Updated instruction handlers to use Type and StructuredOperands instead of Mnemonic and Operands

X86Disassembler/X86/Operands/FPURegisterOperand.cs

@@ -0,0 +1,32 @@
+namespace X86Disassembler.X86.Operands;
+
+/// <summary>
+/// Represents an FPU register operand (ST(0) to ST(7))
+/// </summary>
+public class FPURegisterOperand : Operand
+{
+    /// <summary>
+    /// Gets the FPU register index (0-7)
+    /// </summary>
+    public FpuRegisterIndex RegisterIndex { get; }
+
+    /// <summary>
+    /// Initializes a new instance of the FPURegisterOperand class
+    /// </summary>
+    /// <param name="registerIndex">The FPU register index (RegisterIndex.A to RegisterIndex.Di)</param>
+    public FPURegisterOperand(FpuRegisterIndex registerIndex)
+    {
+        RegisterIndex = registerIndex;
+    }
+
+    /// <summary>
+    /// Returns a string representation of the FPU register operand
+    /// </summary>
+    /// <returns>A string representation of the FPU register operand</returns>
+    public override string ToString()
+    {
+        // Convert RegisterIndex to a numerical index (0-7)
+        int index = (int)RegisterIndex;
+        return $"ST({index})";
+    }
+}