+++ /dev/null
-import com.atmel.fpslic.*;
-import byucc.edif.tools.merge.*;
-import byucc.edif.*;
-import java.io.*;
-import java.util.*;
-import edu.berkeley.slipway.*;
-import com.atmel.fpslic.*;
-import static com.atmel.fpslic.FpslicConstants.*;
-
-// FIXME: sometimes gets stuck in a loop routing the last few nets
-
-// FEATURE: ability to rip up only one branch of a multi-terminal net
-
-// FEATURE: re-placement based on routing congestion
-// note: must assign a cost to "bare wire" -- if not, the
-// placer will fail to recognize moves that put blocks closer
-// together, thereby decreasing the potential for future
-// congestion.
-
-// FEATURE: A* search (chap7 of independence thesis)
-
-// FIXME: distinguish out,xo,yo
-// FIXME: y-axis shortcuts
-// FEATURE: ability to use a cell for routing purposes
-// FEATURE: global two-sector-long wires
-
-public class MPARDemo {
-
- public static final double alphaParameter = 00.9;
- public static final double betaParameter = 02.5;
- public static final double gammaParameter = 1.0;
-
- public static class FlatNetlist {
-
- private HashMap<String,Integer> ids = new HashMap<String,Integer>();
-
- public HashSet<Node> nodes = new HashSet<Node>();
- public HashSet<Net> nets = new HashSet<Net>();
-
- /** a node is some primitive element; a potential configuration of a CLB */
- public class Node {
- public PhysicalDevice.PhysicalCell physicalCell = null;
- private final String type;
- private final int id;
-
- public int x = -1;
- public int y = -1;
-
- private HashMap<String,Port> ports = new HashMap<String,Port>();
-
- public Node(String type) {
- nodes.add(this);
- this.type = type.toLowerCase();
- Integer num = ids.get(type);
- this.id = num == null ? 0 : num.intValue();
- ids.put(type, this.id+1);
- }
- public String getType() { return type; }
- public String toString() {
- if (x==-1 || y==-1)
- return type + "["+id+"]";
- return type + "@("+x+","+y+")";
- }
- public Port getPort(String name, boolean driver) {
- Port p = ports.get(name);
- if (p==null) ports.put(name, p = new Port(name, driver));
- return p;
- }
-
- public Fpslic.Cell getPlacement(Fpslic fpslic) { return fpslic.cell(x, y); }
- public void place(Fpslic fpslic) {
- Fpslic.Cell cell = fpslic.cell(x,y);
- cell.c(XLUT);
- cell.b(false);
- cell.f(false);
- cell.xi(NW);
- cell.yi(EAST);
- if (type.equals("and2")) cell.xlut(LUT_SELF & LUT_OTHER);
- else if (type.equals("or2")) cell.xlut(LUT_SELF | LUT_OTHER);
- else if (type.equals("xor2")) cell.xlut(LUT_SELF ^ LUT_OTHER);
- else if (type.equals("buf")) cell.xlut(LUT_SELF);
- else if (type.equals("inv")) cell.xlut(~LUT_SELF);
- else if (type.equals("cell0")) return;
- }
-
- private int portIndex = 0;
-
- /** a port is an input or output to a Node */
- public class Port {
- private final String name;
- private final boolean driver;
- Net net;
- public final int index;
- public Port(String name, boolean driver) {
- this.name = name;
- this.driver = driver;
- this.index = driver ? 0 : portIndex++;
- }
- public String toString() { return Node.this + "." + name; }
- public Node getNode() { return Node.this; }
- public void connect(Port p) {
- if (net != null) { net.add(p);
- } else if (p.net != null) { p.net.add(this);
- } else {
- new Net().add(this);
- this.net.add(p);
- }
- }
- public void route(Fpslic fpslic, Port[] dests, PhysicalDevice pd, FlatNetlist.Net owner) {
- PhysicalDevice.PhysicalNet[] destsp = new PhysicalDevice.PhysicalNet[dests.length];
