PATCH: PR target/44046: Intel Core i5 M520 CPU detected as atom with -march=native

[H.J. Lu]

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.

> OK.
> Honza
>



-- 
H.J.