[fpc-devel] x86_64 SHA1 implementation (J. Gareth Moreton)

[J. Gareth Moreton]

I will admit that part of me likes to program my own implementations in 
assembly language if just for the practice, especially learning where 
latency and stalls happen.  The problem with most of the examples given 
in this chain is that they use a 'high-level' assembly language with 
macros and variables among other things, or use the SHA-specific 
opcodes.  The mORMot 2 example looks good for the SHA-specific opcodes 
though and I'll give that one a try.  It's under a MPL/GPL/LGPL licence 
so I think that's compatible for us.

Granted, at the very least, the "basic" x86_64 port of the i386 code 
works fine, so we always have this one to fall back on.

Kit

On 17/09/2023 08:37, Florian Klämpfl via fpc-devel wrote:
>
>> Am 17.09.2023 um 08:45 schrieb Arnaud Bouchez via fpc-devel <fpc-devel at lists.freepascal.org>:
>>
>> 
>> There is a working SHA-1 and SHA-256 implementation using x86_64 asm and also SHA-NI in mORMot 2.
>>
>> Numbers are very high, e.g. 2GB/s on my Core i5 13500.
>>
>> Since there is no SHA opcode in FPC asm yet (neither in Delphi), I am using hardcoded "db" arrays for SHA-NI instructions.
> Trunk should have them.
>
>> See https://github.com/synopse/mORMot2/blob/4c59b3c212c5efd2f440c1d7f61504ca832a5931/src/crypt/mormot.crypt.core.asmx64.inc#L1154 for the SHA-NI asm.
>>
>> Arnaud
>>
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