Re: Shifting memory to the right

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#196

From: David P. de Jongh
Date: Wed, 12 Oct 2005 03:38

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You can use TRTR for this function if you have a late-model machine.
In any event, have you tried benchmarking this against a BCTR loop?
D de J

-----Original Message-----
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU]
On Behalf Of Robert A. Rosenberg
Sent: Monday, October 10, 2005 10:35 PM
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
Subject: Re: Shifting memory to the right

At 08:31 -0500 on 10/10/2005, David P. de Jongh wrote about Re:
Shifting memory to the right:

>MVCIN (a) is no longer supported and (b) moved data in reverse order, so
>C'ABCDE' would be moved as C'EDCBA'.  Very useful if you put a card in the
>reader backwards, I'm sure, but I for one could never think of a real use
>for it.

As to usage, I use it all the time when I want to locate the last
non-blank in a record. Just do a MVCIN to a workarea and then use a
TRT to find the first non-blank. The offset from the end of the
workarea is the offset in the original record.

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From: "David P. de Jongh" <daviddejongh@worldnet.att.net>
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Subject: Re: Shifting memory to the right
Date: Tue, 11 Oct 2005 22:38:40 -0500
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