Re: [Discuss-gnuradio] VOLK: fast way to log10()?

[Marcus D. Leech]

On 09/15/2015 11:15 PM, Dennis Glatting wrote:
> With the VOLK library, is there a way to compute the log10() of each
> 32f in a buffer?
>
> That is:
>
>   for( int i = 0; i < num; ++i )
>     buf[i] = std::log10( buf[i]);
>
> I only see log2() in the library but don't know if there is an easy way
> to compute log10().
>
>
> Thanks.
Define "fast".

Ordinarily, one does a log10 to convert into engineering units at the 
back of, for example, a power-measurement chain.

There's usually no reason to do that in the middle of a flow-graph, 
where things can stay in linear units.