bits/fp-fast.h

   1 /* Define FP_FAST_* macros.
   2    Copyright (C) 2016-2020 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/fp-fast.h> directly; include <math.h> instead."
  21 #endif
  22
  23 #ifdef __USE_ISOC99
  24
  25 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
  26    builtins are supported.  */
  27 # ifdef __FP_FAST_FMA
  28 #  define FP_FAST_FMA 1
  29 # endif
  30
  31 # ifdef __FP_FAST_FMAF
  32 #  define FP_FAST_FMAF 1
  33 # endif
  34
  35 # ifdef __FP_FAST_FMAL
  36 #  define FP_FAST_FMAL 1
  37 # endif
  38
  39 #endif