Is the cuFFT a "in place" FFT?

[Pimbolie1979]

Is the cuFFT a “in place” FFT

[CudaSpeak]

Is the cuFFT a “in place” FFT

It is if idata = odata! ;) It’s detailed in the manual.

[wanderine]

Anyone who has implemented a fftshift-function as the one in Matlab? Need one for 3D…

[Pimbolie1979]

If a “In Place FFT” faster as a “Not In Place FFT” ?

If a Real to Complex FFT faster as a Complex to Complex FFT?

[CudaSpeak]

If a Real to Complex FFT faster as a Complex to Complex FFT?

From the “Accuracy and Performance” section of the CUFFT Library manual (see the link in my previous post):

For 1D transforms, the

performance for real data will either match or be less than the complex

equivalent (due to an extra copy in come cases). However, there is

usually a performance benefit to using real data for 2D and 3D FFTs,

since all transforms but the last dimension operate on roughly half the

logical signal size

If a “In Place FFT” faster as a “Not In Place FFT” ?

I didn’t notice an answer to this one in my quick scan of the documentation, but it may be there.