CMSIS-DSP: Improved doxygen comments.
- The states of the vectorized filters are different from their scalar
versions (which may break some algorithms which are working on the
state of a filter like Goertzel)
+ - For performance reasons, some vectorized algorithms may read one vector
+ after the end of buffer (but the data read is not used).
+ If the buffer is close to the end of a memory zone, it is advised
+ to leave some free memory area between the end of the buffer and the end
+ of the memory zone.
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