[Bug math/19869] floor and fmod not consistent with each other

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19869

--- Comment #8 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Andreas Schwab from comment #7)
> remainder(8, 1.6) returns -4.4e-16, thus, per definitionem, fmod(8, 1.6)
> returns remainder(8, 1.6) + 1.6 = 1.5999999999999996447.

POSIX does not define fmod in terms of remainder.  Is there another standard
which does?  (remainder seems to uniquely determine its result, though.)

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