https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
Andrew Pinski changed:
What|Removed |Added
Resolution|--- |INVALID
Status|UNCONFIRMED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
--- Comment #6 from Richard Guenther rguenth at gcc dot gnu.org 2011-05-25
09:26:56 UTC ---
Try -ffast-math (the default for ICC) which disables subnormals.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
--- Comment #7 from John Peyton jchthys at yahoo dot com 2011-05-25 14:40:56
UTC ---
Try -ffast-math (the default for ICC) which disables subnormals.
Thanks, this helped it run much faster!
I noticed it still takes longer to divide by 3.0 than
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
John Peyton jchthys at yahoo dot com changed:
What|Removed |Added
Severity|normal |minor
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
--- Comment #5 from John Peyton jchthys at yahoo dot com 2011-05-24 21:26:49
UTC ---
Maybe you are getting subnormals which causes a huge performance decrease.
It looks like that might indeed be the case. It didn't seem to happen with ICC
