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Subject: Re: Tweaked Crafty 18.01 now running at 10,000 RPM

Author: Brian Kostick

Date: 03:28:46 01/11/01

Go up one level in this thread


On January 11, 2001 at 03:13:28, Dann Corbit wrote:

>On January 11, 2001 at 01:19:22, Eugene Nalimov wrote:
>
>>On January 10, 2001 at 16:25:59, Dann Corbit wrote:
>>
>>>On January 10, 2001 at 16:13:06, Robert Hyatt wrote:
>>>
>>>>On January 10, 2001 at 15:37:40, Dann Corbit wrote:
>>>>
>>>>>Here she be:
>>>>>ftp://cap.connx.com/pub/chess-engines/new-approach/CRAFTY1.EXE
>>>>>
>>>>>SMP Version here:
>>>>>ftp://cap.connx.com/pub/chess-engines/new-approach/CRAFTYSMP.EXE
>>>>
>>>>OK... I give up... what is "new approach"?
>>>>
>>>>:)
>>>
>>>Not much to it.
>>>
>>>I change a few compiler settings, and use the Intel C++ 5.0 compiler do most of
>>>the work.  She's a real honey.
>>>
>>>I let the compiler agressively inline and target P6 and above chips.  I also
>>>change the function calling convention and a few other odds and ends (you've
>>>seen my dirty #include trick, for example).
>>>
>>>As far as making a fast binary, the Intel C++ compiler is the best there is.
>>>
>>>If someone else wants to try it, you should buy both versions 4.5 and version 5,
>>>since there are some files that won't compile because it is an incredibly picky
>>>compiler.  I use this procedure:
>>>Compile with Intel C++ 5.0
>>>(for all modules left not compiled):
>>>Compile with Intel C++ 4.5
>>>(for all modules left not compiled):
>>>Compile with Microsoft C++ 6.0 (with processor pack installed).
>>>
>>>Then, for obvious gaffes, I repair them one at a time and repeat the process.
>>>That way, I have something that runs right off the bat, and eventually, a real
>>>bolt of lightning.
>>
>>So, generally you are saying "Intel compiler does not work".
>
>The compiler is usually right when it complains about something (but refusing to
>create an object is a bit extreme).
>
>>AFAIK, main objective for Intel compiler is to produce good results on SPEC
>>benchmarks. What will happen with real-world code does not matter.
>
>The binaries it creates are usually quite a bit faster than Microsoft.  And I
>can set the optimization to the most aggressive levels and it still runs.
>
>I am satisfied with the quality of the Intel compilers.  However, their
>technical support is unfathomably lame, doubly so considering what you pay for
>it.

Sorry if I come to the thread at the wrong point. However, I am having trouble
running link-supplied Crafty1.exe on Winboard 4.2.0beta. Maybe using that
version of winboard is my fault but wcrafty-17.14.exe seems to run there ok. The
simple message Winboard displays is "Illgal move 'e4' (rejected by second chess
program)" where e4 move is not static. I tried various combination of
wcrafty-17.14.exe and crafty1.exe. Whenever Crafty1.exe is used, No Joy. No luck
as a winboard engine under CM8K either.  This post is informational, not a
concern for me, I just like to tinker/compare.



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