| /** |
| * seidel-2d.c: This file is part of the PolyBench/C 3.2 test suite. |
| * |
| * |
| * Contact: Louis-Noel Pouchet <pouchet@cse.ohio-state.edu> |
| * Web address: http://polybench.sourceforge.net |
| */ |
| #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 20x1000. */ |
| #include "seidel-2d.h" |
| |
| |
| /* Array initialization. */ |
| static |
| void init_array (int n, |
| DATA_TYPE POLYBENCH_2D(A,N,N,n,n)) |
| { |
| int i, j; |
| |
| for (i = 0; i < n; i++) |
| for (j = 0; j < n; j++) |
| A[i][j] = ((DATA_TYPE) i*(j+2) + 2) / 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(A,N,N,n,n)) |
| |
| { |
| int i, j; |
| char *printmat = malloc(n*8); |
| |
| for (i = 0; i < n; i++) { |
| for (j = 0; j < n; j++) |
| print_element(A[i][j], j*8, printmat); |
| fputs(printmat, stderr); |
| } |
| free(printmat); |
| } |
| |
| |
| /* Main computational kernel. The whole function will be timed, |
| including the call and return. */ |
| static |
| void kernel_seidel_2d(int tsteps, |
| int n, |
| DATA_TYPE POLYBENCH_2D(A,N,N,n,n)) |
| { |
| int t, i, j; |
| |
| #pragma scop |
| for (t = 0; t <= _PB_TSTEPS - 1; t++) |
| for (i = 1; i<= _PB_N - 2; i++) |
| for (j = 1; j <= _PB_N - 2; j++) |
| A[i][j] = (A[i-1][j-1] + A[i-1][j] + A[i-1][j+1] |
| + A[i][j-1] + A[i][j] + A[i][j+1] |
| + A[i+1][j-1] + A[i+1][j] + A[i+1][j+1])/9.0; |
| #pragma endscop |
| |
| } |
| |
| |
| int main(int argc, char** argv) |
| { |
| /* Retrieve problem size. */ |
| int n = N; |
| int tsteps = TSTEPS; |
| |
| /* Variable declaration/allocation. */ |
| POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, N, N, n, n); |
| |
| |
| /* Initialize array(s). */ |
| init_array (n, POLYBENCH_ARRAY(A)); |
| |
| /* Start timer. */ |
| polybench_start_instruments; |
| |
| /* Run kernel. */ |
| kernel_seidel_2d (tsteps, n, POLYBENCH_ARRAY(A)); |
| |
| /* 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(A))); |
| |
| /* Be clean. */ |
| POLYBENCH_FREE_ARRAY(A); |
| |
| return 0; |
| } |