[mirror_ubuntu-bionic-kernel.git] / include / asm-generic / bitops / 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
Commit	Line	Data
048fa2df CM	1	#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_
	2	#define _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_
	3
	4	/**
	5	* __fls - find last (most-significant) set bit in a long word
	6	* @word: the word to search
	7	*
	8	* Undefined if no set bit exists, so code should check against 0 first.
	9	*/
	10	static __always_inline unsigned long __fls(unsigned long word)
	11	{
	12	return (sizeof(word) * 8) - 1 - __builtin_clzl(word);
	13	}
	14
	15	#endif