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46 commits

Author SHA1 Message Date
Marco Costalba
6fb0a1bc40 Introduce distance() and unify some API 
Original work by Lucas.

No functional change.
 2014-11-09 10:27:04 +01:00
Marco Costalba
c6fc51c5ea Fix a warning with MSVC in 'analyze' mode 
Here MSVC is worried that

StepAttacksBB[PAWN][psq]

could overflow, so change psq initialization
to clarify psq is always less than 64.

No functional change.
 2014-06-14 12:46:58 +02:00
Marco Costalba
fcf2a34080 Some more work in pretty_pv 
No functional change.
 2014-04-06 10:15:11 +02:00
Marco Costalba
5f12069cbf Retire operator|(File f, Rank r) 
Use make_square() instead. Less fancy but
more clear.

No functional change.
 2014-03-22 23:54:18 +01:00
Marco Costalba
e4695f15bc Additional renaming from DON 
Assorted renaming and triviality.

No functional change.
 2014-02-14 09:42:50 +01:00
Marco Costalba
a646f74e6a Assorted grammar fixes 
Mainly from Lyudmil Antonov and
one from Henri Wiechers and Louis Zulli.

No functional change.
 2014-01-07 14:30:41 +09:00
Marco Costalba
c9dcda6ac4 Update copyright year 
No functional change.
 2014-01-02 01:49:18 +01:00
Arjun Temurnikar
190aea4cdc Assorted spelling/grammar/captitalization 
No functional change.
 2013-12-04 23:30:37 +01:00
Jerry Donald
500b9b0eb3 Assorted spelling fixes 
No functional change.
 2013-12-02 18:41:30 +01:00
Lucas Braesch
7f142d6817 Use prefix operators wherever possible 
No functional change.
 2013-10-05 18:10:43 +02:00
Marco Costalba
3abccdc82d Move classify_leaf() to c'tor in bitbases 
No functional change.
 2013-09-14 13:08:37 +02:00
Marco Costalba
8d6d0223bf Small touches to bitbase.cpp 
Inspired by Lucas's code:

https://github.com/lucasart/chess/blob/master/src/kpk.cc

No functional change.
 2013-09-14 11:19:12 +02:00
Marco Costalba
4ede49cd85 Fully qualify memset and memcpy 
And other trivial touches.

Ispired by Lucas's DiscoCheck

No functional change.
 2013-07-13 18:01:13 +02:00
Marco Costalba
818a3537a7 Use Them instead of ~Us 
Unortunatly we have no guarantee that the call to
operator~(Color c) is resolved at compile time.

Perhaps the solution would be to use C++11 const_expr,
but for now simply use the good old-style ternary operator
that works as expected.

No functional change.
 2013-05-11 11:49:44 +02:00
Marco Costalba
077e32efc9 Better document bitbase loop 
Thanks to Lucas to spot the weak comment and
to Jundery to suggest a better one.

No functional change.
 2013-03-19 19:08:41 +01:00
Marco Costalba
c5ec94d0f1 Update copyright year 
No functional change.
 2013-02-19 07:54:14 +01:00
Marco Costalba
e0dfb0bc34 Further speed up bitbase generation 
Another trick, along the same lines of previous
patch. This time we first check positions with
white side to move that, becuase we start with
pawn on rank 7, are easily classified as wins,
then black ones.

Number of cycles reduced to 15 !

Becuase now it is faster we can remove a lot of
code to detect theoretical draws. We will calculate
them anyhow, although a bit slower, but the speed
up trick more than compensates it.

Verified that generated bitbases match original ones.

No functional change.
 2013-02-15 11:58:33 +01:00
Marco Costalba
10d29add18 Speedup KPK bitbase of 25% 
Change the way the index is coded so that
now looping from 0 to IndexMax generates
the pawns from RANK_7 down to RANK2.

Becuase positions with pawns at RANK_7
are easily classified as wins/draws, this
small trick allows to reduce the number
of needed iterations from 30 down to 26!

