h2>
<p>The one-byte NOP instruction is an alias mnemonic for the XCHG (E)AX, (E)AX instruction.</p>
<p>The multi-byte NOP instruction performs no operation on supported processors and generates undefined opcode exception on processors that do not support the multi-byte NOP instruction.</p>
<p>The memory operand form of the instruction allows software to create a byte sequence of “no operation” as one instruction. For situations where multiple-byte NOPs are needed, the recommended operations (32-bit mode