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#include<stdio.h>
#include<assert.h>
int main()
{
int rt, ach, acl, dsp;
int result;
ach = 0x05;
acl = 0xB4CB;
result = 0x00007FFF;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_s.h %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);
ach = 0xffffffff;
acl = 0x12344321;
result = 0xFFFF8000;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_s.h %0, $ac1, 0x08\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 dsp */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0x00;
acl = 0x4321;
result = 0x432;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_s.h %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 dsp */
dsp = 0;
__asm
("wrdsp %0\n\t"
:
: "r"(dsp)
);
ach = 0x123;
acl = 0x87654321;
result = 0x1238;
__asm
("mthi %2, $ac1\n\t"
"mtlo %3, $ac1\n\t"
"extr_s.h %0, $ac1, 28\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;
}
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