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 = 0x77777777;
10     rt = 0x67654321;
11     result    = 0x10123456;
12     resultdsp = 0x0;
13 
14     __asm
15         ("subq.ph %0, %2, %3\n\t"
16          "rddsp %1\n\t"
17          : "=r"(rd), "=r"(dsp)
18          : "r"(rs), "r"(rt)
19         );
20     dsp = (dsp >> 20) & 0x01;
21     assert(dsp == resultdsp);
22     assert(rd  == result);
23 
24     rs = 0x12345678;
25     rt = 0x87654321;
26     result    = 0x8ACF1357;
27     resultdsp = 0x01;
28 
29     __asm
30         ("subq.ph %0, %2, %3\n\t"
31          "rddsp %1\n\t"
32          : "=r"(rd), "=r"(dsp)
33          : "r"(rs), "r"(rt)
34         );
35     dsp = (dsp >> 20) & 0x01;
36     assert(dsp == resultdsp);
37     assert(rd  == result);
38 
39     return 0;
40 }
41