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August 04, 2009
Re: reddit.com: first Chapter of TDPL available for free
Andrei Alexandrescu Wrote:

> KennyTM~ wrote:
> > Andrei Alexandrescu wrote:
> >> http://www.reddit.com/r/programming/comments/975ng/diving_into_the_d_programming_language_tdpl/ 
> >>
> >>
> >> (Don't tell anyone, but I plan to rewrite it.)
> >>
> >> Andrei
> > 
> > What's a "so-called IEEE 754 double-extended 79-bit format"? :p
> 
> Heck, I didn't know until I googled for it!
> 
> BTW folks, please please vote the reddit link up. It's a simple and 
> effective way to increase exposure to D and grow the community.
> 
> http://www.reddit.com/r/programming/comments/975ng/diving_into_the_d_programming_language_tdpl/
> 
> 
> Andrei

And I always thought it was double-extended 80-bit. The IEEE standard actually specifies >= 79 bits and Intel implements it as 80bits.

Well you learn something new everyday!
August 04, 2009
Re: reddit.com: first Chapter of TDPL available for free
Jeremie Pelletier:
>And I always thought it was double-extended 80-bit. The IEEE standard actually specifies >= 79 bits and Intel implements it as 80bits.<

But it seems there are weird differences across operating systems regarding how much memory is allocated to represent such numbers, like 10, 12, 16 bytes on Windows, Linux, Mac (this comes from something Walter said when he has adapted DMD to the other OSs). Do you know why they have chosen different solutions regarding something so basic? (I don't even want to talk about the stupid endianess of CPUs).

Bye,
bearophile
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