Block concurrent rules for newer instructions

It's been more than a decade since there was hot discussion here on
proper implementation of block concurrent storage references in
Hercules. Since then two new kinds of instructions relevant to this
issue have come along: some that have quadword block-concurrency (e.g.
LPQ, CDSG), and some that deal atomically with disjoint operands
(LPD[G]). LPD[G] is interesting and I think unique in that it
indicates via the CC whether the operation took place with an
interlocked fetch or not, so a valid implementation can simply always
set the CC to show that it didn't. I suppose a performance gain can be
had by doing this only in a multi-host-CPU environment.

Anyway, what is the status of these newer instructions in Hercules?

Tony H.