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___FLS_H_ |
3 | #define _ASM_GENERIC_BITOPS___FLS_H_ |
4 | |
5 | #include <asm/types.h> |
6 | |
7 | /** |
8 | * generic___fls - find last (most-significant) set bit in a long word |
9 | * @word: the word to search |
10 | * |
11 | * Undefined if no set bit exists, so code should check against 0 first. |
12 | */ |
13 | static __always_inline unsigned long generic___fls(unsigned long word) |
14 | { |
15 | int num = BITS_PER_LONG - 1; |
16 | |
17 | #if BITS_PER_LONG == 64 |
18 | if (!(word & (~0ul << 32))) { |
19 | num -= 32; |
20 | word <<= 32; |
21 | } |
22 | #endif |
23 | if (!(word & (~0ul << (BITS_PER_LONG-16)))) { |
24 | num -= 16; |
25 | word <<= 16; |
26 | } |
27 | if (!(word & (~0ul << (BITS_PER_LONG-8)))) { |
28 | num -= 8; |
29 | word <<= 8; |
30 | } |
31 | if (!(word & (~0ul << (BITS_PER_LONG-4)))) { |
32 | num -= 4; |
33 | word <<= 4; |
34 | } |
35 | if (!(word & (~0ul << (BITS_PER_LONG-2)))) { |
36 | num -= 2; |
37 | word <<= 2; |
38 | } |
39 | if (!(word & (~0ul << (BITS_PER_LONG-1)))) |
40 | num -= 1; |
41 | return num; |
42 | } |
43 | |
44 | #ifndef __HAVE_ARCH___FLS |
45 | #define __fls(word) generic___fls(word) |
46 | #endif |
47 | |
48 | #endif /* _ASM_GENERIC_BITOPS___FLS_H_ */ |
49 |
Warning: That file was not part of the compilation database. It may have many parsing errors.