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

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On 07/09/10 22:44:00, Manoj Rajagopalan wrote:
> Hi,
>    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.

Here is mine ( Gentoo 2.6.34 )

flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext 
fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good 
nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm 
extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit 
wdt npt lbrv svm_lock nrip_save

at least  sse4a

Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

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