[Bug libc/4943] Inconsistent rounding behaviour for sprintf and IEEE doubles

[vincent+libc at vinc17 dot org]

------- Additional Comments From vincent+libc at vinc17 dot org  2007-09-20 01:02 -------
(In reply to comment #4)
> Thank you for making my point for me.  Your exact same code compiled
> with MinGW for Windows produces the following output:

This is a different C library under Windows, not the glibc.

> You still don't spot the inconsistency?

No inconsistencies. You get different results because the C standard doesn't
specify these cases and the C libraries are different. FYI, the Mac OS X libc
and the Solaris2.7 libc both give the same results as glibc. So, if there is a
library that would need to change in order to make the results the same
everywhere is MinGW, not the glibc.

> Rounding toward even numbers is mathematical nonsense.

You may think that, but this doesn't make a standard. IEEE-754 rules are already
well-established. So, it would be a bit difficult for you to make things change.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=4943

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