Ian Lance Taylor написав(ла): > Oleg Kravchenko <oleg@xxxxxxxxxx> writes: > > >> Ian Lance Taylor написав(ла): >> >>> Oleg Kravchenko <oleg@xxxxxxxxxx> writes: >>> >>> >>> >>>> Why gcc say what mmx, sse, sse2 is disabled? >>>> >>>> $ gcc -march=nocona -mtune=nocona --help=target >>>> >>>> >>> They are disabled because you didn't explicitly request them. >>> >>> Ian >>> >>> >> It's mean my code will be compiled without optimization? >> > > Please send e-mail to the list, not just to me. Thanks. > > I assume you are asking whether the code will use SSE instructions if > appropriate. Yes, it will, because you specified -march with a > processor that supports SSE. The output of --help=target just tells you > the status of the various command line options; it doesn't tell you > which architecture will be used. > > Ian > Thank you very much! :)
