v52.2.0

v52.2.0 Public Minor Release

Feat

• Enable non-transposed BF16 reorders.

Fix

• Reorder test failures on multi-isa builds.
• Over-eager read ahead of operands in a64_hgemm_8x24.

Documentation (API, build guide, contribution guide, errata, etc.) available here:
https://artificial-intelligence.sites.arm.com/computelibrary/v52.2.0/index.xhtml

v52.1.0

v52.1.0 Public Minor Release

Feat

• Restrict GEMM stateless execution to fixed-format kernels only
• Add wrapper class to expose cpu::CpuPool2d functionality
• Enable non-transposed F32 reorders

Documentation (API, build guide, contribution guide, errata, etc.) available here:
https://artificial-intelligence.sites.arm.com/computelibrary/v52.1.0/index.xhtml

v52.0.1

v52.0.1 Public Patch Release

Fix

• Fill the padding area with zeros in CpuIm2ColKernel
• Public header files pass -Wundef check
• Limit thread split to the window size for run_parallel_pretranspose_B_array

Documentation (API, build guide, contribution guide, errata, etc.) available here:
https://artificial-intelligence.sites.arm.com/computelibrary/v52.0.1/index.xhtml

v52.0.0

v52.0.0 Public Major Release

Fix

• Make NEReorderLayer backwards compatible
• String conversion for Datatype::BFLOAT16
• Add missing header to winograd transforms for better leftover handling
• Update 3x3 winograd coefficients to increase numerical stability
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v52.0.0/index.xhtml

v25.04

v25.04 Public Major Release

Feat

• Add Neon(TM) and SVE hybrid FP16 matmul kernels using FP32 accumulation.

Fix

• Fix BF16 CpuGemmAssembly tests.
• SME softmax FP32 kernel failing given large inputs.
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.04/index.xhtml

v25.03.1

v25.03.1 Public Major Release

Feat

• Add experimental QNX(R) support.
• Add matmul fp16->fp32 kernels to enable fp16 PyTorch attention through ACL.

Fix

• Replace .word with .inst when encoding instructions.
• Neon(TM) detection for Bare Metal.

Refactor

• Refactor reorder kernel and layer.
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.03.1/index.xhtml

v25.03

v25.03 Public Major Release

Feat

• Notice: Migration to Semantic Versioning will take place by the end of April
• Modernize ACL CMake build
• Add a wrapper class for CpuPRelu operators

Fix

• Validation in Cpu Deconv for negative padded cases
• Reserved register list in [U]Int8 SME2 Softmax kernels
• Register allocation in [U]Int8 SME2 Softmax kernels
• C and C++ build flags assigned to proper SCons flags
• Don't pass filenames to the check-bad-style pre-commit hook
• Apply -fPIC flag both to C and C++ code
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.03/index.xhtml

v25.02.1

v25.02.1 Public Major Release

Feat

• Add stateless support for GEMM kernels that need working_space
• Add extra_cc_flags flag to SCons

Fix

• Enable wrapper tests
• Refactor format_code.py and pre-commit config
• Adjust tolerance in CPP/DFT/DFT1D/Complex test

Refactor

• Remove dynamic fusion and compute kernel writer files and mentions
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.02.1/index.xhtml

v25.02

v25.02 Public Major Release

Feat

• Detect number of CPU cores in OpenBSD
• Support tensors with dynamic shapes in NEGEMM
• Support FP16 dequantization in NEGEMMLowpMatrixMultiplyCore
• Add a public API for CpuMeanStdDevNormalization
• Enable BF16 inputs in CpuFullyConnected

Fix

• Linking errors in C++17 while compiling with clang
• False positive compiler warning stringop-overflow
• Redundant declaration warning of constexpr static data member (in C++17)
• Make GemmLowp return an error in validate when F16 is not supported
• Reorder interleave_by in CpuGemmAssemblyDispatch test code
• Gemm_hybrid_quantized.hpp was passing incorrect K size to the kernel
• Wrong kernel choice in CpuMul when build does not have SME2
• Incorrect scheduling hint heuristic for GEMMs
• Incorrect trademark usage in Readme for Arm(R)-Neoverse(TM) core

Refactor

• Use operator API inside NEMeanstdDevNormalizationLayer
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.02/index.xhtml

v25.01

v25.01 Public Major Release

Feat

• Add KleidiAI as third_party module
• Add NHWC FP16 kernels in CpuDirectConv
• Add support of all non-quantized data types for NEScatter
• Implement NEScatter for FP32 for all size configurations for Add/Sub/Min/Max/Update
• Add option to print time used by each iteration in the validation suite
• Support multi ISA build for macOS

Fix

• Performance regression in NEDeconvolutionLayer
• Performance regression in NEConvolutionLayer
• Usages of dynamic shapes in the library
• Use separate build flags for C and C++ for CMake
• Compiler error with gcc14 in 3rd party header stb_image
• Werror=noexcept compilation issue in NEScatter
• Unused tolerance_f16 in non-F16 builds
• SegFault in SME Softmax Int8 tests
• Disable pre-commit copyright validation for outside contributions
• SME2 interleaved s8 x s8 = f32 kernel mismatches
• Invalidate Bf16 Softmax when FEAT_SVE is not present and fix the tests
• Illegal instruction caused by SVE instruction outside streaming mode
• SME Winograd output transform 4x4_3x3 kernel
• Misspell in SConstruct:301: 'estate' to 'arch'

Refactor

• Removed deprecated NCHW kernels from CpuDirectConv2d
• Check pre-commit copyright, Android.bp and formatting separately

Perf

• Choose latest Gpu if Gpu name is not recognized and alter GEMM heuristics
  Documentation (API, build guide, contribution guide, errata, etc.) available here:
  https://artificial-intelligence.sites.arm.com/computelibrary/v25.01/index.xhtml