Raymond Hettinger <raymond.hettin...@gmail.com> added the comment:

[Tim]
> Note that, on Windows, ldexp() in the presence of 
> denorms can truncate. Division rounds, so
>
>    assert x / 2**i == ldexp(x, -i)
>
> can fail.

Objects/longobject.c::long_true_divide() uses ldexp() internally.  Will it 
suffer the same issues with subnormals on Windows?  Is CPython int/int true 
division guaranteed to be correctly rounded?

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue45876>
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