00001 // 00002 // Copyright (c) 2005-2008 Kenichi Watanabe. 00003 // Copyright (c) 2005-2008 Yasuhiro Watari. 00004 // Copyright (c) 2005-2008 Hironori Ichibayashi. 00005 // Copyright (c) 2008-2009 Kazuo Horio. 00006 // Copyright (c) 2009-2013 Naruki Kurata. 00007 // Copyright (c) 2005-2013 Ryota Shioya. 00008 // Copyright (c) 2005-2013 Masahiro Goshima. 00009 // 00010 // This software is provided 'as-is', without any express or implied 00011 // warranty. In no event will the authors be held liable for any damages 00012 // arising from the use of this software. 00013 // 00014 // Permission is granted to anyone to use this software for any purpose, 00015 // including commercial applications, and to alter it and redistribute it 00016 // freely, subject to the following restrictions: 00017 // 00018 // 1. The origin of this software must not be misrepresented; you must not 00019 // claim that you wrote the original software. If you use this software 00020 // in a product, an acknowledgment in the product documentation would be 00021 // appreciated but is not required. 00022 // 00023 // 2. Altered source versions must be plainly marked as such, and must not be 00024 // misrepresented as being the original software. 00025 // 00026 // 3. This notice may not be removed or altered from any source 00027 // distribution. 00028 // 00029 // 00030 00031 00032 #include <pch.h> 00033 00034 #include "Sim/Predictor/BPred/GlobalHistory.h" 00035 #include "Utility/RuntimeError.h" 00036 00037 using namespace Onikiri; 00038 00039 GlobalHistory::GlobalHistory() : 00040 m_checkpointMaster(0) 00041 { 00042 } 00043 00044 GlobalHistory::~GlobalHistory() 00045 { 00046 ReleaseParam(); 00047 } 00048 00049 void GlobalHistory::Initialize(InitPhase phase) 00050 { 00051 if(phase == INIT_POST_CONNECTION){ 00052 CheckNodeInitialized( "checkpointMaster", m_checkpointMaster ); 00053 00054 m_globalHistory.Initialize( 00055 m_checkpointMaster, 00056 CheckpointMaster::SLOT_FETCH 00057 ); 00058 *m_globalHistory = 0; 00059 } 00060 } 00061 00062 // dirpred \\ bpred 00063 void GlobalHistory::Predicted(bool taken) 00064 { 00065 *m_globalHistory = ( (*m_globalHistory) << 1 ) | (taken ? 1 : 0); 00066 } 00067 00068 // RetireTaken/NotTaken bpred 00069 // GlobalHistoryXV\/\~XosAタ 00070 void GlobalHistory::Retired(bool taken) 00071 { 00072 } 00073 00074 // rbg(1V)(I)X 00075 // \~X\wKg 00076 void GlobalHistory::SetLeastSignificantBit(bool taken) 00077 { 00078 *m_globalHistory = shttl::deposit(*m_globalHistory, 0, 1, taken); 00079 } 00080 00081 // GlobalHistory 00082 u64 GlobalHistory::GetHistory() 00083 { 00084 return *m_globalHistory; 00085 }