Contents
vdcosti - initialize the array WSAVE, which is used in
VCOST.
SUBROUTINE VDCOSTI(N, WSAVE)
INTEGER N
DOUBLE PRECISION WSAVE(*)
SUBROUTINE VDCOSTI_64(N, WSAVE)
INTEGER*8 N
DOUBLE PRECISION WSAVE(*)
F95 INTERFACE
SUBROUTINE VCOSTI(N, WSAVE)
INTEGER :: N
REAL(8), DIMENSION(:) :: WSAVE
SUBROUTINE VCOSTI_64(N, WSAVE)
INTEGER(8) :: N
REAL(8), DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void vdcosti(int n, double *wsave);
void vdcosti_64(long n, double *wsave);
N (input) Length of the sequence to be transformed. The
method is most efficient when N - 1 is a product
of small primes. N >= 2.
WSAVE (input)
On entry, an array of dimension (2 * N + 15) or
greater. VDCOSTI is called once to initialize
WSAVE before calling VDCOST and need not be called
again between calls to VDCOST if N and WSAVE
remain unchanged. Thus, subsequent transforms of
same size can be obtained faster than the first
since they do not require initialization of the
workspace.