22.02.2017, 17:41, "Atul Sowani" <sow...@gmail.com>: > 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 <annu...@yandex.ru> wrote: > >> 22.02.2017, 13:15, "Atul Sowani" <sow...@gmail.com>: >>> 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 >>> webkit-dev@lists.webkit.org >>> https://lists.webkit.org/mailman/listinfo/webkit-dev >> >> -- >> Regards, >> Konstantin > , > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev -- Regards, Konstantin _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-dev
