!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
!
! FFTPACK 5.0
!
! Authors: Paul N. Swarztrauber and Richard A. Valent
!
! $Id: r1f5kb.f,v 1.2 2004/06/15 21:29:20 rodney Exp $
!
!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
SUBROUTINE R1F5KB (IDO,L1,CC,IN1,CH,IN2, &
& WA1,WA2,WA3,WA4)
REAL CC(IN1,IDO,5,L1) ,CH(IN2,IDO,L1,5), &
& WA1(IDO) ,WA2(IDO) ,WA3(IDO) ,WA4(IDO)
!
ARG=2.*4.*ATAN(1.0)/5.
TR11=COS(ARG)
TI11=SIN(ARG)
TR12=COS(2.*ARG)
TI12=SIN(2.*ARG)
DO 101 K=1,L1
CH(1,1,K,1) = CC(1,1,1,K)+2.*CC(1,IDO,2,K)+2.*CC(1,IDO,4,K)
CH(1,1,K,2) = (CC(1,1,1,K)+TR11*2.*CC(1,IDO,2,K) &
& +TR12*2.*CC(1,IDO,4,K))-(TI11*2.*CC(1,1,3,K) &
& +TI12*2.*CC(1,1,5,K))
CH(1,1,K,3) = (CC(1,1,1,K)+TR12*2.*CC(1,IDO,2,K) &
& +TR11*2.*CC(1,IDO,4,K))-(TI12*2.*CC(1,1,3,K) &
& -TI11*2.*CC(1,1,5,K))
CH(1,1,K,4) = (CC(1,1,1,K)+TR12*2.*CC(1,IDO,2,K) &
& +TR11*2.*CC(1,IDO,4,K))+(TI12*2.*CC(1,1,3,K) &
& -TI11*2.*CC(1,1,5,K))
CH(1,1,K,5) = (CC(1,1,1,K)+TR11*2.*CC(1,IDO,2,K) &
& +TR12*2.*CC(1,IDO,4,K))+(TI11*2.*CC(1,1,3,K) &
& +TI12*2.*CC(1,1,5,K))
101 END DO
IF (IDO .EQ. 1) RETURN
IDP2 = IDO+2
DO 103 K=1,L1
DO 102 I=3,IDO,2
IC = IDP2-I
CH(1,I-1,K,1) = CC(1,I-1,1,K)+(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +(CC(1,I-1,5,K)+CC(1,IC-1,4,K))
CH(1,I,K,1) = CC(1,I,1,K)+(CC(1,I,3,K)-CC(1,IC,2,K)) &
& +(CC(1,I,5,K)-CC(1,IC,4,K))
CH(1,I-1,K,2) = WA1(I-2)*((CC(1,I-1,1,K)+TR11* &
& (CC(1,I-1,3,K)+CC(1,IC-1,2,K))+TR12 &
& *(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))-(TI11*(CC(1,I,3,K) &
& +CC(1,IC,2,K))+TI12*(CC(1,I,5,K)+CC(1,IC,4,K)))) &
& -WA1(I-1)*((CC(1,I,1,K)+TR11*(CC(1,I,3,K)-CC(1,IC,2,K)) &
& +TR12*(CC(1,I,5,K)-CC(1,IC,4,K)))+(TI11*(CC(1,I-1,3,K) &
& -CC(1,IC-1,2,K))+TI12*(CC(1,I-1,5,K)-CC(1,IC-1,4,K))))
CH(1,I,K,2) = WA1(I-2)*((CC(1,I,1,K)+TR11*(CC(1,I,3,K) &
& -CC(1,IC,2,K))+TR12*(CC(1,I,5,K)-CC(1,IC,4,K))) &
& +(TI11*(CC(1,I-1,3,K)-CC(1,IC-1,2,K))+TI12 &
& *(CC(1,I-1,5,K)-CC(1,IC-1,4,K))))+WA1(I-1) &
& *((CC(1,I-1,1,K)+TR11*(CC(1,I-1,3,K) &
& +CC(1,IC-1,2,K))+TR12*(CC(1,I-1,5,K)+CC(1,IC-1,4,K))) &
& -(TI11*(CC(1,I,3,K)+CC(1,IC,2,K))+TI12 &
& *(CC(1,I,5,K)+CC(1,IC,4,K))))
CH(1,I-1,K,3) = WA2(I-2) &
& *((CC(1,I-1,1,K)+TR12*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR11*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))-(TI12*(CC(1,I,3,K) &
