src/edu/berkeley/fleet/fpga/verilog/Verilog.java

   1 package edu.berkeley.fleet.fpga.verilog;
   2 import edu.berkeley.fleet.api.*;
   3 import edu.berkeley.fleet.two.*;
   4 import edu.berkeley.fleet.*;
   5 import java.lang.reflect.*;
   6 import edu.berkeley.sbp.chr.*;
   7 import edu.berkeley.sbp.misc.*;
   8 import edu.berkeley.sbp.meta.*;
   9 import edu.berkeley.sbp.util.*;
  10 import java.util.*;
  11 import java.io.*;
  12 import static edu.berkeley.fleet.two.FleetTwoFleet.*;
  13
  14 public class Verilog {
  15
  16     public static class SimpleValue implements Value {
  17         public final String s;
  18         public SimpleValue(String s) { this.s = s; }
  19         public SimpleValue(String s, int high, int low) { this.s = s+"["+high+":"+low+"]"; }
  20         public Value getBits(int high, int low) { return new SimpleValue(s, high, low); }
  21         public Assignable getAssignableBits(int high, int low) { return new SimpleValue(s, high, low); }
  22         public String getVerilogName() { return s; }
  23         public String toString() { return s; }
  24     }
  25
  26     public static class CatValue implements Value {
  27         private final Value[] values;
  28         public CatValue(Value[] values) { this.values = values; }
  29         public Value getBits(int high, int low) {
  30             throw new RuntimeException();
  31         }
  32         public Assignable getAssignableBits(int high, int low) {
  33             throw new RuntimeException();
  34         }
  35         public String toString() { return getVerilogName(); }
  36         public String getVerilogName() {
  37             StringBuffer sb = new StringBuffer();
  38             sb.append("{ ");
  39             boolean first = true;
  40             for(int i=0; i<values.length; i++) {
  41                 if (values[i]==null) continue;
  42                 if (!first) sb.append(", ");
  43                 sb.append(values[i].getVerilogName());
  44                 first = false;
  45             }
  46             sb.append(" }");
  47             return sb.toString();
  48         }
  49     }
  50
  51     public static interface Action {
  52         public String getVerilogAction();
  53     }
  54
  55     public static interface Trigger {
  56         public String getVerilogTrigger();
  57     }
  58
  59     public static interface Assignable {
  60         public String getVerilogName();
  61         public Assignable getAssignableBits(int high, int low);
  62     }
  63
  64     public static interface Value extends Assignable {
  65         public String getVerilogName();
  66         public Value getBits(int high, int low);
  67     }
  68
  69     public static class ConditionalAction implements Action {
  70         public String condition;
  71         public Action action;
  72         public ConditionalAction(String condition, Action action) {
  73             this.condition = condition;
  74             this.action = action;
  75         }
  76         public String toString() { return getVerilogAction(); }
  77         public String getVerilogAction() { return "if ("+condition+") begin "+action.getVerilogAction()+" end"; }
  78     }
  79
  80     public static class ConditionalTrigger implements Trigger {
  81         public String condition;
  82         public Trigger trigger;
  83         public ConditionalTrigger(String condition, Trigger trigger) {
  84             this.condition = condition;
  85             this.trigger = trigger;
  86             if (trigger instanceof Module.Port)
  87                 ((Module.Port)trigger).hasLatch = true;
  88         }
  89         public String getVerilogTrigger() {
  90             return "&& (("+condition+") ? (1 " + trigger.getVerilogTrigger() + ") : 1)";
  91         }
  92     }
  93
  94     public static class SimpleAssignable implements Assignable {
  95         public final String s;
  96         public SimpleAssignable(String s) { this.s = s; }
  97         public String getVerilogName() { return s; }
  98         public Assignable getAssignableBits(int high, int low) { return new SimpleValue(s, high, low); }
  99     }
 100
 101     public static class AssignAction implements Action {
 102         public String left;
 103         public String right;
 104         public AssignAction(Assignable left, Value right) {
 105             this.left = left.getVerilogName();
 106             this.right = right.getVerilogName().toString();
 107         }
 108         public AssignAction(Assignable left, String right) {
 109             this.left = left.getVerilogName();