- for(int i=0; i<dests.length; i++) {
- Port dest = dests[i];
- switch(dest.index) {
- case 0: destsp[i] = dest.getNode().physicalCell.getNet("xi"); break;
- case 1: destsp[i] = dest.getNode().physicalCell.getNet("yi"); break;
- default: throw new Error();
- }
- }
- //System.out.println(physicalCell.getNet("out"));
- //System.out.println(destsp[0]);
- pd.route(physicalCell.getNet("out"), destsp, owner);
-
- /*
- Fpslic.Cell driverCell = fpslic.cell(getNode().x,getNode().y);
- Fpslic.Cell destCell = fpslic.cell(dest.getNode().x,dest.getNode().y);
- boolean[] hblocked = new boolean[5];
- boolean[] vblocked = new boolean[5];
- hblocked[3] = true;
- vblocked[3] = true;
- int minx = Math.min(getNode().x, dest.getNode().x);
- int miny = Math.min(getNode().y, dest.getNode().y);
- int maxx = Math.max(getNode().x, dest.getNode().x);
- int maxy = Math.max(getNode().y, dest.getNode().y);
- for(int cx = 0; cx <= 3; cx++) {
- Fpslic.Cell c = fpslic.cell(cx, getNode().y);
- for(int i=0; i<5; i++)
- hblocked[i] |= (c.hx(i) && !c.equals(driverCell));
- }
- for(int cy = 0; cy <= 3; cy++) {
- Fpslic.Cell c = fpslic.cell(dest.getNode().x, cy);
- for(int i=0; i<5; i++)
- vblocked[i] |= (c.vx(i) && !c.equals(driverCell));
- }
- int free = 0;
- for(; free < 5; free++) if (!hblocked[free]) break;
- for(; free < 5; free++) if (!vblocked[free]) break;
- if (free >= 5) throw new RuntimeException("unroutable!");
- Fpslic.Cell turnCell = fpslic.cell(dest.getNode().x, getNode().y);
- driverCell.out(free, true);
- driverCell.h(free, true);
- turnCell.h(free, true);
- turnCell.v(free, true);
- switch(dest.index) {
- case 0: destCell.xi(L0 + free); break;
- case 1: destCell.yi(L0 + free); break;
- case 2: destCell.wi(L0 + free); break;
- case 3: destCell.zi(L0 + free); break;
- default: throw new RuntimeException("error");
- }
- destCell.v(free, true);
- System.out.println("route " + this + " -> " + dest + " on planes " + free);
- */
- }
- }
- }
-
- /** a Net is a collection of ports which are wired together */
- public class Net implements Iterable<Node.Port> {
- private Node.Port driver = null;
- private HashSet<Node.Port> ports = new HashSet<Node.Port>();
- public Net() { nets.add(this); }
- public Iterator<Node.Port> iterator() { return ports.iterator(); }
- public int getSize() { return ports.size(); }
- public HashSet<PhysicalDevice.PhysicalPip> pips = new HashSet<PhysicalDevice.PhysicalPip>();
- public HashSet<PhysicalDevice.PhysicalNet> pns = new HashSet<PhysicalDevice.PhysicalNet>();
- public boolean routed = false;
- public void unroute() {
- for(PhysicalDevice.PhysicalPip pip : pips)
- pip.set(false);
- for(PhysicalDevice.PhysicalNet net : pns) {
- net.owners.remove(this);
- net.load--;
- }
- pips.clear();
- pns.clear();
- routed = false;
- }
- public void route(Fpslic fpslic, PhysicalDevice pd) {
- if (driver == null) return;
- if (routed) return;
- //System.out.println();
- //System.out.println("routing " + this);
- Node.Port[] dests = new Node.Port[ports.size() - (ports.contains(driver) ? 1 : 0)];
- int i = 0;
- for(Node.Port p : ports)
- if (p != driver)
- dests[i++] = p;
- driver.route(fpslic, dests, pd, this);
- routed = true;
- }
- public void add(Node.Port p) {
- if (p.driver) {
- if (driver != null && driver != p)
- throw new RuntimeException("two drivers on a port!\n "+driver+"\n "+p);
- driver = p;
- }
- if (p.net==this || ports.contains(p)) return;
- ports.add(p);
- add(p.net);
