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package com.zylin.zpu.stats;
import com.zylin.zpu.simulator.Machine;
import com.zylin.zpu.simulator.State;
public class StatKeeper
{
private Instruction top=new Instruction();
private int trackPos;
private State[] state = new State[3];
private Machine simulator;
/**
* @param simulator
*/
public StatKeeper(Machine simulator)
{
this.simulator=simulator;
for (int i=0; i<state.length; i++)
{
state[i]=new State();
}
}
/**
* this instruction has been retired. Count it.
*/
public void countInstruction(int instruction)
{
State currentState=state[trackPos%state.length];
currentState.cycle=simulator.getPrevCycles(); // start of instruction
currentState.insn=instruction;
trackPos++;
int backtrackNum;
backtrackNum=Math.min(trackPos, state.length);
for (int i=0; i<backtrackNum; i++)
{
Instruction t=top;
for (int j=0; j<=i; j++)
{
currentState=state[(trackPos-backtrackNum+j)%state.length];
t=t.addInstruction(currentState.insn);
}
t.count++;
}
}
public void printStats()
{
top.printStats();
}
}
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