add truth table generator

migScope/tools/truthtable.py

@@ -0,0 +1,29 @@
+import os
+import re 
+import sys
+
+def get_operands(s):
+	return sorted(re.findall("[A-z0-9_]+",s))
+
+def gen_truth_table(s):
+	operands = get_operands(s)
+	width = len(operands)
+	stim = []
+	for i in range(width):
+		stim_op = []
+		for j in range(2**width):
+			stim_op.append((int(j/(2**i)))%2)
+		stim.append(stim_op)
+	
+	truth_table = []
+	for i in range(2**width):
+		for j in range(width):
+			exec("%s = stim[j][i]" %operands[j])
+		truth_table.append(eval(s))
+	return truth_table
+
+def main():
+	print(gen_truth_table("(A&B&C)|D"))
+
+if __name__ == '__main__':
+  main()

top.py

@@ -8,6 +8,8 @@ from migen.bus import csr
 import migScope
 import spi2Csr
 
+from migScope.tools.truthtable import *
+
 #
 #Test Term
 #
@@ -91,4 +93,6 @@ print(v)
 #v = verilog.convert(spi2csr0.get_fragment())
 #print(v)
 
+print(gen_truth_table("A&B&C"))
+