Tests fail when compiling with "/fp:fast" with MSVC.

[fxb]

Checks when running "test-conversions", "test-ieee" and "test-strtod" fail, which is pretty much expected, since the fast floating-point behavior is deliberately imprecise.

See documentation here: https://msdn.microsoft.com/en-us/library/e7s85ffb.aspx

Should the library force "/fp:precise" behavior using the following pragma? Or shall it be up to the user to choose the correct floating-point behavior? In that case it would be good to add this to the documentation.

#pragma float_control(precise, on, push)
...
#pragma float_control(pop)

[fxb]

It seems like there are some tests in "test-strtod" that fail even with "/fp:precise". I see that some checks are already disabled for MSVC... maybe a few more need to be disabled as well. I'm using Visual Studio 2013 / 12.0.31101.00 Update 4

[floitschG]

I currently don't have a Windows machine handy. Could you send me the tests that fail?

The tests that currently fail are errors during compile-time of the MSVC. That is, it reads some numbers the wrong way. So far there isn't any test that fails because it produces incorrect code.
thanks.