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 CEED_QFUNCTION(Poisson3DApply)(void *ctx, const CeedInt Q, 17 const CeedScalar *const *in, 18 CeedScalar *const *out) { 19 // *INDENT-OFF* 20 // in[0] is gradient u, shape [3, nc=1, Q] 21 // in[1] is quadrature data, size (6*Q) 22 const CeedScalar (*ug)[CEED_Q_VLA] = (const CeedScalar(*)[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 [3, nc=1, Q] 25 CeedScalar (*vg)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0]; 26 // *INDENT-ON* 27 28 const CeedInt dim = 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 5 4 36 // 5 1 3 37 // 4 3 2 38 // *INDENT-OFF* 39 const CeedScalar dXdxdXdxT[3][3] = {{q_data[0][i], 40 q_data[5][i], 41 q_data[4][i]}, 42 {q_data[5][i], 43 q_data[1][i], 44 q_data[3][i]}, 45 {q_data[4][i], 46 q_data[3][i], 47 q_data[2][i]} 48 }; 49 // *INDENT-ON* 50 51 // Apply Poisson Operator 52 // j = direction of vg 53 for (CeedInt j=0; j<dim; j++) 54 vg[j][i] = (ug[0][i] * dXdxdXdxT[0][j] + 55 ug[1][i] * dXdxdXdxT[1][j] + 56 ug[2][i] * dXdxdXdxT[2][j]); 57 } // End of Quadrature Point Loop 58 59 return CEED_ERROR_SUCCESS; 60 } 61 62 #endif // poisson3dapply_h 63