package era.mi.logic.wires;\r
\r
+import java.io.Closeable;\r
import java.util.ArrayList;\r
import java.util.Arrays;\r
import java.util.Iterator;\r
* @author Fabian Stemmler\r
*\r
*/\r
-public class WireArray {\r
+public class WireArray\r
+{\r
private Bit[] values;\r
public final int travelTime;\r
private List<WireArrayObserver> observers = new ArrayList<WireArrayObserver>();\r
public final int length;\r
- private List<WireArrayInput> inputs = new ArrayList<WireArrayInput>();\r
+ private List<WireArrayEnd> inputs = new ArrayList<WireArrayEnd>();\r
\r
- public WireArray(int length, int travelTime) {\r
+ public WireArray(int length, int travelTime)\r
+ {\r
if (length < 1)\r
throw new IllegalArgumentException(\r
String.format("Tried to create an array of wires with length %d, but a length of less than 1 makes no sense.", length));\r
initValues();\r
}\r
\r
- private void initValues() {\r
- values = Bit.Z.makeArray(length);\r
+ private void initValues()\r
+ {\r
+ values = Bit.U.makeArray(length);\r
}\r
\r
- private void recalculateSingleInput() {\r
- WireArrayInput input = inputs.get(0);\r
- if (!Arrays.equals(input.getValues(), values)) {\r
+ private void recalculateSingleInput()\r
+ {\r
+ WireArrayEnd input = inputs.get(0);\r
+ if (!Arrays.equals(input.getValues(), values))\r
+ {\r
Bit[] oldValues = values.clone();\r
System.arraycopy(input.getValues(), 0, values, 0, length);\r
notifyObservers(oldValues);\r
}\r
}\r
\r
- private void recalculateMultipleInputs() {\r
- Iterator<WireArrayInput> it = inputs.iterator();\r
+ private void recalculateMultipleInputs()\r
+ {\r
+ Iterator<WireArrayEnd> it = inputs.iterator();\r
Bit[] newValues = it.next().inputValues.clone();\r
\r
- while (it.hasNext()) {\r
- WireArrayInput input = it.next();\r
+ while (it.hasNext())\r
+ {\r
+ WireArrayEnd input = it.next();\r
Bit[] bits = input.getValues();\r
- for (int i = 0; i < length; i++) {\r
+ for (int i = 0; i < length; i++)\r
+ {\r
if (Bit.Z.equals(bits[i]) || newValues[i].equals(bits[i]))\r
continue;\r
else if (Bit.Z.equals(newValues[i]))\r
}\r
}\r
\r
- if (!Arrays.equals(newValues, values)) {\r
+ if (!Arrays.equals(newValues, values))\r
+ {\r
Bit[] oldValues = values;\r
values = newValues;\r
notifyObservers(oldValues);\r
}\r
}\r
\r
- private void recalculate() {\r
- switch (inputs.size()) {\r
+ private void recalculate()\r
+ {\r
+ switch (inputs.size())\r
+ {\r
case 0:\r
return;\r
case 1:\r
* \r
* @author Fabian Stemmler\r
*/\r
- public boolean hasNumericValue() {\r
- for (Bit b : values) {\r
+ public boolean hasNumericValue()\r
+ {\r
+ for (Bit b : values)\r
+ {\r
if (b != Bit.ZERO && b != Bit.ONE)\r
return false;\r
}\r
* \r
* @author Fabian Stemmler\r
*/\r
- public long getUnsignedValue() {\r
+ public long getUnsignedValue()\r
+ {\r
long val = 0;\r
long mask = 1;\r
- for (int i = 0; i < length; i++) {\r
- switch (values[i]) {\r
+ for (int i = 0; i < length; i++)\r
+ {\r
+ switch (values[i])\r
+ {\r
default:\r
case Z:\r
case X:\r
* \r
* @author Fabian Stemmler\r
*/\r
- public long getSignedValue() {\r
+ public long getSignedValue()\r
+ {\r
long val = getUnsignedValue();\r
long mask = 1 << (length - 1);\r
- if ((mask & val) != 0) {\r
+ if ((mask & val) != 0)\r
