--- /dev/null
+name: Stockfish
+on:
+ push:
+ branches:
+ - master
+ - tools
+ - github_ci
+ pull_request:
+ branches:
+ - master
+ - tools
+jobs:
+ Stockfish:
+ name: ${{ matrix.config.name }}
+ runs-on: ${{ matrix.config.os }}
+ env:
+ COMPILER: ${{ matrix.config.compiler }}
+ COMP: ${{ matrix.config.comp }}
+ CXXFLAGS: "-Werror"
+ strategy:
+ matrix:
+ config:
+ - {
+ name: "Ubuntu 20.04 GCC",
+ os: ubuntu-20.04,
+ compiler: g++,
+ comp: gcc,
+ run_expensive_tests: true
+ }
+ - {
+ name: "Ubuntu 20.04 Clang",
+ os: ubuntu-20.04,
+ compiler: clang++,
+ comp: clang,
+ run_expensive_tests: false
+ }
+
+ defaults:
+ run:
+ working-directory: src
+ steps:
+ - uses: actions/checkout@v2
+ with:
+ fetch-depth: 0
+
+ - name: Download required packages
+ run: |
+ sudo apt update
+ sudo apt install expect valgrind g++-multilib
+
+ - name: Download the used network from the fishtest framework
+ run: |
+ make net
+
+ - name: Extract the bench number from the commit history
+ run: |
+ git log HEAD | grep "\b[Bb]ench[ :]\+[0-9]\{7\}" | head -n 1 | sed "s/[^0-9]*\([0-9]*\).*/\1/g" > git_sig
+ [ -s git_sig ] && echo "benchref=$(cat git_sig)" >> $GITHUB_ENV && echo "Reference bench:" $(cat git_sig) || echo "No bench found"
+
+ - name: Check compiler
+ run: |
+ $COMPILER -v
+
+ - name: Test help target
+ run: |
+ make help
+
+ # x86-32 tests
+
+ - name: Test debug x86-32 build
+ run: |
+ export CXXFLAGS="-Werror -D_GLIBCXX_DEBUG"
+ make clean
+ make -j2 ARCH=x86-32 optimize=no debug=yes build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-32 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-32 build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-32-sse41-popcnt build
+ run: |
+ make clean
+ make -j2 ARCH=x86-32-sse41-popcnt build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-32-sse2 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-32-sse2 build
+ ../tests/signature.sh $benchref
+
+ - name: Test general-32 build
+ run: |
+ make clean
+ make -j2 ARCH=general-32 build
+ ../tests/signature.sh $benchref
+
+ # x86-64 tests
+
+ - name: Test debug x86-64-modern build
+ run: |
+ export CXXFLAGS="-Werror -D_GLIBCXX_DEBUG"
+ make clean
+ make -j2 ARCH=x86-64-modern optimize=no debug=yes build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-64-modern build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-modern build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-64-ssse3 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-ssse3 build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-64-sse3-popcnt build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-sse3-popcnt build
+ ../tests/signature.sh $benchref
+
+ - name: Test x86-64 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64 build
+ ../tests/signature.sh $benchref
+
+ - name: Test general-64 build
+ run: |
+ make clean
+ make -j2 ARCH=general-64 build
+ ../tests/signature.sh $benchref
+
+ # x86-64 with newer extensions tests
+
+ - name: Compile x86-64-avx2 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-avx2 build
+
+ - name: Compile x86-64-bmi2 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-bmi2 build
+
+ - name: Compile x86-64-avx512 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-avx512 build
+
+ - name: Compile x86-64-vnni512 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-vnni512 build
+
+ - name: Compile x86-64-vnni256 build
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-vnni256 build
+
+ # Other tests
+
+ - name: Check perft and search reproducibility
+ run: |
+ make clean
+ make -j2 ARCH=x86-64-modern build
+ ../tests/perft.sh
+ ../tests/reprosearch.sh
+
+ # Sanitizers
+
+ - name: Run under valgrind
+ if: ${{ matrix.config.run_expensive_tests }}
+ run: |
+ export CXXFLAGS="-O1 -fno-inline"
+ make clean
+ make -j2 ARCH=x86-64-modern debug=yes optimize=no build > /dev/null
+ ../tests/instrumented.sh --valgrind
+ ../tests/instrumented.sh --valgrind-thread
+
+ - name: Run with UB sanitizer
+ if: ${{ matrix.config.run_expensive_tests }}
+ run: |
+ export CXXFLAGS="-O1 -fno-inline"
+ make clean
+ make -j2 ARCH=x86-64-modern sanitize=undefined optimize=no debug=yes build > /dev/null
+ ../tests/instrumented.sh --sanitizer-undefined
+
+ - name: Run with thread sanitizer
+ if: ${{ matrix.config.run_expensive_tests }}
+ run: |
+ export CXXFLAGS="-O1 -fno-inline"
+ make clean
+ make -j2 ARCH=x86-64-modern sanitize=thread optimize=no debug=yes build > /dev/null
+ ../tests/instrumented.sh --sanitizer-thread
+++ /dev/null
-language: cpp
-dist: bionic
-
-matrix:
- include:
- - os: linux
- compiler: gcc
- addons:
- apt:
- packages: ['g++-8', 'g++-8-multilib', 'g++-multilib', 'valgrind', 'expect', 'curl']
- env:
- - COMPILER=g++-8
- - COMP=gcc
-
- - os: linux
- compiler: clang
- addons:
- apt:
- packages: ['clang-10', 'llvm-10-dev', 'g++-multilib', 'valgrind', 'expect', 'curl']
- env:
- - COMPILER=clang++-10
- - COMP=clang
-
- - os: osx
- osx_image: xcode12
- compiler: gcc
- env:
- - COMPILER=g++
- - COMP=gcc
-
- - os: osx
- osx_image: xcode12
- compiler: clang
- env:
- - COMPILER=clang++
- - COMP=clang
-
-branches:
- only:
- - master
-
-before_script:
- - cd src
-
-script:
- # Download net
- - make net
-
- # Obtain bench reference from git log
- - git log HEAD | grep "\b[Bb]ench[ :]\+[0-9]\{7\}" | head -n 1 | sed "s/[^0-9]*\([0-9]*\).*/\1/g" > git_sig
- - export benchref=$(cat git_sig)
- - echo "Reference bench:" $benchref
-
- # Compiler version string
- - $COMPILER -v
-
- # test help target
- - make help
-
- # Verify bench number against various builds
- - export CXXFLAGS="-Werror -D_GLIBCXX_DEBUG"
- - make clean && make -j2 ARCH=x86-64-modern optimize=no debug=yes build && ../tests/signature.sh $benchref
- - export CXXFLAGS="-Werror"
- - make clean && make -j2 ARCH=x86-64-modern build && ../tests/signature.sh $benchref
- - make clean && make -j2 ARCH=x86-64-ssse3 build && ../tests/signature.sh $benchref
- - make clean && make -j2 ARCH=x86-64-sse3-popcnt build && ../tests/signature.sh $benchref
- - make clean && make -j2 ARCH=x86-64 build && ../tests/signature.sh $benchref
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=general-64 build && ../tests/signature.sh $benchref; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-32 optimize=no debug=yes build && ../tests/signature.sh $benchref; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-32-sse41-popcnt build && ../tests/signature.sh $benchref; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-32-sse2 build && ../tests/signature.sh $benchref; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-32 build && ../tests/signature.sh $benchref; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=general-32 build && ../tests/signature.sh $benchref; fi
- # workaround: exclude a custom version of llvm+clang, which doesn't find llvm-profdata on ubuntu
- - if [[ "$TRAVIS_OS_NAME" != "linux" || "$COMP" == "gcc" ]]; then make clean && make -j2 ARCH=x86-64-modern profile-build && ../tests/signature.sh $benchref; fi
-
- # compile only for some more advanced architectures (might not run in travis)
- - make clean && make -j2 ARCH=x86-64-avx2 build
- - make clean && make -j2 ARCH=x86-64-bmi2 build
- - make clean && make -j2 ARCH=x86-64-avx512 build
- - make clean && make -j2 ARCH=x86-64-vnni512 build
- - make clean && make -j2 ARCH=x86-64-vnni256 build
-
- #
- # Check perft and reproducible search
- - make clean && make -j2 ARCH=x86-64-modern build
- - ../tests/perft.sh
- - ../tests/reprosearch.sh
-
- #
- # Valgrind
- #
- - export CXXFLAGS="-O1 -fno-inline"
- - if [ -x "$(command -v valgrind )" ]; then make clean && make -j2 ARCH=x86-64-modern debug=yes optimize=no build > /dev/null && ../tests/instrumented.sh --valgrind; fi
- - if [ -x "$(command -v valgrind )" ]; then ../tests/instrumented.sh --valgrind-thread; fi
-
- #
- # Sanitizer
- #
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-64-modern sanitize=undefined optimize=no debug=yes build > /dev/null && ../tests/instrumented.sh --sanitizer-undefined; fi
- - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && make -j2 ARCH=x86-64-modern sanitize=thread optimize=no debug=yes build > /dev/null && ../tests/instrumented.sh --sanitizer-thread; fi
-# List of authors for Stockfish, as of August 4, 2020
+# List of authors for Stockfish, as of June 14, 2021
# Founders of the Stockfish project and fishtest infrastructure
Tord Romstad (romstad)
Antoine Champion (antoinechampion)
Aram Tumanian (atumanian)
Arjun Temurnikar
+Artem Solopiy (EntityFX)
Auguste Pop
Balint Pfliegel
Ben Koshy (BKSpurgeon)
DiscanX
Dominik Schlösser (domschl)
double-beep
+Douglas Matos Gomes (dsmsgms)
Eduardo Cáceres (eduherminio)
Eelco de Groot (KingDefender)
Elvin Liu (solarlight2)
Jörg Oster (joergoster)
Joseph Ellis (jhellis3)
Joseph R. Prostko
+Julian Willemer (NightlyKing)
jundery
Justin Blanchard (UncombedCoconut)
Kelly Wilson
Stefano Cardanobile (Stefano80)
Steinar Gunderson (sesse)
Stéphane Nicolet (snicolet)
+Prokop Randáček (ProkopRandacek)
Thanar2
thaspel
theo77186
## Overview
-[](https://travis-ci.org/official-stockfish/Stockfish)
+[](https://github.com/official-stockfish/Stockfish/actions)
[](https://ci.appveyor.com/project/mcostalba/stockfish/branch/master)
[Stockfish](https://stockfishchess.org) is a free, powerful UCI chess engine
This distribution of Stockfish consists of the following files:
- * Readme.md, the file you are currently reading.
+ * [Readme.md](https://github.com/official-stockfish/Stockfish/blob/master/README.md), the file you are currently reading.
- * Copying.txt, a text file containing the GNU General Public License version 3.
-
- * AUTHORS, a text file with the list of authors for the project
+ * [Copying.txt](https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt), a text file containing the GNU General Public License version 3.
- * src, a subdirectory containing the full source code, including a Makefile
+ * [AUTHORS](https://github.com/official-stockfish/Stockfish/blob/master/AUTHORS), a text file with the list of authors for the project
+
+ * [src](https://github.com/official-stockfish/Stockfish/tree/master/src), a subdirectory containing the full source code, including a Makefile
that can be used to compile Stockfish on Unix-like systems.
- * a file with the .nnue extension, storing the neural network for the NNUE
+ * a file with the .nnue extension, storing the neural network for the NNUE
evaluation. Binary distributions will have this file embedded.
-## UCI options
+## The UCI protocol and available options
+
+The Universal Chess Interface (UCI) is a standard protocol used to communicate with
+a chess engine, and is the recommended way to do so for typical graphical user interfaces
+(GUI) or chess tools. Stockfish implements the majority of it options as described
+in [the UCI protocol](https://www.shredderchess.com/download/div/uci.zip).
-Currently, Stockfish has the following UCI options:
+Developers can see the default values for UCI options available in Stockfish by typing
+`./stockfish uci` in a terminal, but the majority of users will typically see them and
+change them via a chess GUI. This is a list of available UCI options in Stockfish:
* #### Threads
The number of CPU threads used for searching a position. For best performance, set
Limit Syzygy tablebase probing to positions with at most this many pieces left
(including kings and pawns).
- * #### Contempt
- A positive value for contempt favors middle game positions and avoids draws,
- effective for the classical evaluation only.
-
- * #### Analysis Contempt
- By default, contempt is set to prefer the side to move. Set this option to "White"
- or "Black" to analyse with contempt for that side, or "Off" to disable contempt.
-
* #### Move Overhead
Assume a time delay of x ms due to network and GUI overheads. This is useful to
avoid losses on time in those cases.
* #### Debug Log File
Write all communication to and from the engine into a text file.
+For developers the following non-standard commands might be of interest, mainly useful for debugging:
+
+ * #### bench *ttSize threads limit fenFile limitType evalType*
+ Performs a standard benchmark using various options. The signature of a version (standard node
+ count) is obtained using all defaults. `bench` is currently `bench 16 1 13 default depth mixed`.
+
+ * #### compiler
+ Give information about the compiler and environment used for building a binary.
+
+ * #### d
+ Display the current position, with ascii art and fen.
+
+ * #### eval
+ Return the evaluation of the current position.
+
+ * #### export_net [filename]
+ Exports the currently loaded network to a file.
+ If the currently loaded network is the embedded network and the filename
+ is not specified then the network is saved to the file matching the name
+ of the embedded network, as defined in evaluate.h.
+ If the currently loaded network is not the embedded network (some net set
+ through the UCI setoption) then the filename parameter is required and the
+ network is saved into that file.
+
+ * #### flip
+ Flips the side to move.
+
+
## A note on classical evaluation versus NNUE evaluation
Both approaches assign a value to a position that is used in alpha-beta (PVS) search
that is guaranteed to be compatible with that binary.
2) to use the NNUE evaluation, the additional data file with neural network parameters
-needs to be available. Normally, this file is already embedded in the binary or it
+needs to be available. Normally, this file is already embedded in the binary or it
can be downloaded. The filename for the default (recommended) net can be found as the default
value of the `EvalFile` UCI option, with the format `nn-[SHA256 first 12 digits].nnue`
(for instance, `nn-c157e0a5755b.nnue`). This file can be downloaded from
If the engine is searching a position that is not in the tablebases (e.g.
a position with 8 pieces), it will access the tablebases during the search.
-If the engine reports a very large score (typically 153.xx), this means
+If the engine reports a very large score (typically 153.xx), this means
it has found a winning line into a tablebase position.
If the engine is given a position to search that is in the tablebases, it
need to manually set/unset some switches in the compiler command line; see
file *types.h* for a quick reference.
-When reporting an issue or a bug, please tell us which version and
-compiler you used to create your executable. These informations can
-be found by typing the following commands in a console:
+When reporting an issue or a bug, please tell us which Stockfish version
+and which compiler you used to create your executable. This information
+can be found by typing the following command in a console:
```
./stockfish compiler
## Understanding the code base and participating in the project
-Stockfish's improvement over the last couple of years has been a great
-community effort. There are a few ways to help contribute to its growth.
+Stockfish's improvement over the last decade has been a great community
+effort. There are a few ways to help contribute to its growth.
### Donating hardware
these changes must also be made available under the GPL.
For full details, read the copy of the GPL v3 found in the file named
-*Copying.txt*.
+[*Copying.txt*](https://github.com/official-stockfish/Stockfish/blob/master/Copying.txt).
-Contributors to Fishtest with >10,000 CPU hours, as of Feb 15, 2021.
+Contributors to Fishtest with >10,000 CPU hours, as of Jun 29, 2021.
Thank you!
-Username CPU Hours Games played
-----------------------------------------------------
-noobpwnftw 23930906 1560559941
-dew 1169948 70333008
-mlang 957168 61657446
-mibere 703840 46867607
-tvijlbrief 517888 33379462
-JojoM 515404 30334272
-cw 443276 29385549
-crunchy 427035 27344275
-grandphish2 425794 26347253
-fastgm 414133 24519696
-gvreuls 377843 24708884
-CSU_Dynasty 338718 23030006
-Fisherman 326795 21820747
-TueRens 313730 19490246
-ctoks 298442 20052551
-velislav 270519 17355456
-bcross 241064 17196165
-glinscott 217799 13780820
-nordlandia 211692 13484886
-bking_US 198894 11876016
-drabel 191096 13129722
-leszek 189170 11446821
-mgrabiak 187153 12013300
-robal 181389 11539242
-Thanar 179852 12365359
-vdv 175274 9889046
-spams 157128 10319326
-marrco 150292 9401741
-sqrt2 147963 9724586
-CoffeeOne 137086 5022516
-vdbergh 137041 8926915
-malala 136182 8002293
-mhoram 132780 8398229
-xoto 124729 8652088
-davar 122092 7960001
-dsmith 122059 7570238
-Data 113305 8220352
-BrunoBanani 112960 7436849
-pemo 109598 5036441
-Dantist 106768 6431396
-MaZePallas 102741 6630419
-ElbertoOne 99028 7023771
-brabos 92118 6186135
-linrock 90903 6708639
-psk 89957 5984901
-sunu 88614 6020673
-sterni1971 86948 5613788
-Vizvezdenec 83761 5344740
-BRAVONE 81239 5054681
-nssy 76497 5259388
-cuistot 76366 4370584
-racerschmacer 75753 5442626
-teddybaer 75125 5407666
-Pking_cda 73776 5293873
-0x3C33 73133 4670293
-jromang 72117 5054915
-solarlight 70517 5028306
-dv8silencer 70287 3883992
-Bobo1239 68515 4652287
-manap 66273 4121774
-tinker 64321 4268390
-robnjr 57262 4053117
-Freja 56938 3733019
-ttruscott 56010 3680085
-rkl 54986 4150767
-renouve 53811 3501516
-finfish 51360 3370515
-eva42 51272 3599691
-rap 49985 3219146
-pb00067 49727 3298270
-amicic 49691 3042481
-ronaldjerum 47654 3240695
-bigpen0r 47278 3291647
-biffhero 46564 3111352
-VoyagerOne 45476 3452465
-eastorwest 45033 3071805
-speedycpu 43842 3003273
-jbwiebe 43305 2805433
-Antihistamine 41788 2761312
-mhunt 41735 2691355
-homyur 39893 2850481
-gri 39871 2515779
-oryx 38282 2944400
-Spprtr 38157 2470529
-SC 37290 2731014
-csnodgrass 36207 2688994
-jmdana 36157 2210661
-strelock 34716 2074055
-Garf 33800 2747562
-skiminki 33515 2055584
-EthanOConnor 33370 2090311
-slakovv 32915 2021889
-yurikvelo 32600 2255966
-Prcuvu 30377 2170122
-manapbk 30326 1770143
-anst 30301 2190091
-jkiiski 30136 1904470
-hyperbolic.tom 29840 2017394
-Pyafue 29650 1902349
-qurashee 27758 1509620
-OuaisBla 27636 1578800
-chriswk 26902 1868317
-achambord 26582 1767323
-Fifis 26376 1776853
-Patrick_G 26276 1801617
-yorkman 26193 1992080
-SFTUser 25182 1675689
-nabildanial 24942 1519409
-Sharaf_DG 24765 1786697
-ncfish1 24411 1520927
-agg177 23890 1395014
-JanErik 23408 1703875
-Isidor 23388 1680691
-Norabor 23164 1591830
-cisco2015 22895 1762069
-Zirie 22542 1472937
-team-oh 22272 1636708
-MazeOfGalious 21978 1629593
-sg4032 21945 1643065
-ianh2105 21725 1632562
-xor12 21628 1680365
-dex 21612 1467203
-nesoneg 21494 1463031
-jjoshua2 20997 1422689
-horst.prack 20878 1465656
-0xB00B1ES 20590 1208666
-sphinx 20515 1352368
-j3corre 20405 941444
-Adrian.Schmidt123 20316 1281436
-Ente 20017 1432602
-wei 19973 1745989
-rstoesser 19569 1293588
-eudhan 19274 1283717
-jundery 18445 1115855
-iisiraider 18247 1101015
-ville 17883 1384026
-chris 17698 1487385
-purplefishies 17595 1092533
-DMBK 17357 1279152
-DragonLord 17014 1162790
-dju 16515 929427
-IgorLeMasson 16064 1147232
-ako027ako 15671 1173203
-Nikolay.IT 15154 1068349
-Andrew Grant 15114 895539
-OssumOpossum 14857 1007129
-enedene 14476 905279
-bpfliegel 14298 884523
-jpulman 13982 870599
-joster 13794 950160
-Nesa92 13786 1114691
-crocogoat 13753 1114622
-Hjax 13535 915487
-Dark_wizzie 13422 1007152
-mpx86 12941 693640
-mabichito 12903 749391
-thijsk 12886 722107
-AdrianSA 12860 804972
-Flopzee 12698 894821
-fatmurphy 12547 853210
-scuzzi 12511 845761
-Karby 12429 735880
-SapphireBrand 12416 969604
-modolief 12386 896470
-pgontarz 12151 848794
-stocky 11954 699440
-mschmidt 11941 803401
-infinity 11470 727027
-torbjo 11395 729145
-Thomas A. Anderson 11372 732094
-d64 11263 789184
-Maxim 11129 804704
-snicolet 11106 869170
-MooTheCow 11008 694942
-savage84 10965 641068
-Rudolphous 10915 741268
-Wolfgang 10809 580032
-rpngn 10712 688203
-basepi 10637 744851
-michaelrpg 10409 735127
-dzjp 10343 732529
-ali-al-zhrani 10324 726502
-ols 10259 570669
-lbraesch 10252 647825
+Username CPU Hours Games played
+-----------------------------------------------------
+noobpwnftw 27649494 1834734733
+mlang 1426107 89454622
+dew 1380910 82831648
+mibere 703840 46867607
+grandphish2 692707 41737913
+tvijlbrief 669642 42371594
+JojoM 597778 35297180
+TueRens 519226 31823562
+cw 458421 30307421
+fastgm 439667 25950040
+gvreuls 436599 28177460
+crunchy 427035 27344275
+CSU_Dynasty 374765 25106278
+Fisherman 326901 21822979
+ctoks 325477 21767943
+velislav 295343 18844324
+linrock 292789 10624427
+bcross 278584 19488961
+okrout 262818 13803272
+pemo 245982 11376085
+glinscott 217799 13780820
+leszek 212346 12959025
+nordlandia 211692 13484886
+bking_US 198894 11876016
+drabel 196463 13450602
+robal 195473 12375650
+mgrabiak 187226 12016564
+Dantist 183202 10990484
+Thanar 179852 12365359
+vdv 175274 9889046
+spams 157128 10319326
+marrco 150295 9402141
+sqrt2 147963 9724586
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+FormazChar 10059 757283
BINDIR = $(PREFIX)/bin
### Built-in benchmark for pgo-builds
-PGOBENCH = ./$(EXE) bench
+ifeq ($(SDE_PATH),)
+ PGOBENCH = ./$(EXE) bench
+else
+ PGOBENCH = $(SDE_PATH) -- ./$(EXE) bench
+endif
### Source and object files
SRCS = benchmark.cpp bitbase.cpp bitboard.cpp endgame.cpp evaluate.cpp main.cpp \
material.cpp misc.cpp movegen.cpp movepick.cpp pawns.cpp position.cpp psqt.cpp \
search.cpp thread.cpp timeman.cpp tt.cpp uci.cpp ucioption.cpp tune.cpp syzygy/tbprobe.cpp \
- nnue/evaluate_nnue.cpp nnue/features/half_kp.cpp \
+ nnue/evaluate_nnue.cpp nnue/features/half_ka_v2.cpp \
hashprobe.grpc.pb.cc hashprobe.pb.cc
CLISRCS = client.cpp hashprobe.grpc.pb.cc hashprobe.pb.cc uci.cpp
# ----------------------------------------------------------------------------
#
# debug = yes/no --- -DNDEBUG --- Enable/Disable debug mode
-# sanitize = undefined/thread/no (-fsanitize )
+# sanitize = none/<sanitizer> ... (-fsanitize )
# --- ( undefined ) --- enable undefined behavior checks
-# --- ( thread ) --- enable threading error checks
+# --- ( thread ) --- enable threading error checks
+# --- ( address ) --- enable memory access checks
+# --- ...etc... --- see compiler documentation for supported sanitizers
# optimize = yes/no --- (-O3/-fast etc.) --- Enable/Disable optimizations
# arch = (name) --- (-arch) --- Target architecture
# bits = 64/32 --- -DIS_64BIT --- 64-/32-bit operating system
# Note that Makefile is space sensitive, so when adding new architectures
# or modifying existing flags, you have to make sure there are no extra spaces
# at the end of the line for flag values.
+#
+# Example of use for these flags:
+# make build ARCH=x86-64-avx512 debug=on sanitize="address undefined"
+
### 2.1. General and architecture defaults
ifeq ($(ARCH), $(filter $(ARCH), \
x86-64-vnni512 x86-64-vnni256 x86-64-avx512 x86-64-bmi2 x86-64-avx2 \
x86-64-sse41-popcnt x86-64-modern x86-64-ssse3 x86-64-sse3-popcnt \
- x86-64 x86-32-sse41-popcnt x86-32-sse2 x86-32 ppc-64 ppc-32 \
+ x86-64 x86-32-sse41-popcnt x86-32-sse2 x86-32 ppc-64 ppc-32 e2k \
armv7 armv7-neon armv8 apple-silicon general-64 general-32))
SUPPORTED_ARCH=true
else
optimize = yes
debug = no
-sanitize = no
+sanitize = none
bits = 64
prefetch = no
popcnt = no
prefetch = yes
endif
+ifeq ($(findstring e2k,$(ARCH)),e2k)
+ arch = e2k
+ mmx = yes
+ bits = 64
+ sse = yes
+ sse2 = yes
+ ssse3 = yes
+ sse41 = yes
+ popcnt = yes
+endif
+
endif
### ==========================================================================
ifneq ($(KERNEL),Darwin)
ifneq ($(KERNEL),OpenBSD)
ifneq ($(KERNEL),FreeBSD)
+ ifneq ($(RTLIB),compiler-rt)
LDFLAGS += -latomic
endif
endif
endif
+ endif
ifeq ($(arch),$(filter $(arch),armv7 armv8))
ifeq ($(OS),Android)
endif
### 3.2.2 Debugging with undefined behavior sanitizers
-ifneq ($(sanitize),no)
- CXXFLAGS += -g3 -fsanitize=$(sanitize)
- LDFLAGS += -fsanitize=$(sanitize)
+ifneq ($(sanitize),none)
+ CXXFLAGS += -g3 $(addprefix -fsanitize=,$(sanitize))
+ LDFLAGS += $(addprefix -fsanitize=,$(sanitize))
endif
### 3.3 Optimization
endif
endif
-
ifeq ($(avx2),yes)
CXXFLAGS += -DUSE_AVX2
ifeq ($(comp),$(filter $(comp),gcc clang mingw))
@echo "armv7 > ARMv7 32-bit"
@echo "armv7-neon > ARMv7 32-bit with popcnt and neon"
@echo "armv8 > ARMv8 64-bit with popcnt and neon"
+ @echo "e2k > Elbrus 2000"
@echo "apple-silicon > Apple silicon ARM64"
@echo "general-64 > unspecified 64-bit"
@echo "general-32 > unspecified 32-bit"
@rm -rf profdir
@rm -f bench.txt *.gcda *.gcno ./syzygy/*.gcda ./nnue/*.gcda ./nnue/features/*.gcda *.s
@rm -f stockfish.profdata *.profraw
+ @rm -f stockfish.exe.lto_wrapper_args
+ @rm -f stockfish.exe.ltrans.out
+ @rm -f ./-lstdc++.res
default:
help
@echo "Testing config sanity. If this fails, try 'make help' ..."
