Commit | Line | Data |
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52414043 | 1 | /* Copy sign into another 'double' number. |
5e69ceb7 | 2 | Copyright (C) 2011-2014 Free Software Foundation, Inc. |
52414043 MW |
3 | |
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU Lesser General Public License as published by | |
6 | the Free Software Foundation; either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | /* Specification. */ | |
20 | #include <math.h> | |
21 | ||
22 | double | |
23 | copysign (double x, double y) | |
24 | { | |
25 | return (signbit (x) != signbit (y) ? - x : x); | |
26 | } |