https://github.com/reyoung/avx_mathfun

AVX-optimized sin(), cos(), exp() and log() functions
https://github.com/reyoung/avx_mathfun

Last synced: about 2 months ago
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AVX-optimized sin(), cos(), exp() and log() functions

• Host: GitHub
• URL: https://github.com/reyoung/avx_mathfun
• Owner: reyoung
• Created: 2016-04-13T12:29:36.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2022-01-15T14:22:11.000Z (about 3 years ago)
• Last Synced: 2023-03-11T22:07:06.867Z (almost 2 years ago)
• Language: C
• Homepage:
• Size: 7.81 KB
• Stars: 89
• Watchers: 7
• Forks: 22
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
## AVX-optimized sin(), cos(), exp() and log() functions

### Introduction

Origin from [here](http://software-lisc.fbk.eu/avx_mathfun/). But fix several problem for it.

* The origin file is not compatible with GCC 4.9+.

    * because header immintrin.h is changed between [gcc 4.8](https://github.com/gcc-mirror/gcc/blob/gcc-4_8_5-release/gcc/config/i386/immintrin.h)

    and [gcc 4.9](https://github.com/gcc-mirror/gcc/blob/gcc-4_9_0-release/gcc/config/i386/immintrin.h)

    * In gcc 4.9, AVX2 function will always be defined whenever -mavx2 is set or not. So there are multi-define problems

    when use gcc 4.9 before.

    * In macos, the clang also use the header like gcc 4.9

    * I just add "avx_" prefix for each function in AVX2 to solve this problem.

* There is a warning in int constant variable define.

    * Just add a cast to fix it.

* AVX2 use intrinsics like '_mm256_and_si256', '_mm256_andnot_si256'

    * Change origin header to fix it. Make it work well in both avx and avx2.

### Test and Compile

Test programs use cmake. Just do

    # Install gtest before, and make sure your computer support avx2/avx.

    mkdir build

    cmake -D CMAKE_BUILD_TYPE=Release ..

    make -j 2

    ./test_avx2 ; ./test_avx

It will run some unittest.

### How to use this library

Just include "avx_mathfun.h" in your project.

### License

The origin [file](http://software-lisc.fbk.eu/avx_mathfun/) uses zlib license. It is not changed.