 110             this.right = right;
 111         }
 112         public String getVerilogAction() { return left + "<=" + right + ";"; }
 113         public String toString() { return getVerilogAction(); }
 114     }
 115
 116     public static class SimpleAction implements Action {
 117         public final String verilog;
 118         public SimpleAction(String verilog) { this.verilog = verilog; }
 119         public String getVerilogAction() { return verilog; }
 120         public String toString() { return verilog; }
 121     }
 122
 123     public static class Module {
 124         public void dump(String prefix) throws IOException {
 125             PrintWriter pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(prefix+"/bitfields.v")));
 126             pw.println("`define DATAWIDTH                "+WIDTH_WORD);
 127             pw.println("`define CODEBAG_SIZE_BITS        "+CBD_SIZE.valmaskwidth);
 128             pw.println("`define INSTRUCTION_WIDTH        "+WIDTH_WORD);
 129             pw.println("`define packet_token(p)          "+PACKET_TOKEN.verilogVal("p"));
 130             pw.println("`define packet_data(p)           "+PACKET_DATA.verilogVal("p"));
 131             pw.println("`define packet_dest(p)           "+PACKET_DEST.verilogVal("p"));
 132             pw.println("`define instruction_dest(p)      "+DISPATCH_PATH.verilogVal("p"));
 133             pw.flush();
 134             pw.close();
 135             pw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(prefix+"/"+name+".v")));
 136             dump(pw, true);
 137             pw.flush();
 138             for(InstantiatedModule m : instantiatedModules)
 139                 m.module.dump(prefix);
 140         }
 141         public int id = 0;
 142         public final String name;
 143         public String getName() { return name; }
 144         public Port getPort(String name) { return ports.get(name); }
 145
 146         public HashSet<InstantiatedModule> instantiatedModules = new HashSet<InstantiatedModule>();
 147         public final ArrayList<Event> events = new ArrayList<Event>();
 148
 149         // FIXME: always-alphabetical convention?
 150         public final HashMap<String,Port> ports = new HashMap<String,Port>();
 151         public final ArrayList<String> portorder = new ArrayList<String>();
 152         public final HashMap<String,StateWire> statewires = new HashMap<String,StateWire>();
 153         public final HashMap<String,Latch> latches = new HashMap<String,Latch>();
 154
 155         public StringBuffer crap = new StringBuffer();
 156         public StringBuffer precrap = new StringBuffer();
 157         //public void addCrap(String s) { crap.append(s); crap.append('\n'); }
 158         public void addPreCrap(String s) { precrap.append(s); precrap.append('\n'); }
 159         public void addPreCrap0(String s) { precrap.append(s); }
 160
 161         public Module(String name) {
 162             this.name = name;
 163         }
 164
 165         public SourcePort createInputPort(String name, int width) {
 166             if (ports.get(name)!=null) throw new RuntimeException();
 167             return new SourcePort(name, width, true);
 168         }
 169         public SourcePort getInputPort(String name) {
 170             SourcePort ret = (SourcePort)ports.get(name);
 171             if (ret==null) throw new RuntimeException();
 172             return ret;
 173         }
 174         public SinkPort createOutputPort(String name, int width, String resetBehavior) {
 175             if (ports.get(name)!=null) throw new RuntimeException();
 176             return new SinkPort(name, width, true, resetBehavior);
 177         }
 178         public SinkPort createWirePort(String name, int width) {
 179             if (ports.get(name)!=null) throw new RuntimeException();
 180             return new SinkPort(name, width, false, "");
 181         }
 182         public SourcePort createWireSourcePort(String name, int width) {
 183             if (ports.get(name)!=null) throw new RuntimeException();
 184             return new SourcePort(name, width, false);
 185         }
 186         public SinkPort getOutputPort(String name) {
 187             SinkPort ret = (SinkPort)ports.get(name);
 188             if (ret==null) throw new RuntimeException();
 189             return ret;
 190         }
 191
 192         public class StateWire {
 193             public final String name;
 194             public final boolean initiallyFull;
 195             public String getName() { return name; }
 196             public Action isFull()  { return new SimpleAction(name+"==1"); }
