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test_dsp_r1_extpdpv.c (919B)

      1 #include<stdio.h>
      2 #include<assert.h>
      3 
      4 int main()
      5 {
      6     int rt, rs, ach, acl, dsp, pos, efi;
      7     int result;
      8 
      9     ach = 0x05;
     10     acl = 0xB4CB;
     11     dsp = 0x07;
     12     rs  = 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          "extpdpv %0, $ac1, %4\n\t"
     20          "rddsp %1\n\t"
     21          : "=r"(rt), "+r"(dsp)
     22          : "r"(ach), "r"(acl), "r"(rs)
     23         );
     24     pos =  dsp & 0x3F;
     25     efi = (dsp >> 14) & 0x01;
     26     assert(pos == 3);
     27     assert(efi == 0);
     28     assert(result == rt);
     29 
     30     ach = 0x05;
     31     acl = 0xB4CB;
     32     dsp = 0x01;
     33 
     34     __asm
     35         ("wrdsp %1, 0x01\n\t"
     36          "mthi %2, $ac1\n\t"
     37          "mtlo %3, $ac1\n\t"
     38          "extpdpv %0, $ac1, %4\n\t"
     39          "rddsp %1\n\t"
     40          : "=r"(rt), "+r"(dsp)
     41          : "r"(ach), "r"(acl), "r"(rs)
     42         );
     43     efi = (dsp >> 14) & 0x01;
     44     assert(efi == 1);
     45 
     46     return 0;
     47 }