Contents
vdsinqi - initialize the array WSAVE, which is used in both
VSINQF and VSINQB.
SUBROUTINE VDSINQI(N, WSAVE)
INTEGER N
DOUBLE PRECISION WSAVE(*)
SUBROUTINE VDSINQI_64(N, WSAVE)
INTEGER*8 N
DOUBLE PRECISION WSAVE(*)
F95 INTERFACE
SUBROUTINE VSINQI(N, WSAVE)
INTEGER :: N
REAL(8), DIMENSION(:) :: WSAVE
SUBROUTINE VSINQI_64(N, WSAVE)
INTEGER(8) :: N
REAL(8), DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void vdsinqi(int n, double *wsave);
void vdsinqi_64(long n, double *wsave);
N (input) Length of the sequence to be transformed. The
method is most efficient when N is a product of
small primes.
WSAVE (input)
On entry, an array with a dimension of at least (2
* N + 15). The same work array can be used for
both VSINQF and VSINQB 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
VSINQF or VSINQB as long as N and WSAVE remain
unchanged, thus subsequent transforms can be
obtained faster than the first.