X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=net.mograsim.logic.core%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fcore%2Fcomponents%2FMerger.java;fp=net.mograsim.logic.core%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fcore%2Fcomponents%2FMerger.java;h=c4c7170144f4217f5d805de7e1efbf5a261fb6f2;hb=07faf07e3acb8b2afdc2bf65a46bc868faaed0f8;hp=0000000000000000000000000000000000000000;hpb=0009789a8df6b8d4562b6e1cbfa75102a7516ea8;p=Mograsim.git diff --git a/net.mograsim.logic.core/src/net/mograsim/logic/core/components/Merger.java b/net.mograsim.logic.core/src/net/mograsim/logic/core/components/Merger.java new file mode 100644 index 00000000..c4c71701 --- /dev/null +++ b/net.mograsim.logic.core/src/net/mograsim/logic/core/components/Merger.java @@ -0,0 +1,85 @@ +package net.mograsim.logic.core.components; + +import java.util.List; + +import net.mograsim.logic.core.timeline.Timeline; +import net.mograsim.logic.core.types.BitVector; +import net.mograsim.logic.core.wires.Wire; +import net.mograsim.logic.core.wires.WireObserver; +import net.mograsim.logic.core.wires.Wire.ReadEnd; +import net.mograsim.logic.core.wires.Wire.ReadWriteEnd; + +public class Merger extends Component implements WireObserver +{ + private ReadWriteEnd out; + private ReadEnd[] inputs; + private int[] beginningIndex; + + /** + * + * @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(Timeline timeline, ReadWriteEnd union, ReadEnd... inputs) + { + super(timeline); + this.inputs = inputs; + this.out = union; + this.beginningIndex = new int[inputs.length]; + + int length = 0; + for (int i = 0; i < inputs.length; i++) + { + 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()."); + } + + public ReadEnd getInput(int index) + { + return inputs[index]; + } + + public ReadEnd getUnion() + { + return out; + } + + @Override + public void update(ReadEnd initiator, BitVector oldValues) + { + int index = find(initiator); + int beginning = beginningIndex[index]; + out.feedSignals(beginning, inputs[index].getValues()); + } + + private int find(ReadEnd r) + { + for (int i = 0; i < inputs.length; i++) + if (inputs[i] == r) + return i; + return -1; + } + + public ReadEnd[] getInputs() + { + return inputs.clone(); + } + + @Override + public List getAllInputs() + { + return List.of(inputs); + } + + @Override + public List getAllOutputs() + { + return List.of(out); + } +}