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79 commits

Author SHA1 Message Date
Marco Costalba
6e00aa6bae Better document square flipping helpers
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-04-01 11:30:54 +01:00
Marco Costalba
304deb5e83 Rename Materials and Pawns hash stuff
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-31 11:59:23 +01:00
Marco Costalba
b356e0fae3 Rename lock.h to platform.h
And move some more platform specific code there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-24 10:05:17 +01:00
Marco Costalba
7bc3688714 Revert to byTypeBB[0] storing occupied squares
As it was in Glaurung times. Also rearranged order
so that byTypeBB[0] is accessed before byTypeBB[x]
to be more cache friendly. It seems there is even
a small speedup.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-18 12:02:23 +01:00
Marco Costalba
3dccdf5b83 Fix time_to_msec() precision
Result of t.time * 1000 should be a 64 bit value, not an int.

Bug reported by several users.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-10 19:38:56 +01:00
Marco Costalba
482b5b7ece Use new Time class in timed_wait()
And simplify the code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-05 19:18:46 +01:00
Marco Costalba
161c6b025e Rewrite time measurement code
Introduce and use a new Time class designed after
QTime, from Qt framework. Should be a more clear and
self documented code.

As an added benefit we now use 64 bits internally to get
millisecs from system time. This avoids to wrap around
to 0 every 2^32 milliseconds, which is 49.71 days.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-03-03 18:01:39 +01:00
Marco Costalba
5bb766e826 Rename promotion_piece_type() to promotion_type()
Shorter and equally clear to understand.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-02-26 18:39:53 +01:00
Marco Costalba
fd35d92c1e Increase MAX_PLY from 100 to 256
There is no need to limit the maximum ply searched to
100, with deep exclusion search extensions we could
reach it even with much smaller search depths.

The only drawback is an increase in stack usage, but
is limited mainly to id_loop(), in particular the
recursive search() functions are not affected.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-02-18 10:16:01 +01:00
Marco Costalba
875a8079bc Replace clear_bit() with xor_bit()
This allows to retire ClearMaskBB[] and use just
one SquareBB[] array to set and clear a bit.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-29 09:38:40 +01:00
Marco Costalba
b76c04c097 Rename ValueType to Bound
It is a more conventional and common naming.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-27 19:49:38 +01:00
Marco Costalba
04ff9c2548 Simplify our insertion sort implementation
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-23 20:24:15 +01:00
Marco Costalba
97e0b0a01e Assorted code style in movepicker.cpp
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-22 13:57:24 +01:00
Marco Costalba
d98150dffc Use operator~ to flip colors and squares
More natural and nicer. Idea from Critter.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-12 19:37:44 +01:00
Marco Costalba
0026c88b3a Retire OLD_LOCKS option
And make CRITICAL_SECTION locks the only option for Windows.
This guarantees backward compatibility with all the Windows
versions (even XP and older) and an hassle free experience
when compiling for Windows. Tests performed by Ingo and
reported on talkchess confirm there is no speed penalty
against the most modern SRW locks:

http://www.talkchess.com/forum/viewtopic.php?t=41835&start=20

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-07 11:18:09 +01:00
Marco Costalba
67338e6f32 Big renaming of move's helpers
The aim is to have shorter names without losing
readibility but, if possible, increasing it.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2012-01-02 12:03:54 +01:00
Marco Costalba
fb4b4f772e Fix Windows 64 build
Broken by previous patch.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-31 08:48:16 +01:00
Marco Costalba
f4dadee5e2 Reformat types.h
Retire obsolete code and reshuffle stuff.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-30 19:13:44 +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
0a6532a39d Retire run-time detection of hardware POPCNT
It was meant to build a single binary optimized
for any kind of CPU: with and without hardware POPCNT.

This is a nice idea but in practice was never used, or
people builds binary with popcnt enabled or not, mainly
according to their type of CPU. And it was also never
used in the official Jim's builds where, in case, would
be easier for a number of reasons, do build two different
versions: with and without SEE42 support.

So retire this feature and simplify the code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-30 12:17:03 +01:00
Marco Costalba
ad4739a6d4 Retire SquaresByColorBB[] and enum SquareColor
Use same_color_squares() instead.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-28 10:57:08 +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
750ac9ac50 Document mate distance pruning
It is simple but somewhat tricky code that deserves
a bit of documentation. A bit of renaming while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-27 18:53:00 +01:00
Marco Costalba
e89a8e0913 Correctly define operators in types.h
Be consistent with the way these operators are defined
in plain C (and in C++).

