Code with apache-2 on /usr/src

[Adhemerval Zanella]

On 28/05/2018 17:21, Steve Kargl wrote:
> On Mon, May 28, 2018 at 04:47:21PM -0300, Adhemerval Zanella wrote:
>>
>>
>> On 28/05/2018 16:35, Steve Kargl wrote:
>>>
>>> The above URL seems to contain only single precision code,
>>> e.g., sinf(x).  What benefit does this code have over the
>>> current implementations of these functions?  Doesn't ARM
>>> support at least a double precision type? 
>>
>> Yes, the github repository only contains single precision implementation and
>> at the moment my idea is to contribute with expf, powf, logf, expf2, and
>> log2f.  All these implementation are faster than current FreeBSD ones (I
>> plan to dig into with more details in patch proposal).  
>>
>>> Why have an
>>> algorithms for single precision that differ from the 
>>> algorithms at higher precision?
>>>
>>
>> Are you asking why use an implementation for single precision and another
>> for double and/or long double (if the case) or why to use a different
>> mathematical method for each one?
> 
> Your question don't make any sense to me.  My question means that
> if you only have ARM-specific single precision routines, then the
> underlying algorithms for those SP routines will by definition be
> different than the double and long double precision routines.  One
> can do for example 'diff -u s_sinf.c s_sin.c' while debugging. 
> The difference that one sees are usually restricted to different
> numerical literal constants and the number of terms in polynomial
> approximations. 
> 

Sorry if I was not clear, I did not fully get your question.  Also for avoid
further misconceptions, this new implementation is *not* ARM-specific, but
rather a different one which is faster than current for FreeBSD (in fact
faster on x86 as well).

And is having a different algorithm for single and double prevision 
a blocker for a future patch proposal?