1 files changed, 160 insertions, 0 deletions
diff --git a/Examples/SimpleWaveODE/src/calc_rhs.cc b/Examples/SimpleWaveODE/src/calc_rhs.cc
new file mode 100644
index 0000000..d0bf6ef
--- /dev/null
+++ b/Examples/SimpleWaveODE/src/calc_rhs.cc
@@ -0,0 +1,160 @@
+/*  File produced by Kranc */
+
+#define KRANC_C
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cctk.h"
+#include "cctk_Arguments.h"
+#include "cctk_Parameters.h"
+#include "GenericFD.h"
+#include "Differencing.h"
+#include "cctk_Loop.h"
+#include "loopcontrol.h"
+
+/* Define macros used in calculations */
+#define INITVALUE (42)
+#define INV(x) ((CCTK_REAL)1.0 / (x))
+#define SQR(x) ((x) * (x))
+#define CUB(x) ((x) * SQR(x))
+#define QAD(x) (SQR(SQR(x)))
+
+extern "C" void calc_rhs_SelectBCs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  CCTK_INT ierr = 0;
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "SimpleWaveODE::evolved_grouprhs","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for SimpleWaveODE::evolved_grouprhs.");
+  ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, "SimpleWaveODE::ode_grouprhs","flat");
+  if (ierr < 0)
+    CCTK_WARN(1, "Failed to register flat BC for SimpleWaveODE::ode_grouprhs.");
+  return;
+}
+
+static void calc_rhs_Body(cGH const * restrict const cctkGH, int const dir, int const face, CCTK_REAL const normal[3], CCTK_REAL const tangentA[3], CCTK_REAL const tangentB[3], int const imin[3], int const imax[3], int const n_subblock_gfs, CCTK_REAL * restrict const subblock_gfs[])
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  /* Include user-supplied include files */
+  
+  /* Initialise finite differencing variables */
+  ptrdiff_t const di = 1;
+  ptrdiff_t const dj = CCTK_GFINDEX3D(cctkGH,0,1,0) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const dk = CCTK_GFINDEX3D(cctkGH,0,0,1) - CCTK_GFINDEX3D(cctkGH,0,0,0);
+  ptrdiff_t const cdi = sizeof(CCTK_REAL) * di;
+  ptrdiff_t const cdj = sizeof(CCTK_REAL) * dj;
+  ptrdiff_t const cdk = sizeof(CCTK_REAL) * dk;
+  CCTK_REAL const dx = ToReal(CCTK_DELTA_SPACE(0));
+  CCTK_REAL const dy = ToReal(CCTK_DELTA_SPACE(1));
+  CCTK_REAL const dz = ToReal(CCTK_DELTA_SPACE(2));
+  CCTK_REAL const dt = ToReal(CCTK_DELTA_TIME);
+  CCTK_REAL const t = ToReal(cctk_time);
+  CCTK_REAL const dxi = INV(dx);
+  CCTK_REAL const dyi = INV(dy);
+  CCTK_REAL const dzi = INV(dz);
+  CCTK_REAL const khalf = 0.5;
+  CCTK_REAL const kthird = 1/3.0;
+  CCTK_REAL const ktwothird = 2.0/3.0;
+  CCTK_REAL const kfourthird = 4.0/3.0;
+  CCTK_REAL const keightthird = 8.0/3.0;
+  CCTK_REAL const hdxi = 0.5 * dxi;
+  CCTK_REAL const hdyi = 0.5 * dyi;
+  CCTK_REAL const hdzi = 0.5 * dzi;
+  
+  /* Initialize predefined quantities */
+  CCTK_REAL const p1o2dx = 0.5*INV(dx);
+  CCTK_REAL const p1o2dy = 0.5*INV(dy);
+  CCTK_REAL const p1o2dz = 0.5*INV(dz);
+  CCTK_REAL const p1odx2 = INV(SQR(dx));
+  CCTK_REAL const p1ody2 = INV(SQR(dy));
+  CCTK_REAL const p1odz2 = INV(SQR(dz));
+  
+  /* Assign local copies of arrays functions */
+  
+  CCTK_REAL aL = a[0];
+  CCTK_REAL bL = b[0];
+  
+  
+  /* Calculate temporaries and arrays functions */
+  CCTK_REAL arhsL = bL;
+  
+  CCTK_REAL brhsL = -aL;
+  
+  /* Copy local copies back to grid functions */
+  arhs[0] = arhsL;
+  brhs[0] = brhsL;
+  
+  /* Loop over the grid points */
+  #pragma omp parallel
+  CCTK_LOOP3(calc_rhs,
+    i,j,k, imin[0],imin[1],imin[2], imax[0],imax[1],imax[2],
+    cctk_ash[0],cctk_ash[1],cctk_ash[2])
+  {
+    ptrdiff_t const index = di*i + dj*j + dk*k;
+    
+    /* Assign local copies of grid functions */
+    
+    CCTK_REAL phiL = phi[index];
+    CCTK_REAL piL = pi[index];
+    
+    
+    /* Include user supplied include files */
+    
+    /* Precompute derivatives */
+    CCTK_REAL const PDstandard2nd11phi = PDstandard2nd11(&phi[index]);
+    CCTK_REAL const PDstandard2nd22phi = PDstandard2nd22(&phi[index]);
+    CCTK_REAL const PDstandard2nd33phi = PDstandard2nd33(&phi[index]);
+    
+    /* Calculate temporaries and grid functions */
+    CCTK_REAL phirhsL = piL;
+    
+    CCTK_REAL pirhsL = aL*(PDstandard2nd11phi + PDstandard2nd22phi + 
+      PDstandard2nd33phi);
+    
+    /* Copy local copies back to grid functions */
+    phirhs[index] = phirhsL;
+    pirhs[index] = pirhsL;
+  }
+  CCTK_ENDLOOP3(calc_rhs);
+}
+
+extern "C" void calc_rhs(CCTK_ARGUMENTS)
+{
+  DECLARE_CCTK_ARGUMENTS;
+  DECLARE_CCTK_PARAMETERS;
+  
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Entering calc_rhs_Body");
+  }
+  
+  if (cctk_iteration % calc_rhs_calc_every != calc_rhs_calc_offset)
+  {
+    return;
+  }
+  
+  const char *const groups[] = {
+    "SimpleWaveODE::evolved_group",
+    "SimpleWaveODE::evolved_grouprhs",
+    "SimpleWaveODE::ode_group",
+    "SimpleWaveODE::ode_grouprhs"};
+  GenericFD_AssertGroupStorage(cctkGH, "calc_rhs", 4, groups);
+  
+  GenericFD_EnsureStencilFits(cctkGH, "calc_rhs", 1, 1, 1);
+  
+  GenericFD_LoopOverInterior(cctkGH, calc_rhs_Body);
+  
+  if (verbose > 1)
+  {
+    CCTK_VInfo(CCTK_THORNSTRING,"Leaving calc_rhs_Body");
+  }
+}