| David Daney | 1a403d1 | 2010-06-25 16:46:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | */ |
| 7 | #ifndef _ASM_ARCH_HWEIGHT_H |
| 8 | #define _ASM_ARCH_HWEIGHT_H |
| 9 | |
| 10 | #ifdef ARCH_HAS_USABLE_BUILTIN_POPCOUNT |
| 11 | |
| 12 | #include <asm/types.h> |
| 13 | |
| 14 | static inline unsigned int __arch_hweight32(unsigned int w) |
| 15 | { |
| 16 | return __builtin_popcount(w); |
| 17 | } |
| 18 | |
| 19 | static inline unsigned int __arch_hweight16(unsigned int w) |
| 20 | { |
| 21 | return __builtin_popcount(w & 0xffff); |
| 22 | } |
| 23 | |
| 24 | static inline unsigned int __arch_hweight8(unsigned int w) |
| 25 | { |
| 26 | return __builtin_popcount(w & 0xff); |
| 27 | } |
| 28 | |
| 29 | static inline unsigned long __arch_hweight64(__u64 w) |
| 30 | { |
| 31 | return __builtin_popcountll(w); |
| 32 | } |
| 33 | |
| 34 | #else |
| 35 | #include <asm-generic/bitops/arch_hweight.h> |
| 36 | #endif |
| 37 | |
| 38 | #endif /* _ASM_ARCH_HWEIGHT_H */ |