On 09/25/09 12:37, Deji Akingunola wrote:
On Fri, Sep 25, 2009 at 1:10 PM, Christoph Frieben
<christoph.frieben@xxxxxxxxxxxxxx> 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.
-Bob
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