Am Mittwoch, 12. Dezember 2012, 02:40:04 schrieb Frank Steinmetzger: > On Tue, Dec 11, 2012 at 09:20:55PM +0100, Florian Philipp wrote: > > > * From my observations, the benefit of 64 bit over 32 is much smaller > > > for an> > > > > Atom than it is for my Core2. Am I right to assume thus that the Atom > > > architecture doesn’t have much to offer to 64 bit (such as extra > > > registers)? I’m not talking about memory here, since it’s limited to > > > 2 GB in any case.> > > It has the same set of registers as your Core2. > > Incidentally, when I initially set up the netbook, the output of > gcc -march=native -E -v - </dev/null 2>&1 | sed -n 's/.* -v - //p' > (which floated around the ML in the past) implied core2, IIRC. > > > It's just that the Atom micro-architecture is terrible with regard to > > 64bit. That's just about the only reason that x32 was invented (and > > now that I've said it, I'm just waiting for the flamewar about it). > > Terrible in what way? Inadequate memory throughput? I didn't know x32, > but from what I've read in the last few minutes it sounds intriguing.
terrible at dealing with 64bit numbers. Terrible at everything pretty much. -- #163933
