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README.rst

SIMD-friendly algorithms for substring searching

Sample programs for article "SIMD-friendly algorithms for substring searching" (http://0x80.pl/articles/simd-strfind.html).

The root directory contains C++11 procedures implemented using intrinsics for SSE, SSE4, AVX2, AVX512F, AVX512BW and ARM Neon (both ARMv7 and ARMv8).

The subdirectory original contains 32-bit programs with inline assembly, written in 2008 for another article.

Usage

To run unit and validation tests type make test_ARCH, to run performance tests type make run_ARCH. Value ARCH selectes the CPU architecture:

  • sse4,
  • avx2,
  • avx512f,
  • avx512bw,
  • arm,
  • aarch64.

Performance results

The subdirectory results contains raw timings from various computers.

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SIMD (SWAR/SSE/SSE4/AVX2/AVX512F/ARM Neon) of Karp-Rabin algorithm's modification

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