdc_count_ones_ul(x) (__co32_inline (x))
|
|
# endif
|
|
# define stdc_count_ones_ull(x) (__co64_inline (x))
|
|
#endif
|
|
|
|
/* Single-bit check. */
|
|
extern bool stdc_has_single_bit_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern bool stdc_has_single_bit_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern bool stdc_has_single_bit_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern bool stdc_has_single_bit_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern bool stdc_has_single_bit_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_has_single_bit)
|
|
# define stdc_has_single_bit(x) (__builtin_stdc_has_single_bit (x))
|
|
#else
|
|
# define stdc_has_single_bit(x) \
|
|
((bool) (sizeof (x) <= sizeof (unsigned int) \
|
|
? stdc_has_single_bit_ui (x) \
|
|
: stdc_has_single_bit_ull (x)))
|
|
#endif
|
|
|
|
static __always_inline bool
|
|
__hsb64_inline (uint64_t __x)
|
|
{
|
|
return (__x ^ (__x - 1)) > __x - 1;
|
|
}
|
|
|
|
static __always_inline bool
|
|
__hsb32_inline (uint32_t __x)
|
|
{
|
|
return (__x ^ (__x - 1)) > __x - 1;
|
|
}
|
|
|
|
static __always_inline bool
|
|
__hsb16_inline (uint16_t __x)
|
|
{
|
|
return (__x ^ (__x - 1)) > __x - 1;
|
|
}
|
|
|
|
static __always_inline bool
|
|
__hsb8_inline (uint8_t __x)
|
|
{
|
|
return (__x ^ (__x - 1)) > __x - 1;
|
|
}
|
|
|
|
#define stdc_has_single_bit_uc(x) (__hsb8_inline (x))
|
|
#define stdc_has_single_bit_us(x) (__hsb16_inline (x))
|
|
#define stdc_has_single_bit_ui(x) (__hsb32_inline (x))
|
|
#if __WORDSIZE == 64
|
|
# define stdc_has_single_bit_ul(x) (__hsb64_inline (x))
|
|
#else
|
|
# define stdc_has_single_bit_ul(x) (__hsb32_inline (x))
|
|
#endif
|
|
#define stdc_has_single_bit_ull(x) (__hsb64_inline (x))
|
|
|
|
/* Bit width. */
|
|
extern unsigned int stdc_bit_width_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_bit_width_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_bit_width_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_bit_width_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned int stdc_bit_width_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_bit_width)
|
|
# define stdc_bit_width(x) (__builtin_stdc_bit_width (x))
|
|
#else
|
|
# define stdc_bit_width(x) (stdc_bit_width_ull (x))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
|
|
static __always_inline unsigned int
|
|
__bw64_inline (uint64_t __x)
|
|
{
|
|
return 64 - __clz64_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__bw32_inline (uint32_t __x)
|
|
{
|
|
return 32 - __clz32_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__bw16_inline (uint16_t __x)
|
|
{
|
|
return 16 - __clz16_inline (__x);
|
|
}
|
|
|
|
static __always_inline unsigned int
|
|
__bw8_inline (uint8_t __x)
|
|
{
|
|
return 8 - __clz8_inline (__x);
|
|
}
|
|
|
|
# define stdc_bit_width_uc(x) (__bw8_inline (x))
|
|
# define stdc_bit_width_us(x) (__bw16_inline (x))
|
|
# define stdc_bit_width_ui(x) (__bw32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_bit_width_ul(x) (__bw64_inline (x))
|
|
# else
|
|
# define stdc_bit_width_ul(x) (__bw32_inline (x))
|
|
# endif
|
|
# define stdc_bit_width_ull(x) (__bw64_inline (x))
|
|
#endif
|
|
|
|
/* Bit floor. */
|
|
extern unsigned char stdc_bit_floor_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned short stdc_bit_floor_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_bit_floor_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned long int stdc_bit_floor_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned long long int stdc_bit_floor_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_bit_floor)
