Re: %DECPOS doesn't work with %DEC

http://www.bartleby.com/61/71/P0027100.html


-------------------------
 Bryan Dietz

rpg400-l-bounces@xxxxxxxxxxxx wrote on 10/29/2003 05:20:11 PM:

> What does "palliate" mean?
>
>
> Shannon O'Donnell
>
>
> ----- Original Message -----
> From: "Buck" <buck.calabro@xxxxxxxxxxxx>
> To: <rpg400-l@xxxxxxxxxxxx>
> Sent: Wednesday, October 29, 2003 4:12 PM
> Subject: %DECPOS doesn't work with %DEC
>
>
> > I am preparing a class on RPG IV for internal use, and was tinkering
with
> > the examples in the RPG Reference regarding intermediate precision.
> > Straight from the reference, I have this:
> >
> > d fld1            s             15p 4
> > d fld2            s             15p 2 inz(4)
> > d fld3            s              5p 2 inz(100)
> > d fld4            s              9p 4 inz(1)
> > d fld5            s              9p 4 inz(2)
> >
> > eval      fld1=fld2/(((fld3/100)*fld4)+fld5)
> >
> > Of course, it returns 1.0000, exactly as expected.  In an attempt to
> > demonstrate (again, from the manual) that %DEC can be used to palliate
> this,
> > I tried:
> >
> > eval
> >
> >             fld2/(((fld3/100)*fld4)+fld5):
> >             %size(fld1):
> >             %decpos(fld1))
> >
> > *RNF0329 30 The third parameter for %DEC or %DECH is not valid.
> >
> > Ah, well.  That's too bad, because it would open a programmatic way to
> > influence the intermediate calculations in the same way that
re-ordering
> > Traditional Operation Codes did - in essence, twisting the compiler's
arm
> to
> > use the intermediate results that *I* want.  As it stands, I need to do
> > this:
> >
> > eval
> >
> >             fld2/(((fld3/100)*fld4)+fld5):
> >             %size(fld1):
> >             4)
> >
> > Just an observation for anyone interested in intermediate precision,
and
> > detecting its results programmatically.
> >   --buck