/*      $NetBSD: fenv.h,v 1.26 2017/04/09 15:29:07 christos Exp $       */
/*
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FENV_H_
#define _FENV_H_

#include <sys/featuretest.h>

#if defined(__vax__)
# ifndef __TEST_FENV
#  error        "fenv.h is currently not supported for this architecture"
# endif
typedef int fexcept_t;
typedef int fenv_t;
#else
# define __HAVE_FENV
# include <machine/fenv.h>
#endif

#if \
       (defined(__arm__) && defined(__SOFTFP__)) || \
       (defined(__m68k__) && !defined(__HAVE_68881__)) || \
       defined(__mips_soft_float) || \
       (defined(__powerpc__) && defined(_SOFT_FLOAT)) || \
       (defined(__sh__) && !defined(__SH_FPU_ANY__)) || \
       0

/*
* Common definitions for softfloat.
*/

#ifndef __HAVE_FENV_SOFTFLOAT_DEFS

typedef int fexcept_t;

typedef struct {
       int     __flags;
       int     __mask;
       int     __round;
} fenv_t;

#define __FENV_GET_FLAGS(__envp)        (__envp)->__flags
#define __FENV_GET_MASK(__envp)         (__envp)->__mask
#define __FENV_GET_ROUND(__envp)        (__envp)->__round
#define __FENV_SET_FLAGS(__envp, __val) \
       (__envp)->__flags = (__val)
#define __FENV_SET_MASK(__envp, __val) \
       (__envp)->__mask = (__val)
#define __FENV_SET_ROUND(__envp, __val) \
       (__envp)->__round = (__val)

#endif /* __FENV_GET_FLAGS */

#endif /* softfloat */

__BEGIN_DECLS

/* Function prototypes */
int     feclearexcept(int);
int     fegetexceptflag(fexcept_t *, int);
int     feraiseexcept(int);
int     fesetexceptflag(const fexcept_t *, int);
int     fetestexcept(int);
int     fegetround(void);
int     fesetround(int);
int     fegetenv(fenv_t *);
int     feholdexcept(fenv_t *);
int     fesetenv(const fenv_t *);
int     feupdateenv(const fenv_t *);

#if defined(_NETBSD_SOURCE) || defined(_GNU_SOURCE)

int     feenableexcept(int);
int     fedisableexcept(int);
int     fegetexcept(void);

#endif /* _NETBSD_SOURCE || _GNU_SOURCE */

__END_DECLS

#endif /* ! _FENV_H_ */