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Re: PATCH: PR target/44046: Intel Core i5 M520 CPU detected as atom with -march=native
On Sun, May 9, 2010 at 7:47 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Sun, May 9, 2010 at 7:45 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
>>> Hi,
>>>
>>> This patch detects Atom, Core 2 and Core i7, based on CPU family and
>>> model. ?Tested on Atom, Core 2 and Core i7. ?OK for trunk and 4.5?
>>>
>>> Thanks.
>>>
>>>
>>> H.J.
>>> ---
>>> 2010-05-09 ?H.J. Lu ?<hongjiu.lu@intel.com>
>>>
>>> ? ? ? PR target/44046
>>> ? ? ? * config/i386/driver-i386.c (host_detect_local_cpu): Properly
>>> ? ? ? support Atom, Core 2 and Core i7.
>>>
>>> + ? ? case 0x17:
>>> + ? ? case 0x1d:
>>> + ? ? ? /* Penryn. ?FIXME: -mtune=core2 is slower than -mtune=generic ?*/
>>> + ? ? ? cpu = "core2";
>>> + ? ? ? break;
>>> + ? ? case 0x0f:
>>> + ? ? ? /* Merom. ?FIXME: -mtune=core2 is slower than -mtune=generic ?*/
>>> + ? ? ? cpu = "core2";
>>> + ? ? ? break;
>>
>> Can you just look through the core2 settings and fix those? ?It is definitly a bug.
>
> The main problem is there is no scheduler for Core 2. ?Hopefully, it
> will be fixed soon.
>
I meant to say is we are working on Core 2 optimization.
I'd like to backport to 4.4 also. OK for 4.4?
Thanks.
--
H.J.