Re: power() function in Windows: "value out of range: underflow"

2018-04-11 0:13 GMT-03:00 David Rowley <david.rowley@2ndquadrant.com>:
> I can recreate this when building with MSVC 2012. I confirm that I see
> the same as you. Microsoft are setting errno to EDOM in the above 3
> cases, where in Linux the result is still NaN, just the errno is not
> set.
>
FWIW, I tested in MSVC 2017 (15.6.4) and it worked like expected.
Looking at [1], it seems there could be nasty bugs when using math
functions in MSVC < 2013 (or 2015). I don't have some older MSVC here
to try /fp:OPTIONHERE [2] to see if it makes any difference.


[1] https://docs.microsoft.com/en-us/cpp/porting/floating-point-migration-issues
[2] https://msdn.microsoft.com/pt-br/library/e7s85ffb.aspx


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