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-rw-r--r--tests/ice40/macc.v3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/ice40/macc.v b/tests/ice40/macc.v
index 115f8ce42..63a3d3a74 100644
--- a/tests/ice40/macc.v
+++ b/tests/ice40/macc.v
@@ -1,3 +1,6 @@
+/*
+Example from: https://www.latticesemi.com/-/media/LatticeSemi/Documents/UserManuals/EI/iCEcube201701UserGuide.ashx?document_id=52071 [p. 77].
+*/
module top(clk,a,b,c,set);
parameter A_WIDTH = 4;
parameter B_WIDTH = 3;