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

   1 #include<stdio.h>
   2 #include<assert.h>
   3
   4 int main()
   5 {
   6     int rd, rs, rt, dsp;
   7     int result, resultdsp;
   8
   9     rs = 0x12345678;
  10     rt = 0x87654321;
  11     result    = 0x7FFFFFFF;
  12     resultdsp = 0x01;
  13
  14     __asm
  15         ("wrdsp $0\n\t"
  16          "subq_s.w %0, %2, %3\n\t"
  17          "rddsp %1\n\t"
  18          : "=r"(rd), "=r"(dsp)
  19          : "r"(rs), "r"(rt)
  20         );
  21     dsp = (dsp >> 20) & 0x01;
  22     assert(dsp == resultdsp);
  23     assert(rd  == result);
  24
  25     rs = 0x66666;
  26     rt = 0x55555;
  27     result    = 0x11111;
  28     resultdsp = 0x0;
  29
  30     __asm
  31         ("wrdsp $0\n\t"
  32          "subq_s.w %0, %2, %3\n\t"
  33          "rddsp %1\n\t"
  34          : "=r"(rd), "=r"(dsp)
  35          : "r"(rs), "r"(rt)
  36         );
  37     dsp = (dsp >> 20) & 0x01;
  38     assert(dsp == resultdsp);
  39     assert(rd  == result);
  40
  41     rs = 0x0;
  42     rt = 0x80000000;
  43     result    = 0x7FFFFFFF;
  44     resultdsp = 0x01;
  45
  46     __asm
  47         ("wrdsp $0\n\t"
  48          "subq_s.w %0, %2, %3\n\t"
  49          "rddsp %1\n\t"
  50          : "=r"(rd), "=r"(dsp)
  51          : "r"(rs), "r"(rt)
  52         );
  53     dsp = (dsp >> 20) & 0x01;
  54     assert(dsp == resultdsp);
  55     assert(rd  == result);
  56
  57     rs = 0x80000000;
  58     rt = 0x80000000;
  59     result    = 0;
  60     resultdsp = 0x00;
  61
  62     __asm
  63         ("wrdsp $0\n\t"
  64          "subq_s.w %0, %2, %3\n\t"
  65          "rddsp %1\n\t"
  66          : "=r"(rd), "=r"(dsp)
  67          : "r"(rs), "r"(rt)
  68         );
  69     dsp = (dsp >> 20) & 0x01;
  70     assert(dsp == resultdsp);
  71     assert(rd  == result);
  72
  73     return 0;
  74 }