|
|
# define stdc_bit_floor(x) (__builtin_stdc_bit_floor (x))
|
|
#else
|
|
# define stdc_bit_floor(x) ((__typeof (x)) stdc_bit_floor_ull (x))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
|
|
static __always_inline uint64_t
|
|
__bf64_inline (uint64_t __x)
|
|
{
|
|
return __x == 0 ? 0 : ((uint64_t) 1) << (__bw64_inline (__x) - 1);
|
|
}
|
|
|
|
static __always_inline uint32_t
|
|
__bf32_inline (uint32_t __x)
|
|
{
|
|
return __x == 0 ? 0 : ((uint32_t) 1) << (__bw32_inline (__x) - 1);
|
|
}
|
|
|
|
static __always_inline uint16_t
|
|
__bf16_inline (uint16_t __x)
|
|
{
|
|
return __pacify_uint16 (__x == 0
|
|
? 0 : ((uint16_t) 1) << (__bw16_inline (__x) - 1));
|
|
}
|
|
|
|
static __always_inline uint8_t
|
|
__bf8_inline (uint8_t __x)
|
|
{
|
|
return __pacify_uint8 (__x == 0
|
|
? 0 : ((uint8_t) 1) << (__bw8_inline (__x) - 1));
|
|
}
|
|
|
|
# define stdc_bit_floor_uc(x) ((unsigned char) __bf8_inline (x))
|
|
# define stdc_bit_floor_us(x) ((unsigned short) __bf16_inline (x))
|
|
# define stdc_bit_floor_ui(x) ((unsigned int) __bf32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_bit_floor_ul(x) ((unsigned long int) __bf64_inline (x))
|
|
# else
|
|
# define stdc_bit_floor_ul(x) ((unsigned long int) __bf32_inline (x))
|
|
# endif
|
|
# define stdc_bit_floor_ull(x) ((unsigned long long int) __bf64_inline (x))
|
|
#endif
|
|
|
|
/* Bit ceiling. */
|
|
extern unsigned char stdc_bit_ceil_uc (unsigned char __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned short stdc_bit_ceil_us (unsigned short __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned int stdc_bit_ceil_ui (unsigned int __x)
|
|
__THROW __attribute_const__;
|
|
extern unsigned long int stdc_bit_ceil_ul (unsigned long int __x)
|
|
__THROW __attribute_const__;
|
|
__extension__
|
|
extern unsigned long long int stdc_bit_ceil_ull (unsigned long long int __x)
|
|
__THROW __attribute_const__;
|
|
#if __glibc_has_builtin (__builtin_stdc_bit_ceil)
|
|
# define stdc_bit_ceil(x) (__builtin_stdc_bit_ceil (x))
|
|
#else
|
|
# define stdc_bit_ceil(x) ((__typeof (x)) stdc_bit_ceil_ull (x))
|
|
#endif
|
|
|
|
#if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
|
|
static __always_inline uint64_t
|
|
__bc64_inline (uint64_t __x)
|
|
{
|
|
return __x <= 1 ? 1 : ((uint64_t) 2) << (__bw64_inline (__x - 1) - 1);
|
|
}
|
|
|
|
static __always_inline uint32_t
|
|
__bc32_inline (uint32_t __x)
|
|
{
|
|
return __x <= 1 ? 1 : ((uint32_t) 2) << (__bw32_inline (__x - 1) - 1);
|
|
}
|
|
|
|
static __always_inline uint16_t
|
|
__bc16_inline (uint16_t __x)
|
|
{
|
|
return __pacify_uint16 (__x <= 1
|
|
? 1
|
|
: ((uint16_t) 2)
|
|
<< (__bw16_inline ((uint16_t) (__x - 1)) - 1));
|
|
}
|
|
|
|
static __always_inline uint8_t
|
|
__bc8_inline (uint8_t __x)
|
|
{
|
|
return __pacify_uint8 (__x <= 1
|
|
? 1
|
|
: ((uint8_t) 2)
|
|
<< (__bw8_inline ((uint8_t) (__x - 1)) - 1));
|
|
}
|
|
|
|
# define stdc_bit_ceil_uc(x) ((unsigned char) __bc8_inline (x))
|
|
# define stdc_bit_ceil_us(x) ((unsigned short) __bc16_inline (x))
|
|
# define stdc_bit_ceil_ui(x) ((unsigned int) __bc32_inline (x))
|
|
# if __WORDSIZE == 64
|
|
# define stdc_bit_ceil_ul(x) ((unsigned long int) __bc64_inline (x))
|
|
# else
|
|
# define stdc_bit_ceil_ul(x) ((unsigned long int) __bc32_inline (x))
|
|
# endif
|
|
# define stdc_bit_ceil_ull(x) ((unsigned long long int) __bc64_inline (x))
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _STDBIT_H */
|