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Code Issues Releases Activity

Reorganize floating point handlers into logical subfolders

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This commit is contained in:
bird_egop
2025-04-17 23:48:09 +03:00
parent 963248dca0
commit 5916d13995
24 changed files with 818 additions and 42 deletions
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85
X86Disassembler/X86/Handlers/FloatingPoint/Comparison/FcomFloat32Handler.cs Normal file
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using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.FloatingPoint.Comparison;
/// <summary>
/// Handler for FCOM float32 instruction (D8 /2)
/// </summary>
public class FcomFloat32Handler : InstructionHandler
{
/// <summary>
/// Initializes a new instance of the FcomFloat32Handler class
/// </summary>
/// <param name="decoder">The instruction decoder that owns this handler</param>
public FcomFloat32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
/// <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)
{
// FCOM is D8 /2
if (opcode != 0xD8) return false;
if (!Decoder.CanReadByte())
{
return false;
}
// Check if the ModR/M byte has reg field = 2
byte modRm = Decoder.PeakByte();
byte reg = (byte)((modRm >> 3) & 0x7);
return reg == 2;
}
/// <summary>
/// Decodes a FCOM float32 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)
{
if (!Decoder.CanReadByte())
{
return false;
}
// Read the ModR/M byte using the specialized FPU method
var (mod, reg, fpuRm, rawOperand) = ModRMDecoder.ReadModRMFpu();
// Set the instruction type
instruction.Type = InstructionType.Fcom;
// For memory operands, set the operand
if (mod != 3) // Memory operand
{
// Set the structured operands - the operand already has the correct size from ReadModRM
instruction.StructuredOperands =
[
rawOperand
];
}
else // Register operand (ST(i))
{
// For register operands, we need to handle the stack registers
var st0Operand = OperandFactory.CreateFPURegisterOperand(FpuRegisterIndex.ST0); // ST(0)
var stiOperand = OperandFactory.CreateFPURegisterOperand(fpuRm); // ST(i)
// Set the structured operands
instruction.StructuredOperands =
[
st0Operand,
stiOperand
];
}
return true;
}
}

85
X86Disassembler/X86/Handlers/FloatingPoint/Comparison/FcomFloat64Handler.cs Normal file
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namespace X86Disassembler.X86.Handlers.FloatingPoint.Comparison;
using X86Disassembler.X86.Operands;
/// <summary>
/// Handler for FCOM float64 instruction (DC /2)
/// </summary>
public class FcomFloat64Handler : InstructionHandler
{
/// <summary>
/// Initializes a new instance of the FcomFloat64Handler class
/// </summary>
/// <param name="decoder">The instruction decoder that owns this handler</param>
public FcomFloat64Handler(InstructionDecoder decoder)
: base(decoder)
{
}
/// <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)
{
// FCOM is DC /2
if (opcode != 0xDC) return false;
if (!Decoder.CanReadByte())
{
return false;
}
// Check if the ModR/M byte has reg field = 2
byte modRm = Decoder.PeakByte();
byte reg = (byte)((modRm >> 3) & 0x7);
return reg == 2;
}
/// <summary>
/// Decodes a FCOM float64 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)
{
if (!Decoder.CanReadByte())
{
return false;
}
// Read the ModR/M byte using the specialized FPU method
var (mod, reg, fpuRm, rawOperand) = ModRMDecoder.ReadModRMFpu();
// Set the instruction type
instruction.Type = InstructionType.Fcom;
// For memory operands, set the operand
if (mod != 3) // Memory operand
{
// Set the structured operands - the operand already has the correct size from ReadModRM
instruction.StructuredOperands =
[
rawOperand
];
}
else // Register operand (ST(i))
{
// For register operands, we need to handle the stack registers
var st0Operand = OperandFactory.CreateFPURegisterOperand(FpuRegisterIndex.ST0); // ST(0)
var stiOperand = OperandFactory.CreateFPURegisterOperand(fpuRm); // ST(i)
// Set the structured operands
instruction.StructuredOperands =
[
st0Operand,
stiOperand
];
}
return true;
}
}

