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Authors:
Linda Null ,julia Lobur
Chapter:
A Closer Look At Instruction Set Architectures
Exercise:
Review Of Essential Terms And Concepts
Question:1 | ISBN:9780763704445 | Edition: 3

Question

1. Explain the difference between register-to-register, register-to-memory, and memory-to-memory instructions.

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Answer

Difference between register-to-register, register-to-memory, and memory-to-memory instructions :

Register to register - Arguments involve only registers, data moves only within the registers, time execution is much faster and the length of the bus connecting the registers s the shortest.

Register to memory - Arguments involve a register and a memory location, data moves between a register and a location in memory, time of execution is slower and the length of the bus is longer.

Memory to memory - Arguments involve only memory locations, data moves between two locations in memory, time of execution is the slowest and the length of the bus is longer.

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