LXR qemu/tests/tcg/mips/mips32-dsp/subq_s

   1#include<stdio.h>
   2#include<assert.h>
   3
   4int 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}
  75