src/Sim/Pipeline/Scheduler/IssueSelector/AgeIssueSelector.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/Pipeline/Scheduler/IssueSelector/AgeIssueSelector.h"
00035 #include "Sim/Op/Op.h"
00036 
00037 using namespace Onikiri;
00038 
00039 AgeIssueSelector::AgeIssueSelector()
00040 {
00041 
00042 }
00043 
00044 AgeIssueSelector::~AgeIssueSelector()
00045 {
00046 
00047 }
00048 
00049 void AgeIssueSelector::Initialize( InitPhase phase )
00050 {
00051 }
00052 
00053 void AgeIssueSelector::Finalize()
00054 {
00055     ReleaseParam();
00056 }
00057 
00058 void AgeIssueSelector::EvaluateSelect( Scheduler* scheduler )
00059 {
00060     // Select issued ops.
00061     int issueCount = 0;
00062     int issueWidth = scheduler->GetIssueWidth();
00063 
00064     const OpList& readyOps = scheduler->GetReadyOps();
00065     const SchedulingOps& wokeUpOps = scheduler->GetWokeUpOps();
00066 
00067     OpList::const_iterator          r = readyOps.begin();
00068     SchedulingOps::const_iterator   w = wokeUpOps.begin();
00069 
00070     while( issueCount < issueWidth ){
00071         OpIterator selected;
00072 
00073         // AgeIssueSelector selects the oldest ops from ready ops on issue.
00074         if( r != readyOps.end() && w != wokeUpOps.end() ){
00075             // There are both of ready ops and woke-up ops.
00076             if( (*r)->GetGlobalSerialID() < (*w)->GetGlobalSerialID() ){
00077                 selected = *r;  ++r;
00078             }
00079             else{
00080                 selected = *w;  ++w;
00081             }
00082         }
00083         else if( r != readyOps.end() ){
00084             // There are only ready ops.
00085             selected = *r;  ++r;
00086         }
00087         else if( w != wokeUpOps.end() ){
00088             // There are only woke-up ops.
00089             selected = *w;  ++w;
00090         }
00091         else{
00092             // No op can be selected.
00093             break;
00094         }
00095 
00096         if( scheduler->CanSelect( selected ) ) {
00097             scheduler->ReserveSelect( selected );
00098             ++issueCount;
00099         }
00100         else{
00101             g_dumper.Dump( DS_WAITING_UNIT, selected );
00102         }
00103     }
00104 }

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