162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ 362306a36Sopenharmony_ci#define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* 662306a36Sopenharmony_ci * Compile time versions of __arch_hweightN() 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci#define __const_hweight8(w) \ 962306a36Sopenharmony_ci ((unsigned int) \ 1062306a36Sopenharmony_ci ((!!((w) & (1ULL << 0))) + \ 1162306a36Sopenharmony_ci (!!((w) & (1ULL << 1))) + \ 1262306a36Sopenharmony_ci (!!((w) & (1ULL << 2))) + \ 1362306a36Sopenharmony_ci (!!((w) & (1ULL << 3))) + \ 1462306a36Sopenharmony_ci (!!((w) & (1ULL << 4))) + \ 1562306a36Sopenharmony_ci (!!((w) & (1ULL << 5))) + \ 1662306a36Sopenharmony_ci (!!((w) & (1ULL << 6))) + \ 1762306a36Sopenharmony_ci (!!((w) & (1ULL << 7))))) 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci#define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 )) 2062306a36Sopenharmony_ci#define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16)) 2162306a36Sopenharmony_ci#define __const_hweight64(w) (__const_hweight32(w) + __const_hweight32((w) >> 32)) 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci/* 2462306a36Sopenharmony_ci * Generic interface. 2562306a36Sopenharmony_ci */ 2662306a36Sopenharmony_ci#define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w)) 2762306a36Sopenharmony_ci#define hweight16(w) (__builtin_constant_p(w) ? __const_hweight16(w) : __arch_hweight16(w)) 2862306a36Sopenharmony_ci#define hweight32(w) (__builtin_constant_p(w) ? __const_hweight32(w) : __arch_hweight32(w)) 2962306a36Sopenharmony_ci#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w)) 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci/* 3262306a36Sopenharmony_ci * Interface for known constant arguments 3362306a36Sopenharmony_ci */ 3462306a36Sopenharmony_ci#define HWEIGHT8(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight8(w)) 3562306a36Sopenharmony_ci#define HWEIGHT16(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight16(w)) 3662306a36Sopenharmony_ci#define HWEIGHT32(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight32(w)) 3762306a36Sopenharmony_ci#define HWEIGHT64(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight64(w)) 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci/* 4062306a36Sopenharmony_ci * Type invariant interface to the compile time constant hweight functions. 4162306a36Sopenharmony_ci */ 4262306a36Sopenharmony_ci#define HWEIGHT(w) HWEIGHT64((u64)w) 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci#endif /* _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ */ 45