Digest for comp.lang.c++@googlegroups.com - 5 updates in 2 topics

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• faster "CRC"- / "FNV"-hashing - 4 Updates
• How to get mantissa of long double? - 1 Update

faster "CRC"- / "FNV"-hashing

RadicalRabbit@theburrow.co.uk: Oct 12 09:06AM On Mon, 11 Oct 2021 16:55:59 GMT   >> It was easy to beat a compiler before 10 years, but today not anymore. >> And in five years it will be almost impossible. >Look, humans write compilers, start at that :P   Humans wrote AlphaZero. Good luck beating it at chess however.

Branimir Maksimovic <branimir.maksimovic@icloud.com>: Oct 12 11:01AM >>> And in five years it will be almost impossible. >>Look, humans write compilers, start at that :P   > Humans wrote AlphaZero. Good luck beating it at chess however.   AlpaZero is nothing special, just better determination of position quality function :P Compiler is mutch larger byte :P   --   7-77-777 Evil Sinner! with software, you repeat same experiment, expecting different results...

RadicalRabbit@theburrow.co.uk: Oct 12 02:49PM On Tue, 12 Oct 2021 11:01:26 GMT   >> Humans wrote AlphaZero. Good luck beating it at chess however.   >AlpaZero is nothing special, just better determination of position >quality function :P   Its not what it does that matters, its how it does it.   >Compiler is mutch larger byte :P   Not really. Both are complex problems.

"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>: Oct 12 01:47PM -0700 On 10/10/2021 3:51 PM, Scott Lurndal wrote: >> interested because of my experimental HMAC cipher. I have a C version:   > https://en.wikipedia.org/wiki/Intel_SHA_extensions > https://developer.arm.com/documentation/100076/0100/a64-instruction-set-reference/a64-cryptographic-algorithms/a64-cryptographic-instructions?lang=en   Nice! I failed to notice SHA-384. I like that hash for some reasons. However, I did notice SHA3, which means they should have it.

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How to get mantissa of long double?

Vir Campestris <vir.campestris@invalid.invalid>: Oct 12 09:23PM +0100 On 09/10/2021 09:23, David Brown wrote: > first samples were made. The story of the IBM PC shows how technical > brilliance is not enough to succeed - the worst cpu architecture around, > combined with the worst OS ever hacked together, ended up dominant.   Very nicely put.   Of course one reason for that is the success of the 8080, and its successors the 8085 and Zilog's Z80 (which had an even less regular instruction set).   AIUI Intel had a world leader on their hands, and felt that having some sort of compatibility in the next generation was important.   While the 6800 had some success (and the 6809 was my favourite 8-bit CPU) it was nowhere near that of the 8080.   Andy

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