SSE4.2 CRC32 question

2013-03-27 Thread Alexey Suslikov
Hi tech@. Can OpenBSD use SSE4.2 CRC32 (found on Core i7) to speedup TCP/IP checksum calculations? Cheers, Alexey

Re: SSE4.2 CRC32 question

2013-03-27 Thread Christian Weisgerber
Alexey Suslikov alexey.susli...@gmail.com wrote: Can OpenBSD use SSE4.2 CRC32 (found on Core i7) to speedup TCP/IP checksum calculations? TCP, UDP, and IPv4 checksums are simple sums and don't involve CRCs. Also, the SSE4.2 CRC32 instruction uses the Castagnoli polynomial, which is different