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Accelerate library

Is there anything in the Accelerate library which can take two buffers of floats, scale one buffer by a constant value and then add it into the other buffer?
It seems like I could pervert vImage into doing this sort of thing by treating the buffers as "planar floats" and just specifying a very wide, 1-pixel tall image, but if it's optimized for gigantic buffers, it might not be optimal--I use less than 1K per pass. (I just do a lot of passes.) Is there a less roundabout way?

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