* @author Fabian Stemmler
*
*/
-public class WireArray
-{
+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)
- {
+ public WireArray(int length, int travelTime) {
if (length < 1)
- throw new IllegalArgumentException(String.format("Tried to create an array of wires with length %d, but a length of less than 1 makes no sense.", length));
+ throw new IllegalArgumentException(
+ String.format("Tried to create an array of wires with length %d, but a length of less than 1 makes no sense.", length));
this.length = length;
this.travelTime = travelTime;
initValues();
}
- private void initValues()
- {
+ private void initValues() {
values = Bit.Z.makeArray(length);
}
- private void recalculateSingleInput()
- {
+ private void recalculateSingleInput() {
WireArrayInput input = inputs.get(0);
- if (!Arrays.equals(input.getValues(), values))
- {
+ if (!Arrays.equals(input.getValues(), values)) {
Bit[] oldValues = values.clone();
System.arraycopy(input.getValues(), 0, values, 0, length);
notifyObservers(oldValues);
}
}
- private void recalculateMultipleInputs()
- {
+ private void recalculateMultipleInputs() {
Iterator<WireArrayInput> it = inputs.iterator();
Bit[] newValues = it.next().inputValues.clone();
- while (it.hasNext())
- {
+ while (it.hasNext()) {
WireArrayInput input = it.next();
Bit[] bits = input.getValues();
- for (int i = 0; i < length; i++)
- {
+ 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]))
}
}
- if (!Arrays.equals(newValues, values))
- {
+ if (!Arrays.equals(newValues, values)) {
Bit[] oldValues = values;
values = newValues;
notifyObservers(oldValues);
}
}
- private void recalculate()
- {
- switch (inputs.size())
- {
+ private void recalculate() {
+ switch (inputs.size()) {
case 0:
return;
case 1:
/**
* 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.
+ * @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)
- {
+ public boolean hasNumericValue() {
+ for (Bit b : values) {
if (b != Bit.ZERO && b != Bit.ONE)
return false;
}
/**
* 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.
+ * @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()
- {
+ public long getUnsignedValue() {
long val = 0;
long mask = 1;
- for (int i = 0; i < length; i++)
- {
- switch (values[i])
- {
+ for (int i = 0; i < length; i++) {
+ switch (values[i]) {
default:
case Z:
case X:
/**
* 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.
+ * @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()
- {
+ public long getSignedValue() {
long val = getUnsignedValue();
long mask = 1 << (length - 1);
- if ((mask & val) != 0)
- {
+ if ((mask & val) != 0) {
int shifts = 64 - length;
return (val << shifts) >> shifts;
}
*
* @author Fabian Stemmler
*/
- public Bit getValue()
- {
+ public Bit getValue() {
return getValue(0);
}
*
* @author Fabian Stemmler
*/
- public Bit getValue(int index)
- {
+ public Bit getValue(int index) {
return values[index];
}
- public Bit[] getValues(int start, int end)
- {
+ public Bit[] getValues(int start, int end) {
int length = end - start;
Bit[] bits = new Bit[length];
System.arraycopy(values, start, bits, 0, length);
}
/**
- * @return An array of length n containing the values of the n bits in the
- * {@link WireArray}. Can be safely modified.
+ * @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()
- {
+ public Bit[] getValues() {
return values.clone();
}
/**
- * Adds an {@link WireArrayObserver}, who will be notified when the value of the
- * {@link WireArray} is updated.
+ * 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
+ * @return true if the given {@link WireArrayObserver} was not already registered, false otherwise
*
* @author Fabian Stemmler
*/
- public boolean addObserver(WireArrayObserver ob)
- {
+ public boolean addObserver(WireArrayObserver ob) {
return observers.add(ob);
}
- private void notifyObservers(Bit[] oldValues)
- {
+ private void notifyObservers(Bit[] oldValues) {
for (WireArrayObserver o : observers)
o.update(this, oldValues);
}
/**
- * Create and register a {@link WireArrayInput} object, which is tied to this
- * {@link WireArray}.
+ * Create and register a {@link WireArrayInput} object, which is tied to this {@link WireArray}.