Spotted by Lucas Braesch.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-24 09:58:46 +01:00
Marco Costalba
14df99130f Fix description of endgame scaling functions
Triggered by a comment of Eelco on talkchess. Also
a bit of cleanup while there.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-10 12:40:05 +01:00
Marco Costalba
81cd417b45 Retire move.h
Also some assorted comments fixes and other trivia.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-12-04 11:36:03 +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
Alexander Kure
5c8af7ccb8 Replaced macros Min() and Max() with corresponding STL algorithms std::min() and std::max() 2011-10-31 00:38:44 -04:00
Marco Costalba
f2e78d9f84 Retire PieceValueXXX[] getters
They don't add any value given that the corresponding
table has global visibility anyhow.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-10-22 16:06:59 +01:00
Marco Costalba
1a8e3f0b2e Small touches in position.h
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-10-03 14:18:56 +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
b706165527 Lookup square distance instead of calculate on the fly
Microptimization that gives a +0.7% speed increase.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-09-11 10:11:43 +01:00
Marco Costalba
f25582d4b8 Remove duplicated enum Phase definition
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-06-29 17:54:12 +01:00
Marco Costalba
ae2f5f25cd Rename type_of_piece() and color_of_piece()
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-06-26 10:52:42 +01:00
Marco Costalba
351ef5c85b Retire seeValues[] and move PieceValue[] out of Position
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-06-26 10:19:37 +01:00
Marco Costalba
72760c05c6 Try only recaptures in qsearch if depth is very low
This avoids search explosion in qsearch for some
patological cases like:

r1n1n1b1/1P1P1P1P/1N1N1N2/2RnQrRq/2pKp3/3BNQbQ/k7/4Bq2 w - - 0 1

After 9078 games 20"+0.1 QUAD:
Mod vs Orig 1413 - 1319 - 6346 ELO +3 (+- 4)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-06-15 12:17:49 +01:00
Marco Costalba
89ec224cb9 Retire some unused functions
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-06-11 15:56:12 +01:00
Marco Costalba
ff9e49bac9 Remove useless casts in types.h
No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-05-22 08:52:39 +01:00
Marco Costalba
2f1935078d Assorted code style and comments in pawns.cpp and pawns.h
The only interesting thing is that a backward or isolated
pawn cannot be a candidate passer, so code this condition.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-04-10 12:16:36 +01:00
Marco Costalba
408fdcc93f Use a constant instead of value_mate_in(PLY_MAX)
And also apply the same to value_mated_in(PLY_MAX)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-04-01 21:46:45 +01:00
Marco Costalba
5ea08e79c4 Use intrinsic in pop_1st_bit() under MSVC 64 bits
Around 1% speedup when compiled with MSVC 64

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-03-17 14:29:09 +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
2f6788104f Silence silly MSVC warning c4146
Warning C4146: unary minus operator applied to
unsigned type, result still unsigned.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-29 14:10:05 +01:00
Marco Costalba
69726f4df3 Remove defined(IS_64BIT) in init_sliding_attacks()
No functional change bith in 32 and 64 bits.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-29 14:06:29 +01:00
Marco Costalba
13a42284b6 Move Min() and Max() macros to types.h
As usual a bit of cleanup while there...

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-15 11:00:00 +01:00
Marco Costalba
d84ffc0cfa Compile fix in types.h
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-10 12:54:08 +01:00
Marco Costalba
b3545737fa Force inlining of move generation functions
MSVC (and possibly other compilers) does not inline
as requested, so force it to do so.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-07 16:57:15 +01:00
Marco Costalba
803c8e0be3 Small tidy up of inttypes for Windows
There was a strange "int16" type and "int64_t"
was defined twice.

Spotted by Joona.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-06 23:28:06 +01:00
Marco Costalba
7614501362 Fix POPCNT support for Intel compiler under Windows
Reported by Martin Wyngaarden that also confirmed
this patch to work.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-05 21:12:19 +01:00
Joona Kiiski
83d8d54216 Use simple macro to enable operators
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
2011-01-03 22:27:17 +01:00