Sure, thanks @Konstantin. So I will first attempt having working JIT on ppc64le. Your comments definitely helped in deciding the direction for porting. Thanks! :)
On Wed, Feb 22, 2017 at 8:28 PM, Konstantin Tokarev <[email protected]> wrote: > > > 22.02.2017, 17:41, "Atul Sowani" <[email protected]>: > > So, essentially, some tweaking in the code of LLInt/interpreter _is_ > required when porting it to the new platform. Is my understanding correct? > > Yes. In order to port LLInt you should implement offlineasm backend. See > for example arm.rb, arm64.rb, mips.rb in Source/JavaScriptCore/offlineasm/. > You may also need arch-specific adjustements in > Source/JavaScriptCore/llint, though it's better to minimize their number. > > My point was that you don't have to port LLInt before you have working > JIT. AFAIU main purpose of architecture-specific LLInt implementation is to > provide interpreter with the same calling convention as JIT, not to make > interpreter faster on its own. > > See also https://trac.webkit.org/wiki/JavaScriptCore > > > On Wed, Feb 22, 2017 at 4:11 PM, Konstantin Tokarev <[email protected]> > wrote: > > > >> 22.02.2017, 13:15, "Atul Sowani" <[email protected]>: > >>> Hi, > >>> > >>> This is not specific to any particular branch/version of WebKit. I was > browsing the code with ppc64le porting in mind. By default JIT is not > available on ppc64le, so the CLoop code is used instead. > >>> > >>> I see there is low level interpreter code in > >>> qtwebkit/Source/JavaScriptCore/llint > directory and inside qtwebkit/Source/JavaScriptCore/interpreter directory > (AbstractPC, CallFrame etc.). I am wondering if one needs to touch this > code as well to make it work correctly on ppc64le. > >> > >> Porting JIT to new platfrom does not require porting LLInt, it can work > without interpreter tier. However, it is a good idea to port LLInt after > you have JIT in place, to improve overall quality. > >> > >>> > >>> Any comments/suggestions? > >>> > >>> Thanks, > >>> Atul. > >>> , > >>> > >>> _______________________________________________ > >>> webkit-dev mailing list > >>> [email protected] > >>> https://lists.webkit.org/mailman/listinfo/webkit-dev > >> > >> -- > >> Regards, > >> Konstantin > > , > > > > _______________________________________________ > > webkit-dev mailing list > > [email protected] > > https://lists.webkit.org/mailman/listinfo/webkit-dev > > > -- > Regards, > Konstantin >
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