--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rs, rt, ach, acl;
+ int result, resulth, resultl;
+
+ rs = 0x00FFBBAA;
+ rt = 0x4B231000;
+ resulth = 0x4b0f01;
+ resultl = 0x71f8a000;
+ __asm
+ ("multu $ac1, %2, %3\n\t"
+ "mfhi %0, $ac1\n\t"
+ "mflo %1, $ac1\n\t"
+ : "=r"(ach), "=r"(acl)
+ : "r"(rs), "r"(rt)
+ );
+ assert(ach == resulth);
+ assert(acl == resultl);
+
+ return 0;
+}