1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
C
C SPDX-License-Identifier: BSD-3-Clause
C
* MB04BD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX
PARAMETER ( NMAX = 50 )
INTEGER LDA, LDB, LDC1, LDC2, LDDE, LDF, LDQ1, LDQ2,
$ LDVW, LDWORK, LIWORK
PARAMETER ( LDA = NMAX/2, LDB = NMAX/2, LDC1 = NMAX/2,
$ LDC2 = NMAX/2, LDDE = NMAX/2, LDF = NMAX/2,
$ LDQ1 = NMAX, LDQ2 = NMAX, LDVW = NMAX/2,
$ LDWORK = 2*NMAX*NMAX + MAX( 4*NMAX, 36 ),
$ LIWORK = MAX( NMAX + 12, 2*NMAX + 3 ) )
*
* .. Local Scalars ..
CHARACTER COMPQ1, COMPQ2, JOB
INTEGER I, INFO, J, M, N
*
* .. Local Arrays ..
INTEGER IWORK( LIWORK )
DOUBLE PRECISION A( LDA, NMAX/2 ), ALPHAI( NMAX/2 ),
$ ALPHAR( NMAX/2 ), B( LDB, NMAX/2 ),
$ BETA( NMAX/2 ), C1( LDC1, NMAX/2 ),
$ C2( LDC2, NMAX/2 ), DE( LDDE, NMAX/2+1 ),
$ DWORK( LDWORK ), F( LDF, NMAX/2 ),
$ Q1( LDQ1, NMAX ), Q2( LDQ2, NMAX ),
$ VW( LDVW, NMAX/2+1 )
*
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
*
* .. External Subroutines ..
EXTERNAL MB04BD
*
* .. Intrinsic Functions ..
INTRINSIC MAX
*
* .. Executable Statements ..
*
WRITE( NOUT, FMT = 99999 )
* Skip the heading in the data file and read in the data.
READ( NIN, FMT = * )
READ( NIN, FMT = * ) JOB, COMPQ1, COMPQ2, N
IF( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE( NOUT, FMT = 99998 ) N
ELSE
M = N/2
READ( NIN, FMT = * ) ( ( A( I, J ), J = 1, M ), I = 1, M )
READ( NIN, FMT = * ) ( ( DE( I, J ), J = 1, M+1 ), I = 1, M )
READ( NIN, FMT = * ) ( ( C1( I, J ), J = 1, M ), I = 1, M )
READ( NIN, FMT = * ) ( ( VW( I, J ), J = 1, M+1 ), I = 1, M )
* Compute the eigenvalues of a real skew-Hamiltonian/Hamiltonian
* pencil.
CALL MB04BD( JOB, COMPQ1, COMPQ2, N, A, LDA, DE, LDDE, C1,
$ LDC1, VW, LDVW, Q1, LDQ1, Q2, LDQ2, B, LDB, F,
$ LDF, C2, LDC2, ALPHAR, ALPHAI, BETA, IWORK,
$ LIWORK, DWORK, LDWORK, INFO )
*
IF( INFO.NE.0 ) THEN
WRITE( NOUT, FMT = 99997 ) INFO
ELSE
WRITE( NOUT, FMT = 99996 )
DO 10 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( A( I, J ), J = 1, M )
10 CONTINUE
WRITE( NOUT, FMT = 99994 )
DO 20 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( DE( I, J ), J = 2, M+1 )
20 CONTINUE
WRITE( NOUT, FMT = 99993 )
DO 30 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( B( I, J ), J = 1, M )
30 CONTINUE
WRITE( NOUT, FMT = 99992 )
DO 40 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( F( I, J ), J = 1, M )
40 CONTINUE
WRITE( NOUT, FMT = 99991 )
DO 50 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( C1( I, J ), J = 1, M )
50 CONTINUE
WRITE( NOUT, FMT = 99990 )
DO 60 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( C2( I, J ), J = 1, M )
60 CONTINUE
WRITE( NOUT, FMT = 99989 )
DO 70 I = 1, M
WRITE( NOUT, FMT = 99995 ) ( VW( I, J ), J = 2, M+1 )
70 CONTINUE
WRITE( NOUT, FMT = 99988 )
WRITE( NOUT, FMT = 99995 ) ( ALPHAR( I ), I = 1, M )
WRITE( NOUT, FMT = 99987 )
WRITE( NOUT, FMT = 99995 ) ( ALPHAI( I ), I = 1, M )
WRITE( NOUT, FMT = 99986 )
WRITE( NOUT, FMT = 99995 ) ( BETA( I ), I = 1, M )
WRITE( NOUT, FMT = 99985 )
IF( .NOT.LSAME( COMPQ1, 'N' ) ) THEN
DO 80 I = 1, N
WRITE( NOUT, FMT = 99995 ) ( Q1( I, J ), J = 1, N )
80 CONTINUE
END IF
IF( .NOT.LSAME( COMPQ2, 'N' ) ) THEN
WRITE( NOUT, FMT = 99984 )
DO 90 I = 1, N
WRITE( NOUT, FMT = 99995 ) ( Q2( I, J ), J = 1, N )
90 CONTINUE
END IF
END IF
END IF
STOP
*
99999 FORMAT( 'MB04BD EXAMPLE PROGRAM RESULTS', 1X )
99998 FORMAT( 'N is out of range.', /, 'N = ', I5 )
99997 FORMAT( 'INFO on exit from MB04BD = ', I2 )
99996 FORMAT( 'The matrix A on exit is ' )
99995 FORMAT( 50( 1X, F8.4 ) )
99994 FORMAT( 'The matrix D on exit is ' )
99993 FORMAT( 'The matrix B on exit is ' )
99992 FORMAT( 'The matrix F on exit is ' )
99991 FORMAT( 'The matrix C1 on exit is ' )
99990 FORMAT( 'The matrix C2 on exit is ' )
99989 FORMAT( 'The matrix V on exit is ' )
99988 FORMAT( 'The vector ALPHAR is ' )
99987 FORMAT( 'The vector ALPHAI is ' )
99986 FORMAT( 'The vector BETA is ' )
99985 FORMAT( 'The matrix Q1 is ' )
99984 FORMAT( 'The matrix Q2 is ' )
END
|
