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Altera_Forum's avatar
Altera_Forum
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15 years ago

Is this code synthesizable with Quartus?

Hi all,

I'm new in the industry, and now I have one code using the for loops.

Someone suggests that it could not be synthesizable. Could anyone explain why?

Thanks in advance. 


integer i,N;
parmeter N=7;
reg  A;
 
always @ (A)
  begin
    oddparity=1'b0;
    for(i=0;i<=N;i=i+1)
      if(A) oddparity=~oddparity;
  end

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    It's synthesizable, because it's simply evaluates to an XOR of all bits of A, but it can be simplified to 

    oddparity =^ A; // reduction XOR operator