@Inline
 private static void copy8Bytes(Address dstPtr, Address srcPtr) {
   if (BYTES_IN_COPY == 8) {
     if (VM.BuildForIA32) {
       dstPtr.store(srcPtr.loadLong());
     } else {
       dstPtr.store(srcPtr.loadDouble());
     }
   } else {
     copy4Bytes(dstPtr, srcPtr);
     copy4Bytes(dstPtr.plus(4), srcPtr.plus(4));
   }
 }