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
|
C
C SPDX-License-Identifier: BSD-3-Clause
C
* MB04FD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX
PARAMETER ( NMAX = 50 )
INTEGER LDA, LDB, LDDE, LDFG, LDQ, LDWORK
PARAMETER ( LDA = NMAX/2, LDB = NMAX/2, LDDE = NMAX/2,
$ LDFG = NMAX/2, LDQ = NMAX, LDWORK =
$ 3*NMAX*NMAX/4 )
*
* .. Local Scalars ..
CHARACTER COMPQ, JOB
INTEGER I, INFO, J, N
*
* .. Local Arrays ..
DOUBLE PRECISION A( LDA, NMAX/2 ), ALPHAI( NMAX/2 ),
$ ALPHAR( NMAX/2 ), B( LDB, NMAX/2 ),
$ BETA( NMAX/2 ), DE( LDDE, NMAX/2+1 ),
$ DWORK( LDWORK ), FG( LDFG, NMAX/2+1 ),
$ Q( LDQ, NMAX )
INTEGER IWORK( NMAX/2+1 )
*
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
*
* .. External Subroutines ..
EXTERNAL MB04FD
*
* .. Intrinsic Functions ..
INTRINSIC MOD
*
* .. Executable statements ..
*
WRITE( NOUT, FMT = 99999 )
*
* Skip first line in data file.
*
READ( NIN, FMT = * )
READ( NIN, FMT = * ) JOB, COMPQ, N
READ( NIN, FMT = * ) ( ( A( I, J ), J = 1, N/2 ), I = 1, N/2 )
READ( NIN, FMT = * ) ( ( DE( I, J ), J = 1, N/2+1 ), I = 1, N/2 )
READ( NIN, FMT = * ) ( ( B( I, J ), J = 1, N/2 ), I = 1, N/2 )
READ( NIN, FMT = * ) ( ( FG( I, J ), J = 1, N/2+1 ), I = 1, N/2 )
IF( LSAME( COMPQ, 'U' ) )
$ READ( NIN, FMT = * ) ( ( Q( I, J ), J = 1, N ), I = 1, N )
IF( N.LT.0 .OR. N.GT.NMAX .OR. MOD( N, 2 ).NE.0 ) THEN
WRITE( NOUT, FMT = 99998 ) N
ELSE
*
* Test of MB04FD.
*
CALL MB04FD( JOB, COMPQ, N, A, LDA, DE, LDDE, B, LDB, FG, LDFG,
$ Q, LDQ, ALPHAR, ALPHAI, BETA, IWORK, DWORK,
$ LDWORK, INFO )
IF( INFO.NE.0 ) THEN
WRITE( NOUT, FMT = 99997 ) INFO
ELSE
IF( LSAME( JOB, 'T' ) ) THEN
WRITE( NOUT, FMT = 99996 )
DO 10 I = 1, N/2
WRITE( NOUT, FMT = 99995 ) ( A( I, J ), J = 1, N/2 )
10 CONTINUE
END IF
WRITE( NOUT, FMT = 99994 )
DO 20 I = 1, N/2
WRITE( NOUT, FMT = 99995 ) ( DE( I, J ), J = 1, N/2+1 )
20 CONTINUE
IF( LSAME( JOB, 'T' ) ) THEN
WRITE( NOUT, FMT = 99993 )
DO 30 I = 1, N/2
WRITE( NOUT, FMT = 99995 ) ( B( I, J ), J = 1, N/2 )
30 CONTINUE
END IF
WRITE( NOUT, FMT = 99992 )
DO 40 I = 1, N/2
WRITE( NOUT, FMT = 99995 ) ( FG( I, J ), J = 1, N/2+1 )
40 CONTINUE
IF( .NOT.LSAME( COMPQ, 'N' ) ) THEN
WRITE( NOUT, FMT = 99991 )
DO 50 I = 1, N
WRITE( NOUT, FMT = 99995 ) ( Q( I, J ), J = 1, N )
50 CONTINUE
END IF
WRITE( NOUT, FMT = 99990 )
WRITE( NOUT, FMT = 99995 ) ( ALPHAR(I), I = 1, N/2 )
WRITE( NOUT, FMT = 99995 ) ( ALPHAI(I), I = 1, N/2 )
WRITE( NOUT, FMT = 99995 ) ( BETA(I), I = 1, N/2 )
END IF
END IF
STOP
99999 FORMAT ( 'MB04FD EXAMPLE PROGRAM RESULTS', 1X )
99998 FORMAT ( 'N is out of range.', /, 'N = ', I5 )
99997 FORMAT ( 'INFO on exit from MB04FD = ', I2 )
99996 FORMAT (/' The transformed matrix A is' )
99995 FORMAT ( 51( 1X, F8.4 ) )
99994 FORMAT (/' The transformed matrix DE is' )
99993 FORMAT (/' The transformed matrix B is' )
99992 FORMAT (/' The transformed matrix FG is' )
99991 FORMAT (/' The transformed matrix Q is ' )
99990 FORMAT (/' The real, imaginary, and beta parts of eigenvalues are'
$ )
END
|
