From 98e6463ca78d8c0a342c9b86d9223dbeb45c093c Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sat, 6 Sep 2014 19:44:28 +0200
Subject: Added $macc eval model

---
 kernel/consteval.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/kernel/consteval.h b/kernel/consteval.h
index c73a0b35..f995c9cc 100644
--- a/kernel/consteval.h
+++ b/kernel/consteval.h
@@ -23,6 +23,7 @@
 #include "kernel/rtlil.h"
 #include "kernel/sigtools.h"
 #include "kernel/celltypes.h"
+#include "kernel/macc.h"
 
 struct ConstEval
 {
@@ -210,6 +211,27 @@ struct ConstEval
 				}
 			}
 		}
+		else if (cell->type == "$macc")
+		{
+			Macc macc;
+			macc.from_cell(cell);
+
+			if (!eval(macc.bit_ports, undef, cell))
+				return false;
+
+			for (auto &port : macc.ports) {
+				if (!eval(port.in_a, undef, cell))
+					return false;
+				if (!eval(port.in_b, undef, cell))
+					return false;
+			}
+
+			RTLIL::Const result(0, SIZE(cell->getPort("\\Y")));
+			if (!macc.eval(result))
+				log_abort();
+
+			set(cell->getPort("\\Y"), result);
+		}
 		else
 		{
 			RTLIL::SigSpec sig_c, sig_d;
-- 
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