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{{short description|Variation on a microprocessor's instruction set architecture (ISA) that allows instructions to be represented in a more compact format}}
A '''compressed instruction set''', or simply '''compressed instructions''', are a variation on a [[microprocessor]]'s [[instruction set architecture]] (ISA) that allows instructions to be represented in a more compact format. In most real-world examples, compressed instructions are 16 bits long in a processor that would otherwise use 32-bit instructions. It is distinct from the concept of [[variable length instructions]], where any instruction can have any length; in a compressed set the instructions are alternative forms for existing 32-bit versions.
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