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Subject: Re: How to do my perft faster without 2 exe files and without doing movei

Author: Uri Blass

Date: 14:49:59 12/25/02

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On December 25, 2002 at 17:19:30, Jeremiah Penery wrote:

>On December 25, 2002 at 15:37:04, Dave Gomboc wrote:
>
>>On December 25, 2002 at 12:27:47, Jeremiah Penery wrote:
>>
>>>On December 25, 2002 at 11:18:54, Uri Blass wrote:
>>>
>>>>I guess that releasing 2 exe file when one file is not supposed to be used for
>>>>playing is the most simple solution (using #define game c when c is from a text
>>>>file is better but I do not know if it is possible).
>>>>
>>>>Uri
>>>
>>>#define shouldn't work in that way, because it is only used in the compiler
>>>preprocessor
>>>
>>>I think the easiest way would be to just copy your functions (gen, makemove,
>>>undomove - whichever calculates the stuff that perft doesn't need) and remove
>>>the extra stuff.  So you have gen(), perft_gen(), makemove(), perft_makemove(),
>>>etc.  Then when you do perft, just call the appropriate one.
>>
>>Ugh.  Uri's learning to program, don't teach him cut-and-paste!  It's the
>>easiest method, and also the worst. :-(
>>
>>Dave
>
>Well, he wants the same move generation functions, minus some move ordering
>calculations.  He doesn't want to use 'if' clauses to do it, because they add
>instructions (supposedly slowing the program down).  How else would you suggest
>to do it simply, other than cut/paste?  Note that his current solution (separate
>exe files, one for games and one for perft) is cut-and-paste of the entire
>program, not just a couple functions. :)
>
>But, now that I think about it, Uri really should try just using simple 'if'
>clauses.  The branch predictor should be almost perfectly accurate there,
>meaning that there will be negligible speed loss due to extra comparisons.

I think that the simplest solution is to release 2 exe files.
In order to release 2 exe files I do not need to copy and paste and
I only need to change one number in the code(changing one number means compiler
warnings but I do not care about the warnings for the perft function).

Uri



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