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Question

What is the LEA instruction used for?

a.

Performing arithmetic operations

b.

Quick additions and shifts

c.

Comparing two operands

d.

None of the above

Posted under Reverse Engineering

Answer: (b).Quick additions and shifts Explanation:On older implementations of IA-32, the LEA instruction was considered to be faster than ADD and SUB, which brought many compilers to use LEA for quick additions and shifts.

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