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NAME
     cfft3i - initialize the array xWSAVE, which is used in  both
     xFFT3F and xFFT3B.

SYNOPSIS
     SUBROUTINE CFFT3I(M, N, K, RWSAVE)

     SUBROUTINE ZFFT3I(M, N, K, DWSAVE)



     #include <sunperf.h>

     void cfft3i(int m, int n, int k, complex *wsave);

     void zfft3i(int m, int n, int k, doublecomplex *wsave);

ARGUMENTS
     M         Number of rows to be transformed.  M >= 0.

     N         Number of columns to be transformed.  N >= 0.

     K         Number of planes to be transformed.  K >= 0.

     xWSAVE    On entry, an array with dimension of at least (M +
               N  + MAX(M,N,K) + 45) for real inputs or (2 * (M +
               N + MAX(M,N)) + 45) for complex inputs.  The  same
               work array can be used for both xFFTF and xFFTB as
               long as M, N, and K remain  unchanged.   Different
               xWSAVE arrays are required for different values of
               M, N, and K.  This initialization does not have to
               be  repeated  between  calls  to xFFTF or xFFTB as
               long as M, N, K, and xWSAVE remain unchanged, thus
               subsequent  transforms can be obtained faster than
               the first.

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