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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_BITOPS_FFS_H_
#define _ASM_GENERIC_BITOPS_FFS_H_
/**
* generic_ffs - find first bit set
* @x: the word to search
*
* This is defined the same way as
* the libc and compiler builtin ffs routines, therefore
* differs in spirit from ffz (man ffs).
*/
static inline int generic_ffs(int x)
{
int r = 1;
if (!x)
return 0;
if (!(x & 0xffff)) {
x >>= 16;
r += 16;
}
if (!(x & 0xff)) {
x >>= 8;
r += 8;
}
if (!(x & 0xf)) {
x >>= 4;
r += 4;
}
if (!(x & 3)) {
x >>= 2;
r += 2;
}
if (!(x & 1)) {
x >>= 1;
r += 1;
}
return r;
}
#ifndef __HAVE_ARCH_FFS
#define ffs(x) generic_ffs(x)
#endif
#endif /* _ASM_GENERIC_BITOPS_FFS_H_ */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __ffs.h | File | 875 B | 0644 |
|
| __fls.h | File | 1018 B | 0644 |
|
| arch_hweight.h | File | 555 B | 0644 |
|
| atomic.h | File | 1.63 KB | 0644 |
|
| builtin-__ffs.h | File | 378 B | 0644 |
|
| builtin-__fls.h | File | 435 B | 0644 |
|
| builtin-ffs.h | File | 364 B | 0644 |
|
| builtin-fls.h | File | 412 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 | 722 B | 0644 |
|
| ffz.h | File | 325 B | 0644 |
|
| fls.h | File | 761 B | 0644 |
|
| fls64.h | File | 860 B | 0644 |
|
| generic-non-atomic.h | File | 5.19 KB | 0644 |
|
| hweight.h | File | 254 B | 0644 |
|
| instrumented-atomic.h | File | 2.99 KB | 0644 |
|
| instrumented-lock.h | File | 2.64 KB | 0644 |
|
| instrumented-non-atomic.h | File | 4.75 KB | 0644 |
|
| le.h | File | 1.3 KB | 0644 |
|
| lock.h | File | 2.08 KB | 0644 |
|
| non-atomic.h | File | 701 B | 0644 |
|
| non-instrumented-non-atomic.h | File | 588 B | 0644 |
|
| sched.h | File | 760 B | 0644 |
|