diff options
| -rwxr-xr-x | tests/tools/vcdcd.pl | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/tests/tools/vcdcd.pl b/tests/tools/vcdcd.pl index 4875eeeb0..93041534b 100755 --- a/tests/tools/vcdcd.pl +++ b/tests/tools/vcdcd.pl @@ -8,14 +8,21 @@ use Verilog::VCD qw(parse_vcd list_sigs); $| = 1; +my $opt_width = 0; +if ($ARGV[0] eq '-w') { + $opt_width = +$ARGV[1]; + shift @ARGV; + shift @ARGV; +} + if ($#ARGV != 1) { print STDERR "\n"; print STDERR "VCDCD - Value Change Dump Change Dumper\n"; print STDERR "\n"; - print STDERR "Usage: $0 gold.vcd gate.vcd\n"; + print STDERR "Usage: $0 [-w N] gold.vcd gate.vcd\n"; print STDERR "\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 with large vcd files.\n"; + print STDERR "This is not very efficient -- so use with care on large vcd files.\n"; print STDERR "\n"; exit 1; } @@ -112,6 +119,8 @@ for my $key (keys %$vcd_gate) { } } +$signal_maxlen = $opt_width if $opt_width > 0; + my $diffcount = 0; my %state_gold; my %state_gate; @@ -161,8 +170,11 @@ sub cmp_signal($$) my @a = split //, $a; my @b = split //, $b; - unshift @a, "-" while $#a < $#b; - unshift @b, "-" while $#b < $#a; + my $trail_a = $#a < 0 ? '-' : $a[0] eq '1' ? '0' : $a[0]; + my $trail_b = $#b < 0 ? '-' : $b[0] eq '1' ? '0' : $b[0]; + + unshift @a, $trail_a while $#a < $#b; + unshift @b, $trail_b while $#b < $#a; for (my $i = 0; $i <= $#a; $i++) { return 0 if $a[$i] ne "x" && $a[$i] ne $b[$i]; |