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2013-02-13 20:13:56 +01:00
Marco Costalba
f2950ae206 Simplify bitbase.cpp 
Use a std::vector to store positions and
rearrange KPKPosition.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2013-02-13 20:13:44 +01:00
Marco Costalba
faaa1f1116 Don't push on the stack 200KB in one go 
This could be a limit on some platforms (as it seems
to be in Native Client). Patch from a SF fork on github:

47374afd6f

No functional change.
 2012-09-30 11:35:14 +02:00
Marco Costalba
7c1f8dbde9 Introduce namespace Bitbases 
Let's continue this namespace galore...

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-08-18 13:08:12 +01:00
Marco Costalba
6b5322ce00 Rename first_1 / last_1 in lsb / msb 
It seems more accurate: lsb is clear while 'first
bit' depends from where you look at the bitboard.

And fix compile in case of 64 bits platforms that
do not use BSFQ intrinsics.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-07-08 09:36:40 +01:00
Marco Costalba
5f5d056c8f Replace make_square() with operator|(File, Rank) 
Be fancy :-)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-06-23 09:17:54 +01:00
Marco Costalba
0ecc920a09 Add a known draw case in kpk bitbase generation 
Early classify as known draws the positions
where white king is trapped on the rook file.

Suggested by Dan Honeycutt.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-05-19 08:45:16 +01:00
Marco Costalba
a94fd3bbec Reformat kpk bitbase 
Simplify and streamline the code. Verified all the
resulting bitbases are not changed.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-01-30 19:19:47 +01:00
Marco Costalba
a492a9dd07 Bitwise operator overloads between Bitboard and Square 
Yes, we try to be fancy here ;-)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2012-01-29 10:59:50 +01:00
Marco Costalba
8307da0de7 Update copyright year to 2012 
And refresh Readme.txt while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-12-30 13:52:16 +01:00
Marco Costalba
a695ed65a8 Rename Pieces 
Align with PieceType naming convention and
make them more readable.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-12-28 10:38:48 +01:00
Marco Costalba
a44c5cf4f7 Prefer 0 to EmptyBoardBB 
Easier and even faster or at least easier to optimize.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-12-03 12:02:13 +01:00
Marco Costalba
c2c185423b Better naming borrowed from Critter 
In line with http://chessprogramming.wikispaces.com conventions.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-10-02 10:16:59 +01:00
Marco Costalba
15683034a7 Speed up kpk initialization 
The trick is to classify more position at first cycle,
so to reduce following work. Speed up is of about 50% !

Also some cleanup while there.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-06-15 12:11:35 +01:00
Marco Costalba
635be39acf Additional cleanup in bitbase.cpp 
Also better document what code does.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-03-12 18:22:22 +01:00
Marco Costalba
c1c0984452 Move KPKBitbase[] where it belongs 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-03-12 12:12:41 +01:00
Marco Costalba
d653aeca05 Fix a couple of issues in bitbase.cpp 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-03-12 11:22:02 +01:00
Marco Costalba
d9113d127b Rename NonSlidingAttacksBB[] in StepAttacksBB[] 
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-03-10 08:10:26 +01:00
Marco Costalba
0fcda095df Move all enum types definitions to types.h 
Cleanup headers while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-02-23 21:52:55 +01:00
Marco Costalba
be5b32bb9c Another round of bitboard.cpp cleanups 
Also renamed StepAttackBB[] in NonSlidingAttacksBB[]

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2011-01-04 11:12:31 +01:00
Marco Costalba
469e7c5143 Retire bitbase.h 
Moved the only prototipe where is needed.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2010-11-07 10:53:19 +01:00
Marco Costalba
2adbb80b8b Space inflate bitbase.cpp 
Also heavy cleanup while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2010-07-11 12:05:06 +01:00
Marco Costalba
9fc602bae7 Updated copyright year to 2010 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2010-03-20 11:27:07 +01:00
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
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
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
5dc2312121 Update copyright info 
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
 2008-10-20 21:47:20 +02:00
Marco Costalba
bb751d6c89 Initial import of Glaurung 2.1 2008-09-01 07:59:13 +02:00