perand is an YMM register or a 256-bit memory location. The first source operand and destination operands are YMM registers.</p>
<p>Note: VEX.L must be 0, otherwise instructions will #UD.</p>
<h2>Operation</h2>
<p><strong>PSUBQ (with 64-Bit operands)</strong></p>
<pre>    DEST[63:0] ← DEST[63:0] − SRC[63:0];</pre>
<p><strong>PSUBQ (with 128-Bit operands)</strong></p>
<pre>    DEST[63:0] ← DEST[63:0] − SRC[63:0];
    DEST[127:64] ← DEST[127:64] − SRC[127:64];</pre>
<p><strong>VPSUBQ (VEX.128 enco