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mradb2.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: mradb2.f,v 1.2 2004/06/15 21:29:19 rodney Exp $
8	!
9	!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
10
11	SUBROUTINE MRADB2 (M,IDO,L1,CC,IM1,IN1,CH,IM2,IN2,WA1)
12	REAL CC(IN1,IDO,2,L1), CH(IN2,IDO,L1,2), WA1(IDO)
13	!
14	M1D = (M-1)*IM1+1
15	M2S = 1-IM2
16	DO 101 K=1,L1
17	M2 = M2S
18	DO 1001 M1=1,M1D,IM1
19	M2 = M2+IM2
20	CH(M2,1,K,1) = CC(M1,1,1,K)+CC(M1,IDO,2,K)
21	CH(M2,1,K,2) = CC(M1,1,1,K)-CC(M1,IDO,2,K)
22	1001 CONTINUE
23	101 END DO
24	IF (IDO-2) 107,105,102
25	102 IDP2 = IDO+2
26	DO 104 K=1,L1
27	DO 103 I=3,IDO,2
28	IC = IDP2-I
29	M2 = M2S
30	DO 1002 M1=1,M1D,IM1
31	M2 = M2+IM2
32	CH(M2,I-1,K,1) = CC(M1,I-1,1,K)+CC(M1,IC-1,2,K)
33	CH(M2,I,K,1) = CC(M1,I,1,K)-CC(M1,IC,2,K)
34	CH(M2,I-1,K,2) = WA1(I-2)*(CC(M1,I-1,1,K)-CC(M1,IC-1,2,K)) &
35	& -WA1(I-1)*(CC(M1,I,1,K)+CC(M1,IC,2,K))
36	CH(M2,I,K,2) = WA1(I-2)*(CC(M1,I,1,K)+CC(M1,IC,2,K))+WA1(I-1) &
37	& *(CC(M1,I-1,1,K)-CC(M1,IC-1,2,K))
38	1002 CONTINUE
39	103 CONTINUE
40	104 END DO
41	IF (MOD(IDO,2) .EQ. 1) RETURN
42	105 DO 106 K=1,L1
43	M2 = M2S
44	DO 1003 M1=1,M1D,IM1
45	M2 = M2+IM2
46	CH(M2,IDO,K,1) = CC(M1,IDO,1,K)+CC(M1,IDO,1,K)
47	CH(M2,IDO,K,2) = -(CC(M1,1,2,K)+CC(M1,1,2,K))
48	1003 CONTINUE
49	106 END DO
50	107 RETURN
51	END

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