- p.net = this;
- }
- public void add(Net n) {
- if (n==this || n==null) return;
- for(Node.Port p : n) add(p);
- nets.remove(n);
- }
- public String toString() {
- StringBuffer ret = new StringBuffer();
- ret.append(driver==null ? "()" : driver.toString());
- ret.append(" -> ");
- for(Node.Port p : this)
- if (p!=driver)
- ret.append(p+" ");
- return ret.toString();
- }
- }
-
-
- public HashMap<EdifCellInstance,FlatNetlist.Node> cache =
- new HashMap<EdifCellInstance,FlatNetlist.Node>();
- public HashMap<String,FlatNetlist.Node> top =
- new HashMap<String,FlatNetlist.Node>();
-
- public FlatNetlist.Node createNode(EdifCellInstance eci, String portName) {
- FlatNetlist.Node n = eci==null ? top.get(portName) : cache.get(eci);
- if (n != null) return n;
- if (eci==null) {
- n = new FlatNetlist.Node("top_"+portName);
- top.put(portName, n);
- return n;
- } else {
- n = new FlatNetlist.Node(eci.getType());
- cache.put(eci,n);
- }
- for(EdifPortRef epr : eci.getAllEPRs()) {
- EdifPort ep = epr.getPort();
- EdifNet en = epr.getNet();
- String name = ep.getOldName();
- boolean driver = ep.getDirection()==ep.OUT;
- if (eci==null) driver = !driver;
- if (eci==null) name = driver ? "out" : "xi";
- FlatNetlist.Node.Port p = n.getPort(name, driver);
- for(EdifPortRef epr2 : en.getConnectedPortRefs()) {
- EdifCellInstance eci2 = epr2.getCellInstance();
- EdifPort ep2 = epr2.getPort();
- Node n2 = createNode(eci2, ep2.getOldName());
- driver = ep2.getDirection()==ep.OUT;
- name = ep2.getOldName();
- if (eci2==null) driver = !driver;
- if (eci2==null) name = driver ? "out" : "xi";
- FlatNetlist.Node.Port p2 = n2.getPort(name, driver);
- p.connect(p2);
- }
- }
- return n;
- }
- }
-
- /*
- test code for inter-sector switchboxes
- public static void main2() throws Exception {
- Fpslic fpslic = new FtdiBoard();
- // set up scan cell
- fpslic.cell(23,15).h(3, true);
- fpslic.cell(23,15).yi(L3);
- fpslic.cell(23,15).ylut(0xAA);
- fpslic.iob_right(15, true).enableOutput(WEST);
- fpslic.cell(23,0).ylut(0x00);
- fpslic.iob_right(0, true).enableOutput(WEST);
- fpslic.flush();
- for(int x=0; x<20; x++) {
- for(int y=0; y<20; y++) {
- for(int l=0; l<5; l++) {
- for(int v = 0; v <= 1; v++) {
- boolean vert = v==1;
- int newx = vert ? x : x-1;
- int newy = vert ? y-1 : y;
- if (newx<0 || newy<0) continue;
- if (vert && (y%4) != 0) continue;
- if (!vert && (x%4) != 0) continue;
-
- int layer = l;
- if (layer==3) continue;
- Fpslic.Cell c = fpslic.cell(x, y);
- Fpslic.Cell c2 = fpslic.cell(newx, newy);
- Fpslic.SectorWire sw1 = vert ? c.vwire(layer) : c.hwire(layer);
- Fpslic.SectorWire sw2 = vert ? c2.vwire(layer) : c2.hwire(layer);
- sw1.drives(sw2, true);
-
- c.c(YLUT);
- if (vert) c.v(L0 + layer, true);
- else c.h(L0 + layer, true);
- c.out(L0 + layer, true);
- c.b(false);
-
- c2.yi(L0 + layer);
- if (vert) c2.v(L0 + layer, true);
- else c2.h(L0 + layer, true);
- c2.ylut(LUT_SELF);
- c2.c(YLUT);
- c2.b(false);
-
- System.out.print(x+","+y+","+l+","+(vert?"v":"h")+": ");
- c.ylut(0x00);
- fpslic.flush();
- boolean good = scan(fpslic, c2)==0;
- if (!good) fails++;
- System.out.print(good ? "ok " : "bad ");
- c.ylut(0xff);
- fpslic.flush();
- good = scan(fpslic, c2)!=0;
- if (!good) fails++;
- System.out.print(good ? "ok " : "bad ");
- System.out.println();
- sw1.drives(sw2, false);
- if (vert) c.v(layer, false);
- else c.h(layer, false);
- c.out(layer, false);
- }
- }
- }
- }
- System.out.println("fails = " + fails);
