import java.util.List;
import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
+import era.mi.logic.wires.WireArray.WireArrayEnd;
/**
- * Models a multiplexer. Takes an arbitrary amount of input {@link WireArray}s, one of which,
- * as determined by select, is put through to the output.
+ * Models a multiplexer. Takes an arbitrary amount of input {@link WireArray}s, one of which, as determined by select, is put through to the
+ * output.
+ *
* @author Fabian Stemmler
*
*/
{
private final WireArray select, in;
private final WireArray[] outputs;
- private final WireArrayInput[] outputsI;
+ private final WireArrayEnd[] outputsI;
private final int outputSize;
private int selected = -1;
-
+
/**
* Input {@link WireArray}s and out must be of uniform length
- * @param out Must be of uniform length with all inputs.
- * @param select Indexes the input array which is to be mapped to the output. Must have enough bits
- * to index all inputs.
+ *
+ * @param out Must be of uniform length with all inputs.
+ * @param select Indexes the input array which is to be mapped to the output. Must have enough bits to index all inputs.
* @param outputs One of these inputs is mapped to the output, depending on the select bits
*/
public Demux(int processTime, WireArray in, WireArray select, WireArray... outputs)
{
super(processTime);
outputSize = in.length;
-
+
this.in = in;
this.outputs = outputs;
- this.outputsI = new WireArrayInput[outputs.length];
- for(int i = 0; i < this.outputsI.length; i++)
+ this.outputsI = new WireArrayEnd[outputs.length];
+ for (int i = 0; i < this.outputsI.length; i++)
{
- if(outputs[i].length != outputSize)
+ if (outputs[i].length != outputSize)
throw new IllegalArgumentException("All DEMUX wire arrays must be of uniform length!");
this.outputsI[i] = outputs[i].createInput();
}
-
+
this.select = select;
select.addObserver(this);
-
+
int maxInputs = 1 << select.length;
- if(this.outputsI.length > maxInputs)
- throw new IllegalArgumentException("There are more outputs ("
- + this.outputsI.length + ") to the DEMUX than supported by "
+ if (this.outputsI.length > maxInputs)
+ throw new IllegalArgumentException("There are more outputs (" + this.outputsI.length + ") to the DEMUX than supported by "
+ select.length + " select bits (" + maxInputs + ").");
in.addObserver(this);
}
@Override
- public void compute() {
+ public void compute()
+ {
int selectValue = select.hasNumericValue() ? (int) select.getUnsignedValue() : -1;
- if(selectValue >= outputsI.length)
+ if (selectValue >= outputsI.length)
selectValue = -1;
-
- if(selected != selectValue && selected != -1)
+
+ if (selected != selectValue && selected != -1)
outputsI[selected].clearSignals();
-
+
selected = selectValue;
-
- if(selectValue != -1)
+
+ if (selectValue != -1)
outputsI[selectValue].feedSignals(in.getValues());
}