[PATCH v3 4/5] math: Optimize frexpl (intel96) with fast path for normal numbers

[Wilco Dijkstra]

Hi Osama,
 
> Add fast path optimization for frexpl (80-bit x87 extended precision) using
> a single unsigned comparison to identify normal floating-point numbers and
> return immediately via arithmetic on the exponent field.

Thanks - LGTM.

Cheers,
Wilco