Refactor SUB handlers

X86Disassembler/X86/Handlers/Sub/SubAlImm8Handler.cs

@@ -0,0 +1,54 @@
+namespace X86Disassembler.X86.Handlers.Sub;
+
+/// <summary>
+/// Handler for SUB AL, imm8 instruction (0x2C)
+/// </summary>
+public class SubAlImm8Handler : InstructionHandler
+{
+    /// <summary>
+    /// Initializes a new instance of the SubAlImm8Handler class
+    /// </summary>
+    /// <param name="codeBuffer">The buffer containing the code to decode</param>
+    /// <param name="decoder">The instruction decoder that owns this handler</param>
+    /// <param name="length">The length of the buffer</param>
+    public SubAlImm8Handler(byte[] codeBuffer, InstructionDecoder decoder, int length)
+        : base(codeBuffer, decoder, length)
+    {
+    }
+
+    /// <summary>
+    /// Checks if this handler can decode the given opcode
+    /// </summary>
+    /// <param name="opcode">The opcode to check</param>
+    /// <returns>True if this handler can decode the opcode</returns>
+    public override bool CanHandle(byte opcode)
+    {
+        return opcode == 0x2C;
+    }
+
+    /// <summary>
+    /// Decodes a SUB AL, imm8 instruction
+    /// </summary>
+    /// <param name="opcode">The opcode of the instruction</param>
+    /// <param name="instruction">The instruction object to populate</param>
+    /// <returns>True if the instruction was successfully decoded</returns>
+    public override bool Decode(byte opcode, Instruction instruction)
+    {
+        int position = Decoder.GetPosition();
+
+        if (position >= Length)
+        {
+            return false;
+        }
+
+        // Read the immediate byte
+        byte imm8 = CodeBuffer[position++];
+        Decoder.SetPosition(position);
+
+        // Set the instruction information
+        instruction.Mnemonic = "sub";
+        instruction.Operands = $"al, 0x{imm8:X2}";
+
+        return true;
+    }
+}