--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rs, rt;
+ int result;
+
+ rs = 0x12345678;
+ rt = 0x87654321;
+ result = 0x87654321;
+ __asm
+ ("prepend %0, %1, 0x00\n\t"
+ : "+r"(rt)
+ : "r"(rs)
+ );
+ assert(rt == result);
+
+ rs = 0x12345678;
+ rt = 0x87654321;
+ result = 0xACF10ECA;
+ __asm
+ ("prepend %0, %1, 0x0F\n\t"
+ : "+r"(rt)
+ : "r"(rs)
+ );
+ assert(rt == result);
+
+ return 0;
+}