FutureFantasyDesign opened this issue on Mar 12, 2007 · 31 posts
pjz99 posted Tue, 13 March 2007 at 1:56 AM
RAX, RBX etc. registers are part of the X64 register set:
http://msdn.microsoft.com/msdnmag/issues/06/05/x64/default.aspx
If you're running a "32-bit" app that makes use of the R* registers but isn't truly 64-bit, the fault is with the developer, not the OS - why design your app to be partially 64-bit aware but still leave most of the code compiled in 32-bit instructions? At that point why not make it fully 64-bit? 