xref: /libCEED/examples/petsc/qfunctions/bps/common.h (revision 16911fdad6ca4b1dd37f9d3206958ee664667dbe)
1 // Copyright (c) 2017, Lawrence Livermore National Security, LLC. Produced at
2 // the Lawrence Livermore National Laboratory. LLNL-CODE-734707. All Rights
3 // reserved. See files LICENSE and NOTICE for details.
4 //
5 // This file is part of CEED, a collection of benchmarks, miniapps, software
6 // libraries and APIs for efficient high-order finite element and spectral
7 // element discretizations for exascale applications. For more information and
8 // source code availability see http://github.com/ceed.
9 //
10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC,
11 // a collaborative effort of two U.S. Department of Energy organizations (Office
12 // of Science and the National Nuclear Security Administration) responsible for
13 // the planning and preparation of a capable exascale ecosystem, including
14 // software, applications, hardware, advanced system engineering and early
15 // testbed platforms, in support of the nation's exascale computing imperative.
16 
17 /// @file
18 /// libCEED QFunctions for BP examples using PETSc
19 
20 // -----------------------------------------------------------------------------
21 CEED_QFUNCTION(Error)(void *ctx, CeedInt Q,
22                       const CeedScalar *const *in, CeedScalar *const *out) {
23   const CeedScalar *u = in[0], *target = in[1];
24   CeedScalar *err = out[0];
25   for (CeedInt i=0; i<Q; i++) {
26     err[i] = u[i] - target[i];
27   }
28   return 0;
29 }
30 
31 // -----------------------------------------------------------------------------
32 CEED_QFUNCTION(Error3)(void *ctx, CeedInt Q,
33                        const CeedScalar *const *in, CeedScalar *const *out) {
34   const CeedScalar *u = in[0], *target = in[1];
35   CeedScalar *err = out[0];
36   for (CeedInt i=0; i<3*Q; i++) {
37     err[i] = u[i] - target[i];
38   }
39   return 0;
40 }
41 // -----------------------------------------------------------------------------
42