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      1 /*	$NetBSD: divrem.c,v 1.4 2003/08/07 16:43:18 agc 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. 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 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)divrem.c	8.1 (Berkeley) 6/4/93";
     45 #else
     46 static char rcsid[] = "$NetBSD: divrem.c,v 1.4 2003/08/07 16:43:18 agc Exp $";
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <stdio.h>
     51 
     52 main()
     53 {
     54 	union { long long q; unsigned int 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, "%u:%u %u:%u",
     64 			    &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
     65 		    sscanf(buf, "0x%x:%x 0x%x:%x",
     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("%x:%x /%% %x:%x => q=%x:%x r=%x:%x\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("  = %X%08X / %X%08X => %X%08X\n\
     75   = %X%08X %% %X%08X => %X%08X\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