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Author SHA1 Message Date
Marco Costalba
67375f4693 Use template for endgame scaling functions 
Also integrate scaling and evaluation in a
single base class.

Nice use of templates here :-)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:55:29 +01:00
Marco Costalba
039badfda8 Use templates for end game evaluation functions 
Huge simplification and no speed cost penalty.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:55:14 +01:00
Marco Costalba
088ecc242f Small code formatting in position.cpp 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:54:56 +01:00
Marco Costalba
a188a047ab Use update_checkers<>() also for PAWN 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:54:37 +01:00
Marco Costalba
1d2247aea3 Introduce update_checkers() to simplify do_move() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:54:17 +01:00
Marco Costalba
8365f8ac1e Remove square_is_attacked() 
Use attacks_to() instead. No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:53:58 +01:00
Marco Costalba
68d36b6f59 Rename generate_piece_blocking_evasions() 
In generate_piece_moves() to be more uniform with other
functions. Unfortunatly the different number of calling arguments
do not allow us to easily integrate in generate_piece_moves()
template family.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:53:39 +01:00
Marco Costalba
33c608e140 Final touches to generate_evasions() 
Small code tidy up and a little optimization
to avoid calling generate_piece_blocking_evasions()
when blockSquares is empty (30% of cases).

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:53:13 +01:00
Marco Costalba
ff60dafe8d Simplify legality check in generate_evasions() 
Now that we have removed sliders checkers attacks
from evasion's set we can simplyfy legality check.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-13 20:52:52 +01:00
Marco Costalba
214f9dcc27 generate_evasions() avoid an usless check for enpassant case 
Remove ugly and useless code.
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-11 19:01:26 +01:00
Marco Costalba
1dc1cecf01 Optimize generate_piece_blocking_evasions() 
Rewrite as in generate_piece_moves() using a for
loop instead of the slower serializing of the
bitboard with pop_1st_bit()

This will allow also to merge with generate_piece_moves()
when we will drop legality constrain on generate_evasions()

Generated moves are not changed, but are generated in a
different order, this changes the number of nodes at fixed
depth test.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-11 19:01:06 +01:00
Marco Costalba
67535711e8 generate_evasions() avoid to calculate pinned pieces 
Pass as function argument.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-11 19:00:52 +01:00
Marco Costalba
56f607fe0f Drop a double semicolon 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-11 19:00:35 +01:00
Marco Costalba
9d044cf4ee Last touches to movegen.cpp 
Of course no functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:51 +01:00
Marco Costalba
769f2fdecb Remove special case of pawn checks generation 
Also additional renaming.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:49 +01:00
Marco Costalba
9bffe811c4 Remove special case of pawn move generatation 
Code cleanup. No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:47 +01:00
Marco Costalba
3e20c6c07d Simplify generate_evasions() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:45 +01:00
Marco Costalba
4f5f97107e Simplify generate_checks() 
Also rearrange signatures to be uniform.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:43 +01:00
Marco Costalba
151d47dc85 Micro-optimize do_generate_pawn_checks() 
Discovery check candidates are normally empty, so
avoid discovery checks generation in that common case.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:41 +01:00
Marco Costalba
33ddeec5e0 Templetize generate_piece_checks_king() 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-10 19:01:39 +01:00
Marco Costalba
4573d618e4 Small optimization in generate_evasions() 
Find squares attacked by slider checkers, we will
remove them from king evasions set so to avoid a couple
of cycles in the slow king evasions legality check loop.

Not a biggie, but now generate_evasions() is faster then
generate_non_captures(), before was slower.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-07 13:26:57 +01:00
Marco Costalba
1156eb865b Simplify newly introduced castling_is_check() 
Use bit_is_set() instead of open coding.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-07 13:26:50 +01:00
Marco Costalba
76381cbd69 Small code style tidy up 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-07 13:26:42 +01:00
Marco Costalba
fa322b3768 Fix casting warnings under Intel Compiler 
Int to Char warning fixed changing the function
signature to int.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-07 13:26:29 +01:00
Marco Costalba
2ea7449f2a Fix Makefile 
Was broken after we removed color.cpp and square.cpp

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-07 13:26:17 +01:00
Marco Costalba
ee6e8851be Templetize generate_castle_moves() 
Cleanup the code and remove lines.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-06 07:14:38 +01:00
Marco Costalba
03211296f1 Add generation of castling checks 
When we generate checks one case is missing: generation
of castling moves that give check to the opponent king.

This is a very rare case but anyway it is a case
and we can do this without slowing down the common
case of no castling checks.

So this is the patch.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-06 07:14:16 +01:00
Marco Costalba
cc76951483 Remove square.cpp 
Move the few stuff in square.h

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:41:56 +01:00
Marco Costalba
f0858cd229 Move constants from piece.cpp to piece.h 
Leave in piece.cpp only a couple of functions that
need #include <cstring>

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:41:38 +01:00
Marco Costalba
225d89c51b PawnInfo::clear() retire memset() and fix Ubuntu compile 
Go back to original direct assignment, this allows to
add an include in pawns.h to teach about memset()

This fix a compile error under Ubuntu.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:41:17 +01:00
Marco Costalba
8bef9e59a0 Remove the useless color.cpp 
Integrate the only (inline) function in color.h

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:40:43 +01:00
Marco Costalba
82bf08e4f2 Final endgame.cpp space inflate 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:40:31 +01:00
Marco Costalba
c32904f0a0 Revert previous commit. 
Optimization is correct but slightly slower
so it is a pessimization :-)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-02-04 19:40:09 +01:00
Marco Costalba
6cfb661ca5 Yet another count_1s() optimization 
No functional change

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-25 19:29:15 +01:00
Marco Costalba
be43219136 Rever count_1s() optimizations 
They are wrong for all ones case.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-25 18:00:57 +01:00
Marco Costalba
d5b77ad45e MovePicker, remove a variable 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-25 13:52:35 +01:00
Marco Costalba
c6d62b7da5 MovePicker::find_best_index() never returns -1 
So avoid checking for it.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-25 13:36:59 +01:00
Marco Costalba
3e6e57231e Rewrite count_1s() to be similar to 64bit counterpart 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-11 17:15:18 +01:00
Marco Costalba
14c1fd4d27 Micro optimize count_1s_max_15() for 32 bit system 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-11 17:05:29 +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
ec2927286a Start to space inflate endgame.cpp 
Still a lot to do, it's a big file!

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-08 15:46:57 +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
539051b1e0 Big trailing whitespace cleanup part 2 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-07 15:48:11 +01:00
Marco Costalba
c97104e854 Big trailing whitespace cleanup part 1 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2009-01-07 15:47:59 +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