 197             public Action isEmpty() { return new SimpleAction(name+"==0"); }
 198             public Action doFill()  { return new SimpleAction(name+"<=1;"); }
 199             public Action doDrain() { return new SimpleAction(name+"<=0;"); }
 200             public String doReset() { return name+"<="+(initiallyFull?"1":"0")+";"; }
 201             public StateWire(String name) { this(name, false); }
 202             public StateWire(String name, boolean initiallyFull) {
 203                 this.name = name;
 204                 this.initiallyFull = initiallyFull;
 205                 statewires.put(name, this);
 206             }
 207             public void dump(PrintWriter pw) {
 208                 pw.println("  reg "+name+";");
 209                 pw.println("  initial "+name+"="+(initiallyFull?"1":"0")+";");
 210             }
 211         }
 212
 213         public class Latch implements Assignable, Value {
 214             public final String name;
 215             public final int width;
 216             public final long initial;
 217             public Latch(String name, int width) { this(name, width, 0); }
 218             public Latch(String name, int width, long initial) {
 219                 this.width = width;
 220                 this.name = name;
 221                 this.initial = initial;
 222                 latches.put(name, this);
 223             }
 224             public String getVerilogName() { return name; }
 225             public Value getBits(int high, int low) { return new SimpleValue(getVerilogName(), high, low); }
 226             public Assignable getAssignableBits(int high, int low) { return new SimpleValue(getVerilogName(), high, low); }
 227             public String doReset() { return name+"<="+initial+";"; }
 228             public void dump(PrintWriter pw) {
 229                 pw.println("  reg ["+(width-1)+":0] "+name+";");
 230                 pw.println("  initial "+name+"="+initial+";");
 231             }
 232             public void connect(SinkPort driven) {
 233                 driven.latchDriver = this;
 234             }
 235         }
 236
 237         public abstract class Port implements Action, Assignable, Trigger {
 238             public abstract String doReset();
 239             public final String name;
 240             public String getName() { return name; }
 241             public final int width;
 242             public int getWidth() { return width; }
 243             public boolean hasLatch = false;
 244             public boolean external;
 245             public Port(String name, int width, boolean external) {
 246                 this.width = width;
 247                 this.name = name;
 248                 this.external = external;
 249                 ports.put(name, this);
 250                 if (external)
 251                     portorder.add(name);
 252             }
 253             public String getVerilogName() { return name; }
 254             public String getAck() { return name+"_a"; }
 255             public String getReq() { return name+"_r"; }
 256             public abstract String getInterface();
 257             public abstract String getSimpleInterface();
 258             public abstract String getDeclaration();
 259             public abstract String getAssignments();
 260             public abstract void   connect(SinkPort driven);
 261         }
 262
 263         public static class InstantiatedModule {
 264             public final Module module;
 265             public final Module thisModule;
 266             public final int id;
 267             public final HashMap<String,Port> ports = new HashMap<String,Port>();
 268             public String getName() { return module.getName()+"_"+id; }
 269             public InstantiatedModule(Module thisModule, Module module) {
 270                 this.thisModule = thisModule;
 271                 this.module = module;
 272                 this.id = thisModule.id++;
 273                 thisModule.instantiatedModules.add(this);
 274             }
 275             public void dump(PrintWriter pw) {
 276                 pw.println("  " + module.getName() + " " + getName() + "(clk, rst ");
 277                 for(String s : module.portorder)
 278                     pw.println(", " + getPort(s).getSimpleInterface());
 279                 if (module.name.equals("dram")) {
 280                     pw.println("    , dram_addr");
 281                     pw.println("    , dram_addr_r");
 282                     pw.println("    , dram_addr_a");
 283                     pw.println("    , dram_isread");
