Python on 64 bit/IA-64 ...

[Bjorn Pettersen]

I'm assuming Python will run more or less out of the box on ia64 *nix
systems, Win64 might be more of a challenge though... (anyone have a native
compiler yet :-)  As long as you remember that long long is spelled __int64
you should be well on your way.  The MS compiler is relatively good and much
faster than the Intel elc compiler (and we've seen occational problems with
complicated c++ code with the Intel compiler -- not something that should
affect Python though...)

Since we've had to work in a cross compilation environment, I've personally
only used Python on the 32 bit client -- occationally having Python write
bat scripts that are run on the win64 machine... (it also seems to help
stability -- kind of interesting though when win is more stable than *nix on
a platform <wink>)

-- bjorn

Shiv Shankar Ramakrishnan wrote:

> Hi,
> Has there been any work done to make Python take advantage of a full 64
> bit environment? More specifically is anyone working on an Intel IA-64
> port of Python?
>
> In particular if one were to change the sources for this then which data
> model would one follow - LP64 or LLP64 (P64)? Which model have people
> used for existing 64 bit platforms if they did a port?
>
> AFAIK Python Int is now mapped to a 32 bit int and Long is unlimited
> precision (emulation). Floating points are m/c dependent but mostly
> doubles.
>
> So this is what I think might be good for IA-64 -
>
> Pointers        - All 64 bit.
> Int             - 64 bit.
> Long            - As it is now.
> Floating Point  - double (As now) or should it be long double?
>
> Making floating points long double will get better precision but then
> the results might differ from the double based ones.
>
> Any comments? Also any general advice on doing a 64 bit port of Python.
> Things to watch out for? Pitfalls etc ...
>
> Please note that I am not making any promises about an IA-64 port as
> of now :-)
>
> Thanks,
> Shiv
>
> P.S. If you something significant to say please cc a copy to me by
> E-mail also.
>
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