在数字IC设计过程中，根据顶层生成testbench时存在很多重复性工作，因此为了提高工作效率，特地开发此脚本。
相应的python脚本见链接： 【效率提升—Python脚本】根据Verilog文件自动生成tb文件

Verilog端口文件（仅做示范用）

对应的tb文件

相应代码

use strict;
open R_FILE,"w_ctl.v" or die "can't open file:$!";
open W_FILE,"> tb.v" or die "can't touch tb file:$!";
my @in;
my @in_reg;
my @ou;
my @ou_wire;
my @par;
my $mo;
while(<R_FILE>){
    if(/module\s+(\w+)/){
         $mo=$1;
    }elsif(/(parameter\s+\w+\s?=\s?\d+)/){
        push(@par,$1);
    }elsif(/input\s+(\[\S+:\d+\])?\s+(\w+)/){
        push(@in_reg,$1);
        push(@in,$2);
    }elsif(/output\s+\S*?(\[\S+:\d+\])?\s+(\w+)/){
        push(@ou_wire,$1);
        push(@ou,$2);
    }else{
        next;
    }
}
print W_FILE "`timescale 1ns/1ps\n";
print W_FILE "module tb_$mo();\n\n";
foreach(@par){
    print W_FILE "$_\n";
}
print W_FILE "\n";
foreach(0..$#in_reg){
    print W_FILE "reg\t\t$in_reg[$_]\t$in[$_];\n";
}
foreach(0..$#ou_wire){
    print W_FILE "wire\t\t$ou_wire[$_]\t$ou[$_];\n";
}
print W_FILE "\n";
print W_FILE "initial begin\n";
foreach(@in){
    print W_FILE "\t$_='d0;\n";
}
foreach(@in){
    if(/rst_n/){
        print W_FILE "\t#100\t$_=1'b1;\n";
    }else{
        next;
    }
}
print W_FILE "end\n\n";
foreach(@in){
    if(/clk$/){  
        print W_FILE "always #2.5 $_=~$_;\n";
    }else{
        next;
    }
}
print W_FILE "//this is auto-inst\n";
print W_FILE "$mo\tU_$mo(\n";
print W_FILE "\t//input signal\n";
foreach(@in){
    print W_FILE "\t.$_($_),\n";
}
print W_FILE "\t//output signal\n";
foreach(0..$#ou-1){
    print W_FILE "\t.$ou[$_]($ou[$_]),\n";
    
}
print W_FILE "\t.$ou[-1]($ou[-1]));\n\n";
print W_FILE "endmodule";
close R_FILE;
close W_FILE;

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