From 24971fda87e66af528aeeffab841a64fc960410a Mon Sep 17 00:00:00 2001
From: Jakob Wenzel <wenzel@rs.tu-darmstadt.de>
Date: Mon, 19 Aug 2019 14:17:36 +0200
Subject: [PATCH] handle real values when deriving ast modules

---
 frontends/ast/ast.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/frontends/ast/ast.cc b/frontends/ast/ast.cc
index 0d6626b19..82283fb5b 100644
--- a/frontends/ast/ast.cc
+++ b/frontends/ast/ast.cc
@@ -1502,7 +1502,10 @@ std::string AstModule::derive_common(RTLIL::Design *design, dict<RTLIL::IdString
 	rewrite_parameter:
 			para_info += stringf("%s=%s", child->str.c_str(), log_signal(RTLIL::SigSpec(parameters[para_id])));
 			delete child->children.at(0);
-			if ((parameters[para_id].flags & RTLIL::CONST_FLAG_STRING) != 0)
+			if ((parameters[para_id].flags & RTLIL::CONST_FLAG_REAL) != 0) {
+				child->children[0] = new AstNode(AST_REALVALUE);
+				child->children[0]->realvalue = std::stod(parameters[para_id].decode_string());
+			} else if ((parameters[para_id].flags & RTLIL::CONST_FLAG_STRING) != 0)
 				child->children[0] = AstNode::mkconst_str(parameters[para_id].decode_string());
 			else
 				child->children[0] = AstNode::mkconst_bits(parameters[para_id].bits, (parameters[para_id].flags & RTLIL::CONST_FLAG_SIGNED) != 0);