On Tue, Sep 18, 2018 at 06:36:21AM -0600, Jan Beulich wrote: > This allows to fold 6 instructions into a single one, reducing code size > quite a bit, especially when not considering the fallback functions > (which won't ever need to be brought into iCache or their mappings into > iTLB on systems supporting BMI2). > > Make use of gcc's new V operand modifier, even if that results in a > slightly odd dependency in the sources (but I also didn't want to > introduce yet another manifest constant). This assumes that backports of > support for this relatively new modifier have only been done to tool > chains with not too old a binutils (gas) version. If this turns out to > be a false assumption, we'll have to add HAVE_AS_BMI2 as a qualifier. > > Signed-off-by: Jan Beulich <[email protected]>
I'm afraid this patch series smells like "micro optimisation gone too far" to me. :-/ Wei. _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
