dezfti(3P) Sun Performance Library dezfti(3P)NAMEdezfti - initializes the array WSAVE, which is used in both DEZFTF and
DEZFTB.
SYNOPSIS
SUBROUTINE DEZFTI(N, WSAVE)
INTEGER N
DOUBLE PRECISION WSAVE(*)
SUBROUTINE DEZFTI_64(N, WSAVE)
INTEGER*8 N
DOUBLE PRECISION WSAVE(*)
F95 INTERFACE
SUBROUTINE DEZFTI(N, WSAVE)
INTEGER :: N
REAL(8), DIMENSION(:) :: WSAVE
SUBROUTINE DEZFTI_64(N, WSAVE)
INTEGER(8) :: N
REAL(8), DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void dezfti(int n, double *wsave);
void dezfti_64(long n, double *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 DEZFTF and DEZFTB 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 DEZFTF or DEZFTB as
long as N and WSAVE remain unchanged, thus subsequent transā
forms can be obtained faster than the first.
6 Mar 2009 dezfti(3P)