+++ /dev/null
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
- <classpathentry kind="src" path="src"/>
- <classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/5"/>
- <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-10">
- <attributes>
- <attribute name="module" value="true"/>
- </attributes>
- </classpathentry>
- <classpathentry kind="output" path="bin"/>
-</classpath>
+++ /dev/null
-<?xml version="1.0" encoding="UTF-8"?>
-<projectDescription>
- <name>era.mi</name>
- <comment></comment>
- <projects>
- </projects>
- <buildSpec>
- <buildCommand>
- <name>org.eclipse.jdt.core.javabuilder</name>
- <arguments>
- </arguments>
- </buildCommand>
- </buildSpec>
- <natures>
- <nature>org.eclipse.jdt.core.javanature</nature>
- </natures>
-</projectDescription>
+++ /dev/null
-eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=10
-org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=10
-org.eclipse.jdt.core.compiler.debug.lineNumber=generate
-org.eclipse.jdt.core.compiler.debug.localVariable=generate
-org.eclipse.jdt.core.compiler.debug.sourceFile=generate
-org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
-org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
-org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=10
+++ /dev/null
-package era.mi.logic;
-
-public enum Bit
-{
- ONE, ZERO, Z, X;
-
- public static Bit and(Bit a, Bit b)
- {
- return a.and(b);
- }
-
- public Bit and(Bit other)
- {
- if (equals(Bit.ZERO) || other.equals(Bit.ZERO))
- return Bit.ZERO;
- else if (equals(other) && equals(Bit.ONE))
- return Bit.ONE;
- else
- return Bit.X;
- }
-
- public static Bit or(Bit a, Bit b)
- {
- return a.or(b);
- }
-
- public Bit or(Bit other)
- {
- if (equals(Bit.ONE) || other.equals(Bit.ONE))
- return Bit.ONE;
- else if (equals(other) && equals(Bit.ZERO))
- return Bit.ZERO;
- else
- return Bit.X;
- }
-
- public static Bit xor(Bit a, Bit b)
- {
- return a.xor(b);
- }
-
- public Bit xor(Bit other)
- {
- // I'm uncertain how this should behave for cases where one value is neither 1 nor 0.
- // TODO: Implement xor
- return Bit.X;
- }
-
- public Bit not()
- {
- switch (this)
- {
- case ONE:
- return Bit.ZERO;
- case ZERO:
- return Bit.ONE;
- default:
- return Bit.X;
- }
- }
-
- /**
- * Rules for two bits that get directly connected<br>
- * <code><table>
- * <tbody>
- * <tr><td><td>X<td>0<td>1<td>Z</tr>
- * <tr><td>X<td>X<td>X<td>X<td>X</tr>
- * <tr><td>0<td>X<td>0<td>X<td>0</tr>
- * <tr><td>1<td>X<td>X<td>1<td>1</tr>
- * <tr><td>Z<td>X<td>0<td>1<td>Z</tr>
- * </tbody>
- * </table><code>
- *
- * @return the result according to the table
- *
- * @author Christian Femers
- */
- public Bit combineWith(Bit other)
- {
- if (this == other)
- return this;
- if (this == X || other == X)
- return X;
- if (other == Z)
- return this;
- if (this == Z)
- return other;
- return X;
- }
-
- public static Bit combine(Bit a, Bit b)
- {
- return a.combineWith(b);
- }
-}
+++ /dev/null
-package era.mi.logic;
-
-import era.mi.logic.timeline.Timeline;
-
-public class Simulation
-{
- public final static Timeline TIMELINE = new Timeline(11);
-
- public static void main(String[] args)
- {
- }
-}
\ No newline at end of file
+++ /dev/null
-package era.mi.logic;
-
-import java.util.Arrays;
-
-public final class Util
-{
-
- @SuppressWarnings("unchecked")
- public static <T> T[] concat(T[]... arrays)
- {
- if(arrays.length == 0)
- throw new IllegalArgumentException("Cannot concatenate 0 arrays.");
-
- int length = 0;
- for(T[] array : arrays)
- length += array.length;
-
- T[] newArray = Arrays.copyOf(arrays[0], length);
- int appendIndex = arrays[0].length;
- for(int i = 1; i < arrays.length; i++)
- {
- System.arraycopy(arrays[i], 0, newArray, appendIndex, arrays[i].length);
- appendIndex += arrays[i].length;
- }
-
- return newArray;
- }
-
-// @SuppressWarnings("unchecked")
-// public static <T> T[][] split(T[] array, int... lengths)
-// {
-// //TODO: implement array split again; This version contains an illegal cast
-// int totalLength = 0;
-// for(int length : lengths)
-// totalLength += length;
-//
-// if(totalLength != array.length)
-// throw new IllegalArgumentException(); //TODO: add proper error message
-//
-// Object[][] newArray = new Object[lengths.length][];
-// int splitIndex = 0;
-// for(int i = 0; i < lengths.length; i++)
-// {
-// System.arraycopy(array, splitIndex, newArray, 0, lengths[i]);
-// splitIndex += lengths[i];
-// }
-//
-// return (T[][]) newArray;
-// }
-
- public static Bit[] and(Bit[] a, Bit[] b)
- {
- return binBitOp(a, b, (bA, bB) -> Bit.and(bA, bB));
- }
-
- public static Bit[] or(Bit[] a, Bit[] b)
- {
- return binBitOp(a, b, (bA, bB) -> Bit.or(bA, bB));
