com.sun.electric.tool.routing.RoutingFrame Maven / Gradle / Ivy
/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: RoutingFrame.java
*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) 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.
*
* Electric(tm) 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.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.routing;
import com.sun.electric.database.EditingPreferences;
import com.sun.electric.database.geometry.PolyBase;
import com.sun.electric.database.hierarchy.Cell;
import com.sun.electric.database.hierarchy.Export;
import com.sun.electric.database.hierarchy.HierarchyEnumerator;
import com.sun.electric.database.hierarchy.Nodable;
import com.sun.electric.database.network.Netlist;
import com.sun.electric.database.network.Network;
import com.sun.electric.database.text.PrefPackage;
import com.sun.electric.database.topology.ArcInst;
import com.sun.electric.database.topology.Connection;
import com.sun.electric.database.topology.Geometric;
import com.sun.electric.database.topology.NodeInst;
import com.sun.electric.database.topology.PortInst;
import com.sun.electric.database.variable.VarContext;
import com.sun.electric.technology.ArcProto;
import com.sun.electric.technology.DRCTemplate;
import com.sun.electric.technology.EdgeH;
import com.sun.electric.technology.EdgeV;
import com.sun.electric.technology.Layer;
import com.sun.electric.technology.PrimitiveNode;
import com.sun.electric.technology.PrimitivePort;
import com.sun.electric.technology.Technology;
import com.sun.electric.technology.Technology.NodeLayer;
import com.sun.electric.technology.technologies.Generic;
import com.sun.electric.tool.drc.DRC;
import com.sun.electric.util.ElapseTimer;
import com.sun.electric.util.math.FixpTransform;
import com.sun.electric.util.math.MutableDouble;
import com.sun.electric.util.math.Orientation;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.prefs.Preferences;
/**
* Class to define a framework for Routing algorithms. To make Routing
* algorithms easier to write, Routing algorithms can extend this class. The
* Routing algorithm does this by defining two methods:
*
* String getAlgorithmName() Returns the name of the Routing algorithm.
*
* void runRouting(Cell cell, List segmentsToRoute,
* List allLayers, List allContacts,
* List blockages) Routes Electric Cell "cell" (this is not
* required, but may be useful for highlighting). The List "segmentsToRoute"
* defines all of the routes that must be made. The List "allLayers" defines the
* layers that can be used in routing (the Metal layers). The List "allContacts"
* defines the layer-to-layer contacts that can be used in routing. The List
* "blockages" defines existing geometry that must be routed-around. Routes are
* defined by calling, for each RoutingSegment, the methods "addWire()" and
* "addContact()".
*
* To avoid the complexities of the Electric database, these shadow-classes are
* defined to describe the necessary information that routing algorithms want:
*
* RoutingSegment defines a segment that must be routed. RoutingEnd defines the
* ends of a RoutingSegment. RoutingLayer defines the layers that are used in
* routing. RoutingGeometry defines a piece of geometry on a given RoutingLayer.
* RoutingContact defines a particular type of contact between routing arcs for
* layer changes. RoutingParameter is a way for code to store preference values
* persistently.
*
* These classes exist to define a solved route: RoutePoint defines a point in
* the finished route. RouteWire defines a wire between two RoutePoint objects
* in the finished route.
*/
public abstract class RoutingFrame {
private static final boolean DEBUGROUTES = false;
/**
* Static list of all Routing algorithms. When you create a new algorithm,
* add it to the following list.
*/
private static RoutingFrame[] routingAlgorithms = {
new com.sun.electric.tool.routing.experimentalAStar1.AStarRoutingFrame(), // Team 1
new com.sun.electric.tool.routing.experimentalAStar2.AStarRouter(), // Team 3v2
new com.sun.electric.tool.routing.experimentalAStar3.AStarRouter(), // Team 3v1
new com.sun.electric.tool.routing.experimentalLeeMoore1.yana(), // Team 6
new com.sun.electric.tool.routing.experimentalLeeMoore2.RoutingFrameLeeMoore(), // Team 4
new com.sun.electric.tool.routing.experimentalLeeMoore3.RoutingFrameLeeMoore(), // Team 2
};
/**
* Method to return a list of all Routing algorithms.
*
* @return a list of all Routing algorithms.
*/
public static RoutingFrame[] getRoutingAlgorithms() {
return routingAlgorithms;
}
/**
* Method to do Routing (overridden by actual Routing algorithms).
*
* @param segmentsToRoute a list of all routes that need to be made.
* @param allLayers a list of all layers that can be used in routing.
* @param allContacts a list of all contacts that can be used in routing.
* @param blockages a list of all blockage geometry to consider.
*/
protected void runRouting(Cell cell, List segmentsToRoute, List allLayers,
List allContacts, List blockages) {}
/**
* Method to return the name of the routing algorithm (overridden by actual
* Routing algorithms).
*
* @return the name of the routing algorithm.
*/
public String getAlgorithmName() {
return "?";
}
/**
* Method to return a list of parameters for this routing algorithm.
*
* @return a list of parameters for this routing algorithm.
