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 #include <ceed.h> 18 #include <ceed-backend.h> 19 #include <ceed-impl.h> 20 21 /// @file 22 /// Implementation of CeedTensorContract interfaces 23 24 /// ---------------------------------------------------------------------------- 25 /// CeedTensorContract Backend API 26 /// ---------------------------------------------------------------------------- 27 /// @addtogroup CeedBasisBackend 28 /// @{ 29 30 /** 31 @brief Create a CeedTensorContract object for a CeedBasis 32 33 @param ceed A Ceed object where the CeedTensorContract will be created 34 @param basis CeedBasis for which the tensor contraction will be used 35 @param[out] contract Address of the variable where the newly created 36 CeedTensorContract will be stored. 37 38 @return An error code: 0 - success, otherwise - failure 39 40 @ref Backend 41 **/ 42 int CeedTensorContractCreate(Ceed ceed, CeedBasis basis, 43 CeedTensorContract *contract) { 44 int ierr; 45 46 if (!ceed->TensorContractCreate) { 47 Ceed delegate; 48 ierr = CeedGetObjectDelegate(ceed, &delegate, "TensorContract"); 49 CeedChk(ierr); 50 51 if (!delegate) 52 // LCOV_EXCL_START 53 return CeedError(ceed, 1, "Backend does not support TensorContractCreate"); 54 // LCOV_EXCL_STOP 55 56 ierr = CeedTensorContractCreate(delegate, basis, contract); 57 CeedChk(ierr); 58 return 0; 59 } 60 61 ierr = CeedCalloc(1,contract); CeedChk(ierr); 62 63 (*contract)->ceed = ceed; 64 ceed->refcount++; 65 ierr = ceed->TensorContractCreate(basis, *contract); 66 CeedChk(ierr); 67 return 0; 68 } 69 70 /** 71 @brief Apply tensor contraction 72 73 Contracts on the middle index 74 NOTRANSPOSE: v_ajc = t_jb u_abc 75 TRANSPOSE: v_ajc = t_bj u_abc 76 If add != 0, "=" is replaced by "+=" 77 78 @param contract CeedTensorContract to use 79 @param A First index of u, v 80 @param B Middle index of u, one index of t 81 @param C Last index of u, v 82 @param J Middle index of v, one index of t 83 @param[in] t Tensor array to contract against 84 @param tmode Transpose mode for t, \ref CEED_NOTRANSPOSE for t_jb 85 \ref CEED_TRANSPOSE for t_bj 86 @param add Add mode 87 @param[in] u Input array 88 @param[out] v Output array 89 90 @return An error code: 0 - success, otherwise - failure 91 92 @ref Backend 93 **/ 94 int CeedTensorContractApply(CeedTensorContract contract, CeedInt A, CeedInt B, 95 CeedInt C, CeedInt J, const CeedScalar *restrict t, 96 CeedTransposeMode tmode, const CeedInt add, 97 const CeedScalar *restrict u, 98 CeedScalar *restrict v) { 99 int ierr; 100 101 ierr = contract->Apply(contract, A, B, C, J, t, tmode, add, u, v); 102 CeedChk(ierr); 103 return 0; 104 } 105 106 /** 107 @brief Get Ceed associated with a CeedTensorContract 108 109 @param contract CeedTensorContract 110 @param[out] ceed Variable to store Ceed 111 112 @return An error code: 0 - success, otherwise - failure 113 114 @ref Backend 115 **/ 116 int CeedTensorContractGetCeed(CeedTensorContract contract, Ceed *ceed) { 117 *ceed = contract->ceed; 118 return 0; 119 } 120 121 /** 122 @brief Get backend data of a CeedTensorContract 123 124 @param contract CeedTensorContract 125 @param[out] data Variable to store data 126 127 @return An error code: 0 - success, otherwise - failure 128 129 @ref Backend 130 **/ 131 int CeedTensorContractGetData(CeedTensorContract contract, void *data) { 132 *(void **)data = contract->data; 133 return 0; 134 } 135 136 /** 137 @brief Set backend data of a CeedTensorContract 138 139 @param[out] contract CeedTensorContract 140 @param data Data to set 141 142 @return An error code: 0 - success, otherwise - failure 143 144 @ref Backend 145 **/ 146 int CeedTensorContractSetData(CeedTensorContract contract, void *data) { 147 contract->data = data; 148 return 0; 149 } 150 151 /** 152 @brief Destroy a CeedTensorContract 153 154 @param contract CeedTensorContract to destroy 155 156 @return An error code: 0 - success, otherwise - failure 157 158 @ref Backend 159 **/ 160 int CeedTensorContractDestroy(CeedTensorContract *contract) { 161 int ierr; 162 163 if (!*contract || --(*contract)->refcount > 0) return 0; 164 if ((*contract)->Destroy) { 165 ierr = (*contract)->Destroy(*contract); CeedChk(ierr); 166 } 167 ierr = CeedDestroy(&(*contract)->ceed); CeedChk(ierr); 168 ierr = CeedFree(contract); CeedChk(ierr); 169 return 0; 170 } 171 172 /// @} 173