qsub8

Saturating Subtract 8

QSUB8<c> <Rd>, <Rn>, <Rm>

Parallel saturating subtract of 4 signed bytes.

Details

The Saturating Subtract 8 instruction parallel saturating subtract of 4 signed bytes.

Pseudocode Operation

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

Example

QSUB8 r0, r1, r2

Encoding

Binary Layout
cond
01100010
Rn
Rd
1111
1111
Rm
 
Format SIMD Integer
Opcode 0x06200FF0
Extension A32 (DSP)

Operands

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