bits/mathdef.h

   1 /* Copyright (C) 1997-2013 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 /* Normally, there is no long double type and the `float' and `double'
  26    expressions are evaluated as `double'.  */
  27 typedef double float_t;         /* `float' expressions are evaluated as
  28                                    `double'.  */
  29 typedef double double_t;        /* `double' expressions are evaluated as
  30                                    `double'.  */
  31
  32 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  33 # define FP_ILOGB0      (-2147483647)
  34 # define FP_ILOGBNAN    2147483647
  35
  36 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
  37    builtins are supported.  */
  38 #if __FP_FAST_FMA
  39 # define FP_FAST_FMA 1
  40 #endif
  41
  42 #if __FP_FAST_FMAF
  43 # define FP_FAST_FMAF 1
  44 #endif
  45
  46 #if __FP_FAST_FMAL
  47 # define FP_FAST_FMAL 1
  48 #endif
  49
  50 #endif  /* ISO C99 */
  51
  52 #ifndef __NO_LONG_DOUBLE_MATH
  53 /* Signal that we do not really have a `long double'.  The disables the
  54    declaration of all the `long double' function variants.  */
  55 # define __NO_LONG_DOUBLE_MATH  1
  56 #endif