From 9a21d9256fb9b0cc563a6e0d66fd6457535e9ba5 Mon Sep 17 00:00:00 2001
From: darkress <github@darkress.xyz>
Date: Fri, 2 Jun 2023 23:50:34 +0200
Subject: [PATCH] implemented Clrf Instruction

---
 de/darkress/pic16f84sim/Main.java             |  4 +--
 de/darkress/pic16f84sim/commands/Clrf.java    | 27 +++++++++++++++++++
 .../pic16f84sim/decoder/CommandDecoder.java   |  3 +--
 3 files changed, 30 insertions(+), 4 deletions(-)
 create mode 100644 de/darkress/pic16f84sim/commands/Clrf.java

diff --git a/de/darkress/pic16f84sim/Main.java b/de/darkress/pic16f84sim/Main.java
index 75b3207..dc0c85b 100644
--- a/de/darkress/pic16f84sim/Main.java
+++ b/de/darkress/pic16f84sim/Main.java
@@ -12,8 +12,8 @@ class Main
     public static void main(String[] args) {
 
         ArrayList<Command> program = new ArrayList<>();
-        Memory.workingRegister = 0x10;
-        program.add(CommandDecoder.decode(0x123)); //Write 0x11 to W
+        Memory.setRegister(0x14, 0xFF);
+        program.add(CommandDecoder.decode(0x0194));
         for(int i = 0; i < program.size(); i++)
         {
             program.get(ProgramCounter.getPc()).execute();
diff --git a/de/darkress/pic16f84sim/commands/Clrf.java b/de/darkress/pic16f84sim/commands/Clrf.java
new file mode 100644
index 0000000..6a809f6
--- /dev/null
+++ b/de/darkress/pic16f84sim/commands/Clrf.java
@@ -0,0 +1,27 @@
+package de.darkress.pic16f84sim.commands;
+
+import de.darkress.pic16f84sim.microcontroller.Memory;
+import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
+
+public class Clrf extends FileRegisterCommandUtils implements Command
+{
+    private final int address;
+    private final boolean destinationBit;
+
+    public Clrf(int input)
+    {
+        address = input & 0x007F;
+        destinationBit = true;
+    }
+
+    @Override
+    public void execute()
+    {
+        final int result = 0;
+
+        checkZeroBit(result);
+
+        writeToDestination(destinationBit, address, result);
+        ProgramCounter.incPC();
+    }
+}
diff --git a/de/darkress/pic16f84sim/decoder/CommandDecoder.java b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
index fee3db5..f480a7d 100644
--- a/de/darkress/pic16f84sim/decoder/CommandDecoder.java
+++ b/de/darkress/pic16f84sim/decoder/CommandDecoder.java
@@ -54,8 +54,7 @@ public class CommandDecoder
         switch(input & 0x3F80)
         {
             case 0x180:
-                //clrf();
-                break;
+                return new Clrf(input);
             case 0x100:
                 return new Clrw();
             case 0x80: