libsimdpp
sse-popcount
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| libsimdpp | sse-popcount | |
|---|---|---|
| 1 | 2 | |
| 1,189 | 311 | |
| - | - | |
| 0.0 | 5.6 | |
| 4 months ago | 29 days ago | |
| C++ | C++ | |
| Boost Software License 1.0 | BSD 2-clause "Simplified" License |
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libsimdpp
sse-popcount
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Fast bitset decoding using Intel AVX-512
https://developer.arm.com/documentation/ddi0596/2020-12/SIMD...
I believe it does 128 bits per instruction, but I'm still struggling with rust w/ asm.
Along my journeys, however, I found this repo https://github.com/WojciechMula/sse-popcount/ which has tons of competing simd implementations for both intel and arm.
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Counting set bits in an interesting way
The builtin POPCNT that came with Intel's SSE4 (SSE4a for AMD) is much faster. However, at a certain point, using AVX2 (and AVX-512 if present) is actually faster yet [1] - at least for 512 byte inputs or larger.
[1]: https://github.com/WojciechMula/sse-popcount
What are some alternatives?
xsimd - C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE))
toys - Storage for my snippets, toy programs, etc.
simde - Implementations of SIMD instruction sets for systems which don't natively support them.
highway - Performance-portable, length-agnostic SIMD with runtime dispatch
VectorizedKernel - Running GPGPU-like kernels on CPU with auto-vectorization for SSE/AVX/AVX512 SIMD Architectures
Vc - SIMD Vector Classes for C++
simdjson - Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
std-simd - std::experimental::simd for GCC [ISO/IEC TS 19570:2018]
oneDNN - oneAPI Deep Neural Network Library (oneDNN)
pure_simd - A simple, extensible, portable, efficient and header-only SIMD library!
Simd - C++ image processing and machine learning library with using of SIMD: SSE, AVX, AVX-512, AMX for x86/x64, VMX(Altivec) and VSX(Power7) for PowerPC, NEON for ARM.