[PATCH v2 1/2] eal: provide leading and trailing zero bit count abstraction

[Tyler Retzlaff]

On Thu, Nov 24, 2022 at 11:17:23AM +0100, Morten Brørup wrote:
> > From: Tyler Retzlaff [mailto:roretzla at linux.microsoft.com]
> > Sent: Thursday, 24 November 2022 00.43
> > 
> > Provide an abstraction for leading and trailing zero bit counting
> > functions to hide compiler specific intrinsics and builtins.
> > 
> > Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
> > ---
> 

let me unpack what is being asked for here.

> Related functions already exist in lib/eal/include/rte_common.h.

i don't understand. are you saying these inline functions duplicate
existing bit counting functionality? if so i'll relocate any you
identify.

> 
> If some functions are missing, it would be good to add them.

the change here is to address a specific family of functions that are
impeding portability of the rte_common.h header and nothing more.

i'm open to having a separate mail thread discussing what other
functions we might want and whether to relocate code out of rte_common.h
since that is likely to be a drawn out discussion it shouldn't be a
blocking dependency of this series.

> 
> Also, it makes sense moving them out of rte_common.h.

thanks!