[Beowulf] AMD Athlon with Intel Fortran Compiler, which options?

Mikhail Kuzminsky kus at free.net
Wed Mar 23 12:08:29 EST 2005

In message from Joe Landman <landman at scalableinformatics.com> (Tue, 22 
Mar 2005 18:43:32 -0500):
>I thought they still had processor check code in there, that checks 
>the intel CPU id, and defaults to p3/p4 base w/o SSE.  You can compile 
>it, it just might not select that code path (SSE*).   Does this for 
> Opterons.
   The checks of CPUID (at runtime) were added to 8.1 versions of 
Intel compiler.

>Stuart Midgley wrote:
>> Actually you can use everything except the SSE3 stuff. 
If I remember correctly, Athlon's have no SSE2 support.

Mikhail Kuzminsky
Zelinsky Institute of Organic Chemistry

>> Once the 
>> Opterons are out and about, you will be able to use SSE3 as well.
>> I have managed to compile code in 64bit mode on an opteron using the 
>> Intel compilers.  If I remember correctly, I used something like
>>     -fast -xW
>> whereas -fast usually turns on -xP which gives SSE3 stuff.
>> Stu.
>Joseph Landman, Ph.D
>Founder and CEO
>Scalable Informatics LLC,
>email: landman at scalableinformatics.com
>web  : http://www.scalableinformatics.com
>phone: +1 734 786 8423
>fax  : +1 734 786 8452
>cell : +1 734 612 4615

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