fdtd-2d application

codes/fdtd-2d/fdtd-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
+ */
+/* fdtd-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 "fdtd-2d.h"
+
+
+/* Array initialization. */
+static
+void init_array (int tmax,
+		 int nx,
+		 int ny,
+		 DATA_TYPE POLYBENCH_2D(ex,NX,NY,nx,ny),
+		 DATA_TYPE POLYBENCH_2D(ey,NX,NY,nx,ny),
+		 DATA_TYPE POLYBENCH_2D(hz,NX,NY,nx,ny),
+		 DATA_TYPE POLYBENCH_1D(_fict_,TMAX,tmax))
+{
+  int i, j;
+
+  for (i = 0; i < tmax; i++)
+    _fict_[i] = (DATA_TYPE) i;
+  for (i = 0; i < nx; i++)
+    for (j = 0; j < ny; j++)
+      {
+	ex[i][j] = ((DATA_TYPE) i*(j+1)) / nx;
+	ey[i][j] = ((DATA_TYPE) i*(j+2)) / ny;
+	hz[i][j] = ((DATA_TYPE) i*(j+3)) / nx;
+      }
+}
+
+
+/* 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 nx,
+		 int ny,
+		 DATA_TYPE POLYBENCH_2D(ex,NX,NY,nx,ny),
+		 DATA_TYPE POLYBENCH_2D(ey,NX,NY,nx,ny),
+		 DATA_TYPE POLYBENCH_2D(hz,NX,NY,nx,ny))
+{
+  int i, j;
+
+  POLYBENCH_DUMP_START;
+  POLYBENCH_DUMP_BEGIN("ex");
+  for (i = 0; i < nx; i++)
+    for (j = 0; j < ny; j++) {
+      if ((i * nx + j) % 20 == 0) fprintf(POLYBENCH_DUMP_TARGET, "\n");
+      fprintf(POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, ex[i][j]);
+    }
+  POLYBENCH_DUMP_END("ex");
+  POLYBENCH_DUMP_FINISH;
+
+  POLYBENCH_DUMP_BEGIN("ey");
+  for (i = 0; i < nx; i++)
+    for (j = 0; j < ny; j++) {
+      if ((i * nx + j) % 20 == 0) fprintf(POLYBENCH_DUMP_TARGET, "\n");
+      fprintf(POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, ey[i][j]);
+    }
+  POLYBENCH_DUMP_END("ey");
+
+  POLYBENCH_DUMP_BEGIN("hz");
+  for (i = 0; i < nx; i++)
+    for (j = 0; j < ny; j++) {
+      if ((i * nx + j) % 20 == 0) fprintf(POLYBENCH_DUMP_TARGET, "\n");
+      fprintf(POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, hz[i][j]);
+    }
+  POLYBENCH_DUMP_END("hz");
+}
+
+
+/* Main computational kernel. The whole function will be timed,
+   including the call and return. */
+static
+void kernel_fdtd_2d(int tmax,
+		    int nx,
+		    int ny,
+		    DATA_TYPE POLYBENCH_2D(ex,NX,NY,nx,ny),
+		    DATA_TYPE POLYBENCH_2D(ey,NX,NY,nx,ny),
+		    DATA_TYPE POLYBENCH_2D(hz,NX,NY,nx,ny),
+		    DATA_TYPE POLYBENCH_1D(_fict_,TMAX,tmax))
+{
+  int t, i, j;
+
+#pragma scop
+
+  for(t = 0; t < _PB_TMAX; t++)
+    {
+      for (j = 0; j < _PB_NY; j++)
+	ey[0][j] = _fict_[t];
+      for (i = 1; i < _PB_NX; i++)
+	for (j = 0; j < _PB_NY; j++)
+	  ey[i][j] = ey[i][j] - SCALAR_VAL(0.5)*(hz[i][j]-hz[i-1][j]);
+      for (i = 0; i < _PB_NX; i++)
+	for (j = 1; j < _PB_NY; j++)
+	  ex[i][j] = ex[i][j] - SCALAR_VAL(0.5)*(hz[i][j]-hz[i][j-1]);
+      for (i = 0; i < _PB_NX - 1; i++)
+	for (j = 0; j < _PB_NY - 1; j++)
+	  hz[i][j] = hz[i][j] - SCALAR_VAL(0.7)*  (ex[i][j+1] - ex[i][j] +
+				       ey[i+1][j] - ey[i][j]);
+    }
+
+#pragma endscop
+}
+
+
+int main(int argc, char** argv)
+{
+  /* Retrieve problem size. */
+  int tmax = TMAX;
+  int nx = NX;
+  int ny = NY;
+
+  /* Variable declaration/allocation. */
+  POLYBENCH_2D_ARRAY_DECL(ex,DATA_TYPE,NX,NY,nx,ny);
+  POLYBENCH_2D_ARRAY_DECL(ey,DATA_TYPE,NX,NY,nx,ny);
+  POLYBENCH_2D_ARRAY_DECL(hz,DATA_TYPE,NX,NY,nx,ny);
+  POLYBENCH_1D_ARRAY_DECL(_fict_,DATA_TYPE,TMAX,tmax);
+
+  /* Initialize array(s). */
+  init_array (tmax, nx, ny,
+	      POLYBENCH_ARRAY(ex),
+	      POLYBENCH_ARRAY(ey),
+	      POLYBENCH_ARRAY(hz),
+	      POLYBENCH_ARRAY(_fict_));
+
+  /* Start timer. */
+  polybench_start_instruments;
+
+  /* Run kernel. */
+  kernel_fdtd_2d (tmax, nx, ny,
+		  POLYBENCH_ARRAY(ex),
+		  POLYBENCH_ARRAY(ey),
+		  POLYBENCH_ARRAY(hz),
+		  POLYBENCH_ARRAY(_fict_));
+
+
+  /* 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(nx, ny, POLYBENCH_ARRAY(ex),
+				    POLYBENCH_ARRAY(ey),
+				    POLYBENCH_ARRAY(hz)));
+
+  /* Be clean. */
+  POLYBENCH_FREE_ARRAY(ex);
+  POLYBENCH_FREE_ARRAY(ey);
+  POLYBENCH_FREE_ARRAY(hz);
+  POLYBENCH_FREE_ARRAY(_fict_);
+
+  return 0;
+}

codes/fdtd-2d/fdtd-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 _FDTD_2D_H
+# define _FDTD_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(TMAX) && !defined(NX) && !defined(NY)
+/* Define sample dataset sizes. */
+#  ifdef MINI_DATASET
+#   define TMAX 20
+#   define NX 20
+#   define NY 30
+#  endif
+
+#  ifdef SMALL_DATASET
+#   define TMAX 40
+#   define NX 60
+#   define NY 80
+#  endif
+
+#  ifdef MEDIUM_DATASET
+#   define TMAX 100
+#   define NX 200
+#   define NY 240
+#  endif
+
+#  ifdef LARGE_DATASET
+#   define TMAX 500
+#   define NX 1000
+#   define NY 1200
+#  endif
+
+#  ifdef EXTRALARGE_DATASET
+#   define TMAX 1000
+#   define NX 2000
+#   define NY 2600
+#  endif
+
+
+#endif /* !(TMAX NX NY) */
+
+# define _PB_TMAX POLYBENCH_LOOP_BOUND(TMAX,tmax)
+# define _PB_NX POLYBENCH_LOOP_BOUND(NX,nx)
+# define _PB_NY POLYBENCH_LOOP_BOUND(NY,ny)
+
+
+/* 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 /* !_FDTD_2D_H */