This thread got me pondering about another peculiarity of EDIT AND MARK –
specifically under exactly what cases does GR1 not get updated.
I dusted off an old presentation that I had on the two instructions, added some
presenter notes (where the meat of the presentation really lives), and
Have you considered executing an EXECuted MVC of character zeroes over
the edited data? Or a CLI, MVI loop on the edited data?
On 2022-03-10 1:12 p.m., Steve Smith wrote:
There's really nothing that can beat trying it out.
Moving the Sig Start earlier is usually all you need; except it has
There's really nothing that can beat trying it out.
Moving the Sig Start earlier is usually all you need; except it has what I
consider to be the perverse effect of starting significance with the
following digit. Which makes it impossible to include the first leading
zero naturally (because SoS
ubject: Re: Edit Masks
"IBM Mainframe Assembler List" wrote on
03/10/2022 12:00:07 PM:
> Or move the significance starter earlier, I think. I would need to
> look up the details.
But if, as in the following case, the significance starter is
already the first of the 5
"IBM Mainframe Assembler List" wrote on
03/10/2022 12:00:07 PM:
> Or move the significance starter earlier, I think. I would need to
> look up the details.
But if, as in the following case, the significance starter is
already the first of the 5 digits then moving it any earlier would
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On
Behalf Of Hobart Spitz
Sent: Thursday, March 10, 2022 7:01 AM
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
Subject: Re: Edit Masks
That would work. However, unless you're planning to have decimal positions
later or chan
On Thu, 10 Mar 2022 09:01:21 -0600 Hobart Spitz wrote:
:>That would work. However, unless you're planning to have decimal positions
:>later or change between leading zeros and leading blanks, you can drop ED
:>and the mask and just use UNPK. Using ED in your case is just making more
:>work for
"IBM Mainframe Assembler List" wrote on
03/10/2022 10:01:21 AM:
> That would work. However, unless you're planning to have decimal
positions
> later or change between leading zeros and leading blanks, you can drop
ED
> and the mask and just use UNPK. Using ED in your case is just making
That would work. However, unless you're planning to have decimal positions
later or change between leading zeros and leading blanks, you can drop ED
and the mask and just use UNPK. Using ED in your case is just making more
work for yourself.
OREXXMan
Q: What do you call the residence of the
If I have a 3-byte packed decimal field (and let's say 0 decimals
for simplicity), I might normally go with the following edit mask if I
didn't want to retain leading zeros but leave one zero for a value of
zero.
x'40202020212060'
But if I wanted to retain leading zeros, would
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