 284                     pw.println("    , dram_write_data");
 285                     pw.println("    , dram_write_data_push");
 286                     pw.println("    , dram_write_data_full");
 287                     pw.println("    , dram_read_data");
 288                     pw.println("    , dram_read_data_pop");
 289                     pw.println("    , dram_read_data_empty");
 290                     pw.println("    , dram_read_data_latency");
 291                 }
 292                 if (module.name.equals("ddr2")) {
 293                     pw.println("    , ddr2_addr");
 294                     pw.println("    , ddr2_addr_r");
 295                     pw.println("    , ddr2_addr_a");
 296                     pw.println("    , ddr2_isread");
 297                     pw.println("    , ddr2_write_data");
 298                     pw.println("    , ddr2_write_data_push");
 299                     pw.println("    , ddr2_write_data_full");
 300                     pw.println("    , ddr2_read_data");
 301                     pw.println("    , ddr2_read_data_pop");
 302                     pw.println("    , ddr2_read_data_empty");
 303                     pw.println("    , ddr2_read_data_latency");
 304                 }
 305                 if (module.name.equals("video")) {
 306                     pw.println("    , vga_clk");
 307                     pw.println("    , vga_psave");
 308                     pw.println("    , vga_hsync");
 309                     pw.println("    , vga_vsync");
 310                     pw.println("    , vga_sync");
 311                     pw.println("    , vga_blank");
 312                     pw.println("    , vga_r");
 313                     pw.println("    , vga_g");
 314                     pw.println("    , vga_b");
 315                     pw.println("    , vga_clkout");
 316                 }
 317                 pw.println("   );");
 318             }
 319             public Port getPort(String name) {
 320                 return (module.ports.get(name) instanceof SinkPort) ? getOutputPort(name) : getInputPort(name);
 321             }
 322             public SinkPort getInputPort(String name) {
 323                 int width = module.getPort(name).getWidth();
 324                 SinkPort port = (SinkPort)ports.get(name);
 325                 if (port == null) {
 326                     port = thisModule.new SinkPort(getName()+"_"+name, width, false, "");
 327                     ports.put(name, port);
 328                 }
 329                 return port;
 330             }
 331             public SourcePort getOutputPort(String name) {
 332                 int width = module.getPort(name).getWidth();
 333                 SourcePort port = (SourcePort)ports.get(name);
 334                 if (port == null) {
 335                     port = thisModule.new SourcePort(getName()+"_"+name, width, false);
 336                     ports.put(name, port);
 337                 }
 338                 return port;
 339             }
 340         }
 341
 342         public class SourcePort extends Port implements Value {
 343             public SourcePort(String name, int width, boolean external) {
 344                 super(name, width, external); }
 345             public Value getBits(int high, int low) { return new SimpleValue(getVerilogName(), high, low); }
 346             public Assignable getAssignableBits(int high, int low) { return new SimpleValue(getVerilogName(), high, low); }
 347             public String getVerilogTrigger() { return " && " + getReq() + " && !"+getAck(); }
 348             public String getVerilogAction() { return getAck() + " <= 1;"; }
 349             public String getInterface() { return getReq()+", "+getAck()+"_, "+name+""; }
 350             public String getSimpleInterface() { return getReq()+", "+getAck()+", "+name+""; }
 351             public String testBit(int index, boolean value) {
 352                 return "("+name+"["+index+"]=="+(value?1:0)+")";
 353             }
 354             public String getDeclaration() {
 355                 StringBuffer sb = new StringBuffer();
 356                 if (external) {
 357                     sb.append("input "  +                 name +"_r;\n");
 358                     sb.append("output " +                 name +"_a_;\n");
 359                     if (width>0)
 360                         sb.append("input ["+(width-1)+":0]" + name +";\n");
 361                     else
 362                         sb.append("input [0:0]" + name +";\n"); // waste a bit, I guess
 363                 } else {
 364                     sb.append("wire "  +                 name +"_r;\n");
