1 // Copyright (c) 2017-2024, 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 2D Poisson operator on a vector system with three components 10 **/ 11 12 #include <ceed.h> 13 14 CEED_QFUNCTION(Vector3Poisson2DApply)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 15 // in[0] is gradient u, shape [2, nc=3, Q] 16 // in[1] is quadrature data, size (3*Q) 17 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]; 18 // out[0] is output to multiply against gradient v, shape [2, nc=3, Q] 19 CeedScalar(*vg)[3][CEED_Q_VLA] = (CeedScalar(*)[3][CEED_Q_VLA])out[0]; 20 21 const CeedInt dim = 2, num_comp = 3; 22 23 // Quadrature point loop 24 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { 25 // Read qdata (dXdxdXdxT symmetric matrix) 26 // Stored in Voigt convention 27 // 0 2 28 // 2 1 29 const CeedScalar dXdxdXdxT[2][2] = { 30 {q_data[0][i], q_data[2][i]}, 31 {q_data[2][i], q_data[1][i]} 32 }; 33 34 // Apply Poisson operator 35 // j = direction of vg 36 for (CeedInt j = 0; j < dim; j++) 37 for (CeedInt c = 0; c < num_comp; c++) vg[j][c][i] = (ug[0][c][i] * dXdxdXdxT[0][j] + ug[1][c][i] * dXdxdXdxT[1][j]); 38 } // End of Quadrature Point Loop 39 40 return CEED_ERROR_SUCCESS; 41 } 42