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159 commits

Author SHA1 Message Date
Marco Costalba
c729e4e1ab Forgot two conversion to new POPCNT interface 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-21 16:50:19 +02:00
Marco Costalba
e7d3a006cd Enable POPCNT at runtime 
Runtime detect POPCNT instruction support and
use it.

Also if POPCNT is not supported we don't add _any_ overhead so
that we don't lose any speed in standard case.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-21 16:41:31 +02:00
Marco Costalba
3376c68f4b Introduce bitcount.h 
It will be used for POPCNT intrinsics.

For now no bianry and functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-21 16:19:20 +02:00
Marco Costalba
4f7ec4128f Retire count_1s_8bit() 
Use the plain array lookup in the only place where it
is used. This remove an unecessary indirection and better
clarifies what code does.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-19 15:49:54 +01:00
Marco Costalba
1e4472b651 Small code style triviality in evaluation 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-19 15:41:45 +01:00
Marco Costalba
da579e46b7 Remove hardcode default values of UCI variables from evaluation 
This is the same change we have already done in search.cpp,
this time for evaluation.cpp

If a variable will be populated reading an UCI option
then do not hard code its default values.

This avoids misleadings when reading the sources.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-19 15:35:12 +01:00
Marco Costalba
f83b899f39 Cache king shelter info in pawns structure 
It does not change often and is not so fast
to calculate.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-17 10:23:24 +01:00
Marco Costalba
980124c609 Fix some Intel compilers warnings 
Also a compile fix due to Makefile missing new
application.cpp file.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-09 12:09:25 +02:00
Marco Costalba
5c81602d14 Update copyright year 
We are well in 2009 already.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-07 14:54:40 +02:00
Marco Costalba
a88e762b4e Rewrite the way application exits 
Centralize in a single object all the global resources
management and avoid a bunch of sparse exit() calls.

This is more reliable and clean and more stick to C++ coding
practices.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-05-07 12:59:19 +02:00
Marco Costalba
ef8acdc73b Fix a small bug in king safety 
Merged from iPhone Glaurung.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-22 13:11:24 +01:00
Marco Costalba
feb5342b39 Safe guard some wild and ugly casts 
These casts are needed but plain ugly, at least be
sure they don't hide any subtle conversion bug.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-16 13:59:41 +01:00
Marco Costalba
b870f5a091 Silence a good bunch of Intel warnings 
Note that some pawns and material info has been switched
to int from int8_t.

This is a waste of space but it is not clear if we have a
faster or slower code (or nothing changed), some test should be
needed.

Few warnings still are alive.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-15 18:19:08 +01:00
Marco Costalba
8de91be61e Fix a silly warning on Intel compiler 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-15 18:18:42 +01:00
Marco Costalba
ca4e78db8d Revert NULL move beta corrections 
After testing result is bad -25 ELO
 2009-03-15 16:44:12 +01:00
Marco Costalba
c8773c720a Merge Joona Kiiski NULL search beta correction 
Prune more moves after a null search because of
a lower beta limit then in main search.

In test positions reduces the searched nodes of 30% !!!!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-14 13:00:22 +01:00
Marco Costalba
3ed603cd64 Merge Joona Kiiski evaluation tweaks 
Merge tewaks to many evaluation parameters
by Joona Kiiski.

After test they seem good!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-14 12:55:14 +01:00
Marco Costalba
72b88e09e1 Micro optimize previous patch 
Also remove some Intel warnings, not all :-(

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-06 20:47:19 +01:00
Marco Costalba
3e663d8c50 Introduce evaluate_pieces<>() to remove redundancy 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-03-06 19:19:45 +01:00
Marco Costalba
7f4f18f959 Revert mobility of pinned pieces for now 
We will redo after rewriting the handling of
pinned bitboard and its friends.
 2009-02-19 15:49:54 +01:00
Marco Costalba
c45818e9f8 Remove xxx_of_color() for real 
Remove also from assert expressions. Was hidden
in release mode.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-17 17:26:15 +01:00
Marco Costalba
9f5b709db7 Mobility is zero for a pinned piece 
A little bit more overhead, but better mobility evaluation.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-17 11:29:14 +01:00
Marco Costalba
2c955f25de Remove xxx_of_color() helpers 
They hide the underlying uniform function call with
no benefit.

