Re: ver 1.9.4 use more decimal digits

[John Machin <sjmachin lexicon net>]

On 2/03/2009 3:57 PM, bill lam wrote:
> On Mon, 02 Mar 2009, John Machin wrote:
> > The question is: What is the smallest integer N such that, for each  
> > possible IEEE 754 64-bit number, when you round it to N decimal digits  
> > of precision for storage/transmission purposes and then convert it back  
> > to the IEEE form, you get the original number?
> >
> > The answer is: 17
>
> Thanks John. That make sense. 
>
> BTW there is a compilation option in gnumeric "with-long-double". I'm
> not sure if that use 10 byte storage or otherwise. Does it require more
> than 17 digit storage format, or more importantly, compromise the
> validity of numerical computation that tested for 8-byte double?

Sorry, I don't know what "with-long-double" does -- I'm just an 
interested onlooker, not a dev :-)