From 755dd287af38d41b225e5976466111bc69249edb Mon Sep 17 00:00:00 2001
From: Daniel Kirschten <daniel.kirschten@gmx.de>
Date: Sat, 10 Aug 2019 14:56:19 +0200
Subject: [PATCH] Implemented GUIAm2910RegCntr

---
 .../components/am2910/GUIAm2910RegCntr.java   | 83 +++++++++++++++++++
 .../model/examples/GUIComponentTestbench.java |  4 +-
 2 files changed, 85 insertions(+), 2 deletions(-)
 create mode 100644 net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2910/GUIAm2910RegCntr.java

diff --git a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2910/GUIAm2910RegCntr.java b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2910/GUIAm2910RegCntr.java
new file mode 100644
index 00000000..ec900c08
--- /dev/null
+++ b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/am2900/components/am2910/GUIAm2910RegCntr.java
@@ -0,0 +1,83 @@
+package net.mograsim.logic.model.am2900.components.am2910;
+
+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.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 GUIAm2910RegCntr extends SimpleRectangularHardcodedGUIComponent
+{
+	public GUIAm2910RegCntr(ViewModelModifiable model, String name)
+	{
+		super(model, name, "Register/\nCounter");
+		setSize(40, 40);
+		addPin(new Pin(this, "D", 12, 20, 0), Usage.INPUT, Position.BOTTOM);
+		addPin(new Pin(this, "_RLD", 1, 0, 5), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "RWE", 1, 0, 20), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "RDEC", 1, 0, 30), Usage.INPUT, Position.RIGHT);
+		addPin(new Pin(this, "C", 1, 40, 20), Usage.INPUT, Position.LEFT);
+		addPin(new Pin(this, "Y", 12, 20, 40), Usage.OUTPUT, Position.TOP);
+	}
+
+	@Override
+	protected Object recalculate(Object lastState, Map<String, ReadEnd> readEnds, Map<String, ReadWriteEnd> readWriteEnds)
+	{
+		Bit[] QC = (Bit[]) lastState;
+		if (QC == null)
+		{
+			QC = new Bit[13];
+			Arrays.fill(QC, U);
+		}
+
+		ReadEnd D = readEnds.get("D");
+		ReadEnd _RLD = readEnds.get("_RLD");
+		ReadEnd RWE = readEnds.get("RWE");
+		ReadEnd RDEC = readEnds.get("RDEC");
+		ReadEnd C = readEnds.get("C");
+		ReadWriteEnd Y = readWriteEnds.get("Y");
+
+		Bit oldCVal = QC[12];
+		Bit CVal = C.getValue();
+
+		if (oldCVal == ZERO && CVal == ONE && _RLD.getValue() == ZERO && RWE.getValue() == ONE)
+		{
+			if (RDEC.getValue() == ONE)
+			{
+				Bit carry = Bit.ZERO;
+				// TODO maybe invert loop direction
+				for (int i = 12; i >= 0; i--)
+				{
+					Bit a = QC[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;
+					}
+					QC[i] = z;
+				}
+			} else
+				System.arraycopy(D.getValues().getBits(), 0, QC, 0, 12);
+		}
+		QC[12] = CVal;
+		Y.feedSignals(Arrays.copyOfRange(QC, 0, 12));
+
+		return QC;
+	}
+}
\ No newline at end of file
diff --git a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/examples/GUIComponentTestbench.java b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/examples/GUIComponentTestbench.java
index 90ceb285..b57522d2 100644
--- a/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/examples/GUIComponentTestbench.java
+++ b/net.mograsim.logic.model.am2900/src/net/mograsim/logic/model/examples/GUIComponentTestbench.java
@@ -5,7 +5,7 @@ import java.util.Comparator;
 import java.util.List;
 
 import net.mograsim.logic.model.SimpleLogicUIStandalone;
-import net.mograsim.logic.model.am2900.components.am2910.GUIAm2910InstrPLA;
+import net.mograsim.logic.model.am2900.components.am2910.GUIAm2910RegCntr;
 import net.mograsim.logic.model.model.ViewModelModifiable;
 import net.mograsim.logic.model.model.components.GUIComponent;
 import net.mograsim.logic.model.model.components.atomic.GUIBitDisplay;
@@ -26,7 +26,7 @@ public class GUIComponentTestbench
 	public static void createTestbench(ViewModelModifiable model)
 	{
 //		GUIComponent comp = IndirectGUIComponentCreator.createComponent(model, "GUIAm2901", "Am2901");
-		GUIComponent comp = new GUIAm2910InstrPLA(model, "Am2910");
+		GUIComponent comp = new GUIAm2910RegCntr(model, "RegCntr");
 
 		// guess which pins are outputs and which are inputs
 		// TODO this code exists four times... but it seems too "hacky" to put it in a helper class
-- 
2.17.1