RE: Questions about DS arrays

["Bob Cozzi" <cozzi@xxxxxxxxx>]

Ah, maybe someday I'll be on V5R2 and will have that PTF available...

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Barbara Morris
Sent: Wednesday, December 08, 2004 4:09 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Questions about DS arrays

Bob Cozzi wrote:
> ...
> A faster way might be to create a second data structure and simply move it
> into the one being cleared. If I remember right, CLEAR moves *BLANKS and
> *ZEROS (metaphorically speaking) into each subfield individually. Hence
the
> lengthy CLEAR time.
> 

The compiler doesn't clear the subfields individually.  It creates the
clear value for the whole DS at compile time and handles the whole DS
(or each element of the DS array) in one instruction, not subfield by
subfield.

The /free version of CLEAR didn't do this until the fix for APAR
SE14962.

V5R2M0   : SI13771
V5R3M0   : SI15216 

I don't think you could beat the compiler's CLEAR with a hand-coded
version.

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