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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/* ../SRC/dsconv.f -- translated by f2c (version 20061008).
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
*/
#include "f2c.h"
/* Common Block Declarations */
struct {
integer logfil, ndigit, mgetv0, msaupd, msaup2, msaitr, mseigt, msapps,
msgets, mseupd, mnaupd, mnaup2, mnaitr, mneigh, mnapps, mngets,
mneupd, mcaupd, mcaup2, mcaitr, mceigh, mcapps, mcgets, mceupd;
} debug_;
#define debug_1 debug_
struct {
integer nopx, nbx, nrorth, nitref, nrstrt;
real tsaupd, tsaup2, tsaitr, tseigt, tsgets, tsapps, tsconv, tnaupd,
tnaup2, tnaitr, tneigh, tngets, tnapps, tnconv, tcaupd, tcaup2,
tcaitr, tceigh, tcgets, tcapps, tcconv, tmvopx, tmvbx, tgetv0,
titref, trvec;
} timing_;
#define timing_1 timing_
/* Table of constant values */
static doublereal c_b3 = .66666666666666663;
/* ----------------------------------------------------------------------- */
/* \BeginDoc */
/* \Name: dsconv */
/* \Description: */
/* Convergence testing for the symmetric Arnoldi eigenvalue routine. */
/* \Usage: */
/* call dsconv */
/* ( N, RITZ, BOUNDS, TOL, NCONV ) */
/* \Arguments */
/* N Integer. (INPUT) */
/* Number of Ritz values to check for convergence. */
/* RITZ Double precision array of length N. (INPUT) */
/* The Ritz values to be checked for convergence. */
/* BOUNDS Double precision array of length N. (INPUT) */
/* Ritz estimates associated with the Ritz values in RITZ. */
/* TOL Double precision scalar. (INPUT) */
/* Desired relative accuracy for a Ritz value to be considered */
/* "converged". */
/* NCONV Integer scalar. (OUTPUT) */
/* Number of "converged" Ritz values. */
/* \EndDoc */
/* ----------------------------------------------------------------------- */
/* \BeginLib */
/* \Routines called: */
/* second ARPACK utility routine for timing. */
/* dlamch LAPACK routine that determines machine constants. */
/* \Author */
/* Danny Sorensen Phuong Vu */
/* Richard Lehoucq CRPC / Rice University */
/* Dept. of Computational & Houston, Texas */
/* Applied Mathematics */
/* Rice University */
/* Houston, Texas */
/* \SCCS Information: @(#) */
/* FILE: sconv.F SID: 2.4 DATE OF SID: 4/19/96 RELEASE: 2 */
/* \Remarks */
/* 1. Starting with version 2.4, this routine no longer uses the */
/* Parlett strategy using the gap conditions. */
/* \EndLib */
/* ----------------------------------------------------------------------- */
/* Subroutine */ int dsconv_(integer *n, doublereal *ritz, doublereal *bounds,
doublereal *tol, integer *nconv)
{
/* System generated locals */
integer i__1;
doublereal d__1, d__2, d__3;
/* Builtin functions */
double pow_dd(doublereal *, doublereal *);
/* Local variables */
static integer i__;
static real t0, t1;
static doublereal eps23, temp;
extern doublereal dlamch_(char *, ftnlen);
extern /* Subroutine */ int second_(real *);
/* %----------------------------------------------------% */
/* | Include files for debugging and timing information | */
/* %----------------------------------------------------% */
/* \SCCS Information: @(#) */
/* FILE: debug.h SID: 2.3 DATE OF SID: 11/16/95 RELEASE: 2 */
/* %---------------------------------% */
/* | See debug.doc for documentation | */
/* %---------------------------------% */
/* %------------------% */
/* | Scalar Arguments | */
/* %------------------% */
/* %--------------------------------% */
/* | See stat.doc for documentation | */
/* %--------------------------------% */
/* \SCCS Information: @(#) */
/* FILE: stat.h SID: 2.2 DATE OF SID: 11/16/95 RELEASE: 2 */
/* %-----------------% */
/* | Array Arguments | */
/* %-----------------% */
/* %---------------% */
/* | Local Scalars | */
/* %---------------% */
/* %-------------------% */
/* | External routines | */
/* %-------------------% */
/* %---------------------% */
/* | Intrinsic Functions | */
/* %---------------------% */
/* %-----------------------% */
/* | Executable Statements | */
/* %-----------------------% */
/* Parameter adjustments */
--bounds;
--ritz;
/* Function Body */
second_(&t0);
eps23 = dlamch_("Epsilon-Machine", (ftnlen)15);
eps23 = pow_dd(&eps23, &c_b3);
*nconv = 0;
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
/* %-----------------------------------------------------% */
/* | The i-th Ritz value is considered "converged" | */
/* | when: bounds(i) .le. TOL*max(eps23, abs(ritz(i))) | */
/* %-----------------------------------------------------% */
/* Computing MAX */
d__2 = eps23, d__3 = (d__1 = ritz[i__], abs(d__1));
temp = max(d__2,d__3);
if (bounds[i__] <= *tol * temp) {
++(*nconv);
}
/* L10: */
}
second_(&t1);
timing_1.tsconv += t1 - t0;
return 0;
/* %---------------% */
/* | End of dsconv | */
/* %---------------% */
} /* dsconv_ */
|
