tests/tcg/mips/mips32-dsp/extpv.c

   1 #include<stdio.h>
   2 #include<assert.h>
   3
   4 int main()
   5 {
   6     int rt, ac, ach, acl, dsp;
   7     int result;
   8
   9     ach = 0x05;
  10     acl = 0xB4CB;
  11     dsp = 0x07;
  12     ac  = 0x03;
  13     result = 0x000C;
  14
  15     __asm
  16         ("wrdsp %1, 0x01\n\t"
  17          "mthi %2, $ac1\n\t"
  18          "mtlo %3, $ac1\n\t"
  19          "extpv %0, $ac1, %4\n\t"
  20          "rddsp %1\n\t"
  21          : "=r"(rt), "+r"(dsp)
  22          : "r"(ach), "r"(acl), "r"(ac)
  23         );
  24     dsp = (dsp >> 14) & 0x01;
  25     assert(dsp == 0);
  26     assert(result == rt);
  27
  28     ach = 0x05;
  29     acl = 0xB4CB;
  30     dsp = 0x01;
  31
  32     __asm
  33         ("wrdsp %1, 0x01\n\t"
  34          "mthi %2, $ac1\n\t"
  35          "mtlo %3, $ac1\n\t"
  36          "extpv %0, $ac1, %4\n\t"
  37          "rddsp %1\n\t"
  38          : "=r"(rt), "+r"(dsp)
  39          : "r"(ach), "r"(acl), "r"(ac)
  40         );
  41     dsp = (dsp >> 14) & 0x01;
  42     assert(dsp == 1);
  43
  44     return 0;
  45 }