1/* 2 * Copyright 2019 Texas A&M University 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * 3. Neither the name of the copyright holder nor the names of its 15 * contributors may be used to endorse or promote products derived from this 16 * software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * Author: Daniel A. Jiménez 31 * Adapted to gem5 by: Javier Bueno Hedo 32 * 33 */ 34 35/* 36 * Multiperspective Perceptron Predictor with TAGE (by Daniel A. Jiménez) 37 * 64 KB version 38 */ 39#ifndef __CPU_PRED_MULTIPERSPECTIVE_PERCEPTRON_TAGE_64KB_HH__ 40#define __CPU_PRED_MULTIPERSPECTIVE_PERCEPTRON_TAGE_64KB_HH__ 41 42#include "cpu/pred/multiperspective_perceptron_tage.hh" 43#include "params/MPP_StatisticalCorrector_64KB.hh" 44#include "params/MultiperspectivePerceptronTAGE64KB.hh" 45 46class MPP_StatisticalCorrector_64KB : public MPP_StatisticalCorrector { 47 const unsigned numEntriesSecondLocalHistories; 48 const unsigned numEntriesThirdLocalHistories; 49 50 // Second local history GEHL 51 const unsigned snb; 52 const unsigned logSnb; 53 std::vector<int> sm; 54 std::vector<int8_t> * sgehl; 55 std::vector<int8_t> ws; 56 57 // Third local history GEHL 58 const unsigned tnb; 59 const unsigned logTnb; 60 std::vector<int> tm; 61 std::vector<int8_t> * tgehl; 62 std::vector<int8_t> wt; 63 64 StatisticalCorrector::SCThreadHistory *makeThreadHistory() override; 65 int gPredictions(ThreadID tid, Addr branch_pc, 66 StatisticalCorrector::BranchInfo* bi, int &lsum, int64_t phist) 67 override; 68 void getBiasLSUM(Addr branch_pc, 69 StatisticalCorrector::BranchInfo *bi, int &lsum) const override; 70 void gUpdates(ThreadID tid, Addr pc, bool taken, 71 StatisticalCorrector::BranchInfo* bi, int64_t phist) override; 72 void scHistoryUpdate(Addr branch_pc, const StaticInstPtr &inst, bool taken, 73 StatisticalCorrector::BranchInfo *bi, Addr corrTarget) override; 74 public: 75 MPP_StatisticalCorrector_64KB( 76 const MPP_StatisticalCorrector_64KBParams *p); 77 size_t getSizeInBits() const override; 78}; 79 80class MultiperspectivePerceptronTAGE64KB : 81 public MultiperspectivePerceptronTAGE { 82 void createSpecs() override; 83 public: 84 MultiperspectivePerceptronTAGE64KB( 85 const MultiperspectivePerceptronTAGE64KBParams *p); 86}; 87 88#endif // __CPU_PRED_MULTIPERSPECTIVE_PERCEPTRON_TAGE_64KB_HH__ 89