1 // Copyright (c) 2017-2026, Lawrence Livermore National Security, LLC and other CEED contributors.
2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details.
3 //
4 // SPDX-License-Identifier: BSD-2-Clause
5 //
6 // This file is part of CEED: http://github.com/ceed
7
8 #include <ceed/types.h>
9
10 /// A structure used to pass additional data to f_build_mass
11 struct BuildContext {
12 CeedInt dim, space_dim;
13 };
14
15 /// libCEED Q-function for building quadrature data for a mass operator
f_build_mass(void * ctx,const CeedInt Q,const CeedScalar * const * in,CeedScalar * const * out)16 CEED_QFUNCTION(f_build_mass)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
17 // in[0] is Jacobians with shape [dim, nc=dim, Q]
18 // in[1] is quadrature weights, size (Q)
19 BuildContext *bc = (BuildContext *)ctx;
20 const CeedScalar *J = in[0], *w = in[1];
21 CeedScalar *qdata = out[0];
22
23 switch (bc->dim + 10 * bc->space_dim) {
24 case 11:
25 // Quadrature Point Loop
26 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { qdata[i] = J[i] * w[i]; }
27 break;
28 case 22:
29 // Quadrature Point Loop
30 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) {
31 // 0 2
32 // 1 3
33 qdata[i] = (J[i + Q * 0] * J[i + Q * 3] - J[i + Q * 1] * J[i + Q * 2]) * w[i];
34 }
35 break;
36 case 33:
37 // Quadrature Point Loop
38 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) {
39 // 0 3 6
40 // 1 4 7
41 // 2 5 8
42 qdata[i] = (J[i + Q * 0] * (J[i + Q * 4] * J[i + Q * 8] - J[i + Q * 5] * J[i + Q * 7]) -
43 J[i + Q * 1] * (J[i + Q * 3] * J[i + Q * 8] - J[i + Q * 5] * J[i + Q * 6]) +
44 J[i + Q * 2] * (J[i + Q * 3] * J[i + Q * 7] - J[i + Q * 4] * J[i + Q * 6])) *
45 w[i];
46 }
47 break;
48 }
49 return 0;
50 }
51
52 /// libCEED Q-function for applying a mass operator
f_apply_mass(void * ctx,const CeedInt Q,const CeedScalar * const * in,CeedScalar * const * out)53 CEED_QFUNCTION(f_apply_mass)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
54 const CeedScalar *u = in[0], *qdata = in[1];
55 CeedScalar *v = out[0];
56
57 // Quadrature Point Loop
58 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { v[i] = qdata[i] * u[i]; }
59 return 0;
60 }
61