1 // Copyright (c) 2017-2022, 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 10 operator 11 **/ 12 13 #ifndef poisson3dapply_h 14 #define poisson3dapply_h 15 16 #include <ceed.h> 17 18 CEED_QFUNCTION(Poisson3DApply)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 19 // in[0] is gradient u, shape [3, nc=1, Q] 20 // in[1] is quadrature data, size (6*Q) 21 const CeedScalar(*ug)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[0], (*q_data)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[1]; 22 // out[0] is output to multiply against gradient v, shape [3, nc=1, Q] 23 CeedScalar(*vg)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0]; 24 25 const CeedInt dim = 3; 26 27 // Quadrature point loop 28 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { 29 // Read qdata (dXdxdXdxT symmetric matrix) 30 // Stored in Voigt convention 31 // 0 5 4 32 // 5 1 3 33 // 4 3 2 34 const CeedScalar dXdxdXdxT[3][3] = { 35 {q_data[0][i], q_data[5][i], q_data[4][i]}, 36 {q_data[5][i], q_data[1][i], q_data[3][i]}, 37 {q_data[4][i], q_data[3][i], q_data[2][i]} 38 }; 39 40 // Apply Poisson Operator 41 // j = direction of vg 42 for (CeedInt j = 0; j < dim; j++) vg[j][i] = (ug[0][i] * dXdxdXdxT[0][j] + ug[1][i] * dXdxdXdxT[1][j] + ug[2][i] * dXdxdXdxT[2][j]); 43 } // End of Quadrature Point Loop 44 45 return CEED_ERROR_SUCCESS; 46 } 47 48 #endif // poisson3dapply_h 49