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From: Malcolm Beattie <mbeattie@clueful.co.uk>
Newsgroups: comp.arch
Subject: Re: Arm ldaxr / stxr loop question
Date: Mon, 11 Nov 2024 18:17:54 -0000 (UTC)
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On 2024-11-10, Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
> On Sun, 10 Nov 2024 01:26:22 +0000, MitchAlsup1 wrote:
>
>> It reads better without explanation ...
>
> Reminds me of the “EIEIO” instruction from IBM POWER (or was it only 
> PowerPC).
>
> Can anybody find any other example of any IBM engineer ever having a sense 
> of humour? Ever?

One of the resource types in JES2, the batch subsystem for z/OS, is
BERT ("Block Extension Reuse Table") and needs some sizing/tuning by
the sysprog. Not too noticeable as humourous but for low-level use
from Assembler some of the macros which manipulate them allow you to
(1) copy one into memory, i.e. "Deliver Or Get" a BERT
(2) define a hook to get control when a BERT is released, i.e
"Do It Later" for a BERT release.
(3) generate a control block for a related data area, i.e. a
"Collector Attribute Table" for BERTs.

These macros are
(1) $DOGBERT
(2) $DILBERT
(3) $CATBERT

--Malcolm