------- Additional Comments From hjl at lucon dot org  2007-03-21 15:49 -------
0x90 nop doesn't take a operand. There is no such an instruction:

41 90 xchg %r8, %rax

Assembler will assembe "xchg %r8, %rax" as "49 90 xchg %rax,%r8".

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl at lucon dot org
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


http://sourceware.org/bugzilla/show_bug.cgi?id=4218

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