指令集分类(MISC,CISC,RISC,OISC,ZISC)

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转载:http://en.wikipedia.org/wiki/Minimal_instruction_set_computer

 

Minimal instruction set computer

Minimal Instruction Set Computer (MISC) is a processor architecture with a very small number of basic operations and corresponding opcodes. Such instruction sets are commonly stack based rather than register based to reduce the size of operand specifiers. Such a stack machine architecture is inherently simpler since all instructions operate on the top most stack entries. A result of this is a smaller instruction set, a smaller and faster instruction decode unit, and overall faster operation of individual instructions. The downside is that instructions tend to have more sequential dependencies, reducing instruction-level parallelism. MISC architectures have much in common with the Forth programming language and the Java Virtual Machine.

 

 

  • Complex instruction set computer (CISC)
  • Reduced instruction set computer (RISC)
  • One instruction set computer (OISC)
  • Zero instruction set computer (ZISC)

 

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