gmp-4.2 performance on x86_64

Ashod Nakashian saghmos at
Wed Mar 29 21:37:27 CEST 2006


Does that include my code as well? I added a few modules for some basic 
operations to a previous patch for x86_64 (this was a while back, 
searching the mail-list archives should be useful). May be somebody 
improved on them, may be somebody wrote a better (read: faster) version. 
But they did improve the benchmarks for me (compared to the original + 
Pierrick's patch).

Ashod Nakashian

Pierrick Gaudry wrote:
> On Wed, Mar 29, 2006 at 11:07:00AM -0500, Kate Minola wrote:
>>On my 2.2GHz x86_64-unknown-linux-gnu machine
>>I get the following gmpbench results:
>>  gmp-4.1.4-gaudry  7863.2
>>  gmp-4.2           7375.2
>>  gmp-4.1.4         4645.6
>>gmp-4.1.4-gaudry is using the assembly code by
>>Patrick Gaudry at
>>All were compiled with the same compiler, gcc-4.1.0.
>>While I want to use gmp-4.2 to pick up bug fixes, I do not
>>want to lose the speed of gmp-4.1.4-gaudry.
>>Doing the obvious to use Gaudry's assembler code in gmp-4.2
>>causes a failure to compile (for me).
>>Comments?  Suggestions?
>>Kate Minola
>>Engineering Department
>>University of Maryland, College Park
> A version of the patch for GMP-4.2 is available at:
> The webpage is not yet updated, but the install procedure is as for the
> patch of 4.1.4:
>   tar zxf mpn_amd64.42.tgz
>   cd mpn_amd64.42
>   ./install /path_to_gmp/gmp-4.2
>   cd /path_to_gmp/gmp-4.2
>   ./configure && make && make install
> I get a gmpbench result around 10000 on a 2.4 GHz Opteron (8200 with
> plain 4.2)
> Pierrick.
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