dcosqi (3p)

Name

dcosqi - initialize the array WSAVE, which is used in both COSQF and COSQB.

Synopsis

SUBROUTINE DCOSQI(N, WSAVE)

INTEGER N
DOUBLE PRECISION WSAVE(*)

SUBROUTINE DCOSQI_64(N, WSAVE)

INTEGER*8 N
DOUBLE PRECISION WSAVE(*)




F95 INTERFACE
SUBROUTINE COSQI(N, WSAVE)

INTEGER :: N
REAL(8), DIMENSION(:) :: WSAVE

SUBROUTINE COSQI_64(N, WSAVE)

INTEGER(8) :: N
REAL(8), DIMENSION(:) :: WSAVE




C INTERFACE
#include <sunperf.h>

void dcosqi(int n, double *wsave);

void dcosqi_64(long n, double *wsave);

Description

Oracle Solaris Studio Performance Library                           dcosqi(3P)



NAME
       dcosqi  -  initialize  the array WSAVE, which is used in both COSQF and
       COSQB.


SYNOPSIS
       SUBROUTINE DCOSQI(N, WSAVE)

       INTEGER N
       DOUBLE PRECISION WSAVE(*)

       SUBROUTINE DCOSQI_64(N, WSAVE)

       INTEGER*8 N
       DOUBLE PRECISION WSAVE(*)




   F95 INTERFACE
       SUBROUTINE COSQI(N, WSAVE)

       INTEGER :: N
       REAL(8), DIMENSION(:) :: WSAVE

       SUBROUTINE COSQI_64(N, WSAVE)

       INTEGER(8) :: N
       REAL(8), DIMENSION(:) :: WSAVE




   C INTERFACE
       #include <sunperf.h>

       void dcosqi(int n, double *wsave);

       void dcosqi_64(long n, double *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.
                 DCOSQI needs to be  called  only  once  to  initialize  WSAVE
                 before  calling  DCOSQF  and/or  DCOSQB 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.



                                  7 Nov 2015                        dcosqi(3P)