From 7cfdf4ffa7698fa40aae401c2b8b159a6e37011a Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Wed, 12 Feb 2020 12:16:01 -0800
Subject: [PATCH] verilog: fix $specify3 check

---
 frontends/ast/genrtlil.cc | 18 +++++++++++-------
 tests/various/specify.v   |  7 +++++++
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc
index 94f5c0a04..05a5b45b8 100644
--- a/frontends/ast/genrtlil.cc
+++ b/frontends/ast/genrtlil.cc
@@ -1559,21 +1559,25 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
 					log_file_error(filename, linenum, "Attribute `%s' with non-constant value.\n", attr.first.c_str());
 				cell->attributes[attr.first] = attr.second->asAttrConst();
 			}
-			if (cell->type.in("$specify2", "$specify3")) {
+			if (cell->type == "$specify2") {
 				int src_width = GetSize(cell->getPort("\\SRC"));
 				int dst_width = GetSize(cell->getPort("\\DST"));
 				bool full = cell->getParam("\\FULL").as_bool();
 				if (!full && src_width != dst_width)
 					log_file_error(filename, linenum, "Parallel specify SRC width does not match DST width.\n");
-				if (cell->type == "$specify3") {
-					int dat_width = GetSize(cell->getPort("\\DAT"));
-					if (dat_width != dst_width)
-						log_file_error(filename, linenum, "Specify DAT width does not match DST width.\n");
-				}
 				cell->setParam("\\SRC_WIDTH", Const(src_width));
 				cell->setParam("\\DST_WIDTH", Const(dst_width));
 			}
-			if (cell->type == "$specrule") {
+			else if (cell->type ==  "$specify3") {
+				int dat_width = GetSize(cell->getPort("\\DAT"));
+				int dst_width = GetSize(cell->getPort("\\DST"));
+				if (dat_width != dst_width)
+					log_file_error(filename, linenum, "Specify DAT width does not match DST width.\n");
+				int src_width = GetSize(cell->getPort("\\SRC"));
+				cell->setParam("\\SRC_WIDTH", Const(src_width));
+				cell->setParam("\\DST_WIDTH", Const(dst_width));
+			}
+			else if (cell->type == "$specrule") {
 				int src_width = GetSize(cell->getPort("\\SRC"));
 				int dst_width = GetSize(cell->getPort("\\DST"));
 				cell->setParam("\\SRC_WIDTH", Const(src_width));
diff --git a/tests/various/specify.v b/tests/various/specify.v
index 5d44d78f7..e4dd132f1 100644
--- a/tests/various/specify.v
+++ b/tests/various/specify.v
@@ -37,3 +37,10 @@ specify
   (posedge clk *> (q +: d)) = (3,1);
 endspecify
 endmodule
+
+module test3(input clk, input [1:0] d, output [1:0] q);
+specify
+  (posedge clk => (q +: d)) = (3,1);
+  (posedge clk *> (q +: d)) = (3,1);
+endspecify
+endmodule
-- 
2.30.2