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https://github.com/Steffo99/unimore-hpc-assignments.git
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95 lines
2.2 KiB
C
95 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 100x10000. */
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#include "jacobi-1d-imper.h"
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/* Array initialization. */
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static void init_array(int n,
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DATA_TYPE POLYBENCH_1D(A, N, n),
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DATA_TYPE POLYBENCH_1D(B, N, n))
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{
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int i;
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for (i = 0; i < n; i++)
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{
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A[i] = ((DATA_TYPE)i + 2) / n;
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B[i] = ((DATA_TYPE)i + 3) / n;
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}
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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_1D(A, N, n))
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{
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int i;
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for (i = 0; i < n; i++)
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{
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fprintf(stderr, DATA_PRINTF_MODIFIER, A[i]);
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if (i % 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_jacobi_1d_imper(int tsteps,
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int n,
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DATA_TYPE POLYBENCH_1D(A, N, n),
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DATA_TYPE POLYBENCH_1D(B, N, n))
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{
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int t, i, j;
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for (t = 0; t < _PB_TSTEPS; t++)
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{
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for (i = 1; i < _PB_N - 1; i++)
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B[i] = 0.33333 * (A[i - 1] + A[i] + A[i + 1]);
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for (j = 1; j < _PB_N - 1; j++)
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A[j] = B[j];
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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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int tsteps = TSTEPS;
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/* Variable declaration/allocation. */
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POLYBENCH_1D_ARRAY_DECL(A, DATA_TYPE, N, n);
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POLYBENCH_1D_ARRAY_DECL(B, DATA_TYPE, N, n);
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/* Initialize array(s). */
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init_array(n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(B));
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/* Start timer. */
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polybench_start_instruments;
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/* Run kernel. */
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kernel_jacobi_1d_imper(tsteps, n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(B));
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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(A)));
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/* Be clean. */
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POLYBENCH_FREE_ARRAY(A);
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POLYBENCH_FREE_ARRAY(B);
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return 0;
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}
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