Could we have generate inside an always block?

Question

I want to have sth like this:

generate  
   for( i=0 ; i<16 ; i=i+1 ) begin:  
      always @(posedge clk) begin  
         L[i+1] <= #1 R[i];  
         R[i+1] <= #1 L[i] ^ out[i];  
      end  
   end  
endgenerate

I would appreciate it if any one could possibly help me.

Marty · Accepted Answer · 2011-12-18 17:27:51Z

4

You don't need a generate here, I think. Just using a for loop within the always block will work.

always @(posedge clk) begin    
   for( int i=0 ; i<16 ; i=i+1 ) begin  
         L[i+1] <= #1 R[i];  
         R[i+1] <= #1 L[i] ^ out[i];  
   end  
end

A few questions you'd probably want to think about:

What size are the L and R buses? [15:0]?
Where are you assigning values to L[0] and R[0]?
Are you sure that i+1 when i hits 15 will be still within the bounds of your bus?

answered Dec 18, 2011 at 17:27

Marty

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2 Comments

Sohrab Over a year ago

thanks Marty, i have just one more question, is it synthesizable?

user597225 Over a year ago

#1 is not synthesizable but the tool will accept it and simply give you a warning.

user597225 · Accepted Answer · 2011-12-19 22:44:20Z

3

You could do

always @(posedge clk)
  begin
  L[16:1] <= #1 R[15:0]
  R[16:1] <= #1 L[15:0] ^ out;
  end

answered Dec 19, 2011 at 22:44

user597225

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