https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66797
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> --- HPPA 1.0 and 1.1 only support a 5 bit offset in REG+D addressing modes for floating point loads/stores. So, yes, it's quite limited. For HPPA 2.0 and beyond a 14 bit offset is supported.
