[PATCH 1/2] maxmag: Implement

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
---
I tried running CTS on carrizo. fmax currently fails on nan operands,
and denormal fp32 values.
maxmag follows suite, after fixing fmax nan handling both pass fp64
and fail
on fp32 denormals.

I've noticed this behavior for fmax/fmin as well.

Both of the minmag/maxmag patches look good to me.

--Aaron