jacobi application

codes/jacobi-2d/jacobi-2d.c

+/**
+ * This version is stamped on May 10, 2016
+ *
+ * Contact:
+ *   Louis-Noel Pouchet <pouchet.ohio-state.edu>
+ *   Tomofumi Yuki <tomofumi.yuki.fr>
+ *
+ * Web address: http://polybench.sourceforge.net
+ */
+/* jacobi-2d.c: this file is part of PolyBench/C */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <math.h>
+
+/* Include polybench common header. */
+#include <polybench.h>
+
+/* Include benchmark-specific header. */
+#include "jacobi-2d.h"
+
+
+/* Array initialization. */
+static
+void init_array (int n,
+		 DATA_TYPE POLYBENCH_2D(A,N,N,n,n),
+		 DATA_TYPE POLYBENCH_2D(B,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;
+	B[i][j] = ((DATA_TYPE) i*(j+3) + 3) / 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;
+
+  POLYBENCH_DUMP_START;
+  POLYBENCH_DUMP_BEGIN("A");
+  for (i = 0; i < n; i++)
+    for (j = 0; j < n; j++) {
+      if ((i * n + j) % 20 == 0) fprintf(POLYBENCH_DUMP_TARGET, "\n");
+      fprintf(POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, A[i][j]);
+    }
+  POLYBENCH_DUMP_END("A");
+  POLYBENCH_DUMP_FINISH;
+}
+
+
+/* Main computational kernel. The whole function will be timed,
+   including the call and return. */
+static
+void kernel_jacobi_2d(int tsteps,
+			    int n,
+			    DATA_TYPE POLYBENCH_2D(A,N,N,n,n),
+			    DATA_TYPE POLYBENCH_2D(B,N,N,n,n))
+{
+  int t, i, j;
+
+#pragma scop
+  for (t = 0; t < _PB_TSTEPS; t++)
+    {
+      for (i = 1; i < _PB_N - 1; i++)
+	for (j = 1; j < _PB_N - 1; j++)
+	  B[i][j] = SCALAR_VAL(0.2) * (A[i][j] + A[i][j-1] + A[i][1+j] + A[1+i][j] + A[i-1][j]);
+      for (i = 1; i < _PB_N - 1; i++)
+	for (j = 1; j < _PB_N - 1; j++)
+	  A[i][j] = SCALAR_VAL(0.2) * (B[i][j] + B[i][j-1] + B[i][1+j] + B[1+i][j] + B[i-1][j]);
+    }
+#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);
+  POLYBENCH_2D_ARRAY_DECL(B, DATA_TYPE, N, N, n, n);
+
+
+  /* Initialize array(s). */
+  init_array (n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(B));
+
+  /* Start timer. */
+  polybench_start_instruments;
+
+  /* Run kernel. */
+  kernel_jacobi_2d(tsteps, n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(B));
+
+  /* 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);
+  POLYBENCH_FREE_ARRAY(B);
+
+  return 0;
+}

codes/jacobi-2d/jacobi-2d.h

+/**
+ * This version is stamped on May 10, 2016
+ *
+ * Contact:
+ *   Louis-Noel Pouchet <pouchet.ohio-state.edu>
+ *   Tomofumi Yuki <tomofumi.yuki.fr>
+ *
+ * Web address: http://polybench.sourceforge.net
+ */
+#ifndef _JACOBI_2D_H
+# define _JACOBI_2D_H
+
+/* Default to LARGE_DATASET. */
+# if !defined(MINI_DATASET) && !defined(SMALL_DATASET) && !defined(MEDIUM_DATASET) && !defined(LARGE_DATASET) && !defined(EXTRALARGE_DATASET)
+#  define LARGE_DATASET
+# endif
+
+# if !defined(TSTEPS) && !defined(N)
+/* Define sample dataset sizes. */
+#  ifdef MINI_DATASET
+#   define TSTEPS 20
+#   define N 30
+#  endif
+
+#  ifdef SMALL_DATASET
+#   define TSTEPS 40
+#   define N 90
+#  endif
+
+#  ifdef MEDIUM_DATASET
+#   define TSTEPS 100
+#   define N 250
+#  endif
+
+#  ifdef LARGE_DATASET
+#   define TSTEPS 500
+#   define N 1300
+#  endif
+
+#  ifdef EXTRALARGE_DATASET
+#   define TSTEPS 1000
+#   define N 2800
+#  endif
+
+
+#endif /* !(TSTEPS N) */
+
+# define _PB_TSTEPS POLYBENCH_LOOP_BOUND(TSTEPS,tsteps)
+# define _PB_N POLYBENCH_LOOP_BOUND(N,n)
+
+
+/* Default data type */
+# if !defined(DATA_TYPE_IS_INT) && !defined(DATA_TYPE_IS_FLOAT) && !defined(DATA_TYPE_IS_DOUBLE)
+#  define DATA_TYPE_IS_DOUBLE
+# endif
+
+#ifdef DATA_TYPE_IS_INT
+#  define DATA_TYPE int
+#  define DATA_PRINTF_MODIFIER "%d "
+#endif
+
+#ifdef DATA_TYPE_IS_FLOAT
+#  define DATA_TYPE float
+#  define DATA_PRINTF_MODIFIER "%0.2f "
+#  define SCALAR_VAL(x) x##f
+#  define SQRT_FUN(x) sqrtf(x)
+#  define EXP_FUN(x) expf(x)
+#  define POW_FUN(x,y) powf(x,y)
+# endif
+
+#ifdef DATA_TYPE_IS_DOUBLE
+#  define DATA_TYPE double
+#  define DATA_PRINTF_MODIFIER "%0.2lf "
+#  define SCALAR_VAL(x) x
+#  define SQRT_FUN(x) sqrt(x)
+#  define EXP_FUN(x) exp(x)
+#  define POW_FUN(x,y) pow(x,y)
+# endif
+
+#endif /* !_JACOBI_2D_H */