[RC5] New version of SGP 3-pipe Pentium 4 core

Slawek sgp at telsatgp.com.pl
Wed Sep 24 11:43:53 EDT 2003


Hello,



I ported back some of my optimisations from ALFA version of my SSE2
core to ALU core and it's now about 5% faster than SGP 3-pipe 1.0.
Source is available on bugzilla entry:
http://n0cgi.distributed.net/bugs/show_bug.cgi?id=3398

The core is optimised for two newest Pentium 4 processor cores:
- D1 - identified as stepping 9
- M0 - stepping 5
but it should get some speed-up on older ones as well.


Does somebody have some detailed information about differences
beetween Pentium 4 cores? I've found docs about errors of older
cores on Intel's website. Intel issued microcode workarounds for
most of the problems (applied by BIOS updates).

I can see some of those workarounds does slow down my cores
on older Pentium 4's. It'll be really good if someone knew where
can I find documentation about what in fact is slowed down by those
workarounds.



-- 
Slawek Piotrowski




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