test.c revision 139595 
1/*
2 * Copyright (c) 2005 Marcel Moolenaar
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 *
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/tools/regression/ia64/unaligned/test.c 139595 2005-01-02 21:33:40Z marcel $
27 */
28
29#include <string.h>
30
31struct {
32	DATA_TYPE aligned;
33	char _;
34	char misaligned[sizeof(DATA_TYPE)];
35} data;
36
37int
38main()
39{
40	DATA_TYPE *aligned = &data.aligned;
41	DATA_TYPE *misaligned = (DATA_TYPE *)data.misaligned;
42	DATA_TYPE value = DATA_VALUE;
43
44	/* Set PSR.ac. */
45	asm volatile("sum 8");
46
47#if defined(TEST_STORE)
48	/* Misaligned store. */
49	*misaligned = value;
50	memcpy(aligned, misaligned, sizeof(DATA_TYPE));
51#elif defined(TEST_LOAD)
52	memcpy(misaligned, &value, sizeof(DATA_TYPE));
53	/* Misaligned load. */
54	*aligned = *misaligned;
55#else
56#error Define TEST_LOAD or TEST_STORE
57#endif
58
59	return (*aligned == value) ? 0 : 1;
60}
61