Division issue with 3.8.2 on AIX 7.1

[Sherry L. West]

I need off this list please. I don’t even have this.

On Wed, Jun 3, 2020 at 11:30 PM Albert Chin <
python-list at mlists.thewrittenword.com> wrote:

> On Wed, Jun 03, 2020 at 08:11:17PM -0400, Dennis Lee Bieber wrote:
> > On Tue, 2 Jun 2020 12:26:16 -0500, Albert Chin
> > <python-list at mlists.thewrittenword.com> declaimed the following:
> >
> > >I've built Python 3.8.2 on AIX 5.2, 5.3, 6.1, and 7.1. I am seeing
> > >different results for the following Python program:
> > >  $ python3 -c "eps = 2.0 ** -53.0; tiny = 2.0 ** -1022.0; \
> > >print ((1.0 - eps) / tiny * 4.0)"
> > >
> > >I get the correct result, 1.7976931348623157e+308, on AIX 5.2, 5.3,
> > >and 6.1. But, on 7.1, I get "inf".
> > >
> > >Anyone know where can I look in the Python source code to investigate
> > >this?
> >
> > Have you considered that it might be something in an underlying C
> > library (especially for the double-precision exponentiation)?
>
> On Wed, Jun 03, 2020 at 08:44:47PM -0700, Miki Tebeka wrote:
> > > Anyone know where can I look in the Python source code to investigate
> > > this?
> >
> > Probably around
> > https://github.com/python/cpython/blob/master/Objects/floatobject.c
>
> Thanks to both of you. I applied some updated OS patches and the
> problem went away.
>
> --
> albert chin (china at thewrittenword.com)
> --
> https://mail.python.org/mailman/listinfo/python-list
>
-- 

Mrs. Sherry West
Owens Cross Roads Elementary