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
|
/* laso/dmvpc.f -- translated by f2c (version 20050501).
You must link the resulting object file with libf2c:
on Microsoft Windows system, link with libf2c.lib;
on Linux or Unix systems, link with .../path/to/libf2c.a -lm
or, if you install libf2c.a in a standard place, with -lf2c -lm
-- in that order, at the end of the command line, as in
cc *.o -lf2c -lm
Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
http://www.netlib.org/f2c/libf2c.zip
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "v3p_netlib.h"
/* Table of constant values */
static integer c__1 = 1;
/* ------------------------------------------------------------------ */
/*< >*/
/* Subroutine */ int dmvpc_(integer *nblock, doublereal *bet, integer *maxj,
integer *j, doublereal *s, integer *number, doublereal *resnrm,
doublereal *orthcf, doublereal *rv)
{
/* System generated locals */
integer bet_dim1, bet_offset, s_dim1, s_offset, i__1, i__2;
doublereal d__1, d__2, d__3;
/* Local variables */
integer i__, k, m;
extern doublereal ddot_(integer *, doublereal *, integer *, doublereal *,
integer *), dnrm2_(integer *, doublereal *, integer *);
/*< INTEGER NBLOCK, MAXJ, J, NUMBER >*/
/*< >*/
/* THIS SUBROUTINE COMPUTES THE NORM AND THE SMALLEST ELEMENT */
/* (IN ABSOLUTE VALUE) OF THE VECTOR BET*SJI, WHERE SJI */
/* IS AN NBLOCK VECTOR OF THE LAST NBLOCK ELEMENTS OF THE ITH */
/* EIGENVECTOR OF T. THESE QUANTITIES ARE THE RESIDUAL NORM */
/* AND THE ORTHOGONALITY COEFFICIENT RESPECTIVELY FOR THE */
/* CORRESPONDING RITZ PAIR. THE ORTHOGONALITY COEFFICIENT IS */
/* NORMALIZED TO ACCOUNT FOR THE LOCAL REORTHOGONALIZATION. */
/*< INTEGER I, K, M >*/
/*< DOUBLE PRECISION DDOT, DNRM2, DABS, DMIN1 >*/
/*< M = J - NBLOCK + 1 >*/
/* Parameter adjustments */
bet_dim1 = *nblock;
bet_offset = 1 + bet_dim1;
bet -= bet_offset;
s_dim1 = *maxj;
s_offset = 1 + s_dim1;
s -= s_offset;
--resnrm;
--orthcf;
--rv;
/* Function Body */
m = *j - *nblock + 1;
/*< DO 20 I=1,NUMBER >*/
i__1 = *number;
for (i__ = 1; i__ <= i__1; ++i__) {
/*< DO 10 K=1,NBLOCK >*/
i__2 = *nblock;
for (k = 1; k <= i__2; ++k) {
/*< RV(K) = DDOT(NBLOCK,S(M,I),1,BET(K,1),NBLOCK) >*/
rv[k] = ddot_(nblock, &s[m + i__ * s_dim1], &c__1, &bet[k +
bet_dim1], nblock);
/*< IF (K.EQ.1) ORTHCF(I) = DABS(RV(K)) >*/
if (k == 1) {
orthcf[i__] = (d__1 = rv[k], abs(d__1));
}
/*< ORTHCF(I) = DMIN1(ORTHCF(I),DABS(RV(K))) >*/
/* Computing MIN */
d__2 = orthcf[i__], d__3 = (d__1 = rv[k], abs(d__1));
orthcf[i__] = min(d__2,d__3);
/*< 10 CONTINUE >*/
/* L10: */
}
/*< RESNRM(I) = DNRM2(NBLOCK,RV,1) >*/
resnrm[i__] = dnrm2_(nblock, &rv[1], &c__1);
/*< 20 CONTINUE >*/
/* L20: */
}
/*< RETURN >*/
return 0;
/*< END >*/
} /* dmvpc_ */
#ifdef __cplusplus
}
#endif
|
