[PATCH] D102839: [RISCV][Clang] Add -mno-div option to disable hardware int division

[ksyx via Phabricator via cfe-commits]

ksyx added a comment.

In D102839#2784297 <https://reviews.llvm.org/D102839#2784297>, @luismarques wrote:

> In D102839#2784275 <https://reviews.llvm.org/D102839#2784275>, @ksyx wrote:
>
>> Thanks for mentioning that! Now, I changed the effect of `no-div` option into choosing a proper extension and implemented the `Zmmul` subextension. Is this solution acceptable or are there anything need further changes?
>
> It seems like the community is quickly converging on just using the ISA string with Zmmul, and not using no-div. While being compatible with the GNU tools is nice, if they are planning on dropping support for no-div soonish then we probably shouldn't add support for it. IMO, Zmmul should be a separate patch and presumably (at the moment) be gated by `-menable-experimental-extensions`.

Thanks for the news and I think having experimental-zmmul a separate patch is a good idea. But which implementation of `no-div` is better, the one that chooses extension between M and zmmul or the one that simply being an attribute like Diff 3, or are there any other suggestions?


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https://reviews.llvm.org/D102839