sysdeps/sh/sh4/bits/mathdef.h

   1 /* Copyright (C) 1997, 1998, 1999, 2000, 2004 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #if !defined _MATH_H && !defined _COMPLEX_H
  20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  21 #endif
  22
  23
  24 /* FIXME! This file describes properties of the compiler, not the machine;
  25    it should not be part of libc!
  26
  27    FIXME! This file does not deal with the -fshort-double option of
  28    gcc! */
  29
  30 #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
  31 # define _MATH_H_MATHDEF        1
  32
  33 # ifdef __GNUC__
  34 #  if __STDC__ == 1
  35
  36 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
  37 typedef float float_t;          /* `float' expressions are evaluated as
  38                                    `float'.  */
  39 typedef double double_t;        /* `double' expressions are evaluated as
  40                                    `double'.  */
  41
  42 #  else
  43
  44 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
  45 typedef double float_t;         /* `float' expressions are evaluated as
  46                                    `double'.  */
  47 typedef double double_t;        /* `double' expressions are evaluated as
  48                                    `double'.  */
  49
  50 #  endif
  51 # else
  52
  53 /* Wild guess at types for float_t and double_t. */
  54 typedef double float_t;
  55 typedef double double_t;
  56
  57 # endif
  58
  59 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  60 # define FP_ILOGB0      0x80000001
  61 # define FP_ILOGBNAN    0x7fffffff
  62
  63 #endif  /* ISO C99 */
  64
  65 #ifndef __NO_LONG_DOUBLE_MATH
  66 /* Signal that we do not really have a `long double'.  The disables the
  67    declaration of all the `long double' function variants.  */
  68 # define __NO_LONG_DOUBLE_MATH  1
  69 #endif