[FFmpeg-devel] [PATCH 04/12] Add vector_fmul_matrix to dsputil

[Måns Rullgård]

Reimar D?ffinger <Reimar.Doeffinger at gmx.de> writes:

> On Wed, Oct 21, 2009 at 07:22:57PM +0100, M?ns Rullg?rd wrote:
>> Michael Niedermayer <michaelni at gmx.at> writes:
>> 
>> > On Mon, Oct 19, 2009 at 01:00:24AM +0100, M?ns Rullg?rd wrote:
>> >> We are doing len [1 x w]*[w x w] matrix multiplications.
>> >
>> > you can also see it as a single [len x w][w x w] matrix multiplication
>> > and that may also allow faster matrix multiplication algos to be used ...
>> 
>> Do you know a way of multiplying matrixes with fewer operations?
>
> I'm tempted to say "you don't want to go there". I'd have to read up
> again, but yes, it is possible.

Why didn't they tell us that in linear algebra class?  Any pointers?

-- 
M?ns Rullg?rd
mans at mansr.com