------- Comment #2 from dominiq at lps dot ens dot fr 2007-03-18 10:20 ------- Andrew,
Thanks for the answer. Additional timings for AMD Opteron(tm) Processor 250, 2.4Ghz: Target: x86_64-unknown-linux-gnu ... gcc version 4.3.0 20061231 (experimental) [tocata] test/fortran> gfc -O3 sincos.f90 [tocata] test/fortran> time a.out -6.324121691031215E-002 -2.934957388823078E-003 19.847u 0.001s 0:20.41 97.2% 0+0k 0+0io 0pf+0w [tocata] test/fortran> gfc -O3 sincos_o.f90 [tocata] test/fortran> time a.out -6.324121619598655E-002 -2.934957388823078E-003 19.793u 0.000s 0:19.80 99.9% 0+0k 0+0io 0pf+0w [tocata] test/fortran> gfc -O3 cexp.f90 [tocata] test/fortran> time a.out -6.324121619598655E-002 -2.934957388823078E-003 15.613u 0.000s 0:15.63 99.8% 0+0k 0+0io 0pf+0w sin+cos is not optimized as cexpi. Target: i386-pc-linux-gnu ... gcc version 4.3.0 20070225 (experimental) [tocata] test/fortran> gfc32 -Wa,-32 -O3 -fdump-tree-optimized sincos.f90 [tocata] test/fortran> time a.out -6.324122144403047E-002 -2.934963088285132E-003 10.757u 0.000s 0:10.76 99.9% 0+0k 0+0io 0pf+0w [tocata] test/fortran> gfc32 -Wa,-32 -O3 -fdump-tree-optimized sincos_o.f90 tocata] test/fortran> time a.out -6.324122124732012E-002 -2.934963117388848E-003 7.291u 0.001s 0:07.47 97.5% 0+0k 0+0io 4pf+0w [tocata] test/fortran> gfc32 -Wa,-32 -O3 -fdump-tree-optimized cexp.f90 [tocata] test/fortran> time a.out -6.324122124732012E-002 -2.934963117388848E-003 11.412u 0.000s 0:11.41 100.0% 0+0k 0+0io 0pf+0w sin+cos is optimized as cexpi which is faster than cexp -> real optimization! The i386 code is almost twice as fast as the x86_64 one. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31249
