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
|
/* dlarscl2.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"
#include "blaswrap.h"
/* Subroutine */ int dlarscl2_(integer *m, integer *n, doublereal *d__,
doublereal *x, integer *ldx)
{
/* System generated locals */
integer x_dim1, x_offset, i__1, i__2;
/* Local variables */
integer i__, j;
/* -- LAPACK routine (version 3.2.1) -- */
/* -- Contributed by James Demmel, Deaglan Halligan, Yozo Hida and -- */
/* -- Jason Riedy of Univ. of California Berkeley. -- */
/* -- April 2009 -- */
/* -- LAPACK is a software package provided by Univ. of Tennessee, -- */
/* -- Univ. of California Berkeley and NAG Ltd. -- */
/* .. */
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* DLARSCL2 performs a reciprocal diagonal scaling on an vector: */
/* x <-- inv(D) * x */
/* where the diagonal matrix D is stored as a vector. */
/* Eventually to be replaced by BLAS_dge_diag_scale in the new BLAS */
/* standard. */
/* Arguments */
/* ========= */
/* M (input) INTEGER */
/* The number of rows of D and X. M >= 0. */
/* N (input) INTEGER */
/* The number of columns of D and X. N >= 0. */
/* D (input) DOUBLE PRECISION array, length M */
/* Diagonal matrix D, stored as a vector of length M. */
/* X (input/output) DOUBLE PRECISION array, dimension (LDX,N) */
/* On entry, the vector X to be scaled by D. */
/* On exit, the scaled vector. */
/* LDX (input) INTEGER */
/* The leading dimension of the vector X. LDX >= 0. */
/* ===================================================================== */
/* .. Local Scalars .. */
/* .. */
/* .. Executable Statements .. */
/* Parameter adjustments */
--d__;
x_dim1 = *ldx;
x_offset = 1 + x_dim1;
x -= x_offset;
/* Function Body */
i__1 = *n;
for (j = 1; j <= i__1; ++j) {
i__2 = *m;
for (i__ = 1; i__ <= i__2; ++i__) {
x[i__ + j * x_dim1] /= d__[i__];
}
}
return 0;
} /* dlarscl2_ */
|
