glibc/sysdeps/i386/fpu/bits/mathdef.h

/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#if !defined _MATH_H && !defined _COMPLEX_H
# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
#endif

#if defined __USE_ISOC99 && defined _MATH_H
/* The ix87 FPUs evaluate all values in the 80 bit floating-point format
   which is also available for the user as `long double'.  Therefore we
   define:  */
typedef long double float_t;	/* `float' expressions are evaluated as
				   `long double'.  */
typedef long double double_t;	/* `double' expressions are evaluated as
				   `long double'.  */

/* Signal that both types are `long double'.  */
# define FLT_EVAL_METHOD	2

/* Define `INFINITY' as value of type `float'.  */
# define INFINITY	HUGE_VALF

/* The values returned by `ilogb' for 0 and NaN respectively.  */
# define FP_ILOGB0	0x80000000
# define FP_ILOGBNAN	0x80000000

/* Number of decimal digits for the `long double' type.  */
# define DECIMAL_DIG	18

#endif	/* ISO C99 */