qemu

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test_dsp_r1_extpv.c (860B)

      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 }