[gmx-developers] 3Dnow! trouble

Frank Wennmohs frankw at bph.ruhr-uni-bochum.de
Sat May 18 16:12:57 CEST 2002

On Sat, May 18, 2002 at 02:51:43PM +0200, David van der Spoel wrote:
> On Sat, 18 May 2002, Frank Wennmohs wrote:
> >Hello all!
> >
> >I just ran into trouble in a simple md run while
> >using 3Dnow! on an Athlon processor.
> >
> >The energies suddenly became excessively high (>1E+20).
> >This just happens from time to time. Disabling the assembly
> >loops everything runs smoothly. This does not happen
> >when using SSE on AthlonMP.
> >
> >The error happened on a FreeBSD-4.5 box.
> >I remember something about errors in the assembly loops 
> >some (longer) time ago. 
> that's correct but it has been fixed. Did you check the vrsion history?

Not yet.

> WHich version are you running?

I'm running gromacs-3.1.3 and the 3dnow part is at

The proccessor is using extended 3dnow.


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