*/
public List getParameters() {
return allParameters;
}
private ArrayList allParameters = new ArrayList();
public static class RoutingPrefs extends PrefPackage {
private Object[][] values;
private final static String NODE_NAME = "tool/rooting";
public RoutingPrefs(boolean factory) {
super(factory);
Preferences prefs = (factory ? getFactoryPrefRoot() : getPrefRoot()).node(NODE_NAME);
values = new Object[routingAlgorithms.length][];
for (int i = 0; i < values.length; i++) {
RoutingFrame rf = routingAlgorithms[i];
values[i] = new Object[rf.allParameters.size()];
for (int j = 0; j < rf.allParameters.size(); j++) {
RoutingParameter par = rf.allParameters.get(j);
String key = rf.getAlgorithmName() + "-" + par.key;
Object value;
switch (par.type) {
case RoutingParameter.TYPEINTEGER:
value = Integer.valueOf(prefs.getInt(key, ((Integer)par.factoryValue).intValue()));
break;
case RoutingParameter.TYPESTRING:
value = String.valueOf(prefs.get(key, (String)par.factoryValue));
break;
case RoutingParameter.TYPEDOUBLE:
value = Double.valueOf(prefs.getDouble(key, ((Double)par.factoryValue).doubleValue()));
break;
case RoutingParameter.TYPEBOOLEAN:
value = Boolean.valueOf(prefs.getBoolean(key, ((Boolean)par.factoryValue).booleanValue()));
break;
default:
throw new AssertionError();
}
if (value.equals(par.factoryValue)) {
value = par.factoryValue;
}
values[i][j] = value;
}
}
}
/**
* Store annotated option fields of the subclass into the specified Preferences subtree.
* @param prefRoot the root of the Preferences subtree.
* @param removeDefaults remove from the Preferences subtree options which have factory default value.
*/
@Override
protected void putPrefs(Preferences prefRoot, boolean removeDefaults) {
super.putPrefs(prefRoot, removeDefaults);
Preferences prefs = prefRoot.node(NODE_NAME);
assert values.length == routingAlgorithms.length;
for (int i = 0; i < values.length; i++) {
RoutingFrame rf = routingAlgorithms[i];
assert values[i].length == rf.allParameters.size();
for (int j = 0; j < rf.allParameters.size(); j++) {
RoutingParameter par = rf.allParameters.get(j);
String key = rf.getAlgorithmName() + "-" + par.key;
Object v = values[i][j];
if (removeDefaults && v.equals(par.factoryValue)) {
prefs.remove(key);
} else {
switch (par.type) {
case RoutingParameter.TYPEINTEGER:
prefs.putInt(key, ((Integer)v).intValue());
break;
case RoutingParameter.TYPESTRING:
prefs.put(key, (String)v);
break;
case RoutingParameter.TYPEDOUBLE:
prefs.putDouble(key, ((Double)v).doubleValue());
break;
case RoutingParameter.TYPEBOOLEAN:
prefs.putBoolean(key, ((Boolean)v).booleanValue());
break;
default:
throw new AssertionError();
}
}
}
}
}
public Object getParameter(RoutingParameter par) {
int i = indexOfFrame(par);
RoutingFrame rf = routingAlgorithms[i];
int j = rf.indexOfParameter(par.key);
return values[i][j];
}
public RoutingPrefs withParameter(RoutingParameter par, Object value) {
int i = indexOfFrame(par);
RoutingFrame rf = routingAlgorithms[i];
int j = rf.indexOfParameter(par.key);
Object oldValue = values[i][j];
if (oldValue.equals(value)) {
return this;
}
assert value.getClass() == par.factoryValue.getClass();
if (value.equals(par.factoryValue))
value = par.factoryValue;
Object[] vs = values[i].clone();
vs[j] = value;
Object[][] newValues = values.clone();
newValues[i] = vs;
return (RoutingPrefs)withField("values", newValues);
}
private int indexOfFrame(RoutingParameter par) {
RoutingFrame rf = par.getOwner();
for (int i = 0; i < routingAlgorithms.length; i++) {
if (rf.getClass() == routingAlgorithms[i].getClass()) return i;
}
return -1;
}
}
private int indexOfParameter(String parameterKey) {
for (int j = 0; j < allParameters.size(); j++) {
if (parameterKey.equals(allParameters.get(j).key))
return j;
}
return -1;
}
/**
* Class to define a parameter for a routing algorithm.
*/
public class RoutingParameter {
public static final int TYPEINTEGER = 1;
public static final int TYPESTRING = 2;
public static final int TYPEDOUBLE = 3;
public static final int TYPEBOOLEAN = 4;
private final String key;
private final String title;
private final Object factoryValue;
private Object cachedValue;
private final int type;
private int tempInt;
private String tempString;
private double tempDouble;
private boolean tempBoolean;
private boolean tempValueSet;
/**
* Constructor to create an integer routing parameter.
*
* @param name the parameter name (should be simple, no spaces).
* @param title the title of the parameter (used in the Preferences dialog).
* @param factory the default value of the parameter.
*/
public RoutingParameter(String name, String title, int factory) {
key = getAlgorithmName() + "-" + name;
this.title = title;
cachedValue = factoryValue = Integer.valueOf(factory);
type = TYPEINTEGER;
tempValueSet = false;
allParameters.add(this);
}
/**
* Constructor to create a String routing parameter.
*
* @param name the parameter name (should be simple, no spaces).
* @param title the title of the parameter (used in the Preferences dialog).
* @param factory the default value of the parameter.
