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1/* Define __GLIBC_FLT_EVAL_METHOD.
2 Copyright (C) 2016-2019 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/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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