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scaled index

An index multiplied by the element size inside the memory operand, as in [rdi + rsi*4] for an array of 4-byte ints.

A scaled index is the index-register term of an effective address multiplied by a power of two, rsi*4 on x86-64 or x1, lsl #2 on ARM64, implementing base + i * sizeof(T) in one operand.

Examples

  • [rdi + rsi*4] indexes an array of 4-byte ints: element number rsi.

See also

effective address index register displacement memory operand
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