SIMD intrinsics and the possibility of a standard library solution

• highway

  34 2,318 9.5 C++

  Performance-portable, length-agnostic SIMD with runtime dispatch

  

  It seems that way but there is actually a large common subset, see https://github.com/google/highway/blob/master/g3doc/instruction_matrix.pdf.

• eve

  5 573 9.5 C++

  Expressive Vector Engine - SIMD in C++ Goes Brrrr (by jfalcou)

  Anyways, if you feel like trying eve - pop an algo in question into issues: https://github.com/jfalcou/eve/issues

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• xsimd

  1 1,668 8.5 C++

  C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE))

  

  xsimd - 1.6K GH stars

• version2

  5 975 5.4 C++

  Vector class library, latest version

  

  Vector class library - 938 GH stars

• std-simd

  4 470 0.0 C++

  std::experimental::simd for GCC [ISO/IEC TS 19570:2018]

  

  std-simd - 451 GH stars

• Skia

  31 7,354 10.0 C++

  Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

  

  I use SkVx from Skia. It uses compilers' vector extensions and few platform-specific intrinsics. If no vector extension available (e.g. msvc), a scalar implementation is provided in the hope that compiler can vectorize it.

• simd_decimal

  1 8 10.0 Rust

  vectorized decimal parsing

  Compare this neon parser and this sse parser, or for a very direct example what happens if you naively do the x86 method of vector search on arm. The shuffle and accumulation for each parser is drastically different, since the set of horizontal multiply-accumulates are different.

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• ispc

  1 2,194 8.5 C++

  Intel® Implicit SPMD Program Compiler

  

  ISPC: https://github.com/ispc/ispc

• sleef

  7 497 0.0 C

  SIMD Library for Evaluating Elementary Functions, vectorized libm and DFT

  Highway and Agner's VectorClass also have math functions. And SLEEF should definitely be mentioned.

• simde

  3 1,731 4.2 C

  Implementations of SIMD instruction sets for systems which don't natively support them.

  

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