[PATCH, Atom] Fix performance regression with -mtune=atom

Vladimir Yakovlev vbyakovl23@gmail.com
Fri Oct 14 14:49:00 GMT 2011


Could anyone checkin that?

Thanks,
Vladimir

2011/10/14 Uros Bizjak <ubizjak@gmail.com>:
> Hello!
>
>> This is a ping. Change affects Atom only and was made because it
>> really gives better performance on this architecture. This fact
>> actually leads to the thought that old value is just a simple
>> misprint.
>>
>> > This patch fixes performance regression with -mtune=atom. Changing
>> > atom cost removes regression in several tests of EEMBC and spec2000.
>> > Bootstrap amd make check Ok for both with and witout -mtune-atom.
>> > OK for trunk?
>> >
>> > 2011-09-30 ?Yakovlev Vladimir ?vladimir.b.yakovlev@intel.com
>> >
>> > ? ? ?* gcc/config/i386/i386.c (atom_cost): Changed cost for loading
>> > ? ? ? QImode using movzbl.
>
> OK.
>
> Thanks,
> Uros.
>



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