diff options
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/bitops.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/include/asm-i386/bitops.h b/include/asm-i386/bitops.h index 26eb9811712..65679aca4b2 100644 --- a/include/asm-i386/bitops.h +++ b/include/asm-i386/bitops.h @@ -367,11 +367,6 @@ static inline unsigned long ffz(unsigned long word) return word; } -/* - * fls: find last bit set. - */ - -#define fls(x) generic_fls(x) #define fls64(x) generic_fls64(x) #ifdef __KERNEL__ @@ -415,6 +410,23 @@ static inline int ffs(int x) } /** + * fls - find last bit set + * @x: the word to search + * + * This is defined the same way as ffs. + */ +static inline int fls(int x) +{ + int r; + + __asm__("bsrl %1,%0\n\t" + "jnz 1f\n\t" + "movl $-1,%0\n" + "1:" : "=r" (r) : "rm" (x)); + return r+1; +} + +/** * hweightN - returns the hamming weight of a N-bit word * @x: the word to weigh * |