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| 1 | /* Define __GLIBC_FLT_EVAL_METHOD. |
|---|---|
| 2 | Copyright (C) 2016-2022 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 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _MATH_H |
| 20 | # error "Never use <bits/flt-eval-method.h> directly; include <math.h> instead." |
| 21 | #endif |
| 22 | |
| 23 | /* __GLIBC_FLT_EVAL_METHOD is the value of FLT_EVAL_METHOD used to |
| 24 | determine the evaluation method typedefs such as float_t and |
| 25 | double_t. It must be a value from C11 or TS 18661-3:2015, and not |
| 26 | -1. */ |
| 27 | |
| 28 | /* In the default version of this header, follow __FLT_EVAL_METHOD__. |
| 29 | -1 is mapped to 2 (considering evaluation as long double to be a |
| 30 | conservatively safe assumption), and if __FLT_EVAL_METHOD__ is not |
| 31 | defined then assume there is no excess precision and use the value |
| 32 | 0. */ |
| 33 | |
| 34 | #ifdef __FLT_EVAL_METHOD__ |
| 35 | # if __FLT_EVAL_METHOD__ == -1 |
| 36 | # define __GLIBC_FLT_EVAL_METHOD 2 |
| 37 | # else |
| 38 | # define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__ |
| 39 | # endif |
| 40 | #else |
| 41 | # define __GLIBC_FLT_EVAL_METHOD 0 |
| 42 | #endif |
| 43 |
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