rsb

Reverse Subtract (Thumb)

RSB <Rd>, <Rn>, #0

Reverse Subtract (Thumb 16-bit).

Details

The Reverse Subtract instruction reverse Subtract (Thumb 16-bit).

Pseudocode Operation

Rd ← Rn - SRC2
// Flags affected: N, Z, C, V

Example

RSB r0, r1, #0

Encoding

Binary Layout
0100001001
Rn
Rd
 
Format Thumb Data Proc
Opcode 0x4240
Extension T32 (Thumb)

Operands

  • Rd
    Destination general-purpose register
  • Rn
    First source / base general-purpose register