| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: notruck
Date: Tue Aug 18 08:19:22 2020 +0200 Timestamp: 1597731562 Support building for Android using NDK The easiest way to use the NDK in conjunction with this Makefile (tested on linux-x86_64): 1. Download the latest NDK (r21d) from Google from https://developer.android.com/ndk/downloads 2. Place and unzip the NDK in $HOME/ndk folder 3. Export the path variable e.g., `export PATH=$PATH:$HOME/ndk/android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin` 4. cd to your Stockfish/src dir 5. Issue `make -j ARCH=armv8 COMP=ndk build` (use `ARCH=armv7` or `ARCH=armv7-neon` for older CPUs) 6. Optionally `make -j ARCH=armv8 COMP=ndk strip` 7. That's all. Enjoy! Improves support from Raspberry Pi (incomplete?) and compiling on arm in general closes https://github.com/official-stockfish/Stockfish/pull/3015 fixes https://github.com/official-stockfish/Stockfish/issues/2860 fixes https://github.com/official-stockfish/Stockfish/issues/2641 Support is still fragile as we're missing CI on these targets. Nevertheless tested with: ```bash # build crosses from ubuntu 20.04 on x86 to various arch/OS combos # tested with suitable packages installed # (build-essentials, mingw-w64, g++-arm-linux-gnueabihf, NDK (r21d) from google) # cross to Android export PATH=$HOME/ndk/android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH make clean && make -j build ARCH=armv7 COMP=ndk && make -j build ARCH=armv7 COMP=ndk strip make clean && make -j build ARCH=armv7-neon COMP=ndk && make -j build ARCH=armv7-neon COMP=ndk strip make clean && make -j build ARCH=armv8 COMP=ndk && make -j build ARCH=armv8 COMP=ndk strip # cross to Raspberry Pi make clean && make -j build ARCH=armv7 COMP=gcc COMPILER=arm-linux-gnueabihf-g++ make clean && make -j build ARCH=armv7-neon COMP=gcc COMPILER=arm-linux-gnueabihf-g++ # cross to Windows make clean && make -j build ARCH=x86-64-modern COMP=mingw ``` No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Unai Corzo
Date: Mon Aug 17 12:27:35 2020 +0200 Timestamp: 1597660055 Simplify away the passed pawn extension STC https://tests.stockfishchess.org/tests/view/5f3955f0e98b6c64b3df41d7 LLR: 2.96 (-2.94,2.94) {-1.50,0.50} Total: 31992 W: 3611 L: 3548 D: 24833 Elo +0.68 Ptnml(0-2): 174, 2658, 10273, 2713, 178 LTC https://tests.stockfishchess.org/tests/view/5f399e41e98b6c64b3df4210 LLR: 3.01 (-2.94,2.94) {-1.50,0.50} Total: 29568 W: 1488 L: 1480 D: 26600 Elo +0.09 Ptnml(0-2): 40, 1272, 12142, 1300, 30 closes https://github.com/official-stockfish/Stockfish/pull/3017 bench: 3844671 ----- Recommended net: https://tests.stockfishchess.org/api/nn/nn-82215d0fd0df.nnue see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stéphane Nicolet
Date: Mon Aug 17 12:15:57 2020 +0200 Timestamp: 1597659357 Reformat code in little-endian patch Reformat code and rename the function to "read_little_endian()" in the recent commit by Ronald de Man for support of big endian systems. closes https://github.com/official-stockfish/Stockfish/pull/3016 No functional change ----- Recommended net: https://tests.stockfishchess.org/api/nn/nn-82215d0fd0df.nnue see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Sun Aug 16 21:10:26 2020 +0200 Timestamp: 1597605026 Add further targets to travis testing general-32, general-64 and help closes https://github.com/official-stockfish/Stockfish/pull/3014 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: syzygy1
Date: Sun Aug 16 21:10:26 2020 +0200 Timestamp: 1597605026 Assume network file is in little-endian byte order This patch fixes the byte order when reading 16- and 32-bit values from the network file on a big-endian machine. Bytes are ordered in read_le() using unsigned arithmetic, which doesn't need tricks to determine the endianness of the machine. Unfortunately the compiler doesn't seem to be able to optimise the ordering operation, but reading in the weights is not a time-critical operation and the extra time it takes should not be noticeable. Big endian systems are still untested with NNUE. fixes #3007 closes https://github.com/official-stockfish/Stockfish/pull/3009 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Daylen Yang