-
- }
- public static int fails = 0;
- */
-
- public static void main(String[] s) throws Exception {
- EdifEnvironment topEnv = new EdifEnvironment("top");
- EdifLibraryManager elm = new EdifLibraryManager(topEnv);
- EdifLibrary initLib = new EdifLibrary(elm, "initLib");
- EdifEnvironment env = EdifMergeParser.parseAndMerge(s, initLib);
- System.out.println("top is " + env.getTopCell());
- FlatNetlist fnl = new FlatNetlist();
-
- for(Iterator<EdifCellInstance> it = (Iterator<EdifCellInstance>)env.getTopCell().cellInstanceIterator();
- it.hasNext();
- ) {
- FlatNetlist.Node n = fnl.createNode(it.next(), null);
- }
-
- Fpslic fpslic = new FtdiBoard();
- PhysicalDevice pd = new PhysicalDevice(fpslic, 20, 20);
-
- int px = 0;
- int py = 0;
-
- // crude map
- Random rand = new Random();
- boolean[][] used = new boolean[pd.width][pd.height];
- for(FlatNetlist.Node n : fnl.nodes) {
- while(true) {
- px = Math.abs(rand.nextInt()) % pd.width;
- py = Math.abs(rand.nextInt()) % pd.height;
- if (!used[px][py]) {
- used[px][py] = true;
- n.x = px;
- n.y = py;
- n.physicalCell = pd.getCell(px, py);
- System.out.println("placed " + n + " at ("+px+","+py+")");
- n.place(fpslic);
- break;
- }
- }
- }
-
- int trial = 0;
- HashSet<FlatNetlist.Net> needUnroute = new HashSet<FlatNetlist.Net>();
- while(true) {
- System.out.println();
- System.out.println("routing trial " + (++trial));
- for(FlatNetlist.Net net : fnl.nets) {
- if (net.getSize() <= 1) continue;
- net.route(fpslic, pd);
- }
- double congestion = 0;
- int overrouted = 0;
- needUnroute.clear();
- for(PhysicalDevice.PhysicalNet pn : pd.allPhysicalNets) {
- if (pn.load > 1) {
- //System.out.println("overrouted: " + pn + ", congestion="+pn.congestion + ", load=" + pn.load);
- overrouted++;
- congestion += pn.congestion;
- }
- pn.congestion = pn.congestion * alphaParameter;
- if (pn.load > 1) {
- pn.congestion += betaParameter;
- // don't do this here
- //pn.congestion += betaParameter;
- for(FlatNetlist.Net n : pn.owners)
- needUnroute.add(n);
- }
- }
- System.out.println(" overrouted="+overrouted+", congestion="+congestion +", ripping up " + needUnroute.size() +" nets of " + fnl.nets.size());
- if (overrouted <= 0) break;
- //for(FlatNetlist.Net net : fnl.nets)
- for(FlatNetlist.Net net : needUnroute)
- net.unroute();
- /*
- for(PhysicalDevice.PhysicalNet pn : pd.allPhysicalNets)
- for(PhysicalDevice.PhysicalPip pip : pn) {
- pip.set(false);
- }
- */
- }
-
- // set up scan cell
- fpslic.cell(23,15).h(3, true);
- fpslic.cell(23,15).yi(L3);
- fpslic.cell(23,15).ylut(0xAA);
- fpslic.iob_right(15, true).enableOutput(WEST);
- fpslic.cell(23,0).ylut(0x00);
- fpslic.iob_right(0, true).enableOutput(WEST);
- fpslic.flush();
-
- int width = 8;
- while(true) {
- int a = Math.abs(rand.nextInt()) % (1 << width);
- int b = Math.abs(rand.nextInt()) % (1 << width);
- setInput(fnl, fpslic, "a", a);
- setInput(fnl, fpslic, "b", b);
- setInput(fnl, fpslic, "ci", 0);
- int result = getOutput(fnl, fpslic, "out");
- System.out.println(Integer.toString(a,16) + " + " +
- Integer.toString(b,16) + " = " +
- Integer.toString(result,16) +
- " [ " + (a+b==result ? "ok" : "bad" ) + " ] ");
- }
- }
-
- public static class PhysicalDevice {
- private final Fpslic fpslic;
-
- public final int width;
- public final int height;
- private final PhysicalNet[][][][] sectorWires;
- private final PhysicalCell[][] cells;
-
- public PhysicalCell getCell(int col, int row) {
