[PyOpenCL] Error with nVidia, not ATI - Code selection failed to select, i1: add

[Patric Holmvall]

Hi,
Do you have any ideas on what I can do and where I should turn in order to
solve this problem?


Patric

On Tue, Jun 28, 2011 at 3:12 PM, Andreas Kloeckner
<lists at informa.tiker.net>wrote:

> On Tue, 28 Jun 2011 10:45:06 +0200, Patric Holmvall <patric.hol at gmail.com>
> wrote:
> > Hi,
> > I have a problem that only occurs on nVidia platforms. I have managed to
> > trace the problem to a certain piece of my code, i.e. the calling of two
> > functions. The code works under all circumstances on my ATI card, and
> fails
> > at the same time/place on two nVidia cards. The error arises during the
> > build of the kernel. The strange thing is, that when I greatly reduce the
> > amount of calculations in the functions (less terms in the return
> statement
> > - see code below), it might work some times. If i reduce the calculations
> > slightly but reduce other calculations outside the two functions, it
> might
> > work too.
> >
> > Worthy to note is that the code worked when the elements that the
> functions
> > operate on are private memory. The error started to occur when I
> implemented
> > work groups and made the elements that it operates on to local (this
> still
> > works on ATI).
> >
> > I tried updating drivers, and have tried both 2011.1beta3 and 2011.1.1,
> but
> > the error still occurs.
>
> Looks like an Nv bug. Not sure there's anything we can do from the
> PyOpenCL side.
>
> Andreas
>
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