Search found 6 matches

by rjones
Wed Apr 01, 2009 12:59 pm
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

Re: DTC Tablebases (or generator) and probing code - Available?

Thanks for the extra details h.g.

Regards,
Richard.
by rjones
Tue Mar 31, 2009 10:00 pm
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

Re: DTC Tablebases (or generator) and probing code - Available?

Hi h.g, Is your ubuntu machine running 32 bit or 64 bit? I'm fairly sure this line alone with cause major problems on 64 bit: tb = (char*)((int)p+4095&~4095); /* align with cash line */ as the cache alignment code will definitely be truncating p in some situations under linux where an int will b...
by rjones
Tue Mar 31, 2009 2:59 pm
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

Re: DTC Tablebases (or generator) and probing code - Available?

From what I could see, the 32/64 bit issues could have lead to scribbling on memory in some situations, so the crash may well occur in different places depending on what optimisation (or other compiler) flags etc are on (I built with debugging and could see that the tb pointer had become corrupted i...
by rjones
Tue Mar 31, 2009 1:17 pm
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

Re: DTC Tablebases (or generator) and probing code - Available?

There appear to be a few 64 bit issues related to the use of ints and pointer arithmatic used in some parts of the code. The code worked fine first time for me on my macbook (64 bit intel), but I suspect the apple modified gcc may be using 64 bit values for ints. The code did not work on 64 bit linu...
by rjones
Sun Mar 29, 2009 11:43 pm
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

Re: DTC Tablebases (or generator) and probing code - Available?

Hi, Thanks, I would certainly like to see the code (I'll PM you my contact details). Unfortunately for my current uses the pawn endings are probably the most important to me. I'm trying to determine moves which although slower in DTM may still be considered "good" from a human perspective ...
by rjones
Sat Mar 21, 2009 8:42 am
Forum: Endgame Tablebases
Topic: DTC Tablebases (or generator) and probing code - Available?
Replies: 15
Views: 13831

DTC Tablebases (or generator) and probing code - Available?

I've been hunting around for DTC tablebases but haven't been able to find any publicly accessible data. There is at least one place where you can probe the tables via a web interface but I'd like to have access to the raw data and probing code. Does anyone know if there are any freely distributable ...