[FFmpeg-devel] [flamefest-start] A little something on MMX/SSE intrinsics

[Luca Barbato]

Michael Niedermayer wrote:
> On Wed, Feb 27, 2008 at 05:42:58PM +0200, Ivan Kalvachev wrote:
>> On Wed, Feb 27, 2008 at 4:31 PM, Reimar D?ffinger
>> <Reimar.Doeffinger at stud.uni-karlsruhe.de> wrote:
>>> Hello,
>>>  yet another case of someone relearning "intrinsics are still a mess and
>>>  compilers still much too stupid" ;-) :
>>>  http://www.virtualdub.org/blog/pivot/entry.php?id=188#body
>>>
>>>  Let's see if we can make today the flame-heaviest day in FFmpeg history
>>>  :-)
>> Nice read.
>>
>> I'd just like to add that there is already architecture in FFmpeg that
>> is entirely optimized on intrinsics - AltiVect. There were few
>> fundamental problems with it and I'm not sure if they have been
>> successfully solved. These include things like generating code that
>> picks up processor SIMD dialect at runtime.
> 
> You just found us a new SOC qualification task
> rewrite intrinsics to proper asm()
> 

And benchmark the result ^^;

lu

-- 

Luca Barbato
Gentoo Council Member
Gentoo/linux Gentoo/PPC
http://dev.gentoo.org/~lu_zero