src/Sim/Predictor/BPred/PHT.cpp

説明を見る。
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/PHT.h"
00035 
00036 using namespace Onikiri;
00037 using namespace shttl;
00038 
00039 
00040 PHT::PHT() :
00041     m_counterBits(0), 
00042     m_entryBits(0)
00043 {
00044 }
00045 
00046 PHT::~PHT()
00047 {
00048     ReleaseParam();
00049 }
00050 
00051 void PHT::Initialize(InitPhase phase)
00052 {
00053     if(phase == INIT_PRE_CONNECTION){
00054         LoadParam();
00055         u8 max = (1 << m_counterBits) - 1;
00056         m_table.construct(
00057             1 << m_entryBits,   // size
00058             (max + 1) / 2,      // init
00059             0,                  // min
00060             max,                // max
00061             1,                  // add
00062             1,                  // sub
00063             (max + 1) / 2       // threshold
00064         );
00065     }
00066 }
00067 
00068 void PHT::Update(int index, bool taken)
00069 {
00070     if(taken)
00071         m_table[index].inc();
00072     else
00073         m_table[index].dec();
00074 }
00075 
00076 bool PHT::Predict(int index)
00077 {
00078     return m_table[index].above_threshold();
00079 }

Onikiri2に対してTue Jun 18 14:34:25 2013に生成されました。  doxygen 1.4.7