Jason, those speedups look great. Always good to see things getting faster!

Regarding the GCD code I want to mention that this is the version that
has been in GMP for some time. Their code was neater than ours and
performed slightly better, so I recommended we use their version
instead of the version I had hacked together.

The credit for this code is almost certainly due to Niels Moller and
Torbjorn Granlund. The algorithm itself is due to Niels. If someone
else also worked on this, please let us know and we can credit them
for it. Niels' paper is here:
http://www.lysator.liu.se/~nisse/archive/S0025-5718-07-02017-0.pdf

Of course that is the same algorithm as the one we had implemented,
just a much improved implementation of it.

Bill.

On 5 January 2012 07:35, Jason <ja...@njkfrudils.plus.com> wrote:
> Hi
>
> MPIR 2.5.0 was released on 5th January 2012.
>
> * source tarballs: http://www.mpir.org/mpir-2.5.0.tar.bz2
>                   http://www.mpir.org/mpir-2.5.0.tar.lzma
> * documentation:   http://www.mpir.org/mpir-2.5.0.pdf
>
> See the MPIR website (www.mpir.org) for known issues and a list of supported 
> platforms/hardware in the form of the test matrix.
>
> The main features and changes for this release are:
>
> Bug Fixes:
>
>  * Correct rounding mode make check tests
>
> Speedups:
>
>  * x86_64 fat build now uses RIP relative addressing
>  * Toom22 speedup via assembler
>  * New x86_64 assembler code
>  * New Toom eval function using the new assembler code
>  * Detect another Sandybridge CPU
>  * New GCD code (by the GMP project)
>
> Features:
>
>  * General cleanup of old features
>  * Upgrade intenal component YASM
>  * MSVC build tweeks
>  * New experimental MSVC python build system
>
> Changes:
>
>  * Remove explicit support for thumb m68k and sh cpu's
>
>
> Regards
>   The MPIR Team
>
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