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3ef6b850 | 1 | /* Wrapper for __scalbln handles setting errno. |
2b778ceb | 2 | Copyright (C) 2014-2021 Free Software Foundation, Inc. |
3ef6b850 SL |
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/>. */ |
3ef6b850 SL |
18 | |
19 | #include <errno.h> | |
20 | #include <math.h> | |
3ef6b850 | 21 | |
e4d6a835 GG |
22 | FLOAT |
23 | M_DECL_FUNC (__w_scalbln) (FLOAT x, long int n) | |
3ef6b850 | 24 | { |
e4d6a835 | 25 | if (!isfinite (x) || x == 0) |
9946e7a9 | 26 | return x + x; |
3ef6b850 | 27 | |
e4d6a835 | 28 | x = M_SUF (__scalbln) (x, n); |
3ef6b850 | 29 | |
e4d6a835 | 30 | if (!isfinite (x) || x == 0) |
3ef6b850 SL |
31 | __set_errno (ERANGE); |
32 | ||
33 | return x; | |
34 | } | |
3ef6b850 | 35 | |
e4d6a835 | 36 | declare_mgen_alias (__w_scalbln, scalbln) |