xref: /libCEED/examples/petsc/qfunctions/bps/common.h (revision 9ba83ac0e4b1fca39d6fa6737a318a9f0cbc172d)
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 /// @file
9 /// libCEED QFunctions for BP examples using PETSc
10 
11 #include <ceed/types.h>
12 
13 // -----------------------------------------------------------------------------
14 CEED_QFUNCTION(Error)(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
15   const CeedScalar *u = in[0], *target = in[1], *q_data = in[2];
16   CeedScalar       *error = out[0];
17   for (CeedInt i = 0; i < Q; i++) {
18     error[i] = (u[i] - target[i]) * (u[i] - target[i]) * q_data[i];
19   }
20   return 0;
21 }
22 
23 // -----------------------------------------------------------------------------
24 CEED_QFUNCTION(Error3)(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) {
25   const CeedScalar *u = in[0], *target = in[1], *q_data = in[2];
26   CeedScalar       *error = out[0];
27   for (CeedInt i = 0; i < Q; i++) {
28     error[i + 0 * Q] = (u[i + 0 * Q] - target[i + 0 * Q]) * (u[i + 0 * Q] - target[i + 0 * Q]) * q_data[i];
29     error[i + 1 * Q] = (u[i + 1 * Q] - target[i + 1 * Q]) * (u[i + 1 * Q] - target[i + 1 * Q]) * q_data[i];
30     error[i + 2 * Q] = (u[i + 2 * Q] - target[i + 2 * Q]) * (u[i + 2 * Q] - target[i + 2 * Q]) * q_data[i];
31   }
32   return 0;
33 }
34 // -----------------------------------------------------------------------------
35