Question

in-order superscalar processors behave similarly to architectures because they must fetch, decode and execute instructions in lock step, similar to defining a larger instruction composed of multiple small instructions.

Answer 1

A superscalar processor can execute more than one instruction during a clock cycle in contrast to a scalar processor, which can only carry out one instruction at a time.

A superscalar processor is a CPU that uses instruction-level parallelism, a type of parallelism, on a single processor. A superscalar processor can execute more than one instruction during a clock cycle in contrast to a scalar processor, which can only carry out one instruction at a time. This is accomplished by simultaneously dispatching numerous instructions to various execution units inside the processor. As a result, it enables higher throughput than would otherwise be possible at a specific clock rate (the number of instructions that can be executed in a unit of time). Each execution unit is an execution resource within a single CPU, such as an arithmetic logic unit, rather than a separate processor (or a core if the processor is a multi-core processor).

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