lea assembly instruction

Question

I Just want to make sure I am reading this right:

movl 12(%ebp), %edx
leal (%edx, %edx, 4), %eax

I read the first line as: edx = [epb

Answer 1

You're right. The LEA instruction is used to Load (the) Effective Address, and can be used for address arithmetic and sometimes also ordinary arithmetic, if you don't need the flags.