 365                     if (width>0)
 366                         sb.append("wire ["+(width-1)+":0]" + name +";\n");
 367                 }
 368                 if (!hasLatch) {
 369                     sb.append("wire "    +                 name +"_a;\n");
 370                 } else {
 371                     sb.append("reg "    +                 name +"_a;\n");
 372                     sb.append("initial " +                name +"_a = 0;\n");
 373                 }
 374                 return sb.toString();
 375             }
 376             public String doReset() { return hasLatch ? name+"_a<=1;" : ""; }
 377             public String getAssignments() {
 378                 StringBuffer sb = new StringBuffer();
 379                 if (external)
 380                     sb.append("assign " +                 name +"_a_ = " + name + "_a;\n");
 381                 return sb.toString();
 382             }
 383             public void connect(SinkPort driven) {
 384                 driven.driver = this;
 385             }
 386         }
 387         public class SinkPort extends Port {
 388             public SourcePort driver = null;
 389             public boolean forceNoLatch = false;
 390             public SinkPort driven = null;
 391             public Latch latchDriver = null;
 392             public final String resetBehavior;
 393             public Assignable getAssignableBits(int high, int low) { return new SimpleValue(getVerilogName(), high, low); }
 394             public String getVerilogAction() { return getReq() + " <= 1;"; }
 395             public String getVerilogTrigger() { return " && !" + getReq() + " && !"+getAck(); }
 396             public SinkPort(String name, int width, boolean external, String resetBehavior) {
 397                 super(name, width, external); this.resetBehavior=resetBehavior; }
 398             public String getResetBehavior() { return resetBehavior; }
 399             public String getInterface() { return name+"_r_, "+name+"_a, "+name+"_"; }
 400             public String getSimpleInterface() { return name+"_r, "+name+"_a, "+name; }
 401             public String getDeclaration() {
 402                 StringBuffer sb = new StringBuffer();
 403                 if (external) {
 404                     sb.append("output "  +                 name +"_r_;\n");
 405                     sb.append("input "   +                 name +"_a;\n");
 406                     if (width>0)
 407                         sb.append("output ["+(width-1)+":0]" + name +"_;\n");
 408                     else
 409                         sb.append("output [0:0]" + name +"_;\n"); // waste a bit, I guess
 410                 } else {
 411                     sb.append("wire "   +                 name +"_a;\n");
 412                 }
 413
 414                 if (forceNoLatch ||  latchDriver!=null) {
 415                     sb.append("reg "    +                  name +"_r;\n");
 416                     sb.append("initial " +                 name +"_r = 0;\n");
 417                     if (width>0)
 418                         sb.append("wire   ["+(width-1)+":0]" + name +";\n");
 419                 } else if (!hasLatch) {
 420                     sb.append("wire "    +                 name +"_r;\n");
 421                     if (width>0)
 422                         sb.append("wire   ["+(width-1)+":0]" + name +";\n");
 423                 } else {
 424                     sb.append("reg "    +                  name +"_r;\n");
 425                     sb.append("initial " +                 name +"_r = 0;\n");
 426                     if (width>0) {
 427                         sb.append("reg    ["+(width-1)+":0]" + name +";\n");
 428                         if (!"/*NORESET*/".equals(resetBehavior))
 429                             sb.append("initial " +                 name +" = 0;\n");
 430                     }
 431                 }
 432                 return sb.toString();
 433             }
 434             public String doReset() {
 435                 return (forceNoLatch||latchDriver!=null)
 436                     ? name+"_r<=0;"
 437                     : hasLatch
 438                     ? (name+"_r<=0; "+("/*NORESET*/".equals(resetBehavior) ? "" : (name+"<=0;")))
 439                     : "";
 440             }
 441             public String getAssignments() {
 442                 StringBuffer sb = new StringBuffer();
 443                 if (external) {
 444                     sb.append("assign " +                  name +"_r_ = " + name + "_r;\n");
 445                     if (width>0)
