On 2005-05-26 09:14:40 -0400, Daniel Berlin wrote: > On Thu, 26 May 2005, Vincent Lefevre wrote: > >On 2005-05-25 19:27:21 +0200, Allan Sandfeld Jensen wrote: > >>Yes. I still don't understand why gcc doesn't do -ffast-math by > >>default like all other compilers. > > > >No! And I really don't think that other compilers do that. > > Have you looked, or are you just guessing?
Just guessing (I said "I don't think"). > I know for a fact that XLC does it at -O3+, and unless i'm > misremembering, icc does it at -O2+. But do they use -O3 and -O2 by default? Even if they don't, maths optimization breaking IEEE-754 (if they claim to support it) is bad, IMHO, but well... I don't have these compilers to test them. If you have simple C code showing how they "break" it, I'd be interesting... -- Vincent Lefèvre <[EMAIL PROTECTED]> - Web: <http://www.vinc17.org/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/> Work: CR INRIA - computer arithmetic / SPACES project at LORIA
