Re: Enhancement: Dynamic Values on attributes.

From: Adam Krolnik (krolnik@lsil.com)
Date: Mon Nov 03 2003 - 06:29:33 PST

  • Next message: Krishna Garlapati: "Re: Enhancement: Dynamic Values on attributes."

    Hi Krishna;

    >But how does the tool figure out that you are dealing with strings in
    >parameter unless the declaration was :

    >parameter string astr = {"R",8'h30 + i,"C0.S0"}; // i=2 => astr=R2C0.S0

    Each element is sized and then concatenated, just like verilog 1995.
    This line (below) is verilog-1995. You can do this today in VCS.
    The program I included compiles in VCS with the +v2k option
    for attributes.

    parameter astr = {"R",8'h30 + i,"C0.S0"}; // i=2 => astr=R2C0.S0

    module test;

    parameter astr = {"R",8'h30 + 8'd2,"C0.S0"};
    //(* astr = {"R",8'h30 + 8'd2,"C0.S0"} *)
    (* astr = astr *)
    reg adam;
    initial $display("astr parameter is %s.\n", astr);

    endmodule

    % vcs catstr.v
    ...
    Parsing design file '/tmp/catstr.v'
    Top Level Modules:
            test
    No TimeScale specified
    1 unique modules to generate
    Invoking loader...
    Chronologic VCS simulator copyright 1991-2003
    Contains Synopsys proprietary information.
    Compiler version 7.0.1; Runtime version 7.0.1; Nov 3 08:27 2003

    astr parameter is R2C0.S0.

                V C S S i m u l a t i o n R e p o r t

         Adam Krolnik
         Verification Mgr.
         LSI Logic Corp.
         Plano TX. 75074

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