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
|
/*
-- MAGMA (version 2.9.0) --
Univ. of Tennessee, Knoxville
Univ. of California, Berkeley
Univ. of Colorado, Denver
@date January 2025
@generated from sparse/control/magma_zmatrixchar.cpp, normal z -> s, Wed Jan 22 14:42:25 2025
@author Hartwig Anzt
*/
#include "magmasparse_internal.h"
#define THRESHOLD 10e-99
/**
Purpose
-------
Checks the maximal number of nonzeros in a row of matrix A.
Inserts the data into max_nnz_row.
Arguments
---------
@param[in,out]
A magma_s_matrix*
sparse matrix
@param[in]
queue magma_queue_t
Queue to execute in.
@ingroup magmasparse_saux
********************************************************************/
extern "C" magma_int_t
magma_srowentries(
magma_s_matrix *A,
magma_queue_t queue )
{
magma_int_t info = 0;
magma_index_t *length=NULL;
magma_index_t i,j, maxrowlength=0;
// check whether matrix on CPU
if ( A->memory_location == Magma_CPU ) {
// CSR
if ( A->storage_type == Magma_CSR ) {
CHECK( magma_index_malloc_cpu( &length, A->num_rows));
for( i=0; i<A->num_rows; i++ ) {
length[i] = A->row[i+1]-A->row[i];
if (length[i] > maxrowlength)
maxrowlength = length[i];
}
A->max_nnz_row = maxrowlength;
}
// Dense
else if ( A->storage_type == Magma_DENSE ) {
CHECK( magma_index_malloc_cpu( &length, A->num_rows));
for( i=0; i<A->num_rows; i++ ) {
length[i] = 0;
for( j=0; j<A->num_cols; j++ ) {
if ( MAGMA_S_REAL( A->val[i*A->num_cols + j] ) != 0. )
length[i]++;
}
if (length[i] > maxrowlength)
maxrowlength = length[i];
}
A->max_nnz_row = maxrowlength;
}
} // end CPU case
else {
printf("error: matrix not on CPU.\n");
info = MAGMA_ERR_NOT_SUPPORTED;
}
cleanup:
magma_free( length );
return info;
}
/**
Purpose
-------
Computes the diameter of a sparse matrix and stores the value in diameter.
Arguments
---------
@param[in,out]
A magma_s_matrix*
sparse matrix
@param[in]
queue magma_queue_t
Queue to execute in.
@ingroup magmasparse_saux
********************************************************************/
extern "C" magma_int_t
magma_sdiameter(
magma_s_matrix *A,
magma_queue_t queue )
{
magma_int_t info = 0;
magma_index_t i, j, tmp, *dim=NULL, maxdim=0;
// check whether matrix on CPU
if ( A->memory_location == Magma_CPU ) {
// CSR
if ( A->storage_type == Magma_CSR ) {
CHECK( magma_index_malloc_cpu( &dim, A->num_rows));
for( i=0; i<A->num_rows; i++ ) {
dim[i] = 0;
for( j=A->row[i]; j<A->row[i+1]; j++ ) {
// if ( MAGMA_S_REAL(A->val[j]) > THRESHOLD ) {
tmp = abs( i - A->col[j] );
if ( tmp > dim[i] )
dim[i] = tmp;
// }
}
if ( dim[i] > maxdim )
maxdim = dim[i];
}
A->diameter = maxdim;
}
// Dense
else if ( A->storage_type == Magma_DENSE ) {
CHECK( magma_index_malloc_cpu( &dim, A->num_rows));
for( i=0; i<A->num_rows; i++ ) {
dim[i] = 0;
for( j=0; j<A->num_cols; j++ ) {
if ( MAGMA_S_REAL( A->val[i*A->num_cols + j] ) != 0.0 ) {
tmp = abs( i -j );
if ( tmp > dim[i] )
dim[i] = tmp;
}
}
if ( dim[i] > maxdim )
maxdim = dim[i];
}
A->diameter = maxdim;
}
// ELLPACK
else if ( A->storage_type == Magma_ELL ) {
CHECK( magma_index_malloc_cpu( &dim, A->num_rows));
for( i=0; i<A->num_rows; i++ ) {
dim[i] = 0;
for( j=i*A->max_nnz_row; j<(i+1)*A->max_nnz_row; j++ ) {
if ( MAGMA_S_REAL( A->val[j] ) > THRESHOLD ) {
tmp = abs( i - A->col[j] );
if ( tmp > dim[i] )
dim[i] = tmp;
}
}
if ( dim[i] > maxdim )
maxdim = dim[i];
}
A->diameter = maxdim;
}
// ELL
else if ( A->storage_type == Magma_ELL ) {
printf("error:format not supported.\n");
info = MAGMA_ERR_NOT_SUPPORTED;
}
} // end CPU case
else {
printf("error: matrix not on CPU.\n");
info = MAGMA_ERR_NOT_SUPPORTED;
}
cleanup:
magma_free( &dim );
return info;
}
|
