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Code Issues Releases Activity

Simplified AndImmToRm8Handler for better maintainability and consistency

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bird_egop 2025-04-13 23:16:34 +03:00
parent cf1e1acf71
commit f19f2254fe
1 changed files with 20 additions and 20 deletions
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40
X86Disassembler/X86/Handlers/And/AndImmToRm8Handler.cs
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@ -54,40 +54,40 @@ public class AndImmToRm8Handler : InstructionHandler
// Set the mnemonic
instruction.Mnemonic = "and";
int position = Decoder.GetPosition();
// Read the ModR/M byte
var (mod, reg, rm, memOperand) = ModRMDecoder.ReadModRM();
// Read immediate value
// Get the position after decoding the ModR/M byte
int position = Decoder.GetPosition();
// Check if we have enough bytes for the immediate value
if (position >= Length)
{
// Incomplete instruction
if (mod == 3)
{
string rmRegName = ModRMDecoder.GetRegisterName(rm, 8);
instruction.Operands = $"{rmRegName}, ??";
}
else
{
instruction.Operands = $"byte ptr {memOperand}, ??";
}
return true;
return false; // Not enough bytes for the immediate value
}
// Read the immediate value
byte imm8 = Decoder.ReadByte();
// Set operands
if (mod == 3)
// Format the destination operand based on addressing mode
string destOperand;
if (mod == 3) // Register addressing mode
{
string rmRegName = ModRMDecoder.GetRegisterName(rm, 8);
instruction.Operands = $"{rmRegName}, 0x{imm8:X2}";
// Get 8-bit register name
destOperand = ModRMDecoder.GetRegisterName(rm, 8);
}
else
else // Memory addressing mode
{
instruction.Operands = $"byte ptr {memOperand}, 0x{imm8:X2}";
// Add byte ptr prefix for memory operands
destOperand = $"byte ptr {memOperand}";
}
// Format the immediate value
string immStr = $"0x{imm8:X2}";
// Set the operands
instruction.Operands = $"{destOperand}, {immStr}";
return true;
}
}