Using SVML intrinsics in Clang/MSVC

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I own Intel Parallel Studio 2016, but I find the compiler way too slow, unreliable and actually providing worse code than Clang, but the SVML is a great thing, so I'm trying to use it via Agner Fog's VectorClass (https://www.agner.org/optimize/). Things like sine and cosine seems working, but pow __svml_powf4 doesn't. It basically produces a pile of nonsense. __svml_powf8 is the same...

Any luck using these? Could there be a problem with calling convention? (considering it has 2 arguments, while sin/cos have just one)

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