post-indexed addressing
An ARM64 memory operand that uses the base register's address as it is, then adds the offset to the register afterwards.
In ARM64 post-indexed addressing [xn], #imm the effective address is xn, and xn + imm is written back to xn after the access.
Examples
ARM64
ldr x0, [x1], #8loads fromx1first, then adds 8 tox1.
See also