Hi all, We at Igalia use the x86 32bit port for testing, prototyping, etc, in our 32bit work. We recently added a JSC EWS x86 instance. That being said only the LLInt tier is working properly at the moment, and if the maintenance of the JIT code is a big burden we think it makes sense to remove it.
This already happened during the weekend, so I guess this can count as an after the fact tacit agreement. In the future we'd appreciate if we could have at least a full week day (including Europe) to discuss these kinds of changes though. Cheers, Xan (on behalf of Igalia's compilers team) On Sat, Sep 14, 2019 at 9:32 PM Yusuke Suzuki <[email protected]> wrote: > Thanks! > > I think we are not testing x86 JIT configuration, and nobody is seriously > using it (Default build option for c86 is no JIT). Removed :D > > [1]: https://trac.webkit.org/changeset/249830/webkit > > Best regards, > Yusuke Suzuki > > On Sep 13, 2019, at 15:08, Geoffrey Garen <[email protected]> wrote: > > No objection. > > Geoff > > On Sep 13, 2019, at 1:39 PM, Yusuke Suzuki <[email protected]> wrote: > > > Hello all, > > > Now, Xcode no longer has ability to build 32bit binary. > > Fedora starts dropping x86 32bit kernel shipping. > > Our x86/x86_64 JIT requires SSE2, so such CPUs can use JIT if they want by > switching x86 to x86_64. > > And these CPUs are modern enough to run CLoop at high speed. > > > x86 32bit JIT backend is very complicated and is being a major maintenance > burden. > > This is due to very few # of registers. Which scatters a lot of isX86 / > CPU(X86) in Baseline, DFG, and Yarr. > > I’m now planning to optimize some part of Yarr, but x86 YarrJIT is being a > major barrier of such cleanups / optimizations. > > > So, I would like to propose dropping X86 32bit JIT support. > > > -Yusuke > > _______________________________________________ > > webkit-dev mailing list > > [email protected] > > https://lists.webkit.org/mailman/listinfo/webkit-dev > > > _______________________________________________ > webkit-dev mailing list > [email protected] > https://lists.webkit.org/mailman/listinfo/webkit-dev >
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