What does (register1, register2, 4) mean in AT&T assembly?
For example:
cmp %eax, (%esi, %ebx, 4) 
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1 Answer
The complete AT&T base/index register syntax is:
offset(base, index, multiplier) Your offset field is 0, so you just have the (base, index, multiplier) part. In your case, you're comparing the contents of the eax register to the 32-bit value located at esi + (ebx * 4).
In the Intel syntax you might be more familiar with, this would be written as:
cmp [ebx*4 + esi], eax 
