--- /dev/null
+#include "io.h"
+
+int main(void)
+{
+ long long rd, rs, rt;
+ long long res;
+
+ rs = 0x1234567887654321;
+ rt = 0xabcdef9812345678;
+
+ res = 0x87654321abcdef98;
+
+ __asm
+ ("packrl.pw %0, %1, %2\n\t"
+ : "=r"(rd)
+ : "r"(rs), "r"(rt)
+ );
+ if (rd != res) {
+ printf("packrl.pw error\n");
+ return -1;
+ }
+
+ return 0;
+}