https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64497
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Walter Mascarenhas from comment #2) > What if there is a difference in the expected behavior > for this function in C and C++11? There isn't any difference, so it doesn't matter. > Is it not up to g++ > for implementing what is mandated in C++11? (This > is not a rhetorical question, I really do not know the answer.) Yes. > On the other hand, > http://en.cppreference.com/w/cpp/numeric/math/scalbn states that > > "If a range error due to underflow occurs, the correct result (after > rounding) is returned." The C++ standard doesn't say that. > I looked at the standard (N3797.pdf) but did not find anything > specific about std::scalbln. It says it is the same as C, so cppreference.com is wrong.
