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
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <strings.h>
28
29 #define CMPB(result,a,b) \
30 asm __volatile ("cmpb %0, %1, %2\n" : "=r"(result) : "r"(a), "r"(b))
31
32
main(int argc,char * argv[])33 int main(int argc, char *argv[])
34 {
35 int i, j, k;
36 long mask;
37 for (i = 1; i < 16; i++) {
38 mask = 0;
39 if (i & 1)
40 mask += 0xff;
41 if (i & 2)
42 mask += 0xff00;
43 if (i & 4)
44 mask += 0xff0000;
45 if (i & 8)
46 mask += 0xff000000;
47
48 for (j = 0; j < 256; j++)
49 for (k = 0; k < 256; k++)
50 if (j != k) {
51
52 long a, b, result;
53 a = (mask & (j * 0x1010101)) + ((~mask) & (k * 0x1010101));
54 b = j * 0x1010101;
55 CMPB(result, a, b);
56 if (result != mask) {
57 printf("%llx %llx %llx %llx\n",
58 (unsigned long long) mask, (unsigned long long) a,
59 (unsigned long long) b,
60 (unsigned long long) result);
61 exit(1);
62 }
63 }
64
65 }
66
67 return 0;
68 }
69