https://bugzilla.kernel.org/show_bug.cgi?id=214815 --- Comment #3 from joseph@xxxxxxxxxxxxxxxx --- On Tue, 26 Oct 2021, Alejandro Colomar (man-pages) via Libc-alpha wrote: > Finally, the glibc manual doesn't mention this special case. See math.texi, "Errors in Math Functions". @item Each function with a floating-point result behaves as if it computes an infinite-precision result that is within a few ulp (in both real and complex parts, for functions with complex results) of the mathematically correct value of the function (interpreted together with ISO C or POSIX semantics for the function in question) at the exact value passed as the input. Exceptions are raised appropriately for this value and in accordance with IEEE 754 / ISO C / POSIX semantics, and it is then rounded according to the current rounding direction to the result that is returned to the user. @code{errno} may also be set (@pxref{Math Error Reporting}). (The ``inexact'' exception may be raised, or not raised, even if this is inconsistent with the infinite-precision value.) [...] @item If the mathematical result has magnitude well below half the least subnormal magnitude, the returned value is either zero or the least subnormal (in each case, with the correct sign), according to the current rounding direction and with the underflow exception raised. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
