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/* Copyright (C) 2002-2003, George Thanos <george.thanos@gdt.gr>
Yannis Mitsos <yannis.mitsos@gdt.gr>
Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif
/* Define bits representing the exception. We use the bit positions of
the appropriate bits in the SR. */
enum
{
FE_INEXACT = (1 << 8),
#define FE_INEXACT FE_INEXACT
FE_UNDERFLOW = (1 << 9),
#define FE_UNDERFLOW FE_UNDERFLOW
FE_OVERFLOW = (1 << 10),
#define FE_OVERFLOW FE_OVERFLOW
FE_DIVBYZERO = (1 << 11),
#define FE_DIVBYZERO FE_DIVBYZERO
FE_INVALID = (1 << 12)
#define FE_INVALID FE_INVALID
};
#define FE_ALL_EXCEPT \
(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
/* We support all of the four defined rounding modes. We use
the bit positions in the FPCR Mode Control Byte as the values for the
appropriate macros. */
enum
{
FE_TONEAREST = 0,
#define FE_TONEAREST FE_TONEAREST
FE_TOWARDZERO = 1 << 13 ,
#define FE_TOWARDZERO FE_TOWARDZERO
FE_DOWNWARD = 2 << 13,
#define FE_DOWNWARD FE_DOWNWARD
FE_UPWARD = 3 << 13
#define FE_UPWARD FE_UPWARD
};
/* Type representing exception flags. */
typedef unsigned int fexcept_t;
/* Type representing floating-point environment.*/
typedef struct
{
unsigned int round_mode;
unsigned int trap_enabled;
unsigned int accrued_except;
unsigned int actual_except;
} fenv_t;
#if 0
/* If the default argument is used we use this value. */
const fenv FE_DFL_ENV_OBJ = {0, 0x1C00, 0}
#define FE_DFL_ENV (&FE_DFL_ENV_OBJ)
#ifdef __USE_GNU
/* Floating-point environment where none of the exceptions are masked. */
const fenv_t FE_NOMASK_ENV_OBJ = { 0, 0x1F00, 0 };
# define FE_NOMASK_ENV (&FE_NOMASK_ENV_OBJ)
#endif
#endif
#include <bits/fenvinline.h>
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