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 <ceed.h> 15 #include <math.h> 16 17 // ----------------------------------------------------------------------------- 18 // This QFunction sets up the geometric factors required to apply the 19 // mass operator 20 // 21 // The quadrature data is stored in the array q_data. 22 // 23 // We require the determinant of the Jacobian to properly compute integrals of 24 // the form: int( u v ) 25 // 26 // Qdata: det_J * w 27 // 28 // ----------------------------------------------------------------------------- 29 CEED_QFUNCTION(SetupMassGeo)(void *ctx, const CeedInt Q, 30 const CeedScalar *const *in, 31 CeedScalar *const *out) { 32 const CeedScalar *J = in[1], *w = in[2]; // Note: *X = in[0] 33 CeedScalar *q_data = out[0]; 34 35 // Quadrature Point Loop 36 CeedPragmaSIMD 37 for (CeedInt i=0; i<Q; i++) { 38 const CeedScalar det_J = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 39 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 40 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])); 41 q_data[i] = det_J * w[i]; 42 } // End of Quadrature Point Loop 43 return 0; 44 } 45 46 // ----------------------------------------------------------------------------- 47 // This QFunction sets up the rhs and true solution for the problem 48 // ----------------------------------------------------------------------------- 49 CEED_QFUNCTION(SetupMassRhs)(void *ctx, const CeedInt Q, 50 const CeedScalar *const *in, 51 CeedScalar *const *out) { 52 const CeedScalar *x = in[0], *w = in[1]; 53 CeedScalar *true_soln = out[0], *rhs = out[1]; 54 55 // Quadrature Point Loop 56 CeedPragmaSIMD 57 for (CeedInt i=0; i<Q; i++) { 58 true_soln[i] = sqrt(x[i]*x[i] + x[i+Q]*x[i+Q] + x[i+2*Q]*x[i+2*Q]); 59 rhs[i] = w[i] * true_soln[i]; 60 } // End of Quadrature Point Loop 61 return 0; 62 } 63 64 // ----------------------------------------------------------------------------- 65 // This QFunction applies the mass operator for a scalar field. 66 // 67 // Inputs: 68 // u - Input vector at quadrature points 69 // q_data - Geometric factors 70 // 71 // Output: 72 // v - Output vector (test functions) at quadrature points 73 // 74 // ----------------------------------------------------------------------------- 75 CEED_QFUNCTION(Mass)(void *ctx, const CeedInt Q, 76 const CeedScalar *const *in, CeedScalar *const *out) { 77 const CeedScalar *u = in[0], *q_data = in[1]; 78 CeedScalar *v = out[0]; 79 80 // Quadrature Point Loop 81 CeedPragmaSIMD 82 for (CeedInt i=0; i<Q; i++) 83 v[i] = q_data[i] * u[i]; 84 85 return 0; 86 } 87 // ----------------------------------------------------------------------------- 88 89 #endif // bp1_h 90