@echo ""
@test "$(debug)" = "yes" || test "$(debug)" = "no"
- @test "$(sanitize)" = "undefined" || test "$(sanitize)" = "thread" || test "$(sanitize)" = "address" || test "$(sanitize)" = "no"
@test "$(optimize)" = "yes" || test "$(optimize)" = "no"
@test "$(SUPPORTED_ARCH)" = "true"
@test "$(arch)" = "any" || test "$(arch)" = "x86_64" || test "$(arch)" = "i386" || \
- test "$(arch)" = "ppc64" || test "$(arch)" = "ppc" || \
+ test "$(arch)" = "ppc64" || test "$(arch)" = "ppc" || test "$(arch)" = "e2k" || \
test "$(arch)" = "armv7" || test "$(arch)" = "armv8" || test "$(arch)" = "arm64"
@test "$(bits)" = "32" || test "$(bits)" = "64"
@test "$(prefetch)" = "yes" || test "$(prefetch)" = "no"
all
gcc-profile-make:
+ @mkdir -p profdir
$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
- EXTRACXXFLAGS='-fprofile-generate' \
+ EXTRACXXFLAGS='-fprofile-generate=profdir' \
EXTRALDFLAGS='-lgcov' \
all
gcc-profile-use:
$(MAKE) ARCH=$(ARCH) COMP=$(COMP) \
- EXTRACXXFLAGS='-fprofile-use -fno-peel-loops -fno-tracer' \
+ EXTRACXXFLAGS='-fprofile-use=profdir -fno-peel-loops -fno-tracer' \
EXTRALDFLAGS='-lgcov' \
all
$(PROTOC) -I $(PROTOS_PATH) --cpp_out=. $<
#LDFLAGS += -Wl,-Bstatic -Wl,-\( -lprotobuf -lgrpc++_unsecure -lgrpc_unsecure -lgrpc -lz -Wl,-\) -Wl,-Bdynamic -ldl
-LDFLAGS += /usr/lib/x86_64-linux-gnu/libprotobuf.a /usr/lib/x86_64-linux-gnu/libgrpc++_unsecure.a /usr/lib/x86_64-linux-gnu/libgrpc_unsecure.a /usr/lib/x86_64-linux-gnu/libgrpc.a /usr/lib/x86_64-linux-gnu/libcares.a -ldl -lz
+LDFLAGS += /usr/lib/x86_64-linux-gnu/libprotobuf.a /usr/lib/x86_64-linux-gnu/libgrpc++_unsecure.a /usr/lib/x86_64-linux-gnu/libgrpc_unsecure.a /usr/lib/x86_64-linux-gnu/libgrpc.a /usr/lib/x86_64-linux-gnu/libcares.a /usr/lib/x86_64-linux-gnu/libgpr.a /usr/lib/x86_64-linux-gnu/libabsl_str_format_internal.a /usr/lib/x86_64-linux-gnu/libabsl_strings.a /usr/lib/x86_64-linux-gnu/libabsl_flags_marshalling.a /usr/lib/x86_64-linux-gnu/libabsl_throw_delegate.a /usr/lib/x86_64-linux-gnu/libabsl_raw_logging_internal.a /usr/lib/x86_64-linux-gnu/libabsl_base.a /usr/lib/x86_64-linux-gnu/libabsl_int128.a /usr/lib/x86_64-linux-gnu/libabsl_bad_optional_access.a -ldl -lz
#LDFLAGS += /usr/lib/x86_64-linux-gnu/libprotobuf.a /usr/lib/libgrpc++_unsecure.a /usr/lib/libgrpc_unsecure.a /usr/lib/libgrpc.a /usr/lib/x86_64-linux-gnu/libcares.a -ldl -lz
client: $(CLIOBJS)
Bitboard b = attacks_bb<KING>(ksq[stm]);
while (b)
- r |= stm == WHITE ? db[index(BLACK, ksq[BLACK] , pop_lsb(&b), psq)]
- : db[index(WHITE, pop_lsb(&b), ksq[WHITE], psq)];
+ r |= stm == WHITE ? db[index(BLACK, ksq[BLACK], pop_lsb(b), psq)]
+ : db[index(WHITE, pop_lsb(b), ksq[WHITE], psq)];
if (stm == WHITE)
{
Bitboard SquareBB[SQUARE_NB];
Bitboard LineBB[SQUARE_NB][SQUARE_NB];
+Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
Bitboard PawnAttacks[COLOR_NB][SQUARE_NB];
for (PieceType pt : { BISHOP, ROOK })
for (Square s2 = SQ_A1; s2 <= SQ_H8; ++s2)
+ {
if (PseudoAttacks[pt][s1] & s2)
- LineBB[s1][s2] = (attacks_bb(pt, s1, 0) & attacks_bb(pt, s2, 0)) | s1 | s2;
+ {
+ LineBB[s1][s2] = (attacks_bb(pt, s1, 0) & attacks_bb(pt, s2, 0)) | s1 | s2;
+ BetweenBB[s1][s2] = (attacks_bb(pt, s1, square_bb(s2)) & attacks_bb(pt, s2, square_bb(s1)));
+ }
+ BetweenBB[s1][s2] |= s2;
+ }
}
}
for (Direction d : (pt == ROOK ? RookDirections : BishopDirections))
{
Square s = sq;
- while(safe_destination(s, d) && !(occupied & s))
+ while (safe_destination(s, d) && !(occupied & s))
attacks |= (s += d);
}
extern uint8_t SquareDistance[SQUARE_NB][SQUARE_NB];
extern Bitboard SquareBB[SQUARE_NB];
+extern Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
extern Bitboard LineBB[SQUARE_NB][SQUARE_NB];
extern Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
extern Bitboard PawnAttacks[COLOR_NB][SQUARE_NB];
inline Bitboard line_bb(Square s1, Square s2) {
assert(is_ok(s1) && is_ok(s2));
+
return LineBB[s1][s2];
}
-/// between_bb() returns a bitboard representing squares that are linearly
-/// between the two given squares (excluding the given squares). If the given
-/// squares are not on a same file/rank/diagonal, we return 0. For instance,
-/// between_bb(SQ_C4, SQ_F7) will return a bitboard with squares D5 and E6.
+/// between_bb(s1, s2) returns a bitboard representing the squares in the semi-open
+/// segment between the squares s1 and s2 (excluding s1 but including s2). If the
+/// given squares are not on a same file/rank/diagonal, it returns s2. For instance,
+/// between_bb(SQ_C4, SQ_F7) will return a bitboard with squares D5, E6 and F7, but
+/// between_bb(SQ_E6, SQ_F8) will return a bitboard with the square F8. This trick
+/// allows to generate non-king evasion moves faster: the defending piece must either
+/// interpose itself to cover the check or capture the checking piece.
inline Bitboard between_bb(Square s1, Square s2) {
- Bitboard b = line_bb(s1, s2) & ((AllSquares << s1) ^ (AllSquares << s2));
- return b & (b - 1); //exclude lsb
+
+ assert(is_ok(s1) && is_ok(s2));
+
+ return BetweenBB[s1][s2];
}
-/// forward_ranks_bb() returns a bitboard representing the squares on the ranks
-/// in front of the given one, from the point of view of the given color. For instance,
+/// forward_ranks_bb() returns a bitboard representing the squares on the ranks in
+/// front of the given one, from the point of view of the given color. For instance,
/// forward_ranks_bb(BLACK, SQ_D3) will return the 16 squares on ranks 1 and 2.
constexpr Bitboard forward_ranks_bb(Color c, Square s) {
#endif
+/// least_significant_square_bb() returns the bitboard of the least significant
+/// square of a non-zero bitboard. It is equivalent to square_bb(lsb(bb)).
+
+inline Bitboard least_significant_square_bb(Bitboard b) {
+ assert(b);
+ return b & -b;
+}
/// pop_lsb() finds and clears the least significant bit in a non-zero bitboard
-inline Square pop_lsb(Bitboard* b) {
- assert(*b);
- const Square s = lsb(*b);
- *b &= *b - 1;
+inline Square pop_lsb(Bitboard& b) {
+ assert(b);
+ const Square s = lsb(b);
+ b &= b - 1;
return s;
}
#include "misc.h"
#include "pawns.h"
#include "thread.h"
+#include "timeman.h"
#include "uci.h"
#include "incbin/incbin.h"
using namespace std;
-using namespace Stockfish::Eval::NNUE;
namespace Stockfish {
else
os << scores[t][WHITE] << " | " << scores[t][BLACK];
- os << " | " << scores[t][WHITE] - scores[t][BLACK] << "\n";
+ os << " | " << scores[t][WHITE] - scores[t][BLACK] << " |\n";
return os;
}
}
namespace {
// Threshold for lazy and space evaluation
- constexpr Value LazyThreshold1 = Value(1565);
- constexpr Value LazyThreshold2 = Value(1102);
- constexpr Value SpaceThreshold = Value(11551);
- constexpr Value NNUEThreshold1 = Value(682);
- constexpr Value NNUEThreshold2 = Value(176);
+ constexpr Value LazyThreshold1 = Value(3130);
+ constexpr Value LazyThreshold2 = Value(2204);
+ constexpr Value SpaceThreshold = Value(11551);
// KingAttackWeights[PieceType] contains king attack weights by piece type
constexpr int KingAttackWeights[PIECE_TYPE_NB] = { 0, 0, 81, 52, 44, 10 };
S(0, 0), S(3, 44), S(37, 68), S(42, 60), S(0, 39), S(58, 43)
};
+ constexpr Value CorneredBishop = Value(50);
+
// Assorted bonuses and penalties
constexpr Score UncontestedOutpost = S( 1, 10);
constexpr Score BishopOnKingRing = S( 24, 0);
constexpr Score BishopXRayPawns = S( 4, 5);
- constexpr Score CorneredBishop = S( 50, 50);
constexpr Score FlankAttacks = S( 8, 0);
constexpr Score Hanging = S( 69, 36);
constexpr Score KnightOnQueen = S( 16, 11);
attackedBy[Us][Pt] = 0;
- while (b1) {
- Square s = pop_lsb(&b1);
+ while (b1)
+ {
+ Square s = pop_lsb(b1);
// Find attacked squares, including x-ray attacks for bishops and rooks
b = Pt == BISHOP ? attacks_bb<BISHOP>(s, pos.pieces() ^ pos.pieces(QUEEN))
{
Direction d = pawn_push(Us) + (file_of(s) == FILE_A ? EAST : WEST);
if (pos.piece_on(s + d) == make_piece(Us, PAWN))
- score -= !pos.empty(s + d + pawn_push(Us)) ? CorneredBishop * 4
- : pos.piece_on(s + d + d) == make_piece(Us, PAWN) ? CorneredBishop * 2
- : CorneredBishop;
+ score -= !pos.empty(s + d + pawn_push(Us)) ? 4 * make_score(CorneredBishop, CorneredBishop)
+ : 3 * make_score(CorneredBishop, CorneredBishop);
}
}
}
{
b = (defended | weak) & (attackedBy[Us][KNIGHT] | attackedBy[Us][BISHOP]);
while (b)
- score += ThreatByMinor[type_of(pos.piece_on(pop_lsb(&b)))];
+ score += ThreatByMinor[type_of(pos.piece_on(pop_lsb(b)))];
b = weak & attackedBy[Us][ROOK];
while (b)
- score += ThreatByRook[type_of(pos.piece_on(pop_lsb(&b)))];
+ score += ThreatByRook[type_of(pos.piece_on(pop_lsb(b)))];
if (weak & attackedBy[Us][KING])
score += ThreatByKing;
while (b)
{
- Square s = pop_lsb(&b);
+ Square s = pop_lsb(b);
assert(!(pos.pieces(Them, PAWN) & forward_file_bb(Us, s + Up)));
Color strongSide = eg > VALUE_DRAW ? WHITE : BLACK;
int sf = me->scale_factor(pos, strongSide);
- // If scale factor is not already specific, scale down via general heuristics
+ // If scale factor is not already specific, scale up/down via general heuristics
if (sf == SCALE_FACTOR_NORMAL)
{
if (pos.opposite_bishops())
// Initialize score by reading the incrementally updated scores included in
// the position object (material + piece square tables) and the material
// imbalance. Score is computed internally from the white point of view.
- Score score = pos.psq_score() + me->imbalance() + pos.this_thread()->contempt;
+ Score score = pos.psq_score() + me->imbalance() + pos.this_thread()->trend;
// Probe the pawn hash table
pe = Pawns::probe(pos);
// Early exit if score is high
auto lazy_skip = [&](Value lazyThreshold) {
- return abs(mg_value(score) + eg_value(score)) / 2 > lazyThreshold + pos.non_pawn_material() / 64;
+ return abs(mg_value(score) + eg_value(score)) > lazyThreshold + pos.non_pawn_material() / 32;
};
if (lazy_skip(LazyThreshold1))
v = (v / 16) * 16;
// Side to move point of view
- v = (pos.side_to_move() == WHITE ? v : -v) + Tempo;
+ v = (pos.side_to_move() == WHITE ? v : -v);
return v;
}
-} // namespace
+
+ /// Fisher Random Chess: correction for cornered bishops, to fix chess960 play with NNUE
+
+ Value fix_FRC(const Position& pos) {
+
+ constexpr Bitboard Corners = 1ULL << SQ_A1 | 1ULL << SQ_H1 | 1ULL << SQ_A8 | 1ULL << SQ_H8;
+
+ if (!(pos.pieces(BISHOP) & Corners))
+ return VALUE_ZERO;
+
+ int correction = 0;
+
+ if ( pos.piece_on(SQ_A1) == W_BISHOP
+ && pos.piece_on(SQ_B2) == W_PAWN)
+ correction += !pos.empty(SQ_B3) ? -CorneredBishop * 4
+ : -CorneredBishop * 3;
+
+ if ( pos.piece_on(SQ_H1) == W_BISHOP
+ && pos.piece_on(SQ_G2) == W_PAWN)
+ correction += !pos.empty(SQ_G3) ? -CorneredBishop * 4
+ : -CorneredBishop * 3;
+
+ if ( pos.piece_on(SQ_A8) == B_BISHOP
+ && pos.piece_on(SQ_B7) == B_PAWN)
+ correction += !pos.empty(SQ_B6) ? CorneredBishop * 4
+ : CorneredBishop * 3;
+
+ if ( pos.piece_on(SQ_H8) == B_BISHOP
+ && pos.piece_on(SQ_G7) == B_PAWN)
+ correction += !pos.empty(SQ_G6) ? CorneredBishop * 4
+ : CorneredBishop * 3;
+
+ return pos.side_to_move() == WHITE ? Value(correction)
+ : -Value(correction);
+ }
+
+} // namespace Eval
/// evaluate() is the evaluator for the outer world. It returns a static
else
{
// Scale and shift NNUE for compatibility with search and classical evaluation
- auto adjusted_NNUE = [&](){
- int mat = pos.non_pawn_material() + 2 * PawnValueMg * pos.count<PAWN>();
- return NNUE::evaluate(pos) * (641 + mat / 32 - 4 * pos.rule50_count()) / 1024 + Tempo;
+ auto adjusted_NNUE = [&]()
+ {
+ int scale = 903
+ + 32 * pos.count<PAWN>()
+ + 32 * pos.non_pawn_material() / 1024;
+
+ Value nnue = NNUE::evaluate(pos, true) * scale / 1024;
+
+ if (pos.is_chess960())
+ nnue += fix_FRC(pos);
+
+ return nnue;
};
- // If there is PSQ imbalance use classical eval, with small probability if it is small
+ // If there is PSQ imbalance we use the classical eval, but we switch to
+ // NNUE eval faster when shuffling or if the material on the board is high.
+ int r50 = pos.rule50_count();
Value psq = Value(abs(eg_value(pos.psq_score())));
- int r50 = 16 + pos.rule50_count();
- bool largePsq = psq * 16 > (NNUEThreshold1 + pos.non_pawn_material() / 64) * r50;
- bool classical = largePsq || (psq > PawnValueMg / 4 && !(pos.this_thread()->nodes & 0xB));
-
- // Use classical evaluation for really low piece endgames.
- // The most critical case is a bishop + A/H file pawn vs naked king draw.
- bool strongClassical = pos.non_pawn_material() < 2 * RookValueMg && pos.count<PAWN>() < 2;
-
- v = classical || strongClassical ? Evaluation<NO_TRACE>(pos).value() : adjusted_NNUE();
-
- // If the classical eval is small and imbalance large, use NNUE nevertheless.
- // For the case of opposite colored bishops, switch to NNUE eval with
- // small probability if the classical eval is less than the threshold.
- if ( largePsq && !strongClassical
- && ( abs(v) * 16 < NNUEThreshold2 * r50
- || ( pos.opposite_bishops()
- && abs(v) * 16 < (NNUEThreshold1 + pos.non_pawn_material() / 64) * r50
- && !(pos.this_thread()->nodes & 0xB))))
- v = adjusted_NNUE();
+ bool classical = psq * 5 > (750 + pos.non_pawn_material() / 64) * (5 + r50);
+
+ v = classical ? Evaluation<NO_TRACE>(pos).value() // classical
+ : adjusted_NNUE(); // NNUE
}
// Damp down the evaluation linearly when shuffling
/// descriptions and values of each evaluation term. Useful for debugging.
/// Trace scores are from white's point of view
-std::string Eval::trace(const Position& pos) {
+std::string Eval::trace(Position& pos) {
if (pos.checkers())
return "Final evaluation: none (in check)";
std::memset(scores, 0, sizeof(scores));
- pos.this_thread()->contempt = SCORE_ZERO; // Reset any dynamic contempt
+ pos.this_thread()->trend = SCORE_ZERO; // Reset any dynamic contempt
v = Evaluation<TRACE>(pos).value();
ss << std::showpoint << std::noshowpos << std::fixed << std::setprecision(2)
- << " Term | White | Black | Total \n"
- << " | MG EG | MG EG | MG EG \n"
- << " ------------+-------------+-------------+------------\n"
- << " Material | " << Term(MATERIAL)
- << " Imbalance | " << Term(IMBALANCE)
- << " Pawns | " << Term(PAWN)
- << " Knights | " << Term(KNIGHT)
- << " Bishops | " << Term(BISHOP)
- << " Rooks | " << Term(ROOK)
- << " Queens | " << Term(QUEEN)
- << " Mobility | " << Term(MOBILITY)
- << " King safety | " << Term(KING)
- << " Threats | " << Term(THREAT)
- << " Passed | " << Term(PASSED)
- << " Space | " << Term(SPACE)
- << " Winnable | " << Term(WINNABLE)
- << " ------------+-------------+-------------+------------\n"
- << " Total | " << Term(TOTAL);
+ << " Contributing terms for the classical eval:\n"
+ << "+------------+-------------+-------------+-------------+\n"
+ << "| Term | White | Black | Total |\n"
+ << "| | MG EG | MG EG | MG EG |\n"
+ << "+------------+-------------+-------------+-------------+\n"
+ << "| Material | " << Term(MATERIAL)
+ << "| Imbalance | " << Term(IMBALANCE)
+ << "| Pawns | " << Term(PAWN)
+ << "| Knights | " << Term(KNIGHT)
+ << "| Bishops | " << Term(BISHOP)
+ << "| Rooks | " << Term(ROOK)
+ << "| Queens | " << Term(QUEEN)
+ << "| Mobility | " << Term(MOBILITY)
+ << "|King safety | " << Term(KING)
+ << "| Threats | " << Term(THREAT)
+ << "| Passed | " << Term(PASSED)
+ << "| Space | " << Term(SPACE)
+ << "| Winnable | " << Term(WINNABLE)
+ << "+------------+-------------+-------------+-------------+\n"
+ << "| Total | " << Term(TOTAL)
+ << "+------------+-------------+-------------+-------------+\n";
- v = pos.side_to_move() == WHITE ? v : -v;
+ if (Eval::useNNUE)
+ ss << '\n' << NNUE::trace(pos) << '\n';
- ss << "\nClassical evaluation: " << to_cp(v) << " (white side)\n";
+ ss << std::showpoint << std::showpos << std::fixed << std::setprecision(2) << std::setw(15);
+ v = pos.side_to_move() == WHITE ? v : -v;
+ ss << "\nClassical evaluation " << to_cp(v) << " (white side)\n";
if (Eval::useNNUE)
{
- v = NNUE::evaluate(pos);
+ v = NNUE::evaluate(pos, false);
v = pos.side_to_move() == WHITE ? v : -v;
- ss << "\nNNUE evaluation: " << to_cp(v) << " (white side)\n";
+ ss << "NNUE evaluation " << to_cp(v) << " (white side)\n";
}
v = evaluate(pos);
v = pos.side_to_move() == WHITE ? v : -v;
- ss << "\nFinal evaluation: " << to_cp(v) << " (white side)\n";
+ ss << "Final evaluation " << to_cp(v) << " (white side)";
+ if (Eval::useNNUE)
+ ss << " [with scaled NNUE, hybrid, ...]";
+ ss << "\n";
return ss.str();
}
#define EVALUATE_H_INCLUDED
#include <string>
+#include <optional>
#include "types.h"
namespace Eval {
- std::string trace(const Position& pos);
+ std::string trace(Position& pos);
Value evaluate(const Position& pos);
extern bool useNNUE;
// The default net name MUST follow the format nn-[SHA256 first 12 digits].nnue
// for the build process (profile-build and fishtest) to work. Do not change the
// name of the macro, as it is used in the Makefile.
- #define EvalFileDefaultName "nn-62ef826d1a6d.nnue"
+ #define EvalFileDefaultName "nn-9e3c6298299a.nnue"
namespace NNUE {
- Value evaluate(const Position& pos);
- bool load_eval(std::string name, std::istream& stream);
+ std::string trace(Position& pos);
+ Value evaluate(const Position& pos, bool adjusted = false);
+
void init();
void verify();
+ bool load_eval(std::string name, std::istream& stream);
+ bool save_eval(std::ostream& stream);
+ bool save_eval(const std::optional<std::string>& filename);
+
} // namespace NNUE
} // namespace Eval
// Remove all illegal moves to disambiguate.
Bitboard att_copy = attackers;
while (att_copy) {
- Square s = pop_lsb(&att_copy);
+ Square s = pop_lsb(att_copy);
Move m = make_move(s, to);
if (!pos->pseudo_legal(m) || !pos->legal(m)) {
attackers &= ~SquareBB[s];
bool is_KBPsK(const Position& pos, Color us) {
return pos.non_pawn_material(us) == BishopValueMg
- && pos.count<PAWN >(us) >= 1;
+ && pos.count<PAWN>(us) >= 1;
}
bool is_KQKRPs(const Position& pos, Color us) {
#include <sys/mman.h>
#endif
-#if defined(__APPLE__) || defined(__ANDROID__) || defined(__OpenBSD__) || (defined(__GLIBCXX__) && !defined(_GLIBCXX_HAVE_ALIGNED_ALLOC) && !defined(_WIN32))
+#if defined(__APPLE__) || defined(__ANDROID__) || defined(__OpenBSD__) || (defined(__GLIBCXX__) && !defined(_GLIBCXX_HAVE_ALIGNED_ALLOC) && !defined(_WIN32)) || defined(__e2k__)
#define POSIXALIGNEDALLOC
#include <stdlib.h>
#endif
compiler += "(version ";
compiler += stringify(_MSC_FULL_VER) "." stringify(_MSC_BUILD);
compiler += ")";
+ #elif defined(__e2k__) && defined(__LCC__)
+ #define dot_ver2(n) \
+ compiler += (char)'.'; \
+ compiler += (char)('0' + (n) / 10); \
+ compiler += (char)('0' + (n) % 10);
+
+ compiler += "MCST LCC ";
+ compiler += "(version ";
+ compiler += std::to_string(__LCC__ / 100);
+ dot_ver2(__LCC__ % 100)
+ dot_ver2(__LCC_MINOR__)
+ compiler += ")";
#elif __GNUC__
compiler += "g++ (GNUC) ";
compiler += make_version_string(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__);
/// aligned_large_pages_alloc() will return suitably aligned memory, if possible using large pages.
#if defined(_WIN32)
-#if defined(_WIN64)
-static void* aligned_large_pages_alloc_win(size_t allocSize) {
+
+static void* aligned_large_pages_alloc_windows(size_t allocSize) {
+
+ #if !defined(_WIN64)
+ return nullptr;
+ #else
HANDLE hProcessToken { };
LUID luid { };
CloseHandle(hProcessToken);
return mem;
+
+ #endif
}
-#endif
void* aligned_large_pages_alloc(size_t allocSize) {
-#if defined(_WIN64)
// Try to allocate large pages
- void* mem = aligned_large_pages_alloc_win(allocSize);
+ void* mem = aligned_large_pages_alloc_windows(allocSize);
// Fall back to regular, page aligned, allocation if necessary
if (!mem)
mem = VirtualAlloc(NULL, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
-#else
- void* mem = VirtualAlloc(NULL, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
-#endif
return mem;
}
if (mem && !VirtualFree(mem, 0, MEM_RELEASE))
{
DWORD err = GetLastError();
- std::cerr << "Failed to free transposition table. Error code: 0x" <<
- std::hex << err << std::dec << std::endl;
+ std::cerr << "Failed to free large page memory. Error code: 0x"
+ << std::hex << err
+ << std::dec << std::endl;
exit(EXIT_FAILURE);
}
}
#define sync_cout std::cout << IO_LOCK
#define sync_endl std::endl << IO_UNLOCK
-// `ptr` must point to an array of size at least
-// `sizeof(T) * N + alignment` bytes, where `N` is the
-// number of elements in the array.
+
+// align_ptr_up() : get the first aligned element of an array.
+// ptr must point to an array of size at least `sizeof(T) * N + alignment` bytes,
+// where N is the number of elements in the array.
template <uintptr_t Alignment, typename T>
T* align_ptr_up(T* ptr)
{
return reinterpret_cast<T*>(reinterpret_cast<char*>((ptrint + (Alignment - 1)) / Alignment * Alignment));
}
+
+// IsLittleEndian : true if and only if the binary is compiled on a little endian machine
+static inline const union { uint32_t i; char c[4]; } Le = { 0x01020304 };
+static inline const bool IsLittleEndian = (Le.c[0] == 4);
+
+
+template <typename T>
+class ValueListInserter {
+public:
+ ValueListInserter(T* v, std::size_t& s) :
+ values(v),
+ size(&s)
+ {
+ }
+
+ void push_back(const T& value) { values[(*size)++] = value; }
+private:
+ T* values;
+ std::size_t* size;
+};
+
+template <typename T, std::size_t MaxSize>
+class ValueList {
+
+public:
+ std::size_t size() const { return size_; }
+ void resize(std::size_t newSize) { size_ = newSize; }
+ void push_back(const T& value) { values_[size_++] = value; }
+ T& operator[](std::size_t index) { return values_[index]; }
+ T* begin() { return values_; }
+ T* end() { return values_ + size_; }
+ const T& operator[](std::size_t index) const { return values_[index]; }
+ const T* begin() const { return values_; }
+ const T* end() const { return values_ + size_; }
+ operator ValueListInserter<T>() { return ValueListInserter(values_, size_); }
+
+ void swap(ValueList& other) {
+ const std::size_t maxSize = std::max(size_, other.size_);
+ for (std::size_t i = 0; i < maxSize; ++i) {
+ std::swap(values_[i], other.values_[i]);
+ }
+ std::swap(size_, other.size_);
+ }
+
+private:
+ T values_[MaxSize];
+ std::size_t size_ = 0;
+};
+
/// xorshift64star Pseudo-Random Number Generator
/// This class is based on original code written and dedicated
/// to the public domain by Sebastiano Vigna (2014).
namespace {
template<GenType Type, Direction D>
- ExtMove* make_promotions(ExtMove* moveList, Square to, Square ksq) {
+ ExtMove* make_promotions(ExtMove* moveList, Square to) {
if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
- {
*moveList++ = make<PROMOTION>(to - D, to, QUEEN);
- if (attacks_bb<KNIGHT>(to) & ksq)
- *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
- }
if (Type == QUIETS || Type == EVASIONS || Type == NON_EVASIONS)
{
*moveList++ = make<PROMOTION>(to - D, to, ROOK);
*moveList++ = make<PROMOTION>(to - D, to, BISHOP);
- if (!(attacks_bb<KNIGHT>(to) & ksq))
- *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
+ *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
}
return moveList;
constexpr Direction UpRight = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
constexpr Direction UpLeft = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
- const Square ksq = pos.square<KING>(Them);
- Bitboard emptySquares;
+ const Bitboard emptySquares = Type == QUIETS || Type == QUIET_CHECKS ? target : ~pos.pieces();
+ const Bitboard enemies = Type == EVASIONS ? pos.checkers()
+ : Type == CAPTURES ? target : pos.pieces(Them);
Bitboard pawnsOn7 = pos.pieces(Us, PAWN) & TRank7BB;
Bitboard pawnsNotOn7 = pos.pieces(Us, PAWN) & ~TRank7BB;
- Bitboard enemies = (Type == EVASIONS ? pos.pieces(Them) & target:
- Type == CAPTURES ? target : pos.pieces(Them));
-
// Single and double pawn pushes, no promotions
if (Type != CAPTURES)
{
- emptySquares = (Type == QUIETS || Type == QUIET_CHECKS ? target : ~pos.pieces());
-
Bitboard b1 = shift<Up>(pawnsNotOn7) & emptySquares;
Bitboard b2 = shift<Up>(b1 & TRank3BB) & emptySquares;
if (Type == QUIET_CHECKS)
{
- b1 &= pawn_attacks_bb(Them, ksq);
- b2 &= pawn_attacks_bb(Them, ksq);
-
- // Add pawn pushes which give discovered check. This is possible only
- // if the pawn is not on the same file as the enemy king, because we
- // don't generate captures. Note that a possible discovered check
- // promotion has been already generated amongst the captures.
- Bitboard dcCandidateQuiets = pos.blockers_for_king(Them) & pawnsNotOn7;
- if (dcCandidateQuiets)
- {
- Bitboard dc1 = shift<Up>(dcCandidateQuiets) & emptySquares & ~file_bb(ksq);
- Bitboard dc2 = shift<Up>(dc1 & TRank3BB) & emptySquares;
-
- b1 |= dc1;
- b2 |= dc2;
- }
+ // To make a quiet check, you either make a direct check by pushing a pawn
+ // or push a blocker pawn that is not on the same file as the enemy king.
