[gmx-users] Intel compilers

Erik Lindahl lindahl at stanford.edu
Mon Mar 25 19:00:38 CET 2002

Alan Wilter Sousa da Silva wrote:

>Hi List,
>	Does Intel compiler work well with AMD processors?  And how to get
>a free license?


Just go to http://www.intel.com/software/products

Note that there is no separate C compiler - it's included in the C++ one.

Rumor actually says AMD Athlon benefits even more than Pentium III's 
from these compilers, but I haven't tried it myself.

I don't expect Gromacs to benefit from this compiler on an Athlon either 
since we already use SSE and/or 3DNow loops.

For good general performance it's important to use the flags that 
produce code with Katmai instructions (Pentium III or later, this will 
work with Athlon XP/MP too, but not older Athlons.).

If you want good double precision performance you need a pentium4 and 
should use the Willamette instructions. I don't remember the flags by 
heart, but don't worry - there are good manuals included in the packages.



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