85
X86Disassembler/X86/Handlers/FloatingPoint/Comparison/FcompFloat32Handler.cs Normal file
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using X86Disassembler.X86.Operands;
namespace X86Disassembler.X86.Handlers.FloatingPoint.Comparison;
/// <summary>
/// Handler for FCOMP float32 instruction (D8 /3)
/// </summary>
public class FcompFloat32Handler : InstructionHandler
{
/// <summary>
/// Initializes a new instance of the FcompFloat32Handler class
/// </summary>
/// <param name="decoder">The instruction decoder that owns this handler</param>
public FcompFloat32Handler(InstructionDecoder decoder)
: base(decoder)
{
}
/// <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)
{
// FCOMP is D8 /3
if (opcode != 0xD8) return false;
if (!Decoder.CanReadByte())
{
return false;
}
// Check if the ModR/M byte has reg field = 3
byte modRm = Decoder.PeakByte();
byte reg = (byte)((modRm >> 3) & 0x7);
return reg == 3;
}
/// <summary>
/// Decodes a FCOMP float32 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)
{
if (!Decoder.CanReadByte())
{
return false;
}
// Read the ModR/M byte using the specialized FPU method
var (mod, reg, fpuRm, rawOperand) = ModRMDecoder.ReadModRMFpu();
// Set the instruction type
instruction.Type = InstructionType.Fcomp;
// For memory operands, set the operand
if (mod != 3) // Memory operand
{
// Set the structured operands - the operand already has the correct size from ReadModRM
instruction.StructuredOperands =
[
rawOperand
];
}
else // Register operand (ST(i))
{
// For register operands, we need to handle the stack registers
var st0Operand = OperandFactory.CreateFPURegisterOperand(FpuRegisterIndex.ST0); // ST(0)
var stiOperand = OperandFactory.CreateFPURegisterOperand(fpuRm); // ST(i)
// Set the structured operands
instruction.StructuredOperands =
[
st0Operand,
stiOperand
];
}
return true;
}
}

85
X86Disassembler/X86/Handlers/FloatingPoint/Comparison/FcompFloat64Handler.cs Normal file
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namespace X86Disassembler.X86.Handlers.FloatingPoint.Comparison;
using X86Disassembler.X86.Operands;
/// <summary>
/// Handler for FCOMP float64 instruction (DC /3)
/// </summary>
public class FcompFloat64Handler : InstructionHandler
{
/// <summary>
/// Initializes a new instance of the FcompFloat64Handler class
/// </summary>
/// <param name="decoder">The instruction decoder that owns this handler</param>
public FcompFloat64Handler(InstructionDecoder decoder)
: base(decoder)
{
}
/// <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)
{
// FCOMP is DC /3
if (opcode != 0xDC) return false;
if (!Decoder.CanReadByte())
{
return false;
}
// Check if the ModR/M byte has reg field = 3
byte modRm = Decoder.PeakByte();
byte reg = (byte)((modRm >> 3) & 0x7);
return reg == 3;
}
/// <summary>
/// Decodes a FCOMP float64 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)
{
if (!Decoder.CanReadByte())
{
return false;
}
// Read the ModR/M byte using the specialized FPU method
var (mod, reg, fpuRm, rawOperand) = ModRMDecoder.ReadModRMFpu();
// Set the instruction type
instruction.Type = InstructionType.Fcomp;
// For memory operands, set the operand
if (mod != 3) // Memory operand
{
// Set the structured operands - the operand already has the correct size from ReadModRM
instruction.StructuredOperands =
[
rawOperand
];
}
else // Register operand (ST(i))
{
// For register operands, we need to handle the stack registers
var st0Operand = OperandFactory.CreateFPURegisterOperand(FpuRegisterIndex.ST0); // ST(0)
var stiOperand = OperandFactory.CreateFPURegisterOperand(fpuRm); // ST(i)
// Set the structured operands
instruction.StructuredOperands =
[
st0Operand,
stiOperand
];
}
return true;
}
}