Re: [PATCH] net/crc: reduce usage of static arrays in net_crc_sse.c

[Thomas Monjalon <thomas@monjalon.net>]

29/09/2025 18:28, Shreesh Adiga:
> On Wed, Sep 24, 2025 at 8:28 PM Thomas Monjalon <thomas@monjalon.net> wrote:
> 
> > Hello,
> >
> > 16/07/2025 12:34, Shreesh Adiga:
> > > Replace the clearing of lower 32 bits of XMM register with blend of
> > > zero register.
> > > Replace the clearing of upper 64 bits of XMM register with
> > _mm_move_epi64.
> > > Clang is able to optimize away the AND + memory operand with the
> > > above sequence, however GCC is still emitting the code for AND with
> > > memory operands which is being explicitly eliminated here.
> > >
> > > Additionally replace the 48 byte crc_xmm_shift_tab with the contents of
> > > shf_table which is 32 bytes, achieving the same functionality.
> > >
> > > Signed-off-by: Shreesh Adiga <16567adigashreesh@gmail.com>
> >
> > Sorry I'm not following.
> > Please could you start with defining the goal of this patch?
> > Is it a code simplification or a performance optimization?
> 
> It is intended to be a minor performance optimization.

Please could you give some performance numbers in the commit log?