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129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* POLYBENCH/GPU-OPENMP
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*
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* This file is a part of the Polybench/GPU-OpenMP suite
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*
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* Contact:
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* William Killian <killian@udel.edu>
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*
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* Copyright 2013, The University of Delaware
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*/
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#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 10x1024x1024. */
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#include "adi.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(X, N, N, n, n),
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DATA_TYPE POLYBENCH_2D(A, N, N, n, n),
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DATA_TYPE POLYBENCH_2D(B, 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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X[i][j] = ((DATA_TYPE)i * (j + 1) + 1) / n;
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A[i][j] = ((DATA_TYPE)i * (j + 2) + 2) / n;
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B[i][j] = ((DATA_TYPE)i * (j + 3) + 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_2D(X, 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, X[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_adi(int tsteps,
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int n,
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DATA_TYPE POLYBENCH_2D(X, N, N, n, n),
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DATA_TYPE POLYBENCH_2D(A, N, N, n, n),
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DATA_TYPE POLYBENCH_2D(B, N, N, n, n))
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{
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int t, i1, i2;
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for (t = 0; t < _PB_TSTEPS; t++)
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{
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for (i1 = 0; i1 < _PB_N; i1++)
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for (i2 = 1; i2 < _PB_N; i2++)
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{
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X[i1][i2] = X[i1][i2] - X[i1][i2 - 1] * A[i1][i2] / B[i1][i2 - 1];
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B[i1][i2] = B[i1][i2] - A[i1][i2] * A[i1][i2] / B[i1][i2 - 1];
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}
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for (i1 = 0; i1 < _PB_N; i1++)
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X[i1][_PB_N - 1] = X[i1][_PB_N - 1] / B[i1][_PB_N - 1];
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for (i1 = 0; i1 < _PB_N; i1++)
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for (i2 = 0; i2 < _PB_N - 2; i2++)
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X[i1][_PB_N - i2 - 2] = (X[i1][_PB_N - 2 - i2] - X[i1][_PB_N - 2 - i2 - 1] * A[i1][_PB_N - i2 - 3]) / B[i1][_PB_N - 3 - i2];
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for (i1 = 1; i1 < _PB_N; i1++)
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for (i2 = 0; i2 < _PB_N; i2++)
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{
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X[i1][i2] = X[i1][i2] - X[i1 - 1][i2] * A[i1][i2] / B[i1 - 1][i2];
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B[i1][i2] = B[i1][i2] - A[i1][i2] * A[i1][i2] / B[i1 - 1][i2];
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}
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for (i2 = 0; i2 < _PB_N; i2++)
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X[_PB_N - 1][i2] = X[_PB_N - 1][i2] / B[_PB_N - 1][i2];
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for (i1 = 0; i1 < _PB_N - 2; i1++)
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for (i2 = 0; i2 < _PB_N; i2++)
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X[_PB_N - 2 - i1][i2] = (X[_PB_N - 2 - i1][i2] - X[_PB_N - i1 - 3][i2] * A[_PB_N - 3 - i1][i2]) / B[_PB_N - 2 - i1][i2];
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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_2D_ARRAY_DECL(X, DATA_TYPE, N, N, n, n);
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POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, N, N, n, n);
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POLYBENCH_2D_ARRAY_DECL(B, DATA_TYPE, N, N, n, n);
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/* Initialize array(s). */
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init_array(n, POLYBENCH_ARRAY(X), 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_adi(tsteps, n, POLYBENCH_ARRAY(X),
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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(X)));
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/* Be clean. */
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POLYBENCH_FREE_ARRAY(X);
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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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