[PATCH v4] math: New generic fmaf implementation

[Wilco Dijkstra]

Hi Adhemerval,
 
> The current implementation relies on setting the rounding mode for
> different calculations (FE_TOWARDZERO) to obtain correctly rounded
> results.  For most CPUs, this adds significant performance overhead
> because it requires executing a typically slow instruction (to
> get/set the floating-point status), necessitates flushing the
> pipeline, and breaks some compiler assumptions/optimizations.


LGTM, thanks.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>

Cheers,
Wilco