1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1992, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#if defined(LIBC_SCCS) && !defined(lint)
41static char sccsid[] = "@(#)mul.c	8.1 (Berkeley) 6/4/93";
42#endif /* LIBC_SCCS and not lint */
43#include <sys/cdefs.h>
44__FBSDID("$FreeBSD$");
45
46#include <stdio.h>
47
48main()
49{
50	union { long long q; unsigned long v[2]; } a, b, m;
51	char buf[300];
52	extern long long __muldi3(long long, long long);
53
54	for (;;) {
55		printf("> ");
56		if (fgets(buf, sizeof buf, stdin) == NULL)
57			break;
58		if (sscanf(buf, "%lu:%lu %lu:%lu",
59			    &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
60		    sscanf(buf, "0x%lx:%lx 0x%lx:%lx",
61			    &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
62			printf("eh?\n");
63			continue;
64		}
65		m.q = __muldi3(a.q, b.q);
66		printf("%lx:%lx * %lx:%lx => %lx:%lx\n",
67		    a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]);
68		printf("  = %lX%08lX * %lX%08lX => %lX%08lX\n",
69		    a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]);
70	}
71	exit(0);
72}
73