Ask HW: How to find REX prefix, Modr/M, SIB, Displacement? in x86-64 assembly

1 BitShift_- 0 8/12/2025, 10:56:16 AM
How to find REX prefix, ModR/M, SIB, and Displacement bytes in x86-64 machine code?

please explain step-by-step using the example instruction:

mov rax, [r8 + rcx * 8 + 0x10]

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