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Re: gcc -march=nocona -mtune=nocona --help=target


Ian Lance Taylor ÐÐÐÐÑÐÐ(ÐÐ):
> Oleg Kravchenko <oleg@kaa.org.ua> writes:
>
>   
>> Ian Lance Taylor ÐÐÐÐÑÐÐ(ÐÐ):
>>     
>>> Oleg Kravchenko <oleg@kaa.org.ua> writes:
>>>
>>>   
>>>       
>>>> Why gcc say what mmx, sse, sse2 is disabled?
>>>>
>>>> $ gcc -march=nocona -mtune=nocona --help=target
>>>>     
>>>>         
>>> They are disabled because you didn't explicitly request them.
>>>
>>> Ian
>>>   
>>>       
>> It's mean my code will be compiled without optimization?
>>     
>
> Please send e-mail to the list, not just to me.  Thanks.
>
> I assume you are asking whether the code will use SSE instructions if
> appropriate.  Yes, it will, because you specified -march with a
> processor that supports SSE.  The output of --help=target just tells you
> the status of the various command line options; it doesn't tell you
> which architecture will be used.
>
> Ian
>   
Thank you very much! :)


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