>What is the recommended practice for what
>registers to specify?
Surely there is no "recommended" practice. You use whatever you feel like
that meets your needs. If something is not allowed, that is what the PoOp
would explain. And possibly would also explain things that might not work
under
regs from working storage.
Rob
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Charles Mills
Sent: Tuesday, October 10, 2017 7:06 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: PLO register specifications?
The syntax of PLO is of course PLO
The syntax of PLO is of course PLO R1,D2(B2),R3,D4(B4).
For many of the operation codes (5, e.g.) R1 and R3 (in the syntax, not GPRs
1 and 3) are unused. What is the recommended practice for what registers to
specify? It seems odd to me that the PoOp is silent. GPR 0 would be the
obvious choice, b