- }
-
- public static Bit[] xor(Bit[] a, Bit[] b)
- {
- return binBitOp(a, b, (bA, bB) -> Bit.xor(bA, bB));
- }
-
- private static Bit[] binBitOp(Bit[] a, Bit[] b, BitOp op)
- {
- if(a.length != b.length)
- throw new IllegalArgumentException("Bit Arrays were not of equal length.");
- Bit[] out = new Bit[a.length];
- for(int i = 0; i < a.length; i++)
- {
- out[i] = op.execute(a[i], b[i]);
- }
- return out;
- }
-
- public static Bit[] not(Bit[] a)
- {
- Bit[] out = new Bit[a.length];
- for(int i = 0; i < a.length; i++)
- {
- out[i] = a[i].not();
- }
- return out;
- }
-
- interface BitOp
- {
- Bit execute(Bit a, Bit b);
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Simulation;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArrayObserver;
-
-public abstract class BasicComponent implements WireArrayObserver
-{
- private int processTime;
-
- /**
- *
- * @param processTime Amount of time this component takes to update its outputs. Must be more than 0, otherwise 1 is assumed.
- *
- * @author Fabian Stemmler
- */
- public BasicComponent(int processTime)
- {
- this.processTime = processTime > 0 ? processTime : 1;
- }
-
- @Override
- public void update(WireArray initiator)
- {
- Simulation.TIMELINE.addEvent((e) -> {compute();}, processTime);
- }
-
- protected abstract void compute();
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import java.util.Arrays;
-
-import era.mi.logic.Bit;
-import era.mi.logic.wires.WireArray;
-
-public class BitDisplay extends BasicComponent
-{
- private final WireArray in;
- private Bit[] displayedValue;
-
- public BitDisplay(WireArray in)
- {
- super(1);
- this.in = in;
- in.addObserver(this);
- }
-
- @Override
- protected void compute()
- {
- displayedValue = in.getValues();
- }
-
- public Bit[] getDisplayedValue()
- {
- return displayedValue;
- }
-
- public boolean isDisplaying(Bit... values)
- {
- return Arrays.equals(displayedValue, values);
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Bit;
-import era.mi.logic.Simulation;
-import era.mi.logic.timeline.TimelineEvent;
-import era.mi.logic.timeline.TimelineEventHandler;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class Clock implements TimelineEventHandler
-{
- private boolean toggle = false;
- private WireArrayInput outI;
-
- public Clock(WireArray out)
- {
- this.outI = out.createInput();
- }
-
- @Override
- public void handle(TimelineEvent e)
- {
- Simulation.TIMELINE.addEvent(this, 50);
- outI.feedSignals(new Bit[] { toggle ? Bit.ONE : Bit.ZERO });
- toggle = !toggle;
- }
-
- public WireArray getOut()
- {
- return outI.owner;
- }
-}
+++ /dev/null
-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;
-
-@Deprecated
-public class Merger implements WireArrayObserver
-{
- private WireArray out;
- private WireArray[] inputs;
-
- //TODO: General problem with this concept; New inputs coming in at the same time override each other
-
- /**
- *
- * @param union The output of merging n {@link WireArray}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)
- {
- this.inputs = inputs;
- this.out = union;
-
- int length = 0;
- for(WireArray input : inputs)
- {
- length += input.length();
- input.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);
- }
-
- public WireArray getInput(int index)
- {
- return inputs[index];
- }
-
- public WireArray getUnion()
- {
- return out;
- }
-
- @Override
- public void update(WireArray initiator)
- {
- compute(); //No inner delay
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.WireArray;
-import era.mi.logic.WireArrayObserver;
-
-public class Merger2 implements WireArrayObserver
-{
- private WireArray out;
- private WireArray[] 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 inputs The inputs to be merged into the union
- */
- public Merger2(WireArray union, WireArray... inputs)
- {
- 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 WireArray getInput(int index)
- {
- return inputs[index];
- }
-
- public WireArray getUnion()
- {
- return out;
- }
-
- @Override
- public void update(WireArray initiator)
- {
- int index = find(initiator);
- int beginning = beginningIndex[index];
- out.feedSignals(beginning, initiator.getValues());
- }
-
- private int find(WireArray w)
- {
- for(int i = 0; i < inputs.length; i++)
- if(inputs[i] == w)
- return i;
- return -1;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-
- public WireArray[] getInputs()
- {
- return inputs.clone();
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Bit;
-import era.mi.logic.wires.WireArray;
-
-/**
- * Models a Multiplexer. A is selected when select bit is 1, B when select bit is 0. Outputs X otherwise.
