Comment by jxors

> However, in this case it doesn’t matter; those top bits are discarded when the result is written to the 32-bit eax.

Fun (but useless) fact: This being x86, of course there are at least three different ways [1] to encode this instruction: the way it was shown, with an address size override prefix (giving `lea eax, [edi+esi]`), or with both a REX prefix and an address size override prefix (giving `lea rax, [edi+esi]`).

And if you have a segment with base=0 around you can also add in a segment for fun: `lea rax, cs:[edi+esi]`

[1]: not counting redundant prefixes and different ModRMs