[thirdparty/glibc.git] / sysdeps / generic / bits / fenv.h

/* Copyright (C) 1997 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  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


/* Here should be the exception be defined:
    FE_INVALID
    FE_DIVBYZERO
    FE_OVERFLOW
    FE_UNDERFLOW
    FE_INEXACT
   We define no macro which signals no exception is supported.  */

#define FE_ALL_EXCEPT 0


/* Here should the rounding modes be defined:
    FE_TONEAREST
    FE_DOWNWARD
    FE_UPWARD
    FE_TOWARDSZERO
   We define no macro which signals no rounding mode is selectable.  */


/* Type representing exception flags.
   XXX Probably we should also include the signal handler here.  */
typedef struct
  {
    unsigned int flags;
  }
fexcept_t;


/* Type representing floating-point environment.  */
typedef struct
  {
    fexcept_t excepts;
    /* XXX I don't know what else we should save.  */
  }
fenv_t;

/* If the default argument is used we use this value.  */
#define FE_DFL_ENV	((fenv_t *) -1l)
Commit	Line	Data
63551311 UD	1	/* Copyright (C) 1997 Free Software Foundation, Inc.
	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
	13
	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If not,
	16	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	Boston, MA 02111-1307, USA. */
	18
5107cf1d	19	#ifndef _FENV_H
f4017d20	20	# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
5107cf1d	21	#endif
63551311	22
63551311 UD	23
	24	/* Here should be the exception be defined:
	25	FE_INVALID
	26	FE_DIVBYZERO
	27	FE_OVERFLOW
	28	FE_UNDERFLOW
	29	FE_INEXACT
	30	We define no macro which signals no exception is supported. */
	31
	32	#define FE_ALL_EXCEPT 0
	33
	34
	35	/* Here should the rounding modes be defined:
	36	FE_TONEAREST
	37	FE_DOWNWARD
	38	FE_UPWARD
	39	FE_TOWARDSZERO
	40	We define no macro which signals no rounding mode is selectable. */
	41
	42
	43	/* Type representing exception flags.
	44	XXX Probably we should also include the signal handler here. */
	45	typedef struct
	46	{
	47	unsigned int flags;
	48	}
	49	fexcept_t;
	50
	51
	52	/* Type representing floating-point environment. */
	53	typedef struct
	54	{
	55	fexcept_t excepts;
	56	/* XXX I don't know what else we should save. */
	57	}
	58	fenv_t;
	59
	60	/* If the default argument is used we use this value. */
	61	#define FE_DFL_ENV ((fenv_t *) -1l)