usr/src/lib/libc/quad/TESTS/divrem.c

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1992, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)divrem.c    8.1 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>

main()
{
        union { long long q; unsigned long v[2]; } a, b, q, r;
        char buf[300];
        extern long long __qdivrem(unsigned long long, unsigned long long,
            unsigned long long *);

        for (;;) {
                printf("> ");
                if (fgets(buf, sizeof buf, stdin) == NULL)
                        break;
                if (sscanf(buf, "%lu:%lu %lu:%lu",
                            &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
                    sscanf(buf, "0x%lx:%lx 0x%lx:%lx",
                            &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
                        printf("eh?\n");
                        continue;
                }
                q.q = __qdivrem(a.q, b.q, &r.q);
                printf("%lx:%lx /%% %lx:%lx => q=%lx:%lx r=%lx:%lx\n",
                    a.v[0], a.v[1], b.v[0], b.v[1],
                    q.v[0], q.v[1], r.v[0], r.v[1]);
                printf("  = %lX%08lX / %lX%08lX => %lX%08lX\n\
  = %lX%08lX %% %lX%08lX => %lX%08lX\n",
                    a.v[0], a.v[1], b.v[0], b.v[1], q.v[0], q.v[1],
                    a.v[0], a.v[1], b.v[0], b.v[1], r.v[0], r.v[1]);
        }
        exit(0);
}