1 // Copyright (c) 2017-2026, 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 building the geometric data for the 1D Poisson operator
10 **/
11 #include <ceed/types.h>
12
Poisson1DBuild(void * ctx,const CeedInt Q,const CeedScalar * const * in,CeedScalar * const * out)13 CEED_QFUNCTION(Poisson1DBuild)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
14 // At every quadrature point, compute w/det(J).adj(J).adj(J)^T and store
15 // the symmetric part of the result.
16
17 // in[0] is Jacobians, size (Q)
18 // in[1] is quadrature weights, size (Q)
19 const CeedScalar *J = in[0], *w = in[1];
20
21 // out[0] is qdata, size (Q)
22 CeedScalar *q_data = out[0];
23
24 // Quadrature point loop
25 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { q_data[i] = w[i] / J[i]; } // End of Quadrature Point Loop
26 return CEED_ERROR_SUCCESS;
27 }
28