An ABI for amd64 was consciously developed independently by the gcc developers and Microsoft. Microsoft did "the obvious thing" and extended __fastcall to defin

An ABI for amd64 was consciously developed independently by the gcc developers and Microsoft. Microsoft did "the obvious thing" and extended __fastcall to define their ABI. Here are links about this topic: > http://stackoverflow.com/a/35619528/497193 http://stackoverflow.com/a/35619528/497193 > http://stackoverflow.com/a/4438515/497193 http://stackoverflow.com/a/4438515/497193 > http://stackoverflow.com/a/35621290/497193 http://stackoverflow.com/a/35621290/497193