Consider the following alternatives implemented exactly as described. K is zero for roughly every other cycle. Which has the lowest power consumption? K and In are 32-bits wide.

The clock periods are the same.

Question

Consider the following alternatives implemented exactly as described.  K is zero for roughly every other cycle.  Which has the lowest power consumption?  K and In are 32-bits wide. 
   
 The clock periods are the same.

Answer

always@(posedge clock) begin 
     if (K==0) begin  
         Inprev <= in;  
         Kprev <= 0; 
     end else Kprev <= K; 
     if (Kprev == 0) out <= 0; 
     else out = Kprev * Inprev; 
 end

Answer

always@(posedge clock) begin 
     if(K==0) out <= 0; 
     else out <= K * in; 
 end

Answer

always@(posedge clock) 
     out = K*in;

Crowdly

Consider the following alternatives implemented exactly as described. K is zero...

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