- if (col<0) return null;
- if (row<0) return null;
- if (col>=width) return null;
- if (row>=height) return null;
- return cells[col][row];
- }
-
- public PhysicalDevice(final Fpslic fpslic, int width, int height) {
- this.fpslic = fpslic;
- this.width = width;
- this.height = height;
- sectorWires = new PhysicalNet[width][height][5][2];
- for(int x=0; x<width; x+=4)
- for(int y=0; y<height; y+=4)
- for(int p=0; p<5; p++) {
- for(int xc=x; xc<x+4; xc++) {
- PhysicalNet vwire = new PhysicalNet("("+xc+","+y+"-"+(y+3)+")");
- for(int yc=y; yc<y+4; yc++)
- sectorWires[xc][yc][p][0] = vwire;
- }
- for(int yc=y; yc<y+4; yc++) {
- PhysicalNet hwire = new PhysicalNet("("+x+"-"+(x+3)+","+yc+")");
- for(int xc=x; xc<x+4; xc++)
- sectorWires[xc][yc][p][1] = hwire;
- }
- }
-
- for(int x=4; x<width; x+=4) {
- for(int y=0; y<height; y++) {
- for(int p=0; p<5; p++) {
- final int xc = x;
- final int yc = y;
- final int pc = p;
- new PhysicalPip("xxx",
- sectorWires[x-1][y][p][1],
- new PhysicalNet[] { sectorWires[x][y][p][1] },
- 5) {
- public void set(boolean connected) {
- fpslic.cell(xc-1, yc).hwire(pc).drives(fpslic.cell(xc, yc).hwire(pc), connected);
- }
- };
- new PhysicalPip("xxx",
- sectorWires[x][y][p][1],
- new PhysicalNet[] { sectorWires[x-1][y][p][1] },
- 5) {
- public void set(boolean connected) {
- fpslic.cell(xc, yc).hwire(pc).drives(fpslic.cell(xc-1, yc).hwire(pc), connected);
- }
- };
- }
- }
- }
-
- for(int x=0; x<width; x++) {
- for(int y=4; y<height; y+=4) {
- for(int p=0; p<5; p++) {
- final int xc = x;
- final int yc = y;
- final int pc = p;
- new PhysicalPip("xxx",
- sectorWires[x][y-1][p][0],
- new PhysicalNet[] { sectorWires[x][y][p][0] },
- 5) {
- public void set(boolean connected) {
- fpslic.cell(xc, yc-1).vwire(pc).drives(fpslic.cell(xc, yc).vwire(pc), connected);
- }
- };
- new PhysicalPip("xxx",
- sectorWires[x][y][p][0],
- new PhysicalNet[] { sectorWires[x][y-1][p][0] },
- 5) {
- public void set(boolean connected) {
- fpslic.cell(xc, yc).vwire(pc).drives(fpslic.cell(xc, yc-1).vwire(pc), connected);
- }
- };
- }
- }
- }
-
- cells = new PhysicalCell[width][height];
- for(int x=0; x<width; x++)
- for(int y=0; y<height; y++) {
- cells[x][y] = new PhysicalCell(x, y);
- }
- for(int x=0; x<width; x++)
- for(int y=0; y<height; y++)
- cells[x][y].link();
- }
-
- private PhysicalNet getSectorWire(int col, int row, int plane, boolean horizontal) {
- return sectorWires[col][row][plane][horizontal ? 1 : 0];
- }
-
- public class PhysicalCell {
-
- public PhysicalNet getNet(String name) {
- if (name.equals("out")) return outputNet;
- if (name.equals("xi")) return xin;
- if (name.equals("yi")) return yin;
- throw new RuntimeException("unknown");
- }
-
- private int col;
- private int row;
- private PhysicalNet outputNet;
- private PhysicalNet xin;
- private PhysicalNet yin;
- private PhysicalNet[] local = new PhysicalNet[5];
-
- private Fpslic.Cell cell() { return fpslic.cell(col, row); }
-
- public void setFunction(String type) {
- Fpslic.Cell cell = cell();
- cell.c(XLUT);
- cell.xo(false);
- cell.b(false);
- cell.f(false);
- if (type.equals("and2")) cell.xlut(LUT_SELF & LUT_OTHER);
- else if (type.equals("or2")) cell.xlut(LUT_SELF | LUT_OTHER);
- else if (type.equals("xor2")) cell.xlut(LUT_SELF ^ LUT_OTHER);
- else if (type.equals("buf")) cell.xlut(LUT_SELF);
- else if (type.equals("inv")) cell.xlut(~LUT_SELF);
- }
-
- public void link() {
- // FIXME wow, this is a horrendous hack!
