1/*-
2 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $
27 */
28
29#ifndef _I387_FENV_H_
30#define _I387_FENV_H_
31
32#include <sys/types.h>
33
34__BEGIN_DECLS
35
36/*
37 * To preserve binary compatibility with FreeBSD 5.3, we pack the
38 * mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
39 */
40typedef struct {
41  __uint16_t __control;
42  __uint16_t __mxcsr_hi;
43  __uint16_t __status;
44  __uint16_t __mxcsr_lo;
45  __uint32_t __tag;
46  char       __other[16];
47} fenv_t;
48
49typedef __uint16_t fexcept_t;
50
51/* Exception flags */
52#define FE_INVALID    0x01
53#define FE_DENORMAL   0x02
54#define FE_DIVBYZERO  0x04
55#define FE_OVERFLOW   0x08
56#define FE_UNDERFLOW  0x10
57#define FE_INEXACT    0x20
58#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
59                       FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
60
61/* Rounding modes */
62#define FE_TONEAREST  0x0000
63#define FE_DOWNWARD   0x0400
64#define FE_UPWARD     0x0800
65#define FE_TOWARDZERO 0x0c00
66
67__END_DECLS
68
69#endif /* !I387_FENV_H_ */
70