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c1f2kf.F @ 1

Last change on this file since 1 was 1, checked in by lfita, 10 years ago

WRF: version v3.3
LMDZ: version v1818

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1	!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
2	!
3	! FFTPACK 5.0
4	!
5	! Authors: Paul N. Swarztrauber and Richard A. Valent
6	!
7	! $Id: c1f2kf.f,v 1.2 2004/06/15 21:08:32 rodney Exp $
8	!
9	!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
10
11	SUBROUTINE C1F2KF (IDO,L1,NA,CC,IN1,CH,IN2,WA)
12	REAL CC(IN1,L1,IDO,2),CH(IN2,L1,2,IDO),WA(IDO,1,2)
13	!
14	IF (IDO .GT. 1) GO TO 102
15	SN = 1./REAL(2*L1)
16	IF (NA .EQ. 1) GO TO 106
17	DO 101 K=1,L1
18	CHOLD1 = SN*(CC(1,K,1,1)+CC(1,K,1,2))
19	CC(1,K,1,2) = SN*(CC(1,K,1,1)-CC(1,K,1,2))
20	CC(1,K,1,1) = CHOLD1
21	CHOLD2 = SN*(CC(2,K,1,1)+CC(2,K,1,2))
22	CC(2,K,1,2) = SN*(CC(2,K,1,1)-CC(2,K,1,2))
23	CC(2,K,1,1) = CHOLD2
24	101 END DO
25	RETURN
26	106 DO 107 K=1,L1
27	CH(1,K,1,1) = SN*(CC(1,K,1,1)+CC(1,K,1,2))
28	CH(1,K,2,1) = SN*(CC(1,K,1,1)-CC(1,K,1,2))
29	CH(2,K,1,1) = SN*(CC(2,K,1,1)+CC(2,K,1,2))
30	CH(2,K,2,1) = SN*(CC(2,K,1,1)-CC(2,K,1,2))
31	107 END DO
32	RETURN
33	102 DO 103 K=1,L1
34	CH(1,K,1,1) = CC(1,K,1,1)+CC(1,K,1,2)
35	CH(1,K,2,1) = CC(1,K,1,1)-CC(1,K,1,2)
36	CH(2,K,1,1) = CC(2,K,1,1)+CC(2,K,1,2)
37	CH(2,K,2,1) = CC(2,K,1,1)-CC(2,K,1,2)
38	103 END DO
39	DO 105 I=2,IDO
40	DO 104 K=1,L1
41	CH(1,K,1,I) = CC(1,K,I,1)+CC(1,K,I,2)
42	TR2 = CC(1,K,I,1)-CC(1,K,I,2)
43	CH(2,K,1,I) = CC(2,K,I,1)+CC(2,K,I,2)
44	TI2 = CC(2,K,I,1)-CC(2,K,I,2)
45	CH(2,K,2,I) = WA(I,1,1)TI2-WA(I,1,2)TR2
46	CH(1,K,2,I) = WA(I,1,1)TR2+WA(I,1,2)TI2
47	104 CONTINUE
48	105 END DO
49	RETURN
50	END

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