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| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-02-01 15:03:07 +0100 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@zytor.com> | 2010-04-06 15:52:11 -0700 |
| commit | 1527bc8b928dd1399c3d3467dd47d9ede210978a (patch) | |
| tree | fb391da915bdae9f933b8170ff61aa43c85ef9ae /include/asm-generic/bitops/hweight.h | |
| parent | Merge branch 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 (diff) | |
| download | linux-dev-1527bc8b928dd1399c3d3467dd47d9ede210978a.tar.xz linux-dev-1527bc8b928dd1399c3d3467dd47d9ede210978a.zip | |
bitops: Optimize hweight() by making use of compile-time evaluation
Rename the extisting runtime hweight() implementations to
__arch_hweight(), rename the compile-time versions to __const_hweight()
and then have hweight() pick between them.
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100318111929.GB11152@aftab>
Acked-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <1265028224.24455.154.camel@laptop>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'include/asm-generic/bitops/hweight.h')
| -rw-r--r-- | include/asm-generic/bitops/hweight.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/include/asm-generic/bitops/hweight.h b/include/asm-generic/bitops/hweight.h index fbbc383771da..a94d6519c7ed 100644 --- a/include/asm-generic/bitops/hweight.h +++ b/include/asm-generic/bitops/hweight.h @@ -1,11 +1,7 @@ #ifndef _ASM_GENERIC_BITOPS_HWEIGHT_H_ #define _ASM_GENERIC_BITOPS_HWEIGHT_H_ -#include <asm/types.h> - -extern unsigned int hweight32(unsigned int w); -extern unsigned int hweight16(unsigned int w); -extern unsigned int hweight8(unsigned int w); -extern unsigned long hweight64(__u64 w); +#include <asm-generic/bitops/arch_hweight.h> +#include <asm-generic/bitops/const_hweight.h> #endif /* _ASM_GENERIC_BITOPS_HWEIGHT_H_ */ |