"Joseph S. Myers" <[EMAIL PROTECTED]> writes: > On Thu, 14 Apr 2005, Richard Henderson wrote: > > > On Thu, Apr 14, 2005 at 10:47:26AM -0700, Steve Kargl wrote: > > > Does gcc support > > > #pragma STDC FENV_ACCESS > > > > No, but we currently act like access is "on". > > I thought we acted like it is "off", allowing CSE and constant folding > which might be affected by changes in rounding mode. Certainly some of > Stephen Moshier's testcases (attached to bug 20785) fail.
The flag that controls this is -ftrapping-math, and it defaults to "on". That said, though, there *are* bugs. For instance, we currently take code like: (void) 0. / 1.; and delete it as dead, even though it has side-effects.
