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 */ 39