Hi,

 > I've just realized that most BLAS implementation don't provide anyway to
> do strided matrix accesses in the non-leading dimension ... ! Is this
> correct?

yes, this is correct. I probably wasn't considered to be important 
enough back then when memory bandwidths were still high compared to FLOP 
rates.

> I was hoping that we could have avoided such special cases, but it seems
> like a couple of tests will need to be made.

Yeah, it's a bit annoying, but you can still call the native 
ViennaCL-implementation for strided stuff and the dedicated backend for 
non-strided data.

Best regards,
Karli

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