C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
ldexp, _ldexpl
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The ldexp function calculates and returns the value of
     <x>*2^<exp>.
 
     The _ldexpl function uses the 80-bit long double form of arguments
     and return values. In all other respects, it is identical to
     ldexp.
 
     Return Value
 
     The return value is noted above. If an overflow results, ldexp
     returns ±HUGE_VAL and _ldexpl returns ±_LHUGE_VAL, depending on
     the sign of <x>. Both functions set errno to ERANGE.
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