/// <summary>
/// Emits the opcode of the instruction.
/// </summary>
/// <param name="writer">The <see cref="BinaryWriter"/> to which the encoded instruction is written.</param>
void EmitOpcode(BinaryWriter writer)
{
// We OR the least siginificant 3 bits of the opcode REG with the last byte of the opcode, if necessary.
if (OpcodeReg > 0)
{
var actualOpcode = (byte[])Opcode.Clone();
actualOpcode[actualOpcode.Length - 1] |= (byte)(OpcodeReg & 0x7);
writer.Write(actualOpcode);
}
else
{
writer.Write(Opcode);
}
}