mod_fft.t File Reference

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Modules
module	mod_fft
	Self-contained complex FFT utilities based on the mixed-radix Singleton transform historically embedded in mod_pfss.

Functions/Subroutines
logical function, public	mod_fft::fft_size_supported (n)
	Return whether the legacy mixed-radix workspace can handle a transform.
integer function, public	mod_fft::fft_next_supported (n)
character(len=128) function, public	mod_fft::fft_factorization (n)
	Human-readable prime factorization used in unsupported-size diagnostics.
subroutine, public	mod_fft::fft_1d (data, inverse)
	In-place complex one-dimensional FFT. The inverse is normalized.
subroutine, public	mod_fft::fft_2d (data, inverse)
	In-place complex two-dimensional FFT. The inverse is normalized.
subroutine, public	mod_fft::fft_2d_real_imag (ar, ai, inverse)
	In-place two-dimensional FFT on split real/imaginary storage. This avoids allocation and copying in repeated plane transforms.
subroutine, public	mod_fft::fft_raw (a, b, ntot, n, nspan, isn)