From 2dfc383ad587bbead84739a9ff9273df3eda983d Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Sun, 26 Mar 2006 01:39:10 -0800 Subject: [PATCH] bitops: generic fls64() This patch introduces the C-language equivalent of the function: int fls64(__u64 x); In include/asm-generic/bitops/fls64.h This code largely copied from: include/linux/bitops.h Signed-off-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/bitops/fls64.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 include/asm-generic/bitops/fls64.h (limited to 'include/asm-generic/bitops') diff --git a/include/asm-generic/bitops/fls64.h b/include/asm-generic/bitops/fls64.h new file mode 100644 index 00000000000..716c51e0dd4 --- /dev/null +++ b/include/asm-generic/bitops/fls64.h @@ -0,0 +1,12 @@ +#ifndef _ASM_GENERIC_BITOPS_FLS64_H_ +#define _ASM_GENERIC_BITOPS_FLS64_H_ + +static inline int fls64(__u64 x) +{ + __u32 h = x >> 32; + if (h) + return fls(h) + 32; + return fls(x); +} + +#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */ -- cgit v1.2.3