The Essentials ofComputer(computer) 444

The Essentials ofComputer(computer) 444 - one aspect of...

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one aspect of superscalar design, and for this reason, there is often confusion regarding which is which. So, what exactly is a superscalar processor? We know that the Pentium processor is superscalar, but have yet to discuss what this really means. Super- scalar is a design methodology that allows multiple instructions to be executed simultaneously in each cycle. Although superscalar differs from pipelining in sev- eral ways that will be discussed shortly, the net effect is the same. The way in which superscalar designs achieve speedup is similar to the idea of adding another lane to a busy single lane highway. Additional “hardware” is required, but in the end, more cars (instructions) can get from point A to point B in the same amount of time. The superscalar components analogous to our additional highway lanes are called execution units . Execution units consist of floating-point adders and multi- pliers, integer adders and multipliers, and other specialized components.
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  • Fall '14
  • tylor
  • Central processing unit, Superscalar, execution units, superscalar design, complex decoding unit

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