| 1 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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| 2 | ! |
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| 3 | ! FFTPACK 5.0 |
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| 4 | ! Copyright (C) 1995-2004, Scientific Computing Division, |
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| 5 | ! University Corporation for Atmospheric Research |
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| 6 | ! Licensed under the GNU General Public License (GPL) |
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| 7 | ! |
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| 8 | ! Authors: Paul N. Swarztrauber and Richard A. Valent |
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| 9 | ! |
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| 10 | ! $Id: cmf5kb.f,v 1.2 2004/06/15 21:08:32 rodney Exp $ |
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| 11 | ! |
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| 12 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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| 13 | |
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| 14 | SUBROUTINE CMF5KB (LOT,IDO,L1,NA,CC,IM1,IN1,CH,IM2,IN2,WA) |
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| 15 | REAL CC(2,IN1,L1,IDO,5),CH(2,IN2,L1,5,IDO),WA(IDO,4,2) |
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| 16 | DATA TR11,TI11,TR12,TI12 /.3090169943749474,.9510565162951536, & |
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| 17 | &-.8090169943749474,.5877852522924731/ |
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| 18 | ! |
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| 19 | ! FFTPACK 5.0 auxiliary routine |
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| 20 | ! |
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| 21 | M1D = (LOT-1)*IM1+1 |
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| 22 | M2S = 1-IM2 |
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| 23 | IF (IDO.GT.1 .OR. NA.EQ.1) GO TO 102 |
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| 24 | DO 101 K=1,L1 |
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| 25 | DO 101 M1=1,M1D,IM1 |
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| 26 | TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5) |
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| 27 | TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5) |
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| 28 | TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4) |
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| 29 | TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4) |
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| 30 | TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5) |
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| 31 | TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5) |
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| 32 | TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4) |
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| 33 | TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4) |
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| 34 | CHOLD1 = CC(1,M1,K,1,1)+TR2+TR3 |
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| 35 | CHOLD2 = CC(2,M1,K,1,1)+TI2+TI3 |
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| 36 | CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3 |
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| 37 | CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3 |
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| 38 | CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3 |
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| 39 | CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3 |
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| 40 | CC(1,M1,K,1,1) = CHOLD1 |
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| 41 | CC(2,M1,K,1,1) = CHOLD2 |
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| 42 | CR5 = TI11*TR5+TI12*TR4 |
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| 43 | CI5 = TI11*TI5+TI12*TI4 |
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| 44 | CR4 = TI12*TR5-TI11*TR4 |
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| 45 | CI4 = TI12*TI5-TI11*TI4 |
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| 46 | CC(1,M1,K,1,2) = CR2-CI5 |
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| 47 | CC(1,M1,K,1,5) = CR2+CI5 |
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| 48 | CC(2,M1,K,1,2) = CI2+CR5 |
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| 49 | CC(2,M1,K,1,3) = CI3+CR4 |
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| 50 | CC(1,M1,K,1,3) = CR3-CI4 |
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| 51 | CC(1,M1,K,1,4) = CR3+CI4 |
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| 52 | CC(2,M1,K,1,4) = CI3-CR4 |
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| 53 | CC(2,M1,K,1,5) = CI2-CR5 |
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| 54 | 101 CONTINUE |
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| 55 | RETURN |
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| 56 | 102 DO 103 K=1,L1 |
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| 57 | M2 = M2S |
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| 58 | DO 103 M1=1,M1D,IM1 |
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| 59 | M2 = M2+IM2 |
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| 60 | TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5) |
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| 61 | TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5) |
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| 62 | TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4) |
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| 63 | TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4) |
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| 64 | TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5) |
