Re: [eigen] vectorization of complex |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx*Subject*: Re: [eigen] vectorization of complex*From*: Joel Falcou <joel.falcou@xxxxxx>*Date*: Tue, 20 Jul 2010 16:06:18 +0200

On 20/07/10 16:01, Gael Guennebaud wrote:

On Tue, Jul 20, 2010 at 2:38 PM, FMDSPAM<fmdspam@xxxxxxxxx> wrote:Am 20.07.2010 11:47, schrieb Gael Guennebaud:[...] but 3 swizzling and one "bitwise or" operation to negate some coefficients. This make it far to be optimal. In particular swizzling is extremely costly. Moreover all these "complex" operations requires many additional registers to store the temporaries. [...]In another threat matlab was "blamed" to use separate matrices for real and imaginary parts instead of one matrix of complex coeff. How do you think, this would compete?Good point, with such an approach it is straightforward to support complex-complex and mixing types on top of a real-real matrix product with good performance I guess....

Also note all LAPACK thingy use this format.

**Follow-Ups**:**Re: [eigen] vectorization of complex***From:*Gael Guennebaud

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**Re: [eigen] vectorization of complex***From:*Benoit Jacob

**Re: [eigen] vectorization of complex***From:*Gael Guennebaud

**Re: [eigen] vectorization of complex***From:*Benoit Jacob

**Re: [eigen] vectorization of complex***From:*Gael Guennebaud

**Re: [eigen] vectorization of complex***From:*FMDSPAM

**Re: [eigen] vectorization of complex***From:*Gael Guennebaud

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