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| author | Alexander van Heukelum <heukelum@mailshack.com> | 2008-03-15 18:31:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-26 19:21:16 +0200 |
| commit | 56a6b1eb7bfb5ace0b5cb9c149f502fbd101b8ab (patch) | |
| tree | 46d3781050938b0649fc89cd8e7f612cacb66984 /include/asm-powerpc | |
| parent | 7d9dff22e8ad06ad330968c9e3d3a2fb55a5f9c3 (diff) | |
| download | linux-56a6b1eb7bfb5ace0b5cb9c149f502fbd101b8ab.tar.bz2 | |
generic: implement __fls on all 64-bit archs
Implement __fls on all 64-bit archs:
alpha has an implementation of fls64.
Added __fls(x) = fls64(x) - 1.
ia64 has fls, but not __fls.
Added __fls based on code of fls.
mips and powerpc have __ilog2, which is the same as __fls.
Added __fls = __ilog2.
parisc, s390, sh and sparc64:
Include generic __fls.
x86_64 already has __fls.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/bitops.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h index a99a74929475..897eade3afbe 100644 --- a/include/asm-powerpc/bitops.h +++ b/include/asm-powerpc/bitops.h @@ -313,6 +313,11 @@ static __inline__ int fls(unsigned int x) return 32 - lz; } +static __inline__ unsigned long __fls(unsigned long x) +{ + return __ilog2(x); +} + /* * 64-bit can do this using one cntlzd (count leading zeroes doubleword) * instruction; for 32-bit we use the generic version, which does two |