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xsimd

C++ wrappers for SIMD intrinsics.

Introduction

SIMD (Single Instruction, Multiple Data) is a feature of microprocessors that has been available for many years. SIMD instructions perform a single operation on a batch of values at once, and thus provide a way to significantly accelerate code execution. However, these instructions differ between microprocessor vendors and compilers.

xsimd provides a unified means for using these features for library authors. Namely, it enables manipulation of batches of numbers with the same arithmetic operators as for single values. It also provides accelerated implementation of common mathematical functions operating on batches.

You can find out more about this implementation of C++ wrappers for SIMD intrinsics at the The C++ Scientist. The mathematical functions are a lightweight implementation of the algorithms also used in boost.SIMD.

xsimd requires a C++14 compliant compiler. The following C++ compilers are supported:

Compiler Version
Microsoft Visual Studio MSVC 2015 update 2 and above
g++ 4.9 and above
clang 3.7 and above

The following SIMD instruction set extensions are supported:

Architecture Instruction set extensions
x86 SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, FMA3, AVX2
x86 AVX512 (gcc7 and higher)
x86 AMD same as above + SSE4A, FMA4, XOP
ARM ARMv7, ARMv8

Licensing

We use a shared copyright model that enables all contributors to maintain the copyright on their contributions.

This software is licensed under the BSD-3-Clause license. See the LICENSE file for details.

.. toctree::
   :caption: INSTALLATION
   :maxdepth: 2

   installation

.. toctree::
   :caption: USAGE
   :maxdepth: 2

   basic_usage
   vectorized_code

.. toctree::
   :caption: API REFERENCE
   :maxdepth: 2

   api/instr_macros
   api/batch_index
   api/data_transfer
   api/math_index
   api/aligned_allocator