People might say this, but it's not really true. All these instructions are deco...

		rwmj on Aug 24, 2016 \| parent \| context \| favorite \| on: Does a compiler use all x86 instructions? (2010) People might say this, but it's not really true. All these instructions are decomposed into micro-ops, and then the micro-ops are run in parallel - if data dependencies allow that - on a common pool of integer ALUs. The reason to use lea is for code compression - it allows you to express two or three operations in a single instruction.

On some Intel CPUs there are separate address-computation execution units.