*/
public RoutingParameter(String name, String title, String factory) {
key = getAlgorithmName() + "-" + name;
this.title = title;
cachedValue = factoryValue = String.valueOf(factory);
type = TYPESTRING;
tempValueSet = false;
allParameters.add(this);
}
/**
* Constructor to create a double routing parameter.
*
* @param name the parameter name (should be simple, no spaces).
* @param title the title of the parameter (used in the Preferences dialog).
* @param factory the default value of the parameter.
*/
public RoutingParameter(String name, String title, double factory) {
key = getAlgorithmName() + "-" + name;
this.title = title;
cachedValue = factoryValue = Double.valueOf(factory);
type = TYPEDOUBLE;
tempValueSet = false;
allParameters.add(this);
}
/**
* Constructor to create a boolean routing parameter.
*
* @param name the parameter name (should be simple, no spaces).
* @param title the title of the parameter (used in the Preferences dialog).
* @param factory the default value of the parameter.
*/
public RoutingParameter(String name, String title, boolean factory) {
key = getAlgorithmName() + "-" + name;
this.title = title;
cachedValue = factoryValue = Boolean.valueOf(factory);
type = TYPEBOOLEAN;
tempValueSet = false;
allParameters.add(this);
}
public RoutingFrame getOwner() {
return RoutingFrame.this;
}
public String getName() {
return title;
}
public int getType() {
return type;
}
/**
* Method to get the current Parameter value for an integer.
*
* @return the current Parameter value for an integer.
*/
public int getIntValue() {
return ((Integer)cachedValue).intValue();
}
/**
* Method to get the current Parameter value for a String.
*
* @return the current Parameter value for a String.
*/
public String getStringValue() {
return (String)cachedValue;
}
/**
* Method to get the current Parameter value for a double.
*
* @return the current Parameter value for an double.
*/
public double getDoubleValue() {
return ((Double)cachedValue).doubleValue();
}
/**
* Method to get the current Parameter value for a boolean.
*
* @return the current Parameter value for a boolean.
*/
public boolean getBooleanValue() {
return ((Boolean)cachedValue).booleanValue();
}
private void setValue(Object value) {
assert value.getClass() == factoryValue.getClass();
if (value.equals(factoryValue))
value = factoryValue;
cachedValue = value;
}
/******************** TEMP VALUES DURING THE PREFERENCES DIALOG ********************/
public int getTempIntValue() {
return tempInt;
}
public String getTempStringValue() {
return tempString;
}
public double getTempDoubleValue() {
return tempDouble;
}
public boolean getTempBooleanValue() {
return tempBoolean;
}
public void setTempIntValue(int i) {
tempInt = i;
tempValueSet = true;
}
public void setTempStringValue(String s) {
tempString = s;
tempValueSet = true;
}
public void setTempDoubleValue(double d) {
tempDouble = d;
tempValueSet = true;
}
public void setTempBooleanValue(boolean d) {
tempBoolean = d;
tempValueSet = true;
}
public boolean hasTempValue() {
return tempValueSet;
}
public void clearTempValue() {
tempValueSet = false;
}
}
/**
* Class to define a layer that can be routed.
*/
public static class RoutingLayer {
private Layer layer;
private ArcProto ap;
private double minWidth;
private double maxSurround;
private Map minSpacing;
private RoutingContact pin;
private boolean isMetal;
/**
* Method to create a RoutingLayer object.
*
* @param layer the Electric Layer associated with this RoutingLayer.
* @param ap the Electric ArcProto associated with this RoutingLayer
* (only valid for via layers).
* @param ep EditingPreferences with default sizes
* @param minWidth the minimum width of wires on this RoutingLayer (only
* valid for via layers).
* @param maxSurround the maximum DRC rule around this RoutingLayer.
*/
public RoutingLayer(Layer layer, ArcProto ap, EditingPreferences ep, double minWidth, double maxSurround) {
this.layer = layer;
this.ap = ap;
this.minWidth = minWidth;
this.maxSurround = maxSurround;
isMetal = layer.getFunction().isMetal();
minSpacing = new HashMap();
// add the pin information
if (ap != null) {
PrimitiveNode pinNP = ap.findPinProto();
pin = new RoutingContact(pinNP, ep, null, this, this, 0);
}
}
/**
* Method to return the name of this RoutingLayer.
*
* @return the name of this RoutingLayer.
*/
public String getName() {
return layer.getName();
}
/**
* Method to tell whether this layer is metal or via.
*
* @return true for Metal, false for a via.
*/
public boolean isMetal() {
return isMetal;
}
/**
* Method to return the metal layer number of this RoutingLayer. Only
* valid when this layer is Metal (not Via).
*
* @return the metal layer number (Metal-1 returns 1, etc.)
*/
public int getMetalNumber() {
return layer.getFunction().getLevel();
}
/**
* Method to return the proper RoutingContact to use when joining two of
* these layers. Pins are different than contacts: they have no geometry
* and are just virtual connection points, whereas contacts have
* geometry on two different metal layers as well as on a via layer in
* order to connect the two metals. This is only valid for metal layers
* (returns null for via layers).
*
* @return the proper RoutingContact to use when joining two of these layers.
*/
public RoutingContact getPin() {
return pin;
}
/**
* Method to return the minimum width of wires on this RoutingLayer.
* Most wires should be created with this width. Some wires can be made
* wider if they are connecting to larger objects. This is only valid
* for metal layers (returns 0 for via layers).
*
* @return the minimum width of wires on this RoutingLayer.
