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List:       freebsd-arch
Subject:    Re: crc32 table
From:       "Poul-Henning Kamp" <phk () phk ! freebsd ! dk>
Date:       2010-05-25 16:37:12
Message-ID: 72207.1274805432 () critter ! freebsd ! dk
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In message <06D5F9F6F655AD4C92E28B662F7F853E021D4D9D@seaxch09.desktop.isilon.co
m>, "Matthew Fleming" writes:

>Is there an interest in another crc32 implementation for the kernel =
>which uses this polynomial and uses the SSE 4.2 instruction when =
>available?  (This support would require kib's FPU patch).

It would be a better idea to add a kernel facility to build a
CRC table to a given polynomial.  The code to do this is very
compact and would take up less space than N CRC tables which are
likely not used in most running kernels.

Poul-Henning

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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