bitwise & optimization

Manuel López-Ibáñez lopezibanez@gmail.com
Wed Jun 10 21:17:00 GMT 2015


On 10 June 2015 at 20:52, Vincent Diepeveen <diep@xs4all.nl> wrote:
> On Wed, 10 Jun 2015, Manuel López-Ibáñez wrote:
>
>> On 09/06/15 17:44, Vincent Diepeveen wrote:
>>>
>>> i remember one of the GCC team
>>> members showing the middlefinger that they simply wanted to keep intel
>>> ahead of
>>> AMD in terms of speed and take care that GCC couldn't rival other
>>> compilers in
>>> terms of speed (the implication of not doing this optimization in branchy
>>> codes).
>>
>>
>> Links or it never happened.
>>
> Yeah i should have saved those discussions on a backupped harddrive from
> back in 2007.

All emails ever posted to the gcc mailing lists are archived online.
You could have saved the links or search for them. So far, "it didn't
happen" wins.

But let's imagine it did happen. Still, what one person may have said
or not 8 years ago doesn't matter today. AMD engineers regularly
contribute to GCC and revise patches proposed by others
(https://gcc.gnu.org/ml/gcc-patches/2015-04/msg00545.html). Unless you
think AMD is also involved in some kind of Swedish Conspiracy
(http://ftp.gnome.org/conspiracy/)...

In any case, if you think you can do better than AMD's own engineers,
guess what? GCC allows you to prove it: "Scratch your own itch",
"Prove that you are right" and "Develop within the community"
(https://gcc.gnu.org/wiki/Community).

Cheers,

Manuel.



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