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 /**
9 @brief Ceed QFunction for applying the geometric data for the 3D Poisson on a vector system with three components operator
10 **/
11 #include <ceed/types.h>
12
Vector3Poisson3DApply(void * ctx,const CeedInt Q,const CeedScalar * const * in,CeedScalar * const * out)13 CEED_QFUNCTION(Vector3Poisson3DApply)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
14 // in[0] is gradient u, shape [3, nc=3, Q]
15 // in[1] is quadrature data, size (6*Q)
16 const CeedScalar(*ug)[3][CEED_Q_VLA] = (const CeedScalar(*)[3][CEED_Q_VLA])in[0], (*q_data)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[1];
17 // out[0] is output to multiply against gradient v, shape [3, nc=3, Q]
18 CeedScalar(*vg)[3][CEED_Q_VLA] = (CeedScalar(*)[3][CEED_Q_VLA])out[0];
19
20 const CeedInt dim = 3, num_comp = 3;
21
22 // Quadrature point loop
23 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) {
24 // Read qdata (dXdxdXdxT symmetric matrix)
25 // Stored in Voigt convention
26 // 0 5 4
27 // 5 1 3
28 // 4 3 2
29 const CeedScalar dXdxdXdxT[3][3] = {
30 {q_data[0][i], q_data[5][i], q_data[4][i]},
31 {q_data[5][i], q_data[1][i], q_data[3][i]},
32 {q_data[4][i], q_data[3][i], q_data[2][i]}
33 };
34
35 // Apply Poisson Operator
36 // j = direction of vg
37 for (CeedInt j = 0; j < dim; j++)
38 for (CeedInt c = 0; c < num_comp; c++)
39 vg[j][c][i] = (ug[0][c][i] * dXdxdXdxT[0][j] + ug[1][c][i] * dXdxdXdxT[1][j] + ug[2][c][i] * dXdxdXdxT[2][j]);
40 } // End of Quadrature Point Loop
41 return CEED_ERROR_SUCCESS;
42 }
43