*/
public double getMinWidth() {
return minWidth;
}
/**
* Method to return the maximum DRC surround for this RoutingLayer. All
* design rules that involve this layer will be less than or equal to
* this value, so examining geometry in the vicinity of this layer only
* needs to look this far.
*
* @return the maximum DRC surround for this RoutingLayer.
*/
public double getMaxSurround() {
return maxSurround;
}
/**
* Method to return the minimum spacing between this and another
* RoutingLayer.
*
* @param other the other RoutingLayer.
* @return the minimum distance that the two RoutingLayer objects must
* stay apart to avoid design-rule violations.
*/
public double getMinSpacing(RoutingLayer other) {
Double dist = minSpacing.get(other);
if (dist == null)
return 0;
return dist.doubleValue();
}
}
/**
* Class to define geometry in a RoutingContact and a RoutingNode.
*/
public static class RoutingGeometry {
private RoutingLayer layer;
private Rectangle2D bounds;
private int netID;
/**
* Method to create a RoutingGeometry object.
*
* @param layer the RoutingLayer on which this RoutingGeometry resides.
* @param bounds the shape of this RoutingGeometry.
* @param netID the global network number of this RoutingGeometry.
*/
public RoutingGeometry(RoutingLayer layer, Rectangle2D bounds, int netID) {
this.layer = layer;
this.bounds = bounds;
this.netID = netID;
}
/**
* Method to return the RoutingLayer that this piece of RoutingGeometry
* uses.
*
* @return the RoutingLayer that this piece of RoutingGeometry uses.
*/
public RoutingLayer getLayer() {
return layer;
}
/**
* Method to return the shape of this RoutingGeometry. The meaning of
* the shape varies depending on the context of this RoutingGeometry.
* When found in a RoutingContact, the shape is based on the center of
* the contact.
*
* @return the shape of this RoutingGeometry.
*/
public Rectangle2D getBounds() {
return bounds;
}
/**
* Method to return the global network index of this RoutingGeometry.
* These numbers help determine whether two pieces of geometry are on
* the same electrical network or not.
*
* @return the global network index of this RoutingGeometry.
*/
public int getNetID() {
return netID;
}
}
/**
* Class to define a contact that can be used for routing.
*/
public static class RoutingContact {
private PrimitiveNode np;
private List layers;
private RoutingLayer first, second;
private double viaSpacing;
private double defWidth, defHeight;
/** a special RoutingContact that defines the start of a segment */
public static RoutingContact STARTPOINT = new RoutingContact(null, null, null, null, null, 0);
/** a special RoutingContact that defines the end of a segment */
public static RoutingContact FINISHPOINT = new RoutingContact(null, null, null, null, null, 0);
/**
* Method to create a RoutingContact object.
*
* @param np the PrimitiveNode associated with this RoutingContact.
* @param ep EditingPrefrences with default sizes
* @param layers the geometry that composes this RoutingContact.
* @param first the first layer that this RoutingContact connects.
* @param second the second layer that this RoutingContact connects.
* @param viaSpacing the center-to-center minimum spacing of the vias in this RoutingContact.
*/
public RoutingContact(PrimitiveNode np, EditingPreferences ep, List layers, RoutingLayer first, RoutingLayer second,
double viaSpacing) {
this.np = np;
this.layers = layers;
this.first = first;
this.second = second;
this.viaSpacing = viaSpacing;
if (np != null) {
this.defWidth = np.getDefWidth(ep);
this.defHeight = np.getDefHeight(ep);
}
}
/**
* Method to return the name of this RoutingContact. This is useful for debugging.
*
* @return the name of this RoutingContact.
*/
public String getName() {
if (this == STARTPOINT)
return "START-POINT";
if (this == FINISHPOINT)
return "FINISH-POINT";
return np.describe(false);
}
/**
* Method to return a List of pieces of RoutingGeometry that compose
* this RoutingContact. Each piece of RoutingGeometry has coordinates
* that are relative to the center of the contact.
*
* @return a List of pieces of RoutingGeometry that compose this RoutingContact.
*/
public List getGeometry() {
return layers;
}
/**
* Method to return the first RoutingLayer that this RoutingContact
* connects. Each RoutingContact connects two different RoutingLayers.
*
* @return the first RoutingLayer that this RoutingContact connects.
*/
public RoutingLayer getFirstLayer() {
return first;
}
/**
* Method to return the second RoutingLayer that this RoutingContact
* connects. Each RoutingContact connects two different RoutingLayers.
*
* @return the second RoutingLayer that this RoutingContact connects.
*/
public RoutingLayer getSecondLayer() {
return second;
}
/**
* Method to return the minimum spacing between vias of this
* RoutingContact. When two contacts are nearby, the center coordinates
* of their vias must be separated by this distance.
*
* @return the minimum spacing between vias of this RoutingContact.
*/
public double getViaSpacing() {
return viaSpacing;
}
/**
* Method to return the default width of this RoutingContact. Since this
* framework doesn't handle larger-than-normal contacts, this is
* actually the only width.
*
* @return the default width of this RoutingContact.
*/
public double getDefWidth() {
return defWidth;
}
/**
* Method to return the default height of this RoutingContact. Since
* this framework doesn't handle larger-than-normal contacts, this is
* actually the only height.
*
* @return the default height of this RoutingContact.
