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dfft3i(3P)		    Sun 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.

				  6 Mar 2009			    dfft3i(3P)
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