- * @author Fabian
- *
- */
-public class Mux extends BasicComponent
-{
- private WireArray a, b, out;
- private WireArray select;
- private final int size;
-
- /**
- * {@link WireArray}s a, b and out must be of uniform length, select
- * @param a Must be of uniform length with b and out.
- * @param b Must be of uniform length with a and out.
- * @param select C
- * @param out Must be of uniform length with a and b.
- */
- public Mux(int processTime, WireArray a, WireArray b, WireArray select, WireArray out)
- {
- super(processTime);
- size = a.length;
- if(b.length != out.length || b.length != size)
- throw new IllegalArgumentException("All MUX wire arrays must be of uniform length!");
- this.a = a;
- a.addObserver(this);
- this.b = b;
- b.addObserver(this);
- this.select = select;
- select.addObserver(this);
- this.out = out;
- }
-
- @Override
- protected void compute()
- {
- WireArray active = b;
- switch(select.getValue())
- {
- case ONE:
- active = a;
- case ZERO:
- out.feedSignals(active.getValues());
- break;
- default:
- Bit[] newValues = new Bit[size];
- for(int i = 0; i < size; i++)
- newValues[i] = Bit.X;
- out.feedSignals(newValues);
- }
- }
-
- public WireArray getA()
- {
- return a;
- }
-
- public WireArray getB()
- {
- return b;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-
- public WireArray getSelect()
- {
- return select;
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Simulation;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-import era.mi.logic.wires.WireArrayObserver;
-
-/**
- * Models a Multiplexer. A is selected when select bit is 1, B when select bit is 0. Outputs X otherwise.
- * @author Fabian Stemmler
- *
- */
-public class Mux2 implements WireArrayObserver
-{
- private WireArray select;
- private WireArrayInput outI;
- private WireArrayInput[] inputs;
- private final int size;
- private final int processTime;
- private int selected;
-
- /**
- * {@link WireArray}s a, b and out must be of uniform length, select
- * @param out Must be of uniform length with a and b.
- * @param select Indexes the input array which is to be mapped to the output
- * @param inputs One of these inputs is mapped to the output, depending on the select wires
- */
- public Mux2(int processTime, WireArray out, WireArray select, WireArray... inputs)
- {
- this.processTime = processTime;
- size = out.length;
-
- this.inputs = new WireArrayInput[inputs.length];
- for(int i = 0; i < this.inputs.length; i++)
- {
- if(inputs[i].length != size)
- throw new IllegalArgumentException("All MUX wire arrays must be of uniform length!");
- this.inputs[i] = inputs[i].createInput();
- inputs[i].addObserver(this);
- }
-
- this.select = select;
- select.addObserver(this);
- selected = -1;
-
- int maxInputs = 1 << select.length;
- if(this.inputs.length > maxInputs)
- throw new IllegalArgumentException("There are more inputs ("
- + this.inputs.length + ") to the MUX than supported by "
- + select.length + " select bits (" + maxInputs + ").");
-
- outI = out.createInput();
- out.addObserver(this);
- }
-
- public WireArray getOut()
- {
- return outI.owner;
- }
-
- public WireArray getSelect()
- {
- return select;
- }
-
- @Override
- public void update(WireArray initiator) {
- int selectValue;
- if(!select.hasNumericValue() || (selectValue = (int) select.getUnsignedValue()) > size)
- {
- if(initiator == select)
- {
- Simulation.TIMELINE.addEvent((e) -> {
- if(selected != -1)
- {
- inputs[selected].clearSignals();
- selected = -1;
- outI.clearSignals();
- }
- }, processTime);
- }
- return;
- }
-
- WireArrayInput active = inputs[selectValue];
- Simulation.TIMELINE.addEvent((e) -> {
- if(initiator == select)
- {
- if(selected != -1)
- inputs[selected].clearSignals();
- selected = selectValue;
- active.feedSignals(outI.owner.getValues());
- outI.feedSignals(active.owner.getValues());
- }
- else if(initiator == outI.owner)
- active.feedSignals(outI.owner.getValues());
- else if(initiator == active.owner)
- outI.feedSignals(active.owner.getValues());
- }, processTime);
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Bit;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArrayObserver;
-
-public class Splitter implements WireArrayObserver
-{
- private WireArray input;
- private WireArray[] outputs;
-
- public Splitter(WireArray input, WireArray... outputs)
- {
- this.input = input;
- this.outputs = outputs;
- input.addObserver(this);
- int length = 0;
- for(WireArray out : outputs)
- length += out.length;
-
- if(input.length != length)
- throw new IllegalArgumentException("The input of splitting one into n WireArrays must have length = a1.length() + a2.length() + ... + an.length().");
- }
-
- protected void compute()
- {
- int startIndex = 0;
- Bit[] inputBits = input.getValues();
- for(int i = 0; i < outputs.length; i++)
- {
- Bit[] outputBits = new Bit[outputs[i].length];