Date: Sun Aug 16 21:10:26 2020 +0200 Timestamp: 1597605026 Display NEON in compiler string if NEON intrinsics are being used and USE_NEON is defined. closes https://github.com/official-stockfish/Stockfish/pull/3008 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Sun Aug 16 08:20:32 2020 +0200 Timestamp: 1597558832 Use NNUE more for fortresses Increases the use of NNUE evaluation in positions without captures/pawn moves, by increasing the NNUEThreshold threshold with rule50_count. This patch will force Stockfish to use NNUE eval more and more in materially unbalanced positions, when it seems that the classical eval is struggling to win and only manages to shuffle. This will ask the (slower) NNUE eval to double-check the potential fortress branches of the search tree, but only when necessary. passed STC: https://tests.stockfishchess.org/tests/view/5f36f1bf11a9b1a1dbf192d8 LLR: 2.93 (-2.94,2.94) {-0.50,1.50} Total: 51824 W: 5836 L: 5653 D: 40335 Elo +1.23 Ptnml(0-2): 264, 4356, 16512, 4493, 287 passed LTC: https://tests.stockfishchess.org/tests/view/5f37836111a9b1a1dbf1936d LLR: 2.93 (-2.94,2.94) {0.25,1.75} Total: 29768 W: 1747 L: 1590 D: 26431 Elo +1.83 Ptnml(0-2): 33, 1347, 11977, 1484, 43 closes https://github.com/official-stockfish/Stockfish/pull/3011 Bench: 4173967 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Fri Aug 14 16:39:52 2020 +0200 Timestamp: 1597415992 Try to match relative magnitude of NNUE eval to classical The idea is that since we are mixing NNUE and classical evals matching their magnitudes closer allows for better comparisons. STC https://tests.stockfishchess.org/tests/view/5f35a65411a9b1a1dbf18e2b LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 9840 W: 1150 L: 1027 D: 7663 Elo +4.34 Ptnml(0-2): 49, 772, 3175, 855, 69 LTC https://tests.stockfishchess.org/tests/view/5f35bcbe11a9b1a1dbf18e47 LLR: 2.93 (-2.94,2.94) {0.25,1.75} Total: 44424 W: 2492 L: 2294 D: 39638 Elo +1.55 Ptnml(0-2): 42, 2015, 17915, 2183, 57 also corrects the location to clamp the evaluation (non-function on bench). closes https://github.com/official-stockfish/Stockfish/pull/3003 bench: 3905447 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Miguel Lahoz
Date: Fri Aug 14 16:31:18 2020 +0200 Timestamp: 1597415478 Also dampen NNUE eval with 50 move rule Move the existing dampening function last so that NNUE evaluations are also handled as we approach the 50 move rule. STC: LLR: 2.95 (-2.94,2.94) {-0.50,1.50} Total: 4792 W: 695 L: 561 D: 3536 Elo +9.72 Ptnml(0-2): 19, 420, 1422, 478, 57 https://tests.stockfishchess.org/tests/view/5f3164179081672066537534 LTC: LLR: 8.62 (-2.94,2.94) {0.25,1.75} Total: 286744 W: 18494 L: 17430 D: 250820 Elo +1.29 Ptnml(0-2): 418, 14886, 111745, 15860, 463 https://tests.stockfishchess.org/tests/view/5f316b039081672066537541 closes https://github.com/official-stockfish/Stockfish/pull/3004 Bench: 4001800 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Fri Aug 14 16:20:42 2020 +0200 Timestamp: 1597414842 Verify SHA of downloaded net file check SHA of the available and downloaded file. Document the format requirement on the default net. Also allow curl to make possibly insecure connections, as needed for old curl. fixes https://github.com/official-stockfish/Stockfish/issues/2998 closes https://github.com/official-stockfish/Stockfish/pull/3000 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stéphane Nicolet
Date: Fri Aug 14 16:18:50 2020 +0200 Timestamp: 1597414730 Clean-up Makefile help Do not show the details of the default architecture for a simple "make help" invocation, as the details are most likely to confuse beginners. Instead we make it clear which architecture is the default and put an example at the end of the Makefile as an incentative to use "make help ARCH=blah" to discover the flags used by the different architectures. ``` make help make help ARCH=x86-64-ssse3 ``` Also clean-up and modernize a bit the Makefile examples while at it. closes https://github.com/official-stockfish/Stockfish/pull/2996 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Sergio Vieri
