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