xref: /libCEED/tests/t405-qfunction.h (revision edf0491998c1d524f2f70fdd683669b8904cb3b6)
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, const CeedScalar *const *in, CeedScalar *const *out) {
11   const CeedScalar *w      = in[0];
12   CeedScalar       *q_data = out[0];
13   for (CeedInt i = 0; i < Q; i++) {
14     q_data[i] = w[i];
15   }
16   return 0;
17 }
18 
19 CEED_QFUNCTION_HELPER CeedScalar times_two(CeedScalar x) { return 2 * x; }
20 
21 CEED_QFUNCTION(mass)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
22   const CeedScalar *q_data = in[0], *u = in[1];
23   CeedScalar       *v = out[0];
24   for (CeedInt i = 0; i < Q; i++) {
25     v[i] = q_data[i] * times_two(u[i]);
26   }
27   return 0;
28 }
29