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Removed two-byte instruction handling from FloatingPointHandler. Simplified the code by removing the TwoByteInstructions dictionary and related methods since we now have dedicated handlers for specific instructions.

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bird_egop 2025-04-12 21:29:43 +03:00
parent 6ed6a7bd00
commit a6b6cc1149
1 changed files with 0 additions and 30 deletions
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30
X86Disassembler/X86/Handlers/FloatingPointHandler.cs
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@ -8,16 +8,12 @@ public class FloatingPointHandler : InstructionHandler
// Floating-point instruction mnemonics based on opcode and ModR/M reg field // Floating-point instruction mnemonics based on opcode and ModR/M reg field
private static readonly string[][] FpuMnemonics = new string[8][]; private static readonly string[][] FpuMnemonics = new string[8][];
// Two-byte floating-point instructions
private static readonly Dictionary<ushort, string> TwoByteInstructions = new Dictionary<ushort, string>();
/// <summary> /// <summary>
/// Static constructor to initialize the FPU mnemonic tables /// Static constructor to initialize the FPU mnemonic tables
/// </summary> /// </summary>
static FloatingPointHandler() static FloatingPointHandler()
{ {
InitializeFpuMnemonics(); InitializeFpuMnemonics();
InitializeTwoByteInstructions();
} }
/// <summary> /// <summary>
@ -109,17 +105,6 @@ public class FloatingPointHandler : InstructionHandler
FpuMnemonics[7][7] = "fistp"; FpuMnemonics[7][7] = "fistp";
} }
/// <summary>
/// Initializes the two-byte floating-point instructions
/// </summary>
private static void InitializeTwoByteInstructions()
{
// We no longer need to handle FNSTSW AX (DF E0) here since we have a dedicated FnstswHandler
// that is registered before this handler in the InstructionHandlerFactory
// Add other two-byte instructions as needed
}
/// <summary> /// <summary>
/// Initializes a new instance of the FloatingPointHandler class /// Initializes a new instance of the FloatingPointHandler class
/// </summary> /// </summary>
@ -156,21 +141,6 @@ public class FloatingPointHandler : InstructionHandler
return false; return false;
} }
// Check for two-byte instructions
if (position < Length)
{
// Create a two-byte opcode by combining the primary opcode with the next byte
ushort twoByteOpcode = (ushort)((opcode << 8) | CodeBuffer[position]);
// Check if this is a known two-byte instruction
if (TwoByteInstructions.TryGetValue(twoByteOpcode, out string? mnemonic) && mnemonic != null)
{
instruction.Mnemonic = mnemonic;
Decoder.SetPosition(position + 1); // Skip the second byte
return true;
}
}
// The opcode index in our tables (0-7 for D8-DF) // The opcode index in our tables (0-7 for D8-DF)
int opcodeIndex = opcode - 0xD8; int opcodeIndex = opcode - 0xD8;