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#include<stdio.h>
#include<assert.h>
int main()
{
int rt, rs, ach, acl, dsp;
int result;
ach = 0x05;
acl = 0xB4CB;
dsp = 0x07;
rs = 0x03;
result = 0x00007FFF;
__asm
("wrdsp %1, 0x01\n\t"
"mthi %3, $ac1\n\t"
"mtlo %4, $ac1\n\t"
"extrv_s.h %0, $ac1, %2\n\t"
"rddsp %1\n\t"
: "=r"(rt), "+r"(dsp)
: "r"(rs), "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 1);
assert(result == rt);
rs = 0x08;
ach = 0xffffffff;
acl = 0x12344321;
result = 0xFFFF8000;
__asm
("wrdsp %1, 0x01\n\t"
"mthi %3, $ac1\n\t"
"mtlo %4, $ac1\n\t"
"extrv_s.h %0, $ac1, %2\n\t"
"rddsp %1\n\t"
: "=r"(rt), "+r"(dsp)
: "r"(rs), "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)
);
rs = 0x04;
ach = 0x00;
acl = 0x4321;
result = 0x432;
__asm
("wrdsp %1, 0x01\n\t"
"mthi %3, $ac1\n\t"
"mtlo %4, $ac1\n\t"
"extrv_s.h %0, $ac1, %2\n\t"
"rddsp %1\n\t"
: "=r"(rt), "+r"(dsp)
: "r"(rs), "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 0);
assert(result == rt);
rs = 0x1C;
ach = 0x123;
acl = 0x87654321;
result = 0x1238;
__asm
("wrdsp %1, 0x01\n\t"
"mthi %3, $ac1\n\t"
"mtlo %4, $ac1\n\t"
"extrv_s.h %0, $ac1, %2\n\t"
"rddsp %1\n\t"
: "=r"(rt), "+r"(dsp)
: "r"(rs), "r"(ach), "r"(acl)
);
dsp = (dsp >> 23) & 0x01;
assert(dsp == 0);
assert(result == rt);
return 0;
}
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