1/*	$NetBSD: fenv.h,v 1.26 2017/04/09 15:29:07 christos Exp $	*/
  2/*
  3 * Copyright (c) 2010 The NetBSD Foundation, Inc.
  4 * All rights reserved.
  5 *
  6 * Redistribution and use in source and binary forms, with or without
  7 * modification, are permitted provided that the following conditions
  8 * are met:
  9 * 1. Redistributions of source code must retain the above copyright
 10 *    notice, this list of conditions and the following disclaimer.
 11 * 2. Redistributions in binary form must reproduce the above copyright
 12 *    notice, this list of conditions and the following disclaimer in the
 13 *    documentation and/or other materials provided with the distribution.
 14 *
 15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 25 * POSSIBILITY OF SUCH DAMAGE.
 26 */
 27#ifndef _FENV_H_
 28#define _FENV_H_
 29
 30#include <sys/featuretest.h>
 31
 32#if defined(__vax__)
 33# ifndef __TEST_FENV
 34#  error	"fenv.h is currently not supported for this architecture"
 35# endif
 36typedef int fexcept_t;
 37typedef int fenv_t;
 38#else
 39# define __HAVE_FENV
 40# include <machine/fenv.h>
 41#endif
 42
 43#if \
 44	(defined(__arm__) && defined(__SOFTFP__)) || \
 45	(defined(__m68k__) && !defined(__HAVE_68881__)) || \
 46	defined(__mips_soft_float) || \
 47	(defined(__powerpc__) && defined(_SOFT_FLOAT)) || \
 48	(defined(__sh__) && !defined(__SH_FPU_ANY__)) || \
 49	0
 50
 51/*
 52 * Common definitions for softfloat.
 53 */
 54
 55#ifndef __HAVE_FENV_SOFTFLOAT_DEFS
 56
 57typedef int fexcept_t;
 58
 59typedef struct {
 60	int	__flags;
 61	int	__mask;
 62	int	__round;
 63} fenv_t;
 64
 65#define __FENV_GET_FLAGS(__envp)	(__envp)->__flags
 66#define __FENV_GET_MASK(__envp)		(__envp)->__mask
 67#define __FENV_GET_ROUND(__envp)	(__envp)->__round
 68#define __FENV_SET_FLAGS(__envp, __val) \
 69	(__envp)->__flags = (__val)
 70#define __FENV_SET_MASK(__envp, __val) \
 71	(__envp)->__mask = (__val)
 72#define __FENV_SET_ROUND(__envp, __val) \
 73	(__envp)->__round = (__val)
 74
 75#endif /* __FENV_GET_FLAGS */
 76
 77#endif /* softfloat */
 78
 79__BEGIN_DECLS
 80
 81/* Function prototypes */
 82int	feclearexcept(int);
 83int	fegetexceptflag(fexcept_t *, int);
 84int	feraiseexcept(int);
 85int	fesetexceptflag(const fexcept_t *, int);
 86int	fetestexcept(int);
 87int	fegetround(void);
 88int	fesetround(int);
 89int	fegetenv(fenv_t *);
 90int	feholdexcept(fenv_t *);
 91int	fesetenv(const fenv_t *);
 92int	feupdateenv(const fenv_t *);
 93
 94#if defined(_NETBSD_SOURCE) || defined(_GNU_SOURCE)
 95
 96int	feenableexcept(int);
 97int	fedisableexcept(int);
 98int	fegetexcept(void);
 99
100#endif /* _NETBSD_SOURCE || _GNU_SOURCE */
101
102__END_DECLS
103
104#endif /* ! _FENV_H_ */