#!/usr/bin/perl

my @sigbits;

while (<>) {
        if (/gpio=0x(\w+)/) {
                my $bin = sprintf("%b",hex $1);
                print $bin."\n";
                my $pos = 0;
                while ($bin) {
                        my $a = substr($bin,-1,1,'');
                        if ($a) {
                                $sigbits[$pos] = $a;
                        }
                        $pos++;
                }
        }
}

my $sigbits;
foreach my $bit (@sigbits) {
        $sigbits=$sigbits.$bit;
}
print "Significant bits: $sigbits (".sprintf("0x%x",oct("0b$sigbits")).")\n";