xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Default `INFINITY' constant. |
| 2 | Copyright (C) 2004-2016 Free Software Foundation, Inc. |
| 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 |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _MATH_H |
| 20 | # error "Never use <bits/inf.h> directly; include <math.h> instead." |
| 21 | #endif |
| 22 | |
| 23 | /* If we don't have real infinity, then we're supposed to produce a float |
| 24 | value that overflows at translation time, which is required to produce |
| 25 | a diagnostic. GCC's __builtin_inff produces a quite nice diagnostic |
| 26 | that tells the user that the target doesn't support infinities. */ |
| 27 | |
| 28 | #if __GNUC_PREREQ(3,3) |
| 29 | # define INFINITY (__builtin_inff()) |
| 30 | #else |
| 31 | # define INFINITY (1e9999f) |
| 32 | #endif |