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216 commits

Author SHA1 Message Date
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
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
8a0dd93c56 Generate moves for powerful pieces first 
This seems to reduce searched nodes by a
surprising 2.5%

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-24 20:43:29 +01:00
Marco Costalba
5e2fc2aa16 Fix a bug in generate_evasions() 
Introduced in the patch "movegen: prefer (*mlist++) to mlist[n++]"

This was nasty because due to a mismerge the repo in one PC had the bug,
but the testing one did not, so I had non reproducible results according
to which machine I used for testing.

This hopefully closes a more then one week regression that made me go crazy!

It was found by accident comparing, for other reasons, the sources of the
two PC's.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-11-01 12:46:51 +01:00
Marco Costalba
74f1efee26 Manual merge 2008-10-26 21:44:58 +01:00
Marco Costalba
4397e6c03e Better naming of pseudo-legality and legality testing 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-26 10:11:13 +01:00
Marco Costalba
ad956ef00a Space inflate position until do_promotion_move() 
We will end some day ;-)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:05 +02:00
Marco Costalba
d155cd88d1 Start to space inflate position.cpp 
It's a big file!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:05 +02:00
Marco Costalba
2aebf8eb55 Fix a performance bug in generate_move_if_legal 
Use the pinned argument in pos.move_is_legal()

No functional change, simply use pos.move_is_legal() as
was meant to be.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:05 +02:00
Marco Costalba
2f8961beef movegen: add SERIALIZE_MOVES and hides a bunch of loops 
Only syntactic sugar, perhaps we should leave as is, anyhow...

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:04 +02:00
Marco Costalba
af5743837d Another generate_piece_moves() micro optimization 
This time on the for loop.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:10:04 +02:00
Marco Costalba
5e768e4b0a Fix another template conversion bug in movegen 
Hopefully the last one.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-24 21:09:51 +02:00
Marco Costalba
2d867109d9 movegen: prefer (*mlist++) to mlist[n++] 
Teoretically faster, practically it helps to
removes some more lines.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-23 07:17:04 +02:00
Marco Costalba
b145e99559 Fix a bug in generate_pawn_captures() 
Introduced in "movegen: Introduce generate_pawn_captures()"
when unifiying black and white functions.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-23 07:17:04 +02:00
Marco Costalba
8f2c1c59eb Fully templetize pawn move generators 
A little bit more syntax heavuer but surely faster.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-23 07:17:04 +02:00
Marco Costalba
c40249e9d2 Micro optimize generate_piece_moves() 
It is a time critical path. The biggest in move generation.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-21 00:10:27 +02:00
Marco Costalba
ce93a202b5 Another Intel warning sqeezed 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:57:13 +02:00
Marco Costalba
af6571856e Shrink arguments in move generation functions 
Perhaps no speedup, but it is more readable.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:21 +02:00
Marco Costalba
0c8659721f Fix a bug in king discoveries checks 
Introduced in "Add a generate_piece_checks() specialization for the king"

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:20 +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
aa94f2f4c2 Last little touches to movegen 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:19 +02:00
Marco Costalba
d7161c1ce6 Rename PawnOffsets in PawnParams 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:19 +02:00
Marco Costalba
e2af0e775b Pawn move generator: dispatch at compile time 
Instead of function pointers use templates to
dispatch shift operations.

It is more clear and possibly also faster because
branches are removed at compile time.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:19 +02:00
Marco Costalba
ad1bb084dd Start to templetize pawn move generators 
Still very soft, we will see if compiler is
enough or we need more aggressive templetization.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:18 +02:00
Marco Costalba
7eb290a509 Add a generate_piece_checks() specialization for the king 
Also reshuffle the code a bit.

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
6b8a07eccc Fix an assert due to a missing parentesis 
Bitwise operators precedence issue here, was
causing an assert.

This is a fallout from recent patches.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:15 +02:00
Marco Costalba
8e85aa3a65 Final semplification of generate_evasions() 
Now it's readable!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:15 +02:00
Marco Costalba
4f18528a1c Introduce generate_piece_blocking_evasions() 
Start to simplify generate_evasions

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:15 +02:00
Marco Costalba
4a4d62da13 Space inflate generate_evasions() 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:15 +02:00
Marco Costalba
d3600c39a7 Update copyright info 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 20:43:33 +01:00
Marco Costalba
f664ca41ed Last little touches to movegen 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 20:43:21 +01:00
Marco Costalba
b397426785 Rename PawnOffsets in PawnParams 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 20:43:09 +01:00
Marco Costalba
68c78400c8 Pawn move generator: dispatch at compile time 
Instead of function pointers use templates to
dispatch shift operations.

It is more clear and possibly also faster because
branches are removed at compile time.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 20:42:12 +01:00
Marco Costalba
1bd1f5a293 Start to templetize pawn move generators 
Still very soft, we will see if compiler is
enough or we need more aggressive templetization.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 16:20:21 +01:00
Marco Costalba
305b711ca8 Add a generate_piece_checks() specialization for the king 
Also reshuffle the code a bit.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 13:22:03 +01:00
Marco Costalba
f036239521 Prefer template to name decoration 
This also allows faster code although bigger.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 12:43:09 +01:00
Marco Costalba
00bcc64787 Fix an assert due to a missing parentesis 
Bitwise operators precedence issue here, was
causing an assert.

This is a fallout from recent patches.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 10:17:17 +01:00
Marco Costalba
f2ead1004a Final semplification of generate_evasions() 
Now it's readable!

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 09:33:33 +01:00
Marco Costalba
84ce43498a Introduce generate_piece_blocking_evasions() 
Start to simplify generate_evasions

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-19 08:49:26 +01:00