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 __CUDACC__ 21 # include <math.h> 22 #endif 23 24 // ----------------------------------------------------------------------------- 25 CEED_QFUNCTION(SetupMassGeo)(void *ctx, const CeedInt Q, 26 const CeedScalar *const *in, 27 CeedScalar *const *out) { 28 const CeedScalar *J = in[0], *w = in[1]; 29 CeedScalar *qdata = out[0]; 30 31 // Quadrature Point Loop 32 CeedPragmaSIMD 33 for (CeedInt i=0; i<Q; i++) { 34 const CeedScalar det = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 35 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 36 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])); 37 qdata[i] = det * w[i]; 38 } // End of Quadrature Point Loop 39 return 0; 40 } 41 42 // ----------------------------------------------------------------------------- 43 CEED_QFUNCTION(SetupMassRhs)(void *ctx, const CeedInt Q, 44 const CeedScalar *const *in, 45 CeedScalar *const *out) { 46 const CeedScalar *x = in[0], *J = in[1], *w = in[2]; 47 CeedScalar *true_soln = out[0], *rhs = out[1]; 48 49 // Quadrature Point Loop 50 CeedPragmaSIMD 51 for (CeedInt i=0; i<Q; i++) { 52 const CeedScalar det = (J[i+Q*0]*(J[i+Q*4]*J[i+Q*8] - J[i+Q*5]*J[i+Q*7]) - 53 J[i+Q*1]*(J[i+Q*3]*J[i+Q*8] - J[i+Q*5]*J[i+Q*6]) + 54 J[i+Q*2]*(J[i+Q*3]*J[i+Q*7] - J[i+Q*4]*J[i+Q*6])); 55 56 true_soln[i] = sqrt(x[i]*x[i] + x[i+Q]*x[i+Q] + x[i+2*Q]*x[i+2*Q]); 57 58 rhs[i] = det * w[i] * true_soln[i]; 59 } // End of Quadrature Point Loop 60 return 0; 61 } 62 63 // ----------------------------------------------------------------------------- 64 CEED_QFUNCTION(Mass)(void *ctx, const CeedInt Q, 65 const CeedScalar *const *in, CeedScalar *const *out) { 66 const CeedScalar *u = in[0], *qdata = in[1]; 67 CeedScalar *v = out[0]; 68 69 // Quadrature Point Loop 70 CeedPragmaSIMD 71 for (CeedInt i=0; i<Q; i++) 72 v[i] = qdata[i] * u[i]; 73 74 return 0; 75 } 76 // ----------------------------------------------------------------------------- 77