Re: [PATCH v3 0/7] MR6752: include: More fixes to build libc++.

[Jacek Caban (＠jacek)]

Jacek Caban (@jacek) commented about include/winnt.h:
> #endif
>  }
>
> +
> +#ifdef __x86_64__
> As far as I can see, `UnsignedMultiply128` should be available on ARM64 too, my comment was only about `_umul128`.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6752#note_87315