- if (getCell(col-1, row+1) != null)
- new PhysicalPip(this+".xiNW", getCell(col-1, row+1).getNet("out"), new PhysicalNet[] { xin }, 5) {
- public void set(boolean connected) { cell().xi(connected ? NW : NONE); }
- };
- if (getCell(col-1, row-1) != null)
- new PhysicalPip(this+".xiSW", getCell(col-1, row-1).getNet("out"), new PhysicalNet[] { xin }, 5) {
- public void set(boolean connected) { cell().xi(connected ? SW : NONE); }
- };
- if (getCell(col+1, row+1) != null)
- new PhysicalPip(this+".xiNE", getCell(col+1, row+1).getNet("out"), new PhysicalNet[] { xin }, 5) {
- public void set(boolean connected) { cell().xi(connected ? NE : NONE); }
- };
- if (getCell(col+1, row-1) != null)
- new PhysicalPip(this+".xiSE", getCell(col+1, row-1).getNet("out"), new PhysicalNet[] { xin }, 5) {
- public void set(boolean connected) { cell().xi(connected ? SE : NONE); }
- };
- }
-
- private PhysicalCell(int col, int row) {
- this.row = row;
- this.col = col;
- outputNet = new PhysicalNet(this.toString()+".out");
- xin = new PhysicalNet(this.toString()+".xi");
- yin = new PhysicalNet(this.toString()+".yi");
- for(int j=0; j<5; j++) {
-
- // plane 3 is reserved for debugging
- if (j==3) continue;
-
- final int i = j;
- local[i] = new PhysicalNet(this.toString()+".L"+i);
- new PhysicalPip(this+".h"+i, null, new PhysicalNet[] { local[i], getSectorWire(col, row, i, true) }) {
- public void set(boolean connected) { cell().h(i, connected); }
- };
- new PhysicalPip(this+".v"+i, null, new PhysicalNet[] { local[i], getSectorWire(col, row, i, false) }) {
- public void set(boolean connected) { cell().v(i, connected); }
- };
- new PhysicalPip(this+".xi"+i, local[i], new PhysicalNet[] { xin }) {
- public void set(boolean connected) { cell().xi(connected ? i : NONE); }
- };
- new PhysicalPip(this+".yi"+i, local[i], new PhysicalNet[] { yin }) {
- public void set(boolean connected) { cell().yi(connected ? i : NONE); }
- };
- new PhysicalPip(this+".o"+i, outputNet, new PhysicalNet[] { local[i] }) {
- public void set(boolean connected) { cell().out(i, connected); }
- };
- }
- }
- public String toString() { return "cell@("+col+","+row+")"; }
-
- }
-
- public void route(PhysicalNet source, PhysicalNet[] dests, FlatNetlist.Net owner) {
- HashSet<PhysicalNet> remainingDests = new HashSet<PhysicalNet>();
- for(PhysicalNet dest : dests) remainingDests.add(dest);
-
- HashSet<PhysicalNet> needsReset = new HashSet<PhysicalNet>();
- PriorityQueue<PhysicalNet> pq = new PriorityQueue<PhysicalNet>();
- needsReset.add(source);
- source.distance = 0;
- pq.add(source);
-
- OUTER: while(true) {
- PhysicalNet pn = pq.poll();
- if (pn==null) throw new Error("unroutable! " + source + " -> " + dests[0]);
- double frontier = pn.distance;
- for(PhysicalPip pip : pn)
- for(PhysicalNet net : pip.getDrivenNets()) {
- double newfrontier = frontier + 0.05 + net.congestion;
-
- // penalty for using any net already routed in this iteration (makes routing order-sensitive)
- if (net.load >= 1) newfrontier = newfrontier + 20;
-
- if (net.distance <= newfrontier) continue;
- pq.remove(net); // if already in there
- net.distance = newfrontier;
- pq.add(net);
- needsReset.add(net);
- net.backpointer = pn;
- if (remainingDests.contains(net)) {
- remainingDests.remove(net);
- if (remainingDests.size()==0) break OUTER;
-
- // Vaughn Betz style multiterminal routing: once we reach one sink, make every node on the path
- // "distance zero" from the source.
