[Bug c/56651] sin() and tan() have different values during compile time and run time.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56651



Richard Biener <rguenth at gcc dot gnu.org> changed:



           What    |Removed                     |Added

----------------------------------------------------------------------------

             Status|WAITING                     |RESOLVED

         Resolution|                            |WONTFIX



--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-18 
11:29:12 UTC ---

This is not a bug in GCC.  GCC evaluates to 0.5ulp precision at compile-time

using MPFR (for a cross-compiler it would have no way to invoke the actual

targets math library routine for example).  Thus the "bug" is in your

math library which does not evaluate to the same precision.



OTOH this is not a bug at all, but a "feature".  We cannot fix it.