Contents

• NAME
• SYNOPSIS
  • F95 INTERFACE
  • C INTERFACE
• ARGUMENTS

NAME

     vcosqi - initialize the array WSAVE, which is used  in  both
     VCOSQF and VCOSQB.

SYNOPSIS

     SUBROUTINE VCOSQI(N, WSAVE)

     INTEGER N
     REAL WSAVE(*)

     SUBROUTINE VCOSQI_64(N, WSAVE)

     INTEGER*8 N
     REAL WSAVE(*)

  F95 INTERFACE
     SUBROUTINE VCOSQI(N, WSAVE)

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

     SUBROUTINE VCOSQI_64(N, WSAVE)

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

  C INTERFACE
     #include <sunperf.h>

     void vcosqi(int n, float *wsave);

     void vcosqi_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)
               On entry, an array of dimension (2 * N  +  15)  or
               greater.   VCOSQI  needs to be called only once to
               initialize  WSAVE  before  calling  VCOSQF  and/or
               VCOSQB  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.