/**
* ****************************************************************************
* 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.uncore.noc.routing;
import archimulator.uncore.noc.Direction;
import archimulator.uncore.noc.Node;
import java.util.ArrayList;
import java.util.List;
/**
* XY routing algorithm.
*
* @author Min Cai
*/
public class XYRoutingAlgorithm extends AbstractRoutingAlgorithm {
/**
* Create an XY routing algorithm for the specified node.
*
* @param node the parent node
*/
public XYRoutingAlgorithm(Node node) {
super(node);
}
/**
* Get the list of directions for deriving the next hop of the upcoming packet.
*
* @param src the source node ID
* @param dest the destination node ID
* @param parent the parent node ID
* @return the next hop
*/
@Override
public List<Direction> nextHop(int src, int dest, int parent) {
List<Direction> directions = new ArrayList<>();
int destX = Node.getX(getNode().getNetwork(), dest);
int destY = Node.getY(getNode().getNetwork(), dest);
if(destX != getNode().getX()) {
if(destX > getNode().getX()) {
directions.add(Direction.EAST);
} else {
directions.add(Direction.WEST);
}
} else {
if(destY > getNode().getY()) {
directions.add(Direction.SOUTH);
} else {
directions.add(Direction.NORTH);
}
}
return directions;
}
}