| 1 | SUBROUTINE RMMAQ( ISEED,ISEQ,CHOPT )
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| 2 |
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| 3 | C-----------------------------------------------------------------------
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| 4 | C R(ANDO)M (NUMBER GENERATOR OF) MA(RSAGLIA TYPE INITIALISATION)
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| 5 | C
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| 6 | C ROUTINE FOR INITIALIZATION OF RMMAR
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| 7 | C THIS SUBROUTINE IS CALLED FROM MAIN AND START
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| 8 | C ARGUMENTS:
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| 9 | C ISEED = SEED TO INITIALIZE A SEQUENCE
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| 10 | C ISEQ = # OF RANDOM SEQUENCE
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| 11 | C CHOPT = CHARACTER TO STEER INITIALIZATION OPTIONS
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| 12 | C
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| 13 | C CERN PROGLIB# V113 RMMAQ .VERSION KERNFOR 1.0
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| 14 | C ORIG. 01/03/89 FCA + FJ
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| 15 | C-----------------------------------------------------------------------
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| 16 |
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| 17 | COMMON /RANMA2/ IU(1030),JSEQ
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| 18 | COMMON /RANMA3/ TWOM24,TWOM48,CD,CM,CINT,MODCNS
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| 19 | INTEGER I97(0:1030),J97(0:1030),NTOT(0:1030),NTOT2(0:1030),
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| 20 | * IJKL(0:1030)
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| 21 | REAL U(1030),C(0:1030),UU(1030)
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| 22 | EQUIVALENCE (IJKL(0),IU(1)),(NTOT(0),IU(2)),(NTOT2(0),IU(3))
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| 23 | EQUIVALENCE (U(1),IU(4)),(C(0),IU(101)),(I97(0),IU(102))
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| 24 | EQUIVALENCE (J97(0),IU(103))
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| 25 | INTEGER ISEED(*)
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| 26 | CHARACTER CHOPT*(*), CCHOPT*12
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| 27 | LOGICAL FIRST
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| 28 | DATA FIRST / .TRUE. /
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| 29 | C-----------------------------------------------------------------------
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| 30 |
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| 31 | IF ( FIRST ) THEN
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| 32 | TWOM24 = 2.**(-24)
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| 33 | TWOM48 = 2.**(-48)
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| 34 | CD = 7654321.*TWOM24
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| 35 | CM = 16777213.*TWOM24
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| 36 | CINT = 362436.*TWOM24
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| 37 | MODCNS = 1000000000
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| 38 | FIRST = .FALSE.
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| 39 | ENDIF
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| 40 |
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| 41 | CCHOPT = CHOPT
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| 42 | IF ( CCHOPT .EQ. ' ' ) THEN
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| 43 | ISEED(1) = 54217137
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| 44 | ISEED(2) = 0
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| 45 | ISEED(3) = 0
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| 46 | CCHOPT = 'S'
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| 47 | JSEQ = 1
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| 48 | ENDIF
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| 49 |
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| 50 | IF ( INDEX(CCHOPT,'S') .NE. 0 ) THEN
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| 51 | IF ( ISEQ .GT. 0 ) JSEQ = ISEQ
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| 52 | IBASE = (JSEQ-1)*103
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| 53 | IF ( INDEX(CCHOPT,'V') .NE. 0 ) THEN
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| 54 | DO 10 JJ = 1,103
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| 55 | IU(IBASE+JJ) = ISEED(JJ)
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| 56 | 10 CONTINUE
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| 57 | ELSE
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| 58 | IJKL(IBASE) = ISEED(1)
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| 59 | NTOT(IBASE) = ISEED(2)
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| 60 | NTOT2(IBASE) = ISEED(3)
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| 61 | IJ = IJKL(IBASE) / 30082
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| 62 | KL = IJKL(IBASE) - 30082*IJ
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| 63 | I = MOD(IJ/177, 177) + 2
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| 64 | J = MOD(IJ, 177) + 2
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| 65 | K = MOD(KL/169, 178) + 1
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| 66 | L = MOD(KL, 169)
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| 67 | DO 30 II = 1,97
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| 68 | S = 0.
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| 69 | T = .5
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| 70 | DO 20 JJ = 1,24
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| 71 | M = MOD(MOD(I*J,179)*K, 179)
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| 72 | I = J
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| 73 | J = K
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| 74 | K = M
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| 75 | L = MOD(53*L+1, 169)
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| 76 | IF ( MOD(L*M,64) .GE. 32 ) S = S+T
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| 77 | T = 0.5*T
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| 78 | 20 CONTINUE
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| 79 | UU(II) = S
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| 80 | 30 CONTINUE
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| 81 | CC = CINT
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| 82 | II97 = 97
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| 83 | IJ97 = 33
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| 84 | C COMPLETE INITIALIZATION BY SKIPPING (NTOT2*MODCNS+NTOT) RANDOMNUMBERS
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| 85 | NITER = MODCNS
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| 86 | DO 50 LOOP2 = 1,NTOT2(IBASE)+1
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| 87 | IF ( LOOP2 .GT.N TOT2(IBASE) ) NITER = NTOT(IBASE)
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| 88 | DO 40 IDUM = 1,NITER
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| 89 | UNI = UU(II97)-UU(IJ97)
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| 90 | IF ( UNI .LT. 0. ) UNI = UNI+1.
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| 91 | UU(II97) = UNI
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| 92 | II97 = II97-1
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| 93 | IF ( II97 .EQ. 0 ) II97 = 97
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| 94 | IJ97 = IJ97-1
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| 95 | IF ( IJ97 .EQ. 0 ) IJ97 = 97
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| 96 | CC = CC - CD
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| 97 | IF ( CC .LT. 0. ) CC = CC+CM
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| 98 | 40 CONTINUE
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| 99 | 50 CONTINUE
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| 100 | I97(IBASE) = II97
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| 101 | J97(IBASE) = IJ97
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| 102 | C(IBASE) = CC
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| 103 | DO 60 JJ = 1,97
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| 104 | U(IBASE+JJ) = UU(JJ)
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| 105 | 60 CONTINUE
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| 106 | ENDIF
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| 107 | ELSEIF ( INDEX(CCHOPT,'R') .NE. 0 ) THEN
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| 108 | IF ( ISEQ .GT. 0 ) THEN
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| 109 | JSEQ = ISEQ
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| 110 | ELSE
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| 111 | ISEQ = JSEQ
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| 112 | ENDIF
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| 113 | IBASE = (JSEQ-1)*103
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| 114 | IF ( INDEX(CCHOPT,'V') .NE. 0 ) THEN
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| 115 | NCOPY = 103
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| 116 | ELSE
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| 117 | NCOPY = 3
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| 118 | ENDIF
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| 119 | DO 70 JJ = 1,NCOPY
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| 120 | ISEED(JJ) = IU(IBASE+JJ)
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| 121 | 70 CONTINUE
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| 122 | ENDIF
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| 123 | RETURN
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| 124 | END
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