# Hyperscan Change Log

This is a list of notable changes to Hyperscan, in reverse chronological order.

## [5.4.10] 2023-09-23


## [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
