I think I remember reading that zSeries has Decimal Floating Point, too, and that IBM's JVM does take advantage of the instructions on z/OS. Of course, even if

I think I remember reading that zSeries has Decimal Floating Point, too, and that IBM's JVM does take advantage of the instructions on z/OS. Of course, even if that is true, it is a different architecture. But still, if they made the change on one architecture, it would be silly not to make it on the other one as well. Unless that was intentional to keep some sort of advantage for zSeries.