/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_#define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_/* * Compile time versions of __arch_hweightN() #define __const_hweight8(w) \unsigned int ) \1 ULL << 0 ))) + \1 ULL << 1 ))) + \1 ULL << 2 ))) + \1 ULL << 3 ))) + \1 ULL << 4 ))) + \1 ULL << 5 ))) + \1 ULL << 6 ))) + \1 ULL << 7 )))))#define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 ))#define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16 ))#define __const_hweight64(w) (__const_hweight32(w) + __const_hweight32((w) >> 32 ))/* * Generic interface. #define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w))#define hweight16(w) (__builtin_constant_p(w) ? __const_hweight16(w) : __arch_hweight16(w))#define hweight32(w) (__builtin_constant_p(w) ? __const_hweight32(w) : __arch_hweight32(w))#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w))/* * Interface for known constant arguments #define HWEIGHT8(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight8(w))#define HWEIGHT16(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight16(w))#define HWEIGHT32(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight32(w))#define HWEIGHT64(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight64(w))/* * Type invariant interface to the compile time constant hweight functions. #define HWEIGHT(w) HWEIGHT64((u64)w)#endif /* _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ */
Messung V0.5 in Prozent C=96 H=93 G=94
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(vorverarbeitet am 2026-06-07)
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