https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64497
Bug ID: 64497
Summary: std::scalbln does not round correctly for long doubles
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: walter.mascarenhas at gmail dot com
The overload std::scalbln(long double, long) may not round the result correctly
when the exponent is very small. For instance, with round mode = near,
std::scalbln(1.1L, -16446)
returns 0, whereas std::scalbn(1.1L, -16446) and std::ldexp(1.1L, -16446)
return std::numeric_limits<long double>::denorm_min(), which I believe
is the correct result.
