/**
* ****************************************************************************
* Copyright (c) 2010-2016 by Min Cai (min.cai.china@gmail.com).
* <p>
* This file is part of the Archimulator multicore architectural simulator.
* <p>
* Archimulator is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* <p>
* Archimulator is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* <p>
* You should have received a copy of the GNU General Public License
* along with Archimulator. If not, see <http://www.gnu.org/licenses/>.
* ****************************************************************************
*/
package archimulator.core;
import java.util.ArrayList;
import java.util.List;
/**
* Physical register file.
*
* @author Min Cai
*/
public class PhysicalRegisterFile {
private String name;
private List<PhysicalRegister> registers;
private int numFreePhysicalRegisters;
/**
* Create a physical register file.
*
* @param name the name of the physical register file
* @param capacity the capacity
*/
public PhysicalRegisterFile(String name, int capacity) {
this.name = name;
this.registers = new ArrayList<>();
for (int i = 0; i < capacity; i++) {
this.registers.add(new PhysicalRegister(this));
}
this.setNumFreePhysicalRegisters(capacity);
}
/**
* Allocate a physical register for the specified dependency.
*
* @param dependency the dependency
* @return the newly allocated physical register for the specified dependency
*/
public PhysicalRegister allocate(int dependency) {
for (PhysicalRegister physReg : this.registers) {
if (physReg.getState() == PhysicalRegisterState.AVAILABLE) {
physReg.allocate(dependency);
return physReg;
}
}
throw new IllegalArgumentException();
}
/**
* Get a value indicating whether the physical register file is full or not.
*
* @return a value indicating whether the physical register file is full or not
*/
public boolean isFull() {
return this.numFreePhysicalRegisters == 0;
}
/**
* Get the name of the physical register file.
*
* @return the name of the physical register file
*/
public String getName() {
return name;
}
/**
* Get the list of physical registers.
*
* @return the list of physical registers
*/
public List<PhysicalRegister> getRegisters() {
return registers;
}
/**
* Get the number of free physical registers.
*
* @return the number of free physical registers
*/
public int getNumFreePhysicalRegisters() {
return numFreePhysicalRegisters;
}
/**
* Set the number of free physical registers.
*
* @param numFreePhysicalRegisters the number of free physical registers
*/
public void setNumFreePhysicalRegisters(int numFreePhysicalRegisters) {
this.numFreePhysicalRegisters = numFreePhysicalRegisters;
}
}