- System.arraycopy(inputBits, startIndex, outputBits, 0, outputs[i].length);
- outputs[i].feedSignals(outputBits);
- startIndex += outputs[i].length;
- }
- }
-
- public WireArray getInput()
- {
- return input;
- }
-
- public WireArray[] getOutputs()
- {
- return outputs.clone();
- }
-
- @Override
- public void update(WireArray initiator)
- {
- compute();
- }
-}
+++ /dev/null
-package era.mi.logic.components;
-
-import era.mi.logic.Bit;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class TriState extends BasicComponent{
- WireArray in, enable;
- WireArrayInput outI;
-
- public TriState(int processTime, WireArray in, WireArray out, WireArray enable) {
- super(processTime);
- if(in.length != out.length)
- throw new IllegalArgumentException("Tri-state output must have the same amount of bits as the input. Input: " + in.length + " Output: " + out.length);
- if(enable.length != 1)
- throw new IllegalArgumentException("Tri-state enable must have exactly one bit, not " + enable.length + ".");
- this.in = in;
- in.addObserver(this);
- this.enable = enable;
- enable.addObserver(this);
- outI = out.createInput();
- }
-
- @Override
- protected void compute()
- {
- if(enable.getValue() == Bit.ONE)
- outI.feedSignals(in.getValues());
- else
- outI.clearSignals();
- }
-
-}
+++ /dev/null
-package era.mi.logic.components.gates;
-
-import era.mi.logic.Util;
-import era.mi.logic.components.BasicComponent;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class AndGate extends BasicComponent
-{
- private WireArray a, b, out;
- private WireArrayInput outI;
-
- public AndGate(int processTime, WireArray a, WireArray b, WireArray out)
- {
- super(processTime);
- this.a = a;
- a.addObserver(this);
- this.b = b;
- b.addObserver(this);
- this.out = out;
- outI = out.createInput();
- }
-
- protected void compute()
- {
- outI.feedSignals(Util.and(a.getValues(), b.getValues()));
- }
-
- public WireArray getA()
- {
- return a;
- }
-
- public WireArray getB()
- {
- return b;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-}
+++ /dev/null
-package era.mi.logic.components.gates;
-
-import era.mi.logic.Util;
-import era.mi.logic.components.BasicComponent;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class NotGate extends BasicComponent
-{
- private WireArray in, out;
- private WireArrayInput outI;
-
-
- public NotGate(int processTime, WireArray in, WireArray out)
- {
- super(processTime);
- this.in = in;
- in.addObserver(this);
- this.out = out;
- outI = out.createInput();
- }
-
- public void compute()
- {
- outI.feedSignals(Util.not(in.getValues()));
- }
-
- public WireArray getIn()
- {
- return in;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-}
+++ /dev/null
-package era.mi.logic.components.gates;
-
-import era.mi.logic.Util;
-import era.mi.logic.components.BasicComponent;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class OrGate extends BasicComponent
-{
- private WireArray a, b, out;
- private WireArrayInput outI;
-
- public OrGate(int processTime, WireArray a, WireArray b, WireArray out)
- {
- super(processTime);
- this.a = a;
- a.addObserver(this);
- this.b = b;
- b.addObserver(this);
- this.out = out;
- this.outI = out.createInput();
- }
-
- protected void compute()
- {
- outI.feedSignals(Util.or(a.getValues(), b.getValues()));
- }
-
- public WireArray getA()
- {
- return a;
- }
-
- public WireArray getB()
- {
- return b;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-}
+++ /dev/null
-package era.mi.logic.components.gates;
-
-import era.mi.logic.Util;
-import era.mi.logic.components.BasicComponent;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-public class XorGate extends BasicComponent
-{
- private WireArray a, b, out;
- private WireArrayInput outI;
-
- public XorGate(int processTime, WireArray a, WireArray b, WireArray out)
- {
- super(processTime);
- this.a = a;
- a.addObserver(this);
- this.b = b;
- b.addObserver(this);
- this.out = out;
- }
-
- protected void compute()
- {
- outI.feedSignals(Util.xor(a.getValues(), b.getValues()));
- }
-
- public WireArray getA()
- {
- return a;
- }
-
- public WireArray getB()
- {
- return b;
- }
-
- public WireArray getOut()
- {
- return out;
- }
-}
+++ /dev/null
-package era.mi.logic.tests;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-import java.util.Arrays;
-import java.util.function.LongConsumer;
-
-import org.junit.jupiter.api.Test;
-
-import era.mi.logic.Bit;
-import era.mi.logic.Simulation;
-import era.mi.logic.components.Mux2;
-import era.mi.logic.components.gates.AndGate;
-import era.mi.logic.components.gates.NotGate;
-import era.mi.logic.components.gates.OrGate;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-
-class ComponentTest
-{
-
-// @Test
-// void circuitExampleTest()
-// {
-// Simulation.TIMELINE.reset();
-// WireArray a = new WireArray(1, 1), b = new WireArray(1, 1), c = new WireArray(1, 10), d = new WireArray(2, 1), e = new WireArray(1, 1),
