The function powf is implemented in the RTS source file e_powf.c.  This if statement from line 228 ...

	    if(p_l+ovt>z-p_h)

and this if statement from line 240 ...

	    if(p_l<=z-p_h)

... are always true.

Consider removing these if statements. That would make it easier for customers who analyze the code behavior to make sure all if statements execute both ways.