+ // Discovered check promotion has been already generated amongst the captures.
+ Square ksq = pos.square<KING>(Them);
+ Bitboard dcCandidatePawns = pos.blockers_for_king(Them) & ~file_bb(ksq);
+ b1 &= pawn_attacks_bb(Them, ksq) | shift< Up>(dcCandidatePawns);
+ b2 &= pawn_attacks_bb(Them, ksq) | shift<Up+Up>(dcCandidatePawns);
}
while (b1)
{
- Square to = pop_lsb(&b1);
+ Square to = pop_lsb(b1);
*moveList++ = make_move(to - Up, to);
}
while (b2)
{
- Square to = pop_lsb(&b2);
+ Square to = pop_lsb(b2);
*moveList++ = make_move(to - Up - Up, to);
}
}
// Promotions and underpromotions
if (pawnsOn7)
{
- if (Type == CAPTURES)
- emptySquares = ~pos.pieces();
-
- if (Type == EVASIONS)
- emptySquares &= target;
-
Bitboard b1 = shift<UpRight>(pawnsOn7) & enemies;
Bitboard b2 = shift<UpLeft >(pawnsOn7) & enemies;
Bitboard b3 = shift<Up >(pawnsOn7) & emptySquares;
+ if (Type == EVASIONS)
+ b3 &= target;
+
while (b1)
- moveList = make_promotions<Type, UpRight>(moveList, pop_lsb(&b1), ksq);
+ moveList = make_promotions<Type, UpRight>(moveList, pop_lsb(b1));
while (b2)
- moveList = make_promotions<Type, UpLeft >(moveList, pop_lsb(&b2), ksq);
+ moveList = make_promotions<Type, UpLeft >(moveList, pop_lsb(b2));
while (b3)
- moveList = make_promotions<Type, Up >(moveList, pop_lsb(&b3), ksq);
+ moveList = make_promotions<Type, Up >(moveList, pop_lsb(b3));
}
// Standard and en passant captures
while (b1)
{
- Square to = pop_lsb(&b1);
+ Square to = pop_lsb(b1);
*moveList++ = make_move(to - UpRight, to);
}
while (b2)
{
- Square to = pop_lsb(&b2);
+ Square to = pop_lsb(b2);
*moveList++ = make_move(to - UpLeft, to);
}
{
assert(rank_of(pos.ep_square()) == relative_rank(Us, RANK_6));
- // An en passant capture cannot resolve a discovered check.
+ // An en passant capture cannot resolve a discovered check
if (Type == EVASIONS && (target & (pos.ep_square() + Up)))
return moveList;
assert(b1);
while (b1)
- *moveList++ = make<EN_PASSANT>(pop_lsb(&b1), pos.ep_square());
+ *moveList++ = make<EN_PASSANT>(pop_lsb(b1), pos.ep_square());
}
}
}
- template<PieceType Pt, bool Checks>
- ExtMove* generate_moves(const Position& pos, ExtMove* moveList, Bitboard piecesToMove, Bitboard target) {
+ template<Color Us, PieceType Pt, bool Checks>
+ ExtMove* generate_moves(const Position& pos, ExtMove* moveList, Bitboard target) {
static_assert(Pt != KING && Pt != PAWN, "Unsupported piece type in generate_moves()");
- Bitboard bb = piecesToMove & pos.pieces(Pt);
-
- if (!bb)
- return moveList;
-
- [[maybe_unused]] const Bitboard checkSquares = pos.check_squares(Pt);
-
- while (bb) {
- Square from = pop_lsb(&bb);
+ Bitboard bb = pos.pieces(Us, Pt);
+ while (bb)
+ {
+ Square from = pop_lsb(bb);
Bitboard b = attacks_bb<Pt>(from, pos.pieces()) & target;
- if constexpr (Checks)
- b &= checkSquares;
+
+ // To check, you either move freely a blocker or make a direct check.
+ if (Checks && (Pt == QUEEN || !(pos.blockers_for_king(~Us) & from)))
+ b &= pos.check_squares(Pt);
while (b)
- *moveList++ = make_move(from, pop_lsb(&b));
+ *moveList++ = make_move(from, pop_lsb(b));
}
return moveList;
static_assert(Type != LEGAL, "Unsupported type in generate_all()");
constexpr bool Checks = Type == QUIET_CHECKS; // Reduce template instantiations
- Bitboard target, piecesToMove = pos.pieces(Us);
-
- if(Type == QUIET_CHECKS)
- piecesToMove &= ~pos.blockers_for_king(~Us);
+ const Square ksq = pos.square<KING>(Us);
+ Bitboard target;
- switch (Type)
+ // Skip generating non-king moves when in double check
+ if (Type != EVASIONS || !more_than_one(pos.checkers()))
{
- case CAPTURES:
- target = pos.pieces(~Us);
- break;
- case QUIETS:
- case QUIET_CHECKS:
- target = ~pos.pieces();
- break;
- case EVASIONS:
- target = between_bb(pos.square<KING>(Us), lsb(pos.checkers())) | pos.checkers();
- break;
- case NON_EVASIONS:
- target = ~pos.pieces(Us);
- break;
+ target = Type == EVASIONS ? between_bb(ksq, lsb(pos.checkers()))
+ : Type == NON_EVASIONS ? ~pos.pieces( Us)
+ : Type == CAPTURES ? pos.pieces(~Us)
+ : ~pos.pieces( ); // QUIETS || QUIET_CHECKS
+
+ moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
+ moveList = generate_moves<Us, KNIGHT, Checks>(pos, moveList, target);
+ moveList = generate_moves<Us, BISHOP, Checks>(pos, moveList, target);
+ moveList = generate_moves<Us, ROOK, Checks>(pos, moveList, target);
+ moveList = generate_moves<Us, QUEEN, Checks>(pos, moveList, target);
}
- moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
- moveList = generate_moves<KNIGHT, Checks>(pos, moveList, piecesToMove, target);
- moveList = generate_moves<BISHOP, Checks>(pos, moveList, piecesToMove, target);
- moveList = generate_moves< ROOK, Checks>(pos, moveList, piecesToMove, target);
- moveList = generate_moves< QUEEN, Checks>(pos, moveList, piecesToMove, target);
-
- if (Type != QUIET_CHECKS && Type != EVASIONS)
+ if (!Checks || pos.blockers_for_king(~Us) & ksq)
{
- Square ksq = pos.square<KING>(Us);
- Bitboard b = attacks_bb<KING>(ksq) & target;
+ Bitboard b = attacks_bb<KING>(ksq) & (Type == EVASIONS ? ~pos.pieces(Us) : target);
+ if (Checks)
+ b &= ~attacks_bb<QUEEN>(pos.square<KING>(~Us));
+
while (b)
- *moveList++ = make_move(ksq, pop_lsb(&b));
+ *moveList++ = make_move(ksq, pop_lsb(b));
- if ((Type != CAPTURES) && pos.can_castle(Us & ANY_CASTLING))
+ if ((Type == QUIETS || Type == NON_EVASIONS) && pos.can_castle(Us & ANY_CASTLING))
for (CastlingRights cr : { Us & KING_SIDE, Us & QUEEN_SIDE } )
if (!pos.castling_impeded(cr) && pos.can_castle(cr))
*moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(cr));
} // namespace
-/// <CAPTURES> Generates all pseudo-legal captures plus queen and checking knight promotions
-/// <QUIETS> Generates all pseudo-legal non-captures and underpromotions (except checking knight)
+/// <CAPTURES> Generates all pseudo-legal captures plus queen promotions
+/// <QUIETS> Generates all pseudo-legal non-captures and underpromotions
+/// <EVASIONS> Generates all pseudo-legal check evasions when the side to move is in check
+/// <QUIET_CHECKS> Generates all pseudo-legal non-captures giving check, except castling and promotions
/// <NON_EVASIONS> Generates all pseudo-legal captures and non-captures
///
/// Returns a pointer to the end of the move list.
template<GenType Type>
ExtMove* generate(const Position& pos, ExtMove* moveList) {
- static_assert(Type == CAPTURES || Type == QUIETS || Type == NON_EVASIONS, "Unsupported type in generate()");
- assert(!pos.checkers());
+ static_assert(Type != LEGAL, "Unsupported type in generate()");
+ assert((Type == EVASIONS) == (bool)pos.checkers());
Color us = pos.side_to_move();
// Explicit template instantiations
template ExtMove* generate<CAPTURES>(const Position&, ExtMove*);
template ExtMove* generate<QUIETS>(const Position&, ExtMove*);
+template ExtMove* generate<EVASIONS>(const Position&, ExtMove*);
+template ExtMove* generate<QUIET_CHECKS>(const Position&, ExtMove*);
template ExtMove* generate<NON_EVASIONS>(const Position&, ExtMove*);
-/// generate<QUIET_CHECKS> generates all pseudo-legal non-captures giving check,
-/// except castling. Returns a pointer to the end of the move list.
-template<>
-ExtMove* generate<QUIET_CHECKS>(const Position& pos, ExtMove* moveList) {
-
- assert(!pos.checkers());
-
- Color us = pos.side_to_move();
- Bitboard dc = pos.blockers_for_king(~us) & pos.pieces(us) & ~pos.pieces(PAWN);
-
- while (dc)
- {
- Square from = pop_lsb(&dc);
- PieceType pt = type_of(pos.piece_on(from));
-
- Bitboard b = attacks_bb(pt, from, pos.pieces()) & ~pos.pieces();
-
- if (pt == KING)
- b &= ~attacks_bb<QUEEN>(pos.square<KING>(~us));
-
- while (b)
- *moveList++ = make_move(from, pop_lsb(&b));
- }
-
- return us == WHITE ? generate_all<WHITE, QUIET_CHECKS>(pos, moveList)
- : generate_all<BLACK, QUIET_CHECKS>(pos, moveList);
-}
-
-
-/// generate<EVASIONS> generates all pseudo-legal check evasions when the side
-/// to move is in check. Returns a pointer to the end of the move list.
-template<>
-ExtMove* generate<EVASIONS>(const Position& pos, ExtMove* moveList) {
-
- assert(pos.checkers());
-
- Color us = pos.side_to_move();
- Square ksq = pos.square<KING>(us);
- Bitboard sliderAttacks = 0;
- Bitboard sliders = pos.checkers() & ~pos.pieces(KNIGHT, PAWN);
-
- // Find all the squares attacked by slider checkers. We will remove them from
- // the king evasions in order to skip known illegal moves, which avoids any
- // useless legality checks later on.
- while (sliders)
- sliderAttacks |= line_bb(ksq, pop_lsb(&sliders)) & ~pos.checkers();
-
- // Generate evasions for king, capture and non capture moves
- Bitboard b = attacks_bb<KING>(ksq) & ~pos.pieces(us) & ~sliderAttacks;
- while (b)
- *moveList++ = make_move(ksq, pop_lsb(&b));
-
- if (more_than_one(pos.checkers()))
- return moveList; // Double check, only a king move can save the day
-
- // Generate blocking evasions or captures of the checking piece
- return us == WHITE ? generate_all<WHITE, EVASIONS>(pos, moveList)
- : generate_all<BLACK, EVASIONS>(pos, moveList);
-}
-
-
/// generate<LEGAL> generates all the legal moves in the given position
template<>
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-// Definition of input features and network structure used in NNUE evaluation function
-
-#ifndef NNUE_HALFKP_256X2_32_32_H_INCLUDED
-#define NNUE_HALFKP_256X2_32_32_H_INCLUDED
-
-#include "../features/feature_set.h"
-#include "../features/half_kp.h"
-
-#include "../layers/input_slice.h"
-#include "../layers/affine_transform.h"
-#include "../layers/clipped_relu.h"
-
-namespace Stockfish::Eval::NNUE {
-
-// Input features used in evaluation function
-using RawFeatures = Features::FeatureSet<
- Features::HalfKP<Features::Side::kFriend>>;
-
-// Number of input feature dimensions after conversion
-constexpr IndexType kTransformedFeatureDimensions = 256;
-
-namespace Layers {
-
-// Define network structure
-using InputLayer = InputSlice<kTransformedFeatureDimensions * 2>;
-using HiddenLayer1 = ClippedReLU<AffineTransform<InputLayer, 32>>;
-using HiddenLayer2 = ClippedReLU<AffineTransform<HiddenLayer1, 32>>;
-using OutputLayer = AffineTransform<HiddenLayer2, 1>;
-
-} // namespace Layers
-
-using Network = Layers::OutputLayer;
-
-} // namespace Stockfish::Eval::NNUE
-
-#endif // #ifndef NNUE_HALFKP_256X2_32_32_H_INCLUDED
#include <iostream>
#include <set>
+#include <sstream>
+#include <iomanip>
+#include <fstream>
#include "../evaluate.h"
#include "../position.h"
namespace Stockfish::Eval::NNUE {
// Input feature converter
- LargePagePtr<FeatureTransformer> feature_transformer;
+ LargePagePtr<FeatureTransformer> featureTransformer;
// Evaluation function
- AlignedPtr<Network> network;
+ AlignedPtr<Network> network[LayerStacks];
// Evaluation function file name
std::string fileName;
+ std::string netDescription;
namespace Detail {
// Initialize the evaluation function parameters
template <typename T>
- void Initialize(AlignedPtr<T>& pointer) {
+ void initialize(AlignedPtr<T>& pointer) {
pointer.reset(reinterpret_cast<T*>(std_aligned_alloc(alignof(T), sizeof(T))));
std::memset(pointer.get(), 0, sizeof(T));
}
template <typename T>
- void Initialize(LargePagePtr<T>& pointer) {
+ void initialize(LargePagePtr<T>& pointer) {
static_assert(alignof(T) <= 4096, "aligned_large_pages_alloc() may fail for such a big alignment requirement of T");
pointer.reset(reinterpret_cast<T*>(aligned_large_pages_alloc(sizeof(T))));
// Read evaluation function parameters
template <typename T>
- bool ReadParameters(std::istream& stream, T& reference) {
+ bool read_parameters(std::istream& stream, T& reference) {
std::uint32_t header;
header = read_little_endian<std::uint32_t>(stream);
- if (!stream || header != T::GetHashValue()) return false;
- return reference.ReadParameters(stream);
+ if (!stream || header != T::get_hash_value()) return false;
+ return reference.read_parameters(stream);
+ }
+
+ // Write evaluation function parameters
+ template <typename T>
+ bool write_parameters(std::ostream& stream, const T& reference) {
+
+ write_little_endian<std::uint32_t>(stream, T::get_hash_value());
+ return reference.write_parameters(stream);
}
} // namespace Detail
// Initialize the evaluation function parameters
- void Initialize() {
+ void initialize() {
- Detail::Initialize(feature_transformer);
- Detail::Initialize(network);
+ Detail::initialize(featureTransformer);
+ for (std::size_t i = 0; i < LayerStacks; ++i)
+ Detail::initialize(network[i]);
}
// Read network header
- bool ReadHeader(std::istream& stream, std::uint32_t* hash_value, std::string* architecture)
+ bool read_header(std::istream& stream, std::uint32_t* hashValue, std::string* desc)
{
std::uint32_t version, size;
version = read_little_endian<std::uint32_t>(stream);
- *hash_value = read_little_endian<std::uint32_t>(stream);
+ *hashValue = read_little_endian<std::uint32_t>(stream);
size = read_little_endian<std::uint32_t>(stream);
- if (!stream || version != kVersion) return false;
- architecture->resize(size);
- stream.read(&(*architecture)[0], size);
+ if (!stream || version != Version) return false;
+ desc->resize(size);
+ stream.read(&(*desc)[0], size);
+ return !stream.fail();
+ }
+
+ // Write network header
+ bool write_header(std::ostream& stream, std::uint32_t hashValue, const std::string& desc)
+ {
+ write_little_endian<std::uint32_t>(stream, Version);
+ write_little_endian<std::uint32_t>(stream, hashValue);
+ write_little_endian<std::uint32_t>(stream, desc.size());
+ stream.write(&desc[0], desc.size());
return !stream.fail();
}
// Read network parameters
- bool ReadParameters(std::istream& stream) {
-
- std::uint32_t hash_value;
- std::string architecture;
- if (!ReadHeader(stream, &hash_value, &architecture)) return false;
- if (hash_value != kHashValue) return false;
- if (!Detail::ReadParameters(stream, *feature_transformer)) return false;
- if (!Detail::ReadParameters(stream, *network)) return false;
+ bool read_parameters(std::istream& stream) {
+
+ std::uint32_t hashValue;
+ if (!read_header(stream, &hashValue, &netDescription)) return false;
+ if (hashValue != HashValue) return false;
+ if (!Detail::read_parameters(stream, *featureTransformer)) return false;
+ for (std::size_t i = 0; i < LayerStacks; ++i)
+ if (!Detail::read_parameters(stream, *(network[i]))) return false;
return stream && stream.peek() == std::ios::traits_type::eof();
}
+ // Write network parameters
+ bool write_parameters(std::ostream& stream) {
+
+ if (!write_header(stream, HashValue, netDescription)) return false;
+ if (!Detail::write_parameters(stream, *featureTransformer)) return false;
+ for (std::size_t i = 0; i < LayerStacks; ++i)
+ if (!Detail::write_parameters(stream, *(network[i]))) return false;
+ return (bool)stream;
+ }
+
// Evaluation function. Perform differential calculation.
- Value evaluate(const Position& pos) {
+ Value evaluate(const Position& pos, bool adjusted) {
// We manually align the arrays on the stack because with gcc < 9.3
// overaligning stack variables with alignas() doesn't work correctly.
- constexpr uint64_t alignment = kCacheLineSize;
+ constexpr uint64_t alignment = CacheLineSize;
#if defined(ALIGNAS_ON_STACK_VARIABLES_BROKEN)
- TransformedFeatureType transformed_features_unaligned[
- FeatureTransformer::kBufferSize + alignment / sizeof(TransformedFeatureType)];
- char buffer_unaligned[Network::kBufferSize + alignment];
+ TransformedFeatureType transformedFeaturesUnaligned[
+ FeatureTransformer::BufferSize + alignment / sizeof(TransformedFeatureType)];
+ char bufferUnaligned[Network::BufferSize + alignment];
- auto* transformed_features = align_ptr_up<alignment>(&transformed_features_unaligned[0]);
- auto* buffer = align_ptr_up<alignment>(&buffer_unaligned[0]);
+ auto* transformedFeatures = align_ptr_up<alignment>(&transformedFeaturesUnaligned[0]);
+ auto* buffer = align_ptr_up<alignment>(&bufferUnaligned[0]);
#else
alignas(alignment)
- TransformedFeatureType transformed_features[FeatureTransformer::kBufferSize];
- alignas(alignment) char buffer[Network::kBufferSize];
+ TransformedFeatureType transformedFeatures[FeatureTransformer::BufferSize];
+ alignas(alignment) char buffer[Network::BufferSize];
#endif
- ASSERT_ALIGNED(transformed_features, alignment);
+ ASSERT_ALIGNED(transformedFeatures, alignment);
ASSERT_ALIGNED(buffer, alignment);
- feature_transformer->Transform(pos, transformed_features);
- const auto output = network->Propagate(transformed_features, buffer);
+ const std::size_t bucket = (pos.count<ALL_PIECES>() - 1) / 4;
+ const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
+ const auto output = network[bucket]->propagate(transformedFeatures, buffer);
+
+ int materialist = psqt;
+ int positional = output[0];
+
+ int delta_npm = abs(pos.non_pawn_material(WHITE) - pos.non_pawn_material(BLACK));
+ int entertainment = (adjusted && delta_npm <= BishopValueMg - KnightValueMg ? 7 : 0);
+
+ int A = 128 - entertainment;
+ int B = 128 + entertainment;
+
+ int sum = (A * materialist + B * positional) / 128;
- return static_cast<Value>(output[0] / FV_SCALE);
+ return static_cast<Value>( sum / OutputScale );
}
+ struct NnueEvalTrace {
+ static_assert(LayerStacks == PSQTBuckets);
+
+ Value psqt[LayerStacks];
+ Value positional[LayerStacks];
+ std::size_t correctBucket;
+ };
+
+ static NnueEvalTrace trace_evaluate(const Position& pos) {
+
+ // We manually align the arrays on the stack because with gcc < 9.3
+ // overaligning stack variables with alignas() doesn't work correctly.
+
+ constexpr uint64_t alignment = CacheLineSize;
+
+#if defined(ALIGNAS_ON_STACK_VARIABLES_BROKEN)
+ TransformedFeatureType transformedFeaturesUnaligned[
+ FeatureTransformer::BufferSize + alignment / sizeof(TransformedFeatureType)];
+ char bufferUnaligned[Network::BufferSize + alignment];
+
+ auto* transformedFeatures = align_ptr_up<alignment>(&transformedFeaturesUnaligned[0]);
+ auto* buffer = align_ptr_up<alignment>(&bufferUnaligned[0]);
+#else
+ alignas(alignment)
+ TransformedFeatureType transformedFeatures[FeatureTransformer::BufferSize];
+ alignas(alignment) char buffer[Network::BufferSize];
+#endif
+
+ ASSERT_ALIGNED(transformedFeatures, alignment);
+ ASSERT_ALIGNED(buffer, alignment);
+
+ NnueEvalTrace t{};
+ t.correctBucket = (pos.count<ALL_PIECES>() - 1) / 4;
+ for (std::size_t bucket = 0; bucket < LayerStacks; ++bucket) {
+ const auto psqt = featureTransformer->transform(pos, transformedFeatures, bucket);
+ const auto output = network[bucket]->propagate(transformedFeatures, buffer);
+
+ int materialist = psqt;
+ int positional = output[0];
+
+ t.psqt[bucket] = static_cast<Value>( materialist / OutputScale );
+ t.positional[bucket] = static_cast<Value>( positional / OutputScale );
+ }
+
+ return t;
+ }
+
+ static const std::string PieceToChar(" PNBRQK pnbrqk");
+
+
+ // format_cp_compact() converts a Value into (centi)pawns and writes it in a buffer.
+ // The buffer must have capacity for at least 5 chars.
+ static void format_cp_compact(Value v, char* buffer) {
+
+ buffer[0] = (v < 0 ? '-' : v > 0 ? '+' : ' ');
+
+ int cp = std::abs(100 * v / PawnValueEg);
+ if (cp >= 10000)
+ {
+ buffer[1] = '0' + cp / 10000; cp %= 10000;
+ buffer[2] = '0' + cp / 1000; cp %= 1000;
+ buffer[3] = '0' + cp / 100; cp %= 100;
+ buffer[4] = ' ';
+ }
+ else if (cp >= 1000)
+ {
+ buffer[1] = '0' + cp / 1000; cp %= 1000;
+ buffer[2] = '0' + cp / 100; cp %= 100;
+ buffer[3] = '.';
+ buffer[4] = '0' + cp / 10;
+ }
+ else
+ {
+ buffer[1] = '0' + cp / 100; cp %= 100;
+ buffer[2] = '.';
+ buffer[3] = '0' + cp / 10; cp %= 10;
+ buffer[4] = '0' + cp / 1;
+ }
+ }
+
+
+ // format_cp_aligned_dot() converts a Value into (centi)pawns and writes it in a buffer,
+ // always keeping two decimals. The buffer must have capacity for at least 7 chars.
+ static void format_cp_aligned_dot(Value v, char* buffer) {
+
+ buffer[0] = (v < 0 ? '-' : v > 0 ? '+' : ' ');
+
+ double cp = 1.0 * std::abs(int(v)) / PawnValueEg;
+ sprintf(&buffer[1], "%6.2f", cp);
+ }
+
+
+ // trace() returns a string with the value of each piece on a board,
+ // and a table for (PSQT, Layers) values bucket by bucket.
+
+ std::string trace(Position& pos) {
+
+ std::stringstream ss;
+
+ char board[3*8+1][8*8+2];
+ std::memset(board, ' ', sizeof(board));
+ for (int row = 0; row < 3*8+1; ++row)
+ board[row][8*8+1] = '\0';
+
+ // A lambda to output one box of the board
+ auto writeSquare = [&board](File file, Rank rank, Piece pc, Value value) {
+
+ const int x = ((int)file) * 8;
+ const int y = (7 - (int)rank) * 3;
+ for (int i = 1; i < 8; ++i)
+ board[y][x+i] = board[y+3][x+i] = '-';
+ for (int i = 1; i < 3; ++i)
+ board[y+i][x] = board[y+i][x+8] = '|';
+ board[y][x] = board[y][x+8] = board[y+3][x+8] = board[y+3][x] = '+';
+ if (pc != NO_PIECE)
+ board[y+1][x+4] = PieceToChar[pc];
+ if (value != VALUE_NONE)
+ format_cp_compact(value, &board[y+2][x+2]);
+ };
+
+ // We estimate the value of each piece by doing a differential evaluation from
+ // the current base eval, simulating the removal of the piece from its square.