-// f = new WireArray(1, 1), g = new WireArray(1, 1), h = new WireArray(2, 1), i = new WireArray(2, 1), j = new WireArray(1, 1), k = new WireArray(1, 1);
-// new AndGate(1, a, b, f);
-// new NotGate(1, f, g);
-// new Merger2(h, c, g);
-// new Mux(1, h, d, e, i);
-// new Splitter(i, k, j);
-//
-// a.createInput().feedSignals(Bit.ZERO);
-// b.createInput().feedSignals(Bit.ONE);
-// c.createInput().feedSignals(Bit.ZERO);
-// d.createInput().feedSignals(Bit.ONE, Bit.ONE);
-// e.createInput().feedSignals(Bit.ONE);
-//
-// while(Simulation.TIMELINE.hasNext())
-// {
-// Simulation.TIMELINE.executeNext();
-// }
-//
-// assertEquals(Simulation.TIMELINE.getSimulationTime(), 14);
-// assertEquals(Bit.ONE, j.getValue());
-// assertEquals(Bit.ZERO, k.getValue());
-// }
-//
-// @Test
-// void splitterTest()
-// {
-// Simulation.TIMELINE.reset();
-// WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), in = new WireArray(8, 1);
-// in.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO,Bit.ONE, Bit.ZERO, Bit.ONE);
-// new Splitter(in, a, b, c);
-//
-// while(Simulation.TIMELINE.hasNext())
-// {
-// Simulation.TIMELINE.executeNext();
-// }
-//
-// assertTrue(Arrays.equals(a.getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO }));
-// assertTrue(Arrays.equals(b.getValues(), new Bit[] { Bit.ONE, Bit.ZERO }));
-// assertTrue(Arrays.equals(c.getValues(), new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE }));
-// }
-//
-// @Test
-// void mergerTest()
-// {
-// Simulation.TIMELINE.reset();
-// WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), out = new WireArray(8, 1);
-// a.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
-// b.createInput().feedSignals(Bit.ONE, Bit.ZERO);
-// c.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
-//
-// new Merger2(out, a, b, c);
-//
-// while(Simulation.TIMELINE.hasNext())
-// {
-// Simulation.TIMELINE.executeNext();
-// }
-//
-// assertTrue(Arrays.equals(out.getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }));
-// }
-
- @Test
- void muxTest()
- {
- Simulation.TIMELINE.reset();
- WireArray a = new WireArray(1, 3), b = new WireArray(1, 2), select = new WireArray(1, 1), out = new WireArray(1, 1);
- WireArrayInput selectIn = select.createInput();
-
- selectIn.feedSignals(Bit.ZERO);
- a.createInput().feedSignals(Bit.ONE);
- b.createInput().feedSignals(Bit.ZERO);
-
- new Mux2(1, out, select, a, b);
- assertEquals(Bit.Z, out.getValue());
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(Bit.ONE, out.getValue());
- selectIn.feedSignals(Bit.ONE);
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(out.getValue(), Bit.ZERO);
- }
-
- @Test
- void andTest()
- {
- Simulation.TIMELINE.reset();
- AndGate gate = new AndGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
- gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
- gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
-
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
- assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO }));
- }
-
- @Test
- void orTest()
- {
- Simulation.TIMELINE.reset();
- OrGate gate = new OrGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
- gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
- gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE }));
- }
-
- @Test
- void rsLatchCircuitTest()
- {
- Simulation.TIMELINE.reset();
- WireArray r = new WireArray(1, 1), s = new WireArray(1, 1), t1 = new WireArray(1, 15), t2 = new WireArray(1, 1), q = new WireArray(1, 1),
- nq = new WireArray(1, 1);
-
- new OrGate(1, r, nq, t2);
- new OrGate(1, s, q, t1);
- new NotGate(1, t2, q);
- new NotGate(1, t1, nq);
-
- WireArrayInput sIn = s.createInput(), rIn = r.createInput();
-
- sIn.feedSignals(Bit.ONE);
- rIn.feedSignals(Bit.ZERO);
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(q.getValue(), Bit.ONE);
- assertEquals(nq.getValue(), Bit.ZERO);
-
- sIn.feedSignals(Bit.ZERO);
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(q.getValue(), Bit.ONE);
- assertEquals(nq.getValue(), Bit.ZERO);
-
- rIn.feedSignals(Bit.ONE);
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(q.getValue(), Bit.ZERO);
- assertEquals(nq.getValue(), Bit.ONE);
- }
-
- @Test
- void numericValueTest()
- {
- Simulation.TIMELINE.reset();
-
- WireArray a = new WireArray(4, 1);
- a.createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
-
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
-
- assertEquals(a.getUnsignedValue(), 15);
- assertEquals(a.getSignedValue(), -1);
- }
-
- @Test
- void multipleInputs()
- {
- Simulation.TIMELINE.reset();
- WireArray w = new WireArray(2, 1);
- WireArrayInput wI1 = w.createInput(), wI2 = w.createInput();
- wI1.feedSignals(Bit.ONE, Bit.Z);
- wI2.feedSignals(Bit.Z, Bit.X);
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
- assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.X }));
-
- wI2.feedSignals(Bit.ZERO, Bit.Z);
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
- assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.X, Bit.Z }));
-
- wI2.feedSignals(Bit.Z, Bit.Z);
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
- assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
-
- wI2.feedSignals(Bit.ONE, Bit.Z);
- w.addObserver((i) -> fail("WireArray notified observer, although value did not change."));
- while(Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- }
- assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
- }
-
- @Test
- void wireConnections()
- {
- // Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
-
- Simulation.TIMELINE.reset();
-
- WireArray a = new WireArray(1, 2);
- WireArray b = new WireArray(1, 2);
- WireArray c = new WireArray(1, 2);
- WireArrayInput aI = a.createInput();
- WireArrayInput bI = b.createInput();
- WireArrayInput cI = c.createInput();
-
- TestBitDisplay test = new TestBitDisplay(c);
- LongConsumer print = time -> System.out.format("Time %2d\n %s\n %s\n %s\n", time, a, b, c);
-
- cI.feedSignals(Bit.ONE);
- test.assertAfterSimulationIs(print, Bit.ONE);
-
- cI.feedSignals(Bit.X);
- test.assertAfterSimulationIs(print, Bit.X);
-
- cI.feedSignals(Bit.X);
- cI.feedSignals(Bit.Z);
- test.assertAfterSimulationIs(print, Bit.Z);
-
- Connector c1 = new Connector(b, c);
- test.assertAfterSimulationIs(print, Bit.Z);
- System.out.println("ONE");
- bI.feedSignals(Bit.ONE);
- test.assertAfterSimulationIs(print, Bit.ONE);
- System.out.println("ZERO");
- bI.feedSignals(Bit.ZERO);
- test.assertAfterSimulationIs(print, Bit.ZERO);
- System.out.println("Z");
- bI.feedSignals(Bit.Z);
- test.assertAfterSimulationIs(Bit.Z);
- }
-
- private static void assertBitArrayEquals(Bit[] actual, Bit... expected)
- {
- assertArrayEquals(expected, actual);
- }
-}
+++ /dev/null
-package era.mi.logic.tests;
-
-import era.mi.logic.Simulation;
-import era.mi.logic.wires.WireArray;
-import era.mi.logic.wires.WireArray.WireArrayInput;
-import era.mi.logic.wires.WireArrayObserver;
-
-public class Connector implements WireArrayObserver
-{
- private final WireArray a;
- private final WireArray b;
- private final WireArrayInput aI;
- private final WireArrayInput bI;
-
- public Connector(WireArray a, WireArray b)
- {
- if (a.length != b.length)
- throw new IllegalArgumentException("WireArray width does not match: " + a.length + ", " + b.length);
- this.a = a;
- this.b = b;
- a.addObserver(this);
- b.addObserver(this);
- aI = a.createInput();
- bI = b.createInput();
- }
-
- @Override
- public void update(WireArray initiator)
- {
- Simulation.TIMELINE.addEvent((e) ->
- {
- if (initiator == a)
- bI.feedSignals(a.getValues());
- else
- aI.feedSignals(b.getValues());
- }, 1);
- }
-}
+++ /dev/null
-package era.mi.logic.tests;
-
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-
-import java.util.Arrays;
-import java.util.function.LongConsumer;
-
-import era.mi.logic.Bit;
-import era.mi.logic.Simulation;
-import era.mi.logic.components.BitDisplay;
-import era.mi.logic.wires.WireArray;
-
-public final class TestBitDisplay extends BitDisplay
-{
-
- public TestBitDisplay(WireArray in)
- {
- super(in);
- }
-
- public void assertDisplays(Bit... expected)
- {
- assertArrayEquals(expected, getDisplayedValue());
- }
-
- public void assertAfterSimulationIs(Bit... expected)
- {
- Simulation.TIMELINE.executeAll();
- assertDisplays(expected);
- }
-
- public void assertAfterSimulationIs(LongConsumer r, Bit... expected)
- {
- while (Simulation.TIMELINE.hasNext())
- {
- Simulation.TIMELINE.executeNext();
- r.accept(Simulation.TIMELINE.getSimulationTime());
- }
- assertDisplays(expected);
- }
-
- @Override
- protected void compute()
- {
- super.compute();
- System.out.println("update: value is " + Arrays.toString(getDisplayedValue()));
- }
-}
+++ /dev/null
-package era.mi.logic.timeline;
-
-import java.util.PriorityQueue;
-
-/**
- * Orders Events by the time they are due to be executed. Can execute Events individually.
- * @author Fabian Stemmler
- *
- */
-public class Timeline
-{
- private PriorityQueue<InnerEvent> events;
- private long currentTime = 0;
-
- public Timeline(int initCapacity)
- {
- events = new PriorityQueue<InnerEvent>(initCapacity, (a, b) -> {
- long difference = a.getTiming() - b.getTiming();
- if(difference == 0)
- return 0;
- return difference < 0 ? -1 : 1;
- });
- }
-
- public boolean hasNext()
- {
- return !events.isEmpty();
- }
-
- public void executeNext()
- {
- InnerEvent first = events.poll();
- currentTime = first.getTiming();
- first.run();
- }
-
- public void executeAll()
- {
- while (hasNext())
- executeNext();
- }
-
- public long getSimulationTime()
- {
- return currentTime;
- }
-
- public void reset()
- {
- events.clear();
- currentTime = 0;
- }
-
- /**
- * Adds an Event to the {@link Timeline}
- * @param function The {@link TimelineEventHandler} that will be executed, when the {@link InnerEvent} occurs on the timeline.
