src/edu/berkeley/fleet/dataflow/DiscardNode.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 public class DiscardNode extends Node {
   8
   9     private final Ship    ship  = dfg.pool.allocateShip("Counter");
  10     private final InPort  op    = new DockInPort("op",    ship.getDock("inOp"), "PASS_C2_V1");
  11     public  final InPort  in    = new DockInPort("val",   ship.getDock("in1"));
  12     public  final InPort  count = new DockInPort("count", ship.getDock("in2"));
  13
  14     public  final OutPort out   = new DockOutPort("out", ship.getDock("out")) {
  15             protected void build(CodeBag ctx, LoopFactory lf) {
  16
  17                 lf = lf.makeNext(0);
  18
  19                 lf.abortLoopIfTorpedoPresent();
  20                 lf.collectWord();
  21                 lf.setFlags(FlagFunction.ZERO.add(Predicate.FlagC), FlagFunction.ZERO);
  22
  23                 lf.setPredicate(Predicate.FlagA);
  24                 lf.abortLoopIfTorpedoPresent();
  25                 peer.recvToken(lf);
  26                 peer.sendWord(lf);
  27                 lf.setPredicate(null);
  28
  29             }
  30         };
  31
  32     public DiscardNode(DataFlowGraph dfg) {
  33         super(dfg);
  34     }
  35
  36 }
  37