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 #include <string.h> 18 #include "ceed-ref.h" 19 20 int CeedTensorContractApply_Ref(CeedTensorContract contract, CeedInt A, 21 CeedInt B, CeedInt C, CeedInt J, 22 const CeedScalar *restrict t, 23 CeedTransposeMode tmode, const CeedInt Add, 24 const CeedScalar *restrict u, 25 CeedScalar *restrict v) { 26 CeedInt tstride0 = B, tstride1 = 1; 27 if (tmode == CEED_TRANSPOSE) { 28 tstride0 = 1; tstride1 = J; 29 } 30 31 if (!Add) 32 for (CeedInt q=0; q<A*J*C; q++) 33 v[q] = (CeedScalar) 0.0; 34 35 for (CeedInt a=0; a<A; a++) 36 for (CeedInt b=0; b<B; b++) 37 for (CeedInt j=0; j<J; j++) { 38 CeedScalar tq = t[j*tstride0 + b*tstride1]; 39 for (CeedInt c=0; c<C; c++) 40 v[(a*J+j)*C+c] += tq * u[(a*B+b)*C+c]; 41 } 42 return 0; 43 } 44 45 static int CeedTensorContractDestroy_Ref(CeedTensorContract contract) { 46 return 0; 47 } 48 49 int CeedTensorContractCreate_Ref(CeedBasis basis, CeedTensorContract contract) { 50 int ierr; 51 Ceed ceed; 52 ierr = CeedTensorContractGetCeed(contract, &ceed); CeedChk(ierr); 53 54 ierr = CeedSetBackendFunction(ceed, "TensorContract", contract, "Apply", 55 CeedTensorContractApply_Ref); CeedChk(ierr); 56 ierr = CeedSetBackendFunction(ceed, "TensorContract", contract, "Destroy", 57 CeedTensorContractDestroy_Ref); CeedChk(ierr); 58 59 return 0; 60 } 61