《计算机组成与设计》David A.Patterson-英文原版之处理器思维导图（一）

Description:left side is main types of instructions and the right side is the implementation of the instruction

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• the value written into the PC can come from one of the adders.
• the data written into the register file come from either the ALU or the data memory.
• the second input of the ALU can come from a register or the immediate field of the instruction.

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5.
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Description:then! state element can be read and written in the same clock cycle