Load-Acquire Register Halfword.
- Is the 32-bit name of the general-purpose register to be transferred.
- Is the 64-bit name of the general-purpose base register or stack pointer.
Load-Acquire Register Halfword derives an address from a base register value, loads a halfword from memory, zero-extends it, and writes it to a register. The instruction also has memory ordering semantics as described in Load-Acquire, Store-Release. For information about memory accesses, see Load/Store addressing modes in the ARM Architecture Reference Manual ARMv8, for ARMv8-A architecture profile.