ezffti man page on OpenIndiana

ezffti man page on OpenIndiana

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ezffti(3P)		    Sun 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.

				  6 Mar 2009			    ezffti(3P)

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