A datapath similar to the one in Figure 8-1 has 64 registers. How many selection lines are needed for each set of multiplexers and for the decoder?

Figure 8-1

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Load enable Write D data 0123 Decoder D address Load Destination select Load Load Load Constant in- MB select n V4 C+ N Z A RO Zero Detect MF select R1 MD select R2 Bus A R3 G select, A LS2 C Arithmetic/logic unit (ALU) G n 0 MUX B B Bus D 0 1 MUX F F In Bus B B A address A select 0 1 MUX D 0122 3 2 MUX H select A data 2 L S 0-R n Shifter H B address B select 0123 IL Function unit MUX Register file B data -0 Address out Data out Data in