On Tue, May 19, 2020 at 7:29 AM Jorrit Jongma via rsync <
rsync@lists.samba.org> wrote:
> I've read up some more on the subject, and it seems the proper way to do
> this with GCC is g++ and target attributes. I've refactored the patch that
> way, and it indeed uses SSSE3 automatically on
I haven't found a way to control GCC's target selector at runtime
(though in theory it could be possible), so switching between specific
optimizations (SSE2 vs SSSE3) may prove difficult or require
additional duplication of code. Bypassing the optimizations completely
in an all-or-nothing way
would it perhaps make sense to have a "--disable-sse2/3" commandline
switch in rsync, too - at least for some timeframe until this is
considered "rock solid" ?
i dislike having automatic cpu feature switching code in a tool which
needs to be reliable for me, this new optimization may have issues
I've read up some more on the subject, and it seems the proper way to
do this with GCC is g++ and target attributes. I've refactored the
patch that way, and it indeed uses SSSE3 automatically on supporting
CPUs, regardless of the build host, so this should be ideal both for
home builders and
