>>> On 31.05.19 at 21:23, <[email protected]> wrote: > On 31/05/2019 02:52, Jan Beulich wrote: >> According to Linux commit 0136611c62 ("optimize hweight64 for x86_64") >> this is a further improvement over the variant using only bitwise >> operations. It's also a slight further code size reduction. >> >> Suggested-by: Andrew Cooper <[email protected]> >> Signed-off-by: Jan Beulich <[email protected]> > > This should also include ARM64, which also unconditionally selects > HAS_FAST_MULTIPLY in Linux.
I've very intentionally split the Arm change from the x86 one: Looking at the generated code I'm unconvinced this is a win there, and hence I'd prefer if someone could measure this. It is for this reason that patch 3 was actually sent as RFC. > As for the x86 side of things, Acked-by: Andrew Cooper > <[email protected]> Thanks. Jan _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
