From: Jiong Wang <jiong.w...@netronome.com> Date: Tue, 4 Dec 2018 04:56:29 -0500
> This patch implements interpreting BPF_ALU | BPF_ARSH. Do arithmetic right > shift on low 32-bit sub-register, and zero the high 32 bits. > > Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com> > Signed-off-by: Jiong Wang <jiong.w...@netronome.com> I just want to say that this behavior is interesting because on most cpus that have a 32-bit and 64-bit variant, the 32-bit arithmetic right shift typically sign extends to 64-bit rather than zero extends which is what is being defined here. Well, definitely, sparc64 behaves this way.
