fftw fixes #97
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fftw fixes #97
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intent on pointers seems to be about the pointer itself, not the data pointed to. When compiling with the Fujitsu compiler in debug mode, the program stopped with jwe1572i-s line 870 The pointer in is not associated. in D_fftwf_plan_many_r2r.
one more fix of handling the un-used part of the FFTW data. Note: there may be several processors with no elements to transform. Don't rely on being the last in a row or column, instead determine the number of own elements (jonx_me, jony_me) and use those where appropriate.
to save memory when using single precision. Also check that the call succeeded.
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Fixes for running on Fugaku:
intent on pointers in FFTW interface - tripped debug build on Fugaku
fix zeroing of unused parts of p201 - was still wrong when more than one tile has fewer elements
call fftw(f)_alloc_real depending on POIS_PRECISION - save memory by calling the correct fftw allocate.