stxp

Store Exclusive Pair

STXP <Ws>, <Wt1>, <Wt2>, [<Xn|SP>]

Stores two registers if exclusive monitor matches.

Details

The Store Exclusive Pair instruction stores two registers if exclusive monitor matches.

Pseudocode Operation

Memory[address] ← Wt1

Example

STXP w6, w3, w4, [x1]

Encoding

Binary Layout
10001000
001
00000
Rs
Rt2
Rn
Rt1
 
Format Load/Store Excl
Opcode 0x88207C00
Extension Base (Atomic)

Operands

  • Ws
    Status
  • Wt1
    First transfer 32-bit register (load/store pair)
  • Wt2
    Second transfer 32-bit register (load/store pair)
  • Xn
    First source / base 64-bit integer register