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I've use Visual Studio with the DirectX XNA math library. Now, I use the GNU compiler collection. Can anyone advise a SIMD math library with a good documentation?

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You can also do it "yourself" using the SSE (Streaming SIMD Extensions) instructions and the intrinsics ( *mmintrin.h files ) of your compiler/proc.

Tutorials

Here is an example of how to use SSE instructions with assembly:
http://neilkemp.us/src/sse_tutorial/sse_tutorial.html

And here is a tutorial on how to use SSE instructions with intrinsics:
http://www.codeproject.com/KB/recipes/sseintro.aspx

A practical guide to using SSE SIMD with C++:
http://sci.tuomastonteri.fi/programming/sse/printable

Useful informations

Intel C++ Intrinsics reference (useful to get the list of instructions):
http://cache-www.intel.com/cd/00/00/34/76/347603_347603.pdf

SSE & SSE2 Intrinsic support for the enhanced instruction sets supported by Intel and AMD processors (useful to all kinds of informations relative to SSE and SIMD):
http://msdn.microsoft.com/en-us/library/y0dh78ez%28v=vs.71%29.aspx

Overall instructions list and informations about SSE, SSE2, SSE3, SSSE3, SSE4, 3DNow etc (different versions of SSE for different proc architecture):
http://softpixel.com/~cwright/programming/simd/sse.php

If you prefer a linear algebra framework I eared about Eigen:
http://eigen.tuxfamily.org/
http://eigen.tuxfamily.org/index.php?title=FAQ#Vectorization (about SIMD support)

And finally if you need more answers about C++ SIMD Frameworks, here is a StackOverflow link. (C++ SSE SIMD framework) :
http://stackoverflow.com/questions/4953121/c-sse-simd-framework

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Thank you, but I have not time to do so much routine. – itun May 23 '11 at 1:17
Maybe next time, it's not that hard that it looks like ;). However I added few links at the bottom that might help. – Valkea May 23 '11 at 1:38
Neat answer. SIMD math is fun. I remember days when i was using SSE for accelerating raytracing. But why to play little toy, if we have GPGPU now :) – Notabene May 23 '11 at 9:21
up vote 3 down vote

Both of these vector/matrix-libs have optimized SSE2 code, Sony also has an Altivec for PowerPC compile switch:

  1. Sony's vectormath SSE2 and Altivec

  2. Bullet's Linearmath SSE2

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up vote 1 down vote

by a little seraching i think you can use bullet's math library, bullet itself is an opensource physics engine and it seems to have a powerfull math library beside it. here is a shortcut to download link http://sourceforge.net/projects/bullet/files/SIMD%20and%20amp_%20Vector%20Math%20library/simd%20math%201.02%20and%20vector%20math%201.01/simdvectormath.tgz/download

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I saw it, but how to compile it I did not understand – itun May 22 '11 at 23:38
3  
Rather than just dumping a download link, perhaps a link to the actual website with the documentation, wiki, and API reference might be more helpful. bulletphysics.org – Bob Somers May 22 '11 at 23:47
@Bob i just wanted to express that download link since it just takes some time find simdvectormath specific file in bullet files – Gajoo May 23 '11 at 7:08
up vote 1 down vote

It is not here yet. But there will be a boost.simd library (hopefully). Take look at this presentation (given last week at boostcon)

https://github.com/boostcon/2011_presentations/blob/master/thu/simd.pdf

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up vote 0 down vote

AMD has the open source SSEPlus project, although I have never used it so I can't comment on its quality or applicability.

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