Date: Fri, 19 Mar 2010 13:16:04 -0400 From: John Baldwin <jhb@freebsd.org> To: Ivan Voras <ivoras@freebsd.org> Cc: svn-src-head@freebsd.org, Garrett Cooper <yanefbsd@gmail.com>, svn-src-all@freebsd.org, src-committers@freebsd.org, Xin LI <delphij@freebsd.org> Subject: Re: I486_CPU and I586_CPU removed from GENERIC kernel [was Re: svn commit: r205307 - head/sys/i386/conf] Message-ID: <201003191316.04620.jhb@freebsd.org> In-Reply-To: <9bbcef731003190913k4f3afbd8mb4e767c40433be8e@mail.gmail.com> References: <7d6fde3d1003182333m336d52fbh987035a21568250d@mail.gmail.com> <9bbcef731003190913k4f3afbd8mb4e767c40433be8e@mail.gmail.com>
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On Friday 19 March 2010 12:13:00 pm Ivan Voras wrote: > On 19 March 2010 07:33, Garrett Cooper <yanefbsd@gmail.com> wrote: > > On Thu, Mar 18, 2010 at 6:16 PM, Xin LI <delphij@freebsd.org> wrote: > >> Author: delphij > >> Date: Fri Mar 19 01:16:53 2010 > >> New Revision: 205307 > >> URL: http://svn.freebsd.org/changeset/base/205307 > >> > >> Log: > >> SSE is enabled by default about 5 years ago so there is no point pretending > >> that we support I486 and I586 CPUs in the GENERIC kernel, users wants these > >> support would have to build a custom kernel to explicitly disable SSE > >> anyways. > > SSE in the userland you mean? Regardless, I don't think there is now > reason for compiling everything as for i386. E.g. why not add at least > -mtune=generic or even also -march=i686 to default gcc options? > > http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html I actually suggested using -mtune=i686 several years ago for i386. Using -mtune=generic probably would be a good thing to use when CPUTYPE is not specified for i386 and amd64 now. -- John Baldwin
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