Dave Korn wrote: > Absolutely, there's a rounding error of some sort. Compare the difference > when compiling the testcase with -mno-cygwin (i.e. using mingw maths lib):
Isn't this just a case of the Cygwin math library choosing "round to even" and the MSVCRT/mingw library choosing "0.5 always rounds up"? The Goldberg paper covers this, and in fact it claims the IEEE standard requires round to even for all results of addition, subtraction, multiplication, and division. Sooo, doesn't look like a bug at all to me. Brian -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
