1 // Copyright (c) 2017-2022, 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 mass operator example using PETSc 10 11 #ifndef bp1_h 12 #define bp1_h 13 14 #include <math.h> 15 16 // ----------------------------------------------------------------------------- 17 // This QFunction sets up the geometric factors required to apply the 18 // mass operator 19 // 20 // The quadrature data is stored in the array q_data. 21 // 22 // We require the determinant of the Jacobian to properly compute integrals of 23 // the form: int( u v ) 24 // 25 // Qdata: det_J * w 26 // 27 // ----------------------------------------------------------------------------- 28 CEED_QFUNCTION(SetupMassGeo)(void *ctx, const CeedInt Q, 29 const CeedScalar *const *in, 30 CeedScalar *const *out) { 31 const CeedScalar *J = in[1], *w = in[2]; // Note: *X = in[0] 32 CeedScalar *q_data = out[0]; 33 34 // Quadrature Point Loop 35 CeedPragmaSIMD 36 for (CeedInt i=0; i<Q; i++) { 37 const CeedScalar det_J = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 38 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 39 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])); 40 q_data[i] = det_J * w[i]; 41 } // End of Quadrature Point Loop 42 return 0; 43 } 44 45 // ----------------------------------------------------------------------------- 46 // This QFunction sets up the rhs and true solution for the problem 47 // ----------------------------------------------------------------------------- 48 CEED_QFUNCTION(SetupMassRhs)(void *ctx, const CeedInt Q, 49 const CeedScalar *const *in, 50 CeedScalar *const *out) { 51 const CeedScalar *x = in[0], *w = in[1]; 52 CeedScalar *true_soln = out[0], *rhs = out[1]; 53 54 // Quadrature Point Loop 55 CeedPragmaSIMD 56 for (CeedInt i=0; i<Q; i++) { 57 true_soln[i] = sqrt(x[i]*x[i] + x[i+Q]*x[i+Q] + x[i+2*Q]*x[i+2*Q]); 58 rhs[i] = w[i] * true_soln[i]; 59 } // End of Quadrature Point Loop 60 return 0; 61 } 62 63 // ----------------------------------------------------------------------------- 64 // This QFunction applies the mass operator for a scalar field. 65 // 66 // Inputs: 67 // u - Input vector at quadrature points 68 // q_data - Geometric factors 69 // 70 // Output: 71 // v - Output vector (test functions) at quadrature points 72 // 73 // ----------------------------------------------------------------------------- 74 CEED_QFUNCTION(Mass)(void *ctx, const CeedInt Q, 75 const CeedScalar *const *in, CeedScalar *const *out) { 76 const CeedScalar *u = in[0], *q_data = in[1]; 77 CeedScalar *v = out[0]; 78 79 // Quadrature Point Loop 80 CeedPragmaSIMD 81 for (CeedInt i=0; i<Q; i++) 82 v[i] = q_data[i] * u[i]; 83 84 return 0; 85 } 86 // ----------------------------------------------------------------------------- 87 88 #endif // bp1_h 89