#ifndef _LINUX_BITOPS_H #define _LINUX_BITOPS_H #include <asm/types.h> /* * Include this here because some architectures need generic_ffs/fls in * scope */ #include <asm/bitops.h> static __inline__ int get_bitmask_order(unsigned int count) { int order; order = fls(count); return order; /* We could be slightly more clever with -1 here... */ } static __inline__ int get_count_order(unsigned int count) { int order; order = fls(count) - 1; if (count & (count - 1)) order++; return order; } static inline unsigned long hweight_long(unsigned long w) { return sizeof(w) == 4 ? hweight32(w) : hweight64(w); } /** * rol32 - rotate a 32-bit value left * @word: value to rotate * @shift: bits to roll */ static inline __u32 rol32(__u32 word, unsigned int shift) { return (word << shift) | (word >> (32 - shift)); } /** * ror32 - rotate a 32-bit value right * @word: value to rotate * @shift: bits to roll */ static inline __u32 ror32(__u32 word, unsigned int shift) { return (word >> shift) | (word << (32 - shift)); } static inline unsigned fls_long(unsigned long l) { if (sizeof(l) == 4) return fls(l); return fls64(l); } #endif