[Issue 15365] std.math: 80-bit exp() tests are utterly wrong when returning subnormals

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15365

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject.org> ---
(In reply to Don from comment #1)
> Note that these errors occur only in the slow path of the asm exp(). Thus, a
> more accurate, slower calculation can be added with no impact on speed.
> 
> Clearly, there is a loss of precision bug. I am not certain, but the problem
> may be in the extraction of the integer part, which is obviously limited to
> 64 bits.
> I need to look into this.
> 
> This title of this bug report is a bit alarmist though, it's not very
> generous to describe 52 bit accurate as "utterly wrong". :)

What about 5 bit accuracy? :-P

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