src/edu/berkeley/fleet/dataflow/PunctuatorNode.java

   1 package edu.berkeley.fleet.dataflow;
   2 import java.util.*;
   3 import edu.berkeley.fleet.loops.*;
   4 import edu.berkeley.fleet.api.*;
   5 import edu.berkeley.fleet.api.Instruction.Set.FlagFunction;
   6
   7 /**
   8  *  Takes an item from "count", passes that many items from "val" to
   9  *  "out", and then supplies one instance of "punc" at "out".
  10  */
  11 public class PunctuatorNode extends Node {
  12     private final long    punc;
  13     public  final InPort  count;
  14     private final Ship    ship  = dfg.pool.allocateShip("Counter");
  15     private final InPort  op    = new DockInPort("inOp", ship.getDock("inOp"), "PASS_C2_V1");
  16     public  final InPort  val   = new DockInPort("val",  ship.getDock("in1"));
  17     public  final OutPort out   = new DockOutPort("out", ship.getDock("out")) {
  18             protected void build(CodeBag ctx, LoopFactory lf) {
  19                 lf = lf.makeNext(0);
  20                 lf.abortLoopIfTorpedoPresent();
  21                 peer.recvToken(lf);
  22                 lf.collectWord();
  23                 peer.sendWord(lf);
  24
  25                 lf.literal(punc);
  26                 lf.setFlags(FlagFunction.ZERO.add(Predicate.FlagC), FlagFunction.ZERO);
  27                 lf.setPredicate(Predicate.FlagA);
  28                 peer.recvToken(lf);
  29                 peer.sendWord(lf);
  30                 lf.setPredicate(null);
  31             }
  32         };
  33
  34     public PunctuatorNode(DataFlowGraph dfg, long punc) {
  35         super(dfg);
  36         this.punc = punc;
  37         this.count = new DockInPort("in2", ship.getDock("in2"));
  38     }
  39 }