[mirror_ubuntu-bionic-kernel.git] / include / asm-generic / bitops / builtin-fls.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_
#define _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_

/**
 * fls - find last (most-significant) bit set
 * @x: the word to search
 *
 * This is defined the same way as ffs.
 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
 */
static __always_inline int fls(int x)
{
	return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
}

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
048fa2df CM	2	#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_
	3	#define _ASM_GENERIC_BITOPS_BUILTIN_FLS_H_
	4
	5	/**
	6	* fls - find last (most-significant) bit set
	7	* @x: the word to search
	8	*
	9	* This is defined the same way as ffs.
	10	* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
	11	*/
	12	static __always_inline int fls(int x)
	13	{
	14	return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
	15	}
	16
	17	#endif