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43 lines
1.6 KiB
C
43 lines
1.6 KiB
C
/* Define __GLIBC_FLT_EVAL_METHOD.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_H
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# error "Never use <bits/flt-eval-method.h> directly; include <math.h> instead."
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#endif
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/* __GLIBC_FLT_EVAL_METHOD is the value of FLT_EVAL_METHOD used to
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determine the evaluation method typedefs such as float_t and
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double_t. It must be a value from C11 or TS 18661-3:2015, and not
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-1. */
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/* In the default version of this header, follow __FLT_EVAL_METHOD__.
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-1 is mapped to 2 (considering evaluation as long double to be a
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conservatively safe assumption), and if __FLT_EVAL_METHOD__ is not
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defined then assume there is no excess precision and use the value
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0. */
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#ifdef __FLT_EVAL_METHOD__
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# if __FLT_EVAL_METHOD__ == -1
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# define __GLIBC_FLT_EVAL_METHOD 2
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# else
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# define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__
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# endif
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#else
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# define __GLIBC_FLT_EVAL_METHOD 0
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#endif
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