The X86 memory model is "conservative" in the sense that it puts strong restrictions on the order of observed loads and stores between cores. Azul and IA64 did

The X86 memory model is "conservative" in the sense that it puts strong restrictions on the order of observed loads and stores between cores. Azul and IA64 did not. Hence "sloppy" code - but technically correct (at least it would compile) might run on an X86 and break on the IA64. Cliff