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/* Copyright (C) 2004, 2005, 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/>. */
#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif
/* Define bits representing exceptions in the FPU status word. */
enum
{
FE_INVALID = 1,
#define FE_INVALID FE_INVALID
FE_DIVBYZERO = 2,
#define FE_DIVBYZERO FE_DIVBYZERO
FE_OVERFLOW = 4,
#define FE_OVERFLOW FE_OVERFLOW
FE_UNDERFLOW = 8,
#define FE_UNDERFLOW FE_UNDERFLOW
FE_INEXACT = 16,
#define FE_INEXACT FE_INEXACT
};
/* Amount to shift by to convert an exception to a mask bit. */
#define FE_EXCEPT_SHIFT 8
/* All supported exceptions. */
#define FE_ALL_EXCEPT \
(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
/* VFP supports all of the four defined rounding modes. */
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_UPWARD = 0x400000,
#define FE_UPWARD FE_UPWARD
FE_DOWNWARD = 0x800000,
#define FE_DOWNWARD FE_DOWNWARD
FE_TOWARDZERO = 0xc00000
#define FE_TOWARDZERO FE_TOWARDZERO
};
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* Type representing floating-point environment. */
typedef struct
{
unsigned int __cw;
}
fenv_t;
/* If the default argument is used we use this value. */
#define FE_DFL_ENV ((fenv_t *) -1l)
#ifdef __USE_GNU
/* Floating-point environment where none of the exceptions are masked. */
# define FE_NOMASK_ENV ((const fenv_t *) -2)
#endif
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