assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
}
+ @Test
+ void fusionTest()
+ {
+ t.reset();
+ Wire a = new Wire(t, 3, 1), b = new Wire(t, 2, 1), c = new Wire(t, 3, 1), out = new Wire(t, 8, 1);
+ Wire.fuse(a, out, 0, 0, a.length);
+ Wire.fuse(b, out, 0, a.length, b.length);
+ Wire.fuse(c, out, 0, a.length + b.length, c.length);
+ ReadWriteEnd rA = a.createReadWriteEnd();
+ rA.feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
+ ReadWriteEnd rB = b.createReadWriteEnd();
+ rB.feedSignals(Bit.ONE, Bit.ZERO);
+ ReadWriteEnd rC = c.createReadWriteEnd();
+ rC.feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
+ t.executeAll();
+ assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
+ out.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
+ t.executeAll();
+ assertBitArrayEquals(rA.getValues(), Bit.X, Bit.X, Bit.X);
+ assertBitArrayEquals(rB.getValues(), Bit.X, Bit.X);
+ assertBitArrayEquals(rC.getValues(), Bit.X, Bit.X, Bit.X);
+ rA.clearSignals();
+ rB.clearSignals();
+ rC.clearSignals();
+ t.executeAll();
+ assertBitArrayEquals(rA.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE);
+ assertBitArrayEquals(rB.getValues(), Bit.ZERO, Bit.ONE);
+ assertBitArrayEquals(rC.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO);
+ }
+
@Test
void triStateBufferTest()
{
timeline.addEvent(e -> setValues(startingBit, bitVector), travelTime);
}
- private void setValues(int startingBit, BitVector newValues)
+ /**
+ * Sets the values that are being fed into the {@link Wire}. The preferred way of setting {@link ReadWriteEnd} values is via
+ * feedValues(...) with a delay.
+ */
+ void setValues(int startingBit, BitVector newValues)
{
// index check covered in equals
if (!inputValues.equalsWithOffset(newValues, startingBit))
}
}
- private void setValues(BitVector newValues)
+ /**
+ * Sets the values that are being fed into the {@link Wire}. The preferred way of setting {@link ReadWriteEnd} values is via
+ * feedValues(...) with a delay.
+ */
+ void setValues(BitVector newValues)
{
if (inputValues.equals(newValues))
return;
inputs[i] = w[i].createReadWriteEnd();
return inputs;
}
+
+ /**
+ * @formatter:off
+ * Fuses the selected bits of two wires together. If the bits change in one Wire, the other is changed accordingly immediately.
+ * Warning: The bits are permanently fused together.
+ * @formatter:on
+ * @param a The {@link Wire} to be (partially) fused with b
+ * @param b The {@link Wire} to be (partially) fused with a
+ * @param fromA The first bit of {@link Wire} a to be fused
+ * @param fromB The first bit of {@link Wire} b to be fused
+ * @param length The amount of bits to fuse
+ */
+ public static void fuse(Wire a, Wire b, int fromA, int fromB, int length)
+ {
+ ReadWriteEnd rA = a.createReadWriteEnd(), rB = b.createReadWriteEnd();
+ rA.setValues(BitVector.of(Bit.Z, a.length));
+ rB.setValues(BitVector.of(Bit.Z, b.length));
+ rA.registerObserver(new Fusion(rB, fromA, fromB, length));
+ rB.registerObserver(new Fusion(rA, fromB, fromA, length));
+ }
+
+ /**
+ * @formatter:off
+ * Fuses the selected bits of two wires together. If the bits change in one Wire, the other is changed accordingly immediately.
+ * Warning: The bits are permanently fused together.
+ * @formatter:on
+ * @param a The {@link Wire} to be fused with b
+ * @param b The {@link Wire} to be fused with a
+ */
+ public static void fuse(Wire a, Wire b)
+ {
+ fuse(a, b, 0, 0, a.length);
+ }
+
+ private static class Fusion implements LogicObserver
+ {
+ private ReadWriteEnd target;
+ int fromSource, fromTarget, length;
+
+ public Fusion(ReadWriteEnd target, int fromSource, int fromTarget, int length)
+ {
+ this.target = target;
+ this.fromSource = fromSource;
+ this.fromTarget = fromTarget;
+ this.length = length;
+ }
+
+ @Override
+ public void update(LogicObservable initiator)
+ {
+ ReadWriteEnd read = (ReadWriteEnd) initiator;
+ target.setValues(fromTarget, read.wireValuesExcludingMe().subVector(fromSource, fromSource + length));
+ }
+ }
}
\ No newline at end of file