Newb18 Newb18 - 1 month ago 17
C Question

Learning Assembly num funtion

So I'm learning Assembly and i have come across this code:

movl num(,%eax,4), %eax


Can someone explain what that num() function is?

Answer

It is not a function, it is an element of the AT&T assembly syntax. That line means "move 32-bit value at address eax*4 + num to eax".

In Intel syntax it would be mov eax, [eax*4 + num].

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