# ARM_NEON_2_x86_SSE

**Repository Path**: mirrors_chromium_googlesource/ARM_NEON_2_x86_SSE

## Basic Information

- **Project Name**: ARM_NEON_2_x86_SSE
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-03-19
- **Last Updated**: 2025-08-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

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 The NEON_2_SSE.h file is intended to simplify ARM->IA32 porting.
 It makes the correspondence (or a real porting) of ARM NEON intrinsics as defined in "arm_neon.h" header
 and x86 SIMD (up to AVX2) intrinsic functions as defined in corresponding x86 compilers headers files.
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To take advantage of this file just include it in your project that uses ARM NEON intinsics instead of "arm_neon.h", compile it as usual and enjoy the result.

Considering 64-128 bit width of the NEON istructions AVX usage in x86 implementaion is litited, SSE is used in more than 90% of functions.
For significant performance improvement in some cases you might need to define USE_SSE4 or USE_AVX2 in your project settings. Otherwise by default SIMD up to SSSE3 to be used.

If NEON2SSE_DISABLE_PERFORMANCE_WARNING macro is defined, then the performance warnings for serial functions implementaions are disabled. 

For more information and license please read the NEON_2_SSE.h content.

The unit tests set used for ARM NEON - x86 SSE conformance verification is  https://github.com/christophe-lyon/arm-neon-tests