From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Fri, 14 Sep 2012 10:26:48 +0000 (+0200)
Subject: migScope/tools/truthtable.py: add function to remove duplicate operands
X-Git-Tag: 24jan2021_ls180~2575^2~145
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cde176a0b7d62fd76ccce12fad50d115cd6e240d;p=litex.git

migScope/tools/truthtable.py: add function to remove duplicate operands
---

diff --git a/migScope/tools/truthtable.py b/migScope/tools/truthtable.py
index ed53e2d3..d38316b9 100644
--- a/migScope/tools/truthtable.py
+++ b/migScope/tools/truthtable.py
@@ -2,8 +2,14 @@ import os
 import re 
 import sys
 
+def remove_duplicates(seq):
+    seen = set()
+    seen_add = seen.add
+    return [ x for x in seq if x not in seen and not seen_add(x)]
+
 def get_operands(s):
-	return sorted(re.findall("[A-z0-9_]+", s))
+	operands = remove_duplicates(sorted(re.findall("[A-z0-9_]+", s)))
+	return operands
 
 def gen_truth_table(s):
 	operands = get_operands(s)
@@ -19,7 +25,7 @@ def gen_truth_table(s):
 	for i in range(2**width):
 		for j in range(width):
 			exec("%s = stim[j][i]" %operands[j])
-		truth_table.append(eval(s))
+		truth_table.append(eval(s) != 0)
 	return truth_table
 
 def main():