Warning: That file was not part of the compilation database. It may have many parsing errors.
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
---|---|
2 | #ifndef _ASM_GENERIC_BITOPS___FFS_H_ |
3 | #define _ASM_GENERIC_BITOPS___FFS_H_ |
4 | |
5 | #include <asm/types.h> |
6 | |
7 | /** |
8 | * generic___ffs - find first bit in word. |
9 | * @word: The word to search |
10 | * |
11 | * Undefined if no bit exists, so code should check against 0 first. |
12 | */ |
13 | static __always_inline unsigned long generic___ffs(unsigned long word) |
14 | { |
15 | int num = 0; |
16 | |
17 | #if BITS_PER_LONG == 64 |
18 | if ((word & 0xffffffff) == 0) { |
19 | num += 32; |
20 | word >>= 32; |
21 | } |
22 | #endif |
23 | if ((word & 0xffff) == 0) { |
24 | num += 16; |
25 | word >>= 16; |
26 | } |
27 | if ((word & 0xff) == 0) { |
28 | num += 8; |
29 | word >>= 8; |
30 | } |
31 | if ((word & 0xf) == 0) { |
32 | num += 4; |
33 | word >>= 4; |
34 | } |
35 | if ((word & 0x3) == 0) { |
36 | num += 2; |
37 | word >>= 2; |
38 | } |
39 | if ((word & 0x1) == 0) |
40 | num += 1; |
41 | return num; |
42 | } |
43 | |
44 | #ifndef __HAVE_ARCH___FFS |
45 | #define __ffs(word) generic___ffs(word) |
46 | #endif |
47 | |
48 | #endif /* _ASM_GENERIC_BITOPS___FFS_H_ */ |
49 |
Warning: That file was not part of the compilation database. It may have many parsing errors.