+ Value base = evaluate(pos);
+ base = pos.side_to_move() == WHITE ? base : -base;
+
+ for (File f = FILE_A; f <= FILE_H; ++f)
+ for (Rank r = RANK_1; r <= RANK_8; ++r)
+ {
+ Square sq = make_square(f, r);
+ Piece pc = pos.piece_on(sq);
+ Value v = VALUE_NONE;
+
+ if (pc != NO_PIECE && type_of(pc) != KING)
+ {
+ auto st = pos.state();
+
+ pos.remove_piece(sq);
+ st->accumulator.computed[WHITE] = false;
+ st->accumulator.computed[BLACK] = false;
+
+ Value eval = evaluate(pos);
+ eval = pos.side_to_move() == WHITE ? eval : -eval;
+ v = base - eval;
+
+ pos.put_piece(pc, sq);
+ st->accumulator.computed[WHITE] = false;
+ st->accumulator.computed[BLACK] = false;
+ }
+
+ writeSquare(f, r, pc, v);
+ }
+
+ ss << " NNUE derived piece values:\n";
+ for (int row = 0; row < 3*8+1; ++row)
+ ss << board[row] << '\n';
+ ss << '\n';
+
+ auto t = trace_evaluate(pos);
+
+ ss << " NNUE network contributions "
+ << (pos.side_to_move() == WHITE ? "(White to move)" : "(Black to move)") << std::endl
+ << "+------------+------------+------------+------------+\n"
+ << "| Bucket | Material | Positional | Total |\n"
+ << "| | (PSQT) | (Layers) | |\n"
+ << "+------------+------------+------------+------------+\n";
+
+ for (std::size_t bucket = 0; bucket < LayerStacks; ++bucket)
+ {
+ char buffer[3][8];
+ std::memset(buffer, '\0', sizeof(buffer));
+
+ format_cp_aligned_dot(t.psqt[bucket], buffer[0]);
+ format_cp_aligned_dot(t.positional[bucket], buffer[1]);
+ format_cp_aligned_dot(t.psqt[bucket] + t.positional[bucket], buffer[2]);
+
+ ss << "| " << bucket << " "
+ << " | " << buffer[0] << " "
+ << " | " << buffer[1] << " "
+ << " | " << buffer[2] << " "
+ << " |";
+ if (bucket == t.correctBucket)
+ ss << " <-- this bucket is used";
+ ss << '\n';
+ }
+
+ ss << "+------------+------------+------------+------------+\n";
+
+ return ss.str();
+ }
+
+
// Load eval, from a file stream or a memory stream
bool load_eval(std::string name, std::istream& stream) {
- Initialize();
+ initialize();
fileName = name;
- return ReadParameters(stream);
+ return read_parameters(stream);
+ }
+
+ // Save eval, to a file stream or a memory stream
+ bool save_eval(std::ostream& stream) {
+
+ if (fileName.empty())
+ return false;
+
+ return write_parameters(stream);
+ }
+
+ /// Save eval, to a file given by its name
+ bool save_eval(const std::optional<std::string>& filename) {
+
+ std::string actualFilename;
+ std::string msg;
+
+ if (filename.has_value())
+ actualFilename = filename.value();
+ else
+ {
+ if (eval_file_loaded != EvalFileDefaultName)
+ {
+ msg = "Failed to export a net. A non-embedded net can only be saved if the filename is specified";
+
+ sync_cout << msg << sync_endl;
+ return false;
+ }
+ actualFilename = EvalFileDefaultName;
+ }
+
+ std::ofstream stream(actualFilename, std::ios_base::binary);
+ bool saved = save_eval(stream);
+
+ msg = saved ? "Network saved successfully to " + actualFilename
+ : "Failed to export a net";
+
+ sync_cout << msg << sync_endl;
+ return saved;
}
+
} // namespace Stockfish::Eval::NNUE
namespace Stockfish::Eval::NNUE {
// Hash value of evaluation function structure
- constexpr std::uint32_t kHashValue =
- FeatureTransformer::GetHashValue() ^ Network::GetHashValue();
+ constexpr std::uint32_t HashValue =
+ FeatureTransformer::get_hash_value() ^ Network::get_hash_value();
// Deleter for automating release of memory area
template <typename T>
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-// A class template that represents the input feature set of the NNUE evaluation function
-
-#ifndef NNUE_FEATURE_SET_H_INCLUDED
-#define NNUE_FEATURE_SET_H_INCLUDED
-
-#include "features_common.h"
-#include <array>
-
-namespace Stockfish::Eval::NNUE::Features {
-
- // Class template that represents a list of values
- template <typename T, T... Values>
- struct CompileTimeList;
-
- template <typename T, T First, T... Remaining>
- struct CompileTimeList<T, First, Remaining...> {
- static constexpr bool Contains(T value) {
- return value == First || CompileTimeList<T, Remaining...>::Contains(value);
- }
- static constexpr std::array<T, sizeof...(Remaining) + 1>
- kValues = {{First, Remaining...}};
- };
-
- // Base class of feature set
- template <typename Derived>
- class FeatureSetBase {
-
- };
-
- // Class template that represents the feature set
- template <typename FeatureType>
- class FeatureSet<FeatureType> : public FeatureSetBase<FeatureSet<FeatureType>> {
-
- public:
- // Hash value embedded in the evaluation file
- static constexpr std::uint32_t kHashValue = FeatureType::kHashValue;
- // Number of feature dimensions
- static constexpr IndexType kDimensions = FeatureType::kDimensions;
- // Maximum number of simultaneously active features
- static constexpr IndexType kMaxActiveDimensions =
- FeatureType::kMaxActiveDimensions;
- // Trigger for full calculation instead of difference calculation
- using SortedTriggerSet =
- CompileTimeList<TriggerEvent, FeatureType::kRefreshTrigger>;
- static constexpr auto kRefreshTriggers = SortedTriggerSet::kValues;
-
- };
-
-} // namespace Stockfish::Eval::NNUE::Features
-
-#endif // #ifndef NNUE_FEATURE_SET_H_INCLUDED
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-//Common header of input features of NNUE evaluation function
-
-#ifndef NNUE_FEATURES_COMMON_H_INCLUDED
-#define NNUE_FEATURES_COMMON_H_INCLUDED
-
-#include "../../evaluate.h"
-#include "../nnue_common.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
- class IndexList;
-
- template <typename... FeatureTypes>
- class FeatureSet;
-
- // Trigger to perform full calculations instead of difference only
- enum class TriggerEvent {
- kFriendKingMoved // calculate full evaluation when own king moves
- };
-
- enum class Side {
- kFriend // side to move
- };
-
-} // namespace Stockfish::Eval::NNUE::Features
-
-#endif // #ifndef NNUE_FEATURES_COMMON_H_INCLUDED
--- /dev/null
+/*
+ Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+ Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+
+ Stockfish is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Stockfish is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//Definition of input features HalfKAv2 of NNUE evaluation function
+
+#include "half_ka_v2.h"
+
+#include "../../position.h"
+
+namespace Stockfish::Eval::NNUE::Features {
+
+ // Orient a square according to perspective (rotates by 180 for black)
+ inline Square HalfKAv2::orient(Color perspective, Square s) {
+ return Square(int(s) ^ (bool(perspective) * 56));
+ }
+
+ // Index of a feature for a given king position and another piece on some square
+ inline IndexType HalfKAv2::make_index(Color perspective, Square s, Piece pc, Square ksq) {
+ return IndexType(orient(perspective, s) + PieceSquareIndex[perspective][pc] + PS_NB * ksq);
+ }
+
+ // Get a list of indices for active features
+ void HalfKAv2::append_active_indices(
+ const Position& pos,
+ Color perspective,
+ ValueListInserter<IndexType> active
+ ) {
+ Square ksq = orient(perspective, pos.square<KING>(perspective));
+ Bitboard bb = pos.pieces();
+ while (bb)
+ {
+ Square s = pop_lsb(bb);
+ active.push_back(make_index(perspective, s, pos.piece_on(s), ksq));
+ }
+ }
+
+
+ // append_changed_indices() : get a list of indices for recently changed features
+
+ void HalfKAv2::append_changed_indices(
+ Square ksq,
+ StateInfo* st,
+ Color perspective,
+ ValueListInserter<IndexType> removed,
+ ValueListInserter<IndexType> added
+ ) {
+ const auto& dp = st->dirtyPiece;
+ Square oriented_ksq = orient(perspective, ksq);
+ for (int i = 0; i < dp.dirty_num; ++i) {
+ Piece pc = dp.piece[i];
+ if (dp.from[i] != SQ_NONE)
+ removed.push_back(make_index(perspective, dp.from[i], pc, oriented_ksq));
+ if (dp.to[i] != SQ_NONE)
+ added.push_back(make_index(perspective, dp.to[i], pc, oriented_ksq));
+ }
+ }
+
+ int HalfKAv2::update_cost(StateInfo* st) {
+ return st->dirtyPiece.dirty_num;
+ }
+
+ int HalfKAv2::refresh_cost(const Position& pos) {
+ return pos.count<ALL_PIECES>();
+ }
+
+ bool HalfKAv2::requires_refresh(StateInfo* st, Color perspective) {
+ return st->dirtyPiece.piece[0] == make_piece(perspective, KING);
+ }
+
+} // namespace Stockfish::Eval::NNUE::Features
--- /dev/null
+/*
+ Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+ Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
+
+ Stockfish is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Stockfish is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//Definition of input features HalfKP of NNUE evaluation function
+
+#ifndef NNUE_FEATURES_HALF_KA_V2_H_INCLUDED
+#define NNUE_FEATURES_HALF_KA_V2_H_INCLUDED
+
+#include "../nnue_common.h"
+
+#include "../../evaluate.h"
+#include "../../misc.h"
+
+namespace Stockfish {
+ struct StateInfo;
+}
+
+namespace Stockfish::Eval::NNUE::Features {
+
+ // Feature HalfKAv2: Combination of the position of own king
+ // and the position of pieces
+ class HalfKAv2 {
+
+ // unique number for each piece type on each square
+ enum {
+ PS_NONE = 0,
+ PS_W_PAWN = 0,
+ PS_B_PAWN = 1 * SQUARE_NB,
+ PS_W_KNIGHT = 2 * SQUARE_NB,
+ PS_B_KNIGHT = 3 * SQUARE_NB,
+ PS_W_BISHOP = 4 * SQUARE_NB,
+ PS_B_BISHOP = 5 * SQUARE_NB,
+ PS_W_ROOK = 6 * SQUARE_NB,
+ PS_B_ROOK = 7 * SQUARE_NB,
+ PS_W_QUEEN = 8 * SQUARE_NB,
+ PS_B_QUEEN = 9 * SQUARE_NB,
+ PS_KING = 10 * SQUARE_NB,
+ PS_NB = 11 * SQUARE_NB
+ };
+
+ static constexpr IndexType PieceSquareIndex[COLOR_NB][PIECE_NB] = {
+ // convention: W - us, B - them
+ // viewed from other side, W and B are reversed
+ { PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_KING, PS_NONE,
+ PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_KING, PS_NONE },
+ { PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_KING, PS_NONE,
+ PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_KING, PS_NONE }
+ };
+
+ // Orient a square according to perspective (rotates by 180 for black)
+ static Square orient(Color perspective, Square s);
+
+ // Index of a feature for a given king position and another piece on some square
+ static IndexType make_index(Color perspective, Square s, Piece pc, Square ksq);
+
+ public:
+ // Feature name
+ static constexpr const char* Name = "HalfKAv2(Friend)";
+
+ // Hash value embedded in the evaluation file
+ static constexpr std::uint32_t HashValue = 0x5f234cb8u;
+
+ // Number of feature dimensions
+ static constexpr IndexType Dimensions =
+ static_cast<IndexType>(SQUARE_NB) * static_cast<IndexType>(PS_NB);
+
+ // Maximum number of simultaneously active features.
+ static constexpr IndexType MaxActiveDimensions = 32;
+
+ // Get a list of indices for active features
+ static void append_active_indices(
+ const Position& pos,
+ Color perspective,
+ ValueListInserter<IndexType> active);
+
+ // Get a list of indices for recently changed features
+ static void append_changed_indices(
+ Square ksq,
+ StateInfo* st,
+ Color perspective,
+ ValueListInserter<IndexType> removed,
+ ValueListInserter<IndexType> added);
+
+ // Returns the cost of updating one perspective, the most costly one.
+ // Assumes no refresh needed.
+ static int update_cost(StateInfo* st);
+ static int refresh_cost(const Position& pos);
+
+ // Returns whether the change stored in this StateInfo means that
+ // a full accumulator refresh is required.
+ static bool requires_refresh(StateInfo* st, Color perspective);
+ };
+
+} // namespace Stockfish::Eval::NNUE::Features
+
+#endif // #ifndef NNUE_FEATURES_HALF_KA_V2_H_INCLUDED
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-//Definition of input features HalfKP of NNUE evaluation function
-
-#include "half_kp.h"
-#include "index_list.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
- // Orient a square according to perspective (rotates by 180 for black)
- inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
- }
-
- // Index of a feature for a given king position and another piece on some square
- inline IndexType make_index(Color perspective, Square s, Piece pc, Square ksq) {
- return IndexType(orient(perspective, s) + kpp_board_index[perspective][pc] + PS_END * ksq);
- }
-
- // Get a list of indices for active features
- template <Side AssociatedKing>
- void HalfKP<AssociatedKing>::AppendActiveIndices(
- const Position& pos, Color perspective, IndexList* active) {
-
- Square ksq = orient(perspective, pos.square<KING>(perspective));
- Bitboard bb = pos.pieces() & ~pos.pieces(KING);
- while (bb) {
- Square s = pop_lsb(&bb);
- active->push_back(make_index(perspective, s, pos.piece_on(s), ksq));
- }
- }
-
- // Get a list of indices for recently changed features
- template <Side AssociatedKing>
- void HalfKP<AssociatedKing>::AppendChangedIndices(
- const Position& pos, const DirtyPiece& dp, Color perspective,
- IndexList* removed, IndexList* added) {
-
- Square ksq = orient(perspective, pos.square<KING>(perspective));
- for (int i = 0; i < dp.dirty_num; ++i) {
- Piece pc = dp.piece[i];
- if (type_of(pc) == KING) continue;
- if (dp.from[i] != SQ_NONE)
- removed->push_back(make_index(perspective, dp.from[i], pc, ksq));
- if (dp.to[i] != SQ_NONE)
- added->push_back(make_index(perspective, dp.to[i], pc, ksq));
- }
- }
-
- template class HalfKP<Side::kFriend>;
-
-} // namespace Stockfish::Eval::NNUE::Features
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-//Definition of input features HalfKP of NNUE evaluation function
-
-#ifndef NNUE_FEATURES_HALF_KP_H_INCLUDED
-#define NNUE_FEATURES_HALF_KP_H_INCLUDED
-
-#include "../../evaluate.h"
-#include "features_common.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
- // Feature HalfKP: Combination of the position of own king
- // and the position of pieces other than kings
- template <Side AssociatedKing>
- class HalfKP {
-
- public:
- // Feature name
- static constexpr const char* kName = "HalfKP(Friend)";
- // Hash value embedded in the evaluation file
- static constexpr std::uint32_t kHashValue =
- 0x5D69D5B9u ^ (AssociatedKing == Side::kFriend);
- // Number of feature dimensions
- static constexpr IndexType kDimensions =
- static_cast<IndexType>(SQUARE_NB) * static_cast<IndexType>(PS_END);
- // Maximum number of simultaneously active features
- static constexpr IndexType kMaxActiveDimensions = 30; // Kings don't count
- // Trigger for full calculation instead of difference calculation
- static constexpr TriggerEvent kRefreshTrigger = TriggerEvent::kFriendKingMoved;
-
- // Get a list of indices for active features
- static void AppendActiveIndices(const Position& pos, Color perspective,
- IndexList* active);
-
- // Get a list of indices for recently changed features
- static void AppendChangedIndices(const Position& pos, const DirtyPiece& dp, Color perspective,
- IndexList* removed, IndexList* added);
- };
-
-} // namespace Stockfish::Eval::NNUE::Features
-
-#endif // #ifndef NNUE_FEATURES_HALF_KP_H_INCLUDED
+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2021 The Stockfish developers (see AUTHORS file)
-
- Stockfish is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-// Definition of index list of input features
-
-#ifndef NNUE_FEATURES_INDEX_LIST_H_INCLUDED
-#define NNUE_FEATURES_INDEX_LIST_H_INCLUDED
-
-#include "../../position.h"
-#include "../nnue_architecture.h"
-
-namespace Stockfish::Eval::NNUE::Features {
-
- // Class template used for feature index list
- template <typename T, std::size_t MaxSize>
- class ValueList {
-
- public:
- std::size_t size() const { return size_; }
- void resize(std::size_t size) { size_ = size; }
- void push_back(const T& value) { values_[size_++] = value; }
- T& operator[](std::size_t index) { return values_[index]; }
- T* begin() { return values_; }
- T* end() { return values_ + size_; }
- const T& operator[](std::size_t index) const { return values_[index]; }
- const T* begin() const { return values_; }
- const T* end() const { return values_ + size_; }
-
- void swap(ValueList& other) {
- const std::size_t max_size = std::max(size_, other.size_);
- for (std::size_t i = 0; i < max_size; ++i) {
- std::swap(values_[i], other.values_[i]);
- }
- std::swap(size_, other.size_);
- }
-
- private:
- T values_[MaxSize];
- std::size_t size_ = 0;
- };
-
- //Type of feature index list
- class IndexList
- : public ValueList<IndexType, RawFeatures::kMaxActiveDimensions> {
- };
-
-} // namespace Stockfish::Eval::NNUE::Features
-
-#endif // NNUE_FEATURES_INDEX_LIST_H_INCLUDED
namespace Stockfish::Eval::NNUE::Layers {
// Affine transformation layer
- template <typename PreviousLayer, IndexType OutputDimensions>
+ template <typename PreviousLayer, IndexType OutDims>
class AffineTransform {
public:
// Input/output type
static_assert(std::is_same<InputType, std::uint8_t>::value, "");
// Number of input/output dimensions
- static constexpr IndexType kInputDimensions =
- PreviousLayer::kOutputDimensions;
- static constexpr IndexType kOutputDimensions = OutputDimensions;
- static constexpr IndexType kPaddedInputDimensions =
- CeilToMultiple<IndexType>(kInputDimensions, kMaxSimdWidth);
+ static constexpr IndexType InputDimensions =
+ PreviousLayer::OutputDimensions;
+ static constexpr IndexType OutputDimensions = OutDims;
+ static constexpr IndexType PaddedInputDimensions =
+ ceil_to_multiple<IndexType>(InputDimensions, MaxSimdWidth);
#if defined (USE_AVX512)
- static constexpr const IndexType kOutputSimdWidth = kSimdWidth / 2;
+ static constexpr const IndexType OutputSimdWidth = SimdWidth / 2;
#elif defined (USE_SSSE3)
- static constexpr const IndexType kOutputSimdWidth = kSimdWidth / 4;
+ static constexpr const IndexType OutputSimdWidth = SimdWidth / 4;
#endif
// Size of forward propagation buffer used in this layer
- static constexpr std::size_t kSelfBufferSize =
- CeilToMultiple(kOutputDimensions * sizeof(OutputType), kCacheLineSize);
+ static constexpr std::size_t SelfBufferSize =
+ ceil_to_multiple(OutputDimensions * sizeof(OutputType), CacheLineSize);
// Size of the forward propagation buffer used from the input layer to this layer
- static constexpr std::size_t kBufferSize =
- PreviousLayer::kBufferSize + kSelfBufferSize;
+ static constexpr std::size_t BufferSize =
+ PreviousLayer::BufferSize + SelfBufferSize;
// Hash value embedded in the evaluation file
- static constexpr std::uint32_t GetHashValue() {
- std::uint32_t hash_value = 0xCC03DAE4u;
- hash_value += kOutputDimensions;
- hash_value ^= PreviousLayer::GetHashValue() >> 1;
- hash_value ^= PreviousLayer::GetHashValue() << 31;
- return hash_value;
+ static constexpr std::uint32_t get_hash_value() {
+ std::uint32_t hashValue = 0xCC03DAE4u;
+ hashValue += OutputDimensions;
+ hashValue ^= PreviousLayer::get_hash_value() >> 1;
+ hashValue ^= PreviousLayer::get_hash_value() << 31;
+ return hashValue;
}
- // Read network parameters
- bool ReadParameters(std::istream& stream) {
- if (!previous_layer_.ReadParameters(stream)) return false;
- for (std::size_t i = 0; i < kOutputDimensions; ++i)
- biases_[i] = read_little_endian<BiasType>(stream);
- for (std::size_t i = 0; i < kOutputDimensions * kPaddedInputDimensions; ++i)
+ // Read network parameters
+ bool read_parameters(std::istream& stream) {
+ if (!previousLayer.read_parameters(stream)) return false;
+ for (std::size_t i = 0; i < OutputDimensions; ++i)
+ biases[i] = read_little_endian<BiasType>(stream);
+ for (std::size_t i = 0; i < OutputDimensions * PaddedInputDimensions; ++i)
#if !defined (USE_SSSE3)
- weights_[i] = read_little_endian<WeightType>(stream);
+ weights[i] = read_little_endian<WeightType>(stream);
#else
- weights_[
- (i / 4) % (kPaddedInputDimensions / 4) * kOutputDimensions * 4 +
- i / kPaddedInputDimensions * 4 +
+ weights[
+ (i / 4) % (PaddedInputDimensions / 4) * OutputDimensions * 4 +
+ i / PaddedInputDimensions * 4 +
i % 4
] = read_little_endian<WeightType>(stream);
-
- // Determine if eights of weight and input products can be summed using 16bits
- // without saturation. We assume worst case combinations of 0 and 127 for all inputs.
- if (kOutputDimensions > 1 && !stream.fail())
- {
- canSaturate16.count = 0;
-#if !defined(USE_VNNI)
- for (IndexType i = 0; i < kPaddedInputDimensions; i += 16)
- for (IndexType j = 0; j < kOutputDimensions; ++j)
- for (int x = 0; x < 2; ++x)
- {
- WeightType* w = &weights_[i * kOutputDimensions + j * 4 + x * 2];
- int sum[2] = {0, 0};
- for (int k = 0; k < 8; ++k)
- {
- IndexType idx = k / 2 * kOutputDimensions * 4 + k % 2;
- sum[w[idx] < 0] += w[idx];
- }
- for (int sign : {-1, 1})
- while (sign * sum[sign == -1] > 258)
- {
- int maxK = 0, maxW = 0;
- for (int k = 0; k < 8; ++k)
- {
- IndexType idx = k / 2 * kOutputDimensions * 4 + k % 2;
- if (maxW < sign * w[idx])
- maxK = k, maxW = sign * w[idx];
- }
-
- IndexType idx = maxK / 2 * kOutputDimensions * 4 + maxK % 2;
- sum[sign == -1] -= w[idx];
- canSaturate16.add(j, i + maxK / 2 * 4 + maxK % 2 + x * 2, w[idx]);
- w[idx] = 0;
- }
- }
-
- // Non functional optimization for faster more linear access
- std::sort(canSaturate16.ids, canSaturate16.ids + canSaturate16.count,
- [](const typename CanSaturate::Entry& e1, const typename CanSaturate::Entry& e2)
- { return e1.in == e2.in ? e1.out < e2.out : e1.in < e2.in; });
#endif
+
+ return !stream.fail();
+ }
+
+ // Write network parameters
+ bool write_parameters(std::ostream& stream) const {
+ if (!previousLayer.write_parameters(stream)) return false;
+ for (std::size_t i = 0; i < OutputDimensions; ++i)
+ write_little_endian<BiasType>(stream, biases[i]);
+#if !defined (USE_SSSE3)
+ for (std::size_t i = 0; i < OutputDimensions * PaddedInputDimensions; ++i)
+ write_little_endian<WeightType>(stream, weights[i]);
+#else
+ std::unique_ptr<WeightType[]> unscrambledWeights = std::make_unique<WeightType[]>(OutputDimensions * PaddedInputDimensions);
+ for (std::size_t i = 0; i < OutputDimensions * PaddedInputDimensions; ++i) {
+ unscrambledWeights[i] =
+ weights[
+ (i / 4) % (PaddedInputDimensions / 4) * OutputDimensions * 4 +
+ i / PaddedInputDimensions * 4 +
+ i % 4
+ ];
}
+
+ for (std::size_t i = 0; i < OutputDimensions * PaddedInputDimensions; ++i)
+ write_little_endian<WeightType>(stream, unscrambledWeights[i]);
#endif
return !stream.fail();
}
// Forward propagation
- const OutputType* Propagate(
- const TransformedFeatureType* transformed_features, char* buffer) const {
- const auto input = previous_layer_.Propagate(
- transformed_features, buffer + kSelfBufferSize);
+ const OutputType* propagate(
+ const TransformedFeatureType* transformedFeatures, char* buffer) const {
+ const auto input = previousLayer.propagate(
+ transformedFeatures, buffer + SelfBufferSize);
#if defined (USE_AVX512)
- [[maybe_unused]] const __m512i kOnes512 = _mm512_set1_epi16(1);
+ [[maybe_unused]] const __m512i Ones512 = _mm512_set1_epi16(1);
[[maybe_unused]] auto m512_hadd = [](__m512i sum, int bias) -> int {
return _mm512_reduce_add_epi32(sum) + bias;
acc = _mm512_dpbusd_epi32(acc, a, b);
#else
__m512i product0 = _mm512_maddubs_epi16(a, b);
- product0 = _mm512_madd_epi16(product0, kOnes512);
+ product0 = _mm512_madd_epi16(product0, Ones512);
acc = _mm512_add_epi32(acc, product0);
#endif
};
__m512i product1 = _mm512_maddubs_epi16(a1, b1);
__m512i product2 = _mm512_maddubs_epi16(a2, b2);
__m512i product3 = _mm512_maddubs_epi16(a3, b3);
- product0 = _mm512_add_epi16(product0, product1);
- product2 = _mm512_add_epi16(product2, product3);
- product0 = _mm512_add_epi16(product0, product2);
- product0 = _mm512_madd_epi16(product0, kOnes512);
- acc = _mm512_add_epi32(acc, product0);
+ product0 = _mm512_adds_epi16(product0, product1);
+ product0 = _mm512_madd_epi16(product0, Ones512);
+ product2 = _mm512_adds_epi16(product2, product3);
+ product2 = _mm512_madd_epi16(product2, Ones512);
+ acc = _mm512_add_epi32(acc, _mm512_add_epi32(product0, product2));
#endif
};
#endif
#if defined (USE_AVX2)
- [[maybe_unused]] const __m256i kOnes256 = _mm256_set1_epi16(1);
+ [[maybe_unused]] const __m256i Ones256 = _mm256_set1_epi16(1);
[[maybe_unused]] auto m256_hadd = [](__m256i sum, int bias) -> int {
__m128i sum128 = _mm_add_epi32(_mm256_castsi256_si128(sum), _mm256_extracti128_si256(sum, 1));
acc = _mm256_dpbusd_epi32(acc, a, b);
#else
__m256i product0 = _mm256_maddubs_epi16(a, b);
- product0 = _mm256_madd_epi16(product0, kOnes256);
+ product0 = _mm256_madd_epi16(product0, Ones256);
acc = _mm256_add_epi32(acc, product0);
#endif
};
__m256i product1 = _mm256_maddubs_epi16(a1, b1);
__m256i product2 = _mm256_maddubs_epi16(a2, b2);
__m256i product3 = _mm256_maddubs_epi16(a3, b3);
- product0 = _mm256_add_epi16(product0, product1);
- product2 = _mm256_add_epi16(product2, product3);
- product0 = _mm256_add_epi16(product0, product2);
- product0 = _mm256_madd_epi16(product0, kOnes256);
- acc = _mm256_add_epi32(acc, product0);
+ product0 = _mm256_adds_epi16(product0, product1);
+ product0 = _mm256_madd_epi16(product0, Ones256);
+ product2 = _mm256_adds_epi16(product2, product3);
+ product2 = _mm256_madd_epi16(product2, Ones256);
+ acc = _mm256_add_epi32(acc, _mm256_add_epi32(product0, product2));
#endif
};
#endif
#if defined (USE_SSSE3)
- [[maybe_unused]] const __m128i kOnes128 = _mm_set1_epi16(1);
+ [[maybe_unused]] const __m128i Ones128 = _mm_set1_epi16(1);
[[maybe_unused]] auto m128_hadd = [](__m128i sum, int bias) -> int {
sum = _mm_add_epi32(sum, _mm_shuffle_epi32(sum, 0x4E)); //_MM_PERM_BADC
[[maybe_unused]] auto m128_add_dpbusd_epi32 = [=](__m128i& acc, __m128i a, __m128i b) {
__m128i product0 = _mm_maddubs_epi16(a, b);
- product0 = _mm_madd_epi16(product0, kOnes128);
+ product0 = _mm_madd_epi16(product0, Ones128);
acc = _mm_add_epi32(acc, product0);
};
__m128i product2 = _mm_maddubs_epi16(a2, b2);
__m128i product3 = _mm_maddubs_epi16(a3, b3);
product0 = _mm_adds_epi16(product0, product1);
+ product0 = _mm_madd_epi16(product0, Ones128);
product2 = _mm_adds_epi16(product2, product3);
- product0 = _mm_adds_epi16(product0, product2);
- product0 = _mm_madd_epi16(product0, kOnes128);
- acc = _mm_add_epi32(acc, product0);
+ product2 = _mm_madd_epi16(product2, Ones128);
+ acc = _mm_add_epi32(acc, _mm_add_epi32(product0, product2));
};
#endif
#endif
#if defined (USE_SSSE3)
+ // Different layout, we process 4 inputs at a time, always.
+ static_assert(InputDimensions % 4 == 0);
const auto output = reinterpret_cast<OutputType*>(buffer);
- const auto input_vector = reinterpret_cast<const vec_t*>(input);
+ const auto inputVector = reinterpret_cast<const vec_t*>(input);
- static_assert(kOutputDimensions % kOutputSimdWidth == 0 || kOutputDimensions == 1);
+ static_assert(OutputDimensions % OutputSimdWidth == 0 || OutputDimensions == 1);
- // kOutputDimensions is either 1 or a multiple of kSimdWidth
+ // OutputDimensions is either 1 or a multiple of SimdWidth
// because then it is also an input dimension.
- if constexpr (kOutputDimensions % kOutputSimdWidth == 0)
+ if constexpr (OutputDimensions % OutputSimdWidth == 0)
{
- constexpr IndexType kNumChunks = kPaddedInputDimensions / 4;
+ constexpr IndexType NumChunks = InputDimensions / 4;
const auto input32 = reinterpret_cast<const std::int32_t*>(input);
vec_t* outptr = reinterpret_cast<vec_t*>(output);
- std::memcpy(output, biases_, kOutputDimensions * sizeof(OutputType));
+ std::memcpy(output, biases, OutputDimensions * sizeof(OutputType));
- for (int i = 0; i < (int)kNumChunks - 3; i += 4)
+ for (int i = 0; i < (int)NumChunks - 3; i += 4)
{
const vec_t in0 = vec_set_32(input32[i + 0]);
const vec_t in1 = vec_set_32(input32[i + 1]);
const vec_t in2 = vec_set_32(input32[i + 2]);
const vec_t in3 = vec_set_32(input32[i + 3]);
- const auto col0 = reinterpret_cast<const vec_t*>(&weights_[(i + 0) * kOutputDimensions * 4]);
- const auto col1 = reinterpret_cast<const vec_t*>(&weights_[(i + 1) * kOutputDimensions * 4]);
- const auto col2 = reinterpret_cast<const vec_t*>(&weights_[(i + 2) * kOutputDimensions * 4]);
- const auto col3 = reinterpret_cast<const vec_t*>(&weights_[(i + 3) * kOutputDimensions * 4]);
- for (int j = 0; j * kOutputSimdWidth < kOutputDimensions; ++j)
+ const auto col0 = reinterpret_cast<const vec_t*>(&weights[(i + 0) * OutputDimensions * 4]);
+ const auto col1 = reinterpret_cast<const vec_t*>(&weights[(i + 1) * OutputDimensions * 4]);
+ const auto col2 = reinterpret_cast<const vec_t*>(&weights[(i + 2) * OutputDimensions * 4]);
+ const auto col3 = reinterpret_cast<const vec_t*>(&weights[(i + 3) * OutputDimensions * 4]);
+ for (int j = 0; j * OutputSimdWidth < OutputDimensions; ++j)
vec_add_dpbusd_32x4(outptr[j], in0, col0[j], in1, col1[j], in2, col2[j], in3, col3[j]);
}
- for (int i = 0; i < canSaturate16.count; ++i)
- output[canSaturate16.ids[i].out] += input[canSaturate16.ids[i].in] * canSaturate16.ids[i].w;
}
- else if constexpr (kOutputDimensions == 1)
+ else if constexpr (OutputDimensions == 1)
{
#if defined (USE_AVX512)
- if constexpr (kPaddedInputDimensions % (kSimdWidth * 2) != 0)
+ if constexpr (PaddedInputDimensions % (SimdWidth * 2) != 0)
{
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
- const auto input_vector256 = reinterpret_cast<const __m256i*>(input);
+ constexpr IndexType NumChunks = PaddedInputDimensions / SimdWidth;
+ const auto inputVector256 = reinterpret_cast<const __m256i*>(input);
__m256i sum0 = _mm256_setzero_si256();
- const auto row0 = reinterpret_cast<const __m256i*>(&weights_[0]);
+ const auto row0 = reinterpret_cast<const __m256i*>(&weights[0]);
- for (int j = 0; j < (int)kNumChunks; ++j)
+ for (int j = 0; j < (int)NumChunks; ++j)
{
- const __m256i in = input_vector256[j];
+ const __m256i in = inputVector256[j];
m256_add_dpbusd_epi32(sum0, in, row0[j]);
}
- output[0] = m256_hadd(sum0, biases_[0]);
+ output[0] = m256_hadd(sum0, biases[0]);
}
else
#endif
{
#if defined (USE_AVX512)
- constexpr IndexType kNumChunks = kPaddedInputDimensions / (kSimdWidth * 2);
+ constexpr IndexType NumChunks = PaddedInputDimensions / (SimdWidth * 2);
#else
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
+ constexpr IndexType NumChunks = PaddedInputDimensions / SimdWidth;
#endif
vec_t sum0 = vec_setzero();
- const auto row0 = reinterpret_cast<const vec_t*>(&weights_[0]);
+ const auto row0 = reinterpret_cast<const vec_t*>(&weights[0]);
- for (int j = 0; j < (int)kNumChunks; ++j)
+ for (int j = 0; j < (int)NumChunks; ++j)
{
- const vec_t in = input_vector[j];
+ const vec_t in = inputVector[j];
vec_add_dpbusd_32(sum0, in, row0[j]);
}
- output[0] = vec_hadd(sum0, biases_[0]);
+ output[0] = vec_hadd(sum0, biases[0]);
}
}
auto output = reinterpret_cast<OutputType*>(buffer);
#if defined(USE_SSE2)
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
- const __m128i kZeros = _mm_setzero_si128();
- const auto input_vector = reinterpret_cast<const __m128i*>(input);
+ // At least a multiple of 16, with SSE2.
