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cmf4kf.F

Last change on this file was 2759, checked in by aslmd, 2 years ago
adding unmodified code from WRFV3.0.1.1, expurged from useless data +1M size
File size: 4.8 KB

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1	!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
2	!
3	! FFTPACK 5.0
4	! Copyright (C) 1995-2004, Scientific Computing Division,
5	! University Corporation for Atmospheric Research
6	! Licensed under the GNU General Public License (GPL)
7	!
8	! Authors: Paul N. Swarztrauber and Richard A. Valent
9	!
10	! $Id: cmf4kf.f,v 1.2 2004/06/15 21:08:32 rodney Exp $
11	!
12	!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
13
14	SUBROUTINE CMF4KF (LOT,IDO,L1,NA,CC,IM1,IN1,CH,IM2,IN2,WA)
15	REAL CC(2,IN1,L1,IDO,4),CH(2,IN2,L1,4,IDO),WA(IDO,3,2)
16	!
17	! FFTPACK 5.0 auxiliary routine
18	!
19	M1D = (LOT-1)*IM1+1
20	M2S = 1-IM2
21	IF (IDO .GT. 1) GO TO 102
22	SN = 1./REAL(4*L1)
23	IF (NA .EQ. 1) GO TO 106
24	DO 101 K=1,L1
25	DO 101 M1=1,M1D,IM1
26	TI1 = CC(2,M1,K,1,1)-CC(2,M1,K,1,3)
27	TI2 = CC(2,M1,K,1,1)+CC(2,M1,K,1,3)
28	TR4 = CC(2,M1,K,1,2)-CC(2,M1,K,1,4)
29	TI3 = CC(2,M1,K,1,2)+CC(2,M1,K,1,4)
30	TR1 = CC(1,M1,K,1,1)-CC(1,M1,K,1,3)
31	TR2 = CC(1,M1,K,1,1)+CC(1,M1,K,1,3)
32	TI4 = CC(1,M1,K,1,4)-CC(1,M1,K,1,2)
33	TR3 = CC(1,M1,K,1,2)+CC(1,M1,K,1,4)
34	CC(1,M1,K,1,1) = SN*(TR2+TR3)
35	CC(1,M1,K,1,3) = SN*(TR2-TR3)
36	CC(2,M1,K,1,1) = SN*(TI2+TI3)
37	CC(2,M1,K,1,3) = SN*(TI2-TI3)
38	CC(1,M1,K,1,2) = SN*(TR1+TR4)
39	CC(1,M1,K,1,4) = SN*(TR1-TR4)
40	CC(2,M1,K,1,2) = SN*(TI1+TI4)
41	CC(2,M1,K,1,4) = SN*(TI1-TI4)
42	101 CONTINUE
43	RETURN
44	106 DO 107 K=1,L1
45	M2 = M2S
46	DO 107 M1=1,M1D,IM1
47	M2 = M2+IM2
48	TI1 = CC(2,M1,K,1,1)-CC(2,M1,K,1,3)
49	TI2 = CC(2,M1,K,1,1)+CC(2,M1,K,1,3)
50	TR4 = CC(2,M1,K,1,2)-CC(2,M1,K,1,4)
51	TI3 = CC(2,M1,K,1,2)+CC(2,M1,K,1,4)
52	TR1 = CC(1,M1,K,1,1)-CC(1,M1,K,1,3)
53	TR2 = CC(1,M1,K,1,1)+CC(1,M1,K,1,3)
54	TI4 = CC(1,M1,K,1,4)-CC(1,M1,K,1,2)
55	TR3 = CC(1,M1,K,1,2)+CC(1,M1,K,1,4)
56	CH(1,M2,K,1,1) = SN*(TR2+TR3)
57	CH(1,M2,K,3,1) = SN*(TR2-TR3)
58	CH(2,M2,K,1,1) = SN*(TI2+TI3)
59	CH(2,M2,K,3,1) = SN*(TI2-TI3)
60	CH(1,M2,K,2,1) = SN*(TR1+TR4)
61	CH(1,M2,K,4,1) = SN*(TR1-TR4)
62	CH(2,M2,K,2,1) = SN*(TI1+TI4)
63	CH(2,M2,K,4,1) = SN*(TI1-TI4)
64	107 CONTINUE
65	RETURN
66	102 DO 103 K=1,L1
67	M2 = M2S
68	DO 103 M1=1,M1D,IM1
69	M2 = M2+IM2
70	TI1 = CC(2,M1,K,1,1)-CC(2,M1,K,1,3)
71	TI2 = CC(2,M1,K,1,1)+CC(2,M1,K,1,3)
72	TR4 = CC(2,M1,K,1,2)-CC(2,M1,K,1,4)
73	TI3 = CC(2,M1,K,1,2)+CC(2,M1,K,1,4)
74	TR1 = CC(1,M1,K,1,1)-CC(1,M1,K,1,3)
75	TR2 = CC(1,M1,K,1,1)+CC(1,M1,K,1,3)
76	TI4 = CC(1,M1,K,1,4)-CC(1,M1,K,1,2)
77	TR3 = CC(1,M1,K,1,2)+CC(1,M1,K,1,4)
78	CH(1,M2,K,1,1) = TR2+TR3
79	CH(1,M2,K,3,1) = TR2-TR3
80	CH(2,M2,K,1,1) = TI2+TI3
81	CH(2,M2,K,3,1) = TI2-TI3
82	CH(1,M2,K,2,1) = TR1+TR4
83	CH(1,M2,K,4,1) = TR1-TR4
84	CH(2,M2,K,2,1) = TI1+TI4
85	CH(2,M2,K,4,1) = TI1-TI4
86	103 CONTINUE
87	DO 105 I=2,IDO
88	DO 104 K=1,L1
89	M2 = M2S
90	DO 104 M1=1,M1D,IM1
91	M2 = M2+IM2
92	TI1 = CC(2,M1,K,I,1)-CC(2,M1,K,I,3)
93	TI2 = CC(2,M1,K,I,1)+CC(2,M1,K,I,3)
94	TI3 = CC(2,M1,K,I,2)+CC(2,M1,K,I,4)
95	TR4 = CC(2,M1,K,I,2)-CC(2,M1,K,I,4)
96	TR1 = CC(1,M1,K,I,1)-CC(1,M1,K,I,3)
97	TR2 = CC(1,M1,K,I,1)+CC(1,M1,K,I,3)
98	TI4 = CC(1,M1,K,I,4)-CC(1,M1,K,I,2)
99	TR3 = CC(1,M1,K,I,2)+CC(1,M1,K,I,4)
100	CH(1,M2,K,1,I) = TR2+TR3
101	CR3 = TR2-TR3
102	CH(2,M2,K,1,I) = TI2+TI3
103	CI3 = TI2-TI3
104	CR2 = TR1+TR4
105	CR4 = TR1-TR4
106	CI2 = TI1+TI4
107	CI4 = TI1-TI4
108	CH(1,M2,K,2,I) = WA(I,1,1)CR2+WA(I,1,2)CI2
109	CH(2,M2,K,2,I) = WA(I,1,1)CI2-WA(I,1,2)CR2
110	CH(1,M2,K,3,I) = WA(I,2,1)CR3+WA(I,2,2)CI3
111	CH(2,M2,K,3,I) = WA(I,2,1)CI3-WA(I,2,2)CR3
112	CH(1,M2,K,4,I) = WA(I,3,1)CR4+WA(I,3,2)CI4
113	CH(2,M2,K,4,I) = WA(I,3,1)CI4-WA(I,3,2)CR4
114	104 CONTINUE
115	105 END DO
116	RETURN
117	END

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