strex

Store Register Exclusive (Thumb)

STREX <Rd>, <Rt>, [<Rn>]

Stores word if exclusive monitor is open (Thumb).

Details

The Store Register Exclusive instruction stores word if exclusive monitor is open (Thumb).

Pseudocode Operation

Memory[address] ← Rt

Example

STREX r0, r3, [r1]

Encoding

Binary Layout
111010000100
Rn
Rt
Rd
imm8
 
Format Thumb Store Excl
Opcode 0xE8400000
Extension A32 (Atomic)

Operands

  • Rd
    Status
  • Rt
    Transfer general-purpose register (load/store)
  • Rn
    First source / base general-purpose register