Bug#724320: gmp: x32: sizeof(mp_limb_t)!=sizeof(void*) is not supported by GAP and PARI
Bill.Allombert at math.u-bordeaux1.fr
Mon Sep 30 20:13:34 CEST 2013
On Mon, Sep 30, 2013 at 05:47:07PM +0200, Bill Allombert wrote:
> On Sat, Sep 28, 2013 at 09:40:07PM +0200, Vincent Lefevre 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.
> It does break GAP at least.
I like to clarify that I see this is purely as a Debian issue.
Bill. <ballombe at debian.org>
Imagine a large red swirl here.
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