Grigory Zagorodnev wrote: > Tim Prince wrote: >> Martin Alm wrote: >>> (T5600). As I understand -march=merom is comming in 4.3. But we are >>> not there yet, I'm going to use 4.1 and I want to know what flags are >>> recommended? >>> >> -march=nocona which 4.2 would select for you, is probably as good as >> you can do. >> > For 4.2 the better choice is -mtune=generic, which is actually default. > Same you can get with 4.1 compiler in RH FC5. > > For regular 4.1 you can try either -mtune=nocona or -mtune=ppro. We've been debating this recently and I'd like to see what others think. With 4.1, would it be better to use -m(arch|tune)=prescott or -march=pentium-m for Core Duo (Yonah) in a 32bit userland? Core Duo 2 (Merom)? Would -march=pentium-m -msse3 be a better choice? In a 64bit world, how does -march=nocona compare to something like -march=pentium-m -msse3 -m64 (which i think is a little sketchy)? Thanks, --de.
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