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https://github.com/Steffo99/unimore-hpc-assignments.git
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127 lines
3.3 KiB
C
127 lines
3.3 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 4000. */
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#include "symm.h"
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/* Array initialization. */
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static void init_array(int ni, int nj,
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DATA_TYPE *alpha,
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DATA_TYPE *beta,
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DATA_TYPE POLYBENCH_2D(C, NI, NJ, ni, nj),
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DATA_TYPE POLYBENCH_2D(A, NJ, NJ, nj, nj),
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DATA_TYPE POLYBENCH_2D(B, NI, NJ, ni, nj))
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{
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int i, j;
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*alpha = 32412;
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*beta = 2123;
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for (i = 0; i < ni; i++)
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for (j = 0; j < nj; j++)
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{
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C[i][j] = ((DATA_TYPE)i * j) / ni;
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B[i][j] = ((DATA_TYPE)i * j) / ni;
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}
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for (i = 0; i < nj; i++)
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for (j = 0; j < nj; j++)
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A[i][j] = ((DATA_TYPE)i * j) / ni;
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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 ni, int nj,
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DATA_TYPE POLYBENCH_2D(C, NI, NJ, ni, nj))
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{
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int i, j;
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for (i = 0; i < ni; i++)
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for (j = 0; j < nj; j++)
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{
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fprintf(stderr, DATA_PRINTF_MODIFIER, C[i][j]);
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if ((i * ni + 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_symm(int ni, int nj,
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DATA_TYPE alpha,
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DATA_TYPE beta,
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DATA_TYPE POLYBENCH_2D(C, NI, NJ, ni, nj),
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DATA_TYPE POLYBENCH_2D(A, NJ, NJ, nj, nj),
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DATA_TYPE POLYBENCH_2D(B, NI, NJ, ni, nj))
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{
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int i, j, k;
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DATA_TYPE acc;
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#pragma scop
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#pragma omp parallel
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{
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/* C := alpha*A*B + beta*C, A is symetric */
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#pragma omp for private(j, acc, k)
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for (i = 0; i < _PB_NI; i++)
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for (j = 0; j < _PB_NJ; j++)
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{
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acc = 0;
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for (k = 0; k < j - 1; k++)
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{
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C[k][j] += alpha * A[k][i] * B[i][j];
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acc += B[k][j] * A[k][i];
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}
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C[i][j] = beta * C[i][j] + alpha * A[i][i] * B[i][j] + alpha * acc;
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}
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}
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#pragma endscop
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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 ni = NI;
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int nj = NJ;
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/* Variable declaration/allocation. */
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DATA_TYPE alpha;
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DATA_TYPE beta;
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POLYBENCH_2D_ARRAY_DECL(C, DATA_TYPE, NI, NJ, ni, nj);
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POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, NJ, NJ, nj, nj);
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POLYBENCH_2D_ARRAY_DECL(B, DATA_TYPE, NI, NJ, ni, nj);
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/* Initialize array(s). */
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init_array(ni, nj, &alpha, &beta,
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POLYBENCH_ARRAY(C),
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POLYBENCH_ARRAY(A),
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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_symm(ni, nj,
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alpha, beta,
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POLYBENCH_ARRAY(C),
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POLYBENCH_ARRAY(A),
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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(ni, nj, POLYBENCH_ARRAY(C)));
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/* Be clean. */
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POLYBENCH_FREE_ARRAY(C);
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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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