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 struct BuildContext *bc = (struct BuildContext *)ctx; 26 const CeedScalar *J = in[0], *w = in[1]; 27 CeedScalar *qdata = out[0]; 28 29 switch (bc->dim + 10*bc->space_dim) { 30 case 11: 31 // Quadrature Point Loop 32 CeedPragmaSIMD 33 for (CeedInt i=0; i<Q; i++) { 34 qdata[i] = J[i] * w[i]; 35 } // End of Quadrature Point Loop 36 break; 37 case 22: 38 // Quadrature Point Loop 39 CeedPragmaSIMD 40 for (CeedInt i=0; i<Q; i++) { 41 // 0 2 42 // 1 3 43 qdata[i] = (J[i+Q*0]*J[i+Q*3] - J[i+Q*1]*J[i+Q*2]) * w[i]; 44 } // End of Quadrature Point Loop 45 break; 46 case 33: 47 // Quadrature Point Loop 48 CeedPragmaSIMD 49 for (CeedInt i=0; i<Q; i++) { 50 // 0 3 6 51 // 1 4 7 52 // 2 5 8 53 qdata[i] = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 54 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 55 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])) * w[i]; 56 } // End of Quadrature Point Loop 57 break; 58 } 59 return 0; 60 } 61 62 /// libCEED Q-function for applying a mass operator 63 CEED_QFUNCTION(f_apply_mass)(void *ctx, const CeedInt Q, 64 const CeedScalar *const *in, CeedScalar *const *out) { 65 const CeedScalar *u = in[0], *qdata = in[1]; 66 CeedScalar *v = out[0]; 67 68 // Quadrature Point Loop 69 CeedPragmaSIMD 70 for (CeedInt i=0; i<Q; i++) { 71 v[i] = qdata[i] * u[i]; 72 } // End of Quadrature Point Loop 73 return 0; 74 } 75