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

[Reimar Döffinger]

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.