Bill Allombert on Fri, 6 Dec 2002 15:18:13 +0100

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: 2 changes in the CVS

On Fri, Dec 06, 2002 at 03:12:55PM +0100, Karim BELABAS wrote:
> On Fri, 6 Dec 2002, Bill Allombert wrote:
> > I have commited two change to the CVS.
> While we are at it: I have enabled Karatsuba multiplication for t_REAL (code
> has been here for at least 2 years, but was unused). It is not properly tuned
> yet, but at least it seems to give correct (and correctly rounded) results.
> The speedup is not that impressive: a factor 2 for exp(1) at \p20000, a
> factor 4 at \p100000. I have not implemented Mulders or Hanrot-Zimmermann
> short products (maybe a further 30%, on average ??).

If you start changing the kernel, then I really need to know if I can
apply my patch to the gmp-kernel-2.2.5 branch to be able to keep up with your