- for(PhysicalNet pnx = net; pnx != null; pnx = pnx.backpointer) {
- //pnx.distance = 0;
- pq.add(pnx);
- }
- break;
- }
- }
- }
-
- for(PhysicalNet dest : dests) {
- PhysicalNet pn = dest;
- while(pn != null && pn.backpointer != null) {
- pn.owners.add(owner);
- owner.pns.add(pn);
- if (pn.distance != Double.MAX_VALUE) {
- pn.distance = Double.MAX_VALUE;
- pn.load++;
- if (pn.load>=2) pn.congestion += betaParameter;
- }
- PhysicalPip pip = pn.getPipFrom(pn.backpointer);
- pip.set(true);
- owner.pips.add(pip);
- pn = pn.backpointer;
- }
- // FIXME: check pn==source at this point
- }
-
- for(PhysicalNet pn : needsReset) {
- pn.distance = Double.MAX_VALUE;
- pn.backpointer = null;
- }
- }
- public HashSet<PhysicalNet> allPhysicalNets = new HashSet<PhysicalNet>();
- public class PhysicalNet implements Iterable<PhysicalPip>, Comparable<PhysicalNet> {
- public double congestion = 0;
- public int load = 0;
- public double distance = Double.MAX_VALUE;
- public PhysicalNet backpointer = null;
-
- public int compareTo(PhysicalNet pn) {
- double x = distance - pn.distance;
- return distance > pn.distance
- ? 1
- : distance < pn.distance
- ? -1
- : 0;
- }
-
- private final HashSet<PhysicalPip> pips = new HashSet<PhysicalPip>();
- public Iterator<PhysicalPip> iterator() { return pips.iterator(); }
- private String name;
- public PhysicalNet(String name) {
- this.name = name;
- allPhysicalNets.add(this);
- }
- public String toString() { return name; }
- private void addPip(PhysicalPip pip) { pips.add(pip); }
- public PhysicalPip getPipFrom(PhysicalNet pn) {
- for(PhysicalPip pip : pn)
- for(PhysicalNet pn2 : pip.getDrivenNets())
- if (pn2==this)
- return pip;
- return null;
- }
- public HashSet<FlatNetlist.Net> owners = new HashSet<FlatNetlist.Net>();
- }
-
- public abstract class PhysicalPip {
- private PhysicalNet driver;
- private PhysicalNet[] driven;
- private String name;
- private int defaultCost;
- public String toString() { return name; }
- public PhysicalNet getDriverNet() { return driver; }
- public PhysicalNet[] getDrivenNets() { return driven; }
- public int getCost(PhysicalNet in, PhysicalNet out) { return defaultCost; }
- public PhysicalPip(String name, PhysicalNet driver, PhysicalNet[] driven) { this(name, driver, driven, 100); }
- public PhysicalPip(String name, PhysicalNet driver, PhysicalNet[] driven, int defaultCost) {
- this.name = name;
- this.driver = driver;
- this.driven = driven;
- this.defaultCost = defaultCost;
- if (driver != null) driver.addPip(this);
- for(PhysicalNet pn : driven) pn.addPip(this);
- }
- public abstract void set(boolean connected);
- }
-
- }
-
- private static int ret;
- public static synchronized int scan(final Fpslic device, final Fpslic.Cell cell) {
- try {
- scan(device, cell, YLUT, true);
- ((FtdiBoard)device).readBus(new FtdiBoard.ByteCallback() {
