!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
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!See the above mentioned License/Disclaimer for more details.
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!
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C
C FFTPACK 5.0
C Copyright (C) 1995-2004, Scientific Computing Division,
C University Corporation for Atmospheric Research
C Licensed under the GNU General Public License (GPL)
C
C Authors: Paul N. Swarztrauber and Richard A. Valent
C
C $Id: cmf2kb_8.ftn,v 1.2 2010/08/20 16:39:32 armaanl Exp $
C
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SUBROUTINE CMF2KB_8 (LOT,IDO,L1,NA,CC,IM1,IN1,CH,IM2,IN2,WA) 2
IMPLICIT NONE
#include "taglam4d.cdk"
integer m2s,m1d,in2,k,i,m2,m1,l1,ido,lot,na,im2,in1,im1
REAL*8 CC(2,IN1,L1,IDO,2),CH(2,IN2,L1,2,IDO),WA(IDO,1,2)
real*8 CHOLD1,CHOLD2,TR2,TI2
C
M1D = (LOT-1)*IM1+1
M2S = 1-IM2
IF (IDO.GT.1 .OR. NA.EQ.1) GO TO 102
DO 101 K=1,L1
DO 101 M1=1,M1D,IM1
CHOLD1 = CC(1,M1,K,1,1)+CC(1,M1,K,1,2)
CC(1,M1,K,1,2) = CC(1,M1,K,1,1)-CC(1,M1,K,1,2)
CC(1,M1,K,1,1) = CHOLD1
CHOLD2 = CC(2,M1,K,1,1)+CC(2,M1,K,1,2)
CC(2,M1,K,1,2) = CC(2,M1,K,1,1)-CC(2,M1,K,1,2)
CC(2,M1,K,1,1) = CHOLD2
! print *,'CMF2KB_8: M1, IN1=',M1,IN1
! print *,'CMF2KB_8: K, L1=',K,L1
101 CONTINUE
RETURN
102 DO 103 K=1,L1
M2 = M2S
DO 103 M1=1,M1D,IM1
M2 = M2+IM2
! if(M2.GT.IN2) print *,'CMF2KB_8: M2> IN2',M2,IN2
! if(K.GT.L1) print *,'CMF2KB_8: K> L1',K,L1
CH(1,M2,K,1,1) = CC(1,M1,K,1,1)+CC(1,M1,K,1,2)
CH(1,M2,K,2,1) = CC(1,M1,K,1,1)-CC(1,M1,K,1,2)
CH(2,M2,K,1,1) = CC(2,M1,K,1,1)+CC(2,M1,K,1,2)
CH(2,M2,K,2,1) = CC(2,M1,K,1,1)-CC(2,M1,K,1,2)
103 CONTINUE
! print *,'CMF2KB_8: Branch 2 Active'
! print *,'CMF2KB_8: LOT,IDO,L1,NA,IM1,IN1,IM2,IN2=',
! & LOT,IDO,L1,NA,IM1,IN1,IM2,IN2
IF(IDO .EQ. 1) RETURN
DO 105 I=2,IDO
DO 104 K=1,L1
M2 = M2S
DO 104 M1=1,M1D,IM1
M2 = M2+IM2
CH(1,M2,K,1,I) = CC(1,M1,K,I,1)+CC(1,M1,K,I,2)
TR2 = CC(1,M1,K,I,1)-CC(1,M1,K,I,2)
CH(2,M2,K,1,I) = CC(2,M1,K,I,1)+CC(2,M1,K,I,2)
TI2 = CC(2,M1,K,I,1)-CC(2,M1,K,I,2)
CH(2,M2,K,2,I) = WA(I,1,1)*TI2+WA(I,1,2)*TR2
CH(1,M2,K,2,I) = WA(I,1,1)*TR2-WA(I,1,2)*TI2
104 CONTINUE
105 CONTINUE
RETURN
END