sysdeps/powerpc/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
  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 #ifdef __GNUC__
  31 #if __STDC__ == 1
  32
  33 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
  34 typedef float float_t;          /* `float' expressions are evaluated as
  35                                    `float'.  */
  36 typedef double double_t;        /* `double' expressions are evaluated as
  37                                    `double'.  */
  38
  39 /* Signal that types stay as they were declared.  */
  40 #define FLT_EVAL_METHOD 0
  41
  42 /* Define `INFINITY' as value of type `float_t'.  */
  43 #define INFINITY        HUGE_VALF
  44
  45 #else
  46
  47 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
  48 typedef double float_t;         /* `float' expressions are evaluated as
  49                                    `double'.  */
  50 typedef double double_t;        /* `double' expressions are evaluated as
  51                                    `double'.  */
  52
  53 /* Signal that both types are `double'.  */
  54 #define FLT_EVAL_METHOD 1
  55
  56 /* Define `INFINITY' as value of type `float_t'.  */
  57 #define INFINITY        HUGE_VAL
  58
  59 #endif
  60 #else
  61
  62 /* Wild guess at types for float_t and double_t. */
  63 typedef double float_t;
  64 typedef double double_t;
  65
  66 /* Strange compiler, we don't know how it works.  */
  67 #define FLT_EVAL_METHOD -1
  68
  69 /* Define `INFINITY' as value of type `float_t'.  */
  70 #define INFINITY        HUGE_VAL
  71
  72 #endif
  73
  74 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  75 #define FP_ILOGB0       0x80000001
  76 #define FP_ILOGBNAN     0x7fffffff