ldrex

Load Register Exclusive (Thumb)

LDREX <Rt>, [<Rn>]

Loads word and sets exclusive monitor (Thumb).

Details

The Load Register Exclusive instruction loads word and sets exclusive monitor (Thumb).

Pseudocode Operation

Rt ← Memory[address]

Example

LDREX r3, [r1]

Encoding

Binary Layout
111010000101
Rn
Rt
imm8
 
Format Thumb Load Excl
Opcode 0xE8500F00
Extension A32 (Atomic)

Operands

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