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
main(int argc,char * argv[])32 int 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