modernc.org/cc@v1.0.1/v2/headers/linux_amd64/usr/include/bits/mathdef.h (about)

     1  /* Copyright (C) 2001-2015 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  # if defined __x86_64__ || (defined __FLT_EVAL_METHOD__ && __FLT_EVAL_METHOD__ == 0)
    26  /* The x86-64 architecture computes values with the precission of the
    27     used type.  Similarly for -m32 -mfpmath=sse.  */
    28  typedef float float_t;		/* `float' expressions are evaluated as `float'.  */
    29  typedef double double_t;	/* `double' expressions are evaluated
    30  				   as `double'.  */
    31  # else
    32  /* The ix87 FPUs evaluate all values in the 80 bit floating-point format
    33     which is also available for the user as `long double'.  Therefore we
    34     define:  */
    35  typedef long double float_t;	/* `float' expressions are evaluated as
    36  				   `long double'.  */
    37  typedef long double double_t;	/* `double' expressions are evaluated as
    38  				   `long double'.  */
    39  # endif
    40  
    41  /* The values returned by `ilogb' for 0 and NaN respectively.  */
    42  # define FP_ILOGB0	(-2147483647 - 1)
    43  # define FP_ILOGBNAN	(-2147483647 - 1)
    44  
    45  /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
    46     builtins are supported.  */
    47  # ifdef __FP_FAST_FMA
    48  #  define FP_FAST_FMA 1
    49  # endif
    50  
    51  # ifdef __FP_FAST_FMAF
    52  #  define FP_FAST_FMAF 1
    53  # endif
    54  
    55  # ifdef __FP_FAST_FMAL
    56  #  define FP_FAST_FMAL 1
    57  # endif
    58  
    59  #endif				/* ISO C99 */