xref: /libCEED/include/ceed/jit-source/gallery/ceed-mass2dbuild.h (revision 94b7b29b41ad8a17add4c577886859ef16f89dec)
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 building the geometric data for the 2D mass matrix
10a0154adeSJed Brown **/
11a0154adeSJed Brown 
12*94b7b29bSJeremy L Thompson #ifndef CEED_MASS2DBUILD_H
13*94b7b29bSJeremy L Thompson #define CEED_MASS2DBUILD_H
14a0154adeSJed Brown 
15c9c2c079SJeremy L Thompson #include <ceed.h>
16c9c2c079SJeremy L Thompson 
172b730f8bSJeremy L Thompson CEED_QFUNCTION(Mass2DBuild)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
18a0154adeSJed Brown   // in[0] is Jacobians with shape [2, nc=2, Q]
19a0154adeSJed Brown   // in[1] is quadrature weights, size (Q)
202b730f8bSJeremy L Thompson   const CeedScalar(*J)[2][CEED_Q_VLA] = (const CeedScalar(*)[2][CEED_Q_VLA])in[0], *w = in[1];
21a0154adeSJed Brown   // out[0] is quadrature data, size (Q)
22a0154adeSJed Brown   CeedScalar *q_data = out[0];
23a0154adeSJed Brown 
24a0154adeSJed Brown   // Quadrature point loop
252b730f8bSJeremy L Thompson   CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) {
26a0154adeSJed Brown     q_data[i] = (J[0][0][i] * J[1][1][i] - J[0][1][i] * J[1][0][i]) * w[i];
27a0154adeSJed Brown   }  // End of Quadrature Point Loop
28a0154adeSJed Brown 
29a0154adeSJed Brown   return CEED_ERROR_SUCCESS;
30a0154adeSJed Brown }
31a0154adeSJed Brown 
32*94b7b29bSJeremy L Thompson #endif  // CEED_MASS2DBUILD_H
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