| /* Copyright (C) 2007 IBM |
| |
| Author: Pete Eberlein eberlein@us.ibm.com |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <strings.h> |
| |
| #define CMPB(result,a,b) \ |
| asm __volatile ("cmpb %0, %1, %2\n" : "=r"(result) : "r"(a), "r"(b)) |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| int i, j, k; |
| long mask; |
| for (i = 1; i < 16; i++) { |
| mask = 0; |
| if (i & 1) |
| mask += 0xff; |
| if (i & 2) |
| mask += 0xff00; |
| if (i & 4) |
| mask += 0xff0000; |
| if (i & 8) |
| mask += 0xff000000; |
| |
| for (j = 0; j < 256; j++) |
| for (k = 0; k < 256; k++) |
| if (j != k) { |
| |
| long a, b, result; |
| a = (mask & (j * 0x1010101)) + ((~mask) & (k * 0x1010101)); |
| b = j * 0x1010101; |
| CMPB(result, a, b); |
| if (result != mask) { |
| printf("%llx %llx %llx %llx\n", |
| (unsigned long long) mask, (unsigned long long) a, |
| (unsigned long long) b, |
| (unsigned long long) result); |
| exit(1); |
| } |
| } |
| |
| } |
| |
| return 0; |
| } |
