[speex-dev] [PATCH] Make SSE Run Time option.

[Ian Ollmann]

On Thu, 15 Jan 2004, Jean-Marc Valin wrote:

> > Personally, I don't think much of PNI. The complex arithmetic stuff they
> > added sets you up for a lot of permute overhead that is inefficient --
> > especially on a processor that is already weak on permute. In my opinion,
>
> Actually, the new instructions make it possible to do complex multiplies
> without the need to permute and separate the add and subtract. The
> really useful instruction here is the "addsubps".

Would you like to prove it with a code sample?

Ian

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