*/
public double getDefHeight() {
return defHeight;
}
}
/**
* Class to define an end of a RoutingSegment.
*/
public static class RoutingEnd {
private PortInst pi;
private Point2D location;
/**
* Constructor for building an end of a RoutingSegment.
*
* @param pi the Electric PortInst that is at this end of the route.
*/
public RoutingEnd(PortInst pi) {
this.pi = pi;
location = pi.getCenter();
}
/**
* Method to return the coordinates of this RoutingEnd.
*
* @return the coordinates of this RoutingEnd.
*/
public Point2D getLocation() {
return location;
}
/**
* Method to return a description of this RoutingEnd. The description
* (for debugging) has the name of the Electric node and port.
*
* @return a description of this RoutingEnd.
*/
public String describe() {
return pi.getPortProto().getName() + " of node " + pi.getNodeInst().describe(false);
}
}
/**
* Class to define a desired route that should be created.
*/
public static class RoutingSegment {
private RoutingEnd startEnd, finishEnd;
private List startLayers, finishLayers;
private double startWidestArc, finishWidestArc;
private List routedPoints;
private List routedWires;
private String netName;
private int netID;
private List thingsToDelete;
/**
* Constructor to create a RoutingSegment.
*/
public RoutingSegment(RoutingEnd startEnd, List startLayers, RoutingEnd finishEnd,
List finishLayers, int netID, String netName, List thingsToDelete) {
this.startLayers = startLayers;
this.startEnd = startEnd;
this.startWidestArc = getWidestMetalArcOnPort(startEnd.pi);
this.finishLayers = finishLayers;
this.finishEnd = finishEnd;
this.finishWidestArc = getWidestMetalArcOnPort(finishEnd.pi);
this.netID = netID;
this.netName = netName;
this.thingsToDelete = thingsToDelete;
routedPoints = new ArrayList();
routedWires = new ArrayList();
}
/**
* Method to return the starting RoutingEnd of this RoutingSegment. Each
* RoutingSegment has a start and finish end that must be connected.
*
* @return the starting RoutingEnd of this RoutingSegment.
*/
public RoutingEnd getStartEnd() {
return startEnd;
}
/**
* Method to return a List of RoutingLayers that may connect to the
* starting end of this RoutingSegment. Typically only one RoutingLayer
* can connect, but if the starting point is a contact, then two layers
* may connect.
*
* @return a List of RoutingLayers that may connect to the starting end
* of this RoutingSegment.
*/
public List getStartLayers() {
return startLayers;
}
/**
* Method to return the widest arc that is connected to the starting
* end. Routers should run wider wires when connecting here.
*
* @return the widest arc that is connected to the starting end.
*/
public double getWidestArcAtStart() {
return startWidestArc;
}
/**
* Method to return the ending RoutingEnd of this RoutingSegment. Each
* RoutingSegment has a start and finish end that must be connected.
*
* @return the ending RoutingEnd of this RoutingSegment.
*/
public RoutingEnd getFinishEnd() {
return finishEnd;
}
/**
* Method to return a List of RoutingLayers that may connect to the
* finish end of this RoutingSegment. Typically only one RoutingLayer
* can connect, but if the finish point is a contact, then two layers
* may connect.
*
* @return a List of RoutingLayers that may connect to the finish end of
* this RoutingSegment.
*/
public List getFinishLayers() {
return finishLayers;
}
/**
* Method to return the widest arc that is connected to the finish end.
* Routers should run wider wires when connecting here.
*
* @return the widest arc that is connected to the finish end.
*/
public double getWidestArcAtFinish() {
return finishWidestArc;
}
/**
* Method to return the global network identifier for this
* RoutingSegment. These numbers help determine what is connected (when
* they have the same NetID).
*
* @return the global network identifier for this RoutingSegment.
*/
public int getNetID() {
return netID;
}
/**
* Method to return the name of this RoutingSegment. This is for debugging.
*
* @return the name of this RoutingSegment.
*/
public String getNetName() {
return netName;
}
/**
* Method to define a wire segment that is part of the final route.
* Routers must call this method and the "addWireEnd()" method to define
* the actual route.
*
* @param rw a wire segment that is part of the final route.
*/
public void addWire(RouteWire rw) {
routedWires.add(rw);
}
/**
* Method to define a wire end that is part of the final route. Routers
* must call this method and the "addWire()" method to define the actual
* route.
*
* @param rp a contact that is part of the final route.
*/
public void addWireEnd(RoutePoint rp) {
routedPoints.add(rp);
}
/**
* Method to return the widest metal arc already connected to a given
* PortInst. Looks recursively down the hierarchy.
*
* @param pi the PortInst to connect.
* @return the widest metal arc connect to that port (zero if none)
*/
private double getWidestMetalArcOnPort(PortInst pi) {
// first check the top level
double width = 0;
for (Iterator it = pi.getConnections(); it.hasNext();) {
Connection c = it.next();
ArcInst ai = c.getArc();
if (!ai.getProto().getFunction().isMetal())
continue;
double newWidth = ai.getLambdaBaseWidth();
if (newWidth > width)
width = newWidth;
}
// now recurse down the hierarchy
NodeInst ni = pi.getNodeInst();
if (ni.isCellInstance()) {
Export export = (Export) pi.getPortProto();
PortInst exportedInst = export.getOriginalPort();
double width2 = getWidestMetalArcOnPort(exportedInst);
if (width2 > width)
width = width2;
}
return width;
}
}
/**
* Class to define a wire in the final routing of a RoutingSegment.
