[Cfp-interest 3330] discrepancies between POSIX and IEEE-754 standards

[Nevstruev U-Yanus Poluektovich]

Hello,

The POSIX standard contains some (optional)requirements that contradict the
IEEE-754. Functions that behave approximately like an argument near 0 (sin,
tan, asin, atan, expm1, log1p, sinh, asinh, tanh, atanh, etc.) for
denormalized arguments should return the value of the argument as a result.
Is it possible that the POSIX standard only considers the rounding to
nearest mode?

How should such situations be addressed when developing a mathematical
library in accordance with IEEE-754?

Erik E.
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