A little bit more verbose but now is clear what happens.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-17 10:54:47 +01:00
Marco Costalba
4b53bb02f6 Fix a very old bug in queen mobility 
For queen mobility could be bigger then 15, so
we need count_1s() not count_1s_max_15().

This bug was introduced by patch:
"Group common evaluate code" of 24/9/2008

So it's almost 4 months and two release old!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-10 16:11:33 +01:00
Marco Costalba
bdbbc4e06b Rewrite evaluate_common() as a template 
Seems to speed up this very hot path and code is
cleaner too.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-07 15:48:22 +01:00
Marco Costalba
5cacefe7c6 Another micro-optmization in valuate_passed_pawns() 
very small gain, but still a gain at the cost of
an extra indentation level.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-07 15:47:31 +01:00
Marco Costalba
9b87d151bc Fix a small bug in rook pawn evaluation 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-06 16:10:22 +01:00
Marco Costalba
cbfbf25d1b evaluate_passed_pawns() micro-optmization 
No functional change, only a bit faster.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-06 16:06:08 +01:00
Marco Costalba
90585a8a36 Final space inflate of evaluatio.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-06 15:59:08 +01:00
Marco Costalba
e236a0c652 Space inflate evaluate_passed_pawns() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-06 15:49:33 +01:00
Marco Costalba
d0804341c5 Piece mobility: filter out squares protected by pawns 
Do not consider squares protected by enemy pawns
in mobility evaluation.

This reduces the mobility value by about 15%

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-05 15:14:16 +01:00
Marco Costalba
e3b03f13b3 Passed pawns: consider enemy rooks or queens from behind 
Merged from Glaurung 2.2

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-12-22 12:10:15 +01:00
Marco Costalba
54b7da120f King safety: retire rook contact check 
Merged from Glaurung 2.2

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-12-22 12:07:00 +01:00
Marco Costalba
61c6a3d5a0 Merge cosmetics from Glaurung 2.2 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-12-21 17:02:34 +01:00
Marco Costalba
31d4f0b734 Merge space weigth evaluation fromGlaurung 2.2 
Is a new evaluation rule that gives bonus in midgame
to the side that has more space behind pawns for its
minor pieces.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-12-21 16:26:36 +01:00
Marco Costalba
9d5d69e435 Revert sigmoid interpolator 
After deep test (1000 games) it seems do not improve anything,
actually seems slightly weaker.

So remove it for now.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-30 21:16:47 +01:00
Marco Costalba
af59cb1d63 Refactor Position::pinned_pieces() to use templates 
Also better document this interesting function.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:04 +02:00
Marco Costalba
5dc2312121 Update copyright info 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:20 +02:00
Marco Costalba
760f77872f Remove Positions::xxx_count() functions 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:18 +02:00
Marco Costalba
d4f14a8e83 Remove Position::xxx_list() functions 
No useful, only obfuscating.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:17 +02:00
Marco Costalba
d9e54ceaa1 Prefer template to name decoration 
This also allows faster code although bigger.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:16 +02:00
Marco Costalba
b00abed181 Space inflate evaluate_king() 
This is the most complex piece of software
so far.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-26 05:54:49 +02:00
Marco Costalba
2e3faae067 Clarify difference between king zone and adjacent zone 
There are subtle differences in the king evaluation
that should be clear to avoid misunderstandings.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-26 05:54:49 +02:00
Marco Costalba
453e815d4b Tidy up quick_evaluate() 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-26 05:54:49 +02:00
Marco Costalba
3e0dc9ee84 Tidy up middle game specific evaluation 
Also add starting position to benchmarks.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-26 05:54:49 +02:00
Marco Costalba
597ef38c39 Code style massage evaluate() 
No functional changes.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-26 05:54:49 +02:00
Marco Costalba
3ee3cdc09b Evaluate: weight_option() is static 
Declare function under local namespace. This removes a
warning from the picky Intel compiler.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-24 21:17:28 +02:00
Marco Costalba
ca891e9760 Cleanup read_weights() in evaluate.cpp 
Exception to 80 colums rule here, but result
seems better.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-24 21:02:16 +02:00
Marco Costalba
dfcfed6432 Evaluate: rename king attack variables 
A better naming IMHO

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-24 21:02:15 +02:00
Marco Costalba
34ca22486a Further cleanup evaluate() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-09-24 21:02:15 +02:00