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 SUPERSCALAR Definition
We define SUPERSCALAR |
SUPERSCALAR - A processor that is capable of executing more than one instruction during a processor cycle. Processors can do this by fetching multiple instructions in one cycle, deciding which instructions are independent of other instructions, and executing them. To do this the processor must have an instruction fetching unit that can fetch more than one instruction at a time, built-in logic to determine if instructions are independent, and multiple execution units to execute all the independent instructions. Instructions that depend on the results of the previous instruction obviously can't be executed simultaneously with the instructions on which they depend. This type of instruction slows down superscalar processors. If all instructions are of this type you get no benefit from the superscalar architecture. |
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