FFTW to CUFFT

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello. I’m have a C code that work with FFTW but now I’m trying to use CUFFT, but it doesn’t work. I’m having problems with those functions:

  • (double*) malloc(sizeof(double) * nos);
  • plan_forward1 = fftw_plan_dft_r2c_1d(nos, in1, reinterpret_cast(out1), FFTW_ESTIMATE);
  • fin1 = (double *) fftw_malloc(sizeof(double) * nos);
  • plan_backward1 = fftw_plan_dft_c2r_1d(nos, reinterpret_cast(out1), fin1, FFTW_ESTIMATE);
  • fftw_execute(plan_forward1);
  • fftw_execute(plan_backward1);
  • fftw_destroy_plan(plan_forward1);
  • fftw_free(in1);

Please, I need suggestions to solve my problem. I’m working with Visual Studio.

Thanks

2

What is the problem with those functions? You need to replace them by the appropriate cufft functions.
Note that there is no 1-to-1 correspondence between cufft and fftw fucntions. For example you do not need to define 2 plans for forward and backward transformation in cufft. It is an option to cufftExecX2X.

Check the examples in the documentation [url]cuFFT :: CUDA Toolkit Documentation.