|Home > Appendices > UNPREDICTABLE Behaviors > Load exclusive and Store exclusive accesses|
Instructions which can generate an exclusive memory access such as
STREX have a number of restrictions and behavior defined as unpredictable in the Armv8‑M architecture.
In the Cortex®‑M33 processor:
0xE00FFFFF) do not update the internal local exclusive monitor. Load exclusive instructions load data into a register and Store exclusive instructions store data from a register. For
STLEXinstructions, the status register is always updated with the value 0, indicating the store has updated memory.