Re: Triple parity and beyond

Hi Peter,

Now, that doesn't sound like something that can get neatly meshed into
the Cauchy matrix scheme, I assume.

You are correct. Multiplication by 2^-1 cannot be used for the Cauchy method.

I used it to implement an alternate triple parity not requiring PSHUFB
that I used as reference for performance evaluation of the Cauchy way,
assuming that this implementation using powers of 1,2,2^-1 is the
fastest possible one.

Hopefully the difference is minimal, and the Cauchy method is
competitive even at triple parity.

Ciao,
Andrea