# DLTcollab/sse2neon

A translator from Intel SSE intrinsics to Arm/Aarch64 NEON implementation

Repository: https://github.com/DLTcollab/sse2neon
Canonical: https://ross.abutalabs.com/products/sse2neon
Language: C++
License: MIT
License Family: permissive
Topics: arm, aarch64, neon, sse, x86, simd, armv7l, armv8-a, intel-sse-intrinsics, arm64, neon-intrinsics, sse-intrinsics, sse2neon, armv8, intel-intrinsics, apple-silicon, high-performance-computing
Last push: 2026-08-21T02:27:00+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 98, release rhythm 31, longevity 100
- inputs: {"age_days": 3019, "days_push": 13, "days_rel": 244, "gap_med": 185.5, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1529, forks 235 (observed 2026-08-28T04:04:58.681759+00:00)

## What it is
A single-header C/C++ library that translates Intel SSE (MMX through SSE4.2 and AES) intrinsics to Arm/Aarch64 NEON intrinsics. It enables rapid porting of x86 SIMD code to Arm platforms by providing drop-in replacement headers with preserved semantics.

## Use cases
- port x86 SIMD code to Apple Silicon Macs
- compile SSE-based C++ libraries on ARM64 servers
- migrate Intel intrinsic code to Arm NEON without rewriting
- build x86-originating projects on aarch64 Linux
- run SSE-dependent code on Windows ARM64 via ARM64EC
- port MMX and SSE4.2 intrinsics to ARMv8

## When to choose
- you need to port existing x86 SIMD code to Arm quickly with minimal source changes
- you target Apple Silicon, ARM servers, or Windows on ARM
- you want a header-only drop-in replacement for Intel intrinsic headers

## When to avoid
- you are writing new Arm-native code and can use NEON intrinsics directly
- you need bit-exact IEEE-754 floating-point behavior without precision flags
- you target big-endian ARM or AVX/AVX-512 extensions

## Facets
- artifact type: library
- maturity: active
- function: compiler, developer-tools, graphics, math
- domain: developer-tools, cross-platform, performance, hardware
- platform: cpp, cross-platform, windows
- tags: simd, neon, sse, arm64, header-only, porting, apple-silicon, intrinsics, macos, linux

## Member repositories
- DLTcollab/sse2neon (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:58.681759+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:31:26.810228+00:00, confidence not recorded.
  - readme: https://github.com/DLTcollab/sse2neon (fetched 2026-08-28T04:04:58.681759+00:00, sha ed7a6689ec73)
- Data as of 2026-08-30T08:39:29.467469+00:00.