Staging
v0.5.1
https://github.com/torvalds/linux
Raw File
Tip revision: a937536b868b8369b98967929045f1df54234323 authored by Linus Torvalds on 17 March 2013, 22:59:32 UTC
Linux 3.9-rc3
Tip revision: a937536
builtin-__fls.h
#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_
#define _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_

/**
 * __fls - find last (most-significant) set bit in a long word
 * @word: the word to search
 *
 * Undefined if no set bit exists, so code should check against 0 first.
 */
static __always_inline unsigned long __fls(unsigned long word)
{
	return (sizeof(word) * 8) - 1 - __builtin_clzl(word);
}

#endif
back to top