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!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
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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: cmf5kb_8.ftn,v 1.4 2011/11/29 15:44:44 armaanl Exp $
C
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
SUBROUTINE CMF5KB_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,5),CH(2,IN2,L1,5,IDO),WA(IDO,4,2)
real*8 TR11,TI11,TR12,TI12
DATA TR11,TI11,TR12,TI12 /.3090169943749474,.9510565162951536,
1-.8090169943749474,.5877852522924731/
real*8 TI5,TI2,TI4,TI3,TR5,TR2,TR4,TR3,CHOLD1,CHOLD2
real*8 CR2,CI2,CR3,CI3,CR5,CI5,CR4,CI4
real*8 DR3,DR4,DI3,DI4,DR5,DR2,DI5,DI2
C
C FFTPACK 5.0 auxiliary routine
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
TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
CHOLD1 = CC(1,M1,K,1,1)+TR2+TR3
CHOLD2 = CC(2,M1,K,1,1)+TI2+TI3
CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
CC(1,M1,K,1,1) = CHOLD1
CC(2,M1,K,1,1) = CHOLD2
CR5 = TI11*TR5+TI12*TR4
CI5 = TI11*TI5+TI12*TI4
CR4 = TI12*TR5-TI11*TR4
CI4 = TI12*TI5-TI11*TI4
CC(1,M1,K,1,2) = CR2-CI5
CC(1,M1,K,1,5) = CR2+CI5
CC(2,M1,K,1,2) = CI2+CR5
CC(2,M1,K,1,3) = CI3+CR4
CC(1,M1,K,1,3) = CR3-CI4
CC(1,M1,K,1,4) = CR3+CI4
CC(2,M1,K,1,4) = CI3-CR4
CC(2,M1,K,1,5) = CI2-CR5
101 CONTINUE
RETURN
102 DO 103 K=1,L1
M2 = M2S
DO 103 M1=1,M1D,IM1
M2 = M2+IM2
TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
CH(1,M2,K,1,1) = CC(1,M1,K,1,1)+TR2+TR3
CH(2,M2,K,1,1) = CC(2,M1,K,1,1)+TI2+TI3
CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
CR5 = TI11*TR5+TI12*TR4
CI5 = TI11*TI5+TI12*TI4
CR4 = TI12*TR5-TI11*TR4
CI4 = TI12*TI5-TI11*TI4
CH(1,M2,K,2,1) = CR2-CI5
CH(1,M2,K,5,1) = CR2+CI5
CH(2,M2,K,2,1) = CI2+CR5
CH(2,M2,K,3,1) = CI3+CR4
CH(1,M2,K,3,1) = CR3-CI4
CH(1,M2,K,4,1) = CR3+CI4
CH(2,M2,K,4,1) = CI3-CR4
CH(2,M2,K,5,1) = CI2-CR5
103 CONTINUE
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
TI5 = CC(2,M1,K,I,2)-CC(2,M1,K,I,5)
TI2 = CC(2,M1,K,I,2)+CC(2,M1,K,I,5)
TI4 = CC(2,M1,K,I,3)-CC(2,M1,K,I,4)
TI3 = CC(2,M1,K,I,3)+CC(2,M1,K,I,4)
TR5 = CC(1,M1,K,I,2)-CC(1,M1,K,I,5)
TR2 = CC(1,M1,K,I,2)+CC(1,M1,K,I,5)
TR4 = CC(1,M1,K,I,3)-CC(1,M1,K,I,4)
TR3 = CC(1,M1,K,I,3)+CC(1,M1,K,I,4)
CH(1,M2,K,1,I) = CC(1,M1,K,I,1)+TR2+TR3
CH(2,M2,K,1,I) = CC(2,M1,K,I,1)+TI2+TI3
CR2 = CC(1,M1,K,I,1)+TR11*TR2+TR12*TR3
CI2 = CC(2,M1,K,I,1)+TR11*TI2+TR12*TI3
CR3 = CC(1,M1,K,I,1)+TR12*TR2+TR11*TR3
CI3 = CC(2,M1,K,I,1)+TR12*TI2+TR11*TI3
CR5 = TI11*TR5+TI12*TR4
CI5 = TI11*TI5+TI12*TI4
CR4 = TI12*TR5-TI11*TR4
CI4 = TI12*TI5-TI11*TI4
DR3 = CR3-CI4
DR4 = CR3+CI4
DI3 = CI3+CR4
DI4 = CI3-CR4
DR5 = CR2+CI5
DR2 = CR2-CI5
DI5 = CI2-CR5
DI2 = CI2+CR5
CH(1,M2,K,2,I) = WA(I,1,1)*DR2-WA(I,1,2)*DI2
CH(2,M2,K,2,I) = WA(I,1,1)*DI2+WA(I,1,2)*DR2
CH(1,M2,K,3,I) = WA(I,2,1)*DR3-WA(I,2,2)*DI3
CH(2,M2,K,3,I) = WA(I,2,1)*DI3+WA(I,2,2)*DR3
CH(1,M2,K,4,I) = WA(I,3,1)*DR4-WA(I,3,2)*DI4
CH(2,M2,K,4,I) = WA(I,3,1)*DI4+WA(I,3,2)*DR4
CH(1,M2,K,5,I) = WA(I,4,1)*DR5-WA(I,4,2)*DI5
CH(2,M2,K,5,I) = WA(I,4,1)*DI5+WA(I,4,2)*DR5
104 CONTINUE
105 CONTINUE
RETURN
END