*/
public static class RouteWire {
private RoutingLayer layer;
private RoutePoint start, end;
private double width;
/**
* Constructor for defining a wire in the final routing.
*
* @param layer the RoutingLayer on which this wire resides.
* @param start a RoutePoint that defines the start of the wire.
* @param end a RoutePoint that defines the finish of the wire.
* @param width the width of the wire.
*/
public RouteWire(RoutingLayer layer, RoutePoint start, RoutePoint end, double width) {
this.layer = layer;
this.start = start;
this.end = end;
this.width = width;
}
}
/**
* Class to define a point in the final routing of a RoutingSegment.
*/
public static class RoutePoint {
private RoutingContact contact;
private Point2D loc;
private int angle;
/**
* Constructor to create a RoutePoint in the final routing.
*
* @param contact the RoutingContact to place at this point. For the ends of
* the RoutingSegment, use RoutingContact.STARTPOINT and RoutingContact.FINISHPOINT.
* @param loc the coordinates of this RoutePoint.
* @param angle the rotation of the RoutingContact (in degrees).
*/
public RoutePoint(RoutingContact contact, Point2D loc, int angle) {
this.contact = contact;
this.loc = loc;
this.angle = angle;
}
/**
* Method to return the RoutingContact that is to be placed at this RoutePoint.
*
* @return the RoutingContact that is to be placed at this RoutePoint.
*/
public RoutingContact getContact() {
return contact;
}
/**
* Method to return the coordinates of this RoutePoint.
*
* @return the coordinates of this RoutePoint.
*/
public Point2D getLocation() {
return loc;
}
}
/**
* Entry point to do Routing of a Cell, called by Electric to do routing.
* Gathers the requirements for Routing into a collection of shadow objects
* (RoutingNode, RoutingSegment, etc.) then invokes "runRouting()" to route
* and finally places the routed geometry.
*
* @param cell the Cell to route.
* @param ep EditingPrefrences with default sizes and text descriptors
* @param routingOptions routing preferences
* @return the number of segments that were routed.
*/
public int doRouting(Cell cell, EditingPreferences ep, RoutingFrame.RoutingPrefs routingOptions) {
// get network information for the Cell
Netlist netList = cell.getNetlist();
if (netList == null) {
System.out
.println("Sorry, a deadlock aborted routing (network information unavailable). Please try again");
return 0;
}
// create all of the RoutingLayer objects
Map routingLayers = new HashMap();
List allLayers = new ArrayList();
Technology tech = cell.getTechnology();
MutableDouble mutableDist = new MutableDouble(0);
for (Iterator it = tech.getArcs(); it.hasNext();) {
ArcProto ap = it.next();
if (!ap.getFunction().isMetal())
continue;
Layer layer = ap.getLayer(0);
double minWidth = ap.getDefaultLambdaBaseWidth(ep);
DRC.getMaxSurround(layer, Double.MAX_VALUE, mutableDist);
double maxSurround = mutableDist.doubleValue();
RoutingLayer rl = new RoutingLayer(layer, ap, ep, minWidth, maxSurround);
routingLayers.put(layer, rl);
allLayers.add(rl);
}
for (Iterator it = tech.getLayers(); it.hasNext();) {
Layer layer = it.next();
if (!layer.getFunction().isContact())
continue;
if (layer.getFunction().getLevel() == 0)
continue;
DRC.getMaxSurround(layer, Double.MAX_VALUE, mutableDist);
double maxSurround = mutableDist.doubleValue();
RoutingLayer rl = new RoutingLayer(layer, null, ep, 0, maxSurround);
routingLayers.put(layer, rl);
allLayers.add(rl);
}
// now fill in all of the design rules
for (RoutingLayer rl : allLayers) {
Layer layer = rl.layer;
for (RoutingLayer oRl : allLayers) {
Layer oLayer = oRl.layer;
// advanced design-rules for wider-than-normal geometry is not
// implemented in this framework
double width = 3;
double length = 50;
DRCTemplate rule = DRC.getSpacingRule(layer, null, oLayer, null, false, -1, width, length);
if (rule != null)
rl.minSpacing.put(oRl, new Double(rule.getValue(0)));
}
}
// create all of the RoutingContact objects
List allContacts = new ArrayList();
for (Iterator it = tech.getNodes(); it.hasNext();) {
PrimitiveNode pnp = it.next();
if (pnp.getFunction() != PrimitiveNode.Function.CONTACT)
continue;
List contactGeom = new ArrayList();
NodeLayer[] nLayers = pnp.getNodeLayers();
Layer cutLayer = null;
double width = pnp.getDefWidth(ep);
double height = pnp.getDefHeight(ep);
for (int i = 0; i < nLayers.length; i++) {
Layer lay = nLayers[i].getLayer();
if (lay.getFunction().isContact()) {
cutLayer = lay;
continue;
}
RoutingLayer rl = routingLayers.get(lay);
if (rl == null)
continue;
EdgeH left = nLayers[i].getLeftEdge();
