[eigen] No sse3/4 on AMD Phenom II?

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   I just bought two machines with AMD Phenom II X4 black processors that are 
supposed to be SSE3 and SSE4a capable but 'cat /proc/cpuinfo' shows only sse, 
sse2 and ssse3. Also, compiling eigen programs with -msse3 flags (GCC) 
results in illegal instruction runtime errors.

   Has anyone in this list seen something similar? Is there a way to leverage 
the SSE3 capability of these processors? I'm running a fairly new kernel 
(with kernel 2.6.32) in Ubuntu 10.04 LTS.


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