s (MAXVL-1:32) of the corresponding destination register remain unchanged.</p>
<p>VEX.128 and EVEX encoded versions: Bits (127:32) of the XMM register destination are copied from corresponding bits in the first source operand. Bits (MAXVL-1:128) of the destination register are zeroed.</p>
<p>EVEX encoded version: The low doubleword element of the destination operand is updated according to the writemask.</p>
<p>Software should ensure VSUBSS is encoded with VEX.L=0. Encoding VSUBSD with VEX.L=1 may encounter