+ static_assert(InputDimensions % SimdWidth == 0);
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
+ const __m128i Zeros = _mm_setzero_si128();
+ const auto inputVector = reinterpret_cast<const __m128i*>(input);
#elif defined(USE_MMX)
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
- const __m64 kZeros = _mm_setzero_si64();
- const auto input_vector = reinterpret_cast<const __m64*>(input);
+ static_assert(InputDimensions % SimdWidth == 0);
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
+ const __m64 Zeros = _mm_setzero_si64();
+ const auto inputVector = reinterpret_cast<const __m64*>(input);
#elif defined(USE_NEON)
- constexpr IndexType kNumChunks = kPaddedInputDimensions / kSimdWidth;
- const auto input_vector = reinterpret_cast<const int8x8_t*>(input);
+ static_assert(InputDimensions % SimdWidth == 0);
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
+ const auto inputVector = reinterpret_cast<const int8x8_t*>(input);
#endif
- for (IndexType i = 0; i < kOutputDimensions; ++i) {
- const IndexType offset = i * kPaddedInputDimensions;
+ for (IndexType i = 0; i < OutputDimensions; ++i) {
+ const IndexType offset = i * PaddedInputDimensions;
#if defined(USE_SSE2)
- __m128i sum_lo = _mm_cvtsi32_si128(biases_[i]);
- __m128i sum_hi = kZeros;
- const auto row = reinterpret_cast<const __m128i*>(&weights_[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
+ __m128i sumLo = _mm_cvtsi32_si128(biases[i]);
+ __m128i sumHi = Zeros;
+ const auto row = reinterpret_cast<const __m128i*>(&weights[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j) {
__m128i row_j = _mm_load_si128(&row[j]);
- __m128i input_j = _mm_load_si128(&input_vector[j]);
- __m128i extended_row_lo = _mm_srai_epi16(_mm_unpacklo_epi8(row_j, row_j), 8);
- __m128i extended_row_hi = _mm_srai_epi16(_mm_unpackhi_epi8(row_j, row_j), 8);
- __m128i extended_input_lo = _mm_unpacklo_epi8(input_j, kZeros);
- __m128i extended_input_hi = _mm_unpackhi_epi8(input_j, kZeros);
- __m128i product_lo = _mm_madd_epi16(extended_row_lo, extended_input_lo);
- __m128i product_hi = _mm_madd_epi16(extended_row_hi, extended_input_hi);
- sum_lo = _mm_add_epi32(sum_lo, product_lo);
- sum_hi = _mm_add_epi32(sum_hi, product_hi);
+ __m128i input_j = _mm_load_si128(&inputVector[j]);
+ __m128i extendedRowLo = _mm_srai_epi16(_mm_unpacklo_epi8(row_j, row_j), 8);
+ __m128i extendedRowHi = _mm_srai_epi16(_mm_unpackhi_epi8(row_j, row_j), 8);
+ __m128i extendedInputLo = _mm_unpacklo_epi8(input_j, Zeros);
+ __m128i extendedInputHi = _mm_unpackhi_epi8(input_j, Zeros);
+ __m128i productLo = _mm_madd_epi16(extendedRowLo, extendedInputLo);
+ __m128i productHi = _mm_madd_epi16(extendedRowHi, extendedInputHi);
+ sumLo = _mm_add_epi32(sumLo, productLo);
+ sumHi = _mm_add_epi32(sumHi, productHi);
}
- __m128i sum = _mm_add_epi32(sum_lo, sum_hi);
- __m128i sum_high_64 = _mm_shuffle_epi32(sum, _MM_SHUFFLE(1, 0, 3, 2));
- sum = _mm_add_epi32(sum, sum_high_64);
+ __m128i sum = _mm_add_epi32(sumLo, sumHi);
+ __m128i sumHigh_64 = _mm_shuffle_epi32(sum, _MM_SHUFFLE(1, 0, 3, 2));
+ sum = _mm_add_epi32(sum, sumHigh_64);
__m128i sum_second_32 = _mm_shufflelo_epi16(sum, _MM_SHUFFLE(1, 0, 3, 2));
sum = _mm_add_epi32(sum, sum_second_32);
output[i] = _mm_cvtsi128_si32(sum);
#elif defined(USE_MMX)
- __m64 sum_lo = _mm_cvtsi32_si64(biases_[i]);
- __m64 sum_hi = kZeros;
- const auto row = reinterpret_cast<const __m64*>(&weights_[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
+ __m64 sumLo = _mm_cvtsi32_si64(biases[i]);
+ __m64 sumHi = Zeros;
+ const auto row = reinterpret_cast<const __m64*>(&weights[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j) {
__m64 row_j = row[j];
- __m64 input_j = input_vector[j];
- __m64 extended_row_lo = _mm_srai_pi16(_mm_unpacklo_pi8(row_j, row_j), 8);
- __m64 extended_row_hi = _mm_srai_pi16(_mm_unpackhi_pi8(row_j, row_j), 8);
- __m64 extended_input_lo = _mm_unpacklo_pi8(input_j, kZeros);
- __m64 extended_input_hi = _mm_unpackhi_pi8(input_j, kZeros);
- __m64 product_lo = _mm_madd_pi16(extended_row_lo, extended_input_lo);
- __m64 product_hi = _mm_madd_pi16(extended_row_hi, extended_input_hi);
- sum_lo = _mm_add_pi32(sum_lo, product_lo);
- sum_hi = _mm_add_pi32(sum_hi, product_hi);
+ __m64 input_j = inputVector[j];
+ __m64 extendedRowLo = _mm_srai_pi16(_mm_unpacklo_pi8(row_j, row_j), 8);
+ __m64 extendedRowHi = _mm_srai_pi16(_mm_unpackhi_pi8(row_j, row_j), 8);
+ __m64 extendedInputLo = _mm_unpacklo_pi8(input_j, Zeros);
+ __m64 extendedInputHi = _mm_unpackhi_pi8(input_j, Zeros);
+ __m64 productLo = _mm_madd_pi16(extendedRowLo, extendedInputLo);
+ __m64 productHi = _mm_madd_pi16(extendedRowHi, extendedInputHi);
+ sumLo = _mm_add_pi32(sumLo, productLo);
+ sumHi = _mm_add_pi32(sumHi, productHi);
}
- __m64 sum = _mm_add_pi32(sum_lo, sum_hi);
+ __m64 sum = _mm_add_pi32(sumLo, sumHi);
sum = _mm_add_pi32(sum, _mm_unpackhi_pi32(sum, sum));
output[i] = _mm_cvtsi64_si32(sum);
#elif defined(USE_NEON)
- int32x4_t sum = {biases_[i]};
- const auto row = reinterpret_cast<const int8x8_t*>(&weights_[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- int16x8_t product = vmull_s8(input_vector[j * 2], row[j * 2]);
- product = vmlal_s8(product, input_vector[j * 2 + 1], row[j * 2 + 1]);
+ int32x4_t sum = {biases[i]};
+ const auto row = reinterpret_cast<const int8x8_t*>(&weights[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j) {
+ int16x8_t product = vmull_s8(inputVector[j * 2], row[j * 2]);
+ product = vmlal_s8(product, inputVector[j * 2 + 1], row[j * 2 + 1]);
sum = vpadalq_s16(sum, product);
}
output[i] = sum[0] + sum[1] + sum[2] + sum[3];
#else
- OutputType sum = biases_[i];
- for (IndexType j = 0; j < kInputDimensions; ++j) {
- sum += weights_[offset + j] * input[j];
+ OutputType sum = biases[i];
+ for (IndexType j = 0; j < InputDimensions; ++j) {
+ sum += weights[offset + j] * input[j];
}
output[i] = sum;
#endif
using BiasType = OutputType;
using WeightType = std::int8_t;
- PreviousLayer previous_layer_;
+ PreviousLayer previousLayer;
- alignas(kCacheLineSize) BiasType biases_[kOutputDimensions];
- alignas(kCacheLineSize) WeightType weights_[kOutputDimensions * kPaddedInputDimensions];
-#if defined (USE_SSSE3)
- struct CanSaturate {
- int count;
- struct Entry {
- uint16_t out;
- uint16_t in;
- int8_t w;
- } ids[kPaddedInputDimensions * kOutputDimensions * 3 / 4];
-
- void add(int i, int j, int8_t w) {
- ids[count].out = i;
- ids[count].in = j;
- ids[count].w = w;
- ++count;
- }
- } canSaturate16;
-#endif
+ alignas(CacheLineSize) BiasType biases[OutputDimensions];
+ alignas(CacheLineSize) WeightType weights[OutputDimensions * PaddedInputDimensions];
};
} // namespace Stockfish::Eval::NNUE::Layers
static_assert(std::is_same<InputType, std::int32_t>::value, "");
// Number of input/output dimensions
- static constexpr IndexType kInputDimensions =
- PreviousLayer::kOutputDimensions;
- static constexpr IndexType kOutputDimensions = kInputDimensions;
+ static constexpr IndexType InputDimensions =
+ PreviousLayer::OutputDimensions;
+ static constexpr IndexType OutputDimensions = InputDimensions;
// Size of forward propagation buffer used in this layer
- static constexpr std::size_t kSelfBufferSize =
- CeilToMultiple(kOutputDimensions * sizeof(OutputType), kCacheLineSize);
+ static constexpr std::size_t SelfBufferSize =
+ ceil_to_multiple(OutputDimensions * sizeof(OutputType), CacheLineSize);
// Size of the forward propagation buffer used from the input layer to this layer
- static constexpr std::size_t kBufferSize =
- PreviousLayer::kBufferSize + kSelfBufferSize;
+ static constexpr std::size_t BufferSize =
+ PreviousLayer::BufferSize + SelfBufferSize;
// Hash value embedded in the evaluation file
- static constexpr std::uint32_t GetHashValue() {
- std::uint32_t hash_value = 0x538D24C7u;
- hash_value += PreviousLayer::GetHashValue();
- return hash_value;
+ static constexpr std::uint32_t get_hash_value() {
+ std::uint32_t hashValue = 0x538D24C7u;
+ hashValue += PreviousLayer::get_hash_value();
+ return hashValue;
}
// Read network parameters
- bool ReadParameters(std::istream& stream) {
- return previous_layer_.ReadParameters(stream);
+ bool read_parameters(std::istream& stream) {
+ return previousLayer.read_parameters(stream);
+ }
+
+ // Write network parameters
+ bool write_parameters(std::ostream& stream) const {
+ return previousLayer.write_parameters(stream);
}
// Forward propagation
- const OutputType* Propagate(
- const TransformedFeatureType* transformed_features, char* buffer) const {
- const auto input = previous_layer_.Propagate(
- transformed_features, buffer + kSelfBufferSize);
+ const OutputType* propagate(
+ const TransformedFeatureType* transformedFeatures, char* buffer) const {
+ const auto input = previousLayer.propagate(
+ transformedFeatures, buffer + SelfBufferSize);
const auto output = reinterpret_cast<OutputType*>(buffer);
#if defined(USE_AVX2)
- constexpr IndexType kNumChunks = kInputDimensions / kSimdWidth;
- const __m256i kZero = _mm256_setzero_si256();
- const __m256i kOffsets = _mm256_set_epi32(7, 3, 6, 2, 5, 1, 4, 0);
- const auto in = reinterpret_cast<const __m256i*>(input);
- const auto out = reinterpret_cast<__m256i*>(output);
- for (IndexType i = 0; i < kNumChunks; ++i) {
- const __m256i words0 = _mm256_srai_epi16(_mm256_packs_epi32(
- _mm256_load_si256(&in[i * 4 + 0]),
- _mm256_load_si256(&in[i * 4 + 1])), kWeightScaleBits);
- const __m256i words1 = _mm256_srai_epi16(_mm256_packs_epi32(
- _mm256_load_si256(&in[i * 4 + 2]),
- _mm256_load_si256(&in[i * 4 + 3])), kWeightScaleBits);
- _mm256_store_si256(&out[i], _mm256_permutevar8x32_epi32(_mm256_max_epi8(
- _mm256_packs_epi16(words0, words1), kZero), kOffsets));
+ if constexpr (InputDimensions % SimdWidth == 0) {
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
+ const __m256i Zero = _mm256_setzero_si256();
+ const __m256i Offsets = _mm256_set_epi32(7, 3, 6, 2, 5, 1, 4, 0);
+ const auto in = reinterpret_cast<const __m256i*>(input);
+ const auto out = reinterpret_cast<__m256i*>(output);
+ for (IndexType i = 0; i < NumChunks; ++i) {
+ const __m256i words0 = _mm256_srai_epi16(_mm256_packs_epi32(
+ _mm256_load_si256(&in[i * 4 + 0]),
+ _mm256_load_si256(&in[i * 4 + 1])), WeightScaleBits);
+ const __m256i words1 = _mm256_srai_epi16(_mm256_packs_epi32(
+ _mm256_load_si256(&in[i * 4 + 2]),
+ _mm256_load_si256(&in[i * 4 + 3])), WeightScaleBits);
+ _mm256_store_si256(&out[i], _mm256_permutevar8x32_epi32(_mm256_max_epi8(
+ _mm256_packs_epi16(words0, words1), Zero), Offsets));
+ }
+ } else {
+ constexpr IndexType NumChunks = InputDimensions / (SimdWidth / 2);
+ const __m128i Zero = _mm_setzero_si128();
+ const auto in = reinterpret_cast<const __m128i*>(input);
+ const auto out = reinterpret_cast<__m128i*>(output);
+ for (IndexType i = 0; i < NumChunks; ++i) {
+ const __m128i words0 = _mm_srai_epi16(_mm_packs_epi32(
+ _mm_load_si128(&in[i * 4 + 0]),
+ _mm_load_si128(&in[i * 4 + 1])), WeightScaleBits);
+ const __m128i words1 = _mm_srai_epi16(_mm_packs_epi32(
+ _mm_load_si128(&in[i * 4 + 2]),
+ _mm_load_si128(&in[i * 4 + 3])), WeightScaleBits);
+ const __m128i packedbytes = _mm_packs_epi16(words0, words1);
+ _mm_store_si128(&out[i], _mm_max_epi8(packedbytes, Zero));
+ }
}
- constexpr IndexType kStart = kNumChunks * kSimdWidth;
+ constexpr IndexType Start =
+ InputDimensions % SimdWidth == 0
+ ? InputDimensions / SimdWidth * SimdWidth
+ : InputDimensions / (SimdWidth / 2) * (SimdWidth / 2);
#elif defined(USE_SSE2)
- constexpr IndexType kNumChunks = kInputDimensions / kSimdWidth;
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
#ifdef USE_SSE41
- const __m128i kZero = _mm_setzero_si128();
+ const __m128i Zero = _mm_setzero_si128();
#else
const __m128i k0x80s = _mm_set1_epi8(-128);
#endif
const auto in = reinterpret_cast<const __m128i*>(input);
const auto out = reinterpret_cast<__m128i*>(output);
- for (IndexType i = 0; i < kNumChunks; ++i) {
+ for (IndexType i = 0; i < NumChunks; ++i) {
const __m128i words0 = _mm_srai_epi16(_mm_packs_epi32(
_mm_load_si128(&in[i * 4 + 0]),
- _mm_load_si128(&in[i * 4 + 1])), kWeightScaleBits);
+ _mm_load_si128(&in[i * 4 + 1])), WeightScaleBits);
const __m128i words1 = _mm_srai_epi16(_mm_packs_epi32(
_mm_load_si128(&in[i * 4 + 2]),
- _mm_load_si128(&in[i * 4 + 3])), kWeightScaleBits);
+ _mm_load_si128(&in[i * 4 + 3])), WeightScaleBits);
const __m128i packedbytes = _mm_packs_epi16(words0, words1);
_mm_store_si128(&out[i],
#ifdef USE_SSE41
- _mm_max_epi8(packedbytes, kZero)
+ _mm_max_epi8(packedbytes, Zero)
#else
_mm_subs_epi8(_mm_adds_epi8(packedbytes, k0x80s), k0x80s)
#endif
);
}
- constexpr IndexType kStart = kNumChunks * kSimdWidth;
+ constexpr IndexType Start = NumChunks * SimdWidth;
#elif defined(USE_MMX)
- constexpr IndexType kNumChunks = kInputDimensions / kSimdWidth;
+ constexpr IndexType NumChunks = InputDimensions / SimdWidth;
const __m64 k0x80s = _mm_set1_pi8(-128);
const auto in = reinterpret_cast<const __m64*>(input);
const auto out = reinterpret_cast<__m64*>(output);
- for (IndexType i = 0; i < kNumChunks; ++i) {
+ for (IndexType i = 0; i < NumChunks; ++i) {
const __m64 words0 = _mm_srai_pi16(
_mm_packs_pi32(in[i * 4 + 0], in[i * 4 + 1]),
- kWeightScaleBits);
+ WeightScaleBits);
const __m64 words1 = _mm_srai_pi16(
_mm_packs_pi32(in[i * 4 + 2], in[i * 4 + 3]),
- kWeightScaleBits);
+ WeightScaleBits);
const __m64 packedbytes = _mm_packs_pi16(words0, words1);
out[i] = _mm_subs_pi8(_mm_adds_pi8(packedbytes, k0x80s), k0x80s);
}
_mm_empty();
- constexpr IndexType kStart = kNumChunks * kSimdWidth;
+ constexpr IndexType Start = NumChunks * SimdWidth;
#elif defined(USE_NEON)
- constexpr IndexType kNumChunks = kInputDimensions / (kSimdWidth / 2);
- const int8x8_t kZero = {0};
+ constexpr IndexType NumChunks = InputDimensions / (SimdWidth / 2);
+ const int8x8_t Zero = {0};
const auto in = reinterpret_cast<const int32x4_t*>(input);
const auto out = reinterpret_cast<int8x8_t*>(output);
- for (IndexType i = 0; i < kNumChunks; ++i) {
+ for (IndexType i = 0; i < NumChunks; ++i) {
int16x8_t shifted;
const auto pack = reinterpret_cast<int16x4_t*>(&shifted);
- pack[0] = vqshrn_n_s32(in[i * 2 + 0], kWeightScaleBits);
- pack[1] = vqshrn_n_s32(in[i * 2 + 1], kWeightScaleBits);
- out[i] = vmax_s8(vqmovn_s16(shifted), kZero);
+ pack[0] = vqshrn_n_s32(in[i * 2 + 0], WeightScaleBits);
+ pack[1] = vqshrn_n_s32(in[i * 2 + 1], WeightScaleBits);
+ out[i] = vmax_s8(vqmovn_s16(shifted), Zero);
}
- constexpr IndexType kStart = kNumChunks * (kSimdWidth / 2);
+ constexpr IndexType Start = NumChunks * (SimdWidth / 2);
#else
- constexpr IndexType kStart = 0;
+ constexpr IndexType Start = 0;
#endif
- for (IndexType i = kStart; i < kInputDimensions; ++i) {
+ for (IndexType i = Start; i < InputDimensions; ++i) {
output[i] = static_cast<OutputType>(
- std::max(0, std::min(127, input[i] >> kWeightScaleBits)));
+ std::max(0, std::min(127, input[i] >> WeightScaleBits)));
}
return output;
}
private:
- PreviousLayer previous_layer_;
+ PreviousLayer previousLayer;
};
} // namespace Stockfish::Eval::NNUE::Layers
namespace Stockfish::Eval::NNUE::Layers {
// Input layer
-template <IndexType OutputDimensions, IndexType Offset = 0>
+template <IndexType OutDims, IndexType Offset = 0>
class InputSlice {
public:
// Need to maintain alignment
- static_assert(Offset % kMaxSimdWidth == 0, "");
+ static_assert(Offset % MaxSimdWidth == 0, "");
// Output type
using OutputType = TransformedFeatureType;
// Output dimensionality
- static constexpr IndexType kOutputDimensions = OutputDimensions;
+ static constexpr IndexType OutputDimensions = OutDims;
// Size of forward propagation buffer used from the input layer to this layer
- static constexpr std::size_t kBufferSize = 0;
+ static constexpr std::size_t BufferSize = 0;
// Hash value embedded in the evaluation file
- static constexpr std::uint32_t GetHashValue() {
- std::uint32_t hash_value = 0xEC42E90Du;
- hash_value ^= kOutputDimensions ^ (Offset << 10);
- return hash_value;
+ static constexpr std::uint32_t get_hash_value() {
+ std::uint32_t hashValue = 0xEC42E90Du;
+ hashValue ^= OutputDimensions ^ (Offset << 10);
+ return hashValue;
}
// Read network parameters
- bool ReadParameters(std::istream& /*stream*/) {
+ bool read_parameters(std::istream& /*stream*/) {
+ return true;
+ }
+
+ // Write network parameters
+ bool write_parameters(std::ostream& /*stream*/) const {
return true;
}
// Forward propagation
- const OutputType* Propagate(
- const TransformedFeatureType* transformed_features,
+ const OutputType* propagate(
+ const TransformedFeatureType* transformedFeatures,
char* /*buffer*/) const {
- return transformed_features + Offset;
+ return transformedFeatures + Offset;
}
private:
namespace Stockfish::Eval::NNUE {
- // The accumulator of a StateInfo without parent is set to the INIT state
- enum AccumulatorState { EMPTY, COMPUTED, INIT };
-
// Class that holds the result of affine transformation of input features
- struct alignas(kCacheLineSize) Accumulator {
- std::int16_t
- accumulation[2][kRefreshTriggers.size()][kTransformedFeatureDimensions];
- AccumulatorState state[2];
+ struct alignas(CacheLineSize) Accumulator {
+ std::int16_t accumulation[2][TransformedFeatureDimensions];
+ std::int32_t psqtAccumulation[2][PSQTBuckets];
+ bool computed[2];
};
} // namespace Stockfish::Eval::NNUE
#ifndef NNUE_ARCHITECTURE_H_INCLUDED
#define NNUE_ARCHITECTURE_H_INCLUDED
-// Defines the network structure
-#include "architectures/halfkp_256x2-32-32.h"
+#include "nnue_common.h"
+
+#include "features/half_ka_v2.h"
+
+#include "layers/input_slice.h"
+#include "layers/affine_transform.h"
+#include "layers/clipped_relu.h"
namespace Stockfish::Eval::NNUE {
- static_assert(kTransformedFeatureDimensions % kMaxSimdWidth == 0, "");
- static_assert(Network::kOutputDimensions == 1, "");
- static_assert(std::is_same<Network::OutputType, std::int32_t>::value, "");
+ // Input features used in evaluation function
+ using FeatureSet = Features::HalfKAv2;
+
+ // Number of input feature dimensions after conversion
+ constexpr IndexType TransformedFeatureDimensions = 512;
+ constexpr IndexType PSQTBuckets = 8;
+ constexpr IndexType LayerStacks = 8;
+
+ namespace Layers {
- // Trigger for full calculation instead of difference calculation
- constexpr auto kRefreshTriggers = RawFeatures::kRefreshTriggers;
+ // Define network structure
+ using InputLayer = InputSlice<TransformedFeatureDimensions * 2>;
+ using HiddenLayer1 = ClippedReLU<AffineTransform<InputLayer, 16>>;
+ using HiddenLayer2 = ClippedReLU<AffineTransform<HiddenLayer1, 32>>;
+ using OutputLayer = AffineTransform<HiddenLayer2, 1>;
+
+ } // namespace Layers
+
+ using Network = Layers::OutputLayer;
+
+ static_assert(TransformedFeatureDimensions % MaxSimdWidth == 0, "");
+ static_assert(Network::OutputDimensions == 1, "");
+ static_assert(std::is_same<Network::OutputType, std::int32_t>::value, "");
} // namespace Stockfish::Eval::NNUE
#include <cstring>
#include <iostream>
+#include "../misc.h" // for IsLittleEndian
+
#if defined(USE_AVX2)
#include <immintrin.h>
namespace Stockfish::Eval::NNUE {
// Version of the evaluation file
- constexpr std::uint32_t kVersion = 0x7AF32F16u;
+ constexpr std::uint32_t Version = 0x7AF32F20u;
// Constant used in evaluation value calculation
- constexpr int FV_SCALE = 16;
- constexpr int kWeightScaleBits = 6;
+ constexpr int OutputScale = 16;
+ constexpr int WeightScaleBits = 6;
// Size of cache line (in bytes)
- constexpr std::size_t kCacheLineSize = 64;
+ constexpr std::size_t CacheLineSize = 64;
// SIMD width (in bytes)
#if defined(USE_AVX2)
- constexpr std::size_t kSimdWidth = 32;
+ constexpr std::size_t SimdWidth = 32;
#elif defined(USE_SSE2)
- constexpr std::size_t kSimdWidth = 16;
+ constexpr std::size_t SimdWidth = 16;
#elif defined(USE_MMX)
- constexpr std::size_t kSimdWidth = 8;
+ constexpr std::size_t SimdWidth = 8;
#elif defined(USE_NEON)
- constexpr std::size_t kSimdWidth = 16;
+ constexpr std::size_t SimdWidth = 16;
#endif
- constexpr std::size_t kMaxSimdWidth = 32;
-
- // unique number for each piece type on each square
- enum {
- PS_NONE = 0,
- PS_W_PAWN = 1,
- PS_B_PAWN = 1 * SQUARE_NB + 1,
- PS_W_KNIGHT = 2 * SQUARE_NB + 1,
- PS_B_KNIGHT = 3 * SQUARE_NB + 1,
- PS_W_BISHOP = 4 * SQUARE_NB + 1,
- PS_B_BISHOP = 5 * SQUARE_NB + 1,
- PS_W_ROOK = 6 * SQUARE_NB + 1,
- PS_B_ROOK = 7 * SQUARE_NB + 1,
- PS_W_QUEEN = 8 * SQUARE_NB + 1,
- PS_B_QUEEN = 9 * SQUARE_NB + 1,
- PS_W_KING = 10 * SQUARE_NB + 1,
- PS_END = PS_W_KING, // pieces without kings (pawns included)
- PS_B_KING = 11 * SQUARE_NB + 1,
- PS_END2 = 12 * SQUARE_NB + 1
- };
-
- constexpr uint32_t kpp_board_index[COLOR_NB][PIECE_NB] = {
- // convention: W - us, B - them
- // viewed from other side, W and B are reversed
- { PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE,
- PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE },
- { PS_NONE, PS_B_PAWN, PS_B_KNIGHT, PS_B_BISHOP, PS_B_ROOK, PS_B_QUEEN, PS_B_KING, PS_NONE,
- PS_NONE, PS_W_PAWN, PS_W_KNIGHT, PS_W_BISHOP, PS_W_ROOK, PS_W_QUEEN, PS_W_KING, PS_NONE }
- };
+ constexpr std::size_t MaxSimdWidth = 32;
// Type of input feature after conversion
using TransformedFeatureType = std::uint8_t;
// Round n up to be a multiple of base
template <typename IntType>
- constexpr IntType CeilToMultiple(IntType n, IntType base) {
+ constexpr IntType ceil_to_multiple(IntType n, IntType base) {
return (n + base - 1) / base * base;
}
// necessary to return a result with the byte ordering of the compiling machine.
template <typename IntType>
inline IntType read_little_endian(std::istream& stream) {
-
IntType result;
- std::uint8_t u[sizeof(IntType)];
- typename std::make_unsigned<IntType>::type v = 0;
- stream.read(reinterpret_cast<char*>(u), sizeof(IntType));
- for (std::size_t i = 0; i < sizeof(IntType); ++i)
- v = (v << 8) | u[sizeof(IntType) - i - 1];
+ if (IsLittleEndian)
+ stream.read(reinterpret_cast<char*>(&result), sizeof(IntType));
+ else
+ {
+ std::uint8_t u[sizeof(IntType)];
+ typename std::make_unsigned<IntType>::type v = 0;
+
+ stream.read(reinterpret_cast<char*>(u), sizeof(IntType));
+ for (std::size_t i = 0; i < sizeof(IntType); ++i)
+ v = (v << 8) | u[sizeof(IntType) - i - 1];
+
+ std::memcpy(&result, &v, sizeof(IntType));
+ }
- std::memcpy(&result, &v, sizeof(IntType));
return result;
}
+ // write_little_endian() is our utility to write an integer (signed or unsigned, any size)
+ // to a stream in little-endian order. We swap the byte order before the write if
+ // necessary to always write in little endian order, independantly of the byte
+ // ordering of the compiling machine.
