"Relaxed with fences" is not always what the hardware implements. ARMv8 [1] provides straight-up load-acquire and store-release instructions, matching C++. [1

"Relaxed with fences" is not always what the hardware implements. ARMv8 [1] provides straight-up load-acquire and store-release instructions, matching C++. [1] https://developer.arm.com/documentation/102336/0100/Load-Acquire-and-Store-Release-instructions https://developer.arm.com/documentation/102336/0100/Load-Acq...