https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77689
--- Comment #8 from morandidodo at gmail dot com --- (In reply to Uroš Bizjak from comment #7) > (In reply to morandidodo from comment #6) > > > However, I just made some tests, and it seems that the performance lost is > > particularly related to std::log. If something else is being used, like > > std::sqrt for example, the code compiled with gcc is still slower, but less. > > Adding -mveclibabi=svml should vectorize calls to these functions, but you'd > have to link with SVML vector library then. > > icc is doing this by default: > > 400e0f: e8 ac 16 00 00 callq 4024c0 <__svml_log4> > > but gcc doesn't: > > 40078b: e8 00 ff ff ff callq 400690 <log@plt> Actually, I tried it, but it does not seem to work. Indeed, using -mveclibabi=svml -lsvml -I(path-to-intel-lib-dir) does not seem to change the call address. If you have got any advice, it is appreciated ;)