| Current File : //usr/include/bits/mathdef.h |
/* Copyright (C) 2001-2012 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#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 && !defined _MATH_H_MATHDEF
# define _MATH_H_MATHDEF 1
# if defined __x86_64__ || (defined __FLT_EVAL_METHOD__ && __FLT_EVAL_METHOD__ == 0)
/* The x86-64 architecture computes values with the precission of the
used type. Similarly for -m32 -mfpmath=sse. */
typedef float float_t; /* `float' expressions are evaluated as `float'. */
typedef double double_t; /* `double' expressions are evaluated
as `double'. */
# else
/* 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'. */
# endif
/* The values returned by `ilogb' for 0 and NaN respectively. */
# define FP_ILOGB0 (-2147483647 - 1)
# define FP_ILOGBNAN (-2147483647 - 1)
/* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
builtins are supported. */
# ifdef __FP_FAST_FMA
# define FP_FAST_FMA 1
# endif
# ifdef __FP_FAST_FMAF
# define FP_FAST_FMAF 1
# endif
# ifdef __FP_FAST_FMAL
# define FP_FAST_FMAL 1
# endif
#endif /* ISO C99 */