------- Comment #9 from jakub at gcc dot gnu dot org 2010-03-22 10:47 ------- >From the numbers Vladimir posted for SPEC2k, x86_64 -mtune=generic vs. -mtune=core2 has the same rate for SPECint, with core2 slightly smaller code size, for SPECfp -mtune=core2 has 0.4% worse rate due to 10% drop on facerec (otherwise it would be 0.4% win) with slightly smaller code for -mtune=core2. On x86 SPECint is slightly worse with -mtune=core2 and even code size is slightly larger, SPECfp on the other side has both slightly better rate and code size with -mtune=core2. So using generic tuning for core2 is possible.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37367