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Date: Thu, 10 Mar 2011 11:07:13 +0000
From: Alexander Best <arundel@freebsd.org>
To: George Liaskos <geo.liaskos@gmail.com>
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Cc: Martin Matuska <mm@freebsd.org>, current@freebsd.org
Subject: Re: [TESTING] ssse3 backport from gcc 4.3
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On Wed Mar  9 11, George Liaskos wrote:
> > I have prepared a patch that finishes the "core2" support part and
> > backports from gcc-4.3
> > the SSSE3 instruction set (-mssse3, -mno-ssse3).
> > It is enabled for -march=core2 by default.
> >
> > Testing and comments are welcome.
> >
> > Patch:
> > http://people.freebsd.org/~mm/patches/head-gcc-ssse3.patch
> >
> > The backport covers three GPLv2 revisions from gcc 4.3:
> > http://gcc.gnu.org/viewcvs?view=revision&revision=117958 (applies cleanly)
> > http://gcc.gnu.org/viewcvs?view=revision&revision=121687 (small adjustment)
> > http://gcc.gnu.org/viewcvs?view=revision&revision=121726 (small adjustment)
> > http://gcc.gnu.org/viewcvs?view=revision&revision=123639 (small adjustment)
> 
> Just finished compiling world and kernel with the patch, no issues
> whatsoever but i have some questions :)
> 
> I have a Q6600, with -march=native gcc still uses nocona instead of
> core2, clang does the right thing. Is this a bug?
> Is it possible to support sse4.1 for penryn or is there a problem with
> the license?

same issue here:

otaku% /usr/bin/gcc -### -march=native blabla.c
Using built-in specs.
Target: amd64-undermydesk-freebsd
Configured with: FreeBSD/amd64 system compiler
Thread model: posix
gcc version 4.2.1 20070719  [FreeBSD]
 "/usr/libexec/cc1" "-quiet" "-D_LONGLONG" "null.c" "-march=nocona" "-mtune=generic" "-quiet" "-dumpbase" "null.c" "-auxbase" "null" "-o" "/var/tmp//cca3OQb6.s"
 "/usr/bin/as" "-Qy" "-o" "/var/tmp//ccmuWSiZ.o" "/var/tmp//cca3OQb6.s"
 "/usr/bin/ld" "--eh-frame-hdr" "-dynamic-linker" "/libexec/ld-elf.so.1" "/usr/lib/crt1.o" "/usr/lib/crti.o" "/usr/lib/crtbegin.o" "-L/usr/lib" "-L/usr/lib" "/var/tmp//ccmuWSiZ.o" "-lgcc" "--as-needed" "-lgcc_s" "--no-as-needed" "-lc" "-lgcc" "--as-needed" "-lgcc_s" "--no-as-needed" "/usr/lib/crtend.o" "/usr/lib/crtn.o"

it seems "native" isn't "core2" aware. could this be backported to our gcc or
does that code fall under the gplv3?

cheers.
alex

> 
> Regards

-- 
a13x