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

   1#include<stdio.h>
   2#include<assert.h>
   3
   4int 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}
  46