No. FAI is supposed to implement an extrapolated version of mankind's combined values, not search for an objectively defined moral code to implement.
Also: Eliezer has argued that even from it's programmers' perspective, some elements of a FAI's moral code (Coherent Extrapolated Volition) will probably look deeply immoral. (But will actually be OK.)
Why does the moral anti-realist think "an extrapolated version of mankind's combined values" exists or is capable of being created? For the moral realists, the answer is easy - the existence of objective moral facts shows that, in principle, some moral system that all humans could endorse could be discovered/articulated.
As an aside, CEV is a proposed method for finding what an FAI would implement. I think that one could think FAI is possible even if CEV were the wrong track for finding what FAI should do. In should, CEV is not necessarily part of the definition of Friendly.
From the last thread:
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