This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug target/50505] gcc-4.6.1 doesn't use "-mtune=k8-sse3" when using "-march=native"
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 24 Sep 2011 12:35:02 +0000
- Subject: [Bug target/50505] gcc-4.6.1 doesn't use "-mtune=k8-sse3" when using "-march=native"
- Auto-submitted: auto-generated
- References: <bug-50505-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50505
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-24 12:35:02 UTC ---
(In reply to comment #0)
> But, if that is true, gcc man page should be fixed to drop "k8-sse3" from
> -mtune options
No, because it's a valid option.
Since -march=k8 and -march-k8-sse3 do not do that same thing, it belongs in the
manual as a supported arch.
What the downstream reply says is that there's no difference between -mtune=k8
and -mtune=k8-sse3, so it doesn't matter that gcc uses -mtune=k8, you get the
same result.
If -mtune=k8 and -mtune=k8-sse3 do the same thing, why do you care which is
used?