Re: [TESTING] ssse3 backport from gcc 4.3
On Thu Mar 10 11, Dimitry Andric wrote:
On 2011-03-09 22:18, David Schultz wrote:
The proliferation of -mno-sse -mno-sse2 -mno-sse3 options in the
makefiles is probably not needed: I'm pretty sure -mno-sse implies
the other two, unless -msse3 is specified explicitly.
Indeed, contrib/gcc/config/i386/i386.c has:
static bool
ix86_handle_option (size_t code, const char *arg ATTRIBUTE_UNUSED, int
value)
{
...
case OPT_msse:
if (!value)
{
target_flags = ~(MASK_SSE2 | MASK_SSE3);
target_flags_explicit |= MASK_SSE2 | MASK_SSE3;
}
return true;
E.g -mno-sse disables SSE2 and SSE3, unless you explicitly add -msse2 or
-msse3 options. In Martin's patch, this fragment uses MASK_SSSE3 too.
+1 for removing -mno-sse2, -mno-sse3 and -mno-ssse3 throughout the source
tree.
...also -mfpmath=387 is still present for amd64 and i don't think it's
necessary. with -mno-sse i don't think -mfpmath=sse remains the default for
amd64.
Clang has a similar mechanism, -mno-sse disables all 'higher' SSE
variants too.
--
a13x
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Re: [TESTING] ssse3 backport from gcc 4.3
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=revisionrevision=117958 (applies cleanly) http://gcc.gnu.org/viewcvs?view=revisionrevision=121687 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=121726 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=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 ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [TESTING] ssse3 backport from gcc 4.3
On Thu Mar 10 11, Alexander Best wrote:
On Thu Mar 10 11, Dimitry Andric wrote:
On 2011-03-09 22:18, David Schultz wrote:
The proliferation of -mno-sse -mno-sse2 -mno-sse3 options in the
makefiles is probably not needed: I'm pretty sure -mno-sse implies
the other two, unless -msse3 is specified explicitly.
Indeed, contrib/gcc/config/i386/i386.c has:
static bool
ix86_handle_option (size_t code, const char *arg ATTRIBUTE_UNUSED, int
value)
{
...
case OPT_msse:
if (!value)
{
target_flags = ~(MASK_SSE2 | MASK_SSE3);
target_flags_explicit |= MASK_SSE2 | MASK_SSE3;
}
return true;
E.g -mno-sse disables SSE2 and SSE3, unless you explicitly add -msse2 or
-msse3 options. In Martin's patch, this fragment uses MASK_SSSE3 too.
+1 for removing -mno-sse2, -mno-sse3 and -mno-ssse3 throughout the source
tree.
...also -mfpmath=387 is still present for amd64 and i don't think it's
necessary. with -mno-sse i don't think -mfpmath=sse remains the default for
amd64.
i've compiled two kernels. one with the standard -mno-sse* options in kernel.mk
and one without -mno-sse2, -mno-sse3, -mno-ssse3 and -mfpmath=387.
CPUYTE ?= core2.
diffing showed no major differences for gcc and clang as compiler
cheers.
alex
Clang has a similar mechanism, -mno-sse disables all 'higher' SSE
variants too.
--
a13x
--
a13x
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[TESTING] ssse3 backport from gcc 4.3
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=revisionrevision=117958 (applies cleanly) http://gcc.gnu.org/viewcvs?view=revisionrevision=121687 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=121726 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=123639 (small adjustment) ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [TESTING] ssse3 backport from gcc 4.3
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=revisionrevision=117958 (applies cleanly) http://gcc.gnu.org/viewcvs?view=revisionrevision=121687 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=121726 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=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? Regards ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [TESTING] ssse3 backport from gcc 4.3
On Wed, Mar 9, 2011 at 9:49 AM, George Liaskos geo.lias...@gmail.comwrote: 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=revisionrevision=117958 (applies cleanly) http://gcc.gnu.org/viewcvs?view=revisionrevision=121687 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=121726 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=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? Regards ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org I also had success with this patch - running on a Core 2 Duo E4500. rebuilt world kernel both with and without CPUTYPE=core2, so it at least doesn't break anything. Can you recommend a way to test Core2 specific features? dave c ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [TESTING] ssse3 backport from gcc 4.3
On Wed, Mar 09, 2011, Martin Matuska 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=revisionrevision=117958 (applies cleanly) http://gcc.gnu.org/viewcvs?view=revisionrevision=121687 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=121726 (small adjustment) http://gcc.gnu.org/viewcvs?view=revisionrevision=123639 (small adjustment) Cool. Ccing gerald@, who has requested that he be kept in the loop on gcc changes in the tree. The proliferation of -mno-sse -mno-sse2 -mno-sse3 options in the makefiles is probably not needed: I'm pretty sure -mno-sse implies the other two, unless -msse3 is specified explicitly. One suggestion from prior experience merging upstream gcc changes: Peruse the bug database for anything significant that was reported or fixed after the above patches were merged. ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
Re: [TESTING] ssse3 backport from gcc 4.3
On 2011-03-09 22:18, David Schultz wrote:
The proliferation of -mno-sse -mno-sse2 -mno-sse3 options in the
makefiles is probably not needed: I'm pretty sure -mno-sse implies
the other two, unless -msse3 is specified explicitly.
Indeed, contrib/gcc/config/i386/i386.c has:
static bool
ix86_handle_option (size_t code, const char *arg ATTRIBUTE_UNUSED, int value)
{
...
case OPT_msse:
if (!value)
{
target_flags = ~(MASK_SSE2 | MASK_SSE3);
target_flags_explicit |= MASK_SSE2 | MASK_SSE3;
}
return true;
E.g -mno-sse disables SSE2 and SSE3, unless you explicitly add -msse2 or
-msse3 options. In Martin's patch, this fragment uses MASK_SSSE3 too.
Clang has a similar mechanism, -mno-sse disables all 'higher' SSE
variants too.
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