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
|
#include<stdio.h>
#include<assert.h>
int main()
{
int rt, ach, acl, dsp;
int result;
ach = 0x05;
acl = 0xB4CB;
result = 0xA0001699;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr.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 = 0x10000B4C;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr.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);
return 0;
}
|