/// <summary>
/// Emits the given code.
/// </summary>
/// <param name="opCode">The op code.</param>
/// <param name="dest">The destination operand.</param>
/// <param name="src">The source operand.</param>
internal void Emit(LegacyOpCode opCode, Operand dest, Operand src)
{
// Write the opcode
codeStream.Write(opCode.Code, 0, opCode.Code.Length);
Debug.Assert(!(dest == null && src == null));
// Write the mod R/M byte
byte?modRM = CalculateModRM(opCode.RegField, dest, src);
if (modRM != null)
{
codeStream.WriteByte(modRM.Value);
}
// Add immediate bytes
if (dest.IsConstant)
{
WriteImmediate(dest);
}
else if (dest.IsSymbol)
{
WriteDisplacement(dest);
}
else if (src?.IsResolvedConstant == true)
{
WriteImmediate(src);
}
else if (src != null && (src.IsSymbol || src.IsStaticField))
{
WriteDisplacement(src);
}
}
/// <summary>
/// Emits the given code.
/// </summary>
/// <param name="opCode">The op code.</param>
/// <param name="dest">The dest.</param>
/// <param name="src">The source.</param>
/// <param name="third">The third.</param>
internal void Emit(LegacyOpCode opCode, Operand dest, Operand src, Operand third)
{
// Write the opcode
codeStream.Write(opCode.Code, 0, opCode.Code.Length);
Debug.Assert(!(dest == null && src == null));
// Write the mod R/M byte
byte?modRM = CalculateModRM(opCode.RegField, dest, src);
if (modRM != null)
{
codeStream.WriteByte(modRM.Value);
}
// Add immediate bytes
if (third?.IsConstant == true)
{
WriteImmediate(third);
}
}
/// <summary>
/// Emits the specified op code.
/// </summary>
/// <param name="opCode">The op code.</param>
/// <param name="dest">The destination operand.</param>
internal void Emit(LegacyOpCode opCode, Operand dest)
{
// Write the opcode
codeStream.Write(opCode.Code, 0, opCode.Code.Length);
// Write the mod R/M byte
byte?modRM = CalculateModRM(opCode.RegField, dest, null);
if (modRM != null)
{
codeStream.WriteByte(modRM.Value);
}
// Add immediate bytes
if (dest.IsConstant)
{
WriteImmediate(dest);
}
else if (dest.IsSymbol)
{
WriteDisplacement(dest);
}
}
/// <summary>
/// Emits the specified op code.
/// </summary>
/// <param name="opCode">The op code.</param>
internal void Emit(LegacyOpCode opCode)
{
// Write the opcode
codeStream.Write(opCode.Code, 0, opCode.Code.Length);
}
