Implemented GUIinc12; fixed GUIAm2910RegCntr

[Mograsim.git] / net.mograsim.logic.model.am2900 / src / net / mograsim / logic / model / am2900 / components / GUIinc12.java

diff --git a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIinc12.java b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIinc12.java
new file mode 100644 (file)
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+++ b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/GUIinc12.java
@@ -0,0 +1,72 @@
+package net.mograsim.logic.model.am2900.components;
+
+import static net.mograsim.logic.core.types.Bit.ONE;
+import static net.mograsim.logic.core.types.Bit.U;
+import static net.mograsim.logic.core.types.Bit.X;
+import static net.mograsim.logic.core.types.Bit.Z;
+import static net.mograsim.logic.core.types.Bit.ZERO;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import net.mograsim.logic.core.types.Bit;
+import net.mograsim.logic.core.wires.Wire.ReadEnd;
+import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
+import net.mograsim.logic.model.model.ViewModelModifiable;
+import net.mograsim.logic.model.model.components.atomic.SimpleRectangularHardcodedGUIComponent;
+import net.mograsim.logic.model.model.wires.Pin;
+import net.mograsim.logic.model.snippets.symbolrenderers.PinNamesSymbolRenderer.PinNamesParams.Position;
+
+public class GUIinc12 extends SimpleRectangularHardcodedGUIComponent
+{
+       public GUIinc12(ViewModelModifiable model, String name)
+       {
+               super(model, name, "Incrementer");
+               setSize(40, 20);
+               addPin(new Pin(this, "A", 12, 20, 20), Usage.INPUT, Position.TOP);
+               addPin(new Pin(this, "CI", 1, 40, 10), Usage.INPUT, Position.LEFT);
+               addPin(new Pin(this, "Y", 12, 20, 0), Usage.OUTPUT, Position.BOTTOM);
+       }
+
+       @Override
+       protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+       {
+               Bit[] ABits = readEnds.get("A").getValues().getBits();
+               Bit CIVal = readEnds.get("CI").getValue();
+               Bit[] YBits = new Bit[12];
+               if (CIVal == X)
+                       Arrays.fill(YBits, X);
+               else if (CIVal == U)
+                       Arrays.fill(YBits, U);
+               else if (CIVal == Z)
+                       Arrays.fill(YBits, X);
+               else if (CIVal == ZERO)
+                       YBits = ABits;
+               else
+               {
+                       Bit carry = Bit.ONE;
+                       // TODO extract to helper. This code almost also exists in GUIAM2910RegCntr.
+                       // TODO maybe invert loop direction
+                       for (int i = 11; i >= 0; i--)
+                       {
+                               Bit a = ABits[i];
+                               Bit z;
+                               if (a.isBinary() && carry.isBinary())
+                               {
+                                       boolean aBool = a == ONE;
+                                       boolean carryBool = carry == ONE;
+                                       z = aBool ^ carryBool ? ONE : ZERO;
+                                       carry = aBool && carryBool ? ONE : ZERO;
+                               } else
+                               {
+                                       carry = carry.join(a);
+                                       z = carry;
+                               }
+                               YBits[i] = z;
+                       }
+               }
+               readWriteEnds.get("Y").feedSignals(YBits);
+               return null;
+       }
+
+}
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