On 12-Nov-13 10:10, Dave Gamble wrote:
So let me go out on a limb here: if you take some single precision code and up it to double, and things get WORSE then there is something very strange about your original code that merits investigation.
It's very easy. As I mentioned in my other email, switching from float to double halves the number of available SIMD channels, which means you need to run your code twice as many times. On the other hand, in my experience, most of the DSP algorithms are quite tolerant to using 32-bit floats (DF filters being one exception).
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