1 | /* Copyright (C) 2000-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library. If not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | /* Finds the first bit set in an integer. */ |
19 | |
20 | #include <sysdep.h> |
21 | |
22 | .arch ev6 |
23 | .set noreorder |
24 | .set noat |
25 | |
26 | |
27 | ENTRY(__ffs) |
28 | #ifdef PROF |
29 | ldgp gp, 0(pv) |
30 | lda AT, _mcount |
31 | jsr AT, (AT), _mcount |
32 | .prologue 1 |
33 | #else |
34 | .prologue 0 |
35 | #endif |
36 | |
37 | zap $16, 0xF0, $16 |
38 | cttz $16, $0 |
39 | addq $0, 1, $0 |
40 | cmoveq $16, 0, $0 |
41 | |
42 | nop |
43 | nop |
44 | nop |
45 | ret |
46 | |
47 | END(__ffs) |
48 | |
49 | weak_alias (__ffs, ffs) |
50 | libc_hidden_def (__ffs) |
51 | libc_hidden_builtin_def (ffs) |
52 | |