The MIPS Instruction Formats

• All MIPS instructions are 32 bits long. The three instruction formats:

  
  
  • R-type
    
  • I-type
    
  • J-type

• The different fields are:

  • op: operation of the instruction
  • rs, rt, rd: the source and destination register specifiers
  • shamt: shift amount
  • funct: selects the variant of the operation in the “op” field
  • address / immediate: address offset or immediate value
  • target address: target address of the jump instruction

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