+ template <typename IntType>
+ inline void write_little_endian(std::ostream& stream, IntType value) {
+
+ if (IsLittleEndian)
+ stream.write(reinterpret_cast<const char*>(&value), sizeof(IntType));
+ else
+ {
+ std::uint8_t u[sizeof(IntType)];
+ typename std::make_unsigned<IntType>::type v = value;
+
+ std::size_t i = 0;
+ // if constexpr to silence the warning about shift by 8
+ if constexpr (sizeof(IntType) > 1)
+ {
+ for (; i + 1 < sizeof(IntType); ++i)
+ {
+ u[i] = v;
+ v >>= 8;
+ }
+ }
+ u[i] = v;
+
+ stream.write(reinterpret_cast<char*>(u), sizeof(IntType));
+ }
+ }
+
+ // read_little_endian(s, out, N) : read integers in bulk from a little indian stream.
+ // This reads N integers from stream s and put them in array out.
+ template <typename IntType>
+ inline void read_little_endian(std::istream& stream, IntType* out, std::size_t count) {
+ if (IsLittleEndian)
+ stream.read(reinterpret_cast<char*>(out), sizeof(IntType) * count);
+ else
+ for (std::size_t i = 0; i < count; ++i)
+ out[i] = read_little_endian<IntType>(stream);
+ }
+
+ // write_little_endian(s, values, N) : write integers in bulk to a little indian stream.
+ // This takes N integers from array values and writes them on stream s.
+ template <typename IntType>
+ inline void write_little_endian(std::ostream& stream, const IntType* values, std::size_t count) {
+ if (IsLittleEndian)
+ stream.write(reinterpret_cast<const char*>(values), sizeof(IntType) * count);
+ else
+ for (std::size_t i = 0; i < count; ++i)
+ write_little_endian<IntType>(stream, values[i]);
+ }
+
} // namespace Stockfish::Eval::NNUE
#endif // #ifndef NNUE_COMMON_H_INCLUDED
#include "nnue_common.h"
#include "nnue_architecture.h"
-#include "features/index_list.h"
#include <cstring> // std::memset()
namespace Stockfish::Eval::NNUE {
+ using BiasType = std::int16_t;
+ using WeightType = std::int16_t;
+ using PSQTWeightType = std::int32_t;
+
// If vector instructions are enabled, we update and refresh the
// accumulator tile by tile such that each tile fits in the CPU's
// vector registers.
#define VECTOR
+ static_assert(PSQTBuckets % 8 == 0,
+ "Per feature PSQT values cannot be processed at granularity lower than 8 at a time.");
+
#ifdef USE_AVX512
typedef __m512i vec_t;
+ typedef __m256i psqt_vec_t;
#define vec_load(a) _mm512_load_si512(a)
#define vec_store(a,b) _mm512_store_si512(a,b)
#define vec_add_16(a,b) _mm512_add_epi16(a,b)
#define vec_sub_16(a,b) _mm512_sub_epi16(a,b)
- static constexpr IndexType kNumRegs = 8; // only 8 are needed
+ #define vec_load_psqt(a) _mm256_load_si256(a)
+ #define vec_store_psqt(a,b) _mm256_store_si256(a,b)
+ #define vec_add_psqt_32(a,b) _mm256_add_epi32(a,b)
+ #define vec_sub_psqt_32(a,b) _mm256_sub_epi32(a,b)
+ #define vec_zero_psqt() _mm256_setzero_si256()
+ #define NumRegistersSIMD 32
#elif USE_AVX2
typedef __m256i vec_t;
+ typedef __m256i psqt_vec_t;
#define vec_load(a) _mm256_load_si256(a)
#define vec_store(a,b) _mm256_store_si256(a,b)
#define vec_add_16(a,b) _mm256_add_epi16(a,b)
#define vec_sub_16(a,b) _mm256_sub_epi16(a,b)
- static constexpr IndexType kNumRegs = 16;
+ #define vec_load_psqt(a) _mm256_load_si256(a)
+ #define vec_store_psqt(a,b) _mm256_store_si256(a,b)
+ #define vec_add_psqt_32(a,b) _mm256_add_epi32(a,b)
+ #define vec_sub_psqt_32(a,b) _mm256_sub_epi32(a,b)
+ #define vec_zero_psqt() _mm256_setzero_si256()
+ #define NumRegistersSIMD 16
#elif USE_SSE2
typedef __m128i vec_t;
+ typedef __m128i psqt_vec_t;
#define vec_load(a) (*(a))
#define vec_store(a,b) *(a)=(b)
#define vec_add_16(a,b) _mm_add_epi16(a,b)
#define vec_sub_16(a,b) _mm_sub_epi16(a,b)
- static constexpr IndexType kNumRegs = Is64Bit ? 16 : 8;
+ #define vec_load_psqt(a) (*(a))
+ #define vec_store_psqt(a,b) *(a)=(b)
+ #define vec_add_psqt_32(a,b) _mm_add_epi32(a,b)
+ #define vec_sub_psqt_32(a,b) _mm_sub_epi32(a,b)
+ #define vec_zero_psqt() _mm_setzero_si128()
+ #define NumRegistersSIMD (Is64Bit ? 16 : 8)
#elif USE_MMX
typedef __m64 vec_t;
+ typedef __m64 psqt_vec_t;
#define vec_load(a) (*(a))
#define vec_store(a,b) *(a)=(b)
#define vec_add_16(a,b) _mm_add_pi16(a,b)
#define vec_sub_16(a,b) _mm_sub_pi16(a,b)
- static constexpr IndexType kNumRegs = 8;
+ #define vec_load_psqt(a) (*(a))
+ #define vec_store_psqt(a,b) *(a)=(b)
+ #define vec_add_psqt_32(a,b) _mm_add_pi32(a,b)
+ #define vec_sub_psqt_32(a,b) _mm_sub_pi32(a,b)
+ #define vec_zero_psqt() _mm_setzero_si64()
+ #define NumRegistersSIMD 8
#elif USE_NEON
typedef int16x8_t vec_t;
+ typedef int32x4_t psqt_vec_t;
#define vec_load(a) (*(a))
#define vec_store(a,b) *(a)=(b)
#define vec_add_16(a,b) vaddq_s16(a,b)
#define vec_sub_16(a,b) vsubq_s16(a,b)
- static constexpr IndexType kNumRegs = 16;
+ #define vec_load_psqt(a) (*(a))
+ #define vec_store_psqt(a,b) *(a)=(b)
+ #define vec_add_psqt_32(a,b) vaddq_s32(a,b)
+ #define vec_sub_psqt_32(a,b) vsubq_s32(a,b)
+ #define vec_zero_psqt() psqt_vec_t{0}
+ #define NumRegistersSIMD 16
#else
#undef VECTOR
#endif
+
+ #ifdef VECTOR
+
+ // Compute optimal SIMD register count for feature transformer accumulation.
+
+ // We use __m* types as template arguments, which causes GCC to emit warnings
+ // about losing some attribute information. This is irrelevant to us as we
+ // only take their size, so the following pragma are harmless.
+ #pragma GCC diagnostic push
+ #pragma GCC diagnostic ignored "-Wignored-attributes"
+
+ template <typename SIMDRegisterType,
+ typename LaneType,
+ int NumLanes,
+ int MaxRegisters>
+ static constexpr int BestRegisterCount()
+ {
+ #define RegisterSize sizeof(SIMDRegisterType)
+ #define LaneSize sizeof(LaneType)
+
+ static_assert(RegisterSize >= LaneSize);
+ static_assert(MaxRegisters <= NumRegistersSIMD);
+ static_assert(MaxRegisters > 0);
+ static_assert(NumRegistersSIMD > 0);
+ static_assert(RegisterSize % LaneSize == 0);
+ static_assert((NumLanes * LaneSize) % RegisterSize == 0);
+
+ const int ideal = (NumLanes * LaneSize) / RegisterSize;
+ if (ideal <= MaxRegisters)
+ return ideal;
+
+ // Look for the largest divisor of the ideal register count that is smaller than MaxRegisters
+ for (int divisor = MaxRegisters; divisor > 1; --divisor)
+ if (ideal % divisor == 0)
+ return divisor;
+
+ return 1;
+ }
+
+ static constexpr int NumRegs = BestRegisterCount<vec_t, WeightType, TransformedFeatureDimensions, NumRegistersSIMD>();
+ static constexpr int NumPsqtRegs = BestRegisterCount<psqt_vec_t, PSQTWeightType, PSQTBuckets, NumRegistersSIMD>();
+
+ #pragma GCC diagnostic pop
+
+ #endif
+
+
+
// Input feature converter
class FeatureTransformer {
private:
// Number of output dimensions for one side
- static constexpr IndexType kHalfDimensions = kTransformedFeatureDimensions;
+ static constexpr IndexType HalfDimensions = TransformedFeatureDimensions;
#ifdef VECTOR
- static constexpr IndexType kTileHeight = kNumRegs * sizeof(vec_t) / 2;
- static_assert(kHalfDimensions % kTileHeight == 0, "kTileHeight must divide kHalfDimensions");
+ static constexpr IndexType TileHeight = NumRegs * sizeof(vec_t) / 2;
+ static constexpr IndexType PsqtTileHeight = NumPsqtRegs * sizeof(psqt_vec_t) / 4;
+ static_assert(HalfDimensions % TileHeight == 0, "TileHeight must divide HalfDimensions");
+ static_assert(PSQTBuckets % PsqtTileHeight == 0, "PsqtTileHeight must divide PSQTBuckets");
#endif
public:
using OutputType = TransformedFeatureType;
// Number of input/output dimensions
- static constexpr IndexType kInputDimensions = RawFeatures::kDimensions;
- static constexpr IndexType kOutputDimensions = kHalfDimensions * 2;
+ static constexpr IndexType InputDimensions = FeatureSet::Dimensions;
+ static constexpr IndexType OutputDimensions = HalfDimensions * 2;
// Size of forward propagation buffer
- static constexpr std::size_t kBufferSize =
- kOutputDimensions * sizeof(OutputType);
+ static constexpr std::size_t BufferSize =
+ OutputDimensions * sizeof(OutputType);
// Hash value embedded in the evaluation file
- static constexpr std::uint32_t GetHashValue() {
-
- return RawFeatures::kHashValue ^ kOutputDimensions;
+ static constexpr std::uint32_t get_hash_value() {
+ return FeatureSet::HashValue ^ OutputDimensions;
}
// Read network parameters
- bool ReadParameters(std::istream& stream) {
+ bool read_parameters(std::istream& stream) {
+
+ read_little_endian<BiasType >(stream, biases , HalfDimensions );
+ read_little_endian<WeightType >(stream, weights , HalfDimensions * InputDimensions);
+ read_little_endian<PSQTWeightType>(stream, psqtWeights, PSQTBuckets * InputDimensions);
- for (std::size_t i = 0; i < kHalfDimensions; ++i)
- biases_[i] = read_little_endian<BiasType>(stream);
- for (std::size_t i = 0; i < kHalfDimensions * kInputDimensions; ++i)
- weights_[i] = read_little_endian<WeightType>(stream);
return !stream.fail();
}
- // Convert input features
- void Transform(const Position& pos, OutputType* output) const {
+ // Write network parameters
+ bool write_parameters(std::ostream& stream) const {
+
+ write_little_endian<BiasType >(stream, biases , HalfDimensions );
+ write_little_endian<WeightType >(stream, weights , HalfDimensions * InputDimensions);
+ write_little_endian<PSQTWeightType>(stream, psqtWeights, PSQTBuckets * InputDimensions);
- UpdateAccumulator(pos, WHITE);
- UpdateAccumulator(pos, BLACK);
+ return !stream.fail();
+ }
+
+ // Convert input features
+ std::int32_t transform(const Position& pos, OutputType* output, int bucket) const {
+ update_accumulator(pos, WHITE);
+ update_accumulator(pos, BLACK);
+ const Color perspectives[2] = {pos.side_to_move(), ~pos.side_to_move()};
const auto& accumulation = pos.state()->accumulator.accumulation;
+ const auto& psqtAccumulation = pos.state()->accumulator.psqtAccumulation;
+
+ const auto psqt = (
+ psqtAccumulation[perspectives[0]][bucket]
+ - psqtAccumulation[perspectives[1]][bucket]
+ ) / 2;
+
#if defined(USE_AVX512)
- constexpr IndexType kNumChunks = kHalfDimensions / (kSimdWidth * 2);
- static_assert(kHalfDimensions % (kSimdWidth * 2) == 0);
- const __m512i kControl = _mm512_setr_epi64(0, 2, 4, 6, 1, 3, 5, 7);
- const __m512i kZero = _mm512_setzero_si512();
+
+ constexpr IndexType NumChunks = HalfDimensions / (SimdWidth * 2);
+ static_assert(HalfDimensions % (SimdWidth * 2) == 0);
+ const __m512i Control = _mm512_setr_epi64(0, 2, 4, 6, 1, 3, 5, 7);
+ const __m512i Zero = _mm512_setzero_si512();
+
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ auto out = reinterpret_cast<__m512i*>(&output[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j)
+ {
+ __m512i sum0 = _mm512_load_si512(&reinterpret_cast<const __m512i*>
+ (accumulation[perspectives[p]])[j * 2 + 0]);
+ __m512i sum1 = _mm512_load_si512(&reinterpret_cast<const __m512i*>
+ (accumulation[perspectives[p]])[j * 2 + 1]);
+
+ _mm512_store_si512(&out[j], _mm512_permutexvar_epi64(Control,
+ _mm512_max_epi8(_mm512_packs_epi16(sum0, sum1), Zero)));
+ }
+ }
+ return psqt;
#elif defined(USE_AVX2)
- constexpr IndexType kNumChunks = kHalfDimensions / kSimdWidth;
- constexpr int kControl = 0b11011000;
- const __m256i kZero = _mm256_setzero_si256();
+
+ constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
+ constexpr int Control = 0b11011000;
+ const __m256i Zero = _mm256_setzero_si256();
+
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ auto out = reinterpret_cast<__m256i*>(&output[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j)
+ {
+ __m256i sum0 = _mm256_load_si256(&reinterpret_cast<const __m256i*>
+ (accumulation[perspectives[p]])[j * 2 + 0]);
+ __m256i sum1 = _mm256_load_si256(&reinterpret_cast<const __m256i*>
+ (accumulation[perspectives[p]])[j * 2 + 1]);
+
+ _mm256_store_si256(&out[j], _mm256_permute4x64_epi64(
+ _mm256_max_epi8(_mm256_packs_epi16(sum0, sum1), Zero), Control));
+ }
+ }
+ return psqt;
#elif defined(USE_SSE2)
- constexpr IndexType kNumChunks = kHalfDimensions / kSimdWidth;
- #ifdef USE_SSE41
- const __m128i kZero = _mm_setzero_si128();
- #else
+ #ifdef USE_SSE41
+ constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
+ const __m128i Zero = _mm_setzero_si128();
+ #else
+ constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
const __m128i k0x80s = _mm_set1_epi8(-128);
- #endif
+ #endif
+
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ auto out = reinterpret_cast<__m128i*>(&output[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j)
+ {
+ __m128i sum0 = _mm_load_si128(&reinterpret_cast<const __m128i*>
+ (accumulation[perspectives[p]])[j * 2 + 0]);
+ __m128i sum1 = _mm_load_si128(&reinterpret_cast<const __m128i*>
+ (accumulation[perspectives[p]])[j * 2 + 1]);
+ const __m128i packedbytes = _mm_packs_epi16(sum0, sum1);
+
+ #ifdef USE_SSE41
+ _mm_store_si128(&out[j], _mm_max_epi8(packedbytes, Zero));
+ #else
+ _mm_store_si128(&out[j], _mm_subs_epi8(_mm_adds_epi8(packedbytes, k0x80s), k0x80s));
+ #endif
+ }
+ }
+ return psqt;
#elif defined(USE_MMX)
- constexpr IndexType kNumChunks = kHalfDimensions / kSimdWidth;
+
+ constexpr IndexType NumChunks = HalfDimensions / SimdWidth;
const __m64 k0x80s = _mm_set1_pi8(-128);
- #elif defined(USE_NEON)
- constexpr IndexType kNumChunks = kHalfDimensions / (kSimdWidth / 2);
- const int8x8_t kZero = {0};
- #endif
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ auto out = reinterpret_cast<__m64*>(&output[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j)
+ {
+ __m64 sum0 = *(&reinterpret_cast<const __m64*>(accumulation[perspectives[p]])[j * 2 + 0]);
+ __m64 sum1 = *(&reinterpret_cast<const __m64*>(accumulation[perspectives[p]])[j * 2 + 1]);
+ const __m64 packedbytes = _mm_packs_pi16(sum0, sum1);
+ out[j] = _mm_subs_pi8(_mm_adds_pi8(packedbytes, k0x80s), k0x80s);
+ }
+ }
+ _mm_empty();
+ return psqt;
- const Color perspectives[2] = {pos.side_to_move(), ~pos.side_to_move()};
- for (IndexType p = 0; p < 2; ++p) {
- const IndexType offset = kHalfDimensions * p;
+ #elif defined(USE_NEON)
- #if defined(USE_AVX512)
- auto out = reinterpret_cast<__m512i*>(&output[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- __m512i sum0 = _mm512_load_si512(
- &reinterpret_cast<const __m512i*>(accumulation[perspectives[p]][0])[j * 2 + 0]);
- __m512i sum1 = _mm512_load_si512(
- &reinterpret_cast<const __m512i*>(accumulation[perspectives[p]][0])[j * 2 + 1]);
- _mm512_store_si512(&out[j], _mm512_permutexvar_epi64(kControl,
- _mm512_max_epi8(_mm512_packs_epi16(sum0, sum1), kZero)));
- }
+ constexpr IndexType NumChunks = HalfDimensions / (SimdWidth / 2);
+ const int8x8_t Zero = {0};
- #elif defined(USE_AVX2)
- auto out = reinterpret_cast<__m256i*>(&output[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- __m256i sum0 = _mm256_load_si256(
- &reinterpret_cast<const __m256i*>(accumulation[perspectives[p]][0])[j * 2 + 0]);
- __m256i sum1 = _mm256_load_si256(
- &reinterpret_cast<const __m256i*>(accumulation[perspectives[p]][0])[j * 2 + 1]);
- _mm256_store_si256(&out[j], _mm256_permute4x64_epi64(_mm256_max_epi8(
- _mm256_packs_epi16(sum0, sum1), kZero), kControl));
- }
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ const auto out = reinterpret_cast<int8x8_t*>(&output[offset]);
+ for (IndexType j = 0; j < NumChunks; ++j)
+ {
+ int16x8_t sum = reinterpret_cast<const int16x8_t*>(accumulation[perspectives[p]])[j];
+ out[j] = vmax_s8(vqmovn_s16(sum), Zero);
+ }
+ }
+ return psqt;
- #elif defined(USE_SSE2)
- auto out = reinterpret_cast<__m128i*>(&output[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- __m128i sum0 = _mm_load_si128(&reinterpret_cast<const __m128i*>(
- accumulation[perspectives[p]][0])[j * 2 + 0]);
- __m128i sum1 = _mm_load_si128(&reinterpret_cast<const __m128i*>(
- accumulation[perspectives[p]][0])[j * 2 + 1]);
- const __m128i packedbytes = _mm_packs_epi16(sum0, sum1);
-
- _mm_store_si128(&out[j],
-
- #ifdef USE_SSE41
- _mm_max_epi8(packedbytes, kZero)
#else
- _mm_subs_epi8(_mm_adds_epi8(packedbytes, k0x80s), k0x80s)
- #endif
- );
- }
+ for (IndexType p = 0; p < 2; ++p)
+ {
+ const IndexType offset = HalfDimensions * p;
+ for (IndexType j = 0; j < HalfDimensions; ++j)
+ {
+ BiasType sum = accumulation[perspectives[p]][j];
+ output[offset + j] = static_cast<OutputType>(std::max<int>(0, std::min<int>(127, sum)));
+ }
+ }
+ return psqt;
- #elif defined(USE_MMX)
- auto out = reinterpret_cast<__m64*>(&output[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- __m64 sum0 = *(&reinterpret_cast<const __m64*>(
- accumulation[perspectives[p]][0])[j * 2 + 0]);
- __m64 sum1 = *(&reinterpret_cast<const __m64*>(
- accumulation[perspectives[p]][0])[j * 2 + 1]);
- const __m64 packedbytes = _mm_packs_pi16(sum0, sum1);
- out[j] = _mm_subs_pi8(_mm_adds_pi8(packedbytes, k0x80s), k0x80s);
- }
+ #endif
- #elif defined(USE_NEON)
- const auto out = reinterpret_cast<int8x8_t*>(&output[offset]);
- for (IndexType j = 0; j < kNumChunks; ++j) {
- int16x8_t sum = reinterpret_cast<const int16x8_t*>(
- accumulation[perspectives[p]][0])[j];
- out[j] = vmax_s8(vqmovn_s16(sum), kZero);
- }
+ } // end of function transform()
- #else
- for (IndexType j = 0; j < kHalfDimensions; ++j) {
- BiasType sum = accumulation[static_cast<int>(perspectives[p])][0][j];
- output[offset + j] = static_cast<OutputType>(
- std::max<int>(0, std::min<int>(127, sum)));
- }
- #endif
- }
- #if defined(USE_MMX)
- _mm_empty();
- #endif
- }
private:
- void UpdateAccumulator(const Position& pos, const Color c) const {
+ void update_accumulator(const Position& pos, const Color perspective) const {
+
+ // The size must be enough to contain the largest possible update.
+ // That might depend on the feature set and generally relies on the
+ // feature set's update cost calculation to be correct and never
+ // allow updates with more added/removed features than MaxActiveDimensions.
+ using IndexList = ValueList<IndexType, FeatureSet::MaxActiveDimensions>;
#ifdef VECTOR
// Gcc-10.2 unnecessarily spills AVX2 registers if this array
// is defined in the VECTOR code below, once in each branch
- vec_t acc[kNumRegs];
+ vec_t acc[NumRegs];
+ psqt_vec_t psqt[NumPsqtRegs];
#endif
// Look for a usable accumulator of an earlier position. We keep track
// of the estimated gain in terms of features to be added/subtracted.
StateInfo *st = pos.state(), *next = nullptr;
- int gain = pos.count<ALL_PIECES>() - 2;
- while (st->accumulator.state[c] == EMPTY)
+ int gain = FeatureSet::refresh_cost(pos);
+ while (st->previous && !st->accumulator.computed[perspective])
{
- auto& dp = st->dirtyPiece;
- // The first condition tests whether an incremental update is
- // possible at all: if this side's king has moved, it is not possible.
- static_assert(std::is_same_v<RawFeatures::SortedTriggerSet,
- Features::CompileTimeList<Features::TriggerEvent, Features::TriggerEvent::kFriendKingMoved>>,
- "Current code assumes that only kFriendlyKingMoved refresh trigger is being used.");
- if ( dp.piece[0] == make_piece(c, KING)
- || (gain -= dp.dirty_num + 1) < 0)
+ // This governs when a full feature refresh is needed and how many
+ // updates are better than just one full refresh.
+ if ( FeatureSet::requires_refresh(st, perspective)
+ || (gain -= FeatureSet::update_cost(st) + 1) < 0)
break;
next = st;
st = st->previous;
}
- if (st->accumulator.state[c] == COMPUTED)
+ if (st->accumulator.computed[perspective])
{
if (next == nullptr)
return;
// Update incrementally in two steps. First, we update the "next"
// accumulator. Then, we update the current accumulator (pos.state()).
- // Gather all features to be updated. This code assumes HalfKP features
- // only and doesn't support refresh triggers.
- static_assert(std::is_same_v<Features::FeatureSet<Features::HalfKP<Features::Side::kFriend>>,
- RawFeatures>);
- Features::IndexList removed[2], added[2];
- Features::HalfKP<Features::Side::kFriend>::AppendChangedIndices(pos,
- next->dirtyPiece, c, &removed[0], &added[0]);
+ // Gather all features to be updated.
+ const Square ksq = pos.square<KING>(perspective);
+ IndexList removed[2], added[2];
+ FeatureSet::append_changed_indices(
+ ksq, next, perspective, removed[0], added[0]);
for (StateInfo *st2 = pos.state(); st2 != next; st2 = st2->previous)
- Features::HalfKP<Features::Side::kFriend>::AppendChangedIndices(pos,
- st2->dirtyPiece, c, &removed[1], &added[1]);
+ FeatureSet::append_changed_indices(
+ ksq, st2, perspective, removed[1], added[1]);
// Mark the accumulators as computed.
- next->accumulator.state[c] = COMPUTED;
- pos.state()->accumulator.state[c] = COMPUTED;
+ next->accumulator.computed[perspective] = true;
+ pos.state()->accumulator.computed[perspective] = true;
- // Now update the accumulators listed in info[], where the last element is a sentinel.
- StateInfo *info[3] =
+ // Now update the accumulators listed in states_to_update[], where the last element is a sentinel.
