[PATCH] net/crc: add 4x folding loop for aarch64 NEON implementation

[Stephen Hemminger]

On Mon,  6 Jul 2026 14:54:14 +0530
Shreesh Adiga <16567adigashreesh at gmail.com> wrote:

> Add a 64-byte loop that maintains 4 fold registers and processes
> 64 bytes at a time. The 4x fold registers is then reduced to 16 byte
> single fold, similar to x86 SSE implementation. This technique is
> described in the paper by Intel:
> "Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction"
> 
> This results in roughly 2x performance improvement due to better ILP
> for large input sizes like 1024 observed on Cortex-X925.
> 
> Also removed the special handling of len 16 to 31 similar to x86 SSE
> implementation.
> 
> Signed-off-by: Shreesh Adiga <16567adigashreesh at gmail.com>
> ---

Applied to next-net