[eigen] vectorization of sum |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: [eigen] vectorization of sum*From*: Benoît Jacob <jacob@xxxxxxxxxxxxxxx>*Date*: Mon, 23 Jun 2008 10:08:36 +0200

Hi, I looked at general vectorization of redux but this is not very convenient... - in the general case it would be better done as a separate method packetRedux - this would require the size to be a multiple of packetsize even in dynamic case - this is not the same as vectorizing redux when possible (return type is a packet instead of a scalar) - the final reduction step producing a scalar is not available in general, only in the special case of the sum is it available as ei_predux... So instead, I'm now looking at splitting sum away from Redux, and vectorizing it. Cheers, Benoit

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