[LLVMdev] A7 processor support?

Alex Rosenberg alexr at leftfield.org
Tue Sep 10 18:57:09 PDT 2013

Thanks for the update. I look forward to the patches. :-)

Sent from my iPad

On Sep 10, 2013, at 6:00 PM, Chris Lattner <clattner at apple.com> wrote:

> On Sep 10, 2013, at 4:17 PM, Alex Rosenberg <alexr at leftfield.org> wrote:
>> I know it's quick to ask, but when might support for the new Apple A7 processor appear in tree?
>> Is the 64-bit architecture the same as ARMv8, or will we have a much bigger set of changes to contend with?
> Hi Alex,
> A number of you have asked about the 64-bit CPU in the iPhone 5s, and what that means for LLVM.  The iPhone 5s is based on the ARMv8 / Aarch64 instruction set, but the clang compiler in Xcode 5 is based on a custom LLVM Aarch64 backend, not the one currently on llvm.org.
> Apple is committed to contributing its Aarch64 backend to the community (merging it "the right way" with the existing backend), but it was a significant amount of work, and will take at least several months to work out all the details.  I'll keep you posted,
> -Chris

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