Over time, Intel and other processor vendors add more and more instructions to the processors that power our phones, tablets, laptops, workstations, servers, and other computing devices. Adding instructions for particular compute tasks is a good way to gain processing efficiency without the need to make processor pipelines more complex or drive clock frequencies into unattainable territories. If a new instruction can replace a few old ones, you can easily get many times better performance on particular tasks. New instructions also provide entirely new functionality – for example, Intel® Software Guard Extensions (SGX) and Intel® Control-Flow Enforcement (CET).
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