& +CC(1,IC,2,K))-TI11*(CC(1,I,5,K)+CC(1,IC,4,K)))) &
& -WA2(I-1) &
& *((CC(1,I,1,K)+TR12*(CC(1,I,3,K)- &
& CC(1,IC,2,K))+TR11*(CC(1,I,5,K)-CC(1,IC,4,K))) &
& +(TI12*(CC(1,I-1,3,K)-CC(1,IC-1,2,K))-TI11 &
& *(CC(1,I-1,5,K)-CC(1,IC-1,4,K))))
CH(1,I,K,3) = WA2(I-2) &
& *((CC(1,I,1,K)+TR12*(CC(1,I,3,K)- &
& CC(1,IC,2,K))+TR11*(CC(1,I,5,K)-CC(1,IC,4,K))) &
& +(TI12*(CC(1,I-1,3,K)-CC(1,IC-1,2,K))-TI11 &
& *(CC(1,I-1,5,K)-CC(1,IC-1,4,K)))) &
& +WA2(I-1) &
& *((CC(1,I-1,1,K)+TR12*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR11*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))-(TI12*(CC(1,I,3,K) &
& +CC(1,IC,2,K))-TI11*(CC(1,I,5,K)+CC(1,IC,4,K))))
CH(1,I-1,K,4) = WA3(I-2) &
& *((CC(1,I-1,1,K)+TR12*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR11*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))+(TI12*(CC(1,I,3,K) &
& +CC(1,IC,2,K))-TI11*(CC(1,I,5,K)+CC(1,IC,4,K)))) &
& -WA3(I-1) &
& *((CC(1,I,1,K)+TR12*(CC(1,I,3,K)- &
& CC(1,IC,2,K))+TR11*(CC(1,I,5,K)-CC(1,IC,4,K))) &
& -(TI12*(CC(1,I-1,3,K)-CC(1,IC-1,2,K))-TI11 &
& *(CC(1,I-1,5,K)-CC(1,IC-1,4,K))))
CH(1,I,K,4) = WA3(I-2) &
& *((CC(1,I,1,K)+TR12*(CC(1,I,3,K)- &
& CC(1,IC,2,K))+TR11*(CC(1,I,5,K)-CC(1,IC,4,K))) &
& -(TI12*(CC(1,I-1,3,K)-CC(1,IC-1,2,K))-TI11 &
& *(CC(1,I-1,5,K)-CC(1,IC-1,4,K)))) &
& +WA3(I-1) &
& *((CC(1,I-1,1,K)+TR12*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR11*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))+(TI12*(CC(1,I,3,K) &
& +CC(1,IC,2,K))-TI11*(CC(1,I,5,K)+CC(1,IC,4,K))))
CH(1,I-1,K,5) = WA4(I-2) &
& *((CC(1,I-1,1,K)+TR11*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR12*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))+(TI11*(CC(1,I,3,K) &
& +CC(1,IC,2,K))+TI12*(CC(1,I,5,K)+CC(1,IC,4,K)))) &
& -WA4(I-1) &
& *((CC(1,I,1,K)+TR11*(CC(1,I,3,K)-CC(1,IC,2,K)) &
& +TR12*(CC(1,I,5,K)-CC(1,IC,4,K)))-(TI11*(CC(1,I-1,3,K) &
& -CC(1,IC-1,2,K))+TI12*(CC(1,I-1,5,K)-CC(1,IC-1,4,K))))
CH(1,I,K,5) = WA4(I-2) &
& *((CC(1,I,1,K)+TR11*(CC(1,I,3,K)-CC(1,IC,2,K)) &
& +TR12*(CC(1,I,5,K)-CC(1,IC,4,K)))-(TI11*(CC(1,I-1,3,K) &
& -CC(1,IC-1,2,K))+TI12*(CC(1,I-1,5,K)-CC(1,IC-1,4,K)))) &
& +WA4(I-1) &
& *((CC(1,I-1,1,K)+TR11*(CC(1,I-1,3,K)+CC(1,IC-1,2,K)) &
& +TR12*(CC(1,I-1,5,K)+CC(1,IC-1,4,K)))+(TI11*(CC(1,I,3,K) &
& +CC(1,IC,2,K))+TI12*(CC(1,I,5,K)+CC(1,IC,4,K))))
102 CONTINUE
103 END DO
RETURN
END