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

   1 #include<stdio.h>
   2 #include<assert.h>
   3
   4 int main()
   5 {
   6     int rt, ach, acl, dsp;
   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          "extp %0, $ac1, 0x03\n\t"
  19          "rddsp %1\n\t"
  20          : "=r"(rt), "+r"(dsp)
  21          : "r"(ach), "r"(acl)
  22         );
  23     dsp = (dsp >> 14) & 0x01;
  24     assert(dsp == 0);
  25     assert(result == rt);
  26
  27     ach = 0x05;
  28     acl = 0xB4CB;
  29     dsp = 0x01;
  30
  31     __asm
  32         ("wrdsp %1, 0x01\n\t"
  33          "mthi %2, $ac1\n\t"
  34          "mtlo %3, $ac1\n\t"
  35          "extp %0, $ac1, 0x03\n\t"
  36          "rddsp %1\n\t"
  37          : "=r"(rt), "+r"(dsp)
  38          : "r"(ach), "r"(acl)
  39         );
  40     dsp = (dsp >> 14) & 0x01;
  41     assert(dsp == 1);
  42
  43     ach = 0;
  44     acl = 0x80000001;
  45     dsp = 0x1F;
  46     result = 0x80000001;
  47
  48     __asm
  49         ("wrdsp %1\n\t"
  50          "mthi %2, $ac2\n\t"
  51          "mtlo %3, $ac2\n\t"
  52          "extp %0, $ac2, 0x1F\n\t"
  53          "rddsp %1\n\t"
  54          : "=r"(rt), "+r"(dsp)
  55          : "r"(ach), "r"(acl)
  56         );
  57     dsp = (dsp >> 14) & 0x01;
  58     assert(dsp == 0);
  59     assert(result == rt);
  60
  61     return 0;
  62 }