| 1 | /* Find first set bit in a word, counted from least significant end. |
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| 2 | For PowerPC. |
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| 3 | Copyright (C) 1991-2024 Free Software Foundation, Inc. |
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| 4 | This file is part of the GNU C Library. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, see |
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| 18 | <https://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #define ffsl __something_else |
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| 21 | #include <limits.h> |
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| 22 | #include <string.h> |
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| 23 | |
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| 24 | #undef ffs |
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| 25 | |
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| 26 | int |
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| 27 | __ffsll (long long int x) |
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| 28 | { |
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| 29 | int cnt; |
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| 30 | |
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| 31 | asm ("cntlzd %0,%1" : "=r" (cnt) : "r" (x & -x)); |
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| 32 | return 64 - cnt; |
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| 33 | } |
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| 34 | weak_alias (__ffsll, ffsll) |
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| 35 | #undef ffsl |
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| 36 | weak_alias (__ffsll, ffsl) |
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| 37 | |
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