5 Replies Latest reply on Jan 26, 2011 4:09 PM by kknox

    Double Precision FFT

    mapclyps
      modified Apple FFT on GPU or ... ?

      Hi there,

      I read a few threads about the Apple FFT and the AMD FFT but no one solves my problem.

      I currently use a modified Apple OpenCL FFT with double precision constants and double precision variables. This works great on Nvidia GPUs and CPUs with the Stream SDK 2.3, but like in older threads AMD GPUs seem to produce wrong results. At least my 2GB Radeon 5870 produce wrong results.

      So the question is now: Does anyone have a double precision FFT working on AMD GPUs or maybe have an idea to solve the problem with the Apple FFT.

      I can provide more details on the problem with the Apple FFT if desired and specified.

      cheers,

      mapclyps