- public void call(byte b) throws Exception {
- ret = b;
- synchronized(device) {
- device.notifyAll();
- }
- }
- });
- synchronized(device) {
- try {
- device.wait();
- } catch (Exception e) { throw new RuntimeException(e); }
- }
- scan(device, cell, YLUT, false);
- return ret;
- } catch (Exception e) { throw new RuntimeException(e); }
- }
-
- public static void scan(Fpslic dev, Fpslic.Cell cell, int source, boolean setup) {
- if (setup) {
- //if (source != NONE) cell.c(source);
- if (cell.b()) cell.b(false);
- if (cell.f()) cell.f(false);
- }
- if (cell.out(L3)!=setup) cell.out(L3, setup);
- if (cell.vx(L3)!=setup) cell.v(L3, setup);
-
- Fpslic.SectorWire sw = cell.vwire(L3);
- //System.out.println("wire is: " + sw);
-
- if (sw.row > (12 & ~0x3) && sw.north()!=null && sw.north().drives(sw))
- sw.north().drives(sw, false);
- while(sw.row > (12 & ~0x3) && sw.south() != null) {
- //System.out.println(sw + " -> " + sw.south());
- if (sw.drives(sw.south())!=setup) sw.drives(sw.south(), setup);
- sw = sw.south();
- }
- if (sw.row < (12 & ~0x3) && sw.south() != null && sw.south().drives(sw))
- sw.north().drives(sw, false);
- while(sw.row < (12 & ~0x3) && sw.north() != null) {
- //System.out.println(sw + " -> " + sw.north());
- if (sw.drives(sw.north())!=setup) sw.drives(sw.north(), setup);
- sw = sw.north();
- }
-
- //cell = dev.cell(19, 15);
- cell = dev.cell(cell.col, 15);
- /*
- System.out.println("cell is " + cell);
- cell.xlut(0xff);
- cell.ylut(0xff);
- cell.b(false);
- cell.f(false);
- cell.c(XLUT);
- cell.out(L3, true);
- cell.oe(NONE);
- */
- if (cell.hx(L3) != setup) cell.h(L3, setup);
- if (cell.vx(L3) != setup) cell.v(L3, setup);
- sw = cell.hwire(L3);
-
- if (sw.west()!=null && sw.west().drives(sw)) { sw.west().drives(sw, false); }
- while(sw.east() != null) {
- //System.out.println(sw + " -> " + sw.east());
- if (sw.drives(sw.east())!=setup) sw.drives(sw.east(), setup);
- sw = sw.east();
- }
-
- }
-
- public static void setInput(FlatNetlist fnl, Fpslic fpslic, String prefix, int val) {
- for(int i=0; ; i++) {
- FlatNetlist.Node n = fnl.top.get(prefix + "["+i+"]");
- if (n==null && i==0) n = fnl.top.get(prefix);
- if (n==null) return;
- Fpslic.Cell c = n.getPlacement(fpslic);
- c.c(XLUT);
- c.b(false);
- c.xlut((val & 0x1)==0 ? 0x00 : 0xff);
- val = val >> 1;
- }
- }
- public static int getOutput(FlatNetlist fnl, Fpslic fpslic, String prefix) {
- int val = 0;
- for(int i=0; ; i++) {
- FlatNetlist.Node n = fnl.top.get(prefix+"["+i+"]");
- if (n==null && i==0) n = fnl.top.get(prefix);
- if (n==null) return val;
- Fpslic.Cell c = n.getPlacement(fpslic);
- c.xlut(LUT_SELF);
- c.c(XLUT);
- c.b(false);
- fpslic.flush();
- int scan = scan(fpslic, c);
- val |= ((scan==0 ? 0 : 1) << i);
- }
- }
-
-
-}
\ No newline at end of file
projects / slipway.git / blobdiff