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the difference between CPU architecture


Hi all 

# sorry for not writing the subject on last e-mail.
# I'll resend one with the subject.
I have a question about the difference when choosing 
different CPU architecture with march option. 

What I wanna know about, is the difference when I choose 
"-march=c3-2,-march=i686" and "-march=c3,-march=i486". 
Yes, the difference between the C3(Nehemiah core) and the 
C3(not Nehemiah core). 

And also, is there any problem in using the C3(not Nehemiah) 
binary on Nehemiah core machine ? 

Thanks in advance !!! 

# I was trying to find the difference when I compile the  
# kernel, so I asked question to the kernel mailing-list, 
# but couldn't get the answer. 
# So I thought this might be a libc question. 
# Sorry for the multi post, but I'll mail the answer to 
# the kernel mailing-list, too. 

======================= 
Hideaki Nemoto 
e-mail:eme@v003.vaio.ne.jp 
======================= 


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