http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47298
--- Comment #2 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch>
2011-01-14 20:52:54 UTC ---
(In reply to comment #1)
> It's faster for me with -O3 (Athlon64, using -march=native).
well not on
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
stepping : 5
I have 8Gflops with -O2 and somewhat more than 4 with -O3
BTW, the proper test program is
> cat test_compare.f90
REAL(KIND=8), DIMENSION(12,12) :: A,B,C
A=0 ; B=0 ; C=0
DO I=1,10000000
CALL HARD_NN_12_12_12(C,A,B)
ENDDO
END
