r1f2kf
C R1F2KF SOURCE BP208322 18/10/08 21:15:09 9952 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC C C FFTPACK 5.1 C C Authors: Paul N. Swarztrauber and Richard A. Valent C CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC IMPLICIT INTEGER(I-N) IMPLICIT REAL*8(A-H,O-Z) C DO 101 K=1,L1 CH(1,1,1,K) = CC(1,1,K,1)+CC(1,1,K,2) CH(1,IDO,2,K) = CC(1,1,K,1)-CC(1,1,K,2) 101 CONTINUE IF (IDO-2) 107,105,102 102 IDP2 = IDO+2 DO 104 K=1,L1 DO 103 I=3,IDO,2 IC = IDP2-I CH(1,I,1,K) = CC(1,I,K,1)+(WA1(I-2)*CC(1,I,K,2)- 1 WA1(I-1)*CC(1,I-1,K,2)) CH(1,IC,2,K) = (WA1(I-2)*CC(1,I,K,2)-WA1(I-1)* 1 CC(1,I-1,K,2))-CC(1,I,K,1) CH(1,I-1,1,K) = CC(1,I-1,K,1)+(WA1(I-2)*CC(1,I-1,K,2)+ 1 WA1(I-1)*CC(1,I,K,2)) CH(1,IC-1,2,K) = CC(1,I-1,K,1)-(WA1(I-2)*CC(1,I-1,K,2)+ 1 WA1(I-1)*CC(1,I,K,2)) 103 CONTINUE 104 CONTINUE IF (MOD(IDO,2) .EQ. 1) RETURN 105 DO 106 K=1,L1 CH(1,1,2,K) = -CC(1,IDO,K,2) CH(1,IDO,1,K) = CC(1,IDO,K,1) 106 CONTINUE 107 RETURN END
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