mirror of
https://github.com/Steffo99/unimore-hpc-assignments.git
synced 2024-11-26 18:14:23 +00:00
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
/* Include polybench common header. */
|
|
#include <polybench.h>
|
|
|
|
/* Include benchmark-specific header. */
|
|
/* Default data type is double, default size is 1024. */
|
|
#include "floyd-warshall.h"
|
|
|
|
/* Array initialization. */
|
|
static void init_array(int n,
|
|
DATA_TYPE POLYBENCH_2D(path, N, N, n, n))
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < n; i++)
|
|
for (j = 0; j < n; j++)
|
|
path[i][j] = ((DATA_TYPE)(i + 1) * (j + 1)) / n;
|
|
}
|
|
|
|
/* 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_2D(path, N, N, n, n))
|
|
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < n; i++)
|
|
for (j = 0; j < n; j++)
|
|
{
|
|
fprintf(stderr, DATA_PRINTF_MODIFIER, path[i][j]);
|
|
if ((i * n + j) % 20 == 0)
|
|
fprintf(stderr, "\n");
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
/* Main computational kernel. The whole function will be timed,
|
|
including the call and return. */
|
|
static void kernel_floyd_warshall(int n,
|
|
DATA_TYPE POLYBENCH_2D(path, N, N, n, n))
|
|
{
|
|
int i, j, k;
|
|
DATA_TYPE path_new, path_old;
|
|
|
|
for (k = 0; k < _PB_N; k++)
|
|
{
|
|
#pragma omp for shared(k) private(j)
|
|
for (i = 0; i < _PB_N; i++)
|
|
for (j = 0; j < _PB_N; j++)
|
|
{
|
|
path_old = path[i][j];
|
|
path_new = path[i][k] + path[k][j];
|
|
path[i][j] = (path[i][j] < path_new)
|
|
? path[i][j]
|
|
: path_new;
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
/* Retrieve problem size. */
|
|
int n = N;
|
|
|
|
/* Variable declaration/allocation. */
|
|
POLYBENCH_2D_ARRAY_DECL(path, DATA_TYPE, N, N, n, n);
|
|
|
|
/* Initialize array(s). */
|
|
init_array(n, POLYBENCH_ARRAY(path));
|
|
|
|
/* Start timer. */
|
|
polybench_start_instruments;
|
|
|
|
/* Run kernel. */
|
|
kernel_floyd_warshall(n, POLYBENCH_ARRAY(path));
|
|
|
|
/* 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(path)));
|
|
|
|
/* Be clean. */
|
|
POLYBENCH_FREE_ARRAY(path);
|
|
|
|
return 0;
|
|
}
|