(__convert_inf_to_maxnum): New.static inline. (reducl): Use it to protect against Inf - Inf. (__fast_ldexpl): New function. Use in lieu of ldexpl.
(__convert_inf_to_maxnum): New.static inline. (reducl): Use it to protect against Inf - Inf. (__fast_ldexpl): New function. Use in lieu of ldexpl.