*/
- public WireArrayInput createInput()
- {
+ public WireArrayInput createInput() {
return new WireArrayInput(this);
}
- private void registerInput(WireArrayInput toRegister)
- {
+ private void registerInput(WireArrayInput toRegister) {
inputs.add(toRegister);
}
/**
- * A {@link WireArrayInput} feeds a constant signal into the {@link WireArray}
- * it is tied to. The combination of all inputs determines the
- * {@link WireArray}s final value. X dominates all other inputs Z does not
- * affect the final value, unless there are no other inputs than Z 0 and 1 turn
- * into X when they are mixed
+ * A {@link WireArrayInput} feeds a constant signal into the {@link WireArray} it is tied to. The combination of all inputs determines
+ * the {@link WireArray}s final value. X dominates all other inputs Z does not affect the final value, unless there are no other inputs
+ * than Z 0 and 1 turn into X when they are mixed
*
* @author Fabian Stemmler
*/
- public class WireArrayInput
- {
+ public class WireArrayInput {
public final WireArray owner;
private Bit[] inputValues;
- private WireArrayInput(WireArray owner)
- {
+ private WireArrayInput(WireArray owner) {
super();
this.owner = owner;
initValues();
owner.registerInput(this);
}
- private void initValues()
- {
+ private void initValues() {
inputValues = Bit.Z.makeArray(length);
}
/**
- * Sets the wires values. This takes up time, as specified by the
- * {@link WireArray}s travel time.
+ * 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)
- {
+ public void feedSignals(Bit... newValues) {
+ if (newValues.length == length) {
feedSignals(0, newValues);
} else
- throw new IllegalArgumentException(String.format("Attempted to input %o bits instead of %o bits.", newValues.length, length));
+ throw new IllegalArgumentException(
+ String.format("Attempted to input %o bits instead of %o bits.", newValues.length, length));
}
/**
- * Sets values of a subarray of wires. This takes up time, as specified by the
- * {@link WireArray}s travel time.
+ * 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)
- {
+ public void feedSignals(int startingBit, Bit... newValues) {
Simulation.TIMELINE.addEvent((e) -> setValues(startingBit, newValues), travelTime);
}
- private void setValues(int startingBit, Bit... newValues)
- {
+ private void setValues(int startingBit, Bit... newValues) {
int exclLastIndex = startingBit + newValues.length;
if (length < exclLastIndex)
- throw new ArrayIndexOutOfBoundsException(String.format("Attempted to input bits from index %o to %o when there are only %o wires.", startingBit, exclLastIndex - 1, length));
- if (!Arrays.equals(inputValues, startingBit, exclLastIndex, newValues, 0, newValues.length))
- {
+ throw new ArrayIndexOutOfBoundsException(
+ String.format("Attempted to input bits from index %o to %o when there are only %o wires.", startingBit,
+ exclLastIndex - 1, length));
+ if (!Arrays.equals(inputValues, startingBit, exclLastIndex, newValues, 0, newValues.length)) {
System.arraycopy(newValues, 0, inputValues, startingBit, newValues.length);
owner.recalculate();
}
}
/**
- * Returns a copy (safe to modify) of the values the {@link WireArrayInput} is currently feeding into the associated {@link WireArray}.
+ * Returns a copy (safe to modify) of the values the {@link WireArrayInput} is currently feeding into the associated
+ * {@link WireArray}.
*/
- public Bit[] getValues()
- {
+ public Bit[] getValues() {
return inputValues.clone();
}
/**
* {@link WireArrayInput} now feeds Z into the associated {@link WireArray}.
*/
- public void clearSignals()
- {
+ public void clearSignals() {
feedSignals(Bit.Z.makeArray(length));
}
- public Bit[] wireValuesExcludingMe()
- {
+ public Bit[] wireValuesExcludingMe() {
Bit[] bits = Bit.Z.makeArray(length);
- for (WireArrayInput wai : inputs)
- {
- if(wai == this)
+ for (WireArrayInput wai : inputs) {
+ if (wai == this)
continue;
Util.combineInto(bits, wai.getValues());
}
return bits;
}
-
+
@Override
- public String toString()
- {
+ public String toString() {
return Arrays.toString(inputValues);
}
}
@Override
- public String toString()
- {
+ public String toString() {
return String.format("wire 0x%08x value: %s inputs: %s", hashCode(), Arrays.toString(values), inputs);
}
- public static WireArrayInput[] extractInputs(WireArray[] w)
- {
+ public static WireArrayInput[] extractInputs(WireArray[] w) {
WireArrayInput[] inputs = new WireArrayInput[w.length];
for (int i = 0; i < w.length; i++)
inputs[i] = w[i].createInput();
projects / Mograsim.git / blobdiff