1 // Copyright (c) 2017-2024, 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 #include <ceed.h> 9 #include <ceed/backend.h> 10 11 #include "ceed-ref.h" 12 13 //------------------------------------------------------------------------------ 14 // Tensor Contract Apply 15 //------------------------------------------------------------------------------ 16 static int CeedTensorContractApply_Ref(CeedTensorContract contract, CeedInt A, CeedInt B, CeedInt C, CeedInt J, const CeedScalar *restrict t, 17 CeedTransposeMode t_mode, const CeedInt add, const CeedScalar *restrict u, CeedScalar *restrict v) { 18 CeedInt t_stride_0 = B, t_stride_1 = 1; 19 20 if (t_mode == CEED_TRANSPOSE) { 21 t_stride_0 = 1; 22 t_stride_1 = J; 23 } 24 25 if (!add) { 26 for (CeedInt q = 0; q < A * J * C; q++) v[q] = (CeedScalar)0.0; 27 } 28 29 for (CeedInt a = 0; a < A; a++) { 30 for (CeedInt b = 0; b < B; b++) { 31 for (CeedInt j = 0; j < J; j++) { 32 CeedScalar tq = t[j * t_stride_0 + b * t_stride_1]; 33 for (CeedInt c = 0; c < C; c++) v[(a * J + j) * C + c] += tq * u[(a * B + b) * C + c]; 34 } 35 } 36 } 37 return CEED_ERROR_SUCCESS; 38 } 39 40 //------------------------------------------------------------------------------ 41 // Tensor Contract Destroy 42 //------------------------------------------------------------------------------ 43 static int CeedTensorContractDestroy_Ref(CeedTensorContract contract) { return CEED_ERROR_SUCCESS; } 44 45 //------------------------------------------------------------------------------ 46 // Tensor Contract Create 47 //------------------------------------------------------------------------------ 48 int CeedTensorContractCreate_Ref(CeedTensorContract contract) { 49 Ceed ceed; 50 51 CeedCallBackend(CeedTensorContractGetCeed(contract, &ceed)); 52 CeedCallBackend(CeedSetBackendFunction(ceed, "TensorContract", contract, "Apply", CeedTensorContractApply_Ref)); 53 CeedCallBackend(CeedSetBackendFunction(ceed, "TensorContract", contract, "Destroy", CeedTensorContractDestroy_Ref)); 54 return CEED_ERROR_SUCCESS; 55 } 56 57 //------------------------------------------------------------------------------ 58