double leftSide = left.getAdder().getLambda() + left.getMultiplier() * width;
EdgeH right = nLayers[i].getRightEdge();
double rightSide = right.getAdder().getLambda() + right.getMultiplier() * width;
EdgeV top = nLayers[i].getTopEdge();
double topSide = top.getAdder().getLambda() + top.getMultiplier() * height;
EdgeV bot = nLayers[i].getBottomEdge();
double botSide = bot.getAdder().getLambda() + bot.getMultiplier() * height;
Rectangle2D bounds = new Rectangle2D.Double(leftSide, topSide, rightSide - leftSide, botSide - topSide);
RoutingGeometry rg = new RoutingGeometry(rl, bounds, 0);
contactGeom.add(rg);
}
RoutingLayer first = null, second = null;
PrimitivePort pp = pnp.getPort(0);
ArcProto[] arcs = pp.getConnections();
for (int i = 0; i < arcs.length; i++) {
if (arcs[i].getTechnology() == Generic.tech())
continue;
for (int j = 0; j < arcs[i].getNumArcLayers(); j++) {
Layer lay = arcs[i].getLayer(j);
RoutingLayer rl = routingLayers.get(lay);
if (rl == null)
continue;
if (first == null)
first = rl;
else if (second == null)
second = rl;
}
}
if (first != null && second != null && cutLayer != null) {
// determine via surround
double spacing = 2;
// advanced design-rules for wider-than-normal geometry is not
// implemented in this framework
double arcWidth = 3;
double arcLength = 50;
DRCTemplate ruleSpacing = DRC.getSpacingRule(cutLayer, null, cutLayer, null, false, -1, arcWidth,
arcLength);
if (ruleSpacing != null)
spacing = ruleSpacing.getValue(0);
// determine cut size
double cutWidth = 0;
DRCTemplate ruleWidth = DRC.getMinValue(cutLayer, DRCTemplate.DRCRuleType.NODSIZ);
if (ruleWidth != null)
cutWidth = ruleWidth.getValue(0);
double viaSurround = spacing + cutWidth;
RoutingContact rc = new RoutingContact(pnp, ep, contactGeom, first, second, viaSurround);
allContacts.add(rc);
}
}
// define all of the nodes in the cell and the arc geometry at the top
// level
List blockages = new ArrayList();
Map netIDs = new HashMap();
GeometryVisitor visitor = new GeometryVisitor(routingLayers, blockages, netIDs);
HierarchyEnumerator.enumerateCell(cell, VarContext.globalContext, visitor);
// create the RoutingSegment objects from the Unrouted arcs in the Cell
List segmentsToRoute = new ArrayList();
for (Iterator it = cell.getArcs(); it.hasNext();) {
ArcInst ai = it.next();
if (ai.getProto() != Generic.tech().unrouted_arc)
continue;
List startLayers = new ArrayList();
ArcProto[] startArcs = ai.getHeadPortInst().getPortProto().getBasePort().getConnections();
for (int i = 0; i < startArcs.length; i++) {
if (startArcs[i].getTechnology() == Generic.tech())
continue;
for (int j = 0; j < startArcs[i].getNumArcLayers(); j++) {
Layer lay = startArcs[i].getLayer(j);
RoutingLayer rl = routingLayers.get(lay);
if (rl != null)
startLayers.add(rl);
}
}
List finishLayers = new ArrayList();
ArcProto[] endArcs = ai.getTailPortInst().getPortProto().getBasePort().getConnections();
for (int i = 0; i < endArcs.length; i++) {
if (endArcs[i].getTechnology() == Generic.tech())
continue;
for (int j = 0; j < endArcs[i].getNumArcLayers(); j++) {
Layer lay = endArcs[i].getLayer(j);
RoutingLayer rl = routingLayers.get(lay);
if (rl != null)
finishLayers.add(rl);
}
}
RoutingEnd startPI = new RoutingEnd(ai.getHeadPortInst());
RoutingEnd finishPI = new RoutingEnd(ai.getTailPortInst());
List thingsToDelete = new ArrayList();
thingsToDelete.add(ai);
Integer netID = netIDs.get(ai);
String netName = netList.getNetworkName(ai);
RoutingSegment rs = new RoutingSegment(startPI, startLayers, finishPI, finishLayers, netID == null ? 0
: netID.intValue(), netName, thingsToDelete);
segmentsToRoute.add(rs);
}
// prepare for routing
ElapseTimer timer = ElapseTimer.createInstance().start();
System.out.println("Running Routing on cell '" + cell.describe(false) + "' using the '" + getAlgorithmName()
+ "' algorithm");
// do the real work of Routing
for (RoutingParameter par: allParameters) {
par.setValue(routingOptions.getParameter(par));
}
runRouting(cell, segmentsToRoute, allLayers, allContacts, blockages);
// now implement the results
int numRouted = 0;
for (RoutingSegment rs : segmentsToRoute) {
// see if the route was created
List contacts = rs.routedPoints;
List wires = rs.routedWires;
if (contacts.isEmpty() && wires.isEmpty())
continue;
// display route
if (DEBUGROUTES) {
System.out.println("++++ ROUTING SEGMENT: ++++");
Map numberContacts = new HashMap();
int num = 1;
for (RoutePoint rp : contacts) {
RoutingContact rc = rp.getContact();
String contactName = "CONTACT-" + (num++);
System.out.println(contactName + " IS " + rc.getName() + " AT (" + rp.loc.getX() + ","
