Re: purpose of Z-ADD?

[Dennis <iseries@xxxxxxxxxxxx>]

Vern, I seem to remember coding Z-ADD on my System/3 coding forms.

I think it was not part of RPG (1), but I am fairly certain it was part of RPG/II from the beginning.

"Vern Hamberg" <vhamberg@xxxxxxxxxxx> wrote:

> Buzz
>
> EVAL is a late addition to RPG - it was never a part of RPG III. It was
>
> added as an op-code that let you put free-form expressions in an 
> expanded factor 2. EVALR came a little later, to provide what MOVE used
>
> to do, vs. MOVEL.
>
> So we used to have to use Z-ADD to set a variable to a value.
>
> HTH
> Vern
>
> On 3/24/2011 11:09 AM, Buzz Fenner wrote:
> > Since it was mentioned here and tickled a neuron...I might as well
> ask:
> > I've always wondered, what is the purpose of Z-ADD?  Isn't it just
> the
> > same to EVAL = 0, or EVAL = whatever you really want it to be?  Or is
> > this just a legacy leftover that only still exists in order to mess
> with
> > my mind?
> >
> > Thanks!  :)
> >
> > Luke,
> >
> > In case it hasn't been mentioned (or it has and I missed it), when
> pumping
> > numeric values from one variable to another -of a larger length than
> the
> > originating variable- if it wasn't 'initialized' via z-add0 prior to
> the
> > MOVE it resulted in an execution error with invalid data in a numeric
> field.
> > Ah, the bad old days...
> >
> > Buzz
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