+ {\r
int shifts = 64 - length;\r
return (val << shifts) >> shifts;\r
}\r
* \r
* @author Fabian Stemmler\r
*/\r
- public Bit getValue() {\r
+ public Bit getValue()\r
+ {\r
return getValue(0);\r
}\r
\r
* \r
* @author Fabian Stemmler\r
*/\r
- public Bit getValue(int index) {\r
+ public Bit getValue(int index)\r
+ {\r
return values[index];\r
}\r
\r
- public Bit[] getValues(int start, int end) {\r
+ public Bit[] getValues(int start, int end)\r
+ {\r
int length = end - start;\r
Bit[] bits = new Bit[length];\r
System.arraycopy(values, start, bits, 0, length);\r
* \r
* @author Fabian Stemmler\r
*/\r
- public Bit[] getValues() {\r
+ public Bit[] getValues()\r
+ {\r
return values.clone();\r
}\r
\r
* \r
* @author Fabian Stemmler\r
*/\r
- public boolean addObserver(WireArrayObserver ob) {\r
+ public boolean addObserver(WireArrayObserver ob)\r
+ {\r
return observers.add(ob);\r
}\r
\r
- private void notifyObservers(Bit[] oldValues) {\r
+ private void notifyObservers(Bit[] oldValues)\r
+ {\r
for (WireArrayObserver o : observers)\r
o.update(this, oldValues);\r
}\r
\r
/**\r
- * Create and register a {@link WireArrayInput} object, which is tied to this {@link WireArray}.\r
+ * Create and register a {@link WireArrayEnd} object, which is tied to this {@link WireArray}.\r
*/\r
- public WireArrayInput createInput() {\r
- return new WireArrayInput(this);\r
+ public WireArrayEnd createInput()\r
+ {\r
+ return new WireArrayEnd(this);\r
}\r
\r
- private void registerInput(WireArrayInput toRegister) {\r
+ private void registerInput(WireArrayEnd toRegister)\r
+ {\r
inputs.add(toRegister);\r
}\r
\r
/**\r
- * A {@link WireArrayInput} feeds a constant signal into the {@link WireArray} it is tied to. The combination of all inputs determines\r
- * the {@link WireArray}s final value. X dominates all other inputs Z does not affect the final value, unless there are no other inputs\r
- * than Z 0 and 1 turn into X when they are mixed\r
+ * A {@link WireArrayEnd} feeds a constant signal into the {@link WireArray} it is tied to. The combination of all inputs determines the\r
+ * {@link WireArray}s final value. X dominates all other inputs Z does not affect the final value, unless there are no other inputs than\r
+ * Z 0 and 1 turn into X when they are mixed\r
* \r
* @author Fabian Stemmler\r
*/\r
- public class WireArrayInput {\r
+ public class WireArrayEnd implements Closeable\r
+ {\r
public final WireArray owner;\r
+ private boolean open;\r
private Bit[] inputValues;\r
\r
- private WireArrayInput(WireArray owner) {\r
+ private WireArrayEnd(WireArray owner)\r
+ {\r
super();\r
this.owner = owner;\r
+ open = true;\r
initValues();\r
owner.registerInput(this);\r
}\r
\r
- private void initValues() {\r
+ private void initValues()\r
+ {\r
inputValues = Bit.Z.makeArray(length);\r
}\r
\r
* \r
* @author Fabian Stemmler\r
*/\r
- public void feedSignals(Bit... newValues) {\r
- if (newValues.length == length) {\r
+ public void feedSignals(Bit... newValues)\r
+ {\r
+ if (newValues.length == length)\r
+ {\r
feedSignals(0, newValues);\r
} else\r
throw new IllegalArgumentException(\r
- String.format("Attempted to input %o bits instead of %o bits.", newValues.length, length));\r
