T3/T3 mul_2 and addmul_2

[David Miller]

From: Torbjorn Granlund <tg at gmplib.org>
Date: Thu, 07 Mar 2013 20:58:51 +0100

> I wrote 4-way unrolled mul_2 and addmul_2 for T3/T4.
> 
> The FAKE_T3 stuff includes missing.m4, which impelements some
> instructions missing from my old systems around here.  I might retain
> that stuff for a while to allow local regression testing, even if it is
> a bit ugly.
> 
> Could you please run time timing tests on this?
> 
> I'm reasonably sure this is correct.

I'll try to find some time, I'm currently preparing a talk for a
conference I'm travelling to tomorrow.