From bfbec8d525963b6985acdda36ba35f304fe91bb4 Mon Sep 17 00:00:00 2001
From: darkress <darkress@darrkess.xyz>
Date: Mon, 29 May 2023 15:39:04 +0200
Subject: [PATCH] XorlwInstruction (#1)

Co-authored-by: Darkress <30271678+DarkressX@users.noreply.github.com>
Reviewed-on: https://git.darkress.xyz/darkress/pic16f84-sim/pulls/1
---
 de/darkress/pic16f84sim/Main.java             | 23 +++++--------------
 de/darkress/pic16f84sim/commands/Xorlw.java   | 22 ++++++++++++++++++
 .../pic16f84sim/decoder/CommandDecoder.java   |  3 +--
 .../microcontroller/ProgramCounter.java       |  5 ++++
 4 files changed, 34 insertions(+), 19 deletions(-)
 create mode 100644 de/darkress/pic16f84sim/commands/Xorlw.java

diff --git a/de/darkress/pic16f84sim/Main.java b/de/darkress/pic16f84sim/Main.java
index 03cb934..4b64698 100644
--- a/de/darkress/pic16f84sim/Main.java
+++ b/de/darkress/pic16f84sim/Main.java
@@ -1,29 +1,18 @@
 package de.darkress.pic16f84sim;
 
-import de.darkress.pic16f84sim.microcontroller.Stack;
+import de.darkress.pic16f84sim.commands.Command;
+import de.darkress.pic16f84sim.decoder.CommandDecoder;
+import de.darkress.pic16f84sim.microcontroller.Memory;
+import java.util.ArrayList;
 
 class Main
 {
     public static void main(String[] args) {
-        /*
         ArrayList<Command> program = new ArrayList<>();
-        int input1 = 0x3EFF;
+        Memory.workingRegister = 0xAA;
+        int input1 = 0x3AFF;
         program.add(CommandDecoder.decode(input1));
         program.get(0).execute();
-        */
-
-
-        for(int i = 0; i < 8; i++)
-        {
-            Stack.push(i);
-        }
-
-        for(int i = 0; i < 16; i++)
-        {
-            System.out.println(Stack.peek());
-            Stack.pop();
-        }
-
 
     }
 }
\ No newline at end of file
diff --git a/de/darkress/pic16f84sim/commands/Xorlw.java b/de/darkress/pic16f84sim/commands/Xorlw.java
new file mode 100644
index 0000000..a3e21af
--- /dev/null
+++ b/de/darkress/pic16f84sim/commands/Xorlw.java
@@ -0,0 +1,22 @@
+package de.darkress.pic16f84sim.commands;
+
+import de.darkress.pic16f84sim.microcontroller.Memory;
+
+public class Xorlw extends CommandUtils implements Command
+{
+    private final int literal;
+
+    public Xorlw(int input)
+    {
+        literal = input & 0x00FF;
+    }
+    @Override
+    public void execute()
+    {
+        int result = literal ^ Memory.workingRegister;
+
+        checkZeroBit(result);
+
+        Memory.workingRegister = result % 256;
+    }
+}
diff --git a/de/darkress/pic16f84sim/decoder/CommandDecoder.java b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
index 9c6d79a..00f0f9e 100644
--- a/de/darkress/pic16f84sim/decoder/CommandDecoder.java
+++ b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
@@ -55,8 +55,7 @@ public class CommandDecoder
             case 0x3800:
                 return new Iorlw(input);
             case 0x3A00:
-                //xorlw();
-                break;
+                return new Xorlw(input);
         }
 
         switch(input & 0x3F80)
diff --git a/de/darkress/pic16f84sim/microcontroller/ProgramCounter.java b/de/darkress/pic16f84sim/microcontroller/ProgramCounter.java
index 7085d95..196d02e 100644
--- a/de/darkress/pic16f84sim/microcontroller/ProgramCounter.java
+++ b/de/darkress/pic16f84sim/microcontroller/ProgramCounter.java
@@ -15,4 +15,9 @@ public class ProgramCounter
     {
         ProgramCounter.PC = PC;
     }
+
+    public static void incPC()
+    {
+        PC++;
+    }
 }