/// <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);
 }