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00032 #include <pch.h>
00033
00034 #include "Sim/Predictor/BPred/RAS.h"
00035 #include "Sim/ISAInfo.h"
00036 #include "Sim/Foundation/SimPC.h"
00037
00038 using namespace Onikiri;
00039
00040 RAS::RAS()
00041 {
00042 m_checkpointMaster = 0;
00043 }
00044
00045 RAS::~RAS()
00046 {
00047 ReleaseParam();
00048 }
00049
00050 void RAS::Initialize(InitPhase phase)
00051 {
00052 if(phase == INIT_PRE_CONNECTION){
00053 LoadParam();
00054
00055 ASSERT(m_stackSize >= MAX_BACKUP_SIZE,
00056 "The size of backup of RAS must be the same or smaller than that of RAS itself.");
00057
00058 ASSERT(MAX_BACKUP_SIZE > 0,
00059 "MAX_BACKUP_SIZE must be larger than 0.");
00060
00061
00062 m_stack.resize( m_stackSize, PC() );
00063 }
00064 else if(phase == INIT_POST_CONNECTION){
00065
00066
00067 CheckNodeInitialized( "checkpointMaster", m_checkpointMaster );
00068
00069 m_stackTop.Initialize(
00070 m_checkpointMaster,
00071 CheckpointMaster::SLOT_FETCH
00072 );
00073 *m_stackTop = 0;
00074
00075 m_backupStackTop.Initialize(
00076 m_checkpointMaster,
00077 CheckpointMaster::SLOT_FETCH
00078 );
00079 *m_backupStackTop = 0;
00080 m_backupStack.Initialize(
00081 m_checkpointMaster,
00082 CheckpointMaster::SLOT_FETCH
00083 );
00084
00085 }
00086
00087 }
00088
00089
00090 void RAS::Push(const SimPC& pc)
00091 {
00092 if (m_enableBackup)
00093 {
00094
00095 int setRasStackPos = PointStackPos(*m_stackTop, GetStackSize(), -MAX_BACKUP_SIZE);
00096 m_stack[setRasStackPos] = (*m_backupStack)[*m_backupStackTop];
00097
00098
00099 (*m_backupStack)[*m_backupStackTop] = pc.Next();
00100 *m_backupStackTop = PointStackPos(*m_backupStackTop, MAX_BACKUP_SIZE, 1);
00101 }
00102
00103
00104 m_stack[*m_stackTop] = pc.Next();
00105 *m_stackTop = PointStackPos(*m_stackTop, GetStackSize(), 1);
00106 }
00107
00108
00109 SimPC RAS::Pop()
00110 {
00111
00112 *m_stackTop = PointStackPos(*m_stackTop, GetStackSize(), -1);
00113 PC popPC = m_stack[*m_stackTop];
00114
00115 if ( m_enableBackup )
00116 {
00117
00118 *m_backupStackTop = PointStackPos(*m_backupStackTop, MAX_BACKUP_SIZE, -1);
00119 popPC = (*m_backupStack)[*m_backupStackTop];
00120
00121
00122 int setBackupStackPos = PointStackPos(*m_stackTop, GetStackSize(), -MAX_BACKUP_SIZE);
00123 (*m_backupStack)[*m_backupStackTop] = m_stack[setBackupStackPos];
00124 }
00125
00126 return popPC;
00127 }