[webkit-dev] Bring back ARMv6 support to JSC

[Olmstead, Don]

We have plans to add a JSC-Only windows bot in the very near future. Would that have any bearing on the state of JIT in Windows?

-----Original Message-----
From: webkit-dev [mailto:webkit-dev-bounces at lists.webkit.org] On Behalf Of Filip Pizlo
Sent: Tuesday, September 5, 2017 8:37 AM
To: Adrian Perez de Castro <aperez at igalia.com>
Cc: webkit-dev at lists.webkit.org
Subject: Re: [webkit-dev] Bring back ARMv6 support to JSC

There isn’t anyone maintaining the 32-not JIT ports to the level of quality we have in our 64-not ports. Making 32-bit use the 64-bit cloop would be a quality progression for actual users of 32-bit. 

-Filip

> On Sep 5, 2017, at 8:02 AM, Adrian Perez de Castro <aperez at igalia.com> wrote:
> 
>> On Tue, 5 Sep 2017 16:38:09 +0200, Osztrogonác Csaba <oszi at inf.u-szeged.hu> wrote:
>> 
>> [...]
>> 
>> Maybe it will be hard to say good bye to 32-bit architecutres for 
>> many people, but please, it's 2017 now, the first ARMv8 SoC is out 4 
>> years ago, the first AMD64 CPU is out 14 years ago.
> 
> While it's true that amd64/x86_64 has been around long enough to not 
> have to care (much) about its 32-bit counterpart; the same cannot be said about ARM.
> It would be great to be able to say that 32-bit ARM is well dead, but 
> we are not there yet.
> 
> If we take x86_64 as an example, it has been “only” 10 years since the 
> last new 32-bit CPU was announced and until 3-4 years ago it wasn't 
> uncommon to see plently of people running 32-bit userlands. If things 
> unroll in a similar way in the ARM arena, I would expect good 32-bit 
> ARM support being relevant at least for another 3-4 years before the need starts to fade away.
> 
> If something, I think it may make more sense to remove 32-bit x86 
> support, and have the 32-bit ARM support around for some more time.
> 
> Cheers,
> 
> 
> --
> Adrián 🎩
> 
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