- * @param relativeTiming The amount of MI ticks in which the {@link InnerEvent} is called, starting from the current time.
- */
- public void addEvent(TimelineEventHandler function, int relativeTiming)
- {
- long timing = currentTime + relativeTiming;
- events.add(new InnerEvent(function, new TimelineEvent(timing), timing));
- }
-
- private class InnerEvent
- {
-
- private final long timing;
- private final TimelineEventHandler function;
- private final TimelineEvent event;
-
- /**
- * Creates an {@link InnerEvent}
- * @param function {@link TimelineEventHandler} to be executed when the {@link InnerEvent} occurs
- * @param timing Point in the MI simulation {@link Timeline}, at which the {@link InnerEvent} is executed;
- */
- InnerEvent(TimelineEventHandler function, TimelineEvent event, long timing)
- {
- this.function = function;
- this.event = event;
- this.timing = timing;
- }
-
- public long getTiming()
- {
- return timing;
- }
-
- public void run()
- {
- function.handle(event);
- }
-
- }
-}
\ No newline at end of file
+++ /dev/null
-package era.mi.logic.timeline;
-
-public class TimelineEvent
-{
- private final long timing;
-
- TimelineEvent(long timing)
- {
- super();
- this.timing = timing;
- }
-
- public long getTiming()
- {
- return timing;
- }
-}
\ No newline at end of file
+++ /dev/null
-package era.mi.logic.timeline;
-
-public interface TimelineEventHandler
-{
- public void handle(TimelineEvent e);
-}
\ No newline at end of file
+++ /dev/null
-package era.mi.logic.wires;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Iterator;
-import java.util.List;
-
-import era.mi.logic.Bit;
-import era.mi.logic.Simulation;
-
-/**
- * Represents an array of wires that can store n bits of information.
- * @author Fabian Stemmler
- *
- */
-public class WireArray
-{
- private Bit[] values;
- public final int travelTime;
- private List<WireArrayObserver> observers = new ArrayList<WireArrayObserver>();
- public final int length;
- private List<WireArrayInput> inputs = new ArrayList<WireArrayInput>();
-
- public WireArray(int length, int travelTime)
- {
- if(length < 1)
- throw new IllegalArgumentException("Tried to create an array of wires with length " + length + ", but a length of less than 1 makes no sense.");
- this.length = length;
- this.travelTime = travelTime;
- initValues();
- }
-
- private void initValues()
- {
- values = new Bit[length];
- for(int i = 0; i < length; i++)
- values[i] = Bit.Z;
- }
-
- private void recalculateSingleInput()
- {
- WireArrayInput input = inputs.get(0);
- if(!Arrays.equals(input.getValues(), values))
- {
- System.arraycopy(input.getValues(), 0, values, 0, length);
- notifyObservers();
- }
- }
-
- private void recalculateMultipleInputs()
- {
- Iterator<WireArrayInput> it = inputs.iterator();
- Bit[] newValues = it.next().values.clone();
-
- while(it.hasNext())
- {
- WireArrayInput input = it.next();
- Bit[] bits = input.getValues();
- for(int i = 0; i < length; i++)
- {
- if(Bit.Z.equals(bits[i]) || newValues[i].equals(bits[i]))
- continue;
- else if(Bit.Z.equals(newValues[i]))
- newValues[i] = bits[i];
- else
- newValues[i] = Bit.X;
- }
- }
-
- if(!Arrays.equals(newValues, values))
- {
- notifyObservers();
- values = newValues;
- }
- }
-
- private void recalculate()
- {
- switch(inputs.size())
- {
- case 0:
- return;
- case 1:
- recalculateSingleInput();
- break;
- default:
- recalculateMultipleInputs();
- }
- }
-
- /**
- * The WireArray is interpreted as an unsigned integer with n bits.
- * @return <code>true</code> if all bits are either <code>Bit.ONE</code> or <code>Bit.ZERO</code> (they do not all have to have the same value), not <code>Bit.X</code> or <code>Bit.Z</code>. <code>false</code> is returned otherwise.
- *
- * @author Fabian Stemmler
- */
- public boolean hasNumericValue()
- {
- for(Bit b : values)
- {
- if(b != Bit.ZERO && b != Bit.ONE)
- return false;
- }
- return true;
- }
-
- /**
- * The WireArray is interpreted as an unsigned integer with n bits.
- * @return The unsigned value of the {@link WireArray}'s bits, where value 0 corresponds with 2^0, value 1 is 2^1 and so on.
