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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_FLS_H_
#define _ASM_GENERIC_BITOPS_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)
{
	int r = 32;

	if (!x)
		return 0;
	if (!(x & 0xffff0000u)) {
		x <<= 16;
		r -= 16;
	}
	if (!(x & 0xff000000u)) {
		x <<= 8;
		r -= 8;
	}
	if (!(x & 0xf0000000u)) {
		x <<= 4;
		r -= 4;
	}
	if (!(x & 0xc0000000u)) {
		x <<= 2;
		r -= 2;
	}
	if (!(x & 0x80000000u)) {
		x <<= 1;
		r -= 1;
	}
	return r;
}

#endif /* _ASM_GENERIC_BITOPS_FLS_H_ */

Filemanager

Name Type Size Permission Actions
__ffs.h File 777 B 0644
__fls.h File 920 B 0644
arch_hweight.h File 555 B 0644
atomic.h File 5.5 KB 0644
builtin-__ffs.h File 379 B 0644
builtin-__fls.h File 436 B 0644
builtin-ffs.h File 410 B 0644
builtin-fls.h File 403 B 0644
const_hweight.h File 1.67 KB 0644
ext2-atomic-setbit.h File 403 B 0644
ext2-atomic.h File 600 B 0644
ffs.h File 654 B 0644
ffz.h File 325 B 0644
find.h File 1.94 KB 0644
fls.h File 674 B 0644
fls64.h File 860 B 0644
hweight.h File 254 B 0644
le.h File 2.19 KB 0644
lock.h File 1.23 KB 0644
non-atomic.h File 3 KB 0644
sched.h File 760 B 0644