On 05.09.2024 00:55, Andrew Cooper wrote: > It has existed in x86 CPUs since 2008, so we're only 16 years late adding > support. With all the other scafolding in place, implement arch_hweightl() > for x86. > > The only complication is that the call to arch_generic_hweightl() is behind > the compilers back. Address this by writing it in ASM and ensure that it > preserves all registers. > > Copy the code generation from generic_hweightl(). It's not a complicated > algorithm, and is easy to regenerate if needs be, but cover it with the same > unit tests as test_generic_hweightl() just for piece of mind. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Acked-by: Jan Beulich <jbeul...@suse.com>
