1 /* Copyright (C) 2007 IBM 2 3 Author: Pete Eberlein eberlein (at) 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 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
