/* 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)			\	 ((!!((w) & (1ULL << 0))) +	\	  (!!((w) & (1ULL << 1))) +	\	  (!!((w) & (1ULL << 2))) +	\	  (!!((w) & (1ULL << 3))) +	\	  (!!((w) & (1ULL << 4))) +	\	  (!!((w) & (1ULL << 5))) +	\	  (!!((w) & (1ULL << 6))) +	\	  (!!((w) & (1ULL << 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_ */