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/*@@
@file GenericFD/src/GenericFD.h
@date June 16 2002
@author S. Husa
@desc
$Id$
@enddesc
@@*/
/* Copyright 2004 Sascha Husa, Ian Hinder, Christiane Lechner
This file is part of Kranc.
Kranc is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kranc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kranc; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef __cplusplus
# include <cmath>
#endif
#include <math.h>
#include <cctk.h>
#ifdef __cplusplus
extern "C" {
#endif
#include "MathematicaCompat.h"
#ifdef KRANC_C
/* Grid function access */
/* var is a pointer to a grid point, i,j,k are offsets with respect
to that point.
For example: KRANC_GFINDEX3D_OFFSET(&u[ind3d],-1,-1,0) */
/* simple implementation */
/* #define KRANC_GFOFFSET3D(var,i,j,k) ((var)[di*(i)+dj*(j)+dk*(k)]) */
/* more efficient implementation for some compilers */
#define KRANC_GFOFFSET3D(var,i,j,k) \
(*(CCTK_REAL const*)&((char const*)(var))[cdi*(i)+cdj*(j)+cdk*(k)])
/* Implement the signum function, used for Mathematica's Sign function */
#ifdef __CUDACC__
#define KRANC_WHERE __device__
#else
#define KRANC_WHERE
#endif
KRANC_WHERE static inline CCTK_REAL sgn(CCTK_REAL x)
{
#ifdef __cplusplus
using namespace std;
#endif
return x==(CCTK_REAL)0.0 ? (CCTK_REAL)0.0 : copysign((CCTK_REAL)1.0, x);
}
KRANC_WHERE static inline int isgn(CCTK_REAL x)
{
if (x == (CCTK_REAL)0.0) return 0;
#ifdef __cplusplus
using namespace std;
int s = signbit(x);
#else
int s = signbit(x);
#endif
return s ? -1 : +1;
}
int GenericFD_GetBoundaryWidth(cGH const * restrict const cctkGH);
void GenericFD_GetBoundaryInfo(cGH const * restrict cctkGH,
int const * restrict cctk_ash,
int const * restrict cctk_lsh,
int const * restrict cctk_bbox,
int const * restrict cctk_nghostzones,
int * restrict imin,
int * restrict imax,
int * restrict is_symbnd,
int * restrict is_physbnd,
int * restrict is_ipbnd);
void GenericFD_AssertGroupStorage(cGH const * restrict const cctkGH, const char *calc,
int ngroups, const char *const group_names[]);
/* Summation by parts */
static inline CCTK_REAL sbp_deriv_x(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
CCTK_ATTRIBUTE_PURE;
static inline CCTK_REAL sbp_deriv_x(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
{
CCTK_REAL dvarl = 0;
int ni = cctkGH->cctk_lsh[0];
for (int ii=min[i]-1; ii<=max[i]-1; ++ii) {
dvarl += q[ii+ni*i]*var[CCTK_GFINDEX3D (cctkGH, ii, j, k)];
}
dvarl /= d;
return dvarl;
}
static inline CCTK_REAL sbp_deriv_y(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
CCTK_ATTRIBUTE_PURE;
static inline CCTK_REAL sbp_deriv_y(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
{
CCTK_REAL dvarl = 0;
int nj = cctkGH->cctk_lsh[1];
for (int jj=min[j]-1; jj<=max[j]-1; ++jj) {
dvarl += q[jj+nj*j]*var[CCTK_GFINDEX3D (cctkGH, i, jj, k)];
}
dvarl /= d;
return dvarl;
}
static inline CCTK_REAL sbp_deriv_z(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
CCTK_ATTRIBUTE_PURE;
static inline CCTK_REAL sbp_deriv_z(int i, int j, int k,
const int min[], const int max[],
CCTK_REAL d,
const CCTK_REAL *var, const CCTK_REAL *q,
const cGH *cctkGH)
{
CCTK_REAL dvarl = 0;
int nk = cctkGH->cctk_lsh[2];
for (int kk=min[k]-1; kk<=max[k]-1; ++kk) {
dvarl += q[kk+nk*k]*var[CCTK_GFINDEX3D (cctkGH, i, j, kk)];
}
dvarl /= d;
return dvarl;
}
/* New calculation format */
typedef void(*Kranc_Calculation)(cGH const * restrict cctkGH,
int eir,
int face,
CCTK_REAL const normal[3],
CCTK_REAL const tangentA[3],
CCTK_REAL const tangentB[3],
int const min[3],
int const max[3],
int n_subblock_gfs,
CCTK_REAL * restrict const subblock_gfs[]);
void GenericFD_LoopOverEverything(cGH const * restrict cctkGH, Kranc_Calculation calc);
void GenericFD_LoopOverBoundary(cGH const * restrict cctkGH, Kranc_Calculation calc);
void GenericFD_LoopOverBoundaryWithGhosts(cGH const * restrict cctkGH, Kranc_Calculation calc);
void GenericFD_LoopOverInterior(cGH const * restrict cctkGH, Kranc_Calculation calc);
void GenericFD_GroupDataPointers(cGH const * restrict const cctkGH, const char *group_name,
int nvars, CCTK_REAL const *restrict *ptrs);
void GenericFD_EnsureStencilFits(cGH const * restrict const cctkGH, const char *calc, int ni, int nj, int nk);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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