Question: 1.The subi (subtract immediate) instruction does not exist as an instruction in MIPS. subi $t0, $t1, 8 # Reg[$t0] = Reg[$t1] - 8 Which

1.The subi (subtract immediate) instruction does not exist as an instruction in

 

1.The subi (subtract immediate) instruction does not exist as an instruction in MIPS. subi $t0, $t1, 8 # Reg[$t0] = Reg[$t1] - 8 Which of the following is the reason why? (Select 1) A: All arithmetic instructions must be R-type. B: The immediate field must be a signed value. C: Pseudo instructions are useless. D: The same operation can be performed with the addi instruction because the immediate field is a 2's complement value 2. Which of the following correctly describes an opcode? (Select all that apply) A. The field is 5 bits of the instruction format. B. The opcode field is the most significant bits of each instruction. C. The opcode is unique for every instruction.

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