Simplify simplify()
Simplify simplify()

Using overloading in symplify() will generate a lot of
functions very similars, so it is better to use a generic
approach with a big switch.

8l/scc,k0gaMSX/kcc,k0gaMSX/scc,k0gaMSX/scc,k0gaMSX/scc,k0gaMSX/kcc,8l/scc,8l/scc