divrem.c revision 92986 
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 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#ifndef lint
39static char copyright[] =
40"@(#) Copyright (c) 1992, 1993\n\
41	The Regents of the University of California.  All rights reserved.\n";
42#endif /* not lint */
43
44#if defined(LIBC_SCCS) && !defined(lint)
45static char sccsid[] = "@(#)divrem.c	8.1 (Berkeley) 6/4/93";
46#endif /* LIBC_SCCS and not lint */
47#include <sys/cdefs.h>
48__FBSDID("$FreeBSD: head/lib/libc/quad/TESTS/divrem.c 92986 2002-03-22 21:53:29Z obrien $");
49
50#include <stdio.h>
51
52main()
53{
54	union { long long q; unsigned long v[2]; } a, b, q, r;
55	char buf[300];
56	extern long long __qdivrem(unsigned long long, unsigned long long,
57	    unsigned long long *);
58
59	for (;;) {
60		printf("> ");
61		if (fgets(buf, sizeof buf, stdin) == NULL)
62			break;
63		if (sscanf(buf, "%lu:%lu %lu:%lu",
64			    &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
65		    sscanf(buf, "0x%lx:%lx 0x%lx:%lx",
66			    &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
67			printf("eh?\n");
68			continue;
69		}
70		q.q = __qdivrem(a.q, b.q, &r.q);
71		printf("%lx:%lx /%% %lx:%lx => q=%lx:%lx r=%lx:%lx\n",
72		    a.v[0], a.v[1], b.v[0], b.v[1],
73		    q.v[0], q.v[1], r.v[0], r.v[1]);
74		printf("  = %lX%08lX / %lX%08lX => %lX%08lX\n\
75  = %lX%08lX %% %lX%08lX => %lX%08lX\n",
76		    a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1],
77		    a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]);
78	}
79	exit(0);
80}
81