package era.mi.logic.components;
-import era.mi.logic.Util;
-import era.mi.logic.Bit;
-import era.mi.logic.WireArray;
-import era.mi.logic.WireArrayObserver;
+import java.util.List;
-@Deprecated
-public class Merger implements WireArrayObserver
+import era.mi.logic.types.BitVector;
+import era.mi.logic.wires.Wire;
+import era.mi.logic.wires.Wire.WireEnd;
+import era.mi.logic.wires.WireObserver;
+
+public class Merger implements WireObserver, Component
{
- private WireArray out;
- private WireArray[] inputs;
-
- //TODO: General problem with this concept; New inputs coming in at the same time override each other
-
+ private WireEnd out;
+ private WireEnd[] inputs;
+ private int[] beginningIndex;
+
/**
*
- * @param union The output of merging n {@link WireArray}s into one. Must have length = a1.length() + a2.length() + ... + an.length().
+ * @param union The output of merging n {@link Wire}s into one. Must have length = a1.length() + a2.length() + ... + an.length().
* @param inputs The inputs to be merged into the union
*/
- public Merger(WireArray union, WireArray... inputs)
+ public Merger(WireEnd union, WireEnd... inputs)
{
this.inputs = inputs;
this.out = union;
-
+ this.beginningIndex = new int[inputs.length];
+
int length = 0;
- for(WireArray input : inputs)
+ for (int i = 0; i < inputs.length; i++)
{
- length += input.length();
- input.addObserver(this);
+ beginningIndex[i] = length;
+ length += inputs[i].length();
+ inputs[i].addObserver(this);
}
-
- if(length != union.length())
- throw new IllegalArgumentException("The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
- }
- protected void compute()
- {
- Bit[][] bits = new Bit[inputs.length][];
- for(int i = 0; i < inputs.length; i++)
- bits[i] = inputs[i].getValues();
- Bit[] newOut = Util.concat(bits);
- out.feedSignals(newOut);
+ if (length != union.length())
+ throw new IllegalArgumentException(
+ "The output of merging n WireArrays into one must have length = a1.length() + a2.length() + ... + an.length().");
}
- public WireArray getInput(int index)
+ public WireEnd getInput(int index)
{
return inputs[index];
}
-
- public WireArray getUnion()
+
+ public WireEnd getUnion()
{
return out;
}
-
+
+ @Override
+ public void update(Wire initiator, BitVector oldValues)
+ {
+ int index = find(initiator);
+ int beginning = beginningIndex[index];
+ out.feedSignals(beginning, inputs[index].getValues());
+ }
+
+ private int find(Wire w)
+ {
+ for (int i = 0; i < inputs.length; i++)
+ if (inputs[i].getWire() == w)
+ return i;
+ return -1;
+ }
+
+ public WireEnd[] getInputs()
+ {
+ return inputs.clone();
+ }
+
+ @Override
+ public List<WireEnd> getAllInputs()
+ {
+ return List.of(inputs);
+ }
+
@Override
- public void update(WireArray initiator)
+ public List<WireEnd> getAllOutputs()
{
- compute(); //No inner delay
+ return List.of(out);
}
}