- *
- * @author Fabian Stemmler
- */
- public long getUnsignedValue()
- {
- long val = 0;
- long mask = 1;
- for(int i = 0; i < length; i++)
- {
- switch(values[i])
- {
- default:
- case Z:
- case X:
- return 0; //TODO: Proper handling for getUnsignedValue(), if not all bits are 1 or 0; Random number?
- case ONE:
- val |= mask;
- break;
- case ZERO:
- }
- mask = mask << 1;
- }
- return val;
- }
-
- /**
- * The WireArray is interpreted as a signed integer with n bits.
- * @return The signed value of the {@link WireArray}'s bits, where value 0 corresponds with 2^0, value 1 is 2^1 and so on.
- *
- * @author Fabian Stemmler
- */
- public long getSignedValue()
- {
- long val = getUnsignedValue();
- long mask = 1 << (length - 1);
- if((mask & val) != 0)
- {
- int shifts = 64 - length;
- return (val << shifts) >> shifts;
- }
- return val;
- }
-
- /**
- * Included for convenient use on {@link WireArray}s of length 1.
- * @return The value of bit 0.
- *
- * @author Fabian Stemmler
- */
- public Bit getValue()
- {
- return getValue(0);
- }
-
- /**
- *
- * @param index Index of the requested bit.
- * @return The value of the indexed bit.
- *
- * @author Fabian Stemmler
- */
- public Bit getValue(int index)
- {
- return values[index];
- }
-
- public Bit[] getValues(int start, int end)
- {
- int length = end - start;
- Bit[] bits = new Bit[length];
- System.arraycopy(values, start, bits, 0, length);
- return bits;
- }
-
-
- /**
- * @return An array of length n containing the values of the n bits in the {@link WireArray}. Can be safely modified.
- *
- * @author Fabian Stemmler
- */
- public Bit[] getValues()
- {
- return values.clone();
- }
-
- /**
- * Adds an {@link WireArrayObserver}, who will be notified when the value of the {@link WireArray} is updated.
- * @param ob The {@link WireArrayObserver} to be notified of changes.
- * @return true if the given {@link WireArrayObserver} was not already registered, false otherwise
- *
- * @author Fabian Stemmler
- */
- public boolean addObserver(WireArrayObserver ob)
- {
- return observers.add(ob);
- }
-
- private void notifyObservers()
- {
- for(WireArrayObserver o : observers)
- o.update(this);
- }
-
- public WireArrayInput createInput()
- {
- return new WireArrayInput(this);
- }
-
- private void registerInput(WireArrayInput toRegister)
- {
- inputs.add(toRegister);
- }
-
- public class WireArrayInput {
- public final WireArray owner;
- private Bit[] values;
-
- private WireArrayInput(WireArray owner) {
- super();
- this.owner = owner;
- initValues();
- owner.registerInput(this);
- }
-
- private void initValues()
- {
- values = new Bit[length];
- for(int i = 0; i < length; i++)
- values[i] = Bit.Z;
- }
-
- /**
- * Sets the wires values. This takes up time, as specified by the {@link WireArray}s travel time.
- * @param newValues The new values the wires should take on.
- *
- * @author Fabian Stemmler
- */
- public void feedSignals(Bit... newValues)
- {
- if(newValues.length == length)
- {
- feedSignals(0, newValues);
- }
- else
- throw new IllegalArgumentException("Attempted to input " + newValues.length + " bits instead of " + length + " bits.");
- }
-
- /**
- * Sets values of a subarray of wires. This takes up time, as specified by the {@link WireArray}s travel time.
- * @param newValues The new values the wires should take on.
- * @param startingBit The first index of the subarray of wires.
- *
- * @author Fabian Stemmler
- */
- public void feedSignals(int startingBit, Bit... newValues)
- {
- Simulation.TIMELINE.addEvent((e) -> setValues(startingBit, newValues), travelTime);
- }
-
- private void setValues(int startingBit, Bit... newValues)
- {
- int exclLastIndex = startingBit + newValues.length;
- if(length < exclLastIndex)
- throw new ArrayIndexOutOfBoundsException("Attempted to input bits from index " + startingBit + " to "
- + exclLastIndex + " when there are only " + length + "wires.");
- if(!Arrays.equals(values, startingBit, exclLastIndex, newValues, 0, newValues.length))
- {
- System.arraycopy(newValues, 0, values, startingBit, newValues.length);
- owner.recalculate();
- }
- }
-
- public Bit[] getValues()
- {
- return values.clone();
- }
-
- public void clearSignals()
- {
- Bit[] bits = new Bit[length];
- for(int i = 0; i < length; i++)
- bits[i] = Bit.Z;
- feedSignals(bits);
- }
-
- @Override
- public String toString()
- {
- return Arrays.toString(values);
- }
- }
-
- @Override
- public String toString()
- {
- return String.format("wire 0x%08x value: %s inputs: %s", hashCode(), Arrays.toString(values), inputs);
- }
-}
+++ /dev/null
-package era.mi.logic.wires;
-
-public interface WireArrayObserver
-{
- public void update(WireArray initiator);
-}
projects / Mograsim.git / commitdiff