[PATCH] benchtests: Add sinf traces

[Wilco Dijkstra]

Hi Adhemerval,

>> The actual binary values matter very little unless they hit cornercases that are
>> significantly slower. The range is never an issue, nobody ever does sin (DBL_MAX)!
>
> Right, but I now really following your point here. Are you saying a possible binary64
> traced rounded to binary32 from specpu2017 would *not* be a good benchmark?

The opposite - what I'm saying the low bits of the mantissa don't actually matter at
all since we're just computing a polynomial. What matters is the quadrant it falls into
and special cases like which range reducer, early exits like close to zero or corner cases
for rounding.

Cheers,
Wilco