v24.05 release

• Math routine changes
  • Fixed AdvSIMD vector powf and log for the big-endian target.
  • Fixed an undefined signed shift in the exp10 code, unlikely
    to cause problems in practice.
  • AdvSIMD pow got minor optimizations.
  • Now there is a build option to disable SIMD and exp10 tests
    to allow testing libcs without those symbols.
• pl/ directory
  • Several big-endian fixes and code cleanups.
  • This continues to host many math routines with mixed quality.

v24.01 release

• String routine changes
  • Added memcpy, memmove, memset for MOPS extension.
  • Optimized memcpy by improving code alignment.
  • Fixed GNU property note on ILP32.
• Math routine changes
  • Vector math code now uses ACLE intrinsics and aarch64 only.
  • Vector math code no longer builds scalar and base PCS variants.
  • Optimized vector sin and cos.
  • Added tgamma128, a binary128 tgammal implementation.
• pl/ directory
  • This continues to host many math routines with mixed quality.

v23.01 release

• Project changes
  • All files are under a new dual license now (MIT OR Apache-2.0 WITH LLVM-exception at the election of the user).
  • Added MAINTAINERS file describing who maintains the subdirectories.
  • Added README.contributors files documenting contribution requirements.
  • Added new pl/ subdirectory for Arm's Performance Library related routines.
• String routine changes
  • Added memset benchmark.
  • Improved strlen and memcpy benchmarks.
  • Added SVE memcpy.
  • Updated arm string functions to support M-profile PACBTI.
  • Merged the MTE and generic versions of strcmp, strncmp, strcpy and stpcpy into one implementation.
  • Optimized memcmp, memchr-mte, memrchr, strchr-mte, strchrnul-mte, strrchr-mte, strlen, strlen-mte, strnlen, strcpy.
• Math routine changes
  • Fixed constants in sinf, cosf and sincosf to be compile time computed even with gcc-12 -frounding-math.
  • Fixed an invalid shift in logf.
  • Support floating-point exceptions in vector math routines when WANT_SIMD_EXCEPT is set.

v21.02 release

• String routine changes
  • Added AArch64 ILP32 ABI support.
  • Fixed SVE strnlen return value.
  • Added MTE related __mtag_tag_region.
  • Added MTE related __mtag_tag_zero_region.
  • Minor code cleanups.

v20.11 release

• New math routines
  • Scalar erff and erf using fma.

v20.08 release

• Bug fixes
  • strcmp-mte nul check
  • strncmp-mte with large size
  • arm memcpy with large size (CVE-2020-6096)
• String routines performance improvements
  • strlen
  • memmove with backward copy
• Benchmarking code for strings and memory routines
  • strlen

v20.05 release

• New functionality (64-bit Arm)
  • string: Optimized MTE variants of strlen, strnlen, strchr, strchrnul, strrchr, memchr, memrchr, strcpy, stpcpy, strcmp, strncmp
  • string: Changes to support BTI
  • string: New optimized memrchr, strnlen
• Performance improvements (Neoverse N1)
  • strchr/strchrnul: 21% improvement on long strings
  • strrchr: 11% improvement
  • strnlen: 130% improvement on long strings, 50% on short strings
• Benchmark and tests
  • string: New memcpy benchmark
  • string: Cleanup testsuite and improve test coverage

v20.02 release

New functionality

• string: New strrchr and stpcpy routines
• string: New Memory Tagging Extension (MTE) variants of strlen and strchr
• math: New vector version of pow(double)
• networking: Optimized ones' complement checksum for 32-bit and 64-bit Arm

Performance improvements

• string: Improved memcpy and memmove (SIMD and non-SIMD) for 64-bit Arm
• string: Improved memset for 64-bit Arm