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
|
/* Ergo, version 3.8, a program for linear scaling electronic structure
* calculations.
* Copyright (C) 2019 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
* and Anastasia Kruchinina.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Primary academic reference:
* Ergo: An open-source program for linear-scaling electronic structure
* calculations,
* Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
* Kruchinina,
* SoftwareX 7, 107 (2018),
* <http://dx.doi.org/10.1016/j.softx.2018.03.005>
*
* For further information about Ergo, see <http://www.ergoscf.org>.
*/
/* This file belongs to the template_lapack part of the Ergo source
* code. The source files in the template_lapack directory are modified
* versions of files originally distributed as CLAPACK, see the
* Copyright/license notice in the file template_lapack/COPYING.
*/
#include "template_blas_common.h"
#include <iostream>
#include <math.h>
#include <stdio.h>
typedef double realtype;
int main()
{
int nn = 2;
int ONE = 1;
double x[2];
x[0] = 1;
x[1] = 1;
double norm = template_blas_nrm2(&nn, x, &ONE);
std::cout << "template_blas_nrm2 returned " << norm << std::endl;
realtype A[4];
A[0] = 1.3; A[1] = 2.4;
A[2] = 1.1; A[3] = 2.7;
realtype B[4];
B[0] = 0.3; B[1] = 0.4;
B[2] = 0.1; B[3] = 0.7;
realtype C[4];
C[0] = 0; C[1] = 0;
C[2] = 0; C[3] = 0;
int m = 2;
int n = 2;
int k = 2;
realtype alpha = 1.0;
realtype beta = 0.0;
template_blas_gemm("N", "N", &m, &n, &k, &alpha, A, &m, B, &m, &beta, C, &m);
std::cout << "template_blas_gemm finished.\n";
#if 0
for(int i = 0; i < n; i++)
{
for(int j = 0; j < n; j++)
std::cout << " " << C[i*n+j];
std::cout << std::endl;
}
#endif
realtype D[4];
for(int i = 0; i < n; i++)
for(int j = 0; j < n; j++)
{
realtype sum = 0;
for(int k = 0; k < n; k++)
sum += B[i*n+k] * A[k*n+j];
D[i*n+j] = sum;
}
#if 0
for(int i = 0; i < n; i++)
{
for(int j = 0; j < n; j++)
std::cout << " " << D[i*n+j];
std::cout << std::endl;
}
#endif
for(int i = 0; i < n; i++)
for(int j = 0; j < n; j++)
{
if(fabs(C[i*n+j] - D[i*n+j]) > 1e-11)
{
std::cout << "ERROR! wrong result from gemm!\n";
return -1;
}
}
realtype piTest = template_blas_compute_pi_BBP((realtype)0);
std::cout << "pi = " << piTest << std::endl;
printf("pi = %22.15f\n", (double)piTest);
return 0;
}
|
