Atomic bit set on halfword in memory, without return.
Xn|SP] ; No memory ordering general registers
Xn|SP] ; Release general registers
- Is the 32-bit name of the general-purpose register holding the data value to be operated on with the contents of the memory location.
- Is the 64-bit name of the general-purpose base register or stack pointer.
Supported in ARMv8.1 and later.
Atomic bit set on halfword in memory, without return, atomically loads a 16-bit halfword from memory, performs a bitwise OR with the value held in a register on it, and stores the result back to memory.
STSETHhas no memory ordering semantics.
STSETLHstores to memory with release semantics, as described in Load-Acquire, Store-Release in the ARMv8-A Architecture Reference Manual.
For information about memory accesses see Load/Store addressing modes in the ARMv8-A Architecture Reference Manual.