Metalibm takes a set of parameters as an input and produces corresponding C code, the function to be implemented is also passed as a parameter. Thus, Metalibm can be considered as a blackbox code generator: it never knows beforehand which mathematical function it is implementing. It generates all the functions within the same scheme: argument reduction (domain splitting), polynomial approximation and reconstruction. Metalibm selects the computation parameters (e.g. precision, polynomial degrees) so, that the required final accuracy of the result is verified.