[FFmpeg-devel] [PATCH] VP8: avoid conditional and division for chroma MV

[Stefan Gehrer]

On 06/23/2010 08:07 PM, M?ns Rullg?rd wrote:
> Stefan Gehrer<stefan.gehrer at gmx.de>  writes:
>
>> On 06/23/2010 06:51 PM, Ronald S. Bultje wrote:
>>> Hi,
>>>
>>> On Wed, Jun 23, 2010 at 12:44 PM, Stefan Gehrer<stefan.gehrer at gmx.de>   wrote:
>>>> Are there any recommended samples to test against?
>>>
>>> http://code.google.com/p/webm/downloads/detail?name=vp8-test-vectors-r1.zip&can=2&q=
>>
>> Okay, I tested some clips from the test vector and
>> the frame CRCs stay the same with the patch.
>> But when I compile on my machine with gcc 4.4.3 amd -O3
>> it seems clever enough to avoid conditional and division
>> anyway.
>> So now I believe in the correctness of the patch, I am
>> just not so sure about the usefulness.
>
> That's just one compiler on the primary target.  Is it just as clever
> when targeting things like ARM?

Who would be faster to find out than you?