On Jun 9, 2022, at 09:11:44, Ed Jaffe wrote:
... Reverse-sequence tables are counterintuitive; harder to understand
and debug, but their use has always been worthwhile in light of the
performance gains.
You needn't keep the table in reverse sequence; merely keep the unused
space at the
Ed,
>> it will be fun to be able to use it someday (if I live that long...)
I thought the very same - but it is easier for me-
It is an excellent instruction when you need to extent an object (of a
PDF-file) in the middle. Had to use a work-area with a length of the
rest of the object-
On 6/8/2022 6:06 AM, Jonathan Scott wrote:
Please note that there is already an instruction with the
mnemonic MVCRL, "Move right to left", used to shift up data to
make a gap for inserting new data.
Destructive overlap is often quite useful (for clearing fields, etc),
but it's a PITA when you
Also, CLCL and MVCL are interruptable and resumeable; an interrupt leaves the
registers updated for resumption.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Assembler List [ASSEMBLER-LIST@LISTSERV.UGA.EDU] on behalf
of
Why isn't there a Move Relative Long instruction
The answer is likely because there is insufficient reason to have one, to
justify the cost.
Instructions are typically created when they solve a problem and, often, when
they can be done faster if implemented in the machine than if done piece
