pclmulqdq

Carry-Less Multiplication

PCLMULQDQ xmm1, xmm2/m128, imm8

Performs carry-less multiplication (Galois Field math for AES-GCM).

Details

The Carry-Less Multiplication instruction performs carry-less multiplication (Galois Field math for AES-GCM).

Pseudocode Operation

// Performs carry-less multiplication (Galois Field math for AES-GCM)

Example

PCLMULQDQ xmm1, xmm2/m128, 3

Encoding

Binary Layout
66
+0
0F
+1
3A
+2
44
+3
 
Format PCLMUL
Opcode 66 0F 3A 44
Extension PCLMULQDQ

Operands

  • dest
    128-bit XMM SIMD register
  • src1
    128-bit XMM SIMD register or Memory operand
  • src2
    8-bit signed immediate