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test_dsp_r1_extpdp.c (1217B)

      1 #include<stdio.h>
      2 #include<assert.h>
      3 
      4 int main()
      5 {
      6     int rt, ach, acl, dsp, pos, efi;
      7     int result;
      8 
      9     ach = 0x05;
     10     acl = 0xB4CB;
     11     dsp = 0x07;
     12     result = 0x000C;
     13 
     14     __asm
     15         ("wrdsp %1, 0x01\n\t"
     16          "mthi %2, $ac1\n\t"
     17          "mtlo %3, $ac1\n\t"
     18          "extpdp %0, $ac1, 0x03\n\t"
     19          "rddsp %1\n\t"
     20          : "=r"(rt), "+r"(dsp)
     21          : "r"(ach), "r"(acl)
     22         );
     23     pos =  dsp & 0x3F;
     24     efi = (dsp >> 14) & 0x01;
     25     assert(pos == 3);
     26     assert(efi == 0);
     27     assert(result == rt);
     28 
     29     ach = 0x05;
     30     acl = 0xB4CB;
     31     dsp = 0x01;
     32 
     33     __asm
     34         ("wrdsp %1, 0x01\n\t"
     35          "mthi %2, $ac1\n\t"
     36          "mtlo %3, $ac1\n\t"
     37          "extpdp %0, $ac1, 0x03\n\t"
     38          "rddsp %1\n\t"
     39          : "=r"(rt), "+r"(dsp)
     40          : "r"(ach), "r"(acl)
     41         );
     42     efi = (dsp >> 14) & 0x01;
     43     assert(efi == 1);
     44 
     45 
     46     ach = 0;
     47     acl = 0;
     48     dsp = 0;
     49     result = 0;
     50 
     51     __asm
     52         ("wrdsp %1\n\t"
     53          "mthi %2, $ac1\n\t"
     54          "mtlo %3, $ac1\n\t"
     55          "extpdp %0, $ac1, 0x00\n\t"
     56          "rddsp %1\n\t"
     57          : "=r"(rt), "+r"(dsp)
     58          : "r"(ach), "r"(acl)
     59         );
     60     assert(dsp == 0x3F);
     61     assert(result == rt);
     62 
     63     return 0;
     64 }