sysdeps/powerpc/bits/mathdef.h

   1 /* Copyright (C) 1997,1998,1999,2000,2003,2004,2006,2010
   2         Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #if !defined _MATH_H && !defined _COMPLEX_H
  21 # error "Never use <bits/mathdef.h> directly; include <math.h> instead"
  22 #endif
  23
  24
  25 /* FIXME! This file describes properties of the compiler, not the machine;
  26    it should not be part of libc!
  27
  28    FIXME! This file does not deal with the -fshort-double option of
  29    gcc! */
  30
  31 #if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF
  32 # define _MATH_H_MATHDEF        1
  33
  34 # ifdef __GNUC__
  35 #  if __STDC__ == 1
  36
  37 /* In GNU or ANSI mode, gcc leaves `float' expressions as-is.  */
  38 typedef float float_t;          /* `float' expressions are evaluated as
  39                                    `float'.  */
  40 typedef double double_t;        /* `double' expressions are evaluated as
  41                                    `double'.  */
  42
  43 #  else
  44
  45 /* For `gcc -traditional', `float' expressions are evaluated as `double'. */
  46 typedef double float_t;         /* `float' expressions are evaluated as
  47                                    `double'.  */
  48 typedef double double_t;        /* `double' expressions are evaluated as
  49                                    `double'.  */
  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 # endif
  59
  60 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  61 # define FP_ILOGB0      (-2147483647)
  62 # define FP_ILOGBNAN    (2147483647)
  63
  64 /* The powerpc has a combined multiply/add instruction.  */
  65 # define FP_FAST_FMA 1
  66 # define FP_FAST_FMAF 1
  67
  68 #endif  /* ISO C99 */