[pypy-dev] PyPy 3 for Windows 64-bit systems - no download link available

[Janzert]

On 10/22/2018 17:13, Barry wrote:
> 
> 
>> On 21 Oct 2018, at 19:04, Armin Rigo <armin.rigo at gmail.com> wrote:
>>
>> Hi,
>>
>> On Sun, 21 Oct 2018 at 16:47, Barry Scott <barry at barrys-emacs.org> wrote:
>>>> On 19 Oct 2018, at 11:26, Armin Rigo <armin.rigo at gmail.com> wrote:
>>>> PyPy is not available for 64-bit Windows.
>>>
>>> How odd. sys.maxint on macOS and Fedora is (2**63)-1 not (2**31)-1.
>>
>> That's because MacOS and Fedora are not Windows.
> 
> Do you why windows is unique in this respect?
> 
> Barry
> 

 From what I understand the underlying cause is because 64bit windows 
(or more specifically the visual studio C compiler) uses an LLP64 
(IL32P64) data model* while most 64bit unix based systems use LP64 
(I32LP64).

The previously linked article on getting a 64bit windows pypy talks 
about the size difference for long but doesn't spell out the data model 
explicitly.

Hopefully that helps clear up where the underlying issue comes from.

Brian Haskin

* https://en.wikipedia.org/wiki/64-bit_computing#64-bit_data_models