If we could just magically replace all the ALC code with
COBOL..... sigh.
If we could just magically replace all the ALC code with java.....
That is the nature of "modernization" of a mainframe.... One runs
into things done in ALC because it was the only way to solve the
issue, while getting the work done as quickly as possible. Why
else were all these programs written in ALC?
Ok, I have to get back to my Java class -- as in learning it, not
writing a Java class (oh can this get confusing...).
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Thank you all for your comments, the discussions, etc.
Steve Thompson
On 7/11/2024 12:40 AM, Tom Ross wrote:
I seem to remember something said about an extension to packed=20
decimal and new instructions. I've been looking at a recent=20
z/Arch PoOP in pdf (IBM web site), and I can't seem to find what=20
I hazily remember from a few years ago.=C2=A0 Perhaps it is in a=20
different publication.
.Could someone point me in the right direction, even if that is,=20
you must have been dreaming.
The issue is, how can COBOL handle larger packed decimal numbers=20
than PACK/UNPACK can handle?
I see this being a question that is going to get asked on a=20
project I'm on.... And I can see special macros having to be=20
developed for this....
The IBM z/OS COBOL compiler handled long numbers with packed-decimal
instructions for years by using library routines that would process
parts of the data nad then combine the results.
Modern COBOL compilers on modern hardware (IE: customers who have
z14 or later as DR machines) can compile with ARCH(12) which tells
the compiler that we can use Vedtor Packed Decimal instructions, that
can not only process many digits, but can process pacekd-decimal
arithmetic with up to 90% less CPU usage than traditional packed-
decimal instructions!
In any case, I think the answer is to use a newer COBOL compiler :-)
Cheers,
TomR >> COBOL is the Language of the Future! <<
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