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https://github.com/Steffo99/unimore-hpc-assignments.git
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94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <math.h>
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/* Include polybench common header. */
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#include <polybench.h>
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/* Include benchmark-specific header. */
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/* Default data type is double, default size is 1024. */
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#include "floyd-warshall.h"
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/* Array initialization. */
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static void init_array(int n,
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DATA_TYPE POLYBENCH_2D(path, N, N, n, n))
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{
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int i, j;
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for (i = 0; i < n; i++)
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for (j = 0; j < n; j++)
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path[i][j] = ((DATA_TYPE)(i + 1) * (j + 1)) / n;
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}
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/* DCE code. Must scan the entire live-out data.
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Can be used also to check the correctness of the output. */
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static void print_array(int n,
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DATA_TYPE POLYBENCH_2D(path, N, N, n, n))
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{
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int i, j;
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for (i = 0; i < n; i++)
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for (j = 0; j < n; j++)
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{
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fprintf(stderr, DATA_PRINTF_MODIFIER, path[i][j]);
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if ((i * n + j) % 20 == 0)
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fprintf(stderr, "\n");
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}
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fprintf(stderr, "\n");
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}
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/* Main computational kernel. The whole function will be timed,
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including the call and return. */
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static void kernel_floyd_warshall(int n,
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DATA_TYPE POLYBENCH_2D(path, N, N, n, n))
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{
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int i, j, k;
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DATA_TYPE path_new, path_old;
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for (k = 0; k < _PB_N; k++)
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{
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#pragma omp for shared(k) private(j)
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for (i = 0; i < _PB_N; i++)
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for (j = 0; j < _PB_N; j++)
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{
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path_old = path[i][j];
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path_new = path[i][k] + path[k][j];
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path[i][j] = (path[i][j] < path_new)
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? path[i][j]
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: path_new;
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}
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}
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}
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int main(int argc, char **argv)
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{
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/* Retrieve problem size. */
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int n = N;
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/* Variable declaration/allocation. */
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POLYBENCH_2D_ARRAY_DECL(path, DATA_TYPE, N, N, n, n);
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/* Initialize array(s). */
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init_array(n, POLYBENCH_ARRAY(path));
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/* Start timer. */
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polybench_start_instruments;
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/* Run kernel. */
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kernel_floyd_warshall(n, POLYBENCH_ARRAY(path));
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/* Stop and print timer. */
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polybench_stop_instruments;
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polybench_print_instruments;
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/* Prevent dead-code elimination. All live-out data must be printed
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by the function call in argument. */
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polybench_prevent_dce(print_array(n, POLYBENCH_ARRAY(path)));
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/* Be clean. */
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POLYBENCH_FREE_ARRAY(path);
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return 0;
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}
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