[Numpy-discussion] Importance of order when summing values in anarray

Charles R Harris charlesr.harris@gmail....
Tue Dec 9 21:01:49 CST 2008


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.

Chuck
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