Re: [PATCH 0/3] Optimize CRC32C calculation using PCLMULQDQ incrc32c-intel module

[David Miller]

From: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Date: Tue, 25 Sep 2012 14:50:08 -0700

> This patch series optimized CRC32C calculations with PCLMULQDQ
> instruction for crc32c-intel module.  It speeds up the original
> implementation by 1.6x for 1K buffer and by 3x for buffer 4k or
> more.  The tcrypt module was enhanced for doing speed test
> on crc32c calculations.
> 
> Signed-off-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>

Great work.

I intend to do something nearly identical on sparc64 since we have
similar instructions in the form of "xmulx" and "xmulxhi" which return
the lower and upper 64-bits (respectively) of a XOR multiply.

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