/* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   Copyright (C) 2009-2012.

   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 FPSR status word.  */
#define FE_INVALID     1
#define FE_DIVBYZERO   2
#define FE_OVERFLOW    4
#define FE_UNDERFLOW   8
#define FE_INEXACT    16

/* Amount to shift by to convert an exception bit in FPSR to a an
   exception bit mask in FPCR.  */
#define FE_EXCEPT_SHIFT	8

/* All supported exceptions.  */
#define FE_ALL_EXCEPT	\
	(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)

/* Define bits representing rounding modes in the FPCR Rmode field.  */
#define FE_TONEAREST  0x000000
#define FE_UPWARD     0x400000
#define FE_DOWNWARD   0x800000
#define FE_TOWARDZERO 0xc00000

/* Type representing exception flags. */
typedef unsigned int fexcept_t;

/* Type representing floating-point environment.  */
typedef struct
  {
    unsigned int fpcr;
    unsigned int fpsr;
  }
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