xref: /libCEED/tests/t405-qfunction.h (revision 2ba3f748b44edc091d4082cfe571655b6bd7a424)
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 #include <ceed.h>
9 
10 CEED_QFUNCTION(setup)(void *ctx, const CeedInt Q,
11                       const CeedScalar *const *in,
12                       CeedScalar *const *out) {
13   const CeedScalar *w = in[0];
14   CeedScalar *q_data = out[0];
15   for (CeedInt i=0; i<Q; i++) {
16     q_data[i] = w[i];
17   }
18   return 0;
19 }
20 
21 CEED_QFUNCTION_HELPER CeedScalar times_two(CeedScalar x) {
22   return 2 * x;
23 }
24 
25 CEED_QFUNCTION(mass)(void *ctx, const CeedInt Q, const CeedScalar *const *in,
26                      CeedScalar *const *out) {
27   const CeedScalar *q_data = in[0], *u = in[1];
28   CeedScalar *v = out[0];
29   for (CeedInt i=0; i<Q; i++) {
30     v[i] = q_data[i] * times_two(u[i]);
31   }
32   return 0;
33 }
34