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Re: Opinions on packaging ATLAS (for the x86 architecture)



On Fri, Sep 25, 2009 at 4:04 PM, Bob Arendt <rda rincon com> wrote:
> On 09/25/09 12:37, Deji Akingunola wrote:
>>
>> On Fri, Sep 25, 2009 at 1:10 PM, Christoph Frieben
>> <christoph frieben googlemail com>  wrote:
>>>
>>> 2009/9/25 Chris Adams:
>>>>
>>
>>>
>>> (Likewise, the default x86_64 package is currently called
>>>
>>>   atlas [<  atlas-sse3<  ... ]
>>>
>>> and is using SSE2 by default as expected for all x86_64 packages. Higher
>>
>> Actually the atlas x86_64 package is using SSE3 by default. I believe
>> SSE3 is the least common denominator for the x86_64 cpus. And yes,
>> whatever is determined for the x86_32 situation will also apply for
>> SSE4* for x86_64.
>>
>> Deji
>>
> My Athlon(tm) 64 X2 Dual Core Processor 3600+ (running x86_64) isn't
> showing SSE3;  From /proc/cpuinfo
>
> flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
> cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> rdtscp lm 3dnowext 3dnow rep_good extd_apicid pni cx16 lahf_lm cmp_legacy
> svm extapic cr8_legacy 3dnowprefetch
>
> Unless the 3dnow extensions are equivalent to SSE3, it looks like SSE2
> is the least common denominator for the x86_64 cpus.
>

Thanks for the info.

Deji


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