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 2D Poisson operator 10 on a vector system with three components 11 **/ 12 13 #ifndef vectorpoisson2dapply_h 14 #define vectorpoisson2dapply_h 15 16 CEED_QFUNCTION(Vector3Poisson2DApply)(void *ctx, const CeedInt Q, 17 const CeedScalar *const *in, 18 CeedScalar *const *out) { 19 // *INDENT-OFF* 20 // in[0] is gradient u, shape [2, nc=3, Q] 21 // in[1] is quadrature data, size (3*Q) 22 const CeedScalar (*ug)[3][CEED_Q_VLA] = (const CeedScalar(*)[3][CEED_Q_VLA])in[0], 23 (*q_data)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[1]; 24 // out[0] is output to multiply against gradient v, shape [2, nc=3, Q] 25 CeedScalar (*vg)[3][CEED_Q_VLA] = (CeedScalar(*)[3][CEED_Q_VLA])out[0]; 26 // *INDENT-ON* 27 28 const CeedInt dim = 2, num_comp = 3; 29 30 // Quadrature point loop 31 CeedPragmaSIMD 32 for (CeedInt i=0; i<Q; i++) { 33 // Read qdata (dXdxdXdxT symmetric matrix) 34 // Stored in Voigt convention 35 // 0 2 36 // 2 1 37 // *INDENT-OFF* 38 const CeedScalar dXdxdXdxT[2][2] = {{q_data[0][i], 39 q_data[2][i]}, 40 {q_data[2][i], 41 q_data[1][i]} 42 }; 43 // *INDENT-ON* 44 45 // Apply Poisson operator 46 // j = direction of vg 47 for (CeedInt j=0; j<dim; j++) 48 for (CeedInt c=0; c<num_comp; c++) 49 vg[j][c][i] = (ug[0][c][i] * dXdxdXdxT[0][j] + 50 ug[1][c][i] * dXdxdXdxT[1][j]); 51 } // End of Quadrature Point Loop 52 53 return CEED_ERROR_SUCCESS; 54 } 55 56 #endif // vectorpoisson2dapply_h 57