From: Michael McNamara (mac@surefirev.com)
Date: Wed Apr 14 1999 - 08:24:28 PDT
Adam Krolnik writes:
>
>
> Good morning Tom;
>
>
> Generated instance names are strings! They are not arrays. As
> such, one can't use a loop to iterate through several of them. One
> must use explicit generation of them.
>
> module top;
> integer j;
> wire[3:0] b;
> reg [3:0] a,c[0:3];
> genvar i;
> parameter N = 4; // ACK added for example.
>
> generate for (i = 0; i < N; i = i+1)
> foo f(a[i],b[i]);
> endgenerate
>
> initial begin
> c[0] = f[0].bar;
> c[1] = f[1].bar;
> c[2] = f[2].bar;
> c[3] = f[3].bar;
> end
>
> endmodule
>
> And to show the weakness of the generate proposal, one can't build
> that initial block with any generate statement except for something
> like this:
>
> generate case (N)
> 2: begin
> initial begin
> c[0] = f[0].bar;
> c[1] = f[1].bar;
> end
> end
> 3: begin
> initial begin
> c[0] = f[0].bar;
> c[1] = f[1].bar;
> c[2] = f[2].bar;
> end
> end
> 4: begin
> initial begin
> c[0] = f[0].bar;
> c[1] = f[1].bar;
> c[2] = f[2].bar;
> c[3] = f[3].bar;
> end
> end
> endgenerate
>
> A better approach would be simply:
>
> genvar j;
> initial begin
> generate for(j=0;j<N;j=j+1)
> c[j] = f[j].bar;
> endgenerate
> end
>
> But one can't have a generate statement within any block or
> instantiation.
Could one do:
genvar j;
generate for(j=0;j<N;j=j+1)
initial c[j] = f[j].bar;
endgenerate
I.E., make N initial statements ?
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