+ StateInfo *states_to_update[3] =
{ next, next == pos.state() ? nullptr : pos.state(), nullptr };
#ifdef VECTOR
- for (IndexType j = 0; j < kHalfDimensions / kTileHeight; ++j)
+ for (IndexType j = 0; j < HalfDimensions / TileHeight; ++j)
{
// Load accumulator
auto accTile = reinterpret_cast<vec_t*>(
- &st->accumulator.accumulation[c][0][j * kTileHeight]);
- for (IndexType k = 0; k < kNumRegs; ++k)
+ &st->accumulator.accumulation[perspective][j * TileHeight]);
+ for (IndexType k = 0; k < NumRegs; ++k)
acc[k] = vec_load(&accTile[k]);
- for (IndexType i = 0; info[i]; ++i)
+ for (IndexType i = 0; states_to_update[i]; ++i)
{
// Difference calculation for the deactivated features
for (const auto index : removed[i])
{
- const IndexType offset = kHalfDimensions * index + j * kTileHeight;
- auto column = reinterpret_cast<const vec_t*>(&weights_[offset]);
- for (IndexType k = 0; k < kNumRegs; ++k)
+ const IndexType offset = HalfDimensions * index + j * TileHeight;
+ auto column = reinterpret_cast<const vec_t*>(&weights[offset]);
+ for (IndexType k = 0; k < NumRegs; ++k)
acc[k] = vec_sub_16(acc[k], column[k]);
}
// Difference calculation for the activated features
for (const auto index : added[i])
{
- const IndexType offset = kHalfDimensions * index + j * kTileHeight;
- auto column = reinterpret_cast<const vec_t*>(&weights_[offset]);
- for (IndexType k = 0; k < kNumRegs; ++k)
+ const IndexType offset = HalfDimensions * index + j * TileHeight;
+ auto column = reinterpret_cast<const vec_t*>(&weights[offset]);
+ for (IndexType k = 0; k < NumRegs; ++k)
acc[k] = vec_add_16(acc[k], column[k]);
}
// Store accumulator
accTile = reinterpret_cast<vec_t*>(
- &info[i]->accumulator.accumulation[c][0][j * kTileHeight]);
- for (IndexType k = 0; k < kNumRegs; ++k)
+ &states_to_update[i]->accumulator.accumulation[perspective][j * TileHeight]);
+ for (IndexType k = 0; k < NumRegs; ++k)
vec_store(&accTile[k], acc[k]);
}
}
+ for (IndexType j = 0; j < PSQTBuckets / PsqtTileHeight; ++j)
+ {
+ // Load accumulator
+ auto accTilePsqt = reinterpret_cast<psqt_vec_t*>(
+ &st->accumulator.psqtAccumulation[perspective][j * PsqtTileHeight]);
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ psqt[k] = vec_load_psqt(&accTilePsqt[k]);
+
+ for (IndexType i = 0; states_to_update[i]; ++i)
+ {
+ // Difference calculation for the deactivated features
+ for (const auto index : removed[i])
+ {
+ const IndexType offset = PSQTBuckets * index + j * PsqtTileHeight;
+ auto columnPsqt = reinterpret_cast<const psqt_vec_t*>(&psqtWeights[offset]);
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ psqt[k] = vec_sub_psqt_32(psqt[k], columnPsqt[k]);
+ }
+
+ // Difference calculation for the activated features
+ for (const auto index : added[i])
+ {
+ const IndexType offset = PSQTBuckets * index + j * PsqtTileHeight;
+ auto columnPsqt = reinterpret_cast<const psqt_vec_t*>(&psqtWeights[offset]);
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ psqt[k] = vec_add_psqt_32(psqt[k], columnPsqt[k]);
+ }
+
+ // Store accumulator
+ accTilePsqt = reinterpret_cast<psqt_vec_t*>(
+ &states_to_update[i]->accumulator.psqtAccumulation[perspective][j * PsqtTileHeight]);
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ vec_store_psqt(&accTilePsqt[k], psqt[k]);
+ }
+ }
+
#else
- for (IndexType i = 0; info[i]; ++i)
+ for (IndexType i = 0; states_to_update[i]; ++i)
{
- std::memcpy(info[i]->accumulator.accumulation[c][0],
- st->accumulator.accumulation[c][0],
- kHalfDimensions * sizeof(BiasType));
- st = info[i];
+ std::memcpy(states_to_update[i]->accumulator.accumulation[perspective],
+ st->accumulator.accumulation[perspective],
+ HalfDimensions * sizeof(BiasType));
+
+ for (std::size_t k = 0; k < PSQTBuckets; ++k)
+ states_to_update[i]->accumulator.psqtAccumulation[perspective][k] = st->accumulator.psqtAccumulation[perspective][k];
+
+ st = states_to_update[i];
// Difference calculation for the deactivated features
for (const auto index : removed[i])
{
- const IndexType offset = kHalfDimensions * index;
+ const IndexType offset = HalfDimensions * index;
+
+ for (IndexType j = 0; j < HalfDimensions; ++j)
+ st->accumulator.accumulation[perspective][j] -= weights[offset + j];
- for (IndexType j = 0; j < kHalfDimensions; ++j)
- st->accumulator.accumulation[c][0][j] -= weights_[offset + j];
+ for (std::size_t k = 0; k < PSQTBuckets; ++k)
+ st->accumulator.psqtAccumulation[perspective][k] -= psqtWeights[index * PSQTBuckets + k];
}
// Difference calculation for the activated features
for (const auto index : added[i])
{
- const IndexType offset = kHalfDimensions * index;
+ const IndexType offset = HalfDimensions * index;
- for (IndexType j = 0; j < kHalfDimensions; ++j)
- st->accumulator.accumulation[c][0][j] += weights_[offset + j];
+ for (IndexType j = 0; j < HalfDimensions; ++j)
+ st->accumulator.accumulation[perspective][j] += weights[offset + j];
+
+ for (std::size_t k = 0; k < PSQTBuckets; ++k)
+ st->accumulator.psqtAccumulation[perspective][k] += psqtWeights[index * PSQTBuckets + k];
}
}
#endif
{
// Refresh the accumulator
auto& accumulator = pos.state()->accumulator;
- accumulator.state[c] = COMPUTED;
- Features::IndexList active;
- Features::HalfKP<Features::Side::kFriend>::AppendActiveIndices(pos, c, &active);
+ accumulator.computed[perspective] = true;
+ IndexList active;
+ FeatureSet::append_active_indices(pos, perspective, active);
#ifdef VECTOR
- for (IndexType j = 0; j < kHalfDimensions / kTileHeight; ++j)
+ for (IndexType j = 0; j < HalfDimensions / TileHeight; ++j)
{
auto biasesTile = reinterpret_cast<const vec_t*>(
- &biases_[j * kTileHeight]);
- for (IndexType k = 0; k < kNumRegs; ++k)
+ &biases[j * TileHeight]);
+ for (IndexType k = 0; k < NumRegs; ++k)
acc[k] = biasesTile[k];
for (const auto index : active)
{
- const IndexType offset = kHalfDimensions * index + j * kTileHeight;
- auto column = reinterpret_cast<const vec_t*>(&weights_[offset]);
+ const IndexType offset = HalfDimensions * index + j * TileHeight;
+ auto column = reinterpret_cast<const vec_t*>(&weights[offset]);
- for (unsigned k = 0; k < kNumRegs; ++k)
+ for (unsigned k = 0; k < NumRegs; ++k)
acc[k] = vec_add_16(acc[k], column[k]);
}
auto accTile = reinterpret_cast<vec_t*>(
- &accumulator.accumulation[c][0][j * kTileHeight]);
- for (unsigned k = 0; k < kNumRegs; k++)
+ &accumulator.accumulation[perspective][j * TileHeight]);
+ for (unsigned k = 0; k < NumRegs; k++)
vec_store(&accTile[k], acc[k]);
}
+ for (IndexType j = 0; j < PSQTBuckets / PsqtTileHeight; ++j)
+ {
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ psqt[k] = vec_zero_psqt();
+
+ for (const auto index : active)
+ {
+ const IndexType offset = PSQTBuckets * index + j * PsqtTileHeight;
+ auto columnPsqt = reinterpret_cast<const psqt_vec_t*>(&psqtWeights[offset]);
+
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ psqt[k] = vec_add_psqt_32(psqt[k], columnPsqt[k]);
+ }
+
+ auto accTilePsqt = reinterpret_cast<psqt_vec_t*>(
+ &accumulator.psqtAccumulation[perspective][j * PsqtTileHeight]);
+ for (std::size_t k = 0; k < NumPsqtRegs; ++k)
+ vec_store_psqt(&accTilePsqt[k], psqt[k]);
+ }
+
#else
- std::memcpy(accumulator.accumulation[c][0], biases_,
- kHalfDimensions * sizeof(BiasType));
+ std::memcpy(accumulator.accumulation[perspective], biases,
+ HalfDimensions * sizeof(BiasType));
+
+ for (std::size_t k = 0; k < PSQTBuckets; ++k)
+ accumulator.psqtAccumulation[perspective][k] = 0;
for (const auto index : active)
{
- const IndexType offset = kHalfDimensions * index;
+ const IndexType offset = HalfDimensions * index;
+
+ for (IndexType j = 0; j < HalfDimensions; ++j)
+ accumulator.accumulation[perspective][j] += weights[offset + j];
- for (IndexType j = 0; j < kHalfDimensions; ++j)
- accumulator.accumulation[c][0][j] += weights_[offset + j];
+ for (std::size_t k = 0; k < PSQTBuckets; ++k)
+ accumulator.psqtAccumulation[perspective][k] += psqtWeights[index * PSQTBuckets + k];
}
#endif
}
#endif
}
- using BiasType = std::int16_t;
- using WeightType = std::int16_t;
-
- alignas(kCacheLineSize) BiasType biases_[kHalfDimensions];
- alignas(kCacheLineSize)
- WeightType weights_[kHalfDimensions * kInputDimensions];
+ alignas(CacheLineSize) BiasType biases[HalfDimensions];
+ alignas(CacheLineSize) WeightType weights[HalfDimensions * InputDimensions];
+ alignas(CacheLineSize) PSQTWeightType psqtWeights[InputDimensions * PSQTBuckets];
};
} // namespace Stockfish::Eval::NNUE
e->blockedCount += popcount(shift<Up>(ourPawns) & (theirPawns | doubleAttackThem));
// Loop through all pawns of the current color and score each pawn
- while (b) {
- s = pop_lsb(&b);
+ while (b)
+ {
+ s = pop_lsb(b);
assert(pos.piece_on(s) == make_piece(Us, PAWN));
if (pawns & attacks_bb<KING>(ksq))
minPawnDist = 1;
else while (pawns)
- minPawnDist = std::min(minPawnDist, distance(ksq, pop_lsb(&pawns)));
+ minPawnDist = std::min(minPawnDist, distance(ksq, pop_lsb(pawns)));
return shelter - make_score(0, 16 * minPawnDist);
}
<< std::setfill(' ') << std::dec << "\nCheckers: ";
for (Bitboard b = pos.checkers(); b; )
- os << UCI::square(pop_lsb(&b)) << " ";
+ os << UCI::square(pop_lsb(b)) << " ";
if ( int(Tablebases::MaxCardinality) >= popcount(pos.pieces())
&& !pos.can_castle(ANY_CASTLING))
{
StateInfo st;
- ASSERT_ALIGNED(&st, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&st, Eval::NNUE::CacheLineSize);
Position p;
p.set(pos.fen(), pos.is_chess960(), &st, pos.this_thread());
set_castling_right(c, rsq);
}
- set_state(st);
-
// 4. En passant square.
// Ignore if square is invalid or not on side to move relative rank 6.
bool enpassant = false;
// a) side to move have a pawn threatening epSquare
// b) there is an enemy pawn in front of epSquare
// c) there is no piece on epSquare or behind epSquare
- // d) enemy pawn didn't block a check of its own color by moving forward
enpassant = pawn_attacks_bb(~sideToMove, st->epSquare) & pieces(sideToMove, PAWN)
&& (pieces(~sideToMove, PAWN) & (st->epSquare + pawn_push(~sideToMove)))
- && !(pieces() & (st->epSquare | (st->epSquare + pawn_push(sideToMove))))
- && ( file_of(square<KING>(sideToMove)) == file_of(st->epSquare)
- || !(blockers_for_king(sideToMove) & (st->epSquare + pawn_push(~sideToMove))));
+ && !(pieces() & (st->epSquare | (st->epSquare + pawn_push(sideToMove))));
}
- // It's necessary for st->previous to be intialized in this way because legality check relies on its existence
- if (enpassant) {
- st->previous = new StateInfo();
- remove_piece(st->epSquare - pawn_push(sideToMove));
- st->previous->checkersBB = attackers_to(square<KING>(~sideToMove)) & pieces(sideToMove);
- st->previous->blockersForKing[WHITE] = slider_blockers(pieces(BLACK), square<KING>(WHITE), st->previous->pinners[BLACK]);
- st->previous->blockersForKing[BLACK] = slider_blockers(pieces(WHITE), square<KING>(BLACK), st->previous->pinners[WHITE]);
- put_piece(make_piece(~sideToMove, PAWN), st->epSquare - pawn_push(sideToMove));
- }
- else
+ if (!enpassant)
st->epSquare = SQ_NONE;
// 5-6. Halfmove clock and fullmove number
chess960 = isChess960;
thisThread = th;
- st->accumulator.state[WHITE] = Eval::NNUE::INIT;
- st->accumulator.state[BLACK] = Eval::NNUE::INIT;
+ set_state(st);
return *this;
}
Square kto = relative_square(c, cr & KING_SIDE ? SQ_G1 : SQ_C1);
Square rto = relative_square(c, cr & KING_SIDE ? SQ_F1 : SQ_D1);
- castlingPath[cr] = (between_bb(rfrom, rto) | between_bb(kfrom, kto) | rto | kto)
+ castlingPath[cr] = (between_bb(rfrom, rto) | between_bb(kfrom, kto))
& ~(kfrom | rfrom);
}
for (Bitboard b = pieces(); b; )
{
- Square s = pop_lsb(&b);
+ Square s = pop_lsb(b);
Piece pc = piece_on(s);
si->key ^= Zobrist::psq[pc][s];
while (snipers)
{
- Square sniperSq = pop_lsb(&snipers);
+ Square sniperSq = pop_lsb(snipers);
Bitboard b = between_bb(s, sniperSq) & occupancy;
if (b && !more_than_one(b))
assert(color_of(moved_piece(m)) == us);
assert(piece_on(square<KING>(us)) == make_piece(us, KING));
- // st->previous->blockersForKing consider capsq as empty.
- // If pinned, it has to move along the king ray.
+ // En passant captures are a tricky special case. Because they are rather
+ // uncommon, we do it simply by testing whether the king is attacked after
+ // the move is made.
if (type_of(m) == EN_PASSANT)
- return !(st->previous->blockersForKing[sideToMove] & from)
- || aligned(from, to, square<KING>(us));
+ {
+ Square ksq = square<KING>(us);
+ Square capsq = to - pawn_push(us);
+ Bitboard occupied = (pieces() ^ from ^ capsq) | to;
+
+ assert(to == ep_square());
+ assert(moved_piece(m) == make_piece(us, PAWN));
+ assert(piece_on(capsq) == make_piece(~us, PAWN));
+ assert(piece_on(to) == NO_PIECE);
+
+ return !(attacks_bb< ROOK>(ksq, occupied) & pieces(~us, QUEEN, ROOK))
+ && !(attacks_bb<BISHOP>(ksq, occupied) & pieces(~us, QUEEN, BISHOP));
+ }
// Castling moves generation does not check if the castling path is clear of
// enemy attacks, it is delayed at a later time: now!
// If the moving piece is a king, check whether the destination square is
// attacked by the opponent.
if (type_of(piece_on(from)) == KING)
- return !(attackers_to(to) & pieces(~us));
+ return !(attackers_to(to, pieces() ^ from) & pieces(~us));
// A non-king move is legal if and only if it is not pinned or it
// is moving along the ray towards or away from the king.
if (more_than_one(checkers()))
return false;
- // Our move must be a blocking evasion or a capture of the checking piece
- if (!((between_bb(lsb(checkers()), square<KING>(us)) | checkers()) & to))
+ // Our move must be a blocking interposition or a capture of the checking piece
+ if (!(between_bb(square<KING>(us), lsb(checkers())) & to))
return false;
}
// In case of king moves under check we have to remove king so as to catch
case PROMOTION:
return attacks_bb(promotion_type(m), to, pieces() ^ from) & square<KING>(~sideToMove);
- // The double-pushed pawn blocked a check? En Passant will remove the blocker.
- // The only discovery check that wasn't handle is through capsq and fromsq
- // So the King must be in the same rank as fromsq to consider this possibility.
- // st->previous->blockersForKing consider capsq as empty.
+ // En passant capture with check? We have already handled the case
+ // of direct checks and ordinary discovered check, so the only case we
+ // need to handle is the unusual case of a discovered check through
+ // the captured pawn.
case EN_PASSANT:
- return st->previous->checkersBB
- || ( rank_of(square<KING>(~sideToMove)) == rank_of(from)
- && st->previous->blockersForKing[~sideToMove] & from);
+ {
+ Square capsq = make_square(file_of(to), rank_of(from));
+ Bitboard b = (pieces() ^ from ^ capsq) | to;
+ return (attacks_bb< ROOK>(square<KING>(~sideToMove), b) & pieces(sideToMove, QUEEN, ROOK))
+ | (attacks_bb<BISHOP>(square<KING>(~sideToMove), b) & pieces(sideToMove, QUEEN, BISHOP));
+ }
default: //CASTLING
{
// Castling is encoded as 'king captures the rook'
++st->pliesFromNull;
// Used by NNUE
- st->accumulator.state[WHITE] = Eval::NNUE::EMPTY;
- st->accumulator.state[BLACK] = Eval::NNUE::EMPTY;
+ st->accumulator.computed[WHITE] = false;
+ st->accumulator.computed[BLACK] = false;
auto& dp = st->dirtyPiece;
dp.dirty_num = 1;
}
-/// Position::do(undo)_null_move() is used to do(undo) a "null move": it flips
+/// Position::do_null_move() is used to do a "null move": it flips
/// the side to move without executing any move on the board.
void Position::do_null_move(StateInfo& newSt) {
st->dirtyPiece.dirty_num = 0;
st->dirtyPiece.piece[0] = NO_PIECE; // Avoid checks in UpdateAccumulator()
- st->accumulator.state[WHITE] = Eval::NNUE::EMPTY;
- st->accumulator.state[BLACK] = Eval::NNUE::EMPTY;
+ st->accumulator.computed[WHITE] = false;
+ st->accumulator.computed[BLACK] = false;
if (st->epSquare != SQ_NONE)
{
assert(pos_is_ok());
}
+
+/// Position::undo_null_move() must be used to undo a "null move"
+
void Position::undo_null_move() {
assert(!checkers());
if (swap <= 0)
return true;
+ assert(color_of(piece_on(from)) == sideToMove);
Bitboard occupied = pieces() ^ from ^ to;
- Color stm = color_of(piece_on(from));
+ Color stm = sideToMove;
Bitboard attackers = attackers_to(to, occupied);
Bitboard stmAttackers, bb;
int res = 1;
if (!(stmAttackers = attackers & pieces(stm)))
break;
- // Don't allow pinned pieces to attack (except the king) as long as
- // there are pinners on their original square.
+ // Don't allow pinned pieces to attack as long as there are
+ // pinners on their original square.
if (pinners(~stm) & occupied)
stmAttackers &= ~blockers_for_king(stm);
if ((swap = PawnValueMg - swap) < res)
break;
- occupied ^= lsb(bb);
+ occupied ^= least_significant_square_bb(bb);
attackers |= attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN);
}
if ((swap = KnightValueMg - swap) < res)
break;
- occupied ^= lsb(bb);
+ occupied ^= least_significant_square_bb(bb);
}
else if ((bb = stmAttackers & pieces(BISHOP)))
if ((swap = BishopValueMg - swap) < res)
break;
- occupied ^= lsb(bb);
+ occupied ^= least_significant_square_bb(bb);
attackers |= attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN);
}
if ((swap = RookValueMg - swap) < res)
break;
- occupied ^= lsb(bb);
+ occupied ^= least_significant_square_bb(bb);
attackers |= attacks_bb<ROOK>(to, occupied) & pieces(ROOK, QUEEN);
}
if ((swap = QueenValueMg - swap) < res)
break;
- occupied ^= lsb(bb);
+ occupied ^= least_significant_square_bb(bb);
attackers |= (attacks_bb<BISHOP>(to, occupied) & pieces(BISHOP, QUEEN))
| (attacks_bb<ROOK >(to, occupied) & pieces(ROOK , QUEEN));
}
Square s1 = from_sq(move);
Square s2 = to_sq(move);
- if (!(between_bb(s1, s2) & pieces()))
+ if (!((between_bb(s1, s2) ^ s2) & pieces()))
{
if (ply > i)
return true;
assert(0 && "pos_is_ok: Bitboards");
StateInfo si = *st;
- ASSERT_ALIGNED(&si, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&si, Eval::NNUE::CacheLineSize);
set_state(&si);
if (std::memcmp(&si, st, sizeof(StateInfo)))
// Not copied when making a move (will be recomputed anyhow)
Key key;
Bitboard checkersBB;
- Piece capturedPiece;
StateInfo* previous;
Bitboard blockersForKing[COLOR_NB];
Bitboard pinners[COLOR_NB];
Bitboard checkSquares[PIECE_TYPE_NB];
+ Piece capturedPiece;
int repetition;
// Used by NNUE
Bitboard blockers_for_king(Color c) const;
Bitboard check_squares(PieceType pt) const;
Bitboard pinners(Color c) const;
- bool is_discovered_check_on_king(Color c, Move m) const;
// Attacks to/from a given square
Bitboard attackers_to(Square s) const;
bool capture(Move m) const;
bool capture_or_promotion(Move m) const;
bool gives_check(Move m) const;
- bool advanced_pawn_push(Move m) const;
Piece moved_piece(Move m) const;
Piece captured_piece() const;
// Used by NNUE
StateInfo* state() const;
+ void put_piece(Piece pc, Square s);
+ void remove_piece(Square s);
+
private:
// Initialization helpers (used while setting up a position)
void set_castling_right(Color c, Square rfrom);
void set_check_info(StateInfo* si) const;
// Other helpers
- void put_piece(Piece pc, Square s);
- void remove_piece(Square s);
void move_piece(Square from, Square to);
template<bool Do>
void do_castling(Color us, Square from, Square& to, Square& rfrom, Square& rto);
int castlingRightsMask[SQUARE_NB];
Square castlingRookSquare[CASTLING_RIGHT_NB];
Bitboard castlingPath[CASTLING_RIGHT_NB];
+ Thread* thisThread;
+ StateInfo* st;
int gamePly;
Color sideToMove;
Score psq;
- Thread* thisThread;
- StateInfo* st;
bool chess960;
};
return st->checkSquares[pt];
}
-inline bool Position::is_discovered_check_on_king(Color c, Move m) const {
- return st->blockersForKing[c] & from_sq(m);
-}
-
inline bool Position::pawn_passed(Color c, Square s) const {
return !(pieces(~c, PAWN) & passed_pawn_span(c, s));
}
-inline bool Position::advanced_pawn_push(Move m) const {
- return type_of(moved_piece(m)) == PAWN
- && relative_rank(sideToMove, to_sq(m)) > RANK_6;
-}
-
inline int Position::pawns_on_same_color_squares(Color c, Square s) const {
return popcount(pieces(c, PAWN) & ((DarkSquares & s) ? DarkSquares : ~DarkSquares));
}
byTypeBB[ALL_PIECES] ^= s;
byTypeBB[type_of(pc)] ^= s;
byColorBB[color_of(pc)] ^= s;
- /* board[s] = NO_PIECE; Not needed, overwritten by the capturing one */
+ board[s] = NO_PIECE;
pieceCount[pc]--;
pieceCount[make_piece(color_of(pc), ALL_PIECES)]--;
psq -= PSQT::psq[pc][s];
namespace {
// Different node types, used as a template parameter
- enum NodeType { NonPV, PV };
+ enum NodeType { NonPV, PV, Root };
constexpr uint64_t TtHitAverageWindow = 4096;
constexpr uint64_t TtHitAverageResolution = 1024;
// Futility margin
Value futility_margin(Depth d, bool improving) {
- return Value(234 * (d - improving));
+ return Value(214 * (d - improving));
}
// Reductions lookup table, initialized at startup
Depth reduction(bool i, Depth d, int mn) {
int r = Reductions[d] * Reductions[mn];
- return (r + 503) / 1024 + (!i && r > 915);
+ return (r + 534) / 1024 + (!i && r > 904);
}
constexpr int futility_move_count(bool improving, Depth depth) {
// History and stats update bonus, based on depth
int stat_bonus(Depth d) {
- return d > 14 ? 66 : 6 * d * d + 231 * d - 206;
+ return d > 14 ? 73 : 6 * d * d + 229 * d - 215;
}
// Add a small random component to draw evaluations to avoid 3-fold blindness
Move best = MOVE_NONE;
};
- // Breadcrumbs are used to mark nodes as being searched by a given thread
- struct Breadcrumb {
- std::atomic<Thread*> thread;
- std::atomic<Key> key;
- };
- std::array<Breadcrumb, 1024> breadcrumbs;
-
- // ThreadHolding structure keeps track of which thread left breadcrumbs at the given
- // node for potential reductions. A free node will be marked upon entering the moves
- // loop by the constructor, and unmarked upon leaving that loop by the destructor.
- struct ThreadHolding {
- explicit ThreadHolding(Thread* thisThread, Key posKey, int ply) {
- location = ply < 8 ? &breadcrumbs[posKey & (breadcrumbs.size() - 1)] : nullptr;
- otherThread = false;
- owning = false;
- if (location)
- {
- // See if another already marked this location, if not, mark it ourselves
- Thread* tmp = (*location).thread.load(std::memory_order_relaxed);
- if (tmp == nullptr)
- {
- (*location).thread.store(thisThread, std::memory_order_relaxed);
- (*location).key.store(posKey, std::memory_order_relaxed);
- owning = true;
- }
- else if ( tmp != thisThread
- && (*location).key.load(std::memory_order_relaxed) == posKey)
- otherThread = true;
- }
- }
-
- ~ThreadHolding() {
- if (owning) // Free the marked location
- (*location).thread.store(nullptr, std::memory_order_relaxed);
- }
-
- bool marked() { return otherThread; }
-
- private:
- Breadcrumb* location;
- bool otherThread, owning;
- };
-
- template <NodeType NT>
+ template <NodeType nodeType>
Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, bool cutNode);
- template <NodeType NT>
+ template <NodeType nodeType>
Value qsearch(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth = 0);
Value value_to_tt(Value v, int ply);
uint64_t perft(Position& pos, Depth depth) {
StateInfo st;
- ASSERT_ALIGNED(&st, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&st, Eval::NNUE::CacheLineSize);
uint64_t cnt, nodes = 0;
const bool leaf = (depth == 2);
void Search::init() {
for (int i = 1; i < MAX_MOVES; ++i)
- Reductions[i] = int((21.3 + 2 * std::log(Threads.size())) * std::log(i + 0.25 * std::log(i)));
+ Reductions[i] = int(21.9 * std::log(i));
}
// To allow access to (ss-7) up to (ss+2), the stack must be oversized.
// The former is needed to allow update_continuation_histories(ss-1, ...),
// which accesses its argument at ss-6, also near the root.
- // The latter is needed for statScores and killer initialization.
+ // The latter is needed for statScore and killer initialization.
Stack stack[MAX_PLY+10], *ss = stack+7;
Move pv[MAX_PLY+1];
Value bestValue, alpha, beta, delta;
for (int i = 7; i > 0; i--)
(ss-i)->continuationHistory = &this->continuationHistory[0][0][NO_PIECE][0]; // Use as a sentinel
+ for (int i = 0; i <= MAX_PLY + 2; ++i)
+ (ss+i)->ply = i;
+
ss->pv = pv;
bestValue = delta = alpha = -VALUE_INFINITE;
multiPV = std::min(multiPV, rootMoves.size());
ttHitAverage = TtHitAverageWindow * TtHitAverageResolution / 2;
- int ct = int(Options["Contempt"]) * PawnValueEg / 100; // From centipawns
-
- // In analysis mode, adjust contempt in accordance with user preference
- if (Limits.infinite || Options["UCI_AnalyseMode"])
- ct = Options["Analysis Contempt"] == "Off" ? 0
- : Options["Analysis Contempt"] == "Both" ? ct
- : Options["Analysis Contempt"] == "White" && us == BLACK ? -ct
- : Options["Analysis Contempt"] == "Black" && us == WHITE ? -ct
- : ct;
-
- // Evaluation score is from the white point of view
- contempt = (us == WHITE ? make_score(ct, ct / 2)
- : -make_score(ct, ct / 2));
+ trend = SCORE_ZERO;
int searchAgainCounter = 0;
alpha = std::max(prev - delta,-VALUE_INFINITE);
beta = std::min(prev + delta, VALUE_INFINITE);
- // Adjust contempt based on root move's previousScore (dynamic contempt)
- int dct = ct + (113 - ct / 2) * prev / (abs(prev) + 147);
+ // Adjust trend based on root move's previousScore (dynamic contempt)
+ int tr = 113 * prev / (abs(prev) + 147);
- contempt = (us == WHITE ? make_score(dct, dct / 2)
- : -make_score(dct, dct / 2));
+ trend = (us == WHITE ? make_score(tr, tr / 2)
+ : -make_score(tr, tr / 2));
}
// Start with a small aspiration window and, in the case of a fail
// high/low, re-search with a bigger window until we don't fail
// high/low anymore.
- failedHighCnt = 0;
+ int failedHighCnt = 0;
while (true)
{
Depth adjustedDepth = std::max(1, rootDepth - failedHighCnt - searchAgainCounter);
- bestValue = Stockfish::search<PV>(rootPos, ss, alpha, beta, adjustedDepth, false);
+ bestValue = Stockfish::search<Root>(rootPos, ss, alpha, beta, adjustedDepth, false);
// Bring the best move to the front. It is critical that sorting
// is done with a stable algorithm because all the values but the
totBestMoveChanges += th->bestMoveChanges;
th->bestMoveChanges = 0;
}
- double bestMoveInstability = 1 + 2 * totBestMoveChanges / Threads.size();
-
+ double bestMoveInstability = 1.073 + std::max(1.0, 2.25 - 9.9 / rootDepth)
+ * totBestMoveChanges / Threads.size();
double totalTime = Time.optimum() * fallingEval * reduction * bestMoveInstability;
// Cap used time in case of a single legal move for a better viewer experience in tournaments
// search<>() is the main search function for both PV and non-PV nodes
- template <NodeType NT>
+ template <NodeType nodeType>
Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, bool cutNode) {
- constexpr bool PvNode = NT == PV;
- const bool rootNode = PvNode && ss->ply == 0;
+ constexpr bool PvNode = nodeType != NonPV;
+ constexpr bool rootNode = nodeType == Root;
const Depth maxNextDepth = rootNode ? depth : depth + 1;
// Check if we have an upcoming move which draws by repetition, or
// if the opponent had an alternative move earlier to this position.
