1 // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC. 2 // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707. 3 // All Rights 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 /// A structure used to pass additional data to f_build_mass 18 struct BuildContext { CeedInt dim, space_dim; }; 19 20 /// libCEED Q-function for building quadrature data for a mass operator 21 CEED_QFUNCTION(f_build_mass)(void *ctx, const CeedInt Q, 22 const CeedScalar *const *in, CeedScalar *const *out) { 23 // in[0] is Jacobians with shape [dim, nc=dim, Q] 24 // in[1] is quadrature weights, size (Q) 25 BuildContext *bc = (BuildContext *)ctx; 26 const CeedScalar *J = in[0], *qw = in[1]; 27 CeedScalar *rho = out[0]; 28 switch (bc->dim + 10*bc->space_dim) { 29 case 11: 30 for (CeedInt i=0; i<Q; i++) { 31 rho[i] = J[i] * qw[i]; 32 } 33 break; 34 case 22: 35 for (CeedInt i=0; i<Q; i++) { 36 // 0 2 37 // 1 3 38 rho[i] = (J[i+Q*0]*J[i+Q*3] - J[i+Q*1]*J[i+Q*2]) * qw[i]; 39 } 40 break; 41 case 33: 42 for (CeedInt i=0; i<Q; i++) { 43 // 0 3 6 44 // 1 4 7 45 // 2 5 8 46 rho[i] = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 47 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 48 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])) * qw[i]; 49 } 50 break; 51 } 52 return 0; 53 } 54 55 /// libCEED Q-function for applying a mass operator 56 CEED_QFUNCTION(f_apply_mass)(void *ctx, const CeedInt Q, 57 const CeedScalar *const *in, CeedScalar *const *out) { 58 const CeedScalar *u = in[0], *w = in[1]; 59 CeedScalar *v = out[0]; 60 for (CeedInt i=0; i<Q; i++) { 61 v[i] = w[i] * u[i]; 62 } 63 return 0; 64 } 65