| 1 | ! |
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| 2 | ! $Header$ |
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| 3 | ! |
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| 4 | SUBROUTINE inifgn(dv) |
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| 5 | c |
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| 6 | c ... H.Upadyaya , O.Sharma ... |
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| 7 | c |
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| 8 | IMPLICIT NONE |
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| 9 | c |
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| 10 | #include "dimensions.h" |
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| 11 | #include "paramet.h" |
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| 12 | #include "comgeom.h" |
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| 13 | #include "serre.h" |
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| 14 | |
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| 15 | c |
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| 16 | REAL vec(iim,iim),vec1(iim,iim) |
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| 17 | REAL dlonu(iim),dlonv(iim) |
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| 18 | REAL du(iim),dv(iim),d(iim) |
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| 19 | REAL pi |
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| 20 | INTEGER i,j,k,imm1,nrot |
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| 21 | C |
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| 22 | #include "coefils.h" |
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| 23 | c |
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| 24 | EXTERNAL SSUM, acc,eigen,jacobi |
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| 25 | REAL SSUM |
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| 26 | c |
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| 27 | |
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| 28 | imm1 = iim -1 |
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| 29 | pi = 2.* ASIN(1.) |
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| 30 | C |
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| 31 | DO 5 i=1,iim |
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| 32 | dlonu(i)= xprimu( i ) |
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| 33 | dlonv(i)= xprimv( i ) |
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| 34 | 5 CONTINUE |
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| 35 | |
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| 36 | DO 12 i=1,iim |
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| 37 | sddv(i) = SQRT(dlonv(i)) |
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| 38 | sddu(i) = SQRT(dlonu(i)) |
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| 39 | unsddu(i) = 1./sddu(i) |
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| 40 | unsddv(i) = 1./sddv(i) |
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| 41 | 12 CONTINUE |
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| 42 | C |
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| 43 | DO 17 j=1,iim |
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| 44 | DO 17 i=1,iim |
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| 45 | vec(i,j) = 0. |
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| 46 | vec1(i,j) = 0. |
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| 47 | eignfnv(i,j) = 0. |
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| 48 | eignfnu(i,j) = 0. |
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| 49 | 17 CONTINUE |
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| 50 | c |
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| 51 | c |
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| 52 | eignfnv(1,1) = -1. |
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| 53 | eignfnv(iim,1) = 1. |
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| 54 | DO 20 i=1,imm1 |
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| 55 | eignfnv(i+1,i+1)= -1. |
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| 56 | eignfnv(i,i+1) = 1. |
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| 57 | 20 CONTINUE |
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| 58 | DO 25 j=1,iim |
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| 59 | DO 25 i=1,iim |
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| 60 | eignfnv(i,j) = eignfnv(i,j)/(sddu(i)*sddv(j)) |
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| 61 | 25 CONTINUE |
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| 62 | DO 30 j=1,iim |
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| 63 | DO 30 i=1,iim |
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| 64 | eignfnu(i,j) = -eignfnv(j,i) |
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| 65 | 30 CONTINUE |
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| 66 | c |
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| 67 | #ifdef CRAY |
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| 68 | CALL MXM(eignfnu,iim,eignfnv,iim,vec ,iim) |
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| 69 | CALL MXM(eignfnv,iim,eignfnu,iim,vec1,iim) |
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| 70 | #else |
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| 71 | DO j = 1, iim |
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| 72 | DO i = 1, iim |
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| 73 | vec (i,j) = 0.0 |
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| 74 | vec1(i,j) = 0.0 |
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| 75 | DO k = 1, iim |
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| 76 | vec (i,j) = vec(i,j) + eignfnu(i,k) * eignfnv(k,j) |
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| 77 | vec1(i,j) = vec1(i,j) + eignfnv(i,k) * eignfnu(k,j) |
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| 78 | ENDDO |
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| 79 | ENDDO |
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| 80 | ENDDO |
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| 81 | #endif |
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| 82 | |
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| 83 | c |
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| 84 | CALL jacobi(vec,iim,iim,dv,eignfnv,nrot) |
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| 85 | CALL acc(eignfnv,d,iim) |
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| 86 | CALL eigen_sort(dv,eignfnv,iim,iim) |
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| 87 | c |
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| 88 | CALL jacobi(vec1,iim,iim,du,eignfnu,nrot) |
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| 89 | CALL acc(eignfnu,d,iim) |
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| 90 | CALL eigen_sort(du,eignfnu,iim,iim) |
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| 91 | |
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| 92 | cc ancienne version avec appels IMSL |
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| 93 | c |
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| 94 | c CALL MXM(eignfnu,iim,eignfnv,iim,vec,iim) |
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| 95 | c CALL MXM(eignfnv,iim,eignfnu,iim,vec1,iim) |
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| 96 | c CALL EVCSF(iim,vec,iim,dv,eignfnv,iim) |
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| 97 | c CALL acc(eignfnv,d,iim) |
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| 98 | c CALL eigen(eignfnv,dv) |
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| 99 | c |
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| 100 | c CALL EVCSF(iim,vec1,iim,du,eignfnu,iim) |
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| 101 | c CALL acc(eignfnu,d,iim) |
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| 102 | c CALL eigen(eignfnu,du) |
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| 103 | |
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| 104 | RETURN |
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| 105 | END |
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| 106 | |
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