sxtb

Signed Extend Byte (Thumb)

SXTB <Rd>, <Rm>

Sign-extends byte to word (Thumb).

Details

The Signed Extend Byte instruction sign-extends byte to word (Thumb).

Pseudocode Operation

Rd ← sign/zero-extend(Rm)

Example

SXTB r0, r2

Encoding

Binary Layout
1011001001
Rm
Rd
 
Format Thumb Data Proc
Opcode 0xB240
Extension T32 (Thumb)

Operands

  • Rd
    Destination general-purpose register
  • Rm
    Second source / offset general-purpose register