Hi - I am a regular contributor to questions about SSE, AVX, AltiVec, Neon, etc on StackOverflow, and part of the house-keeping I do is making sure that all such questions have a <code>simd</code> tag. It's worth browsing this tag for some great questions and answers on SIMD programming at all levels, from beginner to advanced. Many of the answers contain useful working optimised SIMD code, which can be hard to find elsewhere on the web.