The alignment requirements of some data types are different
on the HP 9000 workstations and servers. Check any externally imposed
data structure layouts for differences. These may include byte and
bit-field order, if you are migrating from a VAX, or different internal
padding for structure member alignment. On the HP 9000 workstations
and servers, doubles
must be aligned on a 64-bit boundary, whereas other machines require
alignment on a 32-bit boundary. Refer to Chapter 2 for complete
storage and alignment information.