none/tests/ppc64/power6_bcmp.c

   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, see <http://www.gnu.org/licenses/>.
  17
  18     The GNU General Public License is contained in the file COPYING.
  19 */
  20
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <strings.h>
  25
  26 #define CMPB(result,a,b) \
  27     asm ("cmpb %0, %1, %2\n" : "=r"(result) : "r"(a), "r"(b))
  28
  29
  30 int main(int argc, char *argv[])
  31 {
  32    int i, j, k;
  33    unsigned long mask;
  34    for (i = 1; i < 256; i++) {
  35       mask = 0;
  36       if (i & 1)
  37          mask += 0xff;
  38       if (i & 2)
  39          mask += 0xff00;
  40       if (i & 4)
  41          mask += 0xff0000;
  42       if (i & 8)
  43          mask += 0xff000000;
  44       if (i & 16)
  45          mask += 0xff00000000;
  46       if (i & 32)
  47          mask += 0xff0000000000;
  48       if (i & 64)
  49          mask += 0xff000000000000;
  50       if (i & 128)
  51          mask += 0xff00000000000000;
  52
  53       for (j = 0; j < 256; j++)
  54          for (k = 0; k < 256; k++)
  55             if (j != k) {
  56
  57                unsigned long a, b, result;
  58                a = (mask & (j * 0x101010101010101)) +
  59                    ((~mask) & (k * 0x101010101010101));
  60                b = j * 0x101010101010101;
  61                CMPB(result, a, b);
  62                if (result != mask) {
  63                   printf("%8lx %8lx %8lx %8lx\n", mask, a, b, result);
  64                   exit(1);
  65                }
  66             }
  67
  68    }
  69
  70    return 0;
  71 }