ezffti (3p)

Name

ezffti - 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);

Description

Oracle Solaris Studio Performance Library                           ezffti(3P)



NAME
       ezffti  - 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 trans-
                 forms can be obtained faster than the first.



                                  7 Nov 2015                        ezffti(3P)