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Improved vcdcd.pl (added -d option)

This commit is contained in:
Clifford Wolf 2013-05-14 09:41:47 +02:00
parent be8ecd6d16
commit ff4a1dd06c
1 changed files with 82 additions and 8 deletions
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90
tests/tools/vcdcd.pl
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@ -9,17 +9,36 @@ use Verilog::VCD qw(parse_vcd list_sigs);
$| = 1; $| = 1;
my $opt_width = 0; my $opt_width = 0;
if ($ARGV[0] eq '-w') { my $opt_delay = 0;
$opt_width = +$ARGV[1];
shift @ARGV; while (1)
shift @ARGV; {
if ($ARGV[0] eq '-w') {
$opt_width = +$ARGV[1];
shift @ARGV;
shift @ARGV;
next;
}
if ($ARGV[0] eq '-d') {
$opt_delay = +$ARGV[1];
shift @ARGV;
shift @ARGV;
next;
}
last;
} }
if ($#ARGV != 1) { if ($#ARGV != 1) {
print STDERR "\n"; print STDERR "\n";
print STDERR "VCDCD - Value Change Dump Change Dumper\n"; print STDERR "VCDCD - Value Change Dump Change Dumper\n";
print STDERR "\n"; print STDERR "\n";
print STDERR "Usage: $0 [-w N] gold.vcd gate.vcd\n"; print STDERR "Usage: $0 [-w N] [-d N] gold.vcd gate.vcd\n";
print STDERR "\n";
print STDERR " -w N\n";
print STDERR " reserve N characters for bitmap in text ouput (default: auto)\n";
print STDERR "\n";
print STDERR " -d N\n";
print STDERR " allow for N timesteps delay between gate and gold (default: 0)\n";
print STDERR "\n"; print STDERR "\n";
print STDERR "Compare a known-good (gold) vcd file with a second (gate) vcd file.\n"; print STDERR "Compare a known-good (gold) vcd file with a second (gate) vcd file.\n";
print STDERR "This is not very efficient -- so use with care on large vcd files.\n"; print STDERR "This is not very efficient -- so use with care on large vcd files.\n";
@ -177,12 +196,16 @@ sub cmp_signal($$)
unshift @b, $trail_b while $#b < $#a; unshift @b, $trail_b while $#b < $#a;
for (my $i = 0; $i <= $#a; $i++) { for (my $i = 0; $i <= $#a; $i++) {
next if $a[$i] eq "-" || $b[$i] eq "-";
return 0 if $a[$i] ne "x" && $a[$i] ne $b[$i]; return 0 if $a[$i] ne "x" && $a[$i] ne $b[$i];
} }
return 1; return 1;
} }
# Message objects: .text, .time, .signal, .sync
my @messages;
print "Comparing vcd data..\n"; print "Comparing vcd data..\n";
for my $time (sort { $a <=> $b } keys %times) for my $time (sort { $a <=> $b } keys %times)
{ {
@ -199,15 +222,66 @@ for my $time (sort { $a <=> $b } keys %times)
$stga = $state_gate{$net} if exists $state_gate{$net}; $stga = $state_gate{$net} if exists $state_gate{$net};
if (cmp_signal($stgo, $stga)) { if (cmp_signal($stgo, $stga)) {
next if $signal_sync{$net}; next if $signal_sync{$net};
printf "%-10s %-20d %-*s %-*s %s\n", "<sync>", $time, $signal_maxlen, $stgo, $signal_maxlen, $stga, $net; my $message = { };
$message->{text} = sprintf "%-10s %-20d %-*s %-*s %s\n", "<sync>", $time, $signal_maxlen, $stgo, $signal_maxlen, $stga, $net;
$message->{time} = $time;
$message->{signal} = $net;
$message->{sync} = 1;
push @messages, $message;
$signal_sync{$net} = 1; $signal_sync{$net} = 1;
} else { } else {
printf "\n%-10s %-20s %-*s %-*s %s\n", "count", "time", $signal_maxlen, "gold", $signal_maxlen, "gate", "net" if $diffcount++ == 0; my $message = { };
printf "%-10d %-20d %-*s %-*s %s\n", $diffcount, $time, $signal_maxlen, $stgo, $signal_maxlen, $stga, $net; $message->{text} = sprintf "%-10d %-20d %-*s %-*s %s\n", $diffcount, $time, $signal_maxlen, $stgo, $signal_maxlen, $stga, $net;
$message->{time} = $time;
$message->{signal} = $net;
$message->{sync} = 0;
push @messages, $message;
$signal_sync{$net} = 0; $signal_sync{$net} = 0;
$diffcount++;
} }
} }
} }
print "Found $diffcount differences.\n"; print "Found $diffcount differences.\n";
if ($opt_delay > 0) {
my %per_net_history;
my $removed_diff_count = 0;
for (my $i = 0; $i <= $#messages; $i++) {
my $message = $messages[$i];
$message->{deleted} = 0;
$per_net_history{$message->{signal}} = [ ] unless exists $per_net_history{$message->{signal}};
if ($message->{sync}) {
my $deleted_all = 1;
for my $j (@{$per_net_history{$message->{signal}}}) {
my $m = $messages[$j];
if ($m->{time} + $opt_delay >= $message->{time}) {
$m->{deleted} = 1;
$removed_diff_count++;
} else {
$deleted_all = 0;
}
}
$message->{deleted} = 1 if $deleted_all;
$per_net_history{$message->{signal}} = [ ];
} else {
push @{$per_net_history{$message->{signal}}}, $i;
}
}
my @new_messages;
for my $message (@messages) {
push @new_messages, $message unless $message->{deleted};
}
@messages = @new_messages;
printf "Removed %d differences using delay filtering.\n", $removed_diff_count;
$diffcount = $diffcount - $removed_diff_count;
}
if ($#messages >= 0) {
printf "\n%-10s %-20s %-*s %-*s %s\n", "count", "time", $signal_maxlen, "gold", $signal_maxlen, "gate", "net" if $diffcount++ == 0;
for (my $i = 0; $i <= $#messages; $i++) {
printf "%s", $messages[$i]->{text};
}
}
exit ($diffcount > 0 ? 1 : 0); exit ($diffcount > 0 ? 1 : 0);