As the title says, what's the first x86 processor from Intel that supports the following addressing mode?

mov %reg, 8(base, index, 4)

where the content of %reg will be stored to the address base + 4*index + 8 (both base and index are registers).

I only know that 8086 doesn't support this and 80586 supports this. I'm guessing it's 80386 because it's the first 32-bit x86 Intel CPU?

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    Downvote button says "This question does not show any research effort" so that's what I'm clicking. Stack Exchange is not supposed to be the first stop.
    – pipe
    Apr 28, 2019 at 0:18

1 Answer 1


This addressing mode was introduced with the first 32-bit x86 processor, i.e. the 80386.

Ref: 80386 Programmer's reference manual sec

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