i am working with mmx

[James E Wilson]

Ankit Jain wrote:
> well if i have loaded the register mm0 with 8, 8 byte
> values and want to extract just the 5 th byte then i
> am not able t odo so

This is a list for discussing gcc, not for explaining how to write 
programs.  You might get better help from gcc-help.

Try looking at an x86 architecture manual to see what instructions are 
available.  Also, look at the *mm*.h header files that gcc installs. 
These have a bunch of helper functions you can use to get individual 
mmx/sse/etc instructions emitted.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com