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 mass operator example using PETSc 19 20 #ifndef bp2_h 21 #define bp2_h 22 23 #ifndef __CUDACC__ 24 # include <math.h> 25 #endif 26 27 // ----------------------------------------------------------------------------- 28 // This QFunction sets up the rhs and true solution for the problem 29 // ----------------------------------------------------------------------------- 30 CEED_QFUNCTION(SetupMassRhs3)(void *ctx, const CeedInt Q, 31 const CeedScalar *const *in, 32 CeedScalar *const *out) { 33 const CeedScalar *x = in[0], *w = in[1]; 34 CeedScalar *true_soln = out[0], *rhs = out[1]; 35 36 // Quadrature Point Loop 37 CeedPragmaSIMD 38 for (CeedInt i=0; i<Q; i++) { 39 // Component 1 40 true_soln[i+0*Q] = sqrt(x[i]*x[i] + x[i+Q]*x[i+Q] + x[i+2*Q]*x[i+2*Q]); 41 // Component 2 42 true_soln[i+1*Q] = 2 * true_soln[i+0*Q]; 43 // Component 3 44 true_soln[i+2*Q] = 3 * true_soln[i+0*Q]; 45 46 // Component 1 47 rhs[i+0*Q] = w[i] * true_soln[i+0*Q]; 48 // Component 2 49 rhs[i+1*Q] = 2 * rhs[i+0*Q]; 50 // Component 3 51 rhs[i+2*Q] = 3 * rhs[i+0*Q]; 52 } // End of Quadrature Point Loop 53 return 0; 54 } 55 56 // ----------------------------------------------------------------------------- 57 // This QFunction applies the mass operator for a vector field of 3 components. 58 // 59 // Inputs: 60 // u - Input vector at quadrature points 61 // q_data - Geometric factors 62 // 63 // Output: 64 // v - Output vector (test functions) at quadrature points 65 // 66 // ----------------------------------------------------------------------------- 67 CEED_QFUNCTION(Mass3)(void *ctx, const CeedInt Q, 68 const CeedScalar *const *in, CeedScalar *const *out) { 69 const CeedScalar *u = in[0], *q_data = in[1]; 70 CeedScalar *v = out[0]; 71 72 // Quadrature Point Loop 73 CeedPragmaSIMD 74 for (CeedInt i=0; i<Q; i++) { 75 // Component 1 76 v[i+0*Q] = q_data[i] * u[i+0*Q]; 77 // Component 2 78 v[i+1*Q] = q_data[i] * u[i+1*Q]; 79 // Component 3 80 v[i+2*Q] = q_data[i] * u[i+2*Q]; 81 } // End of Quadrature Point Loop 82 return 0; 83 } 84 // ----------------------------------------------------------------------------- 85 86 #endif // bp2_h 87