------- Comment #3 from pinskia at gcc dot gnu dot org 2006-12-13 18:56 ------- (In reply to comment #2) > than the original 1.9 seconds, but still far from the 0.3 seconds I get > manually unrolling the loop.
Try with -ffast-math, you should get the same speed. Again the problem is with signed zeros to be able to get down to what you have with the manually unrolled loop. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30201
