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In a load-store architecture, arithmetic instructions may take their operands from

  • A.the stack
  • B.registers only
  • C.registers or memory
  • D.memory only

Answer: B

Confining memory traffic to explicit load and store instructions is what makes the timing of every other instruction predictable, which matters as much for real time work as for pipelining. A CISC machine allows an add to fetch an operand from memory.

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