System.Xml.Xsl.IlGen.GenerateHelper.CallArithmeticOp C# (CSharp) Method

        public void CallArithmeticOp(QilNodeType opType, XmlTypeCode code)
        {
            MethodInfo meth = null;

            switch (code)
            {
                case XmlTypeCode.Int:
                case XmlTypeCode.Integer:
                case XmlTypeCode.Double:
                case XmlTypeCode.Float:
                    switch (opType)
                    {
                        case QilNodeType.Add: Emit(OpCodes.Add); break;
                        case QilNodeType.Subtract: Emit(OpCodes.Sub); break;
                        case QilNodeType.Multiply: Emit(OpCodes.Mul); break;
                        case QilNodeType.Divide: Emit(OpCodes.Div); break;
                        case QilNodeType.Modulo: Emit(OpCodes.Rem); break;
                        case QilNodeType.Negate: Emit(OpCodes.Neg); break;
                        default: Debug.Assert(false, opType + " must be an arithmetic operation."); break;
                    }
                    break;

                case XmlTypeCode.Decimal:
                    switch (opType)
                    {
                        case QilNodeType.Add: meth = XmlILMethods.DecAdd; break;
                        case QilNodeType.Subtract: meth = XmlILMethods.DecSub; break;
                        case QilNodeType.Multiply: meth = XmlILMethods.DecMul; break;
                        case QilNodeType.Divide: meth = XmlILMethods.DecDiv; break;
                        case QilNodeType.Modulo: meth = XmlILMethods.DecRem; break;
                        case QilNodeType.Negate: meth = XmlILMethods.DecNeg; break;
                        default: Debug.Assert(false, opType + " must be an arithmetic operation."); break;
                    }

                    Call(meth);
                    break;

                default:
                    Debug.Assert(false, "The " + opType + " arithmetic operation cannot be performed on values of type " + code + ".");
                    break;
            }
        }