Intel® oneAPI Math Kernel Library Developer Reference - C

DFT Functionality

DFTI Interfaces
Functionality CPU OpenMP Offload Intel GPU
Complex-to-Complex FFT transformations

Yes, 1D through 7D

Yes, 1D through 3D

Real-to-Complex FFT transformations

Yes, 1D through 7D

Yes, 1D through 3D

FFTW3 Interfaces
Functionality CPU OpenMP Offload Intel GPU
Complex-to-Complex FFT transformations

Yes, 1D through 7D

Yes, 1D through 3D

Real-to-Complex FFT transformations

Yes, 1D through 7D

No

FFTW2 Interfaces
Functionality CPU OpenMP Offload Intel GPU
Complex-to-Complex FFT transformations

Yes, 1D through 7D

No

Real-to-Complex FFT transformations

Yes, 1D through 7D

No