ucomisd

Unordered Compare Scalar Double-Precision

UCOMISD xmm1, xmm2/m64

Compares low double and sets EFLAGS.

Details

The Unordered Compare Scalar Double-Precision instruction compares low double and sets EFLAGS.

Pseudocode Operation

// Compares low double and sets EFLAGS

Example

UCOMISD xmm1, xmm2/m64

Encoding

Binary Layout
66
+0
0F
+1
2E
+2
 
Format SSE2
Opcode 66 0F 2E
Extension SSE2

Operands

  • dest
    128-bit XMM SIMD register
  • src
    128-bit XMM SIMD register or Memory operand