Let me repeat: at the moment V8 works on x86-64 just fine, both Linux builds of Chromium and node.js on various 64bit OSes are using it without any issues.
Vyacheslav Egorov On Sat, Apr 27, 2013 at 5:29 PM, Jeffrey Chimene <[email protected]> wrote: > On 4/27/2013 8:17 AM, Vyacheslav Egorov wrote: > > Amount of bits is not an issue here at all, for example V8 already runs on > x86-64 just fine. > > I should have been clearer. I'm referring to a thread from 2009 > > https://groups.google.com/forum/#!searchin/v8-dev/ia64/v8-dev/GuP1ZlPVIpE/uUUNjmXCJ-wJ > > Making V8 work on 64-bits is much much bigger than changing some types > around and changing the scons. It probably deserves some fairly big > design discussions, and I would guess it would take at least a few > months, and it will be hard not to fracture the code a bunch, with > separate code for 32/64 bit (GC, object layout, etc). > > > and in reply > > I'm certainly not expecting that type changes will magically make this > code 64-bit clean. If that were true, it would've been done already. > > If it would be better, I can do these changes out of tree and come back > with things when I have them working. My question from the previous email > is whether or not generic changes would be accepted into the tree or not - > if the answer is no, that's fine. > > > Despite confusingly similar names ia32 and IA64 (Itanium) are *very* > different architectures. > > Agreed. The mode on the IA64 that executes 32 bit instructions isn't > available on VMS > > > > I'd say generating efficient code for IA64 is much harder because > compiler has to carefully schedule instructions in instruction bundles > (IA64 is VLIW) to saturate execution units and avoid dreadful stalls. > > Agreed. That may be why IA64 hasn't been produced. OTOH. it may be that > the V8 code isn't 64-bit clean. > > > [though I heard that newest Itanium micro-architecture actually is more > forgiving to poor scheduling and is capable of a good built-in out-of-order > execution, but I am not closely following this things so I might be wrong] > > > > > > Vyacheslav Egorov > > > On Sat, Apr 27, 2013 at 4:50 AM, <[email protected]> wrote: > >> Hi Folks, >> >> I'd like to spearhead a port to IA64 on OpenVMS, which does not support >> IA32 subset. Am I correct that this is a deal breaker in that true 64 bit >> is a major initiative? >> -- >> -- >> v8-dev mailing list >> [email protected] >> http://groups.google.com/group/v8-dev >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > -- > v8-dev mailing list > [email protected] > http://groups.google.com/group/v8-dev > --- > You received this message because you are subscribed to a topic in the > Google Groups "v8-dev" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/v8-dev/HnPDu-HygB4/unsubscribe?hl=en. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- > -- > v8-dev mailing list > [email protected] > http://groups.google.com/group/v8-dev > --- > You received this message because you are subscribed to the Google Groups > "v8-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
