On my two systems with Intel Core2 DUO, finfo(float128) gives me the nameerro, "NameError: name 'float128' is not defined". Why?
 
Thanks
 
Frank

> Date: Tue, 9 Dec 2008 21:10:32 -0600
> From: robert.kern@gmail.com
> To: numpy-discussion@scipy.org
> Subject: Re: [Numpy-discussion] Importance of order when summing values in anarray
>
> On Tue, Dec 9, 2008 at 21:01, Charles R Harris
> <charlesr.harris@gmail.com> wrote:
> >
> >
> > On Tue, Dec 9, 2008 at 1:40 PM, Robert Kern <robert.kern@gmail.com> wrote:
> >>
> >> On Tue, Dec 9, 2008 at 09:51, Nadav Horesh <nadavh@visionsense.com> wrote:
> >> > As much as I know float128 are in fact 80 bits (64 mantissa + 16
> >> > exponent) so the precision is 18-19 digits (not 34)
> >>
> >> float128 should be 128 bits wide. If it's not on your platform, please
> >> let us know as that is a bug in your build.
> >
> > I think he means the actual precision is the ieee extended precision, the
> > number just happens to be stored into larger chunks of memory for alignment
> > purposes.
>
> Ah, that's good to know. Yes, float128 on my Intel Mac behaves this way.
>
> In [12]: f = finfo(float128)
>
> In [13]: f.nmant
> Out[13]: 63
>
> In [14]: f.nexp
> Out[14]: 15
>
> --
> Robert Kern
>
> "I have come to believe that the whole world is an enigma, a harmless
> enigma that is made terrible by our own mad attempt to interpret it as
> though it had an underlying truth."
> -- Umberto Eco
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