rfft3i(3P) Sun Performance Library rfft3i(3P)NAMErfft3i - initialize the array WSAVE, which is used in both RFFT3F and
RFFT3B.
SYNOPSIS
SUBROUTINE RFFT3I(M, N, K, WORK)
INTEGER M, N, K
REAL WORK(*)
SUBROUTINE RFFT3I_64(M, N, K, WORK)
INTEGER*8 M, N, K
REAL WORK(*)
F95 INTERFACE
SUBROUTINE FFT3I(M, N, K, WORK)
INTEGER :: M, N, K
REAL, DIMENSION(:) :: WORK
SUBROUTINE FFT3I_64(M, N, K, WORK)
INTEGER(8) :: M, N, K
REAL, DIMENSION(:) :: WORK
C INTERFACE
#include <sunperf.h>
void rfft3i(int m, int n, int k, float *work);
void rfft3i_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 (M + 2*(N + K) + 4*K + 45) or
greater. RFFT3I needs to be called only once to initialize
array WORK before calling RFFT3F and/or RFFT3B 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 rfft3i(3P)
