 Modern CISC implementations, such as the x86 family, decode instructions into dynamically buffered micro-operations ("μops") with an instruction encoding similar to RISC or traditional microcode.A hardwired instruction decode unit directly emits μops for common x86 instructions, but falls back to a more traditional microcode ROM for more complex or rarely used instructions.For example, an x86 might look up μops from microcode to handle complex multistep operations such as loop or string instructions, floating point unit transcendental functions or unusual values such as denormal numbers, and special purpose instructions such as CPUID.