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