bits/mathdef.h

   1 /* Copyright (C) 1997-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #if !defined _MATH_H && !defined _COMPLEX_H
  19 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  20 #endif
  21
  22 #if defined  __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
  23 # define _MATH_H_MATHDEF        1
  24
  25 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  26 # define FP_ILOGB0      (-2147483647)
  27 # define FP_ILOGBNAN    2147483647
  28
  29 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
  30    builtins are supported.  */
  31 #ifdef __FP_FAST_FMA
  32 # define FP_FAST_FMA 1
  33 #endif
  34
  35 #ifdef __FP_FAST_FMAF
  36 # define FP_FAST_FMAF 1
  37 #endif
  38
  39 #ifdef __FP_FAST_FMAL
  40 # define FP_FAST_FMAL 1
  41 #endif
  42
  43 #endif  /* ISO C99 */
  44
  45 #ifndef __NO_LONG_DOUBLE_MATH
  46 /* Signal that we do not really have a `long double'.  The disables the
  47    declaration of all the `long double' function variants.  */
  48 # define __NO_LONG_DOUBLE_MATH  1
  49 #endif