18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ 38c2ecf20Sopenharmony_ci#define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* 68c2ecf20Sopenharmony_ci * Compile time versions of __arch_hweightN() 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci#define __const_hweight8(w) \ 98c2ecf20Sopenharmony_ci ((unsigned int) \ 108c2ecf20Sopenharmony_ci ((!!((w) & (1ULL << 0))) + \ 118c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 1))) + \ 128c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 2))) + \ 138c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 3))) + \ 148c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 4))) + \ 158c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 5))) + \ 168c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 6))) + \ 178c2ecf20Sopenharmony_ci (!!((w) & (1ULL << 7))))) 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci#define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 )) 208c2ecf20Sopenharmony_ci#define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16)) 218c2ecf20Sopenharmony_ci#define __const_hweight64(w) (__const_hweight32(w) + __const_hweight32((w) >> 32)) 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci/* 248c2ecf20Sopenharmony_ci * Generic interface. 258c2ecf20Sopenharmony_ci */ 268c2ecf20Sopenharmony_ci#define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w)) 278c2ecf20Sopenharmony_ci#define hweight16(w) (__builtin_constant_p(w) ? __const_hweight16(w) : __arch_hweight16(w)) 288c2ecf20Sopenharmony_ci#define hweight32(w) (__builtin_constant_p(w) ? __const_hweight32(w) : __arch_hweight32(w)) 298c2ecf20Sopenharmony_ci#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w)) 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci/* 328c2ecf20Sopenharmony_ci * Interface for known constant arguments 338c2ecf20Sopenharmony_ci */ 348c2ecf20Sopenharmony_ci#define HWEIGHT8(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight8(w)) 358c2ecf20Sopenharmony_ci#define HWEIGHT16(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight16(w)) 368c2ecf20Sopenharmony_ci#define HWEIGHT32(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight32(w)) 378c2ecf20Sopenharmony_ci#define HWEIGHT64(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight64(w)) 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_ci/* 408c2ecf20Sopenharmony_ci * Type invariant interface to the compile time constant hweight functions. 418c2ecf20Sopenharmony_ci */ 428c2ecf20Sopenharmony_ci#define HWEIGHT(w) HWEIGHT64((u64)w) 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci#endif /* _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ */ 45