|Bill Allombert on Fri, 6 Dec 2002 15:18:13 +0100|
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|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 change. Thanks, Bill.