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| 65 | TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5) |
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| 66 | TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4) |
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| 67 | TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4) |
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| 68 | CH(1,M2,K,1,1) = CC(1,M1,K,1,1)+TR2+TR3 |
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| 69 | CH(2,M2,K,1,1) = CC(2,M1,K,1,1)+TI2+TI3 |
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| 70 | CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3 |
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| 71 | CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3 |
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| 72 | CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3 |
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| 73 | CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3 |
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| 74 | CR5 = TI11*TR5+TI12*TR4 |
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| 75 | CI5 = TI11*TI5+TI12*TI4 |
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| 76 | CR4 = TI12*TR5-TI11*TR4 |
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| 77 | CI4 = TI12*TI5-TI11*TI4 |
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| 78 | CH(1,M2,K,2,1) = CR2-CI5 |
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| 79 | CH(1,M2,K,5,1) = CR2+CI5 |
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| 80 | CH(2,M2,K,2,1) = CI2+CR5 |
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| 81 | CH(2,M2,K,3,1) = CI3+CR4 |
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| 82 | CH(1,M2,K,3,1) = CR3-CI4 |
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| 83 | CH(1,M2,K,4,1) = CR3+CI4 |
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| 84 | CH(2,M2,K,4,1) = CI3-CR4 |
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| 85 | CH(2,M2,K,5,1) = CI2-CR5 |
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| 86 | 103 CONTINUE |
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| 87 | IF(IDO .EQ. 1) RETURN |
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| 88 | DO 105 I=2,IDO |
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| 89 | DO 104 K=1,L1 |
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| 90 | M2 = M2S |
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| 91 | DO 104 M1=1,M1D,IM1 |
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| 92 | M2 = M2+IM2 |
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| 93 | TI5 = CC(2,M1,K,I,2)-CC(2,M1,K,I,5) |
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| 94 | TI2 = CC(2,M1,K,I,2)+CC(2,M1,K,I,5) |
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| 95 | TI4 = CC(2,M1,K,I,3)-CC(2,M1,K,I,4) |
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| 96 | TI3 = CC(2,M1,K,I,3)+CC(2,M1,K,I,4) |
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| 97 | TR5 = CC(1,M1,K,I,2)-CC(1,M1,K,I,5) |
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| 98 | TR2 = CC(1,M1,K,I,2)+CC(1,M1,K,I,5) |
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| 99 | TR4 = CC(1,M1,K,I,3)-CC(1,M1,K,I,4) |
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| 100 | TR3 = CC(1,M1,K,I,3)+CC(1,M1,K,I,4) |
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| 101 | CH(1,M2,K,1,I) = CC(1,M1,K,I,1)+TR2+TR3 |
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| 102 | CH(2,M2,K,1,I) = CC(2,M1,K,I,1)+TI2+TI3 |
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| 103 | CR2 = CC(1,M1,K,I,1)+TR11*TR2+TR12*TR3 |
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| 104 | CI2 = CC(2,M1,K,I,1)+TR11*TI2+TR12*TI3 |
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| 105 | CR3 = CC(1,M1,K,I,1)+TR12*TR2+TR11*TR3 |
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| 106 | CI3 = CC(2,M1,K,I,1)+TR12*TI2+TR11*TI3 |
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| 107 | CR5 = TI11*TR5+TI12*TR4 |
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| 108 | CI5 = TI11*TI5+TI12*TI4 |
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| 109 | CR4 = TI12*TR5-TI11*TR4 |
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| 110 | CI4 = TI12*TI5-TI11*TI4 |
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| 111 | DR3 = CR3-CI4 |
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| 112 | DR4 = CR3+CI4 |
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| 113 | DI3 = CI3+CR4 |
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| 114 | DI4 = CI3-CR4 |
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| 115 | DR5 = CR2+CI5 |
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| 116 | DR2 = CR2-CI5 |
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| 117 | DI5 = CI2-CR5 |
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| 118 | DI2 = CI2+CR5 |
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| 119 | CH(1,M2,K,2,I) = WA(I,1,1)*DR2-WA(I,1,2)*DI2 |
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| 120 | CH(2,M2,K,2,I) = WA(I,1,1)*DI2+WA(I,1,2)*DR2 |
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| 121 | CH(1,M2,K,3,I) = WA(I,2,1)*DR3-WA(I,2,2)*DI3 |
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| 122 | CH(2,M2,K,3,I) = WA(I,2,1)*DI3+WA(I,2,2)*DR3 |
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| 123 | CH(1,M2,K,4,I) = WA(I,3,1)*DR4-WA(I,3,2)*DI4 |
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| 124 | CH(2,M2,K,4,I) = WA(I,3,1)*DI4+WA(I,3,2)*DR4 |
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| 125 | CH(1,M2,K,5,I) = WA(I,4,1)*DR5-WA(I,4,2)*DI5 |
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| 126 | CH(2,M2,K,5,I) = WA(I,4,1)*DI5+WA(I,4,2)*DR5 |
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| 127 | 104 CONTINUE |
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| 128 | 105 END DO |
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| 129 | RETURN |
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| 130 | END |
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