--- /dev/null
+#include "io.h"
+
+int main(void)
+{
+ long long rd, rs, rt, result, dspreg, dspresult;
+ rt = 0x9FFFFFFD9FFFFFFD;
+ rs = 0x4000000080000000;
+ result = 0x7fffffffe0000003;
+ dspresult = 0x1;
+
+ __asm
+ ("subq_s.pw %0, %2, %3\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dspreg)
+ : "r"(rs), "r"(rt)
+ );
+ dspreg = (dspreg >> 20) & 0x1;
+ if ((rd != result) || (dspreg != dspresult)) {
+ printf("subq_s.pw error1\n");
+
+ return -1;
+ }
+
+ rt = 0x123456789ABCDEF1;
+ rs = 0x123456789ABCDEF2;
+ result = 0x0000000000000001;
+ /* This time we do not set dspctrl, but it setted in pre-action. */
+ dspresult = 0x1;
+
+ __asm
+ ("subq_s.pw %0, %2, %3\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dspreg)
+ : "r"(rs), "r"(rt)
+ );
+ dspreg = (dspreg >> 20) & 0x1;
+ if ((rd != result) || (dspreg != dspresult)) {
+ printf("subq_s.pw error2\n");
+
+ return -1;
+ }
+
+ rt = 0x8000000080000000;
+ rs = 0x7000000070000000;
+ dspresult = 0x1;
+
+ __asm
+ ("subq_s.pw %0, %2, %3\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dspreg)
+ : "r"(rs), "r"(rt)
+ );
+
+ dspreg = (dspreg >> 20) & 0x1;
+ if ((dspreg != dspresult)) {
+ printf("subq_s.pw error3\n");
+
+ return -1;
+ }
+
+ return 0;
+}
+