Collectives™ on Stack Overflow
Find centralized, trusted content and collaborate around the technologies you use most.
Learn more about Collectives
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Learn more about Teams
cmp
is the comparison assembly instruction. It performs a comparison between two arguments by signed subtracting the right argument from the left and sets a CPU EFLAGS register. This EFLAGS register can then be used to do conditional branching / moving, etc.
First argument:
`%eax (the value in the %eax register)
Second argument:
0x80498d4(,%ebx,4). This is read as
offset ( base, index, scale )
In your example, the value of the second argument is the memory location offset
0x80498d4 + base (which I believe defaults to zero if not included) + value in %ebx register * 4 (scaling factor)
.
Note: I believe base here is empty and defaults to the value 0.
You can take a look at
http://docs.oracle.com/cd/E19120-01/open.solaris/817-5477/ennby/index.html
for more information on the syntax for Intel x86 assembly instructions.
Thanks for contributing an answer to Stack Overflow!
-
Please be sure to
answer the question
. Provide details and share your research!
But
avoid
…
-
Asking for help, clarification, or responding to other answers.
-
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our
tips on writing great answers
.