 446                         sb.append("assign " +                  name +"_ = " + name + ";\n");
 447                 }
 448                 if (driven != null) {
 449                     sb.append("assign " + driven.name +"_r = " + name + "_r;\n");
 450                     sb.append("assign " + name +"_a = " + driven.name + "_a;\n");
 451                     if (width>0)
 452                         sb.append("assign " + driven.name +"   = " + name + ";\n");
 453                 }
 454                 if (driver != null) {
 455                     sb.append("assign " + name +"_r = " + driver.name + "_r;\n");
 456                     sb.append("assign " + driver.name +"_a = " + name + "_a;\n");
 457                     if (width>0)
 458                         sb.append("assign " + name +"   = " + driver.name + ";\n");
 459                 }
 460                 if (latchDriver != null) {
 461                     if (width>0)
 462                         sb.append("assign " + name +"   = " + latchDriver.name + ";\n");
 463                 }
 464                 return sb.toString();
 465             }
 466             public void connect(SinkPort driven) {
 467                 this.driven = driven;
 468                 throw new RuntimeException();
 469             }
 470         }
 471
 472         public void dump(PrintWriter pw, boolean fix) {
 473             pw.println("`include \"bitfields.v\"");
 474             pw.println("module "+name+"(clk, rst ");
 475             for(String name : portorder) {
 476                 Port p = ports.get(name);
 477                 pw.println("    , " + p.getInterface());
 478             }
 479             if (this.name.equals("root")) {
 480                 pw.println("    , dram_addr");
 481                 pw.println("    , dram_addr_r");
 482                 pw.println("    , dram_addr_a");
 483                 pw.println("    , dram_isread");
 484                 pw.println("    , dram_write_data");
 485                 pw.println("    , dram_write_data_push");
 486                 pw.println("    , dram_write_data_full");
 487                 pw.println("    , dram_read_data");
 488                 pw.println("    , dram_read_data_pop");
 489                 pw.println("    , dram_read_data_empty");
 490                 pw.println("    , dram_read_data_latency");
 491                 pw.println("    , vga_clk");
 492                 pw.println("    , vga_psave");
 493                 pw.println("    , vga_hsync");
 494                 pw.println("    , vga_vsync");
 495                 pw.println("    , vga_sync");
 496                 pw.println("    , vga_blank");
 497                 pw.println("    , vga_r");
 498                 pw.println("    , vga_g");
 499                 pw.println("    , vga_b");
 500                 pw.println("    , vga_clkout");
 501                 pw.println("    , ddr2_addr");
 502                 pw.println("    , ddr2_addr_r");
 503                 pw.println("    , ddr2_addr_a");
 504                 pw.println("    , ddr2_isread");
 505                 pw.println("    , ddr2_write_data");
 506                 pw.println("    , ddr2_write_data_push");
 507                 pw.println("    , ddr2_write_data_full");
 508                 pw.println("    , ddr2_read_data");
 509                 pw.println("    , ddr2_read_data_pop");
 510                 pw.println("    , ddr2_read_data_empty");
 511                 pw.println("    , ddr2_read_data_latency");
 512             }
 513             pw.println("   );");
 514             pw.println();
 515             pw.println("    input clk;");
 516             pw.println("    input rst;");
 517             if (this.name.equals("root")) {
 518                 pw.println("output  [31:0] dram_addr;");
 519                 pw.println("output         dram_addr_r;");
 520                 pw.println("input          dram_addr_a;");
 521                 pw.println("output         dram_isread;");
 522                 pw.println("output  [63:0] dram_write_data;");
 523                 pw.println("output         dram_write_data_push;");
 524                 pw.println("input          dram_write_data_full;");
 525                 pw.println("input   [63:0] dram_read_data;");
 526                 pw.println("output         dram_read_data_pop;");
 527                 pw.println("input          dram_read_data_empty;");
 528                 pw.println("input   [1:0]  dram_read_data_latency;");
 529                 pw.println("output  [31:0] ddr2_addr;");
 530                 pw.println("output         ddr2_addr_r;");
