ldrexb

Load Register Exclusive Byte (Thumb)

LDREXB <Rt>, [<Rn>]

Loads byte exclusively (Thumb).

Details

The Load Register Exclusive Byte instruction loads byte exclusively (Thumb).

Pseudocode Operation

Rt ← Memory[address]

Example

LDREXB r3, [r1]

Encoding

Binary Layout
111010001101
Rn
Rt
1111
0100
1111
 
Format Thumb Load Excl
Opcode 0xE8D00F4F
Extension A32 (Atomic)

Operands

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