https://github.com/pyparsing/pyparsing/issues/327

Index: miasm/core/cpu.py
--- miasm/core/cpu.py.orig
+++ miasm/core/cpu.py
@@ -393,7 +393,7 @@ variable = pyparsing.Word(pyparsing.alphas + "_$.", py
 variable.setParseAction(cb_parse_id)
 operand = str_int | variable
 
-base_expr = pyparsing.operatorPrecedence(operand,
+base_expr = pyparsing.infix_notation(operand,
                                [(notop,   1, pyparsing.opAssoc.RIGHT, cb_op_not),
                                 (andop, 2, pyparsing.opAssoc.RIGHT, cb_op_and),
                                 (xorop, 2, pyparsing.opAssoc.RIGHT, cb_op_xor),
