You are correct. You CAN get 64 bit functionality on a 32 bit machine. To do that, the GNU compilier uses long longs which are 64 bits. If all that is needed is 64 bit data, then use64bitint should be sufficient. Also, a re-compile would be necessary.

After the recompile, the quad packing will also be avaliable. A Quadword is just what is sounds like: four words. A long is two words, so a long long is four words which is equivalent to a quadword.