On 2013-01-07 21:59, Volker Braun wrote:
> Its pretty clear that the newer GCC correctly vectorizes ATLAS for the
> CPU whereas the old one did not.

I doubt it's ATLAS. I didn't find any particular difference in the ATLAS
install logs. It's curious to see that ATLAS somehow brute-forces CPU
flags, it even tries stuff like -mcpu=ultrasparc on x86!

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