From 13ecbd5c76b37b8dc14b945a63d1a54b1fcfeced Mon Sep 17 00:00:00 2001
From: Lofty <dan.ravensloft@gmail.com>
Date: Thu, 3 Oct 2024 20:05:28 +0100
Subject: [PATCH] quicklogic: test that dividing by a constant does not infer
 carry chains

---
 tests/arch/quicklogic/qlf_k6n10f/div.ys | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 tests/arch/quicklogic/qlf_k6n10f/div.ys

diff --git a/tests/arch/quicklogic/qlf_k6n10f/div.ys b/tests/arch/quicklogic/qlf_k6n10f/div.ys
new file mode 100644
index 000000000..5ca5b3051
--- /dev/null
+++ b/tests/arch/quicklogic/qlf_k6n10f/div.ys
@@ -0,0 +1,14 @@
+# division by constants should not infer carry chains.
+read_verilog <<EOF
+
+module top (input [15:0] a, output [15:0] y);
+assign y = a / 3;
+endmodule
+
+EOF
+
+equiv_opt -assert -map +/quicklogic/qlf_k6n10f/cells_sim.v synth_quicklogic -family qlf_k6n10f
+design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
+cd top # Constrain all select calls below inside the top module
+select -assert-count 26 t:$lut
+select -assert-none t:$lut %% t:* %D