I had finished my code , thank you for your help!

#!/usr/bin/perl
use 5.010;
use strict;
use warnings;

my $reS = qr{\..*?\s*?\(\s*?([0-9a-zA-Z_]*?)\s*?\)}s;
my $reM = qr{\..*?\s*?\(\s*?\{\s*?(.*?)\s*?\}\s*?\)}s;
open my $fh, "analog_atop_inst.v" or die $!; 
my @fields=();
my @matchM=();
my @matchS=();
my @allfield=();
my $entire_dataS = '';
my $entire_dataM = '';

while (<$fh>) { chomp; $entire_dataS .= $_; $entire_dataM .= $_; }
#print $entire_data;

while (1) { 
if ($entire_dataS =~ /$reS/){
    push @matchS, $1;
    $entire_dataS = $';}
else {
    last;}
}
while (1) { 
if ($entire_dataM =~ /$reM/){
    push @matchM, $1;
    $entire_dataM = $';}
else {
    last;}
}
    #say "@@@@@@@@@@@@  MatchS  @@@@@@@@@@@@@@@@@";
    foreach my $fieldS (@matchS){
          push @allfield, $fieldS ;
    }
    #say "############  MatchM  #################";
    foreach my $fieldM (@matchM){
        my @fieldsplit = split / ,\s+/, $fieldM;
        foreach my $fieldMs (@fieldsplit){
          push @allfield, $fieldMs ;
        }
    }
    foreach my $fieldT (@allfield){
        say $fieldT;
    }
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