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STSETH, STSETLH

Atomic bit set on halfword in memory, without return.

Syntax

STSETH Ws, [Xn|SP] ; No memory ordering general registers

STSETLH Ws, [Xn|SP] ; Release general registers

Where:

Ws
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.
Xn|SP
Is the 64-bit name of the general-purpose base register or stack pointer.

Architectures supported

Supported in the Arm®v8.1 architecture and later.

Usage

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.

For information about memory accesses see Load/Store addressing modes in the Arm® Architecture Reference Manual Arm®v8, for Arm®v8‑A architecture profile.

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