+ String.format("Attempted to input %d bits instead of %d bits.", newValues.length, length));\r
}\r
\r
/**\r
* \r
* @author Fabian Stemmler\r
*/\r
- public void feedSignals(int startingBit, Bit... newValues) {\r
+ public void feedSignals(int startingBit, Bit... newValues)\r
+ {\r
+ if (!open)\r
+ throw new RuntimeException("Attempted to write to closed WireArrayEnd.");\r
Simulation.TIMELINE.addEvent((e) -> setValues(startingBit, newValues), travelTime);\r
}\r
\r
- private void setValues(int startingBit, Bit... newValues) {\r
+ private void setValues(int startingBit, Bit... newValues)\r
+ {\r
int exclLastIndex = startingBit + newValues.length;\r
if (length < exclLastIndex)\r
throw new ArrayIndexOutOfBoundsException(\r
- String.format("Attempted to input bits from index %o to %o when there are only %o wires.", startingBit,\r
+ String.format("Attempted to input bits from index %d to %d when there are only %d wires.", startingBit,\r
exclLastIndex - 1, length));\r
- if (!Arrays.equals(inputValues, startingBit, exclLastIndex, newValues, 0, newValues.length)) {\r
+ if (!Arrays.equals(inputValues, startingBit, exclLastIndex, newValues, 0, newValues.length))\r
+ {\r
System.arraycopy(newValues, 0, inputValues, startingBit, newValues.length);\r
owner.recalculate();\r
}\r
}\r
\r
/**\r
- * Returns a copy (safe to modify) of the values the {@link WireArrayInput} is currently feeding into the associated\r
+ * Returns a copy (safe to modify) of the values the {@link WireArrayEnd} is currently feeding into the associated\r
* {@link WireArray}.\r
*/\r
- public Bit[] getValues() {\r
+ public Bit[] getValues()\r
+ {\r
return inputValues.clone();\r
}\r
\r
/**\r
- * {@link WireArrayInput} now feeds Z into the associated {@link WireArray}.\r
+ * {@link WireArrayEnd} now feeds Z into the associated {@link WireArray}.\r
*/\r
- public void clearSignals() {\r
+ public void clearSignals()\r
+ {\r
feedSignals(Bit.Z.makeArray(length));\r
}\r
\r
- public Bit[] wireValuesExcludingMe() {\r
+ public Bit[] wireValuesExcludingMe()\r
+ {\r
Bit[] bits = Bit.Z.makeArray(length);\r
- for (WireArrayInput wai : inputs) {\r
+ for (WireArrayEnd wai : inputs)\r
+ {\r
if (wai == this)\r
continue;\r
Util.combineInto(bits, wai.getValues());\r
return bits;\r
}\r
\r
+ public Bit getWireValue()\r
+ {\r
+ return owner.getValue();\r
+ }\r
+\r
+ public Bit[] getWireValues()\r
+ {\r
+ return owner.getValues();\r
+ }\r
+\r
@Override\r
- public String toString() {\r
+ public String toString()\r
+ {\r
return Arrays.toString(inputValues);\r
}\r
+\r
+ @Override\r
+ public void close()\r
+ {\r
+ inputs.remove(this);\r
+ open = false;\r
+ }\r
}\r
\r
@Override\r
- public String toString() {\r
+ public String toString()\r
+ {\r
return String.format("wire 0x%08x value: %s inputs: %s", hashCode(), Arrays.toString(values), inputs);\r
}\r
\r
- public static WireArrayInput[] extractInputs(WireArray[] w) {\r
- WireArrayInput[] inputs = new WireArrayInput[w.length];\r
+ public static WireArrayEnd[] extractInputs(WireArray[] w)\r
+ {\r
+ WireArrayEnd[] inputs = new WireArrayEnd[w.length];\r
for (int i = 0; i < w.length; i++)\r
inputs[i] = w[i].createInput();\r
return inputs;\r
projects / Mograsim.git / blobdiff