75 lines
1.4 KiB
C
75 lines
1.4 KiB
C
#include<stdio.h>
|
|
#include<assert.h>
|
|
|
|
int main()
|
|
{
|
|
int rd, rs, rt, dsp;
|
|
int result, resultdsp;
|
|
|
|
rs = 0x12345678;
|
|
rt = 0x87654321;
|
|
result = 0x7FFFFFFF;
|
|
resultdsp = 0x01;
|
|
|
|
__asm
|
|
("wrdsp $0\n\t"
|
|
"subq_s.w %0, %2, %3\n\t"
|
|
"rddsp %1\n\t"
|
|
: "=r"(rd), "=r"(dsp)
|
|
: "r"(rs), "r"(rt)
|
|
);
|
|
dsp = (dsp >> 20) & 0x01;
|
|
assert(dsp == resultdsp);
|
|
assert(rd == result);
|
|
|
|
rs = 0x66666;
|
|
rt = 0x55555;
|
|
result = 0x11111;
|
|
resultdsp = 0x0;
|
|
|
|
__asm
|
|
("wrdsp $0\n\t"
|
|
"subq_s.w %0, %2, %3\n\t"
|
|
"rddsp %1\n\t"
|
|
: "=r"(rd), "=r"(dsp)
|
|
: "r"(rs), "r"(rt)
|
|
);
|
|
dsp = (dsp >> 20) & 0x01;
|
|
assert(dsp == resultdsp);
|
|
assert(rd == result);
|
|
|
|
rs = 0x0;
|
|
rt = 0x80000000;
|
|
result = 0x7FFFFFFF;
|
|
resultdsp = 0x01;
|
|
|
|
__asm
|
|
("wrdsp $0\n\t"
|
|
"subq_s.w %0, %2, %3\n\t"
|
|
"rddsp %1\n\t"
|
|
: "=r"(rd), "=r"(dsp)
|
|
: "r"(rs), "r"(rt)
|
|
);
|
|
dsp = (dsp >> 20) & 0x01;
|
|
assert(dsp == resultdsp);
|
|
assert(rd == result);
|
|
|
|
rs = 0x80000000;
|
|
rt = 0x80000000;
|
|
result = 0;
|
|
resultdsp = 0x00;
|
|
|
|
__asm
|
|
("wrdsp $0\n\t"
|
|
"subq_s.w %0, %2, %3\n\t"
|
|
"rddsp %1\n\t"
|
|
: "=r"(rd), "=r"(dsp)
|
|
: "r"(rs), "r"(rt)
|
|
);
|
|
dsp = (dsp >> 20) & 0x01;
|
|
assert(dsp == resultdsp);
|
|
assert(rd == result);
|
|
|
|
return 0;
|
|
}
|