lib/libc/quad/TESTS/mul.c

   1 /*      $NetBSD: mul.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. 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[] = "@(#)mul.c       8.1 (Berkeley) 6/4/93";
  45 #else
  46 static char rcsid[] = "$NetBSD: mul.c,v 1.3 2002/10/20 10:15:48 scw 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, m;
  55         char buf[300];
  56         extern long long __muldi3(long long, long long);
  57
  58         for (;;) {
  59                 printf("> ");
  60                 if (fgets(buf, sizeof buf, stdin) == NULL)
  61                         break;
  62                 if (sscanf(buf, "%u:%u %u:%u",
  63                             &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4 &&
  64                     sscanf(buf, "0x%x:%x 0x%x:%x",
  65                             &a.v[0], &a.v[1], &b.v[0], &b.v[1]) != 4) {
  66                         printf("eh?\n");
  67                         continue;
  68                 }
  69                 m.q = __muldi3(a.q, b.q);
  70                 printf("%x:%x * %x:%x => %x:%x\n",
  71                     a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]);
  72                 printf("  = %X%08X * %X%08X => %X%08X\n",
  73                     a.v[0], a.v[1], b.v[0], b.v[1], m.v[0], m.v[1]);
  74         }
  75         exit(0);
  76 }