On Fri, May 16, 2014 at 10:20 AM, Esteban Lorenzano <estebanlm@gmail.com> wrote:

On 15 May 2014, at 18:46, Hilaire Fernandes <hilaire.fernandes@gmail.com> wrote:

> Great.
>
> As we are discussing about build, is it possible to compile CogVM on 64
> bits architecture as it is already the case for the interpreted SqueakVM
> (https://packages.debian.org/sid/squeak-vm)?

I do not understand. To compile a regular vm in a 64bits platform is trivial. You just need to have the 32bits library installed.
But to have a 64bits vm that runs on 64bits� that�s another very different history:

- you need a 64bits image (so trace, export, etc.)

ImageTracers are intriguing to me :-) Is this in some way relatable to Oz? What's that project doing now? It was very interesting/useful. Guille?

 

- you need to be 64bits word size aware (not so complicated, but a lot of work).
- you need 64bits plugins (a lot of them)
- you need 64bits JIT (or no JIT at all)

And...

* 64-bit aware hashing functions as the current ones are 32-bit centric. So, not so trivial I'd say. (what's the plan?)

* special care of the Float which will be directly in a 64 bit "oop" - I guess we'll face some fun here. Especially with the float plugin. 

As a side note, I see that http://www.mpfr.org/ is supported by INRIA. WTF aren't we considering this ? LGPL and INRIA may help getting some special thing for Pharo.

Phil

 

Some time ago there was an experimental 64bits interpreter vm (not even stack). Who worked with a special traced image.
What squeak guys are doing in the link you provide is still building a 32bits vm.

Now. In the agenda for this year is to work on a 64bits spur version. If everything is fine and the stars align properly, it will be ready around christmas.

Esteban


>
> Hilaire
>
> Le 15/05/2014 18:24, Esteban Lorenzano a �crit :
>> so yes� I integrated the fix, created a pull request, waited until validation� and then I forget to merge :S
>> it should be in process to build now.
>
> --
> Dr. Geo http://drgeo.eu
>
>