vcffti (3p)

Name

vcffti - initialize the array WSAVE, which is used in both VCFFTF and VCFFTB.

Synopsis

SUBROUTINE VCFFTI(N, WSAVE)

COMPLEX WSAVE(*)
INTEGER N

SUBROUTINE VCFFTI_64(N, WSAVE)

COMPLEX WSAVE(*)
INTEGER*8 N




F95 INTERFACE
SUBROUTINE VFFTI(N, WSAVE)

COMPLEX, DIMENSION(:) :: WSAVE
INTEGER :: N

SUBROUTINE VFFTI_64(N, WSAVE)

COMPLEX, DIMENSION(:) :: WSAVE
INTEGER(8) :: N




C INTERFACE
#include <sunperf.h>

void vcffti(int n, complex *wsave);

void vcffti_64(long n, complex *wsave);

Description

Oracle Solaris Studio Performance Library                           vcffti(3P)



NAME
       vcffti  -  initialize the array WSAVE, which is used in both VCFFTF and
       VCFFTB.


SYNOPSIS
       SUBROUTINE VCFFTI(N, WSAVE)

       COMPLEX WSAVE(*)
       INTEGER N

       SUBROUTINE VCFFTI_64(N, WSAVE)

       COMPLEX WSAVE(*)
       INTEGER*8 N




   F95 INTERFACE
       SUBROUTINE VFFTI(N, WSAVE)

       COMPLEX, DIMENSION(:) :: WSAVE
       INTEGER :: N

       SUBROUTINE VFFTI_64(N, WSAVE)

       COMPLEX, DIMENSION(:) :: WSAVE
       INTEGER(8) :: N




   C INTERFACE
       #include <sunperf.h>

       void vcffti(int n, complex *wsave);

       void vcffti_64(long n, complex *wsave);



ARGUMENTS
       N (input) Length of the sequence to be transformed.  N >= 0.


       WSAVE (input/output)
                 On entry, an array  of  dimension  (2*N  +  15)  or  greater.
                 VCFFTI  needs  to  be  called  only  once to initialize WSAVE
                 before calling VCFFTF and/or VCFFTB if  N  and  WSAVE  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 initialization of
                 the workspace.



                                  7 Nov 2015                        vcffti(3P)