<div dir="ltr">Quick update in reply to my own question: VEXTRACTF128 should not support zmm registers. Therefore, the current behavior is correct. This is the reference: <div><div><a href="https://www.felixcloutier.com/x86/VEXTRACTF128:VEXTRACTF32x4:VEXTRACTF64x2:VEXTRACTF32x8:VEXTRACTF64x4.html">https://www.felixcloutier.com/x86/VEXTRACTF128:VEXTRACTF32x4:VEXTRACTF64x2:VEXTRACTF32x8:VEXTRACTF64x4.html</a><br></div><div><br></div></div><div>Anyway, supporting <span style="color:rgb(0,0,0);font-family:"Times New Roman";font-size:medium">VEXTRACTF32x4 would help me.</span></div></div>