2011/11/16 Ian Ozsvald <i...@ianozsvald.com>: > From memory the 'native' flag made a difference (I think it allows use > of SSE?).
It depends on the machine, of course, but yes, on most machines it enables SSE. Just compare the output of $ < /dev/null g++ -E -v - |& grep cc1 and $ < /dev/null g++ -march=native -E -v - |& grep cc1 The following flags are added for me : -march=core2 -mcx16 -msahf --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=4096 -mtune=core2 -mcx16 and -msahf enable some additional instructions (see http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html) -mtune=core2 enables Intel's 64-bit extensions, MMX, SSE, SSE2, SSE3 and SSSE3 Best regards, -- Jérémie _______________________________________________ pypy-dev mailing list pypy-dev@python.org http://mail.python.org/mailman/listinfo/pypy-dev
