power6_bcmp.c revision e739ac0589b4fb43561f801c4faba8c1b89f8680 
1/*  Copyright (C) 2007 IBM
2
3    Author: Pete Eberlein  eberlein@us.ibm.com
4
5    This program is free software; you can redistribute it and/or
6    modify it under the terms of the GNU General Public License as
7    published by the Free Software Foundation; either version 2 of the
8    License, or (at your option) any later version.
9
10    This program is distributed in the hope that it will be useful, but
11    WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    General Public License for more details.
14
15    You should have received a copy of the GNU General Public License
16    along with this program; if not, write to the Free Software
17    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18    02111-1307, USA.
19
20    The GNU General Public License is contained in the file COPYING.
21*/
22
23
24#include <stdio.h>
25#include <stdlib.h>
26#include <strings.h>
27
28#define CMPB(result,a,b) \
29    asm ("cmpb %0, %1, %2\n" : "=r"(result) : "r"(a), "r"(b))
30
31
32int main(int argc, char *argv[])
33{
34   int i, j, k;
35   unsigned long mask;
36   for (i = 1; i < 256; i++) {
37      mask = 0;
38      if (i & 1)
39         mask += 0xff;
40      if (i & 2)
41         mask += 0xff00;
42      if (i & 4)
43         mask += 0xff0000;
44      if (i & 8)
45         mask += 0xff000000;
46      if (i & 16)
47         mask += 0xff00000000;
48      if (i & 32)
49         mask += 0xff0000000000;
50      if (i & 64)
51         mask += 0xff000000000000;
52      if (i & 128)
53         mask += 0xff00000000000000;
54
55      for (j = 0; j < 256; j++)
56         for (k = 0; k < 256; k++)
57            if (j != k) {
58
59               unsigned long a, b, result;
60               a = (mask & (j * 0x101010101010101)) +
61                   ((~mask) & (k * 0x101010101010101));
62               b = j * 0x101010101010101;
63               CMPB(result, a, b);
64               if (result != mask) {
65                  printf("%8lx %8lx %8lx %8lx\n", mask, a, b, result);
66                  exit(1);
67               }
68            }
69
70   }
71
72   return 0;
73}
74