smlsd

Signed Multiply Subtract Dual

SMLSD{X}<c> <Rd>, <Rn>, <Rm>, <Ra>

Dual multiply subtract + accumulate.

Details

The Signed Multiply Subtract Dual instruction dual multiply subtract + accumulate.

Pseudocode Operation

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

Example

SMLSD r0, r1, r2, r5

Encoding

Binary Layout
cond
01110000
Rn
Rd
Ra
0101
Rm
 
Format Multiply
Opcode 0x07000050
Extension A32 (DSP)

Operands

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