+ rp.loc.getY() + ")");
numberContacts.put(rp, contactName);
}
for (RouteWire rw : wires) {
String start = numberContacts.get(rw.start);
String end = numberContacts.get(rw.end);
if (rw.start.getContact() == RoutingContact.STARTPOINT)
start = "STARTING-POINT";
if (rw.end.getContact() == RoutingContact.FINISHPOINT)
end = "ENDING-POINT";
System.out.println("WIRE " + rw.layer.getName() + " RUNS FROM " + start + " TO " + end);
}
}
// create the contacts
Map builtContacts = new HashMap();
for (RoutePoint rp : contacts) {
RoutingContact rc = rp.getContact();
if (rc == RoutingContact.FINISHPOINT || rc == RoutingContact.STARTPOINT)
continue;
Orientation orient = Orientation.fromAngle(rp.angle);
double width = rc.np.getDefWidth(ep);
double height = rc.np.getDefHeight(ep);
NodeInst ni = NodeInst.makeInstance(rc.np, ep, rp.loc, width, height, cell, orient, null);
builtContacts.put(rp, ni.getOnlyPortInst());
}
for (RouteWire rw : wires) {
RoutePoint start = rw.start;
PortInst startPI = builtContacts.get(start);
if (startPI == null) {
if (start.getContact() == RoutingContact.STARTPOINT)
startPI = rs.startEnd.pi;
else if (start.getContact() == RoutingContact.FINISHPOINT)
startPI = rs.finishEnd.pi;
if (startPI == null) {
System.out.println("CANNOT DETERMINE STARTING POINT OF WIRE");
}
}
RoutePoint finish = rw.end;
PortInst finishPI = builtContacts.get(finish);
if (finishPI == null) {
if (finish.getContact() == RoutingContact.STARTPOINT)
finishPI = rs.startEnd.pi;
else if (finish.getContact() == RoutingContact.FINISHPOINT)
finishPI = rs.finishEnd.pi;
if (finishPI == null) {
System.out.println("CANNOT DETERMINE ENDING POINT OF WIRE");
}
}
ArcProto ap = rw.layer.ap;
ArcInst ai = ArcInst.makeInstanceBase(ap, ep, rw.width, startPI, finishPI);
if (ai == null) {
System.out.println("FAILED TO RUN ARC");
} else {
if (start.loc.getX() != finish.loc.getX() && start.loc.getY() != finish.loc.getY())
ai.setFixedAngle(false);
}
}
// now delete the things to delete
for (Geometric geom : rs.thingsToDelete)
if (geom instanceof ArcInst)
((ArcInst) geom).kill();
for (Geometric geom : rs.thingsToDelete)
if (geom instanceof NodeInst)
((NodeInst) geom).kill();
numRouted++;
}
timer.end();
System.out.println("Routed " + numRouted + " out of " + segmentsToRoute.size() + " segments (took " + timer
+ ")");
return numRouted;
}
/**
* HierarchyEnumerator subclass to geometry and build shadow data structures
* for routing.
*/
private class GeometryVisitor extends HierarchyEnumerator.Visitor {
private Map routingLayers;
private List blockages;
private Map netIDs;
public GeometryVisitor(Map routingLayers, List blockages,
Map netIDs) {
this.routingLayers = routingLayers;
this.blockages = blockages;
this.netIDs = netIDs;
}
public boolean enterCell(HierarchyEnumerator.CellInfo info) {
return true;
}
public void exitCell(HierarchyEnumerator.CellInfo info) {
Cell cell = info.getCell();
Netlist nl = info.getNetlist();
FixpTransform trans = info.getTransformToRoot();
for (Iterator it = cell.getArcs(); it.hasNext();) {
ArcInst ai = it.next();
Technology tech = ai.getProto().getTechnology();
PolyBase[] polys = tech.getShapeOfArc(ai);
int netID = -1;
Network net = nl.getNetwork(ai, 0);
if (net != null)
netID = info.getNetID(net);
for (int i = 0; i < polys.length; i++) {
polys[i].transform(trans);
addGeometry(cell, polys[i], blockages, netID);
}
if (info.isRootCell() && ai.getProto() == Generic.tech().unrouted_arc)
netIDs.put(ai, new Integer(netID));
}
for (Iterator it = cell.getNodes(); it.hasNext();) {
NodeInst ni = it.next();
if (ni.isCellInstance())
continue;
if (ni.getFunction() == PrimitiveNode.Function.PIN)
continue;
FixpTransform nodeTrans = ni.rotateOut(trans);
Technology tech = ni.getProto().getTechnology();
PolyBase[] polys = tech.getShapeOfNode(ni, true, false, null);
for (int i = 0; i < polys.length; i++) {
PolyBase poly = polys[i];
poly.transform(nodeTrans);
int netID = -1;
if (poly.getPort() != null) {
Network net = nl.getNetwork(ni, poly.getPort(), 0);
if (net != null)
netID = info.getNetID(net);
}
addGeometry(cell, poly, blockages, netID);
}
}
}
public boolean visitNodeInst(Nodable no, HierarchyEnumerator.CellInfo info) {
return true;
}
private void addGeometry(Cell cell, PolyBase poly, List blockages, int netID) {
RoutingLayer rl = routingLayers.get(poly.getLayer());
if (rl == null)
return;
Rectangle2D bounds = poly.getBounds2D();
RoutingGeometry rg = new RoutingGeometry(rl, bounds, netID);
blockages.add(rg);
}
}
}
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