diff options
| author | David S. Miller <davem@davemloft.net> | 2011-07-29 09:42:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-08-02 21:28:50 -0700 |
| commit | ef7c4d4675d2a9206f913f26ca1a5cd41bff9d41 (patch) | |
| tree | 88839b80e603ba395882df98b8a8c8f8385337b1 /arch/sparc/include | |
| parent | e95ade083939dcb4b0c51c1a2c8504ea9ef3d6ef (diff) | |
sparc: Use popc if possible for hweight routines.
Just like powerpc, we code patch at boot time.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/bitops_64.h | 42 |
1 files changed, 4 insertions, 38 deletions
diff --git a/arch/sparc/include/asm/bitops_64.h b/arch/sparc/include/asm/bitops_64.h index 325e295d60de..3588807baa6e 100644 --- a/arch/sparc/include/asm/bitops_64.h +++ b/arch/sparc/include/asm/bitops_64.h @@ -42,45 +42,11 @@ extern void change_bit(unsigned long nr, volatile unsigned long *addr); * of bits set) of a N-bit word */ -#ifdef ULTRA_HAS_POPULATION_COUNT +extern unsigned long __arch_hweight64(__u64 w); +extern unsigned int __arch_hweight32(unsigned int w); +extern unsigned int __arch_hweight16(unsigned int w); +extern unsigned int __arch_hweight8(unsigned int w); -static inline unsigned int __arch_hweight64(unsigned long w) -{ - unsigned int res; - - __asm__ ("popc %1,%0" : "=r" (res) : "r" (w)); - return res; -} - -static inline unsigned int __arch_hweight32(unsigned int w) -{ - unsigned int res; - - __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffffffff)); - return res; -} - -static inline unsigned int __arch_hweight16(unsigned int w) -{ - unsigned int res; - - __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xffff)); - return res; -} - -static inline unsigned int __arch_hweight8(unsigned int w) -{ - unsigned int res; - - __asm__ ("popc %1,%0" : "=r" (res) : "r" (w & 0xff)); - return res; -} - -#else - -#include <asm-generic/bitops/arch_hweight.h> - -#endif #include <asm-generic/bitops/const_hweight.h> #include <asm-generic/bitops/lock.h> #endif /* __KERNEL__ */ |