1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
#include<stdio.h>
#include<assert.h>
int main()
{
int rt, ach, acl, dsp;
int result;
ach = 0x05;
acl = 0xB4CB;
result = 0x7FFFFFFF;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_rs.w %0, $ac1, 0x03\n\t"
"rddsp %1\n\t"
: "=r"(rt), "=r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 1);
assert(result == rt);
/* Clear dspcontrol */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0x01;
acl = 0xB4CB;
result = 0x10000B4D;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_rs.w %0, $ac1, 0x04\n\t"
"rddsp %1\n\t"
: "=r"(rt), "=r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 0);
assert(result == rt);
/* Clear dspcontrol */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0x3fffffff;
acl = 0x2bcdef01;
result = 0x7ffffffe;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_rs.w %0, $ac1, 0x1F\n\t"
"rddsp %1\n\t"
: "=r"(rt), "=r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 0);
assert(result == rt);
/* Clear dspcontrol */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0x80000000;
acl = 0x00000000;
result = 0x80000000;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_rs.w %0, $ac1, 0x1F\n\t"
"rddsp %1\n\t"
: "=r"(rt), "=r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 1);
assert(result == rt);
/* Clear dspcontrol */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0xFFFFFFFF;
acl = 0xFFFFFFFF;
result = 0;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_rs.w %0, $ac1, 0x1F\n\t"
"rddsp %1\n\t"
: "=r"(rt), "=r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 0);
assert(result == rt);
return 0;
}
|
