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C
C Copyright (c) 1997 Silvano Bonazzola
C
C This file is part of LORENE.
C
C LORENE is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C
C LORENE is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public License
C along with LORENE; if not, write to the Free Software
C Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
C
C
subroutine dir1ms(n,n64,ind,cs,cc)
implicit double precision(a-h,o-z)
c
c routine pour la multiplication et la division
c de n64 fonctions par r. (div (par) r (avec resolution
c f(in) a l'origine
c
c arguments de la routine:
c
c n =nombrede degres de liberte-1
c cas contraire.
c ind =parametre: si mult=1 la multiplication par x est
c effectuee si mult=-1 la division est effectuee.
c n64 =n64 est le nombre de fonctions qui doivent etre
c divisees (ou multipliees) par x
c cs =tableau contenant le n+1 coefficients de tcheby-
c tchev de la fonction qui doit etre divisee ou
c multipliee par x.
c cc =tableau contenant les coeff. de la fonction divisee.
c les dimensions des tableaux cc et cs doibent
c etre > (n64+1)*n1
c
C
C $Id: dir1ms.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $
C $Log: dir1ms.f,v $
C Revision 1.2 2012/03/30 12:12:43 j_novak
C Cleaning of fortran files
C
C Revision 1.1.1.1 2001/11/20 15:19:30 e_gourgoulhon
C LORENE
C
c Revision 1.2 1997/05/23 11:29:46 hyc
c *** empty log message ***
c
C
C $Header: /cvsroot/Lorene/F77/Source/Poisson2d/dir1ms.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $
C
C
character*120 header
data header/'$Header: /cvsroot/Lorene/F77/Source/Poisson2d/dir1ms.f,v 1.2 2012/03/30 12:12:43 j_novak Exp $'/
dimension cs(*),cc(*),y(513)
n1=n+1
if(n64.gt.513) then
print*,'dimensions insuff. dans la routine dir1ms, n64=',n64
endif
c
n0=n-1
n65=n64
if((n64/8)*8.eq.n64) n65=n64+1
n63=n64-1
n064=(n-2)*n65+1
nn64=n064+n65
n164=nn64+n65
c
if(ind.eq.1) then
c
c on effectue la multiplication
c
do 13 j=1,n64
cc(j)=cs(j)-cs(j+n65)
13 continue
c
jm1=n65+1
jm2=jm1+n63
do 1 l=2,n0
do 2 m=jm1,jm2
cc(m)=cs(m)-(cs(m+n65)+cs(m-n65))*.5
2 continue
jm1=jm1+n65
jm2=jm1+n63
1 continue
do 5 m=nn64,nn64+n63
cc(m)=cs(m)-cs(m-n65)*.5
5 continue
c
do 6 m=nn64,nn64+n63
cc(m+n65)=-cs(m)
6 continue
return
endif
c
c on effectue la division
c
if(ind.eq.-1) then
c
jm1=n65+1
jm2=jm1+n63
do 3 l=1,n0
do 7 m=jm1,jm2
cc(m)=cs(m-n65)+2*cs(m)
7 continue
do 8 m=jm1,jm2
cs(m)=cc(m)
8 continue
jm1=jm1+n65
jm2=jm1+n63
3 continue
c
do 9 m=n164,n164+n63
cc(m)=0
9 continue
c
do 10 m=nn64,nn64+n63
cc(m)=cs(m)
10 continue
c
jm1=n064-1
jm2=nn64-1
do 4 ll=2,n
do 11 m=1,n64
y(m)=cs(m+jm1)+cc(m+jm2)
11 continue
c
do 12 m=1,n64
cc(m+jm1)=y(m)
12 continue
c
jm2=jm1
jm1=jm1-n65
4 continue
endif
100 format(1x,10e11.3)
101 format(1x,' ')
return
end
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