vectorscan/CHANGELOG-vectorscan.md

Vectorscan Change Log

This is a list of notable changes to Vectorscan, in reverse chronological order. For Hyperscan Changelog, check CHANGELOG.md

[5.4.12] 2025-07-21

Multiple changes since last release, this will be the last 100% ABI and API compatible with Hyperscan release. Next versions will include major refactors and API extensions, it will be mostly backwards compatible however. Without particular order, platform support is now:

• Linux (x86, Arm, Power)
• FreeBSD 14 (x86, Arm, Power)
• MacOS 14+ (x86, Arm)

In total more than 200 configurations in the CI are tested for every PR.

Other features:

• Fat Runtime supported for Arm as well (ASIMD/SVE/SVE2).
• Initial implementations for Arm SVE/SVE2 algorithms added, thanks to Yoan Picchi from Arm.
• SIMDe support added, used as an alternative backend for existing platforms, but mostly interesting for allowing Vectorscan to build in new platforms without a supported SIMD engine.
• Various speedups and optimizations.
• Cppcheck and clang-tidy fixes throughout the code, both have been added to CI for multiple configurations, but only cppcheck triggers a build failure for now.

Various bugfixes, most important listed:

• Speed up truffle with 256b TBL instructions (#290)
• Fix Clang Tidy warnings (#295)
• Clang 17+ is more restrictive on rebind on MacOS/Boost, remove warning (#332)
• partial_load_u64 will fail if buf == NULL/c_len == 0 (#331)
• Bugfix/fix avx512vbmi regressions (#335)
• fix missing hs_version.h header (closes #198)
• hs_valid_platform: Fix check for SSE4.2 (#310)
• Fixed out of bounds read in AVX512VBMI version of fdr_exec_fat_teddy … (#333)
• Fix noodle SVE2 off by one bug (#313)
• Make vectorscan accept \0 starting pattern (#312)
• Fix 5.4.11's config step regression (#327)
• Fix double shufti's vector end false positive (#325)

[5.4.11] 2023-11-19

• Refactor CMake build system to be much more modular.
• version in hs.h fell out of sync again #175
• Fix compile failures with recent compilers, namely clang-15 and gcc-13
• Fix clang 15,16 compilation errors on all platforms, refactor CMake build system #181
• Fix signed/unsigned char issue on Arm with Ragel generated code.
• Correct set_source_files_properties usage #189
• Fix build failure on Ubuntu 20.04
• Support building on Ubuntu 20.04 #180
• Require pkg-config during Cmake
• make pkgconfig a requirement #188
• Fix segfault on Fat runtimes with SVE2 code
• Move VERM16 enums to the end of the list #191
• Update README.md, add CHANGELOG-vectorscan.md and Contributors-vectorscan.md files

[5.4.10] 2023-09-23

• Fix compilation with libcxx 16 by @rschu1ze in #144
• Fix use-of-uninitialized-value due to getData128() by @azat in #148
• Use std::vector instead of boost::container::small_vector under MSan by @azat in #149
• Feature/enable fat runtime arm by @markos in #165
• adding ifndef around HS_PUBLIC_API definition so that vectorscan can be statically linked into another shared library without exporting symbols by @jeffplaisance in #164
• Feature/backport hyperscan 2023 q3 by @markos in #169
• Prepare for 5.4.10 by @markos in #167

[5.4.9] 2023-03-23

• Major change: Enable SVE & SVE2 builds and make it a supported architecture! (thanks to @abondarev84)
• Fix various clang-related bugs
• Fix Aarch64 bug in Parser.rl because of char signedness. Make unsigned char the default in the Parser for all architectures.
• Fix Power bug, multiple tests were failing.
• C++20 related change, use prefixed assume_aligned to avoid conflict with C++20 std::assume_aligned.

[5.4.8] 2022-09-13

• CMake: Use non-deprecated method for finding python by @jth in #108
• Optimize vectorscan for aarch64 by using shrn instruction by @danlark1 in #113
• Fixed the PCRE download location by @pareenaverma in #116
• Bugfix/hyperscan backport 202208 by @markos in #118
• VSX optimizations by @markos in #119
• when compiling with mingw64, use __mingw_aligned_malloc() and __mingw_aligned_free() by @liquidaty in #121
• [NEON] simplify/optimize shift/align primitives by @markos in #123
• Merge develop to master by @markos in #124

[5.4.7] 2022-05-05

• Fix word boundary assertions under C++20 by @BigRedEye in #90
• Fix all ASAN issues in vectorscan by @danlark1 in #93
• change FAT_RUNTIME to a normal option so it can be set to off by @a16bitsysop in #94
• Optimized and correct version of movemask128 for ARM by @danlark1 in #102

[5.4.6] 2022-01-21

• Major refactoring of many engines to use internal SuperVector C++ templates library. Code size reduced to 1/3rd with no loss of performance in most cases.
• Microbenchmarking tool added for performance finetuning
• Arm Advanced SIMD/NEON fully ported. Initial work on SVE2 for a couple of engines.
• Power9 VSX ppc64le fully ported. Initial port needs some optimization.
• Clang compiler support added.
• Apple M1 support added.
• CI added, the following configurations are tested on every PR: gcc-debug, gcc-release, clang-debug, clang-release: Linux Intel: SSE4.2, AVX2, AVX512, FAT Linux Arm Linux Power9 clang-debug, clang-release: MacOS Apple M1