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Re: 64-bit

From: Nathan Kidd <nathan-svn_at_spicycrypto.ca>
Date: 2005-12-19 22:12:53 CET

Stefan Küng wrote:
>> - No assembler modules are engaged upon initial 0.9.8 release."
>
> I've read that too. But with a good optimizing compiler, there won't be
> much of a speed reduction without assembler.

For normal code this is true but the particular nature of OpenSSL (well
defined algorithms looped many *many* times) is such that carefully
tuned asm does give several times faster code than the best optimizing
compilers. Andy Polyakov has done quite a bit of work on this, taking
into consideration CPU architecture details, etc. (An example:
http://www.mail-archive.com/openssl-dev@openssl.org/msg18415.html)

-Nathan

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Received on Mon Dec 19 22:18:34 2005

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