[cfe-dev] [llvm-dev] Speculative FP operation.

[Florian Hahn via cfe-dev]

> On Jan 12, 2022, at 16:23, John Brawn <John.Brawn at arm.com> wrote:
> 
> I'm currently working on AArch64 strict fp support (which is what's needed to enable -ftrapping-math).
> There's a few patches currently in review:
> https://reviews.llvm.org/D114946 <https://reviews.llvm.org/D114946>
> https://reviews.llvm.org/D115352 <https://reviews.llvm.org/D115352> (though I need to rebase this)
> https://reviews.llvm.org/D115620 <https://reviews.llvm.org/D115620> (needs some extra work to enable a currently xfailed test)
> 
> And I'm working on some other patches:
> Miscellaneous fixes for vector instruction lowering
> Model FPCR use in AArch64 instructions
> Fixes related to GlobalISel (not strictly needed as GlobalISel falls back to default isel when it can't handle things)
> 
> Once all of the above is done I think that I can then mark AArch64 as supporting strict fp in clang, so that -ftrapping-math isn't ignored.

That’s great news, thanks for pushing on this!


Cheers,
Florian

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