Or have a copy of the initialization values and MVCL that in?
On November 29, 2025 10:55:45 PM Kerry Liles
<[email protected]> wrote:
I might look at using binary counters instead of packed... Initialization
then is trivial; incrementing a counter might be ugly depending on how
large a binary counter you need (full word? double word?)
If you must use packed, how about mass smash to zero and then loop thru OI
or MVI rightmost byte of counters with X'0C'
All of this speculation assumes the counters can't just be assembled with
appropriate DC statements??
Kerry Liles
On Sat, Nov 29, 2025, 10:35 p.m. Brian Westerman <
[email protected]> wrote:
Hi,
I have a program in which I have 104 PL4 fields tht are used for various
counters, and when the program starts it spends a significant amount of
time initializing all of those fields to zero.
we used to use ZAP field,=PL4'0' and then I found an entry (on the web)
that said it would be "slightly" faster to use MVC, so I changed it to 104
MVC filed,=PL4'0'.
Is there not a quicker way to do this? I know that I can ripple the first
byte of a field for up to 256 bytes with a single instruction, but can that
same type of thing be done with a 4 byte packed field?
If not, is there a quicker way to initialize these fields without doing
each one separately?
Thanks for any tips.
Brian
