Contents
cfft3i - initialize the array WSAVE, which is used in both
CFFT3F and CFFT3B.
SUBROUTINE CFFT3I(M, N, K, WORK)
INTEGER M, N, K
REAL WORK(*)
SUBROUTINE CFFT3I_64(M, N, K, WORK)
INTEGER*8 M, N, K
REAL WORK(*)
F95 INTERFACE
SUBROUTINE CFFT3I(M, N, K, WORK)
INTEGER :: M, N, K
REAL, DIMENSION(:) :: WORK
SUBROUTINE CFFT3I_64(M, N, K, WORK)
INTEGER(8) :: M, N, K
REAL, DIMENSION(:) :: WORK
C INTERFACE
#include <sunperf.h>
void cfft3i(int m, int n, int k, float *work);
void cfft3i_64(long m, long n, long k, float *work);
M (input) Number of rows to be transformed. M >= 0.
N (input) Number of columns to be transformed. N >= 0.
K (input) Number of planes to be transformed. K >= 0.
WORK (input/output)
On entry, an array of dimension (4*(M + N + K) +
45) or greater. CFFT3I needs to be called only
once to initialize array WORK before calling
CFFT3F and/or CFFT3B if M, N, K and WORK remain
unchanged between these calls. Thus, subsequent
transforms or inverse transforms of same size can
be obtained faster than the first since they do
not require initialization of the workspace.