X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=net.mograsim.logic.model.am2900%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fmodel%2Fam2900%2Fcomponents%2FGUIinc12.java;fp=net.mograsim.logic.model.am2900%2Fsrc%2Fnet%2Fmograsim%2Flogic%2Fmodel%2Fam2900%2Fcomponents%2FGUIinc12.java;h=20925444619697d447322cc455d6ccb6e843a280;hb=af730951db57d13d0b25671991f5bac36daabb85;hp=0000000000000000000000000000000000000000;hpb=aeb37a7bcc75c673fd0dd00743cf90227583db18;p=Mograsim.git

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
index 00000000..20925444
--- /dev/null
+++ 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;
+	}
+
+}
\ No newline at end of file