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_ */
105