| 1 | /* Copyright (C) 2000-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library. If not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | /* Finds the first bit set in an integer. */ |
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| 19 | |
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| 20 | #include <sysdep.h> |
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| 21 | |
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| 22 | .arch ev6 |
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| 23 | .set noreorder |
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| 24 | .set noat |
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| 25 | |
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| 26 | |
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| 27 | ENTRY(__ffs) |
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| 28 | #ifdef PROF |
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| 29 | ldgp gp, 0(pv) |
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| 30 | lda AT, _mcount |
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| 31 | jsr AT, (AT), _mcount |
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| 32 | .prologue 1 |
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| 33 | #else |
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| 34 | .prologue 0 |
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| 35 | #endif |
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| 36 | |
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| 37 | zap $16, 0xF0, $16 |
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| 38 | cttz $16, $0 |
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| 39 | addq $0, 1, $0 |
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| 40 | cmoveq $16, 0, $0 |
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| 41 | |
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| 42 | nop |
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| 43 | nop |
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| 44 | nop |
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| 45 | ret |
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| 46 | |
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| 47 | END(__ffs) |
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| 48 | |
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| 49 | weak_alias (__ffs, ffs) |
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| 50 | libc_hidden_def (__ffs) |
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| 51 | libc_hidden_builtin_def (ffs) |
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| 52 | |
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