diff options
Diffstat (limited to 'include/asm-powerpc/bitops.h')
| -rw-r--r-- | include/asm-powerpc/bitops.h | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h index 220d9a781ab9..a99a74929475 100644 --- a/include/asm-powerpc/bitops.h +++ b/include/asm-powerpc/bitops.h @@ -312,24 +312,26 @@ static __inline__ int fls(unsigned int x) asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x)); return 32 - lz; } + +/* + * 64-bit can do this using one cntlzd (count leading zeroes doubleword) + * instruction; for 32-bit we use the generic version, which does two + * 32-bit fls calls. + */ +#ifdef __powerpc64__ +static __inline__ int fls64(__u64 x) +{ + int lz; + + asm ("cntlzd %0,%1" : "=r" (lz) : "r" (x)); + return 64 - lz; +} +#else #include <asm-generic/bitops/fls64.h> +#endif /* __powerpc64__ */ #include <asm-generic/bitops/hweight.h> - -#define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) -unsigned long find_next_zero_bit(const unsigned long *addr, - unsigned long size, unsigned long offset); -/** - * find_first_bit - find the first set bit in a memory region - * @addr: The address to start the search at - * @size: The maximum size to search - * - * Returns the bit-number of the first set bit, not the number of the byte - * containing a bit. - */ -#define find_first_bit(addr, size) find_next_bit((addr), (size), 0) -unsigned long find_next_bit(const unsigned long *addr, - unsigned long size, unsigned long offset); +#include <asm-generic/bitops/find.h> /* Little-endian versions */ |