[FFmpeg-devel] [PATCH] SSE dct32()

Michael Niedermayer michaelni
Mon Jul 5 00:55:15 CEST 2010

On Sat, Jul 03, 2010 at 06:47:52PM +0200, Vitor Sessak wrote:
> On 06/30/2010 10:45 PM, Vitor Sessak wrote:
>> On 06/30/2010 10:11 PM, Vitor Sessak wrote:
>>> On 06/30/2010 09:47 PM, Michael Niedermayer wrote:
>>>> On Wed, Jun 30, 2010 at 06:59:34PM +0200, Vitor Sessak wrote:
>>>> [...]
>>>>>>> Anyway, in what does it influences the patch to move dct32() to
>>>>>>> shared
>>>>>>> code? New version attached (dct32_common.diff)...
>>>>>> ping?
>>>>> No route to host?
>>>> yes, sorry, patch ok
>>>> also others (loren/jason) are welcome to help review mp3 optim patches
>>>> if they want
>>> Applied.
>> And now a SSE optimized version.
> Ping?

its probably possible to improve its speed by interleaving the input from
several dcts. This way all elements in registers could always be handled equal
no shuf*

Of course that would be a bit of work to change the surrouding code to
deal with such blocks efficiently

well, you asked ;)
iam not seriously suggesting you do that work.
real review left to jason/loren/ronald/... i have too many patches and other
issues piled up ATM. in worst case just commit i trust you that your code is
not that bad to block this.


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many that live deserve death. And some that die deserve life. Can you give
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even the very wise cannot see all ends. -- Gandalf
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