cfft2f - compute the Fourier coefficients of a periodic sequence. The xFFT operations are unnormalized, so a call of xFFT2F followed by a call of xFFT2B will multiply the input sequence by M*N.
SUBROUTINE CFFT2F( M, N, A, LDA, WORK, LWORK) COMPLEX A(LDA,*) INTEGER M, N, LDA, LWORK REAL WORK(*)
SUBROUTINE CFFT2F_64( M, N, A, LDA, WORK, LWORK) COMPLEX A(LDA,*) INTEGER*8 M, N, LDA, LWORK REAL WORK(*)
SUBROUTINE FFT2F( [M], [N], A, [LDA], WORK, LWORK) COMPLEX, DIMENSION(:,:) :: A INTEGER :: M, N, LDA, LWORK REAL, DIMENSION(:) :: WORK
SUBROUTINE FFT2F_64( [M], [N], A, [LDA], WORK, LWORK) COMPLEX, DIMENSION(:,:) :: A INTEGER(8) :: M, N, LDA, LWORK REAL, DIMENSION(:) :: WORK
#include <sunperf.h>
void cfft2f(int m, int n, complex *a, int lda, float *work, int lwork);
void cfft2f_64(long m, long n, complex *a, long lda, float *work, long lwork);
A(M,N)
that contains the sequences to be transformed.