dfft3i (3p)

Name

dfft3i - initialize the array WSAVE, which is used in both DFFT3F and DFFT3B.

Synopsis

SUBROUTINE DFFT3I(M, N, K, WORK)

INTEGER M, N, K
DOUBLE PRECISION WORK(*)

SUBROUTINE DFFT3I_64(M, N, K, WORK)

INTEGER*8 M, N, K
DOUBLE PRECISION WORK(*)




F95 INTERFACE
SUBROUTINE FFT3I(M, N, K, WORK)

INTEGER :: M, N, K
REAL(8), DIMENSION(:) :: WORK

SUBROUTINE FFT3I_64(M, N, K, WORK)

INTEGER(8) :: M, N, K
REAL(8), DIMENSION(:) :: WORK




C INTERFACE
#include <sunperf.h>

void dfft3i(int m, int n, int k, double *work);

void dfft3i_64(long m, long n, long k, double *work);

Description

Oracle Solaris Studio Performance Library                           dfft3i(3P)



NAME
       dfft3i  -  initialize the array WSAVE, which is used in both DFFT3F and
       DFFT3B.


SYNOPSIS
       SUBROUTINE DFFT3I(M, N, K, WORK)

       INTEGER M, N, K
       DOUBLE PRECISION WORK(*)

       SUBROUTINE DFFT3I_64(M, N, K, WORK)

       INTEGER*8 M, N, K
       DOUBLE PRECISION WORK(*)




   F95 INTERFACE
       SUBROUTINE FFT3I(M, N, K, WORK)

       INTEGER :: M, N, K
       REAL(8), DIMENSION(:) :: WORK

       SUBROUTINE FFT3I_64(M, N, K, WORK)

       INTEGER(8) :: M, N, K
       REAL(8), DIMENSION(:) :: WORK




   C INTERFACE
       #include <sunperf.h>

       void dfft3i(int m, int n, int k, double *work);

       void dfft3i_64(long m, long n, long k, double *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)  +  30)  or
                 greater.   DFFT3I  needs to be called only once to initialize
                 array WORK before calling DFFT3F and/or DFFT3B 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.




                                  7 Nov 2015                        dfft3i(3P)