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Author SHA1 Message Date
39234bf05a Fix lower-order C lopsided boundary fallbacks 2026-05-14 21:38:46 +08:00
45ae92fd92 Fix eighth-order C derivative and lopsided stencils 2026-05-14 20:50:07 +08:00
b489564311 Fix C derivative ghost-buffer indexing across FD orders 2026-05-14 16:22:21 +08:00
7e1ee37bf7 Fix fourth-order C lopsided and KO stencil indexing 2026-05-14 15:28:32 +08:00
3b5b5fa2bc Fix shell C kernel symbol names for Fortran linkage (fderivs_sh_ etc.)
Shell C functions must export Fortran-compatible symbols with trailing
underscore so bssn_rhs_ss.f90 and getnp4.f90 can link when WithShell is
active and USE_CXX_SHELL_KERNELS=1 replaces Fortran diff_new_sh.o.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-14 14:09:34 +08:00
a50c7214b9 Add C kernel for BSSN-EM (Maxwell/electromagnetic field) RHS computation
New bssn_em_rhs_c.C computes EM field RHS (E,B,Kpsi,Kphi) and stress-energy
tensor, then calls the C BSSN RHS kernel with source terms. Replaces empart.f90
when USE_CXX_EM_KERNEL=1. Supports all ghost_width orders via existing derivative
kernels. Controlled by USE_CXX_EM_KERNEL switch (default 0, experimental).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-14 11:38:57 +08:00
08a6ee0120 Add C implementations of shell-patch derivative kernels (WithShell support)
New files provide C equivalents of Fortran diff_new_sh.f90 and kodiss_sh.f90:
- fderivs_sh_c.C: first derivatives in shell (rho, sigma, R) coords
- fdderivs_sh_c.C: second derivatives in shell coords
- fderivs_shc_c.C: shell first derivs + chain rule to Cartesian
- fdderivs_shc_c.C: shell second derivs + chain rule to Cartesian
- kodiss_sh_c.C: Kreiss-Oliger dissipation on shell patches

Also add symmetry_stbd() C implementation and shell fh indexing to share_func.h.
Controlled by USE_CXX_SHELL_KERNELS switch (default 0, experimental).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-14 11:38:41 +08:00
c6ecc11d7e Add full FD order support (2nd/4th/6th/8th) to C derivative kernels via ghost_width dispatch
Wrap each C kernel in #if (ghost_width == N) blocks matching Fortran stencil
coefficients from diff_new.f90, kodiss.f90, and lopsidediff.f90. Add fast-path
indexing for ord=1,4,5 in share_func.h.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-14 11:38:18 +08:00
3 changed files with 3 additions and 13 deletions

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@@ -27,7 +27,7 @@ using namespace std;
#endif
#include "TwoPunctures.h"
#include <cblas.h>
#include <mkl_cblas.h>
TwoPunctures::TwoPunctures(double mp, double mm, double b,
double P_plusx, double P_plusy, double P_plusz,

View File

@@ -1075,10 +1075,6 @@ int f_compute_rhs_bssn(int *ex, double &T,
}
#endif
#if (GAUGE == 2 || GAUGE == 3 || GAUGE == 4 || GAUGE == 5)
fderivs(ex,chi,dtSfx_rhs,dtSfy_rhs,dtSfz_rhs,X,Y,Z,SYM,SYM,SYM,Symmetry,Lev);
#endif
for (int i = 0; i < all; i += 1) {
#if (GAUGE == 0)
betax_rhs[i] = FF * dtSfx[i];
@@ -1164,17 +1160,11 @@ int f_compute_rhs_bssn(int *ex, double &T,
lopsided_kodis(ex,X,Y,Z,gyz,gyz_rhs,betax,betay,betaz,Symmetry,SAA,eps);
lopsided_kodis(ex,X,Y,Z,betaz,betaz_rhs,betax,betay,betaz,Symmetry,SSA,eps);
lopsided_kodis(ex,X,Y,Z,dzz,gzz_rhs,betax,betay,betaz,Symmetry,SSS,eps);
#if (GAUGE == 0 || GAUGE == 2 || GAUGE == 3 || GAUGE == 6 || GAUGE == 7)
lopsided_kodis(ex,X,Y,Z,dtSfx,dtSfx_rhs,betax,betay,betaz,Symmetry,ASS,eps);
#endif
lopsided_kodis(ex,X,Y,Z,Axx,Axx_rhs,betax,betay,betaz,Symmetry,SSS,eps);
#if (GAUGE == 0 || GAUGE == 2 || GAUGE == 3 || GAUGE == 6 || GAUGE == 7)
lopsided_kodis(ex,X,Y,Z,dtSfy,dtSfy_rhs,betax,betay,betaz,Symmetry,SAS,eps);
#endif
lopsided_kodis(ex,X,Y,Z,Axy,Axy_rhs,betax,betay,betaz,Symmetry,AAS,eps);
#if (GAUGE == 0 || GAUGE == 2 || GAUGE == 3 || GAUGE == 6 || GAUGE == 7)
lopsided_kodis(ex,X,Y,Z,dtSfz,dtSfz_rhs,betax,betay,betaz,Symmetry,SSA,eps);
#endif
lopsided_kodis(ex,X,Y,Z,Axz,Axz_rhs,betax,betay,betaz,Symmetry,ASA,eps);
lopsided_kodis(ex,X,Y,Z,Ayy,Ayy_rhs,betax,betay,betaz,Symmetry,SSS,eps);
lopsided_kodis(ex,X,Y,Z,Ayz,Ayz_rhs,betax,betay,betaz,Symmetry,SAA,eps);

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@@ -17,8 +17,8 @@ using namespace std;
#include <math.h>
#endif
// LAPACKE interface (AOCL for AOCC, oneMKL for Intel)
#include <lapacke.h>
// Intel oneMKL LAPACK interface
#include <mkl_lapacke.h>
/* Linear equation solution using Intel oneMKL LAPACK.
a[0..n-1][0..n-1] is the input matrix. b[0..n-1] is input
containing the right-hand side vectors. On output a is