- if ( pos.rule50_count() >= 3
+ if ( !rootNode
+ && pos.rule50_count() >= 3
&& alpha < VALUE_DRAW
- && !rootNode
&& pos.has_game_cycle(ss->ply))
{
alpha = value_draw(pos.this_thread());
// Dive into quiescence search when the depth reaches zero
if (depth <= 0)
- return qsearch<NT>(pos, ss, alpha, beta);
+ return qsearch<PvNode ? PV : NonPV>(pos, ss, alpha, beta);
assert(-VALUE_INFINITE <= alpha && alpha < beta && beta <= VALUE_INFINITE);
assert(PvNode || (alpha == beta - 1));
Move pv[MAX_PLY+1], capturesSearched[32], quietsSearched[64];
StateInfo st;
- ASSERT_ALIGNED(&st, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&st, Eval::NNUE::CacheLineSize);
TTEntry* tte;
Key posKey;
Move ttMove, move, excludedMove, bestMove;
Depth extension, newDepth;
Value bestValue, value, ttValue, eval, maxValue, probCutBeta;
- bool formerPv, givesCheck, improving, didLMR, priorCapture;
+ bool givesCheck, improving, didLMR, priorCapture;
bool captureOrPromotion, doFullDepthSearch, moveCountPruning,
ttCapture, singularQuietLMR;
Piece movedPiece;
// Step 1. Initialize node
Thread* thisThread = pos.this_thread();
- ss->inCheck = pos.checkers();
- priorCapture = pos.captured_piece();
- Color us = pos.side_to_move();
- moveCount = captureCount = quietCount = ss->moveCount = 0;
- bestValue = -VALUE_INFINITE;
- maxValue = VALUE_INFINITE;
- ss->distanceFromPv = (PvNode ? 0 : ss->distanceFromPv);
+ ss->inCheck = pos.checkers();
+ priorCapture = pos.captured_piece();
+ Color us = pos.side_to_move();
+ moveCount = captureCount = quietCount = ss->moveCount = 0;
+ bestValue = -VALUE_INFINITE;
+ maxValue = VALUE_INFINITE;
// Check for the available remaining time
if (thisThread == Threads.main())
assert(0 <= ss->ply && ss->ply < MAX_PLY);
- (ss+1)->ply = ss->ply + 1;
- (ss+1)->ttPv = false;
+ (ss+1)->ttPv = false;
(ss+1)->excludedMove = bestMove = MOVE_NONE;
- (ss+2)->killers[0] = (ss+2)->killers[1] = MOVE_NONE;
- Square prevSq = to_sq((ss-1)->currentMove);
+ (ss+2)->killers[0] = (ss+2)->killers[1] = MOVE_NONE;
+ ss->doubleExtensions = (ss-1)->doubleExtensions;
+ Square prevSq = to_sq((ss-1)->currentMove);
// Initialize statScore to zero for the grandchildren of the current position.
// So statScore is shared between all grandchildren and only the first grandchild
: ss->ttHit ? tte->move() : MOVE_NONE;
if (!excludedMove)
ss->ttPv = PvNode || (ss->ttHit && tte->is_pv());
- formerPv = ss->ttPv && !PvNode;
// Update low ply history for previous move if we are near root and position is or has been in PV
if ( ss->ttPv
if ((ss-1)->currentMove != MOVE_NULL)
ss->staticEval = eval = evaluate(pos);
else
- ss->staticEval = eval = -(ss-1)->staticEval + 2 * Tempo;
+ ss->staticEval = eval = -(ss-1)->staticEval;
// Save static evaluation into transposition table
+ if(!excludedMove)
tte->save(posKey, VALUE_NONE, ss->ttPv, BOUND_NONE, DEPTH_NONE, MOVE_NONE, eval);
}
// Use static evaluation difference to improve quiet move ordering
if (is_ok((ss-1)->currentMove) && !(ss-1)->inCheck && !priorCapture)
{
- int bonus = std::clamp(-depth * 4 * int((ss-1)->staticEval + ss->staticEval - 2 * Tempo), -1000, 1000);
+ int bonus = std::clamp(-depth * 4 * int((ss-1)->staticEval + ss->staticEval), -1000, 1000);
thisThread->mainHistory[~us][from_to((ss-1)->currentMove)] << bonus;
}
// Step 7. Futility pruning: child node (~50 Elo)
if ( !PvNode
- && depth < 9
&& eval - futility_margin(depth, improving) >= beta
&& eval < VALUE_KNOWN_WIN) // Do not return unproven wins
return eval;
// Step 8. Null move search with verification search (~40 Elo)
if ( !PvNode
&& (ss-1)->currentMove != MOVE_NULL
- && (ss-1)->statScore < 24185
+ && (ss-1)->statScore < 23767
&& eval >= beta
&& eval >= ss->staticEval
- && ss->staticEval >= beta - 24 * depth - 34 * improving + 162 * ss->ttPv + 159
+ && ss->staticEval >= beta - 20 * depth - 22 * improving + 168 * ss->ttPv + 159
&& !excludedMove
&& pos.non_pawn_material(us)
&& (ss->ply >= thisThread->nmpMinPly || us != thisThread->nmpColor))
assert(eval - beta >= 0);
// Null move dynamic reduction based on depth and value
- Depth R = (1062 + 68 * depth) / 256 + std::min(int(eval - beta) / 190, 3);
+ Depth R = (1090 + 81 * depth) / 256 + std::min(int(eval - beta) / 205, 3);
ss->currentMove = MOVE_NULL;
ss->continuationHistory = &thisThread->continuationHistory[0][0][NO_PIECE][0];
probCutBeta = beta + 209 - 44 * improving;
- // Step 9. ProbCut (~10 Elo)
+ // Step 9. ProbCut (~4 Elo)
// If we have a good enough capture and a reduced search returns a value
// much above beta, we can (almost) safely prune the previous move.
if ( !PvNode
&& ttValue != VALUE_NONE
&& ttValue < probCutBeta))
{
- // if ttMove is a capture and value from transposition table is good enough produce probCut
- // cutoff without digging into actual probCut search
- if ( ss->ttHit
- && tte->depth() >= depth - 3
- && ttValue != VALUE_NONE
- && ttValue >= probCutBeta
- && ttMove
- && pos.capture_or_promotion(ttMove))
- return probCutBeta;
-
assert(probCutBeta < VALUE_INFINITE);
+
MovePicker mp(pos, ttMove, probCutBeta - ss->staticEval, &captureHistory);
int probCutCount = 0;
bool ttPv = ss->ttPv;
ttCapture = ttMove && pos.capture_or_promotion(ttMove);
// Step 11. A small Probcut idea, when we are in check
- probCutBeta = beta + 400;
+ probCutBeta = beta + 409;
if ( ss->inCheck
&& !PvNode
&& depth >= 4
value = bestValue;
singularQuietLMR = moveCountPruning = false;
+ bool doubleExtension = false;
- // Mark this node as being searched
- ThreadHolding th(thisThread, posKey, ss->ply);
+ // Indicate PvNodes that will probably fail low if the node was searched
+ // at a depth equal or greater than the current depth, and the result of this search was a fail low.
+ bool likelyFailLow = PvNode
+ && ttMove
+ && (tte->bound() & BOUND_UPPER)
+ && tte->depth() >= depth;
// Step 12. Loop through all pseudo-legal moves until no moves remain
// or a beta cutoff occurs.
movedPiece = pos.moved_piece(move);
givesCheck = pos.gives_check(move);
- // Indicate PvNodes that will probably fail low if node was searched with non-PV search
- // at depth equal or greater to current depth and result of this search was far below alpha
- bool likelyFailLow = PvNode
- && ttMove
- && (tte->bound() & BOUND_UPPER)
- && ttValue < alpha + 200 + 100 * depth
- && tte->depth() >= depth;
-
// Calculate new depth for this move
newDepth = depth - 1;
}
else
{
- // Countermoves based pruning (~20 Elo)
- if ( lmrDepth < 4 + ((ss-1)->statScore > 0 || (ss-1)->moveCount == 1)
+ // Continuation history based pruning (~20 Elo)
+ if ( lmrDepth < 5
&& (*contHist[0])[movedPiece][to_sq(move)] < CounterMovePruneThreshold
&& (*contHist[1])[movedPiece][to_sq(move)] < CounterMovePruneThreshold)
continue;
// Futility pruning: parent node (~5 Elo)
- if ( lmrDepth < 7
- && !ss->inCheck
+ if ( !ss->inCheck
&& ss->staticEval + 174 + 157 * lmrDepth <= alpha
&& (*contHist[0])[movedPiece][to_sq(move)]
+ (*contHist[1])[movedPiece][to_sq(move)]
// then that move is singular and should be extended. To verify this we do
// a reduced search on all the other moves but the ttMove and if the
// result is lower than ttValue minus a margin, then we will extend the ttMove.
- if ( depth >= 7
+ if ( !rootNode
+ && depth >= 7
&& move == ttMove
- && !rootNode
&& !excludedMove // Avoid recursive singular search
/* && ttValue != VALUE_NONE Already implicit in the next condition */
&& abs(ttValue) < VALUE_KNOWN_WIN
&& (tte->bound() & BOUND_LOWER)
&& tte->depth() >= depth - 3)
{
- Value singularBeta = ttValue - ((formerPv + 4) * depth) / 2;
- Depth singularDepth = (depth - 1 + 3 * formerPv) / 2;
+ Value singularBeta = ttValue - 2 * depth;
+ Depth singularDepth = (depth - 1) / 2;
+
ss->excludedMove = move;
value = search<NonPV>(pos, ss, singularBeta - 1, singularBeta, singularDepth, cutNode);
ss->excludedMove = MOVE_NONE;
{
extension = 1;
singularQuietLMR = !ttCapture;
+
+ // Avoid search explosion by limiting the number of double extensions to at most 3
+ if ( !PvNode
+ && value < singularBeta - 93
+ && ss->doubleExtensions < 3)
+ {
+ extension = 2;
+ doubleExtension = true;
+ }
}
// Multi-cut pruning
return beta;
}
}
-
- // Check extension (~2 Elo)
- else if ( givesCheck
- && (pos.is_discovered_check_on_king(~us, move) || pos.see_ge(move)))
- extension = 1;
-
- // Last captures extension
- else if ( PieceValue[EG][pos.captured_piece()] > PawnValueEg
- && pos.non_pawn_material() <= 2 * RookValueMg)
+ else if ( givesCheck
+ && depth > 6
+ && abs(ss->staticEval) > Value(100))
extension = 1;
// Add extension to new depth
newDepth += extension;
+ ss->doubleExtensions = (ss-1)->doubleExtensions + (extension == 2);
// Speculative prefetch as early as possible
prefetch(TT.first_entry(pos.key_after(move)));
// Step 15. Make the move
pos.do_move(move, st, givesCheck);
- (ss+1)->distanceFromPv = ss->distanceFromPv + moveCount - 1;
-
// Step 16. Late moves reduction / extension (LMR, ~200 Elo)
// We use various heuristics for the sons of a node after the first son has
// been searched. In general we would like to reduce them, but there are many
if ( depth >= 3
&& moveCount > 1 + 2 * rootNode
&& ( !captureOrPromotion
- || moveCountPruning
- || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
- || cutNode
- || (!PvNode && !formerPv && captureHistory[movedPiece][to_sq(move)][type_of(pos.captured_piece())] < 3678)
- || thisThread->ttHitAverage < 432 * TtHitAverageResolution * TtHitAverageWindow / 1024))
+ || (cutNode && (ss-1)->moveCount > 1)
+ || !ss->ttPv)
+ && (!PvNode || ss->ply > 1 || thisThread->id() % 4 != 3))
{
Depth r = reduction(improving, depth, moveCount);
- // Decrease reduction if the ttHit running average is large
- if (thisThread->ttHitAverage > 537 * TtHitAverageResolution * TtHitAverageWindow / 1024)
+ if (PvNode)
r--;
- // Increase reduction if other threads are searching this position
- if (th.marked())
- r++;
+ // Decrease reduction if the ttHit running average is large (~0 Elo)
+ if (thisThread->ttHitAverage > 537 * TtHitAverageResolution * TtHitAverageWindow / 1024)
+ r--;
// Decrease reduction if position is or has been on the PV
- // and node is not likely to fail low. (~10 Elo)
- if (ss->ttPv && !likelyFailLow)
+ // and node is not likely to fail low. (~3 Elo)
+ if ( ss->ttPv
+ && !likelyFailLow)
r -= 2;
// Increase reduction at root and non-PV nodes when the best move does not change frequently
- if ((rootNode || !PvNode) && thisThread->rootDepth > 10 && thisThread->bestMoveChanges <= 2)
- r++;
-
- // More reductions for late moves if position was not in previous PV
- if (moveCountPruning && !formerPv)
+ if ( (rootNode || !PvNode)
+ && thisThread->bestMoveChanges <= 2)
r++;
- // Decrease reduction if opponent's move count is high (~5 Elo)
+ // Decrease reduction if opponent's move count is high (~1 Elo)
if ((ss-1)->moveCount > 13)
r--;
- // Decrease reduction if ttMove has been singularly extended (~3 Elo)
+ // Decrease reduction if ttMove has been singularly extended (~1 Elo)
if (singularQuietLMR)
r--;
- if (captureOrPromotion)
- {
- // Unless giving check, this capture is likely bad
- if ( !givesCheck
- && ss->staticEval + PieceValue[EG][pos.captured_piece()] + 210 * depth <= alpha)
- r++;
- }
- else
+ // Increase reduction for cut nodes (~3 Elo)
+ if (cutNode && move != ss->killers[0])
+ r += 2;
+
+ if (!captureOrPromotion)
{
- // Increase reduction if ttMove is a capture (~5 Elo)
+ // Increase reduction if ttMove is a capture (~3 Elo)
if (ttCapture)
r++;
- // Increase reduction at root if failing high
- r += rootNode ? thisThread->failedHighCnt * thisThread->failedHighCnt * moveCount / 512 : 0;
-
- // Increase reduction for cut nodes (~10 Elo)
- if (cutNode)
- r += 2;
-
- // Decrease reduction for moves that escape a capture. Filter out
- // castling moves, because they are coded as "king captures rook" and
- // hence break make_move(). (~2 Elo)
- else if ( type_of(move) == NORMAL
- && !pos.see_ge(reverse_move(move)))
- r -= 2 + ss->ttPv - (type_of(movedPiece) == PAWN);
-
ss->statScore = thisThread->mainHistory[us][from_to(move)]
+ (*contHist[0])[movedPiece][to_sq(move)]
+ (*contHist[1])[movedPiece][to_sq(move)]
+ (*contHist[3])[movedPiece][to_sq(move)]
- - 4741;
-
- // Decrease/increase reduction by comparing opponent's stat score (~10 Elo)
- if (ss->statScore >= -89 && (ss-1)->statScore < -116)
- r--;
-
- else if ((ss-1)->statScore >= -112 && ss->statScore < -100)
- r++;
+ - 4923;
// Decrease/increase reduction for moves with a good/bad history (~30 Elo)
- // If we are not in check use statScore, but if we are in check we use
- // the sum of main history and first continuation history with an offset.
- if (ss->inCheck)
- r -= (thisThread->mainHistory[us][from_to(move)]
- + (*contHist[0])[movedPiece][to_sq(move)] - 3833) / 16384;
- else
- r -= ss->statScore / 14790;
+ if (!ss->inCheck)
+ r -= ss->statScore / 14721;
}
- // In general we want to cap the LMR depth search at newDepth. But for nodes
- // close to the principal variation the cap is at (newDepth + 1), which will
- // allow these nodes to be searched deeper than the pv (up to 4 plies deeper).
- Depth d = std::clamp(newDepth - r, 1, newDepth + ((ss+1)->distanceFromPv <= 4));
+ // In general we want to cap the LMR depth search at newDepth. But if
+ // reductions are really negative and movecount is low, we allow this move
+ // to be searched deeper than the first move, unless ttMove was extended by 2.
+ Depth d = std::clamp(newDepth - r, 1, newDepth + (r < -1 && moveCount <= 5 && !doubleExtension));
value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, d, true);
else
{
assert(value >= beta); // Fail high
- ss->statScore = 0;
break;
}
}
assert(moveCount || !ss->inCheck || excludedMove || !MoveList<LEGAL>(pos).size());
if (!moveCount)
- bestValue = excludedMove ? alpha
- : ss->inCheck ? mated_in(ss->ply) : VALUE_DRAW;
+ bestValue = excludedMove ? alpha :
+ ss->inCheck ? mated_in(ss->ply)
+ : VALUE_DRAW;
// If there is a move which produces search value greater than alpha we update stats of searched moves
else if (bestMove)
// qsearch() is the quiescence search function, which is called by the main search
// function with zero depth, or recursively with further decreasing depth per call.
- template <NodeType NT>
+ template <NodeType nodeType>
Value qsearch(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth) {
- constexpr bool PvNode = NT == PV;
+ static_assert(nodeType != Root);
+ constexpr bool PvNode = nodeType == PV;
assert(alpha >= -VALUE_INFINITE && alpha < beta && beta <= VALUE_INFINITE);
assert(PvNode || (alpha == beta - 1));
Move pv[MAX_PLY+1];
StateInfo st;
- ASSERT_ALIGNED(&st, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&st, Eval::NNUE::CacheLineSize);
TTEntry* tte;
Key posKey;
}
Thread* thisThread = pos.this_thread();
- (ss+1)->ply = ss->ply + 1;
bestMove = MOVE_NONE;
ss->inCheck = pos.checkers();
moveCount = 0;
// and addition of two tempos
ss->staticEval = bestValue =
(ss-1)->currentMove != MOVE_NULL ? evaluate(pos)
- : -(ss-1)->staticEval + 2 * Tempo;
+ : -(ss-1)->staticEval;
// Stand pat. Return immediately if static value is at least beta
if (bestValue >= beta)
// Initialize a MovePicker object for the current position, and prepare
// to search the moves. Because the depth is <= 0 here, only captures,
- // queen and checking knight promotions, and other checks(only if depth >= DEPTH_QS_CHECKS)
+ // queen promotions, and other checks (only if depth >= DEPTH_QS_CHECKS)
// will be generated.
MovePicker mp(pos, ttMove, depth, &thisThread->mainHistory,
&thisThread->captureHistory,
if ( bestValue > VALUE_TB_LOSS_IN_MAX_PLY
&& !givesCheck
&& futilityBase > -VALUE_KNOWN_WIN
- && !pos.advanced_pawn_push(move))
+ && type_of(move) != PROMOTION)
{
if (moveCount > 2)
[pos.moved_piece(move)]
[to_sq(move)];
- // CounterMove based pruning
+ // Continuation history based pruning
if ( !captureOrPromotion
&& bestValue > VALUE_TB_LOSS_IN_MAX_PLY
&& (*contHist[0])[pos.moved_piece(move)][to_sq(move)] < CounterMovePruneThreshold
// Make and search the move
pos.do_move(move, st, givesCheck);
- value = -qsearch<NT>(pos, ss+1, -beta, -alpha, depth - 1);
+ value = -qsearch<nodeType>(pos, ss+1, -beta, -alpha, depth - 1);
pos.undo_move(move);
assert(value > -VALUE_INFINITE && value < VALUE_INFINITE);
bool RootMove::extract_ponder_from_tt(Position& pos) {
StateInfo st;
- ASSERT_ALIGNED(&st, Eval::NNUE::kCacheLineSize);
+ ASSERT_ALIGNED(&st, Eval::NNUE::CacheLineSize);
bool ttHit;
Value staticEval;
int statScore;
int moveCount;
- int distanceFromPv;
bool inCheck;
bool ttPv;
bool ttHit;
+ int doubleExtensions;
};
template<typename T, int LE> T number(void* addr)
{
- static const union { uint32_t i; char c[4]; } Le = { 0x01020304 };
- static const bool IsLittleEndian = (Le.c[0] == 4);
-
T v;
if ((uintptr_t)addr & (alignof(T) - 1)) // Unaligned pointer (very rare)
std::stringstream ss(Paths);
std::string path;
- while (std::getline(ss, path, SepChar)) {
+ while (std::getline(ss, path, SepChar))
+ {
fname = path + "/" + f;
std::ifstream::open(fname);
if (is_open())
int buf64Size = 64;
Sym sym;
- while (true) {
+ while (true)
+ {
int len = 0; // This is the symbol length - d->min_sym_len
// Now get the symbol length. For any symbol s64 of length l right-padded
// We binary-search for our value recursively expanding into the left and
// right child symbols until we reach a leaf node where symlen[sym] + 1 == 1
// that will store the value we need.
- while (d->symlen[sym]) {
-
+ while (d->symlen[sym])
+ {
Sym left = d->btree[sym].get<LR::Left>();
// If a symbol contains 36 sub-symbols (d->symlen[sym] + 1 = 36) and
leadPawns = b = pos.pieces(color_of(pc), PAWN);
do
- squares[size++] = pop_lsb(&b) ^ flipSquares;
+ squares[size++] = pop_lsb(b) ^ flipSquares;
while (b);
leadPawnsCnt = size;
// directly map them to the correct color and square.
b = pos.pieces() ^ leadPawns;
do {
- Square s = pop_lsb(&b);
+ Square s = pop_lsb(b);
squares[size] = s ^ flipSquares;
pieces[size++] = Piece(pos.piece_on(s) ^ flipColor);
} while (b);
WDLScore wdl = -probe_wdl(pos, &result);
dtz = dtz_before_zeroing(wdl);
}
+ else if (pos.is_draw(1))
+ {
+ // In case a root move leads to a draw by repetition or
+ // 50-move rule, we set dtz to zero. Note: since we are
+ // only 1 ply from the root, this must be a true 3-fold
+ // repetition inside the game history.
+ dtz = 0;
+ }
else
{
// Otherwise, take dtz for the new position and correct by 1 ply
ProbeState result;
StateInfo st;
+ WDLScore wdl;
bool rule50 = Options["Syzygy50MoveRule"];
{
pos.do_move(m.pv[0], st);
- WDLScore wdl = -probe_wdl(pos, &result);
+ if (pos.is_draw(1))
+ wdl = WDLDraw;
+ else
+ wdl = -probe_wdl(pos, &result);
pos.undo_move(m.pv[0]);
void ThreadPool::set(size_t requested) {
- if (size() > 0) { // destroy any existing thread(s)
+ if (size() > 0) // destroy any existing thread(s)
+ {
main()->wait_for_search_finished();
while (size() > 0)
delete back(), pop_back();
}
- if (requested > 0) { // create new thread(s)
+ if (requested > 0) // create new thread(s)
+ {
push_back(new MainThread(0));
while (size() < requested)
void idle_loop();
void start_searching();
void wait_for_search_finished();
+ size_t id() const { return idx; }
Pawns::Table pawnsTable;
Material::Table materialTable;
LowPlyHistory lowPlyHistory;
CapturePieceToHistory captureHistory;
ContinuationHistory continuationHistory[2][2];
- Score contempt;
- int failedHighCnt;
+ Score trend;
};
bool Tune::update_on_last;
const UCI::Option* LastOption = nullptr;
-BoolConditions Conditions;
static std::map<std::string, int> TuneResults;
string Tune::next(string& names, bool pop) {
template<> void Tune::Entry<Tune::PostUpdate>::init_option() {}
template<> void Tune::Entry<Tune::PostUpdate>::read_option() { value(); }
-
-// Set binary conditions according to a probability that depends
-// on the corresponding parameter value.
-
-void BoolConditions::set() {
-
- static PRNG rng(now());
- static bool startup = true; // To workaround fishtest bench
-
- for (size_t i = 0; i < binary.size(); i++)
- binary[i] = !startup && (values[i] + int(rng.rand<unsigned>() % variance) > threshold);
-
- startup = false;
-
- for (size_t i = 0; i < binary.size(); i++)
- sync_cout << binary[i] << sync_endl;
-}
-
} // namespace Stockfish
#define SetDefaultRange SetRange(default_range)
-/// BoolConditions struct is used to tune boolean conditions in the
-/// code by toggling them on/off according to a probability that
-/// depends on the value of a tuned integer parameter: for high
-/// values of the parameter condition is always disabled, for low
-/// values is always enabled, otherwise it is enabled with a given
-/// probability that depnends on the parameter under tuning.
-
-struct BoolConditions {
- void init(size_t size) { values.resize(size, defaultValue), binary.resize(size, 0); }
- void set();
-
- std::vector<int> binary, values;
- int defaultValue = 465, variance = 40, threshold = 500;
- SetRange range = SetRange(0, 1000);
-};
-
-extern BoolConditions Conditions;
-
-inline void set_conditions() { Conditions.set(); }
-
-
/// Tune class implements the 'magic' code that makes the setup of a fishtest
/// tuning session as easy as it can be. Mainly you have just to remove const
/// qualifiers from the variables you want to tune and flag them for tuning, so
return add(value, (next(names), std::move(names)), args...);
}
- // Template specialization for BoolConditions
- template<typename... Args>
- int add(const SetRange& range, std::string&& names, BoolConditions& cond, Args&&... args) {
- for (size_t size = cond.values.size(), i = 0; i < size; i++)
- add(cond.range, next(names, i == size - 1) + "_" + std::to_string(i), cond.values[i]);
- return add(range, std::move(names), args...);
- }
-
std::vector<std::unique_ptr<EntryBase>> list;
public:
#define UPDATE_ON_LAST() bool UNIQUE(p, __LINE__) = Tune::update_on_last = true
-// Some macro to tune toggling of boolean conditions
-#define CONDITION(x) (Conditions.binary[__COUNTER__] || (x))
-#define TUNE_CONDITIONS() int UNIQUE(c, __LINE__) = (Conditions.init(__COUNTER__), 0); \
- TUNE(Conditions, set_conditions)
-
} // namespace Stockfish
#endif // #ifndef TUNE_H_INCLUDED
BishopValueMg = 825, BishopValueEg = 915,
RookValueMg = 1276, RookValueEg = 1380,
QueenValueMg = 2538, QueenValueEg = 2682,
- Tempo = 28,
MidgameLimit = 15258, EndgameLimit = 3915
};
// Coefficients of a 3rd order polynomial fit based on fishtest data
// for two parameters needed to transform eval to the argument of a
// logistic function.
- double as[] = {-8.24404295, 64.23892342, -95.73056462, 153.86478679};
- double bs[] = {-3.37154371, 28.44489198, -56.67657741, 72.05858751};
+ double as[] = {-3.68389304, 30.07065921, -60.52878723, 149.53378557};
+ double bs[] = {-2.0181857, 15.85685038, -29.83452023, 47.59078827};
double a = (((as[0] * m + as[1]) * m + as[2]) * m) + as[3];
double b = (((bs[0] * m + bs[1]) * m + bs[2]) * m) + bs[3];
// Transform eval to centipawns with limited range
- double x = std::clamp(double(100 * v) / PawnValueEg, -1000.0, 1000.0);
+ double x = std::clamp(double(100 * v) / PawnValueEg, -2000.0, 2000.0);
// Return win rate in per mille (rounded to nearest)
return int(0.5 + 1000 / (1 + std::exp((a - x) / b)));
else if (token == "d") sync_cout << pos << sync_endl;
else if (token == "eval") trace_eval(pos);
else if (token == "compiler") sync_cout << compiler_info() << sync_endl;
+ else if (token == "export_net")
+ {
+ std::optional<std::string> filename;
+ std::string f;
+ if (is >> skipws >> f)
+ filename = f;
+ Eval::NNUE::save_eval(filename);
+ }
else if (!token.empty() && token[0] != '#')
sync_cout << "Unknown command: " << cmd << sync_endl;
constexpr int MaxHashMB = Is64Bit ? 33554432 : 2048;
o["Debug Log File"] << Option("", on_logger);
- o["Contempt"] << Option(24, -100, 100);
- o["Analysis Contempt"] << Option("Both var Off var White var Black var Both", "Both");
o["Threads"] << Option(1, 1, 512, on_threads);
o["Hash"] << Option(16, 1, MaxHashMB, on_hash_size);
o["Clear Hash"] << Option(on_clear_hash);
--valgrind)
echo "valgrind testing started"
prefix=''
- exeprefix='valgrind --error-exitcode=42'
+ exeprefix='valgrind --error-exitcode=42 --errors-for-leak-kinds=all --leak-check=full'
postfix='1>/dev/null'
threads="1"
;;
expect "bestmove"
send "position fen 5rk1/1K4p1/8/8/3B4/8/8/8 b - - 0 1\n"
- send "go depth 20\n"
+ send "go depth 10\n"
expect "bestmove"
send "quit\n"
echo "reprosearch testing started"
-# repeat two short games, separated by ucinewgame.
+# repeat two short games, separated by ucinewgame.
# with go nodes $nodes they should result in exactly
# the same node count for each iteration.
cat << EOF > repeat.exp
projects / stockfish / commitdiff