src/system/libroot/posix/glibc/include/arch/x86_64/bits/mathdef.h

   1 /* Copyright (C) 2001-2012 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 /* The x86-64 architecture computes values with the precission of the
  26    used type.  Similarly for -m32 -mfpmath=sse.  */
  27 typedef float float_t;          /* `float' expressions are evaluated as `float'.  */
  28 typedef double double_t;        /* `double' expressions are evaluated
  29                                    as `double'.  */
  30
  31 #define FLT_EVAL_METHOD 0
  32
  33 #if __GNUC_PREREQ(3,3)
  34 # define INFINITY   (__builtin_inff())
  35 #else
  36 # define INFINITY   HUGE_VALF
  37 #endif
  38
  39 /* The values returned by `ilogb' for 0 and NaN respectively.  */
  40 # define FP_ILOGB0      (-2147483647 - 1)
  41 # define FP_ILOGBNAN    (-2147483647 - 1)
  42
  43 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
  44    builtins are supported.  */
  45 # if __FP_FAST_FMA
  46 #  define FP_FAST_FMA 1
  47 # endif
  48
  49 # if __FP_FAST_FMAF
  50 #  define FP_FAST_FMAF 1
  51 # endif
  52
  53 # if __FP_FAST_FMAL
  54 #  define FP_FAST_FMAL 1
  55 # endif
  56
  57 #endif  /* ISO C99 */