GCC 4.0, which was released a couple weeks ago, includes support for autovectorization, i.e. utilizing Altivec in C without needing to explicitly code for it. Some quick real-life tests indicates it’s still quite limited, but we hope more and more code will be autovectorizable in the future. The ample documentation includes sample code and status; we can only assume Gentoo will adopt the relevent compiler switches any day now.

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