On Wed, 10 Jan 2018, Bernhard Reutner-Fischer wrote: > > >+ /* x <= +Inf is the same as x == x, i.e. !isnan(x), but this loses > > >+ an "invalid" exception. */ > > >+ (if (!flag_trapping_math) > > >+ (eq @0 @0)))) > > >+ /* x == +Inf and x >= +Inf are always equal to x > DBL_MAX, but > > >+ for == this introduces an exception for x a NaN. */ > > What does "x a NaN" mean? x OP NaN resp. x CMP NaN ?
That x is a NaN. fpclassify (x) == FP_NAN. It's not a C comparison operator since NaNs compare unequal to everything. > Shouldn't run tests return 0 here? Also drop the exit() declaration > since it's unused? C99 automatically returns 0 from the end of main, but it's true the default style would be exit (0) in tests. -- Joseph S. Myers jos...@codesourcery.com
