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 #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 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
