Operations may return PlusSignalingNaN or PlusQuietNaN
When running on HP-UX, mathematical operations that return NaNs may
return different flavors, depending on the specific OS version and
chipset. For example,
(5.0 / 0) * 0 * 1
may return PlusSignalingNaN or PlusQuietNaN
These return values are provided by the operating system, outside of GemStone's control. Ensure your application can handle the OS results, and verify before moving to new OS systems or versions.