https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93588
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |x86_64-linux-gnu Status|UNCONFIRMED |WAITING Last reconfirmed| |2020-02-05 Ever confirmed|0 |1 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- >The intrinsics are supposed to map to the corresponding assembly instructions, >no? NO, it is an interface to what the assembly instructions do; not always 1-1 mapping. Have you benchmarked both versions? Also what happens if you use -march=native on your machines? Do the benchmark for that version is the best?