c++ SSE SIMD framework

c++ sse simd intrinsics
user283145 picture user283145 · Feb 10, 2011 · Viewed 14.5k times · Source

Does anyone know an open-source C++ x86 SIMD intrinsics library?

Intel supplies exactly what I need in their integrated performance primitives library, but I can't use that because of the copyrights all over the place.

EDIT

I already know the intrinsics provided by the compilers. What I need is a convenient interface to use them.

Answer

user12 picture user12 · May 11, 2013

Take a look at libsimdpp header-only C++ SIMD wrapper library.

The library supports several instruction sets via single interface: SSE2, SSE3, SSSE3, SSE4.1, AVX, AVX2, AVX512F, XOP, FMA3/4, NEON, NEONv2, Altivec. All of Clang, GCC, MSVC and ICC are suported.

Any differences between instruction sets are resolved by implementing the missing instructions as a combination of supported ones. As a bonus, it's possible to compile the same code for several instruction sets, link the resulting object files to a single executable and use a convenient dynamic dispatch mechanism to run the implementation most tailored to the current processor.

Related questions

Get member of __m128 by index?

I've got some code, originally given to me by someone working with MSVC, and I'm trying to get it to work on Clang. Here's the function that I'm having trouble with: float vectorGetByIndex( __m128 V, unsigned int i ) { assert( i &…

Read More
SIMD and difference between packed and scalar double precision

I am reading Intel's intrinsics guide while implementing SIMD support. I have a few confusions and my questions are as below. __m128 _mm_cmpeq_ps (__m128 a, __m128 b) documentation says it is used to compare packed single precision floating …

Read More
SSE intrinsic functions reference

Does anyone know of a reference listing the operation of the SSE intrinsic functions for gcc, i.e. the functions in the <*mmintrin.h> header files? Thanks.

Read More