1a0154adeSJed Brown // Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors. 2a0154adeSJed Brown // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3a0154adeSJed Brown // 4a0154adeSJed Brown // SPDX-License-Identifier: BSD-2-Clause 5a0154adeSJed Brown // 6a0154adeSJed Brown // This file is part of CEED: http://github.com/ceed 7a0154adeSJed Brown 8a0154adeSJed Brown /** 9a0154adeSJed Brown @brief Ceed QFunction for applying the 2D Poisson operator 10a0154adeSJed Brown **/ 11a0154adeSJed Brown 12*94b7b29bSJeremy L Thompson #ifndef CEED_POISSON2DAPPLY_H 13*94b7b29bSJeremy L Thompson #define CEED_POISSON2DAPPLY_H 14a0154adeSJed Brown 15c9c2c079SJeremy L Thompson #include <ceed.h> 16c9c2c079SJeremy L Thompson 172b730f8bSJeremy L Thompson CEED_QFUNCTION(Poisson2DApply)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 18a0154adeSJed Brown // in[0] is gradient u, shape [2, nc=1, Q] 19a0154adeSJed Brown // in[1] is quadrature data, size (3*Q) 202b730f8bSJeremy L Thompson 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]; 21a0154adeSJed Brown // out[0] is output to multiply against gradient v, shape [2, nc=1, Q] 22a0154adeSJed Brown CeedScalar(*vg)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0]; 23a0154adeSJed Brown 24a0154adeSJed Brown const CeedInt dim = 2; 25a0154adeSJed Brown 26a0154adeSJed Brown // Quadrature point loop 272b730f8bSJeremy L Thompson CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { 28a0154adeSJed Brown // Read qdata (dXdxdXdxT symmetric matrix) 29a0154adeSJed Brown // Stored in Voigt convention 30a0154adeSJed Brown // 0 2 31a0154adeSJed Brown // 2 1 322b730f8bSJeremy L Thompson const CeedScalar dXdxdXdxT[2][2] = { 332b730f8bSJeremy L Thompson {q_data[0][i], q_data[2][i]}, 342b730f8bSJeremy L Thompson {q_data[2][i], q_data[1][i]} 35a0154adeSJed Brown }; 36a0154adeSJed Brown 37a0154adeSJed Brown // Apply Poisson operator 38a0154adeSJed Brown // j = direction of vg 392b730f8bSJeremy L Thompson for (CeedInt j = 0; j < dim; j++) vg[j][i] = (ug[0][i] * dXdxdXdxT[0][j] + ug[1][i] * dXdxdXdxT[1][j]); 40a0154adeSJed Brown } // End of Quadrature Point Loop 41a0154adeSJed Brown 42a0154adeSJed Brown return CEED_ERROR_SUCCESS; 43a0154adeSJed Brown } 44a0154adeSJed Brown 45*94b7b29bSJeremy L Thompson #endif // CEED_POISSON2DAPPLY_H 46