package era.mi.logic.wires;
+import java.io.Closeable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
public final int travelTime;
private List<WireArrayObserver> observers = new ArrayList<WireArrayObserver>();
public final int length;
- private List<WireArrayInput> inputs = new ArrayList<WireArrayInput>();
+ private List<WireArrayEnd> inputs = new ArrayList<WireArrayEnd>();
public WireArray(int length, int travelTime)
{
if (length < 1)
- throw new IllegalArgumentException(String.format("Tried to create an array of wires with length %o, 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()
{
- values = Bit.Z.makeArray(length);
+ values = Bit.U.makeArray(length);
}
private void recalculateSingleInput()
{
- WireArrayInput input = inputs.get(0);
+ WireArrayEnd input = inputs.get(0);
if (!Arrays.equals(input.getValues(), values))
{
Bit[] oldValues = values.clone();
private void recalculateMultipleInputs()
{
- Iterator<WireArrayInput> it = inputs.iterator();
+ Iterator<WireArrayEnd> it = inputs.iterator();
Bit[] newValues = it.next().inputValues.clone();
while (it.hasNext())
{
- WireArrayInput input = it.next();
+ WireArrayEnd 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;
+ newValues[i] = newValues[i].combineWith(bits[i]);
}
}
/**
* 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
*/
/**
* 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
*/
/**
* 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
*/
}
/**
- * @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
*/
}
/**
- * 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
*/
}
/**
- * Create and register a {@link WireArrayInput} object, which is tied to this
- * {@link WireArray}.
+ * Create and register a {@link WireArrayEnd} object, which is tied to this {@link WireArray}.
*/
- public WireArrayInput createInput()
+ public WireArrayEnd createInput()
{
- return new WireArrayInput(this);
+ return new WireArrayEnd(this);
}
- private void registerInput(WireArrayInput toRegister)
+ private void registerInput(WireArrayEnd 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 WireArrayEnd} 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 WireArrayEnd implements Closeable
{
public final WireArray owner;
+ private boolean open;
private Bit[] inputValues;
- private WireArrayInput(WireArray owner)
+ private WireArrayEnd(WireArray owner)
{
super();
this.owner = owner;
+ open = true;
initValues();
owner.registerInput(this);
}
private void initValues()
{
- inputValues = Bit.Z.makeArray(length);
+ inputValues = Bit.U.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.
*
{
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 %d bits instead of %d 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.
*/
public void feedSignals(int startingBit, Bit... newValues)
{
+ if (!open)
+ throw new RuntimeException("Attempted to write to closed WireArrayEnd.");
Simulation.TIMELINE.addEvent((e) -> setValues(startingBit, newValues), travelTime);
}
{
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));
+ throw new ArrayIndexOutOfBoundsException(
+ String.format("Attempted to input bits from index %d to %d when there are only %d wires.", startingBit,
+ exclLastIndex - 1, length));
if (!Arrays.equals(inputValues, startingBit, exclLastIndex, newValues, 0, newValues.length))
{
System.arraycopy(newValues, 0, inputValues, startingBit, newValues.length);
}
/**
- * 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 WireArrayEnd} is currently feeding into the associated
+ * {@link WireArray}.
*/
public Bit[] getValues()
{
}
/**
- * {@link WireArrayInput} now feeds Z into the associated {@link WireArray}.
+ * {@link WireArrayEnd} now feeds Z into the associated {@link WireArray}.
*/
public void clearSignals()
{
feedSignals(Bit.Z.makeArray(length));
}
- public Bit[] wireValuesExcludingMe()
+ public Bit[] wireValuesExcludingMe()
{
Bit[] bits = Bit.Z.makeArray(length);
- for (WireArrayInput wai : inputs)
+ for (WireArrayEnd wai : inputs)
{
- if(wai == this)
+ if (wai == this)
continue;
Util.combineInto(bits, wai.getValues());
}
return bits;
}
-
+
+ public Bit getWireValue()
+ {
+ return owner.getValue();
+ }
+
+ public Bit[] getWireValues()
+ {
+ return owner.getValues();
+ }
+
@Override
public String toString()
{
return Arrays.toString(inputValues);
}
+
+ @Override
+ public void close()
+ {
+ inputs.remove(this);
+ open = false;
+ }
}
@Override
return String.format("wire 0x%08x value: %s inputs: %s", hashCode(), Arrays.toString(values), inputs);
}
- public static WireArrayInput[] extractInputs(WireArray[] w)
+ public static WireArrayEnd[] extractInputs(WireArray[] w)
{
- WireArrayInput[] inputs = new WireArrayInput[w.length];
+ WireArrayEnd[] inputs = new WireArrayEnd[w.length];
for (int i = 0; i < w.length; i++)
inputs[i] = w[i].createInput();
return inputs;
projects / Mograsim.git / blobdiff