https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
Samantha Keen changed:
What|Removed |Added
CC||pokox38850 at tohup dot com
--- Comment
--- Comment #27 from rootkit85 at yahoo dot it 2010-08-31 18:02 ---
you could try but i'm not sure that NOPL is mandatory for the i686 arch
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #26 from andrew at atrens dot ca 2010-08-31 17:14 ---
(In reply to comment #25)
> try -march=i686 it should be the best
>
What about the fact that Geode LX does not have a NOPL instruction, while i686
does. Couldn't that result in binaries that crash?
--Andrew
--
http
--- Comment #25 from rootkit85 at yahoo dot it 2010-08-22 13:34 ---
try -march=i686 it should be the best
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #24 from eren at pardus dot org dot tr 2010-08-19 09:13 ---
What's the situation right now, is there any progress?
I have Geode LX 800MHz, and the code compiled for generic x86 architectures
runs really slow . I'm thinking of producing optimized packages for Geode LX,
howeve
--- Comment #23 from rootkit85 at yahoo dot it 2009-11-16 10:02 ---
Despite its name Geode GX, LX and NX are very different, I guess that we should
split them to geode-gx and geode-lx, and alias geode-nx to k7
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #22 from ubizjak at gmail dot com 2009-11-10 07:45 ---
(In reply to comment #20)
> Yes K6 is the best fallback for geode-lx, while pentium-mmx is the best one
> for
> geode.
BTW, recommended fallback is K6-2.
> I need to know if this new -march argument will be added so I
--- Comment #21 from rootkit85 at yahoo dot it 2009-11-09 21:59 ---
Created an attachment (id=19001)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19001&action=view)
A patch which adds Geode LX support to GCC
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #20 from rootkit85 at yahoo dot it 2009-11-09 20:25 ---
Yes K6 is the best fallback for geode-lx, while pentium-mmx is the best one for
geode.
I need to know if this new -march argument will be added so I edit the kernel
patch.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi
--- Comment #19 from ubizjak at gmail dot com 2009-11-09 18:16 ---
(In reply to comment #18)
> As I did here?
>
> http://patchwork.kernel.org/patch/51410/
Yes, but I don't know if perhaps -march=k6-2 should be used as a fallback, as
suggested in [1].
BTW: You can change optimization b
--- Comment #18 from rootkit85 at yahoo dot it 2009-11-09 15:26 ---
As I did here?
http://patchwork.kernel.org/patch/51410/
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #17 from ubizjak at gmail dot com 2009-11-09 15:10 ---
(In reply to comment #16)
> Yes, it seems that even old Geode has such instructions:
So, I guess they should be listed under in
linux-2.6/arch/x86/Kconfig.cpu.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #16 from rootkit85 at yahoo dot it 2009-11-09 13:17 ---
Yes, it seems that even old Geode has such instructions:
# cat /proc/cpuinfo
processor : 0
vendor_id : Geode by NSC
cpu family : 5
model : 9
model name : Unknown
stepping: 1
cpu
--- Comment #15 from ubizjak at gmail dot com 2009-11-09 11:48 ---
(In reply to comment #7)
> -march=geode disables cmov because the real geode does not have cmov :).
No, all geodes have cmov.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #14 from ubizjak at gmail dot com 2009-11-09 10:47 ---
(In reply to comment #11)
> There is also geode NX, IIRC it represents itself as Athlon, but someone
> should
> confirm this.
According to [1], cpuid for Geode NX returns "AMD Geode NX 1750", and this
string doesn't tr
--- Comment #13 from ubizjak at gmail dot com 2009-11-09 10:34 ---
Created an attachment (id=18997)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18997&action=view)
Patch that introduces geode-lx CPU option
Can you patch the compiler with attached patch?
"gcc -march=native -### h
--- Comment #12 from ubizjak at gmail dot com 2009-11-09 10:28 ---
Reopened to clear this geode mess.
--
ubizjak at gmail dot com changed:
What|Removed |Added
--- Comment #11 from ubizjak at gmail dot com 2009-11-09 10:28 ---
OK, according to your benchmarks and documentation qoute, it looks we have to
split "geode-lx" out of generic "geode" option.
So, can you confirm, that the difference between generic geode and geode-lx is
presence of CMO
--- Comment #10 from ubizjak at gmail dot com 2009-11-09 09:34 ---
(In reply to comment #8)
> 1) define "real geode"
> 2) what CPU do I have?
http://en.wikipedia.org/wiki/Geode_%28processor%29#AMD_Geode
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #9 from rootkit85 at yahoo dot it 2009-11-09 09:01 ---
Read here pag. 15:
http://www.amd.com/files/connectivitysolutions/geode/geode_lx/33234F_LX_databook.pdf
"The instruction set supported by the core is a combination
of Intel Pentium® processor, AMD Athlon™ processor, and
--- Comment #8 from rootkit85 at yahoo dot it 2009-11-09 08:55 ---
1) define "real geode"
2) what CPU do I have?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #7 from pinskia at gcc dot gnu dot org 2009-11-09 03:31 ---
-march=geode disables cmov because the real geode does not have cmov :).
This is why it is much slower.
--
pinskia at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #6 from rootkit85 at yahoo dot it 2009-11-08 22:34 ---
(In reply to comment #5)
> Subject: Re: Code optimized for AMD Geode is slower than generic
>
>
>
> Sent from my iPhone
>
> On Nov 8, 2009, at 11:52 AM, "rootkit85 at yahoo dot it"
> > wrote:
>
> >
> >
> > ---
--- Comment #5 from pinskia at gmail dot com 2009-11-08 19:57 ---
Subject: Re: Code optimized for AMD Geode is slower than generic
Sent from my iPhone
On Nov 8, 2009, at 11:52 AM, "rootkit85 at yahoo dot it"
wrote:
>
>
> --- Comment #4 from rootkit85 at yahoo dot it 2009-11-0
Sent from my iPhone
On Nov 8, 2009, at 11:52 AM, "rootkit85 at yahoo dot it" > wrote:
--- Comment #4 from rootkit85 at yahoo dot it 2009-11-08 19:52
---
# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 10
model name
--- Comment #4 from rootkit85 at yahoo dot it 2009-11-08 19:52 ---
# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 10
model name : Geode(TM) Integrated Processor by AMD PCS
stepping: 2
cpu MHz : 498.060
cac
--- Comment #3 from rguenth at gcc dot gnu dot org 2009-11-08 19:00 ---
Try -march=native instead.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989
--- Comment #2 from pinskia at gcc dot gnu dot org 2009-11-08 18:55 ---
On which Geode is this on? Is this with the first generation Geode or the one
AMD made? Because if it is the latter, it is not really a Geode but a k6/k7
based processor.
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