projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5695fc84 | 1 | /* ffs -- find first set bit in an int, from least significant end. |
| 04277e02 | 2 | Copyright (C) 2013-2019 Free Software Foundation, Inc. |
| 5695fc84 RH |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library. If not, see | |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 5695fc84 RH |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | ||
| 21 | .syntax unified | |
| 22 | .text | |
| 23 | ||
| 24 | ENTRY (__ffs) | |
| 25 | cmp r0, #0 | |
| 26 | rbit r0, r0 | |
| 27 | itt ne | |
| 28 | clzne r0, r0 | |
| 29 | addne r0, r0, #1 | |
| 30 | bx lr | |
| 31 | END (__ffs) | |
| 32 | ||
| 33 | weak_alias (__ffs, ffs) | |
| 34 | weak_alias (__ffs, ffsl) | |
| 5bb43a43 | 35 | libc_hidden_def (__ffs) |
| 5695fc84 | 36 | libc_hidden_builtin_def (ffs) |