Implemented 0x4XKK and 0x5XY0

include/instruction_handler.h

@@ -39,6 +39,16 @@ private:
      * Handles Chip8 instruction 0x3000
      */
     static void handle3000(Chip8&, Instruction);
+
+    /**
+     * Handles Chip8 instruction 0x4000
+     */
+    static void handle4000(Chip8&, Instruction);
+
+    /**
+     * Handles Chip8 instruction 0x5000
+     */
+    static void handle5000(Chip8&, Instruction);
 public:
     InstructionHandler();
 

src/instruction_handler.cpp

@@ -6,6 +6,7 @@ InstructionHandler::InstructionHandler() {
     this->handlers[0x1000] = handle1000;
     this->handlers[0x2000] = handle2000;
     this->handlers[0x3000] = handle3000;
+    this->handlers[0x4000] = handle4000;
 }
 
 /**
@@ -81,4 +82,30 @@ void InstructionHandler::handle3000(Chip8& chip8, Instruction instruction) {
     if (chip8.getRegister(instruction.x()) == instruction.kk()) {
         chip8.setProgramCounter(chip8.getProgramCounter() + 2);
     }
+}
+
+/**
+ * Handles the 0x4XKK Chip8 instruction which is used to skip the next instruction if V[x] != kk.
+ * This will compare V[x] to kk and increases the program counter by 2 if they are not equal.
+ *
+ * @param chip8 The Chip8 instance
+ * @param instruction The Instruction instance
+ */
+void InstructionHandler::handle4000(Chip8& chip8, Instruction instruction) {
+    if (chip8.getRegister(instruction.x()) != instruction.kk()) {
+        chip8.setProgramCounter(chip8.getProgramCounter() + 2);
+    }
+}
+
+/**
+ * Handles the 0x5XY0 Chip8 instruction which is used to skip the next instruction if V[x] == V[y].
+ * This will compare V[x] to V[y] and increases the program counter by 2 if they are equal.
+ *
+ * @param chip8 The Chip8 instance
+ * @param instruction The Instruction instance
+ */
+void InstructionHandler::handle5000(Chip8& chip8, Instruction instruction) {
+    if (chip8.getRegister(instruction.x()) == chip8.getRegister(instruction.y())) {
+        chip8.setProgramCounter(chip8.getProgramCounter() + 2);
+    }
 }