Although the control unit as a whole requires 50 ps, it so happens that we can extract the correct value of the reg2loc control wire directly from the instruction. thus, the value of this control wire is available at the same time as the instruction. explain how we can extract this value directly from the instruction

The value of Reg2loc refers to a control signal given to the mux to select the value and given as input to read the Register 2.

Explanation:

Solution

The value of Reg2loc refers to a control signal given to the mux to select the value and given as input to read the Register 2.

Note: Although the control unit as a whole requires 50 ps, it so happens that we can extract the correct value of the reg2loc control wire directly from the instruction. thus, the value of this control wire is available at the same time as the instruction. explain how we can extract this value directly from the instruction

Hints: Carefully examine the opcodes shown in Figure 2.20. Also, Remember that LSR and LSL do not use the Rm field. Finally, ignore STXR.)

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