Newer
Older
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
/**
* This version is stamped on May 10, 2016
*
* Contact:
* Louis-Noel Pouchet <pouchet.ohio-state.edu>
* Tomofumi Yuki <tomofumi.yuki.fr>
*
* Web address: http://polybench.sourceforge.net
*/
/* atax.c: this file is part of PolyBench/C */
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
/* Include polybench common header. */
#include <polybench.h>
/* Include benchmark-specific header. */
#include "atax.h"
/* Array initialization. */
static
void init_array (int m, int n,
DATA_TYPE POLYBENCH_2D(A,M,N,m,n),
DATA_TYPE POLYBENCH_1D(x,N,n))
{
int i, j;
DATA_TYPE fn;
fn = (DATA_TYPE)n;
for (i = 0; i < n; i++)
x[i] = 1 + (i / fn);
for (i = 0; i < m; i++)
for (j = 0; j < n; j++)
A[i][j] = (DATA_TYPE) ((i+j) % n) / (5*m);
}
/* DCE code. Must scan the entire live-out data.
Can be used also to check the correctness of the output. */
static
void print_array(int n,
DATA_TYPE POLYBENCH_1D(y,N,n))
{
int i;
POLYBENCH_DUMP_START;
POLYBENCH_DUMP_BEGIN("y");
for (i = 0; i < n; i++) {
if (i % 20 == 0) fprintf (POLYBENCH_DUMP_TARGET, "\n");
fprintf (POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, y[i]);
}
POLYBENCH_DUMP_END("y");
POLYBENCH_DUMP_FINISH;
}
/* Main computational kernel. The whole function will be timed,
including the call and return. */
static
void kernel_atax(int m, int n,
DATA_TYPE POLYBENCH_2D(A,M,N,m,n),
DATA_TYPE POLYBENCH_1D(x,N,n),
DATA_TYPE POLYBENCH_1D(y,N,n),
DATA_TYPE POLYBENCH_1D(tmp,M,m))
{
int i, j;
#pragma scop
#pragma omp parallel
{
#pragma omp for schedule(static)
for (i = 0; i < _PB_N; i++)
y[i] = 0;
#pragma omp for schedule(static)
for (i = 0; i < _PB_M; i++)
tmp[i] = SCALAR_VAL(0.0);
#pragma omp for schedule(static)
for (i = 0; i < _PB_M; i++)
for (j = 0; j < _PB_N; j++)
tmp[i] += A[i][j] * x[j];
#pragma omp for schedule(static)
for (i = 0; i < _PB_M; i++)
for (j = 0; j < _PB_N; j++)
y[j] += A[i][j] * tmp[i];
}
#pragma endscop
}
int main(int argc, char** argv)
{
/* Retrieve problem size. */
int m = M;
int n = N;
/* Variable declaration/allocation. */
POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, M, N, m, n);
POLYBENCH_1D_ARRAY_DECL(x, DATA_TYPE, N, n);
POLYBENCH_1D_ARRAY_DECL(y, DATA_TYPE, N, n);
POLYBENCH_1D_ARRAY_DECL(tmp, DATA_TYPE, M, m);
/* Initialize array(s). */
init_array (m, n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(x));
/* Start timer. */
polybench_start_instruments;
/* Run kernel. */
kernel_atax (m, n,
POLYBENCH_ARRAY(A),
POLYBENCH_ARRAY(x),
POLYBENCH_ARRAY(y),
POLYBENCH_ARRAY(tmp));
/* Stop and print timer. */
polybench_stop_instruments;
polybench_print_instruments;
/* Prevent dead-code elimination. All live-out data must be printed
by the function call in argument. */
polybench_prevent_dce(print_array(n, POLYBENCH_ARRAY(y)));
/* Be clean. */
POLYBENCH_FREE_ARRAY(A);
POLYBENCH_FREE_ARRAY(x);
POLYBENCH_FREE_ARRAY(y);
POLYBENCH_FREE_ARRAY(tmp);
return 0;
}