fpsetround.c revision 1.1 
1/*	$NetBSD: fpsetround.c,v 1.1 2000/12/29 20:13:53 bjh21 Exp $	*/
2
3/*
4 * Copyright (c) 1996 Mark Brinicombe
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 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Mark Brinicombe
18 *	for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/types.h>
35#include <ieeefp.h>
36
37/*
38 * Return the current FP rounding mode
39 *
40 * ok all we need to do is return the current FP rounding mode
41 *
42 * HOWEVER:
43 * The ARM FPA codes the rounding mode into the actual FP instructions
44 * so there is no such thing as a global rounding mode.
45 * The default is round to nearest if rounding is not explictly specified.
46 * FP instructions generated by GCC will not explicitly specify a rounding
47 * mode.
48 *
49 * All we can do is abort
50 *
51 * This could change in the future with new floating point emulators or
52 * soft float FP libraries.
53 */
54
55fp_rnd
56fpsetround(rnd_dir)
57	fp_rnd rnd_dir;
58{
59	fp_rnd old_rnd;
60
61	old_rnd = fpgetround();
62
63	abort();
64	return(old_rnd);
65}
66