http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
--- Comment #7 from Marc Glisse ---
(In reply to N Schaeffer from comment #6)
> Is there somewhere a rationale for not making isnan() find NaN's with
> -ffinite-math-only ?
finite-math-only is basically a promise that isinf and isnan always retur
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
--- Comment #6 from N Schaeffer ---
-fno-builtin-isnan is also interesting, thanks.
Is there somewhere a rationale for not making isnan() find NaN's with
-ffinite-math-only ?
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
Richard Biener changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
--- Comment #4 from N Schaeffer ---
int my_isnan(double x){
volatile double y=x;
return y!=y;
}
is translated to:
0x00406cf0 <+0>: movsd QWORD PTR [rsp-0x8],xmm0
0x00406cf6 <+6>: xoreax,eax
0x0040
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
--- Comment #3 from Marc Glisse ---
(In reply to N Schaeffer from comment #2)
> Do you have a suggestion concerning my last question:
> How can I check if x is NaN in a portable way (not presuming any compilation
> option) ?
This should bypass so
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
--- Comment #2 from N Schaeffer ---
Thank you for your answer.
My program (which is a computational fluid dynamics solver) is not supposed to
produce NaNs. However, when it does (which means something went wrong), I would
like to abort the progra
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60237
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #1 f
