1  /* Define __GLIBC_FLT_EVAL_METHOD.
       2     Copyright (C) 2016-2023 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     If __FLT_EVAL_METHOD__ is not defined or set to -1, assume there is no
      30     excess precision and use the value 0 (this is correct for most targets). */
      31  
      32  #ifdef __FLT_EVAL_METHOD__
      33  # if __FLT_EVAL_METHOD__ == -1
      34  #  define __GLIBC_FLT_EVAL_METHOD	0
      35  # else
      36  #  define __GLIBC_FLT_EVAL_METHOD	__FLT_EVAL_METHOD__
      37  # endif
      38  #else
      39  # define __GLIBC_FLT_EVAL_METHOD	0
      40  #endif