ezffti(3P) Sun Performance Library ezffti(3P)NAMEezffti - initializes the array WSAVE, which is used in both EZFFTF and
EZFFTB.
SYNOPSIS
SUBROUTINE EZFFTI(N, WSAVE)
INTEGER N
REAL WSAVE(*)
SUBROUTINE EZFFTI_64(N, WSAVE)
INTEGER*8 N
REAL WSAVE(*)
F95 INTERFACE
SUBROUTINE EZFFTI(N, WSAVE)
INTEGER :: N
REAL, DIMENSION(:) :: WSAVE
SUBROUTINE EZFFTI_64(N, WSAVE)
INTEGER(8) :: N
REAL, DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void ezffti(int n, float *wsave);
void ezffti_64(long n, float *wsave);
ARGUMENTS
N (input) Length of the sequence to be transformed. N >= 0.
WSAVE (input/output)
On entry, an array with a dimension of at least (3 * N + 15).
The same work array can be used for both EZFFTF and EZFFTB as
long as N remains unchanged. Different WSAVE arrays are
required for different values of N. This initialization does
not have to be repeated between calls to EZFFTF or EZFFTB as
long as N and WSAVE remain unchanged, thus subsequent transā
forms can be obtained faster than the first.
6 Mar 2009 ezffti(3P)