1#include<stdio.h>
2#include<assert.h>
3
4int main()
5{
6 int rt, rs, ach, acl, dsp;
7 int result;
8
9 rs = 0x03;
10 ach = 0x05;
11 acl = 0xB4CB;
12 result = 0x7FFFFFFF;
13 __asm
14 ("wrdsp %1, 0x01\n\t"
15 "mthi %3, $ac1\n\t"
16 "mtlo %4, $ac1\n\t"
17 "extrv_rs.w %0, $ac1, %2\n\t"
18 "rddsp %1\n\t"
19 : "=r"(rt), "+r"(dsp)
20 : "r"(rs), "r"(ach), "r"(acl)
21 );
22 dsp = (dsp >> 23) & 0x01;
23 assert(dsp == 1);
24 assert(result == rt);
25
26
27 dsp = 0;
28 __asm
29 ("wrdsp %0\n\t"
30 :
31 : "r"(dsp)
32 );
33
34 rs = 0x04;
35 ach = 0x01;
36 acl = 0xB4CB;
37 result = 0x10000B4D;
38 __asm
39 ("wrdsp %1, 0x01\n\t"
40 "mthi %3, $ac1\n\t"
41 "mtlo %4, $ac1\n\t"
42 "extrv_rs.w %0, $ac1, %2\n\t"
43 "rddsp %1\n\t"
44 : "=r"(rt), "+r"(dsp)
45 : "r"(rs), "r"(ach), "r"(acl)
46 );
47 dsp = (dsp >> 23) & 0x01;
48 assert(dsp == 0);
49 assert(result == rt);
50
51
52 dsp = 0;
53 __asm
54 ("wrdsp %0\n\t"
55 :
56 : "r"(dsp)
57 );
58
59 rs = 0x1F;
60 ach = 0x3fffffff;
61 acl = 0x2bcdef01;
62 result = 0x7ffffffe;
63 __asm
64 ("wrdsp %1, 0x01\n\t"
65 "mthi %3, $ac1\n\t"
66 "mtlo %4, $ac1\n\t"
67 "extrv_rs.w %0, $ac1, %2\n\t"
68 "rddsp %1\n\t"
69 : "=r"(rt), "+r"(dsp)
70 : "r"(rs), "r"(ach), "r"(acl)
71 );
72 dsp = (dsp >> 23) & 0x01;
73 assert(dsp == 0);
74 assert(result == rt);
75
76 return 0;
77}
78