cfft3i(3P) Sun Performance Library cfft3i(3P)NAMEcfft3i - initialize the array WSAVE, which is used in both CFFT3F and
CFFT3B.
SYNOPSIS
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);
ARGUMENTS
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 initializa‐
tion of the workspace.
6 Mar 2009 cfft3i(3P)