costi(3P) Sun Performance Library costi(3P)NAMEcosti - initialize the array WSAVE, which is used in COST.
SYNOPSIS
SUBROUTINE COSTI(N, WSAVE)
INTEGER N
REAL WSAVE(*)
SUBROUTINE COSTI_64(N, WSAVE)
INTEGER*8 N
REAL WSAVE(*)
F95 INTERFACE
SUBROUTINE COSTI(N, WSAVE)
INTEGER :: N
REAL, DIMENSION(:) :: WSAVE
SUBROUTINE COSTI_64(N, WSAVE)
INTEGER(8) :: N
REAL, DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void costi(int n, float *wsave);
void costi_64(long n, float *wsave);
ARGUMENTS
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/output)
On entry, an array of dimension (3 * N + 15) or greater.
COSTI is called once to initialize WSAVE before calling COST
and need not be called again between calls to COST 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.
6 Mar 2009 costi(3P)