Date: Thu Aug 13 07:50:52 2020 +0200 Timestamp: 1597297852 Update default net to nn-82215d0fd0df.nnue Net created at: 20200812-2257 passed STC: https://tests.stockfishchess.org/tests/view/5f340ca99e5f2effc089da17 LLR: 2.96 (-2.94,2.94) {-0.50,1.50} Total: 5744 W: 756 L: 627 D: 4361 Elo +7.80 Ptnml(0-2): 28, 485, 1731, 586, 42 passed LTC: https://tests.stockfishchess.org/tests/view/5f341eba9e5f2effc089da23 LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 17136 W: 1041 L: 917 D: 15178 Elo +2.51 Ptnml(0-2): 13, 813, 6807, 907, 28 closes https://github.com/official-stockfish/Stockfish/pull/2992 Bench: 3935117 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Thu Aug 13 07:41:06 2020 +0200 Timestamp: 1597297266 Output the SSE2 flag in compiler_info was missing in the list of outputs, slightly reorder flags. explicitly add -msse2 if USE_SSE2 (is implicit already, -msse -m64). closes https://github.com/official-stockfish/Stockfish/pull/2990 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Thu Aug 13 07:39:52 2020 +0200 Timestamp: 1597297192 Add support for VNNI Adds support for Vector Neural Network Instructions (avx512), as available on Intel Cascade Lake The _mm512_dpbusd_epi32() intrinsic (vpdpbusd instruction) is taylor made for NNUE. on a cascade lake CPU (AWS C5.24x.large, gcc 10) NNUE eval is at roughly 78% nps of classical (single core test) bench 1024 1 24 default depth: target classical NNUE ratio vnni 2207232 1725987 78.20 avx512 2216789 1671734 75.41 avx2 2194006 1611263 73.44 modern 2185001 1352469 61.90 closes https://github.com/official-stockfish/Stockfish/pull/2987 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Daylen Yang
Date: Wed Aug 12 07:49:36 2020 +0200 Timestamp: 1597211376 Use posix_memalign for Apple Silicon instead of _mm_malloc fails to build on that target, because of missing Intel Intrinsics. macOS has posix_memalign() since ~2014 so we can simplify the code and just use that for all Apple platforms. closes https://github.com/official-stockfish/Stockfish/pull/2985 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Tue Aug 11 23:35:02 2020 +0200 Timestamp: 1597181702 Restrict avx2 hack to windows target this workaround is possibly rather a windows & gcc specific problem. See e.g. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54412#c25 on Linux with gcc 8 this patch brings roughly a 8% speedup. However, probably needs some testing in the wild. includes a workaround for an old msys make (3.81) installation (fixes #2984) No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Tue Aug 11 13:46:02 2020 +0200 Timestamp: 1597146362 Tweak castling extension Change condition from three friendly pieces to two. This now means that we only extend castling on the king side if there are no other friendly pieces aside from king and rook. For the queen side, we only extend if there is only a rook and another friendly piece or if there is only a single rook and no other friendly piece but this is very rare. STC: LLR: 3.20 (-2.94,2.94) {-0.50,1.50} Total: 31144 W: 4086 L: 3903 D: 23155 Elo +2.04 Ptnml(0-2): 227, 2843, 9278, 2968, 256 https://tests.stockfishchess.org/tests/view/5f31487f9081672066537516 LTC: LLR: 2.93 (-2.94,2.94) {0.25,1.75} Total: 57816 W: 3786 L: 3538 D: 50492 Elo +1.49 Ptnml(0-2): 92, 2991, 22488, 3251, 86 https://tests.stockfishchess.org/tests/view/5f3167c3908167206653753d closes https://github.com/official-stockfish/Stockfish/pull/2980 Bench: 4244812 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Guy Vreuls
Date: Tue Aug 11 08:17:03 2020 +0200 Timestamp: 1597126623 This commit enables a mixed bench, to improve CI and allow for PGO (profile-build) of the NNUE part of the code. Joint work gvreuls / vondele * Download the default NNUE net in AppVeyor * Download net in travis CI `make net` * Adjust tests to cover more archs, speedup instrumented testing * Introduce 'mixed' bench as default, with further options: classical, NNUE, mixed. mixed (default) and NNUE require the default net to be present, which can be obtained with ``` make net ``` Further examples (first is equivalent to `./stockfish bench`): ``` ./stockfish bench 16 1 13 default depth mixed ./stockfish bench 16 1 13 default depth classical ./stockfish bench 16 1 13 default depth NNUE ``` The net is now downloaded automatically if needed for `profile-build` (usual `build` works fine without net present) PGO gives a nice speedup on fishtest: passed STC: LLR: 2.93 (-2.94,2.94) {-0.50,1.50} Total: 3360 W: 469 L: 343 D: 2548 Elo +13.03 Ptnml(0-2): 20, 246, 1030, 356, 28 https://tests.stockfishchess.org/tests/view/5f31b5499081672066537569 passed LTC: LLR: 2.97 (-2.94,2.94) {0.25,1.75} Total: 8824 W: 609 L: 502 D: 7713 Elo +4.21 Ptnml(0-2): 8, 430, 3438, 519, 17 https://tests.stockfishchess.org/tests/view/5f31c87b908167206653757c closes https://github.com/official-stockfish/Stockfish/pull/2931 fixes https://github.com/official-stockfish/Stockfish/issues/2907 requires fishtest updates before commit Bench: 4290577 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Tue Aug 11 08:17:03 2020 +0200 Timestamp: 1597126623 Fix AVX512 build with older compilers avoids an intrinsic that is missing in gcc < 10. For this target, might trigger another gcc bug on windows that requires up-to-date gcc 8, 9, or 10, or usage of clang. Fixes https://github.com/official-stockfish/Stockfish/issues/2975 closes https://github.com/official-stockfish/Stockfish/pull/2976 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Tue Aug 11 08:17:03 2020 +0200 Timestamp: 1597126623 More aligned_alloc changes to support Android Move to posix_memalign for those platforms, in particular android, that do not fully support c++17 std::aligned_alloc() (and are not windows) see https://github.com/official-stockfish/Stockfish/issues/2860 closes https://github.com/official-stockfish/Stockfish/pull/2973 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Guy Vreuls
Date: Tue Aug 11 08:17:03 2020 +0200 Timestamp: 1597126623 Fix parallel LTO issues on Windows This adds -save-temps to the linker flags when parallel LTO is used on MinGW/MSYS. fixes #2977 closes https://github.com/official-stockfish/Stockfish/pull/2978 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Vizvezdenec
Date: Tue Aug 11 08:17:03 2020 +0200 Timestamp: 1597126623 Add comments to probCut code and rename a variable closes https://github.com/official-stockfish/Stockfish/pull/2819 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Unai Corzo
Date: Mon Aug 10 19:17:57 2020 +0200 Timestamp: 1597079877 Assorted search parameter tune STC https://tests.stockfishchess.org/tests/view/5f31219090816720665374ec LLR: 2.96 (-2.94,2.94) {-0.50,1.50} Total: 3376 W: 487 L: 359 D: 2530 Elo +13.18 Ptnml(0-2): 17, 253, 1042, 337, 39 LTC https://tests.stockfishchess.org/tests/view/5f3127f79081672066537502 LLR: 2.93 (-2.94,2.94) {0.25,1.75} Total: 8360 W: 581 L: 475 D: 7304 Elo +4.41 Ptnml(0-2): 11, 407, 3238, 513, 11 closes https://github.com/official-stockfish/Stockfish/pull/2971 bench: 4733874 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Fanael Linithien
Date: Mon Aug 10 19:17:57 2020 +0200 Timestamp: 1597079877 Provide vectorized NNUE code for SSE2 and MMX targets This patch allows old x86 CPUs, from AMD K8 (which the x86-64 baseline targets) all the way down to the Pentium MMX, to benefit from NNUE with comparable performance hit versus hand-written eval as on more modern processors. NPS of the bench with NNUE enabled on a Pentium III 1.13 GHz (using the MMX code): master: 38951 this patch: 80586 NPS of the bench with NNUE enabled using baseline x86-64 arch, which is how linux distros are likely to package stockfish, on a modern CPU (using the SSE2 code): master: 882584 this patch: 1203945 closes https://github.com/official-stockfish/Stockfish/pull/2956 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Mon Aug 10 14:38:17 2020 +0200 Timestamp: 1597063097 Cleanup and optimize SSE/AVX code AVX512 +4% faster AVX2 +1% faster SSSE3 +5% faster passed non-regression STC: STC https://tests.stockfishchess.org/tests/view/5f31249f90816720665374f6 LLR: 2.96 (-2.94,2.94) {-1.50,0.50} Total: 17576 W: 2344 L: 2245 D: 12987 Elo +1.96 Ptnml(0-2): 127, 1570, 5292, 1675, 124 closes https://github.com/official-stockfish/Stockfish/pull/2962 No functional change see source |