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#define KRANC_C
#include "Differencing.h"
#include "GenericFD.h"
/* Define macros used in calculations */
#define INITVALUE (42)
#define QAD(x) (SQR(SQR(x)))
#define INV(x) ((1.0) / (x))
#define SQR(x) ((x) * (x))
#define CUB(x) ((x) * (x) * (x))
#define CCTK_GFINDEX3D(u,i,j,k) I3D(u,i,j,k)
CAKERNEL_rk1_Begin
/* Include user-supplied include files */
/* Initialise finite differencing variables */
CCTK_REAL const dx = params.cagh_dx;
CCTK_REAL const dy = params.cagh_dy;
CCTK_REAL const dz = params.cagh_dz;
CCTK_REAL const dt = params.cagh_dt;
CCTK_REAL const t = params.cagh_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 */
/* Calculate temporaries and arrays functions */
/* Copy local copies back to grid functions */
CAKERNEL_rk1_Computations_Begin
/* Assign local copies of grid functions */
CCTK_REAL phiL = I3D(phi,0,0,0);
CCTK_REAL phirhsL = I3D(phirhs,0,0,0);
CCTK_REAL piL = I3D(pi,0,0,0);
CCTK_REAL pirhsL = I3D(pirhs,0,0,0);
/* Include user supplied include files */
/* Precompute derivatives */
/* Calculate temporaries and grid functions */
phiL = phiL + phirhsL*dt;
piL = piL + pirhsL*dt;
/* Copy local copies back to grid functions */
I3D(phi,0,0,0) = phiL;
I3D(pi,0,0,0) = piL;
CAKERNEL_rk1_Computations_End
CAKERNEL_rk1_End
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