cosqi(3P) Sun Performance Library cosqi(3P)NAMEcosqi - initialize the array WSAVE, which is used in both COSQF and
COSQB.
SYNOPSIS
SUBROUTINE COSQI(N, WSAVE)
INTEGER N
REAL WSAVE(*)
SUBROUTINE COSQI_64(N, WSAVE)
INTEGER*8 N
REAL WSAVE(*)
F95 INTERFACE
SUBROUTINE COSQI(N, WSAVE)
INTEGER :: N
REAL, DIMENSION(:) :: WSAVE
SUBROUTINE COSQI_64(N, WSAVE)
INTEGER(8) :: N
REAL, DIMENSION(:) :: WSAVE
C INTERFACE
#include <sunperf.h>
void cosqi(int n, float *wsave);
void cosqi_64(long n, float *wsave);
ARGUMENTS
N (input) Length of the sequence to be transformed. The method is most
efficient when N is a product of small primes.
WSAVE (input/output)
On entry, an array of dimension (3 * N + 15) or greater.
COSQI needs to be called only once to initialize WSAVE before
calling COSQF and/or COSQB if N and WSAVE remain unchanged
between these calls. Thus, subsequent transforms or inverse
transforms of same size can be obtained faster than the first
since they do not require initialization of the workspace.
6 Mar 2009 cosqi(3P)
