multiprecision/float128_t:
there are still many features missing Specifically? eg exp2, log2, logb, modf, round, scalbn, copysign, signbit, isnormal are not available in std:: for float128_t, see cstdfloat_cmath.hpp. I'd
Am 01.02.19 um 22:08 schrieb John Maddock via Boost-users: like a full float128_t feature set, see https://en.cppreference.com/w/cpp/numeric/math and https://en.cppreference.com/w/cpp/numeric/special_math.
most values in numeric_limits
are not constexpr I know :(
There has been some work towards making the library constexpr throughout where possible: but I came to the conclusion that it wasn't possible without is_constant_evaluated() from C++20. numeric_limits<float128> might be possible though.
math::constants: i miss log2(2/e/pi/10) etc
Not sure I follow, do you really mean log2(2) ?? This is not constexpr for float128_t and the compiler generates a function call. :-(
Best, John.
Thank you very much Gero