I am using 3D maths in my application extensively. How much speed-up can I achieve by converting my vector/matrix library to SSE, AltiVec or a similar SIMD code?
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I am using 3D maths in my application extensively. How much speed-up can I achieve by converting my vector/matrix library to SSE, AltiVec or a similar SIMD code?
In my experience I typically see about a 3x improvement in taking an algorithm from x87 to SSE, and a better than 5x improvement in going to VMX/Altivec (because of complicated issues having to do with pipeline depth, scheduling, etc). But I usually only do this in cases where I have hundreds or thousands of numbers to operate on, not for those where I’m doing one vector at a time ad hoc.