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