Re: fftw: Usage of SSE in 64bit?
On Jun 21, 2011, at 9:22 AM, Charles Montgomery wrote:
I haven't had a chance yet to check, but that sounds like the likely
explanation. I missed that in the documentation. It isn't
mentioned again in the section on 'FFTW Constants in Fortran', which
recommends just using the file /usr/include/fftw3.f, which has only
INTEGER rather than (non-standard) INTEGER*8.
The constants are indeed INTEGERs, as are the array lengths etcetera.
Only the plan is INTEGER*8.
We've never heard of a modern Fortran compiler that didn't support
INTEGER*8. If you have an ancient system that only has INTEGER, then
probably it is a 32-bit system and INTEGER is fine.