Introduction to AVX2 optimizations in x264

Re:Introduction to AVX2 optimizations in x264 by _ihaque on Tuesday April 23, 2013 @09:37PM (#5599136)

(I guess DarkShikari's comment is nested too deeply for me to reply directly.)

In my (admittedly limited) experience [1], the compiler has actually done pretty decently at optimizing register allocation in intrinsic-heavy loops. I wrote out the assembly loop in [2] with manual allocation into all 16 XMMs and then noticed the compiler managed to optimize 1 of them out.

[1] https://github.com/simtk/IRMSD

[2] https://github.com/SimTk/IRMSD/blob/master/python/IRMSD/theo...

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Re:Introduction to AVX2 optimizations in x264 by jamesaguilar on Tuesday April 23, 2013 @10:01PM (#5599215)

You can always reply directly by clicking on the link above a person's comment. Thanks for the interesting discussion on this one guys.

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Re:Introduction to AVX2 optimizations in x264 by _ihaque on Tuesday April 23, 2013 @10:32PM (#5599350)

Thanks for the pointer! That's what I get for lurking for too long.

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