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
|
#include "f2c.h"
/* Subroutine */ int claset_(char *uplo, integer *m, integer *n, complex *
alpha, complex *beta, complex *a, integer *lda)
{
/* -- LAPACK auxiliary routine (version 2.0) --
Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
Courant Institute, Argonne National Lab, and Rice University
October 31, 1992
Purpose
=======
CLASET initializes a 2-D array A to BETA on the diagonal and
ALPHA on the offdiagonals.
Arguments
=========
UPLO (input) CHARACTER*1
Specifies the part of the matrix A to be set.
= 'U': Upper triangular part is set. The lower triangle
is unchanged.
= 'L': Lower triangular part is set. The upper triangle
is unchanged.
Otherwise: All of the matrix A is set.
M (input) INTEGER
On entry, M specifies the number of rows of A.
N (input) INTEGER
On entry, N specifies the number of columns of A.
ALPHA (input) COMPLEX
All the offdiagonal array elements are set to ALPHA.
BETA (input) COMPLEX
All the diagonal array elements are set to BETA.
A (input/output) COMPLEX array, dimension (LDA,N)
On entry, the m by n matrix A.
On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j;
A(i,i) = BETA , 1 <= i <= min(m,n)
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
=====================================================================
Parameter adjustments
Function Body */
/* System generated locals */
integer a_dim1, a_offset, i__1, i__2, i__3;
/* Local variables */
static integer i, j;
extern logical lsame_(char *, char *);
#define A(I,J) a[(I)-1 + ((J)-1)* ( *lda)]
if (lsame_(uplo, "U")) {
/* Set the diagonal to BETA and the strictly upper triangular
part of the array to ALPHA. */
i__1 = *n;
for (j = 2; j <= *n; ++j) {
/* Computing MIN */
i__3 = j - 1;
i__2 = min(i__3,*m);
for (i = 1; i <= min(j-1,*m); ++i) {
i__3 = i + j * a_dim1;
A(i,j).r = alpha->r, A(i,j).i = alpha->i;
/* L10: */
}
/* L20: */
}
i__1 = min(*n,*m);
for (i = 1; i <= min(*n,*m); ++i) {
i__2 = i + i * a_dim1;
A(i,i).r = beta->r, A(i,i).i = beta->i;
/* L30: */
}
} else if (lsame_(uplo, "L")) {
/* Set the diagonal to BETA and the strictly lower triangular
part of the array to ALPHA. */
i__1 = min(*m,*n);
for (j = 1; j <= min(*m,*n); ++j) {
i__2 = *m;
for (i = j + 1; i <= *m; ++i) {
i__3 = i + j * a_dim1;
A(i,j).r = alpha->r, A(i,j).i = alpha->i;
/* L40: */
}
/* L50: */
}
i__1 = min(*n,*m);
for (i = 1; i <= min(*n,*m); ++i) {
i__2 = i + i * a_dim1;
A(i,i).r = beta->r, A(i,i).i = beta->i;
/* L60: */
}
} else {
/* Set the array to BETA on the diagonal and ALPHA on the
offdiagonal. */
i__1 = *n;
for (j = 1; j <= *n; ++j) {
i__2 = *m;
for (i = 1; i <= *m; ++i) {
i__3 = i + j * a_dim1;
A(i,j).r = alpha->r, A(i,j).i = alpha->i;
/* L70: */
}
/* L80: */
}
i__1 = min(*m,*n);
for (i = 1; i <= min(*m,*n); ++i) {
i__2 = i + i * a_dim1;
A(i,i).r = beta->r, A(i,i).i = beta->i;
/* L90: */
}
}
return 0;
/* End of CLASET */
} /* claset_ */
|
