[PyCUDA] Parallel prefix scan

[Andreas Kloeckner]

Hi Nithin, Bryan, all,

On Wed, 23 Feb 2011 01:00:05 +0530, nithin s <nithin19484 at gmail.com> wrote:
> Wow.. thats quite a bit of work.   ..  though I must admit on first
> inspection of the kernel code it was evident that as the kernel goes
> up and down tree there is a great deal of waiting.
> 
> Any how I don't quite have the energy to get another version working
> in the near future. I'm leaving it to the community to use the code or
> not.

Thanks very much for submitting this code.

PyCUDA and PyOpenCL now both have a scan implementation. I did not end
up using your code, but instead I ended up stealing directly from
thrust.

http://documen.tician.de/pycuda/array.html#module-pycuda.scan
http://documen.tician.de/pyopencl/array.html#module-pyopencl.scan

The code for both is actually one and the same file, using 'glue' called
py{opencl,cuda}._cluda...

Andreas
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