1 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
4 ! Copyright (C) 1995-2004, Scientific Computing Division,
5 ! University Corporation for Atmospheric Research
6 ! Licensed under the GNU General Public License (GPL)
8 ! Authors: Paul N. Swarztrauber and Richard A. Valent
10 ! $Id: cosq1b.f,v 1.2 2004/06/15 21:08:32 rodney Exp $
12 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
14 SUBROUTINE COSQ1B (N, INC, X, LENX, WSAVE, LENSAV, &
16 INTEGER N, INC, LENX, LENSAV, LENWRK, IER
17 REAL X(INC,*), WSAVE(LENSAV), WORK(LENWRK)
21 IF (LENX .LT. INC*(N-1) + 1) THEN
23 CALL XERFFT ('COSQ1B', 6)
25 ELSEIF (LENSAV .LT. 2*N + INT(LOG(REAL(N))) +4) THEN
27 CALL XERFFT ('COSQ1B', 8)
29 ELSEIF (LENWRK .LT. N) THEN
31 CALL XERFFT ('COSQ1B', 10)
36 102 SSQRT2 = 1./SQRT(2.)
38 X(1,2) = SSQRT2*(X(1,1)-X(1,2))
41 103 CALL COSQB1 (N,INC,X,WSAVE,WORK,IER1)
44 CALL XERFFT ('COSQ1B',-5)