Nicolas Tancogne-Dejean requested to merge fftw_sizes into main Jan 24, 2023

Description

Do not allow FFTW grids that are not compatible with CUFFT ones. This avoids getting different results between GPUs and CPUs.

News snippet

Do not allow FFTW grids that are not compatible with CUFFT ones.

Checklist

I have checked that my code follows the Octopus coding standards
I have added tests for all the new features added in this request.