Bug#724320: gmp: x32: sizeof(mp_limb_t)!=sizeof(void*) is not supported by GAP and PARI

[Dilawar Singh]

Could something is done by using flags? For instance, if the detected
platform is the one which required 4 byte choice, then compile it with 4
byte.

--
Dilawar


On Sun, Sep 29, 2013 at 1:10 AM, Vincent Lefevre <vincent at vinc17.net> wrote:

> On 2013-09-28 10:38:24 -0500, Steve M. Robbins wrote:
> > Hi,
> >
> > On September 28, 2013 10:26:33 AM Vincent Lefevre wrote:
> > > On 2013-09-28 09:03:53 +0200, Marc Glisse wrote:
> >
> > > > the whole point of creating x32 was to benefit from the speed
> advantages
> > > > of amd64 without having a pointer size of 64 bits. Those speed
> advantages
> > > > include using more registers, but also using hardware 64 bit long
> long.
> > > > The speed difference between 32 and 64 bits [ ... ] so it doesn't
> make
> > > > sense to me to penalize x32
> > >
> > > I agree. PARI is not the only software that uses GMP.
> >
> > OK, so I may not have been completely clear, but what I was asking is
> which
> > makes most sense for Debian's GMP package: 8 bytes or 4 bytes.  I think
> what
> > Marc and Vincent are saying is that 8 bytes is the better choice.  Did I
> read
> > that correctly?
>
> Yes, I think that 8 bytes is the better choice if this leads to
> faster code and doesn't break other software than PARI.
>
> --
> Vincent Lefèvre <vincent at vinc17.net> - Web: <http://www.vinc17.net/>
> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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-- 
Dilawar
NCBS Bangalore