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====64 bit mode====
====64 bit mode====
The operation in 64 bit mode is the same, execpt that RIP is loaded from LSTAR, or CSTAR of in IA32-e submode (A.K.A. compatibility mode).
The operation in 64 bit mode is the same, except that RIP is loaded from LSTAR, or CSTAR of in IA32-e submode (A.K.A. compatibility mode).


==Compatibility across Intel and AMD==
==Compatibility across Intel and AMD==