projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5da3d377 UD |
1 | /* Find first set bit in a word, counted from least significant end. |
| 2 | For PowerPC. | |
| 04277e02 | 3 | Copyright (C) 1991-2019 Free Software Foundation, Inc. |
| 5da3d377 UD |
4 | This file is part of the GNU C Library. |
| 5 | Contributed by Torbjorn Granlund (tege@sics.se). | |
| 6 | ||
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 8 | modify it under the terms of the GNU Lesser General Public | |
| 9 | License as published by the Free Software Foundation; either | |
| 10 | version 2.1 of the License, or (at your option) any later version. | |
| 11 | ||
| 12 | The GNU C Library is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | Lesser General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 | 18 | License along with the GNU C Library; if not, see |
| 5a82c748 | 19 | <https://www.gnu.org/licenses/>. */ |
| 5da3d377 UD |
20 | |
| 21 | #define ffsl __something_else | |
| 22 | #include <limits.h> | |
| 23 | #include <string.h> | |
| 24 | ||
| 25 | #undef ffs | |
| 26 | ||
| 27 | int | |
| 28 | __ffsll (long long int x) | |
| 29 | { | |
| 30 | int cnt; | |
| 31 | ||
| 32 | asm ("cntlzd %0,%1" : "=r" (cnt) : "r" (x & -x)); | |
| 33 | return 64 - cnt; | |
| 34 | } | |
| 35 | weak_alias (__ffsll, ffsll) | |
| 36 | #undef ffsl | |
| 37 | weak_alias (__ffsll, ffsl) |