 531                 pw.println("input          ddr2_addr_a;");
 532                 pw.println("output         ddr2_isread;");
 533                 pw.println("output  [63:0] ddr2_write_data;");
 534                 pw.println("output         ddr2_write_data_push;");
 535                 pw.println("input          ddr2_write_data_full;");
 536                 pw.println("input   [63:0] ddr2_read_data;");
 537                 pw.println("output         ddr2_read_data_pop;");
 538                 pw.println("input          ddr2_read_data_empty;");
 539                 pw.println("input   [1:0]  ddr2_read_data_latency;");
 540                 pw.println("input          vga_clk;");
 541                 pw.println("output         vga_psave;");
 542                 pw.println("output         vga_hsync;");
 543                 pw.println("output         vga_vsync;");
 544                 pw.println("output         vga_sync;");
 545                 pw.println("output         vga_blank;");
 546                 pw.println("output   [7:0] vga_r;");
 547                 pw.println("output   [7:0] vga_g;");
 548                 pw.println("output   [7:0] vga_b;");
 549                 pw.println("output         vga_clkout;");
 550             }
 551             for(String name : ports.keySet()) {
 552                 Port p = ports.get(name);
 553                 pw.println("    " + p.getDeclaration());
 554             }
 555             for(StateWire sw : statewires.values())
 556                 sw.dump(pw);
 557             for(Latch l : latches.values())
 558                 l.dump(pw);
 559             for(String name : ports.keySet()) {
 560                 Port p = ports.get(name);
 561                 pw.println("    " + p.getAssignments());
 562             }
 563             for(InstantiatedModule m : instantiatedModules) {
 564                 m.dump(pw);
 565             }
 566             pw.println(precrap);
 567             pw.println("always @(posedge clk) begin");
 568             pw.println("  if (!rst) begin");
 569             for(Latch l : latches.values())
 570                 pw.println(l.doReset());
 571             for(StateWire sw : statewires.values())
 572                 pw.println(sw.doReset());
 573             for(Port p : ports.values())
 574                 pw.println(p.doReset());
 575             pw.println("  end else begin");
 576             for(Port p : ports.values()) {
 577                 if (p instanceof SourcePort) {
 578                     SourcePort ip = (SourcePort)p;
 579                     if (ip.hasLatch)
 580                         pw.println("if (!"+ip.getReq()+" && "+ip.getAck()+") "+ip.getAck()+"<=0;");
 581                 } else {
 582                     SinkPort op = (SinkPort)p;
 583                     if (op.hasLatch)
 584                         pw.println("if ("+op.getReq()+" && "+op.getAck()+") begin "+
 585                                    op.getReq()+"<=0; "+
 586                                    op.getResetBehavior()+" end");
 587                 }
 588             }
 589             for(Event a : events) a.dump(pw, fix);
 590             pw.println("    begin end");
 591             pw.println("    end");
 592             pw.println("  end");
 593
 594             pw.println(crap);
 595             pw.println("endmodule");
 596         }
 597
 598         public class Event {
 599             public Object[]  triggers;
 600             public Object[]  actions;
 601             public Event(Object[] triggers, Object action) { this(triggers, new Object[] { action }); }
 602             public Event(Object[] triggers, Object[] actions) {
 603                 Module.this.events.add(this);
 604                 this.triggers = triggers;
 605                 this.actions = actions;
 606                 for(int i=0; i<triggers.length; i++)
 607                     if (triggers[i] instanceof Port)
 608                         ((Port)triggers[i]).hasLatch = true;
 609             }
 610             public void dump(PrintWriter pw, boolean fix) {
 611                 pw.print("if (1");
 612                 for(Object o : triggers) {
 613                     if (o instanceof Trigger) pw.print(((Trigger)o).getVerilogTrigger());
 614                     else                      pw.print(" && " + o);
 615                 }
 616                 pw.println(") begin ");
 617                 for(Object a : actions) if (a!=null) pw.println(((Action)a).getVerilogAction());
 618                 if (fix) pw.println("end /*else*/ ");
 619                 else     pw.println("end else ");
 620             }
 621         }
 622     }
 623 }