[HEADSUP] Atlas changed libraries

Kevin Kofler kevin.kofler at chello.at
Thu Sep 26 14:48:03 UTC 2013


Dan HorĂ¡k wrote:
> Missing support for s390/s390x is a problem for us (with my red hat
> on). Is there no fallback implementation?
> 
> Does is OpenBLAS fail completely when CPU not listed above is found?
> Because for Power7 and up anything written for Power < 7 will work.

Unfortunately, from what I got from the ARM support discussion, yes, it will 
fail, no, there's no fallback C implementation for level 1 and 2 BLAS (the 
basic and most commonly used functions), only for level 3. The ARM folks 
started by writing some C code for level 1 and 2, but whether it is complete 
(they also started writing some ARM assembly, of course) and whether they 
will make it available as a generic fallback, I don't know. There was also 
some talk about some assembly primitives being needed for thread-related 
stuff.

So you should probably talk to the upstream developer working on the ARM 
port about additional architecture support.

        Kevin Kofler



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