sysdeps/alpha/fpu/bits/mathdef.h

   1 /* Copyright (C) 1997 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _MATH_H
  20 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  21 #endif
  22
  23 /* FIXME! This file describes properties of the compiler, not the machine;
  24    it should not be part of libc!  */
  25
  26 #ifdef __GNUC__
  27 # if __STDC__ == 1
  28
  29 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
  30 typedef float float_t;
  31 typedef double double_t;
  32
  33 /* Signal that types stay as they were declared.  */
  34 #  define FLT_EVAL_METHOD       0
  35
  36 /* Define `INFINITY' as value of type `float'.  */
  37 #  define INFINITY      HUGE_VALF
  38
  39 # else
  40
  41 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
  42 typedef double float_t;
  43 typedef double double_t;
  44
  45 /* Signal that both types are `double'.  */
  46 #  define FLT_EVAL_METHOD       1
  47
  48 /* Define `INFINITY' as value of type `float'.  */
  49 #  define INFINITY      HUGE_VALF
  50
  51 # endif
  52 #else
  53
  54 /* Wild guess at types for float_t and double_t. */
  55 typedef double float_t;
  56 typedef double double_t;
  57
  58 /* Strange compiler, we don't know how it works.  */
  59 # define FLT_EVAL_METHOD        -1
  60
  61 /* Define `INFINITY' as value of type `float'.  */
  62 # define INFINITY       HUGE_VALF
  63
  64 #endif
  65
  66 /* Number of decimal digits for the `double' type.  */
  67 #define DECIMAL_DIG     15