divrem.c revision 1.3 1 /* $NetBSD: divrem.c,v 1.3 2002/10/20 10:15:48 scw Exp $ */
2
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. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #ifndef lint
41 static char copyright[] =
42 "@(#) Copyright (c) 1992, 1993\n\
43 The Regents of the University of California. All rights reserved.\n";
44 #endif /* not lint */
45
46 #ifndef lint
47 #if 0
48 static char sccsid[] = "@(#)divrem.c 8.1 (Berkeley) 6/4/93";
49 #else
50 static char rcsid[] = "$NetBSD: divrem.c,v 1.3 2002/10/20 10:15:48 scw Exp $";
51 #endif
52 #endif /* not lint */
53
54 #include <stdio.h>
55
56 main()
57 {
58 union { long long q; unsigned int v[2]; } a, b, q, r;
59 char buf[300];
60 extern long long __qdivrem(unsigned long long, unsigned long long,
61 unsigned long long *);
62
63 for (;;) {
64 printf("> ");
65 if (fgets(buf, sizeof buf, stdin) == NULL)
66 break;
67 if (sscanf(buf, "%u:%u %u:%u",
68 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
69 sscanf(buf, "0x%x:%x 0x%x:%x",
70 &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
71 printf("eh?\n");
72 continue;
73 }
74 q.q = __qdivrem(a.q, b.q, &r.q);
75 printf("%x:%x /%% %x:%x => q=%x:%x r=%x:%x\n",
76 a.v[0], a.v[1], b.v[0], b.v[1],
77 q.v[0], q.v[1], r.v[0], r.v[1]);
78 printf(" = %X%08X / %X%08X => %X%08X\n\
79 = %X%08X %% %X%08X => %X%08X\n",
80 a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1],
81 a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]);
82 }
83 exit(0);
84 }
85