fenv.h revision 1.1 
1/*	$NetBSD: fenv.h,v 1.1 2011/05/20 21:42:49 nakayama Exp $	*/
2
3/*-
4 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#ifndef	_SPARC_FENV_H_
32#define	_SPARC_FENV_H_
33
34#include <sys/stdint.h>
35
36#ifdef __arch64__
37typedef	uint64_t	fenv_t;
38typedef	uint64_t	fexcept_t;
39#else
40typedef	uint32_t	fenv_t;
41typedef	uint32_t	fexcept_t;
42#endif
43
44/*
45 * Exception flags
46 *
47 * Symbols are defined in such a way, to correspond to the accrued
48 * exception bits (aexc) fields of FSR.
49 */
50#define	FE_INEXACT      0x00000020	/* 0000100000 */
51#define	FE_DIVBYZERO    0x00000040	/* 0001000000 */
52#define	FE_UNDERFLOW    0x00000080	/* 0010000000 */
53#define	FE_OVERFLOW     0x00000100	/* 0100000000 */
54#define	FE_INVALID	0x00000200	/* 1000000000 */
55
56#define	FE_ALL_EXCEPT	(FE_DIVBYZERO | FE_INEXACT | \
57    FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
58
59/*
60 * Rounding modes
61 *
62 * We can't just use the hardware bit values here, because that would
63 * make FE_UPWARD and FE_DOWNWARD negative, which is not allowed.
64 */
65#define	FE_TONEAREST	0x0
66#define	FE_TOWARDZERO	0x1
67#define	FE_UPWARD	0x2
68#define	FE_DOWNWARD	0x3
69#define	_ROUND_MASK	(FE_TONEAREST | FE_DOWNWARD | \
70    FE_UPWARD | FE_TOWARDZERO)
71#define	_ROUND_SHIFT	30
72
73__BEGIN_DECLS
74
75/* Default floating-point environment */
76extern const fenv_t	__fe_dfl_env;
77#define	FE_DFL_ENV	(&__fe_dfl_env)
78
79/* We need to be able to map status flag positions to mask flag positions */
80#define	_FPUSW_SHIFT	18
81#define	_ENABLE_MASK	(FE_ALL_EXCEPT << _FPUSW_SHIFT)
82
83__END_DECLS
84
85#endif	/* !_SPARC_FENV_H_ */
86