  We describe in some detail the present features of an automatic loop
calculation program as well as the integration techniques that go into it. The
program, called XLOOPS 1.0, allows one to calculate massive one- and two-loop
Feynman diagrams in the Standard Model including their tensor structure. UV
divergences in UV divergent integrals are explicitly computed in dimensional
regularization. One-loop integrals are calculated analytically in d \neq 4
dimensions whereas two-loop integrals are reduced to two-fold integral
representations which the program evaluates numerically. We discuss Higgs decay
at the two-loop level as a first application of the novel integration
techniques that are incorporated into XLOOPS.
