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glibc/bits/mathdef.h
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/* Copyright (C) 1997-2016 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 | |
/* Normally, there is no long double type and the `float' and `double' | |
expressions are evaluated as `double'. */ | |
typedef double float_t; /* `float' expressions are evaluated as | |
`double'. */ | |
typedef double double_t; /* `double' expressions are evaluated as | |
`double'. */ | |
/* The values returned by `ilogb' for 0 and NaN respectively. */ | |
# define FP_ILOGB0 (-2147483647) | |
# define FP_ILOGBNAN 2147483647 | |
/* 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 */ | |
#ifndef __NO_LONG_DOUBLE_MATH | |
/* Signal that we do not really have a `long double'. The disables the | |
declaration of all the `long double' function variants. */ | |
# define __NO_LONG_DOUBLE_MATH 1 | |
#endif |