Re: Odd/Even packed numbers.

 Leif, would you try one more thing since you are already there, please?
What happens if you define it as 14S 0 and 15S 0?  Does packed vs. signed
make a difference?

And thank you for doing that test.  I've wondered the same thing for a long
time now.


---------------------------------------------------------
Booth Martin   http://www.MartinVT.com
Booth@MartinVT.com
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-------Original Message-------

From: midrange-l@midrange.com
Date: Thursday, November 28, 2002 12:08:15 PM
To: midrange-l@midrange.com
Subject: Re: Odd/Even packed numbers.

> Leif,

> apart from rough testing . . . I don't have rights to use sst and not even

> enough knowledge about RISC instructions, but maybe it could be
interesting
> to compare how both versions are compiled to see if there are some machine

> instruction added to fix the missing semi-byte.

>


no need for SST, a simple RPG program or MI program or COBOL
program will do. Since I said that it was trivial, I just wrote one
and added packed 123 up 100,000,000 times.
With PKD(14,0) it took 33.0 seconds (on my slow S20)
With PKD(15,0) it took 29.3 seconds,
so, yes, it is still true. there is a 10% difference. Or 3.7 seconds
for one hundred million additions. You must evaluate if that
difference is a show stopper for your application (it wouldn't be
it for mine).